Version 0.1.9 from FTP
authorMark Spencer <markster@digium.com>
Tue, 9 Oct 2001 02:06:21 +0000 (02:06 +0000)
committerMark Spencer <markster@digium.com>
Tue, 9 Oct 2001 02:06:21 +0000 (02:06 +0000)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@364 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c [new file with mode: 0755]

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
new file mode 100755 (executable)
index 0000000..36c559d
--- /dev/null
@@ -0,0 +1,4288 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Tormenta T1 Card (via Zapata library) support 
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+#include <string.h>
+#include <asterisk/channel.h>
+#include <asterisk/channel_pvt.h>
+#include <asterisk/config.h>
+#include <asterisk/logger.h>
+#include <asterisk/module.h>
+#include <asterisk/pbx.h>
+#include <asterisk/options.h>
+#include <asterisk/file.h>
+#include <asterisk/ulaw.h>
+#include <asterisk/callerid.h>
+#include <asterisk/cli.h>
+#include <sys/signal.h>
+#include <sys/select.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <linux/zaptel.h>
+#include <zap.h>
+#include <math.h>
+#include <tonezone.h>
+#ifdef ZAPATA_PRI
+#include <libpri.h>
+#endif
+
+/* 
+   XXX 
+   XXX   We definitely need to lock the private structure in zt_read and such 
+   XXX  
+ */
+
+#define RINGT 274
+
+#ifdef ZAPATA_PRI
+static char *desc = "Zapata Telephony (PRI) Driver";
+static char *tdesc = "Zapata Telephony + PRI Interface Driver";
+#else
+static char *desc = "Zapata Telphony Driver";
+static char *tdesc = "Zapata Telephony Interface Driver";
+#endif
+static char *type = "Zap";
+static char *typecompat = "Tor";       /* Retain compatibility with chan_tor */
+static char *config = "zapata.conf";
+
+#define SIG_EM         ZT_SIG_EM
+#define SIG_EMWINK     (0x10000 | ZT_SIG_EM)
+#define SIG_FEATD      (0x20000 | ZT_SIG_EM)
+#define SIG_FXSLS      ZT_SIG_FXSLS
+#define SIG_FXSGS      ZT_SIG_FXSGS
+#define SIG_FXSKS      ZT_SIG_FXSKS
+#define SIG_FXOLS      ZT_SIG_FXOLS
+#define SIG_FXOGS      ZT_SIG_FXOGS
+#define SIG_FXOKS      ZT_SIG_FXOKS
+#define SIG_PRI                ZT_SIG_CLEAR
+
+#define NUM_SPANS      2
+
+static char context[AST_MAX_EXTENSION] = "default";
+static char callerid[256] = "";
+
+static char language[MAX_LANGUAGE] = "";
+
+static int use_callerid = 1;
+
+static int cur_signalling = -1;
+
+static int cur_group = 0;
+static int cur_callergroup = 0;
+static int cur_pickupgroup = 0;
+
+static int immediate = 0;
+
+static int stripmsd = 0;
+
+static int callwaiting = 0;
+
+static int callwaitingcallerid = 0;
+
+static int hidecallerid = 0;
+
+static int threewaycalling = 0;
+
+static int transfer = 0;
+
+static float rxgain = 0.0;
+
+static float txgain = 0.0;
+
+static int echocancel;
+
+/* Wait up to 16 seconds for first digit (FXO logic) */
+static int firstdigittimeout = 16000;
+
+/* How long to wait for following digits (FXO logic) */
+static int gendigittimeout = 8000;
+
+static int usecnt =0;
+static pthread_mutex_t usecnt_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/* Protect the interface list (of zt_pvt's) */
+static pthread_mutex_t iflock = PTHREAD_MUTEX_INITIALIZER;
+
+/* Protect the monitoring thread, so only one process can kill or start it, and not
+   when it's doing something critical. */
+static pthread_mutex_t monlock = PTHREAD_MUTEX_INITIALIZER;
+
+/* This is the thread for the monitor which checks for input on the channels
+   which are not currently in use.  */
+static pthread_t monitor_thread = 0;
+
+static int restart_monitor(void);
+
+static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
+
+static inline int zt_get_event(int fd)
+{
+       /* Avoid the silly zt_getevent which ignores a bunch of events */
+       int j;
+       if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
+       return j;
+}
+
+static inline int zt_wait_event(int fd)
+{
+       /* Avoid the silly zt_waitevent which ignores a bunch of events */
+       int i,j=0;
+       i = ZT_IOMUX_SIGEVENT;
+       if (ioctl(fd, ZT_IOMUX, &i) == -1) return -1;
+       if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
+       return j;
+}
+
+/* Chunk size to read -- we use the same size as the chunks that the zapata library uses.  */   
+#define READ_SIZE 204
+
+#define MASK_AVAIL             (1 << 0)                /* Channel available for PRI use */
+#define MASK_INUSE             (1 << 1)                /* Channel currently in use */
+
+#define CALLWAITING_SILENT_SAMPLES     ( (300 * 8) / READ_SIZE) /* 300 ms */
+#define CALLWAITING_REPEAT_SAMPLES     ( (10000 * 8) / READ_SIZE) /* 300 ms */
+
+struct zt_pvt;
+
+
+#ifdef ZAPATA_PRI
+struct zt_pri {
+       pthread_t master;                       /* Thread of master */
+       pthread_mutex_t lock;           /* Mutex */
+       int nodetype;                           /* Node type */
+       int switchtype;                         /* Type of switch to emulate */
+       struct pri *pri;
+       int debug;
+       int fd;
+       int up;
+       int offset;
+       int span;
+       int chanmask[24];                       /* Channel status */
+       struct zt_pvt *pvt[24]; /* Member channel pvt structs */
+       struct zt_channel *chan[24];    /* Channels on each line */
+};
+
+
+static struct zt_pri pris[NUM_SPANS];
+
+static int pritype = PRI_CPE;
+
+#if 0
+#define DEFAULT_PRI_DEBUG (PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q931_STATE)
+#else
+#define DEFAULT_PRI_DEBUG 0
+/*
+#define DEFAULT_PRI_DEBUG (PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q921_DUMP | PRI_DEBUG_Q921_RAW)
+*/
+#endif
+
+static inline int pri_grab(struct zt_pri *pri)
+{
+       int res;
+       /* Grab the lock first */
+    res = ast_pthread_mutex_lock(&pri->lock);
+       if (res)
+               return res;
+       /* Then break the select */
+       pthread_kill(pri->master, SIGURG);
+       return 0;
+}
+
+static inline void pri_rel(struct zt_pri *pri)
+{
+       ast_pthread_mutex_unlock(&pri->lock);
+}
+
+static int switchtype = PRI_SWITCH_NI2;
+
+#endif
+
+static struct zt_pvt {
+       ZAP *z;
+       pthread_mutex_t lock;
+       struct ast_channel *owner;      /* Our owner (if applicable) */
+       struct ast_channel *owners[3];  
+               /* Up to three channels can be associated with this call */
+               
+       int callwaitindex;                      /* Call waiting index into owners */    
+       int thirdcallindex;                     /* Three-way calling index into owners */
+       int normalindex;                        /* "Normal" call index into owners */
+       
+       int sig;                                        /* Signalling style */
+       float rxgain;
+       float txgain;
+       struct zt_pvt *next;                    /* Next channel in list */
+       char context[AST_MAX_EXTENSION];
+       char exten[AST_MAX_EXTENSION];
+       char language[MAX_LANGUAGE];
+       char callerid[AST_MAX_EXTENSION];
+       char callwaitcid[AST_MAX_EXTENSION];
+       char dtmfq[AST_MAX_EXTENSION];
+       struct ast_frame f_unused;      /* Usually unused, but could in rare cases be needed */
+       struct ast_frame f[3];          /* One frame for each channel.  How did this ever work before? */
+       short buffer[3][AST_FRIENDLY_OFFSET/2 + READ_SIZE];
+       int group;
+       int callgroup;
+       int pickupgroup;
+       int immediate;                          /* Answer before getting digits? */
+       int channel;                            /* Channel Number */
+       int span;                                       /* Span number */
+       int dialing;
+       int use_callerid;                       /* Whether or not to use caller id on this channel */
+       int hidecallerid;
+       int permhidecallerid;           /* Whether to hide our outgoing caller ID or not */
+       int callwaitingrepeat;          /* How many samples to wait before repeating call waiting */
+       unsigned char *cidspill;
+       int cidpos;
+       int cidlen;
+       int ringt;
+       int stripmsd;
+       int needringing[3];
+       int needanswer[3];
+       int callwaiting;
+       int callwaitcas;
+       int callwaitrings;
+       int echocancel;
+       int permcallwaiting;
+       int callwaitingcallerid;
+       int threewaycalling;
+       int transfer;
+       int cref;                                       /* Call reference number */
+       ZT_DIAL_OPERATION dop;
+       struct zt_confinfo conf;        /* Saved state of conference */
+       struct zt_confinfo conf2;       /* Saved state of alternate conference */
+       int confno;                                     /* Conference number */
+       ZAP *pseudo;                            /* Pseudo channel FD */
+       int pseudochan;                         /* Pseudo channel */
+       int destroy;
+       int ignoredtmf;                         
+       int inalarm;
+#ifdef ZAPATA_PRI
+       struct zt_pri *pri;
+       q931_call *call;
+#endif 
+} *iflist = NULL;
+
+#define INTHREEWAY(p) ((p->normalindex > -1) && (p->thirdcallindex > -1) && \
+               (p->owner == p->owners[p->normalindex]))
+
+#define ISTRUNK(p) ((p->sig == SIG_FXSLS) || (p->sig == SIG_FXSKS) || \
+                       (p->sig == SIG_FXSGS))
+
+
+/* return non-zero if clear dtmf is appropriate */
+static int CLEARDTMF(struct ast_channel *chan) {
+struct zt_pvt *p = chan->pvt->pvt,*themp;
+struct ast_channel *them;
+       if (!p)
+               return 0;
+         /* if not in a 3 way, we should be okay */
+       if (p->thirdcallindex == -1) return 1;
+         /* get the other side of the call's channel pointer */
+       if (p->owners[p->normalindex] == chan)
+               them = p->owners[p->thirdcallindex];
+       else
+               them = p->owners[p->normalindex];
+       if (!them->bridge) return 1;
+         /* get their private structure, too */
+       themp = them->pvt->pvt;
+         /* if does not use zt bridge code, return 0 */
+       if (them->pvt->bridge != zt_bridge) return 0;
+       if (them->bridge->pvt->bridge != zt_bridge) return 0;
+       return 1; /* okay, I guess we are okay to be clear */
+}
+
+static int alloc_pseudo(struct zt_pvt *p)
+{
+       int x;
+       ZAP *z;
+       int res;
+       ZT_BUFFERINFO bi;
+       if (p->pseudo || p->pseudochan){
+               ast_log(LOG_WARNING, "Already have a pseudo fd: %d, chan: %d\n",
+                       zap_fd(p->pseudo), p->pseudochan);
+               return -1;
+       }
+       z = zap_open("/dev/zap/pseudo", 1);
+       if (!z) {
+               ast_log(LOG_WARNING, "Unable to open /dev/zap/pseudo: %s\n", strerror(errno));
+               return -1;
+       } else {
+               res = ioctl(zap_fd(z), ZT_GET_BUFINFO, &bi);
+               if (!res) {
+                       bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
+                       bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
+                       bi.numbufs = 4;
+                       res = ioctl(zap_fd(z), ZT_SET_BUFINFO, &bi);
+                       if (res < 0) {
+                               ast_log(LOG_WARNING, "Unable to set buffer policy on channel %d\n", x);
+                       }
+               } else 
+                       ast_log(LOG_WARNING, "Unable to check buffer policy on channel %d\n", x);
+               p->pseudo = z;
+               if (ioctl(zap_fd(z), ZT_CHANNO, &x) == 1) {
+                       ast_log(LOG_WARNING,"Unable to get channel number for pseudo channel on FD %d\n",zap_fd(z));
+                       return -1;
+               }
+               p->pseudochan = x;
+               if (option_debug)
+                       ast_log(LOG_DEBUG, "Allocated pseudo channel %d on FD %d\n", p->pseudochan, zap_fd(p->pseudo));
+               return 0;
+       }
+       /* Never reached */
+       return 0;
+}
+
+static int unalloc_pseudo(struct zt_pvt *p)
+{
+       if (p->pseudo)
+               zap_close(p->pseudo);
+       if (option_debug)
+               ast_log(LOG_DEBUG, "Released pseudo channel %d\n", p->pseudochan);
+       p->pseudo = NULL;
+       p->pseudochan = 0;
+       return 0;
+}
+
+static int zt_digit(struct ast_channel *ast, char digit)
+{
+       ZT_DIAL_OPERATION zo;
+       struct zt_pvt *p;
+       int res;
+       zo.op = ZT_DIAL_OP_APPEND;
+       zo.dialstr[0] = 'T';
+       zo.dialstr[1] = digit;
+       zo.dialstr[2] = 0;
+       p = ast->pvt->pvt;
+       if ((res = ioctl(zap_fd(p->z), ZT_DIAL, &zo)))
+               ast_log(LOG_WARNING, "Couldn't dial digit %c\n", digit);
+       else
+               p->dialing = 1;
+       
+       return res;
+}
+
+static char *events[] = {
+        "No event",
+        "On hook",
+        "Ring/Answered",
+        "Wink/Flash",
+        "Alarm",
+        "No more alarm",
+               "HDLC Abort",
+               "HDLC Overrun",
+               "HDLC Bad FCS",
+               "Dial Complete",
+               "Ringer On",
+               "Ringer Off",
+               "Hook Transition Complete"
+};
+static char *event2str(int event)
+{
+        static char buf[256];
+        if ((event < 13) && (event > -1))
+                return events[event];
+        sprintf(buf, "Event %d", event);
+        return buf;
+}
+
+static char *sig2str(int sig)
+{
+       static char buf[256];
+       switch(sig) {
+       case SIG_EM:
+               return "E & M Immediate";
+       case SIG_EMWINK:
+               return "E & M Wink";
+       case SIG_FEATD:
+               return "Feature Group D";
+       case SIG_FXSLS:
+               return "FXS Loopstart";
+       case SIG_FXSGS:
+               return "FXS Groundstart";
+       case SIG_FXSKS:
+               return "FXS Kewlstart";
+       case SIG_FXOLS:
+               return "FXO Loopstart";
+       case SIG_FXOGS:
+               return "FXO Groundstart";
+       case SIG_FXOKS:
+               return "FXO Kewlstart";
+       case SIG_PRI:
+               return "PRI Signalling";
+       default:
+               snprintf(buf, sizeof(buf), "Unknown signalling %d\n", sig);
+               return buf;
+       }
+}
+
+static int conf_set(struct zt_pvt *p, int req, int force)
+{
+
+       /* Set channel to given conference, -1 to allocate one */
+       ZT_CONFINFO ci;
+       ZT_CONFINFO cip;
+       int res;
+       if ((p->confno > -1) && (p->confno != req) && (!force)) {
+               ast_log(LOG_WARNING, "Channel %d already has conference %d allocated\n", p->channel, p->confno);
+               return -1;
+       }
+       ci.chan = 0;
+       ci.confno = 0;
+       /* Check current conference stuff */
+       res = ioctl(zap_fd(p->z), ZT_GETCONF, &ci);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Failed to get conference info on channel %d: %s\n",
+                       p->channel, strerror(errno));
+               return -1;
+       }
+       if (!force && ci.confmode && (ci.confno != p->confno)) {
+               ast_log(LOG_WARNING, "Channel %d is already in a conference (%d, %x) we didn't create (req = %d)\n", p->channel, ci.confno, ci.confmode, req);
+               return -1;
+       }
+       ci.chan = 0;
+       ci.confno = req;
+       ci.confmode = ZT_CONF_REALANDPSEUDO | ZT_CONF_TALKER | ZT_CONF_LISTENER | ZT_CONF_PSEUDO_LISTENER | ZT_CONF_PSEUDO_TALKER; 
+       res = ioctl(zap_fd(p->z), ZT_SETCONF, &ci);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Failed to set conference to %d on channel %d: %s\n",
+                       req, p->channel, strerror(errno));
+               return -1;
+       }
+       if (INTHREEWAY(p)) {
+                       /* We have a three way call active, be sure the third participant is included in
+                          our conference. */
+               cip.chan = 0;
+               cip.confno = ci.confno;
+               cip.confmode = ZT_CONF_CONF | ZT_CONF_TALKER | ZT_CONF_LISTENER;
+               
+               res = ioctl(zap_fd(p->pseudo), ZT_SETCONF, &cip);
+               if (res < 0) {
+                       ast_log(LOG_WARNING, "Failed to set conference info on pseudo channel %d: %s\n",
+                               p->pseudochan, strerror(errno));
+                       return -1;
+               }
+               ast_log(LOG_DEBUG, "Conferenced in third way call\n");
+       } else {
+               if (p->pseudo || (p->pseudochan)) {
+                       ast_log(LOG_DEBUG, "There's a pseudo something on %d (channel %d), but we're not conferencing it in at the moment?\n",
+                               zap_fd(p->pseudo), p->pseudochan);
+                       cip.chan = 0;
+                       cip.confno = ci.confno;
+                       cip.confmode = ZT_CONF_NORMAL;
+                       res = ioctl(zap_fd(p->pseudo), ZT_SETCONF, &cip);
+                       if (res < 0) {
+                               ast_log(LOG_WARNING, "Failed to set conference info on pseudo channel %d: %s\n",
+                                       p->pseudochan, strerror(errno));
+                               return -1;
+                       }
+               }
+       }
+       p->confno = ci.confno;
+       return 0;
+}
+
+static int three_way(struct zt_pvt *p)
+{
+       ast_log(LOG_DEBUG, "Setting up three way call\n");
+       return conf_set(p, p->confno, 0);
+}
+
+static int conf_clear(struct zt_pvt *p)
+{
+       ZT_CONFINFO ci;
+       int res;
+       ci.confmode = ZT_CONF_NORMAL;
+       ci.chan = 0;
+       ci.confno = 0;
+       res = ioctl(zap_fd(p->z), ZT_SETCONF, &ci);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Failed to clear conference info on channel %d: %s\n",
+                       p->channel, strerror(errno));
+               return -1;
+       }
+       p->confno = -1;
+       return 0;
+}
+
+static void zt_enable_ec(struct zt_pvt *p)
+{
+       int x;
+       int res;
+       if (p->echocancel) {
+               x = 1;
+               res = ioctl(zap_fd(p->z), ZT_ECHOCANCEL, &x);
+               if (res) 
+                       ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
+               else
+                       ast_log(LOG_DEBUG, "Enabled echo cancellation on channel %d\n", p->channel);
+       }
+}
+
+static void zt_disable_ec(struct zt_pvt *p)
+{
+       int x;
+       int res;
+       if (p->echocancel) {
+               x = 0;
+               res = ioctl(zap_fd(p->z), ZT_ECHOCANCEL, &x);
+               if (res) 
+                       ast_log(LOG_WARNING, "Unable to disable echo cancellation on channel %d\n", p->channel);
+               else
+                       ast_log(LOG_DEBUG, "disabled echo cancellation on channel %d\n", p->channel);
+       }
+}
+
+static int zt_get_index(struct ast_channel *ast, struct zt_pvt *p, int nullok)
+{
+       int res;
+       if (p->owners[0] == ast)
+               res = 0;
+       else if (p->owners[1] == ast)
+               res = 1;
+       else if (p->owners[2] == ast)
+               res = 2;
+       else {
+               res = -1;
+               if (!nullok)
+                       ast_log(LOG_WARNING, "Unable to get index, and nullok is not asserted\n");
+       }
+       return res;
+}
+
+static int set_actual_gain(int fd, int chan, float rxgain, float txgain)
+{
+       struct  zt_gains g;
+       float ltxgain;
+       float lrxgain;
+       int j,k;
+       g.chan = chan;
+         /* caluculate linear value of tx gain */
+       ltxgain = pow(10.0,txgain / 20.0);
+         /* caluculate linear value of rx gain */
+       lrxgain = pow(10.0,rxgain / 20.0);
+       for (j=0;j<256;j++) {
+               k = (int)(((float)ast_mulaw[j]) * lrxgain);
+               if (k > 32767) k = 32767;
+               if (k < -32767) k = -32767;
+               g.rxgain[j] = ast_lin2mu[k + 32768];
+               k = (int)(((float)ast_mulaw[j]) * ltxgain);
+               if (k > 32767) k = 32767;
+               if (k < -32767) k = -32767;
+               g.txgain[j] = ast_lin2mu[k + 32768];
+       }
+               
+         /* set 'em */
+       return(ioctl(fd,ZT_SETGAINS,&g));
+}
+
+static inline int zt_set_hook(int fd, int hs)
+{
+       int x, res;
+       x = hs;
+       res = ioctl(fd, ZT_HOOK, &x);
+       if (res < 0) 
+               ast_log(LOG_WARNING, "zt hook failed: %s\n", strerror(errno));
+       return res;
+}
+
+static int save_conference(struct zt_pvt *p)
+{
+       struct zt_confinfo c;
+       int res;
+       if (p->conf.confmode) {
+               ast_log(LOG_WARNING, "Can't save conference -- already in use\n");
+               return -1;
+       }
+       p->conf.chan = 0;
+       res = ioctl(zap_fd(p->z), ZT_GETCONF, &p->conf);
+       if (res) {
+               ast_log(LOG_WARNING, "Unable to get conference info: %s\n", strerror(errno));
+               p->conf.confmode = 0;
+               return -1;
+       }
+       c.chan = 0;
+       c.confno = 0;
+       c.confmode = ZT_CONF_NORMAL;
+       res = ioctl(zap_fd(p->z), ZT_SETCONF, &c);
+       if (res) {
+               ast_log(LOG_WARNING, "Unable to set conference info: %s\n", strerror(errno));
+               return -1;
+       }
+       switch(p->conf.confmode) {
+       case ZT_CONF_NORMAL:
+               p->conf2.confmode = 0;
+               break;
+       case ZT_CONF_MONITOR:
+               /* Get the other size */
+               p->conf2.chan = p->conf.confno;
+               res = ioctl(zap_fd(p->z), ZT_GETCONF, &p->conf2);
+               if (res) {
+                       ast_log(LOG_WARNING, "Unable to get secondaryconference info: %s\n", strerror(errno));
+                       p->conf2.confmode = 0;
+                       return -1;
+               }
+               c.chan = p->conf.confno;
+               c.confno = 0;
+               c.confmode = ZT_CONF_NORMAL;
+               res = ioctl(zap_fd(p->z), ZT_SETCONF, &c);
+               if (res) {
+                       ast_log(LOG_WARNING, "Unable to set secondaryconference info: %s\n", strerror(errno));
+                       p->conf2.confmode = 0;
+                       return -1;
+               }
+               break;
+       case ZT_CONF_CONF | ZT_CONF_LISTENER | ZT_CONF_TALKER:
+               p->conf2.confmode = 0;
+               break;
+       default:
+               ast_log(LOG_WARNING, "Don't know how to save conference state for conf mode %d\n", p->conf.confmode);
+               return -1;
+       }
+       if (option_debug)
+               ast_log(LOG_DEBUG, "Disabled conferencing\n");
+       return 0;
+}
+
+static int restore_conference(struct zt_pvt *p)
+{
+       int res;
+       if (p->conf.confmode) {
+               res = ioctl(zap_fd(p->z), ZT_SETCONF, &p->conf);
+               p->conf.confmode = 0;
+               if (res) {
+                       ast_log(LOG_WARNING, "Unable to restore conference info: %s\n", strerror(errno));
+                       return -1;
+               }
+               if (p->conf2.confmode) {
+                       res = ioctl(zap_fd(p->z), ZT_SETCONF, &p->conf2);
+                       p->conf2.confmode = 0;
+                       if (res) {
+                               ast_log(LOG_WARNING, "Unable to restore conference info: %s\n", strerror(errno));
+                               return -1;
+                       }
+               }
+       }
+       if (option_debug)
+               ast_log(LOG_DEBUG, "Restored conferencing\n");
+       return 0;
+}
+
+static int send_callerid(struct zt_pvt *p);
+
+int send_cwcidspill(struct zt_pvt *p)
+{
+       p->callwaitcas = 0;
+       p->cidspill = malloc(MAX_CALLERID_SIZE);
+       if (p->cidspill) {
+               memset(p->cidspill, 0x7f, MAX_CALLERID_SIZE);
+               p->cidlen = ast_callerid_callwaiting_generate(p->cidspill, p->callwaitcid);
+               /* Make sure we account for the end */
+               p->cidlen += READ_SIZE * 4;
+               p->cidpos = 0;
+               send_callerid(p);
+               if (option_verbose > 2)
+                       ast_verbose(VERBOSE_PREFIX_3 "CPE supports Call Waiting Caller*ID.  Sending '%s'\n", p->callwaitcid);
+       } else return -1;
+       return 0;
+}
+
+static int send_callerid(struct zt_pvt *p)
+{
+       /* Assumes spill in p->cidspill, p->cidlen in length and we're p->cidpos into it */
+       int res;
+       while(p->cidpos < p->cidlen) {
+               res = write(zap_fd(p->z), p->cidspill + p->cidpos, p->cidlen - p->cidpos);
+               if (res < 0) {
+                       if (errno == EAGAIN)
+                               return 0;
+                       else {
+                               ast_log(LOG_WARNING, "write failed: %s\n", strerror(errno));
+                               return -1;
+                       }
+               }
+               if (!res)
+                       return 0;
+               p->cidpos += res;
+       }
+       free(p->cidspill);
+       p->cidspill = 0;
+       if (p->callwaitcas) {
+               zap_clrdtmfn(p->z);
+               /* Check for a the ack on the CAS */
+               res = zap_getdtmf(p->z, 1, NULL, 0, 250, 250, ZAP_HOOKEXIT | ZAP_TIMEOUTOK);
+               if (res > 0) {
+                       char tmp[2];
+                       strncpy(tmp, zap_dtmfbuf(p->z), sizeof(tmp));
+                       zap_clrdtmfn(p->z);
+                       if ((tmp[0] == 'A') || (tmp[0] == 'D')) {
+                               send_cwcidspill(p);
+                       }
+               } else {
+                       if (option_verbose > 2)
+                               ast_verbose(VERBOSE_PREFIX_3 "CPE does not support Call Waiting Caller*ID.\n");
+                       restore_conference(p);
+               }
+       } else
+               restore_conference(p);
+       return 0;
+}
+
+static int zt_callwait(struct ast_channel *ast)
+{
+       struct zt_pvt *p = ast->pvt->pvt;
+       p->callwaitingrepeat = CALLWAITING_REPEAT_SAMPLES;
+       if (p->cidspill) {
+               ast_log(LOG_WARNING, "Spill already exists?!?\n");
+               free(p->cidspill);
+       }
+       p->cidspill = malloc(2400 /* SAS */ + 680 /* CAS */ + READ_SIZE * 4);
+       if (p->cidspill) {
+               save_conference(p);
+               /* Silence */
+               memset(p->cidspill, 0x7f, 2400 + 600 + READ_SIZE * 4);
+               if (!p->callwaitrings && p->callwaitingcallerid) {
+                       ast_callerid_gen_cas(p->cidspill, 2400 + 680);
+                       p->callwaitcas = 1;
+                       p->cidlen = 2400 + 680 + READ_SIZE * 4;
+               } else {
+                       ast_callerid_gen_cas(p->cidspill, 2400);
+                       p->callwaitcas = 0;
+                       p->cidlen = 2400 + READ_SIZE * 4;
+               }
+               p->cidpos = 0;
+               send_callerid(p);
+       } else {
+               ast_log(LOG_WARNING, "Unable to create SAS/CAS spill\n");
+               return -1;
+       }
+       return 0;
+}
+
+static int zt_call(struct ast_channel *ast, char *dest, int timeout)
+{
+       struct zt_pvt *p = ast->pvt->pvt;
+       int x, res, index;
+       char *c, *n, *l;
+       char callerid[256];
+       if ((ast->state != AST_STATE_DOWN) && (ast->state != AST_STATE_RESERVED)) {
+               ast_log(LOG_WARNING, "zt_call called on %s, neither down nor reserved\n", ast->name);
+               return -1;
+       }
+       switch(p->sig) {
+       case SIG_FXOLS:
+       case SIG_FXOGS:
+       case SIG_FXOKS:
+               if (p->owner == ast) {
+                       /* Normal ring, on hook */
+                       if (p->use_callerid) {
+                               /* Generate the Caller-ID spill if desired */
+                               if (p->cidspill) {
+                                       ast_log(LOG_WARNING, "cidspill already exists??\n");
+                                       free(p->cidspill);
+                               }
+                               p->cidspill = malloc(MAX_CALLERID_SIZE);
+                               p->callwaitcas = 0;
+                               if (p->cidspill) {
+                                       p->cidlen = ast_callerid_generate(p->cidspill, ast->callerid);
+                                       p->cidpos = 0;
+                                       send_callerid(p);
+                               } else
+                                       ast_log(LOG_WARNING, "Unable to generate CallerID spill\n");
+                       }
+                       x = ZT_RING;
+                       if (ioctl(zap_fd(p->z), ZT_HOOK, &x) && (errno != EINPROGRESS)) {
+                               ast_log(LOG_WARNING, "Unable to ring phone: %s\n", strerror(errno));
+                               return -1;
+                       }
+                       p->dialing = 1;
+               } else {
+                       /* Call waiting call */
+                       p->callwaitrings = 0;
+                       if (ast->callerid)
+                               strncpy(p->callwaitcid, ast->callerid, sizeof(p->callwaitcid));
+                       else
+                               strcpy(p->callwaitcid, "");
+                       /* Call waiting tone instead */
+                       if (zt_callwait(ast))
+                               return -1;
+                               
+               }
+               ast->state = AST_STATE_RINGING;
+               index = zt_get_index(ast, p, 0);
+               if (index > -1) {
+                       p->needringing[index] = 1;
+               }
+               break;
+       case SIG_FXSLS:
+       case SIG_FXSGS:
+       case SIG_FXSKS:
+       case SIG_EMWINK:
+       case SIG_EM:
+       case SIG_FEATD:
+               c = strchr(dest, '/');
+               if (c)
+                       c++;
+               else
+                       c = dest;
+               if (strlen(c) < p->stripmsd) {
+                       ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
+                       return -1;
+               }
+               x = ZT_START;
+               /* Start the trunk */
+               res = ioctl(zap_fd(p->z), ZT_HOOK, &x);
+               if (res < 0) {
+                       if (errno != EINPROGRESS) {
+                               ast_log(LOG_WARNING, "Unable to start channel: %s\n", strerror(errno));
+                               return -1;
+                       }
+               }
+               ast_log(LOG_DEBUG, "Dialing '%s'\n", c);
+               p->dop.op = ZT_DIAL_OP_REPLACE;
+               if (p->sig == SIG_FEATD) {
+                       if (ast->callerid) {
+                               strncpy(callerid, ast->callerid, sizeof(callerid));
+                               ast_callerid_parse(callerid, &n, &l);
+                               if (l) {
+                                       ast_shrink_phone_number(l);
+                                       if (!ast_isphonenumber(l))
+                                               l = NULL;
+                               }
+                       } else
+                               l = NULL;
+                       if (l) 
+                               snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T*%s*%s*", l, c + p->stripmsd);
+                       else
+                               snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T**%s*", c + p->stripmsd);
+               } else 
+                       snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%s", c + p->stripmsd);
+               if (!res) {
+                       if (ioctl(zap_fd(p->z), ZT_DIAL, &p->dop)) {
+                               x = ZT_ONHOOK;
+                               ioctl(zap_fd(p->z), ZT_HOOK, &x);
+                               ast_log(LOG_WARNING, "Dialing failed on channel %d: %s\n", p->channel, strerror(errno));
+                               return -1;
+                       }
+               } else
+                       ast_log(LOG_DEBUG, "Deferring dialing...\n");
+               p->dialing = 1;
+               ast->state = AST_STATE_DIALING;
+               break;
+#ifdef ZAPATA_PRI
+       case SIG_PRI:
+               c = strchr(dest, '/');
+               if (c)
+                       c++;
+               else
+                       c = dest;
+               if (ast->callerid) {
+                       strncpy(callerid, ast->callerid, sizeof(callerid));
+                       ast_callerid_parse(callerid, &n, &l);
+                       if (l) {
+                               ast_shrink_phone_number(l);
+                               if (!ast_isphonenumber(l))
+                                       l = NULL;
+                       }
+               } else
+                       l = NULL;
+               if (strlen(c) < p->stripmsd) {
+                       ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
+                       return -1;
+               }
+               if (pri_call(p->pri->pri, p->call, PRI_TRANS_CAP_SPEECH, 
+                       ((p->channel - 1) % 24) + 1, p->pri->nodetype == PRI_NETWORK ? 0 : 1, 1, l, PRI_NATIONAL_ISDN, 
+                       l ? PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN : PRES_NUMBER_NOT_AVAILABLE,
+                       c + p->stripmsd, PRI_NATIONAL_ISDN)) {
+                       ast_log(LOG_WARNING, "Unable to setup call to %s\n", c + p->stripmsd);
+                       return -1;
+               }
+               break;
+#endif                         
+       default:
+               ast_log(LOG_DEBUG, "not yet implemented\n");
+               return -1;
+       }
+       return 0;
+}
+
+static int destroy_channel(struct zt_pvt *prev, struct zt_pvt *cur, int now)
+{
+       int owned = 0;
+       int i = 0;
+       int res = 0;
+
+       if (!now) {
+               if (cur->owner) {
+                       owned = 1;
+               }
+
+               for (i = 0; i < 3; i++) {
+                       if (cur->owners[i]) {
+                               owned = 1;
+                       }
+               }
+               if (!owned) {
+                       if (prev) {
+                               prev->next = cur->next;
+                       } else {
+                               iflist = cur->next;
+                       }
+                       res = zap_close(cur->z);
+                       if (res) {
+                               ast_log(LOG_ERROR, "Unable to close device on channel %d\n", cur->channel);
+                               free(cur);
+                               return -1;
+                       }
+                       free(cur);
+               }
+       } else {
+               if (prev) {
+                       prev->next = cur->next;
+               } else {
+                       iflist = cur->next;
+               }
+               res = zap_close(cur->z);
+               if (res) {
+                       ast_log(LOG_ERROR, "Unable to close device on channel %d\n", cur->channel);
+                       free(cur);
+                       return -1;
+               }
+               free(cur);
+       }
+       return 0;
+}
+
+
+static int zt_hangup(struct ast_channel *ast)
+{
+       int res;
+       int index,x;
+       static int restore_gains(struct zt_pvt *p);
+       struct zt_pvt *p = ast->pvt->pvt;
+       struct zt_pvt *tmp = NULL;
+       struct zt_pvt *prev = NULL;
+       ZT_PARAMS par;
+
+
+       if (option_debug)
+               ast_log(LOG_DEBUG, "zt_hangup(%s)\n", ast->name);
+       if (!ast->pvt->pvt) {
+               ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
+               return 0;
+       }
+       index = zt_get_index(ast, p, 1);
+
+       restore_gains(p);
+       zap_digitmode(p->z,0);
+       ast->state = AST_STATE_DOWN;
+       ast_log(LOG_DEBUG, "Hangup: index = %d, normal = %d, callwait = %d, thirdcall = %d\n",
+               index, p->normalindex, p->callwaitindex, p->thirdcallindex);
+       p->ignoredtmf = 0;
+       
+       if (index > -1) {
+               /* Real channel, do some fixup */
+               p->owners[index] = NULL;
+               p->needanswer[index] = 0;
+               p->needringing[index] = 0;
+               if (index == p->normalindex) {
+                       p->normalindex = -1;
+                       if ((p->callwaitindex > -1) && (p->thirdcallindex > -1)) 
+                               ast_log(LOG_WARNING, "Normal call hung up with both three way call and a call waiting call in place?\n");
+                       if (p->callwaitindex > -1) {
+                               /* If we hung up the normal call, make the call wait call
+                                  be the normal call if there was one */
+                               p->normalindex = p->callwaitindex;
+                               p->callwaitindex = -1;
+                       } else if (p->thirdcallindex > -1) {
+                               /* This was part of a three way call */
+                               p->normalindex = p->thirdcallindex;
+                               p->owners[p->normalindex]->fds[0] = zap_fd(p->z);
+                               p->owner = p->owners[p->normalindex];
+                               p->thirdcallindex = -1;
+                               unalloc_pseudo(p);
+                       }
+               } else if (index == p->callwaitindex) {
+                       /* If this was a call waiting call, mark the call wait
+                          index as -1, so we know iavailable again */
+                       p->callwaitindex = -1;
+               } else if (index == p->thirdcallindex) {
+                       /* If this was part of a three way call index, let us make
+                          another three way call */
+                       p->thirdcallindex = -1;
+                       unalloc_pseudo(p);
+               } else {
+                       /* This wasn't any sort of call, but how are we an index? */
+                       ast_log(LOG_WARNING, "Index found but not any type of call?\n");
+               }
+       }
+
+       if (!p->owners[0] && !p->owners[1] && !p->owners[2]) {
+               p->owner = NULL;
+               p->ringt = 0;
+               /* Perform low level hangup if no owner left */
+#ifdef ZAPATA_PRI
+               if (p->sig == SIG_PRI) {
+                       if (p->call) {
+                               if (!pri_grab(p->pri)) {
+                                       res = pri_disconnect(p->pri->pri, p->call, PRI_CAUSE_NORMAL_CLEARING);
+                                       p->call = NULL;
+                                       if (res < 0) 
+                                               ast_log(LOG_WARNING, "pri_disconnect failed\n");
+                                       pri_rel(p->pri);                        
+                               } else {
+                                       ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
+                                       res = -1;
+                               }
+                       } else
+                               res = 0;
+               } else
+#endif
+                       res = zt_set_hook(zap_fd(p->z), ZT_ONHOOK);
+               if (res < 0) {
+                       ast_log(LOG_WARNING, "Unable to hangup line %s\n", ast->name);
+                       return -1;
+               }
+               switch(p->sig) {
+               case SIG_FXOGS:
+               case SIG_FXOLS:
+               case SIG_FXOKS:
+                       res = ioctl(zap_fd(p->z), ZT_GET_PARAMS, &par);
+                       if (!res) {
+#if 0
+                               ast_log(LOG_DEBUG, "Hanging up channel %d, offhook = %d\n", p->channel, par.rxisoffhook);
+#endif
+                               /* If they're off hook, try playing congestion */
+                               if (par.rxisoffhook)
+                                       tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                               else
+                                       tone_zone_play_tone(zap_fd(p->z), -1);
+                       }
+                       break;
+               default:
+                       tone_zone_play_tone(zap_fd(p->z), -1);
+               }
+               if (index > -1) {
+                       p->needringing[index] = 0;
+                       p->needanswer[index] = 0;
+               }
+               if (p->cidspill)
+                       free(p->cidspill);
+               zt_disable_ec(p);
+               x = 0;
+               ast_channel_setoption(ast,AST_OPTION_TONE_VERIFY,&x,sizeof(char),0);
+               p->cidspill = NULL;
+               p->callwaitcas = 0;
+               p->callwaiting = p->permcallwaiting;
+               p->hidecallerid = p->permhidecallerid;
+               p->dialing = 0;
+               conf_clear(p);
+               unalloc_pseudo(p);
+               restart_monitor();
+       }
+       p->callwaitingrepeat = 0;
+       ast->pvt->pvt = NULL;
+       ast->state = AST_STATE_DOWN;
+       ast_pthread_mutex_lock(&usecnt_lock);
+       usecnt--;
+       if (usecnt < 0) 
+               ast_log(LOG_WARNING, "Usecnt < 0???\n");
+       ast_pthread_mutex_unlock(&usecnt_lock);
+       ast_update_use_count();
+       if (option_verbose > 2) 
+               ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
+
+       tmp = iflist;
+       prev = NULL;
+       if (p->destroy) {
+               while (tmp) {
+                       if (tmp->channel == p->channel) {
+                               destroy_channel(prev, tmp, 0);
+                               break;
+                       } else {
+                               prev = tmp;
+                               tmp = tmp->next;
+                       }
+               }
+       }
+
+       return 0;
+}
+
+static int zt_answer(struct ast_channel *ast)
+{
+       struct zt_pvt *p = ast->pvt->pvt;
+       int res=0;
+       ast->state = AST_STATE_UP;
+       switch(p->sig) {
+       case SIG_FXSLS:
+       case SIG_FXSGS:
+       case SIG_FXSKS:
+               p->ringt = 0;
+               /* Fall through */
+       case SIG_EM:
+       case SIG_EMWINK:
+       case SIG_FEATD:
+       case SIG_FXOLS:
+       case SIG_FXOGS:
+       case SIG_FXOKS:
+               /* Pick up the line */
+               ast_log(LOG_DEBUG, "Took %s off hook\n", ast->name);
+               res =  zt_set_hook(zap_fd(p->z), ZT_OFFHOOK);
+               tone_zone_play_tone(zap_fd(p->z), -1);
+               if (INTHREEWAY(p))
+                       tone_zone_play_tone(zap_fd(p->pseudo), -1);
+               p->dialing = 0;
+               break;
+#ifdef ZAPATA_PRI
+       case SIG_PRI:
+               /* Send a pri acknowledge */
+               if (!pri_grab(p->pri)) {
+                       res = pri_answer(p->pri->pri, p->call, 0, 1);
+                       pri_rel(p->pri);
+               } else {
+                       ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
+                       res= -1;
+               }
+               break;
+#endif         
+       default:
+               ast_log(LOG_WARNING, "Don't know how to answer signalling %d (channel %d)\n", p->sig, p->channel);
+               return -1;
+       }
+       return res;
+}
+
+static inline int bridge_cleanup(struct zt_pvt *p0, struct zt_pvt *p1)
+{
+       int res;
+       res = conf_clear(p0);
+       res |= conf_clear(p1);
+       return res;
+}
+
+static int zt_setoption(struct ast_channel *chan, int option, void *data, int datalen)
+{
+char   *cp;
+
+       struct zt_pvt *p = chan->pvt->pvt;
+
+       if (option != AST_OPTION_TONE_VERIFY) 
+          {
+               errno = ENOSYS;
+               return -1;
+          }
+       cp = (char *)data;
+       if ((!cp) || (datalen < 1))
+          {
+               errno = EINVAL;
+               return -1;
+          }
+       switch(*cp) {
+           case 1:
+               ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF(1) on %s\n",chan->name);
+               zap_digitmode(p->z,ZAP_MUTECONF);  /* set mute mode if desired */
+               break;
+           case 2:
+               ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF/MAX(2) on %s\n",chan->name);
+               zap_digitmode(p->z,ZAP_MUTECONF | ZAP_MUTEMAX);  /* set mute mode if desired */
+               break;
+           default:
+               ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: OFF(0) on %s\n",chan->name);
+               zap_digitmode(p->z,0);  /* set mute mode if desired */
+               break;
+       }
+       errno = 0;
+       return 0;
+}
+
+static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
+{
+       /* Do a quickie conference between the two channels and wait for something to happen */
+       struct zt_pvt *p0 = c0->pvt->pvt;
+       struct zt_pvt *p1 = c1->pvt->pvt;
+       struct ast_channel *who = NULL, *cs[3];
+       struct ast_frame *f;
+       int to = -1;
+       
+       int confno = -1;
+       
+         /* if need DTMF, cant native bridge */
+       if (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))
+               return -2;
+         /* if cant run clear DTMF, cant native bridge */
+       pthread_mutex_lock(&c0->lock);
+       pthread_mutex_lock(&c1->lock);
+       if (!CLEARDTMF(c0) || !CLEARDTMF(c1)) {
+               pthread_mutex_unlock(&c1->lock);
+               pthread_mutex_unlock(&c0->lock);
+               return -3;
+       }
+       p0 = c0->pvt->pvt;
+       p1 = c1->pvt->pvt;
+       if (c0->type == type)
+               /* Stop any playing tones */
+               tone_zone_play_tone(zap_fd(p0->z),      -1);
+       if (c1->type == type)
+               tone_zone_play_tone(zap_fd(p1->z),      -1);
+       pthread_mutex_unlock(&c1->lock);
+       pthread_mutex_unlock(&c0->lock);
+
+       cs[0] = c0;
+       cs[1] = c1;
+       for (;;) {
+               pthread_mutex_lock(&c0->lock);
+               pthread_mutex_lock(&c1->lock);
+               p0 = c0->pvt->pvt;
+               p1 = c1->pvt->pvt;
+
+               /* Stop if we're a zombie or need a soft hangup */
+               if (c0->zombie || c0->softhangup || c1->zombie || c1->softhangup) {
+                       *fo = NULL;
+                       if (who) *rc = who;
+                       bridge_cleanup(p0, p1);
+                       pthread_mutex_unlock(&c0->lock);
+                       pthread_mutex_unlock(&c1->lock);
+                       return 0;
+               }
+               if (!p0 || !p1 || (c0->type != type) || (c1->type != type)) {
+                       pthread_mutex_unlock(&c0->lock);
+                       pthread_mutex_unlock(&c1->lock);
+                       return -2;
+               }
+
+               if (INTHREEWAY(p0) && (c0 == p0->owners[p0->thirdcallindex]))
+                       tone_zone_play_tone(zap_fd(p0->pseudo), -1);
+               if (INTHREEWAY(p1) && (c1 == p1->owners[p1->thirdcallindex]))
+                       tone_zone_play_tone(zap_fd(p1->pseudo), -1);
+               if (INTHREEWAY(p0) && (INTHREEWAY(p1))) {
+                       ast_log(LOG_WARNING, "Too weird, can't bridge multiple three way calls\n");
+                       pthread_mutex_unlock(&c0->lock);
+                       pthread_mutex_unlock(&c1->lock);
+                       return -1;
+               }
+               if ((p0->owner == c0) && (p1->owner == c1)) {
+                       /* Okay, this call should actually be connected */
+                       if ((p0->confno > -1) && (p1->confno > -1) && (p0->confno != p1->confno)) {
+                               /* We have a conflict here.  Try to resolve it. */
+                               if ((INTHREEWAY(p0) && (c0 == p0->owners[p0->normalindex]))) {
+                                       ast_log(LOG_DEBUG, "Channel %s is in a three way call with us, moving to our conference %d\n",
+                                               c1->name, p0->confno);
+                                       conf_set(p1, p0->confno, 1);
+                               } else if (INTHREEWAY(p1) && (c1 == p1->owners[p1->normalindex])) {
+                                               ast_log(LOG_DEBUG, "Channel %s is in a three way call with us, moving to our conference %d\n",
+                                                       c0->name, p1->confno);
+                                               conf_set(p0, p1->confno, 1);
+                               } else {
+                                       ast_log(LOG_WARNING, "Can't bridge since %s is on conf %d and %s is on conf %d\n",
+                                               c0->name, p0->confno, c1->name, p1->confno);
+                                       pthread_mutex_unlock(&c0->lock);
+                                       pthread_mutex_unlock(&c1->lock);
+                                       return -1;
+                               }
+                       }
+                       if (p0->confno > -1)
+                               confno = p0->confno;
+                       else
+                               confno = p1->confno;
+                       if (confno < 0) {
+                               conf_set(p0, -1, 0);
+                               confno = p0->confno;
+                               ast_log(LOG_DEBUG, "Creating new conference %d for %s\n", confno, c0->name);
+                       }
+                       if (p0->confno != confno) {
+                               ast_log(LOG_DEBUG, "Placing %s in conference %d\n", c0->name, confno);
+                               conf_set(p0, confno, 0);
+                       }
+                       if (p1->confno != confno) {
+                               ast_log(LOG_DEBUG, "Placing %s in conference %d\n", c1->name, confno);
+                               conf_set(p1, confno, 0);
+                       }
+               } else if (INTHREEWAY(p0) && (c0 == p0->owners[p0->thirdcallindex])) {
+                       /* p0 is in a three way call and we're the third leg.  Join their
+                          conference, already in progress if there is one */
+                       if ((p0->confno > -1) && (p1->confno != p0->confno)) {
+                               confno = p0->confno;
+                               ast_log(LOG_DEBUG, "Placing %s in conference %d\n", c1->name, confno);
+                               conf_set(p1, confno, 0);
+                       }
+               } else if (INTHREEWAY(p1) && (c1 == p1->owners[p1->thirdcallindex])) {
+                       /* p0 is in a three way call and we're the third leg.  Join their
+                          conference, already in progress if there is one */
+                       if ((p1->confno > -1) && (p1->confno != p0->confno)) {
+                               confno = p0->confno;
+                               ast_log(LOG_DEBUG, "Placing %s in conference %d\n", c0->name, confno);
+                               conf_set(p0, confno, 0);
+                       }
+               }
+               pthread_mutex_unlock(&c0->lock);
+               pthread_mutex_unlock(&c1->lock);
+               
+               who = ast_waitfor_n(cs, 2, &to);
+               if (!who) {
+                       ast_log(LOG_WARNING, "Nobody there??\n");
+                       continue;
+               }
+                 /* if gone out of CLEAR DTMF mode */
+               if (!CLEARDTMF(c0) || !CLEARDTMF(c1)) {
+                       *fo = NULL;
+                       *rc = who;
+                       bridge_cleanup(p0, p1);
+                       return -3;
+               }
+               if (who == c0)
+                       p0->ignoredtmf = 1;
+               else
+                       p1->ignoredtmf = 1;
+               f = ast_read(who);
+               if (who == c0)
+                       p0->ignoredtmf = 0;
+               else
+                       p1->ignoredtmf = 0;
+               if (!f) {
+                       *fo = NULL;
+                       *rc = who;
+                       bridge_cleanup(p0, p1);
+                       return 0;
+               }
+               if ((f->frametype == AST_FRAME_CONTROL) && !(flags & AST_BRIDGE_IGNORE_SIGS)) {
+                       *fo = f;
+                       *rc = who;
+                       bridge_cleanup(p0, p1);
+                       return 0;
+               }
+               if ((f->frametype == AST_FRAME_VOICE) ||
+                       (f->frametype == AST_FRAME_TEXT) ||
+                       (f->frametype == AST_FRAME_VIDEO) || 
+                       (f->frametype == AST_FRAME_IMAGE) ||
+                       (f->frametype == AST_FRAME_DTMF)) {
+                       if ((f->frametype == AST_FRAME_DTMF) && (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))) {
+                               if ((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) {
+                                       *rc = c0;
+                                       *fo = f;
+                                       bridge_cleanup(p0, p1);
+                                       return 0;
+                               } else
+                               if ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1)) {
+                                       *rc = c1;
+                                       *fo = f;
+                                       bridge_cleanup(p0, p1);
+                                       return 0;
+                               }
+                       }
+                       ast_frfree(f);
+               } else
+                       ast_frfree(f);
+               /* Swap who gets priority */
+               cs[2] = cs[0];
+               cs[0] = cs[1];
+               cs[1] = cs[2];
+       }
+       return 0;
+}
+
+static int zt_indicate(struct ast_channel *chan, int condition);
+
+static int zt_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
+{
+       struct zt_pvt *p = newchan->pvt->pvt;
+       int x;
+       ast_log(LOG_DEBUG, "New owner for channel %d is %s\n", p->channel, newchan->name);
+       p->owner = newchan;
+       for (x=0;x<3;x++)
+               if (p->owners[x] == oldchan)
+                       p->owners[x] = newchan;
+       if (newchan->state == AST_STATE_RINGING) 
+               zt_indicate(newchan, AST_CONTROL_RINGING);
+       return 0;
+}
+
+static int zt_ring_phone(struct zt_pvt *p)
+{
+       int x;
+       int res;
+       /* Make sure our transmit state is on hook */
+       x = 0;
+       x = ZT_ONHOOK;
+       res = ioctl(zap_fd(p->z), ZT_HOOK, &x);
+       do {
+               x = ZT_RING;
+               res = ioctl(zap_fd(p->z), ZT_HOOK, &x);
+#if 0
+               printf("Res: %d, error: %s\n", res, strerror(errno));
+#endif                                         
+               if (res) {
+                       switch(errno) {
+                       case EBUSY:
+                       case EINTR:
+                               /* Wait just in case */
+                               usleep(10000);
+                               continue;
+                       case EINPROGRESS:
+                               res = 0;
+                               break;
+                       default:
+                               ast_log(LOG_WARNING, "Couldn't ring the phone: %s\n", strerror(errno));
+                               res = 0;
+                       }
+               }
+       } while (res);
+       return res;
+}
+
+static void *ss_thread(void *data);
+
+static struct ast_channel *zt_new(struct zt_pvt *, int, int, int, int);
+
+static int attempt_transfer(struct zt_pvt *p)
+{
+       /* In order to transfer, we need at least one of the channels to
+          actually be in a call bridge.  We can't conference two applications
+          together (but then, why would we want to?) */
+       if (p->owners[p->normalindex]->bridge) {
+               if (ast_channel_masquerade(p->owners[p->thirdcallindex], p->owners[p->normalindex]->bridge)) {
+                       ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
+                                       p->owners[p->normalindex]->bridge->name, p->owners[p->thirdcallindex]->name);
+                       return -1;
+               }
+               /* Orphan the channel */
+               p->owners[p->thirdcallindex] = NULL;
+               p->thirdcallindex = -1;
+       } else if (p->owners[p->thirdcallindex]->bridge) {
+               if (ast_channel_masquerade(p->owners[p->normalindex], p->owners[p->thirdcallindex]->bridge)) {
+                       ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
+                               p->owners[p->thirdcallindex]->bridge->name, p->owners[p->normalindex]->name);
+                       return -1;
+               }
+               /* Orphan the normal channel */
+               p->owners[p->normalindex] = NULL;
+               p->normalindex = p->thirdcallindex;
+               p->thirdcallindex = -1;
+       } else {
+               ast_log(LOG_DEBUG, "Neither %s nor %s are in a bridge, nothing to transfer\n",
+                                       p->owners[p->normalindex]->name, p->owners[p->thirdcallindex]->name);
+               p->owners[p->thirdcallindex]->softhangup=1;
+       }
+       return 0;
+}
+
+struct ast_frame *zt_handle_event(struct ast_channel *ast)
+{
+       int res,x;
+       int index;
+       struct zt_pvt *p = ast->pvt->pvt;
+       pthread_t threadid;
+       pthread_attr_t attr;
+       struct ast_channel *chan;
+       pthread_attr_init(&attr);
+       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+       index = zt_get_index(ast, p, 0);
+       p->f[index].frametype = AST_FRAME_NULL;
+       p->f[index].datalen = 0;
+       p->f[index].timelen = 0;
+       p->f[index].mallocd = 0;
+       p->f[index].offset = 0;
+       p->f[index].src = "zt_handle_event";
+       p->f[index].data = NULL;
+       if (index < 0)
+               return &p->f[index];
+       res = zt_get_event(zap_fd(p->z));
+       ast_log(LOG_DEBUG, "Got event %s(%d) on channel %d (index %d)\n", event2str(res), res, p->channel, index);
+       switch(res) {
+               case ZT_EVENT_DIALCOMPLETE:
+                       if (p->inalarm) break;
+                       if (ioctl(zap_fd(p->z),ZT_DIALING,&x) == -1) {
+                               ast_log(LOG_DEBUG, "ZT_DIALING ioctl failed on %s\n",ast->name);
+                               return NULL;
+                       }
+                       if (!x) /* if not still dialing in driver */
+                          {
+                               zt_enable_ec(p);
+                               p->dialing = 0;
+                               if (ast->state == AST_STATE_DIALING) {
+#if 0
+                                       ast->state = AST_STATE_RINGING;
+#else
+                                       ast->state = AST_STATE_UP;
+                                       p->f[index].frametype = AST_FRAME_CONTROL;
+                                       p->f[index].subclass = AST_CONTROL_ANSWER;
+#endif                         
+                               }
+                       }
+                       break;
+               case ZT_EVENT_ALARM:
+                       p->inalarm = 1;
+                       /* fall through intentionally */
+               case ZT_EVENT_ONHOOK:
+                       switch(p->sig) {
+                       case SIG_FXOLS:
+                       case SIG_FXOGS:
+                       case SIG_FXOKS:
+                               /* Check for some special conditions regarding call waiting */
+                               if (index == p->normalindex) {
+                                       /* The normal line was hung up */
+                                       if (p->callwaitindex > -1) {
+                                               bridge_cleanup(p->owners[p->normalindex]->pvt->pvt,
+                                                   p->owners[p->callwaitindex]->pvt->pvt);
+                                               /* There's a call waiting call, so ring the phone */
+                                               p->owner = p->owners[p->callwaitindex];
+                                               if (option_verbose > 2) 
+                                                       ast_verbose(VERBOSE_PREFIX_3 "Channel %s still has (callwait) call, ringing phone\n", p->owner);
+                                               p->needanswer[index] = 0;
+                                               p->needringing[index] = 0;
+                                               p->callwaitingrepeat = 0;
+                                               zt_ring_phone(p);
+                                       } else if (p->thirdcallindex > -1) {
+                                               if (p->transfer) {
+                                                       if (attempt_transfer(p))
+                                                               p->owners[p->thirdcallindex]->softhangup = 1;
+                                               } else
+                                                       p->owners[p->thirdcallindex]->softhangup=1;
+                                       }
+                               } else if (index == p->callwaitindex) {
+                                       /* Check to see if there is a normal call */
+                                       if (p->normalindex > -1) {
+                                               bridge_cleanup(p->owners[p->normalindex]->pvt->pvt,
+                                                   p->owners[p->callwaitindex]->pvt->pvt);
+                                               /* There's a call waiting call, so ring the phone */
+                                               p->owner = p->owners[p->normalindex];
+                                               if (option_verbose > 2) 
+                                                       ast_verbose(VERBOSE_PREFIX_3 "Channel %s still has (normal) call, ringing phone\n", p->owner);
+                                               p->needanswer[index] = 0;
+                                               p->needringing[index] = 0;
+                                               p->callwaitingrepeat = 0;
+                                               zt_ring_phone(p);
+                                       }
+                               } else if (index == p->thirdcallindex) {
+                                       if ((ast->state != AST_STATE_UP) && (ast->state != AST_STATE_RINGING) &&
+                                                       (ast->state != AST_STATE_RING)) {
+                                               /* According to the LSSGR, we should kill everything now, and we 
+                                                  do, instead of ringing the phone */
+                                               if (p->normalindex > -1) 
+                                                       p->owners[p->normalindex]->softhangup=1;
+                                               if (p->callwaitindex > -1) {
+                                                       ast_log(LOG_WARNING, "Somehow there was a call wait\n");
+                                                       p->owners[p->callwaitindex]->softhangup = 1;
+                                               }
+                                               
+                                       } else {
+                                               if (p->transfer) {
+                                                       if (attempt_transfer(p))
+                                                               p->owners[p->normalindex]->softhangup = 1;
+                                                       else {
+                                                               /* Don't actually hangup.  We're going to get transferred */
+                                                               zt_disable_ec(p);
+                                                               break;
+                                                       }
+                                               } else 
+                                                       p->owners[p->normalindex]->softhangup = 1;
+                                       }
+                               }
+                               /* Fall through */
+                       default:
+                               zt_disable_ec(p);
+                               return NULL;
+                       }
+                       break;
+               case ZT_EVENT_RINGOFFHOOK:
+                       if (p->inalarm) break;
+                       switch(p->sig) {
+                       case SIG_FXOLS:
+                       case SIG_FXOGS:
+                       case SIG_FXOKS:
+                               switch(ast->state) {
+                               case AST_STATE_RINGING:
+                                       zt_enable_ec(p);
+                                       ast->state = AST_STATE_UP;
+                                       p->f[index].frametype = AST_FRAME_CONTROL;
+                                       p->f[index].subclass = AST_CONTROL_ANSWER;
+                                       /* Make sure it stops ringing */
+                                       zt_set_hook(zap_fd(p->z), ZT_OFFHOOK);
+                                       ast_log(LOG_DEBUG, "channel %d answered\n", p->channel);
+                                       if (p->cidspill) {
+                                               /* Cancel any running CallerID spill */
+                                               free(p->cidspill);
+                                               p->cidspill = NULL;
+                                       }
+                                       p->dialing = 0;
+                                       return &p->f[index];
+                               case AST_STATE_DOWN:
+                                       ast->state = AST_STATE_RING;
+                                       ast->rings = 1;
+                                       p->f[index].frametype = AST_FRAME_CONTROL;
+                                       p->f[index].subclass = AST_CONTROL_OFFHOOK;
+                                       ast_log(LOG_DEBUG, "channel %d picked up\n", p->channel);
+                                       return &p->f[index];
+                               case AST_STATE_UP:
+                                       /* Make sure it stops ringing */
+                                       zt_set_hook(zap_fd(p->z), ZT_OFFHOOK);
+                                       /* Okay -- probably call waiting*/
+                                       break;
+                               default:
+                                       ast_log(LOG_WARNING, "FXO phone off hook in weird state %d??\n", ast->state);
+                               }
+                               break;
+                       case SIG_FXSLS:
+                       case SIG_FXSGS:
+                       case SIG_FXSKS:
+                               if (ast->state == AST_STATE_RING) {
+                                       p->ringt = RINGT;
+                               }
+                               /* Fall through */
+                       case SIG_EM:
+                       case SIG_EMWINK:
+                       case SIG_FEATD:
+                               if (ast->state == AST_STATE_DOWN) {
+                                       if (option_debug)
+                                               ast_log(LOG_DEBUG, "Ring detected\n");
+                                       p->f[index].frametype = AST_FRAME_CONTROL;
+                                       p->f[index].subclass = AST_CONTROL_RING;
+                               } else if (ast->state == AST_STATE_RINGING) {
+                                       if (option_debug)
+                                               ast_log(LOG_DEBUG, "Line answered\n");
+                                       p->f[index].frametype = AST_FRAME_CONTROL;
+                                       p->f[index].subclass = AST_CONTROL_ANSWER;
+                                       ast->state = AST_STATE_UP;
+                               } else if (ast->state != AST_STATE_RING)
+                                       ast_log(LOG_WARNING, "Ring/Off-hook in strange state %d on channel %d\n", ast->state, p->channel);
+                               break;
+                       default:
+                               ast_log(LOG_WARNING, "Don't know how to handle ring/off hoook for signalling %d\n", p->sig);
+                       }
+                       break;
+               case ZT_EVENT_RINGEROFF:
+                       if (p->inalarm) break;
+                       ast->rings++;
+                       if ((ast->rings > 1) && (p->cidspill)) {
+                               ast_log(LOG_WARNING, "Didn't finish Caller-ID spill.  Cancelling.\n");
+                               free(p->cidspill);
+                               p->cidspill = NULL;
+                               p->callwaitcas = 0;
+                       }
+                       p->f[index].frametype = AST_FRAME_CONTROL;
+                       p->f[index].subclass = AST_CONTROL_RINGING;
+                       break;
+               case ZT_EVENT_RINGERON:
+                       break;
+               case ZT_EVENT_NOALARM:
+                       p->inalarm = 0;
+                       break;
+               case ZT_EVENT_WINKFLASH:
+                       if (p->inalarm) break;
+                       switch(p->sig) {
+                       case SIG_FXOLS:
+                       case SIG_FXOGS:
+                       case SIG_FXOKS:
+                               ast_log(LOG_DEBUG, "Winkflash, index: %d, normal: %d, callwait: %d, thirdcall: %d\n",
+                                       index, p->normalindex, p->callwaitindex, p->thirdcallindex);
+                               if (index == p->normalindex) {
+                                       if (p->callwaitindex > -1) {
+                                               tone_zone_play_tone(zap_fd(p->z), -1);
+                                               p->owner = p->owners[p->callwaitindex];
+                                               if (p->owner->state == AST_STATE_RINGING) {
+                                                       p->owner->state = AST_STATE_UP;
+                                                       p->needanswer[p->callwaitindex] = 1;
+                                               }
+                                               p->callwaitingrepeat = 0;
+                                               conf_clear(p);
+                                       } else if (p->thirdcallindex == -1) {
+                                               if (p->threewaycalling) {
+                                                       if ((ast->state == AST_STATE_RINGING) ||
+                                                                       (ast->state == AST_STATE_UP) ||
+                                                                       (ast->state == AST_STATE_RING)) {
+                                                               if (!alloc_pseudo(p)) {
+                                                                       /* Start three way call */
+                                                                       res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_DIALRECALL);
+                                                                       if (res)
+                                                                               ast_log(LOG_WARNING, "Unable to start dial recall tone on channel %d\n", p->channel);
+                                                                       chan = zt_new(p, AST_STATE_RESERVED,0,0,1);
+                                                                       p->owner = chan;
+                                                                       if (pthread_create(&threadid, &attr, ss_thread, chan)) {
+                                                                               ast_log(LOG_WARNING, "Unable to start simple switch on channel %d\n", p->channel);
+                                                                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                                                                               ast_hangup(chan);
+                                                                       } else {
+                                                                               if (option_verbose > 2) 
+                                                                                       ast_verbose(VERBOSE_PREFIX_3 "Started three way call on channel %d (index %d)\n", p->channel, p->thirdcallindex);
+                                                                               conf_clear(p);
+                                                                       }               
+                                                               } else
+                                                                       ast_log(LOG_WARNING, "Unable to allocate pseudo channel\n");
+                                                       } else 
+                                                               ast_log(LOG_DEBUG, "Flash when call not up or ringing\n");
+                                               }
+                                       } else {
+                                               if (option_debug)
+                                                       ast_log(LOG_DEBUG, "Got flash with three way call up, dropping last call %d\n",
+                                                               p->thirdcallindex);
+                                               /* Drop the last call and stop the conference */
+                                               if (option_verbose > 2)
+                                                       ast_verbose(VERBOSE_PREFIX_3 "Dropping three-way call on %s\n", p->owners[p->thirdcallindex]->name);
+                                               p->owners[p->thirdcallindex]->softhangup=1;
+                                               conf_clear(p);
+                                       }
+                               } else if (index == p->callwaitindex) {
+                                       if (p->normalindex > -1) {
+                                               p->owner = p->owners[p->normalindex];
+                                               p->callwaitingrepeat = 0;
+                                               conf_clear(p);
+                                       } else
+                                               ast_log(LOG_WARNING, "Wink/Flash on call wait, with no normal channel to flash to on channel %d?\n", p->channel);
+                               } else if (index == p->thirdcallindex) {
+                                       if (p->normalindex > -1) {
+                                               if ((ast->state != AST_STATE_RINGING) && (ast->state != AST_STATE_UP) && (ast->state != AST_STATE_RING)) {
+                                                       tone_zone_play_tone(zap_fd(p->z), -1);
+                                                       p->owner = p->owners[p->normalindex];
+                                                       ast_log(LOG_DEBUG, "Dumping incomplete three way call in state %d\n", ast->state);
+                                                       return NULL;
+                                               }
+                                               p->owner = p->owners[p->normalindex];
+                                               p->owners[p->thirdcallindex]->fds[0] = zap_fd(p->pseudo);
+                                               p->callwaitingrepeat = 0;
+                                               if (p->owners[p->thirdcallindex]->state == AST_STATE_RINGING) {
+                                                       /* If we were ringing, stop the ringing on the main line and start it on
+                                                          the pseudo */
+                                                       tone_zone_play_tone(zap_fd(p->z), -1);
+                                                       tone_zone_play_tone(zap_fd(p->pseudo), ZT_TONE_RINGTONE);
+                                               }
+                                               three_way(p);
+                                               if (option_verbose > 2)
+                                                       ast_verbose(VERBOSE_PREFIX_3 "Established 3-way conference between %s and %s\n", 
+                                                                               p->owners[p->normalindex]->name, p->owners[p->thirdcallindex]->name);
+                                       } else {
+                                               ast_log(LOG_WARNING, "Wink/Flash on threeway call, with no normal channel to flash to on channel %d?\n", p->channel);
+                                               return NULL;
+                                       }
+                               }
+                               break;
+                       case SIG_EM:
+                       case SIG_EMWINK:
+                       case SIG_FEATD:
+                       case SIG_FXSLS:
+                       case SIG_FXSGS:
+                               if (p->dialing)
+                                       ast_log(LOG_DEBUG, "Ignoring wink on channel %d\n", p->channel);
+                               else
+                                       ast_log(LOG_DEBUG, "Got wink in weird state %d on channel %d\n", ast->state, p->channel);
+                               break;
+                       default:
+                               ast_log(LOG_WARNING, "Don't know how to handle ring/off hoook for signalling %d\n", p->sig);
+                       }
+                       break;
+               case ZT_EVENT_HOOKCOMPLETE:
+                       if (p->inalarm) break;
+                       switch(p->sig) {
+                       case SIG_FXSLS:  /* only interesting for FXS */
+                       case SIG_FXSGS:
+                       case SIG_FXSKS:
+                       case SIG_EM:
+                       case SIG_EMWINK:
+                               res = ioctl(zap_fd(p->z), ZT_DIAL, &p->dop);
+                               if (res < 0) {
+                                       ast_log(LOG_WARNING, "Unable to initiate dialing on trunk channel %d\n", p->channel);
+                                       p->dop.dialstr[0] = '\0';
+                                       return NULL;
+                               } else 
+                                       ast_log(LOG_DEBUG, "Sent deferred digit string: %s\n", p->dop.dialstr);
+                               p->dop.dialstr[0] = '\0';
+                               break;
+                       default:
+                               break;
+                       }
+                       break;
+               default:
+                       ast_log(LOG_DEBUG, "Dunno what to do with event %d on channel %d\n", res, p->channel);
+       }
+       return &p->f[index];
+ }
+
+struct ast_frame *zt_exception(struct ast_channel *ast)
+{
+       struct zt_pvt *p = ast->pvt->pvt;
+       int res;
+       int usedindex=-1;
+       int index;
+       
+       index = zt_get_index(ast, p, 1);
+       
+       p->f[index].frametype = AST_FRAME_NULL;
+       p->f[index].datalen = 0;
+       p->f[index].timelen = 0;
+       p->f[index].mallocd = 0;
+       p->f[index].offset = 0;
+       p->f[index].subclass = 0;
+       p->f[index].src = "zt_exception";
+       p->f[index].data = NULL;
+               
+       if ((p->owner != p->owners[0]) && 
+           (p->owner != p->owners[1]) &&
+               (p->owner != p->owners[2])) {
+               /* If nobody owns us, absorb the event appropriately, otherwise
+                  we loop indefinitely.  This occurs when, during call waiting, the
+                  other end hangs up our channel so that it no longer exists, but we
+                  have neither FLASH'd nor ONHOOK'd to signify our desire to
+                  change to the other channel. */
+               res = zt_get_event(zap_fd(p->z));
+               if ((p->callwaitindex > -1) && (p->normalindex > -1)) 
+                       ast_log(LOG_WARNING, "Absorbing exception on unowned channel, but there is both a normal and call waiting call still here?\n");
+               if (p->callwaitindex > -1) {
+                       tone_zone_play_tone(zap_fd(p->z), -1);
+                       p->owner = p->owners[p->callwaitindex];
+                       usedindex = p->callwaitindex;
+               } else if (p->normalindex > -1) {
+                       tone_zone_play_tone(zap_fd(p->z), -1);
+                       p->owner = p->owners[p->normalindex];
+                       usedindex = p->normalindex;
+               } else {
+                       ast_log(LOG_WARNING, "No call wait call, no normal call, what do I do?\n");
+                       return NULL;
+               }
+               switch(res) {
+               case ZT_EVENT_ONHOOK:
+                       zt_disable_ec(p);
+                       if (p->owner) {
+                               if (option_verbose > 2) 
+                                       ast_verbose(VERBOSE_PREFIX_3 "Channel %s still has call, ringing phone\n", p->owner->name);
+                               zt_ring_phone(p);
+                               p->callwaitingrepeat = 0;
+                       } else
+                               ast_log(LOG_WARNING, "Absorbed on hook, but nobody is left!?!?\n");
+                       break;
+               case ZT_EVENT_WINKFLASH:
+                       if (p->owner) {
+                               if (option_verbose > 2) 
+                                       ast_verbose(VERBOSE_PREFIX_3 "Channel %d flashed to other channel %s\n", p->channel, p->owner->name);
+                               if ((usedindex == p->callwaitindex) && (p->owner->state == AST_STATE_RINGING)) {
+                                       /* Answer the call wait if necessary */
+                                       p->needanswer[usedindex] = 1;
+                                       p->owner->state = AST_STATE_UP;
+                               }
+                               p->callwaitingrepeat = 0;
+                       } else
+                               ast_log(LOG_WARNING, "Absorbed on hook, but nobody is left!?!?\n");
+                       break;
+               default:
+                       ast_log(LOG_WARNING, "Don't know how to absorb event %s\n", event2str(res));
+               }
+               return &p->f[index];
+       }
+       /* If it's not us, return NULL immediately */
+       if (ast != p->owner)
+               return &p->f[index];
+
+       return zt_handle_event(ast);
+}
+
+struct ast_frame  *zt_read(struct ast_channel *ast)
+{
+       struct zt_pvt *p = ast->pvt->pvt;
+       int res,x;
+       int index;
+       unsigned char ireadbuf[READ_SIZE];
+       unsigned char *readbuf;
+       ZAP *z = NULL;
+       
+       pthread_mutex_lock(&p->lock);
+       
+       index = zt_get_index(ast, p, 0);
+       
+       p->f[index].frametype = AST_FRAME_NULL;
+       p->f[index].datalen = 0;
+       p->f[index].timelen = 0;
+       p->f[index].mallocd = 0;
+       p->f[index].offset = 0;
+       p->f[index].subclass = 0;
+       p->f[index].src = "zt_read";
+       p->f[index].data = NULL;
+       
+       /* Hang up if we don't really exist */
+       if (index < 0)  {
+               ast_log(LOG_WARNING, "We dont exist?\n");
+               pthread_mutex_unlock(&p->lock);
+               return NULL;
+       }
+       
+       if (p->ringt == 1) {
+               pthread_mutex_unlock(&p->lock);
+               return NULL;
+       }
+       else if (p->ringt > 0) 
+               p->ringt--;
+
+       if (p->needringing[index]) {
+               /* Send ringing frame if requested */
+               p->needringing[index] = 0;
+               p->f[index].frametype = AST_FRAME_CONTROL;
+               p->f[index].subclass = AST_CONTROL_RINGING;
+               pthread_mutex_unlock(&p->lock);
+               return &p->f[index];
+       }       
+       
+       if (p->needanswer[index]) {
+               /* Send ringing frame if requested */
+               p->needanswer[index] = 0;
+               p->f[index].frametype = AST_FRAME_CONTROL;
+               p->f[index].subclass = AST_CONTROL_ANSWER;
+               pthread_mutex_unlock(&p->lock);
+               return &p->f[index];
+       }       
+       
+       if (ast != p->owner) {
+               /* If it's not us.  If this isn't a three way call, return immediately */
+               if (!INTHREEWAY(p)) {
+                       pthread_mutex_unlock(&p->lock);
+                       return &p->f[index];
+               }
+               /* If it's not the third call, return immediately */
+               if (ast != p->owners[p->thirdcallindex]) {
+                       pthread_mutex_unlock(&p->lock);
+                       return &p->f[index];
+               }
+               if (!p->pseudo) 
+                       ast_log(LOG_ERROR, "No pseudo channel\n");
+               z = p->pseudo;          
+       } else
+               z = p->z;
+
+       if (!z) {
+               ast_log(LOG_WARNING, "No zap structure?!?\n");
+               pthread_mutex_unlock(&p->lock);
+               return NULL;
+       }
+       
+       /* Check first for any outstanding DTMF characters */
+       if (strlen(p->dtmfq)) {
+               p->f[index].subclass = p->dtmfq[0];
+               memmove(p->dtmfq, p->dtmfq + 1, sizeof(p->dtmfq) - 1);
+               p->f[index].frametype = AST_FRAME_DTMF;
+               pthread_mutex_unlock(&p->lock);
+               return &p->f[index];
+       }
+       
+       if (ast->pvt->rawreadformat == AST_FORMAT_SLINEAR) {
+               /* Read into temporary buffer */
+               readbuf = ireadbuf;
+       } else if (ast->pvt->rawreadformat == AST_FORMAT_ULAW) {
+               /* Read ulaw directly into frame */
+               readbuf = ((unsigned char *)p->buffer[index]) + AST_FRIENDLY_OFFSET;
+       } else {
+               ast_log(LOG_WARNING, "Don't know how to read frames in format %d\n", ast->pvt->rawreadformat);
+               pthread_mutex_unlock(&p->lock);
+               return NULL;
+       }
+       CHECK_BLOCKING(ast);
+       if ((z != p->z) && (z != p->pseudo)) {
+               pthread_mutex_unlock(&p->lock);
+               return NULL;
+       }
+       res = zap_recchunk(z, readbuf, READ_SIZE, ((p->ignoredtmf) ? 0 : ZAP_DTMFINT));
+       ast->blocking = 0;
+       /* Check for hangup */
+       if (res < 0) {
+               if (res == -1) 
+                       ast_log(LOG_WARNING, "zt_rec: %s\n", strerror(errno));
+               pthread_mutex_unlock(&p->lock);
+               return NULL;
+       }
+       if (res != READ_SIZE) {
+               if (option_debug)
+                       ast_log(LOG_DEBUG, "Short read, must be DTMF or something...\n");
+               /* XXX UGLY!!  Zapata's DTMF handling is a bit ugly XXX */
+               if (zap_dtmfwaiting(z) && !strlen(zap_dtmfbuf(z))) {
+                       zap_getdtmf(z, 1, NULL, 0, 1, 1, 0);
+               }
+               if (strlen(zap_dtmfbuf(z))) {
+                       ast_log(LOG_DEBUG, "Got some dtmf ('%s')... on channel %s\n", zap_dtmfbuf(z), ast->name);
+                       /* DTMF tone detected.  Queue and erturn */
+                       if (p->callwaitcas) {
+                               if (!strcmp(zap_dtmfbuf(z), "A") || !strcmp(zap_dtmfbuf(z), "D")) {
+                                       ast_log(LOG_DEBUG, "Got some DTMF, but it's for the CAS\n");
+                                       if (p->cidspill)
+                                               free(p->cidspill);
+                                       send_cwcidspill(p);
+                               }
+                               /* Return NULL */
+                               pthread_mutex_unlock(&p->lock);
+                               return &p->f[index];
+                       } else {
+                               strncpy(p->dtmfq + strlen(p->dtmfq), zap_dtmfbuf(z), sizeof(p->dtmfq) - strlen(p->dtmfq));
+                               zap_clrdtmfn(z);
+                       }
+               } else {
+                       pthread_mutex_unlock(&p->lock);
+                       return zt_handle_event(ast);
+               }
+               if (strlen(p->dtmfq)) {
+                       p->f[index].subclass = p->dtmfq[0];
+                       memmove(p->dtmfq, p->dtmfq + 1, sizeof(p->dtmfq) - 1);
+                       p->f[index].frametype = AST_FRAME_DTMF;
+               }
+               pthread_mutex_unlock(&p->lock);
+               return &p->f[index];
+       }
+       if (p->callwaitingrepeat)
+               p->callwaitingrepeat--;
+       /* Repeat callwaiting */
+       if (p->callwaitingrepeat == 1) {
+               p->callwaitrings++;
+               zt_callwait(ast);
+       }
+       if (ast->pvt->rawreadformat == AST_FORMAT_SLINEAR) {
+               for (x=0;x<READ_SIZE;x++) {
+                       p->buffer[index][x + AST_FRIENDLY_OFFSET/2] = ast_mulaw[readbuf[x]];
+               }
+               p->f[index].datalen = READ_SIZE * 2;
+       } else 
+               p->f[index].datalen = READ_SIZE;
+
+       /* Handle CallerID Transmission */
+       if (p->cidspill &&((ast->state == AST_STATE_UP) || (ast->rings == 1)))
+               send_callerid(p);
+
+       p->f[index].frametype = AST_FRAME_VOICE;
+       p->f[index].subclass = ast->pvt->rawreadformat;
+       p->f[index].timelen = READ_SIZE/8;
+       p->f[index].mallocd = 0;
+       p->f[index].offset = AST_FRIENDLY_OFFSET;
+       p->f[index].data = p->buffer[index] + AST_FRIENDLY_OFFSET/2;
+#if 0
+       ast_log(LOG_DEBUG, "Read %d of voice on %s\n", p->f[index].datalen, ast->name);
+#endif 
+       if (p->dialing) {
+               /* Whoops, we're still dialing, don't send anything */
+               p->f[index].frametype = AST_FRAME_NULL;
+               p->f[index].subclass = 0;
+               p->f[index].timelen = 0;
+               p->f[index].mallocd = 0;
+               p->f[index].offset = 0;
+               p->f[index].data = NULL;
+               p->f[index].datalen= 0;
+       }
+       pthread_mutex_unlock(&p->lock);
+       return &p->f[index];
+}
+
+static int my_zt_write(struct zt_pvt *p, unsigned char *buf, int len, int threeway)
+{
+       int sent=0;
+       int size;
+       int res;
+       int fd;
+       if (threeway) 
+               fd = zap_fd(p->pseudo);
+       else
+               fd = zap_fd(p->z);
+       while(len) {
+               size = len;
+               if (size > READ_SIZE)
+                       size = READ_SIZE;
+               res = write(fd, buf, size);
+               if (res != size) {
+                       ast_log(LOG_DEBUG, "Write returned %d (%s) on channel %d\n", res, strerror(errno), p->channel);
+                       return sent;
+               }
+               len -= size;
+               buf += size;
+       }
+       return sent;
+}
+
+static int zt_write(struct ast_channel *ast, struct ast_frame *frame)
+{
+       struct zt_pvt *p = ast->pvt->pvt;
+       int x;
+       int res;
+       unsigned char outbuf[4096];
+       short *inbuf;
+       
+       if (ast != p->owner) {
+               /* If it's not us.  If this isn't a three way call, return immediately */
+               if (!INTHREEWAY(p)) {
+                       return 0;
+               }
+               /* If it's not the third call, return immediately */
+               if (ast != p->owners[p->thirdcallindex]) {
+                       return 0;
+               }
+       }
+       
+       /* Write a frame of (presumably voice) data */
+       if (frame->frametype != AST_FRAME_VOICE) {
+               ast_log(LOG_WARNING, "Don't know what to do with frame type '%d'\n", frame->frametype);
+               return -1;
+       }
+       if ((frame->subclass != AST_FORMAT_SLINEAR) && (frame->subclass != AST_FORMAT_ULAW)) {
+               ast_log(LOG_WARNING, "Cannot handle frames in %d format\n", frame->subclass);
+               return -1;
+       }
+       if (p->dialing) {
+#if 0
+               if (option_debug)
+#endif         
+                       ast_log(LOG_DEBUG, "Dropping frame since I'm still dialing on %s...\n",ast->name);
+               return 0;
+       }
+       if (p->cidspill) {
+#if 0
+               if (option_debug)
+#endif         
+                       ast_log(LOG_DEBUG, "Dropping frame since I've still got a callerid spill\n");
+               return 0;
+       }
+       /* Return if it's not valid data */
+       if (!frame->data || !frame->datalen)
+               return 0;
+       if (frame->datalen > sizeof(outbuf) * 2) {
+               ast_log(LOG_WARNING, "Frame too large\n");
+               return 0;
+       }
+       if (frame->subclass == AST_FORMAT_SLINEAR) {
+               inbuf = frame->data;
+               for (x=0;x<frame->datalen/2;x++)
+                       outbuf[x] = ast_lin2mu[inbuf[x]+32768];
+               res = my_zt_write(p, outbuf, frame->datalen/2, (ast != p->owner));
+       } else {
+               /* uLaw already */
+               res = my_zt_write(p, (unsigned char *)frame->data, frame->datalen, (ast != p->owner));
+       }
+       if (res < 0) {
+               ast_log(LOG_WARNING, "write failed: %s\n", strerror(errno));
+               return -1;
+       } else if (res != frame->datalen/2) {
+               /* Some sort of an event */
+               return 0;
+       }
+       return 0;
+}
+
+static int zt_indicate(struct ast_channel *chan, int condition)
+{
+       struct zt_pvt *p = chan->pvt->pvt;
+       int res=-1;
+       switch(condition) {
+       case AST_CONTROL_BUSY:
+               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_BUSY);
+               break;
+       case AST_CONTROL_RINGING:
+               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_RINGTONE);
+               if (chan->state != AST_STATE_UP) {
+                       if ((chan->state != AST_STATE_RING) ||
+                               ((p->sig != SIG_FXSKS) &&
+                                (p->sig != SIG_FXSLS) &&
+                                (p->sig != SIG_FXSGS)))
+                               chan->state = AST_STATE_RINGING;
+               }
+               break;
+       case AST_CONTROL_CONGESTION:
+               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+               break;
+       default:
+               ast_log(LOG_WARNING, "Don't know how to set condition %d on channel %s\n", condition, chan->name);
+       }
+       return res;
+}
+
+static struct ast_channel *zt_new(struct zt_pvt *i, int state, int startpbx, int callwaiting, int thirdcall)
+{
+       struct ast_channel *tmp;
+       int x;
+       for (x=0;x<3;x++)
+               if (!i->owners[x])
+                       break;
+       if (x > 2) {
+               ast_log(LOG_WARNING, "No available owner slots\n");
+               return NULL;
+       }
+       tmp = ast_channel_alloc();
+       if (tmp) {
+               snprintf(tmp->name, sizeof(tmp->name), "Zap/%d-%d", i->channel, x + 1);
+               tmp->type = type;
+               tmp->fds[0] = zap_fd(i->z);
+               tmp->nativeformats = AST_FORMAT_SLINEAR | AST_FORMAT_ULAW;
+               /* Start out assuming ulaw since it's smaller :) */
+               tmp->pvt->rawreadformat = AST_FORMAT_ULAW;
+               tmp->readformat = AST_FORMAT_ULAW;
+               tmp->pvt->rawwriteformat = AST_FORMAT_ULAW;
+               tmp->writeformat = AST_FORMAT_ULAW;
+               
+               tmp->state = state;
+               if (state == AST_STATE_RING)
+                       tmp->rings = 1;
+               tmp->pvt->pvt = i;
+               tmp->pvt->send_digit = zt_digit;
+               tmp->pvt->call = zt_call;
+               tmp->pvt->hangup = zt_hangup;
+               tmp->pvt->answer = zt_answer;
+               tmp->pvt->read = zt_read;
+               tmp->pvt->write = zt_write;
+               tmp->pvt->bridge = zt_bridge;
+               tmp->pvt->exception = zt_exception;
+               tmp->pvt->indicate = zt_indicate;
+               tmp->pvt->fixup = zt_fixup;
+               tmp->pvt->setoption = zt_setoption;
+               if (strlen(i->language))
+                       strncpy(tmp->language, i->language, sizeof(tmp->language));
+               /* Keep track of who owns it */
+               i->owners[x] = tmp;
+               if (!i->owner)
+                       i->owner = tmp;
+               if (callwaiting) {
+                       if (i->callwaitindex > -1)
+                               ast_log(LOG_WARNING, "channel %d already has a call wait call\n", i->channel);
+                       i->callwaitindex = x;
+               } else if (thirdcall) {
+                       if (i->thirdcallindex > -1)
+                               ast_log(LOG_WARNING, "channel %d already has a third call\n", i->channel);
+                       i->thirdcallindex = x;
+               } else {
+                       if (i->normalindex > -1) 
+                               ast_log(LOG_WARNING, "channel %d already has a normal call\n", i->channel);
+                       i->normalindex = x;
+               }
+               ast_pthread_mutex_lock(&usecnt_lock);
+               usecnt++;
+               ast_pthread_mutex_unlock(&usecnt_lock);
+               ast_update_use_count();
+               strncpy(tmp->context, i->context, sizeof(tmp->context));
+               if (strlen(i->exten))
+                       strncpy(tmp->exten, i->exten, sizeof(tmp->exten));
+               if (startpbx) {
+                       if (strlen(i->callerid))
+                               tmp->callerid = strdup(i->callerid);
+                       if (ast_pbx_start(tmp)) {
+                               ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
+                               ast_hangup(tmp);
+                               tmp = NULL;
+                       }
+               }
+       } else
+               ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
+       return tmp;
+}
+
+
+static int bump_gains(struct zt_pvt *p)
+{
+       int res;
+       /* Bump receive gain by 9.0db */
+       res = set_actual_gain(zap_fd(p->z), 0, p->rxgain + 5.0, p->txgain);
+       if (res) {
+               ast_log(LOG_WARNING, "Unable to bump gain\n");
+               return -1;
+       }
+       return 0;
+}
+
+static int restore_gains(struct zt_pvt *p)
+{
+       int res;
+       /* Bump receive gain by 9.0db */
+       res = set_actual_gain(zap_fd(p->z), 0, p->rxgain, p->txgain);
+       if (res) {
+               ast_log(LOG_WARNING, "Unable to restore gains: %s\n", strerror(errno));
+               return -1;
+       }
+       return 0;
+}
+
+static void *ss_thread(void *data)
+{
+       struct ast_channel *chan = data;
+       struct zt_pvt *p = chan->pvt->pvt;
+       char exten[AST_MAX_EXTENSION];
+       char exten2[AST_MAX_EXTENSION];
+       unsigned char buf[256];
+       char cid[256];
+       struct callerid_state *cs;
+       char *name=NULL, *number=NULL;
+       int flags;
+       int i;
+       int timeout;
+       char *s1, *s2;
+       int len = 0;
+       int res;
+       if (option_verbose > 2) 
+               ast_verbose( VERBOSE_PREFIX_3 "Starting simple switch on '%s'\n", chan->name);
+       zap_clrdtmf(p->z);
+       switch(p->sig) {
+       case SIG_FEATD:
+       case SIG_EMWINK:
+               zap_wink(p->z);
+               /* Fall through */
+       case SIG_EM:
+               res = tone_zone_play_tone(zap_fd(p->z), -1);
+               zap_clrdtmf(p->z);
+               /* Wait for the first digit (up to 1 second). */
+               res = zap_getdtmf(p->z, 1, NULL, 0, 1000, 1000, ZAP_TIMEOUTOK | ZAP_HOOKEXIT);
+
+               if (res == 1) {
+                       /* If we got it, get the rest */
+                       res = zap_getdtmf(p->z, 50, NULL, 0, 250, 15000, ZAP_TIMEOUTOK | ZAP_HOOKEXIT);
+               }
+               if (res == -1) {
+                       ast_log(LOG_WARNING, "getdtmf on channel %d: %s\n", p->channel, strerror(errno));
+                       ast_hangup(chan);
+                       return NULL;
+               } else if (res < 0) {
+                       ast_log(LOG_DEBUG, "Got hung up before digits finished\n");
+                       ast_hangup(chan);
+                       return NULL;
+               }
+               strncpy(exten, zap_dtmfbuf(p->z), sizeof(exten));
+               if (!strlen(exten))
+                       strncpy(exten, "s", sizeof(exten));
+               if (p->sig == SIG_FEATD) {
+                       if (exten[0] == '*') {
+                               strncpy(exten2, exten, sizeof(exten2));
+                               /* Parse out extension and callerid */
+                               s1 = strtok(exten2 + 1, "*");
+                               s2 = strtok(NULL, "*");
+                               if (s2) {
+                                       if (strlen(p->callerid))
+                                               chan->callerid = strdup(p->callerid);
+                                       else
+                                               chan->callerid = strdup(s1);
+                                       strncpy(exten, s2, sizeof(exten));
+                               } else
+                                       strncpy(exten, s1, sizeof(exten));
+                       } else
+                               ast_log(LOG_WARNING, "Got a non-Feature Group D input on channel %d.  Assuming E&M Wink instead\n", p->channel);
+               }
+               zt_enable_ec(p);
+               if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid)) {
+                       strncpy(chan->exten, exten, sizeof(chan->exten));
+                       zap_clrdtmf(p->z);
+                       res = ast_pbx_run(chan);
+                       if (res) {
+                               ast_log(LOG_WARNING, "PBX exited non-zero\n");
+                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                       }
+                       return NULL;
+               } else {
+                       if (option_verbose > 2)
+                               ast_verbose(VERBOSE_PREFIX_2 "Unknown extension '%s' in context '%s' requested\n", exten, chan->context);
+                       sleep(2);
+                       res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_INFO);
+                       if (res < 0)
+                               ast_log(LOG_WARNING, "Unable to start special tone on %d\n", p->channel);
+                       else
+                               sleep(1);
+                       res = ast_streamfile(chan, "ss-noservice", chan->language);
+                       if (res >= 0)
+                               ast_waitstream(chan, "");
+                       res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                       ast_hangup(chan);
+                       return NULL;
+               }
+               break;
+       case SIG_FXOLS:
+       case SIG_FXOGS:
+       case SIG_FXOKS:
+               /* Read the first digit */
+               timeout = firstdigittimeout;
+               while(len < AST_MAX_EXTENSION-1) {
+                       res = ast_waitfordigit(chan, timeout);
+                       if (res < 0) {
+                               ast_log(LOG_DEBUG, "waitfordigit returned < 0...\n");
+                               res = tone_zone_play_tone(zap_fd(p->z), -1);
+                               ast_hangup(chan);
+                               return NULL;
+                       } else if (res == 0) {
+                               ast_log(LOG_DEBUG, "not enough digits...\n");
+                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                               zt_wait_event(zap_fd(p->z));
+                               ast_hangup(chan);
+                               return NULL;
+                       } else {
+                               exten[len++]=res;
+                               exten[len] = '\0';
+                       }
+                       if (!ast_ignore_pattern(chan->context, exten))
+                               tone_zone_play_tone(zap_fd(p->z), -1);
+                       if (ast_exists_extension(chan, chan->context, exten, 1, p->callerid)) {
+                               res = tone_zone_play_tone(zap_fd(p->z), -1);
+                               strncpy(chan->exten, exten, sizeof(chan->exten));
+                               if (strlen(p->callerid) && !p->hidecallerid)
+                                       chan->callerid = strdup(p->callerid);
+                               chan->state = AST_STATE_RING;
+                               zt_enable_ec(p);
+                               res = ast_pbx_run(chan);
+                               if (res) {
+                                       ast_log(LOG_WARNING, "PBX exited non-zero\n");
+                                       res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                               }                                               
+                               return NULL;
+                       } else if (p->callwaiting && !strcmp(exten, "*70")) {
+                               if (option_verbose > 2) 
+                                       ast_verbose(VERBOSE_PREFIX_3 "Disabling call waiting on %s\n", chan->name);
+                               /* Disable call waiting if enabled */
+                               p->callwaiting = 0;
+                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_DIALRECALL);
+                               if (res) {
+                                       ast_log(LOG_WARNING, "Unable to do dial recall on channel %s: %s\n", 
+                                               chan->name, strerror(errno));
+                               }
+                               len = 0;
+                               ioctl(zap_fd(p->z),ZT_CONFDIAG,&len);
+                               memset(exten, 0, sizeof(exten));
+                               timeout = firstdigittimeout;
+                                       
+                       } else if (!strcmp(exten,"*8#")){
+                               /* Scan all channels and see if any there
+                                * ringing channqels with that have call groups
+                                * that equal this channels pickup group  
+                                */
+                               struct zt_pvt *chan_pvt=iflist;
+                               while(chan_pvt!=NULL){
+                                       if((p!=chan_pvt)&&
+                                         ((p->pickupgroup & chan_pvt->callgroup)==chan_pvt->callgroup)&&
+                                         (chan_pvt->owner && (chan_pvt->owner->state==AST_STATE_RING || chan_pvt->owner->state == AST_STATE_RINGING))
+                                         ){
+                                               /* Switch us from Third call to Call Wait */
+                                               p->callwaitindex = p->thirdcallindex;
+                                               p->thirdcallindex = -1;
+                                               ast_log(LOG_DEBUG, "Call pickup on chan %s\n",chan_pvt->owner->name);
+                                               p->needanswer[zt_get_index(chan, p, 1)]=1;
+                                               zt_enable_ec(p);
+                                               if(ast_channel_masquerade(chan_pvt->owner,p->owner))
+                                                       printf("Error Masquerade failed on call-pickup\n");
+                                               /* Do not hang up masqueraded channel */
+                                               return NULL;
+                                       }
+                                       chan_pvt=chan_pvt->next;
+                               }
+                               ast_log(LOG_DEBUG, "No call pickup possible...\n");
+                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                               zt_wait_event(zap_fd(p->z));
+                               ast_hangup(chan);
+                               return NULL;
+                       } else if (!p->hidecallerid && !strcmp(exten, "*67")) {
+                               if (option_verbose > 2) 
+                                       ast_verbose(VERBOSE_PREFIX_3 "Disabling Caller*ID on %s\n", chan->name);
+                               /* Disable Caller*ID if enabled */
+                               p->hidecallerid = 1;
+                               if (chan->callerid)
+                                       free(chan->callerid);
+                               chan->callerid = NULL;
+                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_DIALRECALL);
+                               if (res) {
+                                       ast_log(LOG_WARNING, "Unable to do dial recall on channel %s: %s\n", 
+                                               chan->name, strerror(errno));
+                               }
+                               len = 0;
+                               memset(exten, 0, sizeof(exten));
+                               timeout = firstdigittimeout;
+                                       
+                       } else if (p->hidecallerid && !strcmp(exten, "*82")) {
+                               if (option_verbose > 2) 
+                                       ast_verbose(VERBOSE_PREFIX_3 "Enabling Caller*ID on %s\n", chan->name);
+                               /* Enable Caller*ID if enabled */
+                               p->hidecallerid = 0;
+                               if (chan->callerid)
+                                       free(chan->callerid);
+                               chan->callerid = NULL;
+                               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_DIALRECALL);
+                               if (res) {
+                                       ast_log(LOG_WARNING, "Unable to do dial recall on channel %s: %s\n", 
+                                               chan->name, strerror(errno));
+                               }
+                               len = 0;
+                               memset(exten, 0, sizeof(exten));
+                               timeout = firstdigittimeout;
+                       } else if (!strcmp(exten, "*0")) {
+                               int index = zt_get_index(chan, p, 0);
+                               struct ast_channel *nbridge = 
+                                       p->owners[p->normalindex]->bridge;
+                               struct zt_pvt *pbridge = NULL;
+                                 /* set up the private struct of the bridged one, if any */
+                               if (nbridge) pbridge = nbridge->pvt->pvt;
+                               if ((p->thirdcallindex > -1) &&
+                                   (index == p->thirdcallindex) &&
+                                   nbridge && 
+                                   (!strcmp(nbridge->type,"Zap")) &&
+                                   ISTRUNK(pbridge)) {
+                                       int func = ZT_FLASH;
+                                       /* flash hookswitch */
+                                       if (ioctl(zap_fd(pbridge->z),ZT_HOOK,&func) == -1) {
+                                               ast_log(LOG_WARNING, "Unable to flash external trunk on channel %s: %s\n", 
+                                                       nbridge->name, strerror(errno));
+                                       }                               
+                                       p->owner = p->owners[p->normalindex];
+                                       ast_hangup(chan);
+                                       return NULL;
+                               } else {
+                                       tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+                                       zt_wait_event(zap_fd(p->z));
+                                       tone_zone_play_tone(zap_fd(p->z), -1);
+                                       p->owner = p->owners[p->normalindex];
+                                       ast_hangup(chan);
+                                       return NULL;
+                               }                                       
+                       } else if (!ast_canmatch_extension(chan, chan->context, exten, 1, chan->callerid) &&
+                                                       ((exten[0] != '*') || (strlen(exten) > 2))) {
+                               if (option_debug)
+                                       ast_log(LOG_DEBUG, "Can't match %s from '%s' in context %s\n", exten, chan->callerid ? chan->callerid : "<Unknown Caller>", chan->context);
+                               break;
+                       }
+                       timeout = gendigittimeout;
+                       if (len && !ast_ignore_pattern(chan->context, exten))
+                               tone_zone_play_tone(zap_fd(p->z), -1);
+               }
+               break;
+       case SIG_FXSLS:
+       case SIG_FXSGS:
+       case SIG_FXSKS:
+               if (p->use_callerid) {
+                       cs = callerid_new();
+                       if (cs) {
+#if 1
+                               bump_gains(p);
+#endif                         
+                               len = 0;
+                               for(;;) {       
+                                       i = ZT_IOMUX_READ | ZT_IOMUX_SIGEVENT;
+                                       if ((res = ioctl(zap_fd(p->z), ZT_IOMUX, &i)))  {
+                                               ast_log(LOG_WARNING, "I/O MUX failed: %s\n", strerror(errno));
+                                               callerid_free(cs);
+                                               ast_hangup(chan);
+                                               return NULL;
+                                       }
+                                       if (i & ZT_IOMUX_SIGEVENT) {
+                                               res = zt_get_event(zap_fd(p->z));
+                                               ast_log(LOG_NOTICE, "Got event %d (%s)...\n", res, event2str(res));
+                                               res = 0;
+                                               break;
+                                       } else if (i & ZT_IOMUX_READ) {
+                                               res = read(zap_fd(p->z), buf, sizeof(buf));
+                                               if (res < 0) {
+                                                       if (errno != ELAST) {
+                                                               ast_log(LOG_WARNING, "read returned error: %s\n", strerror(errno));
+                                                               callerid_free(cs);
+                                                               ast_hangup(chan);
+                                                               return NULL;
+                                                       }
+                                                       break;
+                                               }
+                                               if (p->ringt) 
+                                                       p->ringt--;
+                                               if (p->ringt == 1) {
+                                                       res = -1;
+                                                       break;
+                                               }
+                                               res = callerid_feed(cs, buf, res);
+                                               if (res < 0) {
+                                                       ast_log(LOG_WARNING, "CallerID feed failed: %s\n", strerror(errno));
+                                                       break;
+                                               } else if (res)
+                                                       break;
+                                       }
+                               }
+                               if (res == 1) {
+                                       callerid_get(cs, &name, &number, &flags);
+                                       if (option_debug)
+                                               ast_log(LOG_DEBUG, "CallerID number: %s, name: %s, flags=%d\n", number, name, flags);
+                               }
+#if 1
+                               restore_gains(p);
+#endif                         
+                               if (res < 0) {
+                                       ast_log(LOG_WARNING, "CallerID returned with error on channel '%s'\n", chan->name);
+                               }
+                       } else
+                               ast_log(LOG_WARNING, "Unable to get caller ID space\n");
+               }
+               if (name && number) {
+                       snprintf(cid, sizeof(cid), "\"%s\" <%s>", name, number);
+               } else if (name) {
+                       snprintf(cid, sizeof(cid), "\"%s\"", name);
+               } else if (number) {
+                       snprintf(cid, sizeof(cid), "%s", number);
+               } else {
+                       strcpy(cid, "");
+               }
+               if (strlen(cid))
+                       chan->callerid = strdup(cid);
+               chan->state = AST_STATE_RING;
+               chan->rings = 1;
+               p->ringt = RINGT;
+               zt_enable_ec(p);
+               res = ast_pbx_run(chan);
+               if (res) {
+                       ast_hangup(chan);
+                       ast_log(LOG_WARNING, "PBX exited non-zero\n");
+               }
+               return NULL;
+       default:
+               ast_log(LOG_WARNING, "Don't know how to handle simple switch with signalling %s on channel %d\n", sig2str(p->sig), p->channel);
+               res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+               if (res < 0)
+                               ast_log(LOG_WARNING, "Unable to play congestion tone on channel %d\n", p->channel);
+       }
+       res = tone_zone_play_tone(zap_fd(p->z), ZT_TONE_CONGESTION);
+       if (res < 0)
+                       ast_log(LOG_WARNING, "Unable to play congestion tone on channel %d\n", p->channel);
+       ast_hangup(chan);
+       return NULL;
+}
+
+static int handle_init_event(struct zt_pvt *i, int event)
+{
+       int res;
+       pthread_t threadid;
+       pthread_attr_t attr;
+       struct ast_channel *chan;
+       pthread_attr_init(&attr);
+       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+       /* Handle an event on a given channel for the monitor thread. */
+       switch(event) {
+       case ZT_EVENT_RINGOFFHOOK:
+               if (i->inalarm) break;
+               /* Got a ring/answer.  What kind of channel are we? */
+               switch(i->sig) {
+               case SIG_FXOLS:
+               case SIG_FXOGS:
+               case SIG_FXOKS:
+                       if (i->immediate) {
+                               zt_enable_ec(i);
+                               /* The channel is immediately up.  Start right away */
+                               res = tone_zone_play_tone(zap_fd(i->z), ZT_TONE_RINGTONE);
+                               chan = zt_new(i, AST_STATE_RING, 1, 0, 0);
+                               if (!chan)  {
+                                       ast_log(LOG_WARNING, "Unable to start PBX on channel %d\n", i->channel);
+                                       res = tone_zone_play_tone(zap_fd(i->z), ZT_TONE_CONGESTION);
+                                       if (res < 0)
+                                               ast_log(LOG_WARNING, "Unable to play congestion tone on channel %d\n", i->channel);
+                               }
+                       } else {
+                               res = tone_zone_play_tone(zap_fd(i->z), ZT_TONE_DIALTONE);
+                               if (res < 0) 
+                                       ast_log(LOG_WARNING, "Unable to play dialtone on channel %d\n", i->channel);
+                               /* Check for callerid, digits, etc */
+                               chan = zt_new(i, AST_STATE_DOWN, 0, 0, 0);
+                               if (pthread_create(&threadid, &attr, ss_thread, chan)) {
+                                       ast_log(LOG_WARNING, "Unable to start simple switch thread on channel %d\n", i->channel);
+                                       res = tone_zone_play_tone(zap_fd(i->z), ZT_TONE_CONGESTION);
+                                       if (res < 0)
+                                               ast_log(LOG_WARNING, "Unable to play congestion tone on channel %d\n", i->channel);
+                                       ast_hangup(chan);
+                               }
+#if 0
+                               printf("Created thread %ld detached in switch\n", threadid);
+#endif
+                       }
+                       break;
+               case SIG_FXSLS:
+               case SIG_FXSGS:
+               case SIG_FXSKS:
+                               i->ringt = RINGT;
+                               /* Fall through */
+               case SIG_EMWINK:
+               case SIG_FEATD:
+               case SIG_EM:
+                               /* Check for callerid, digits, etc */
+                               chan = zt_new(i, AST_STATE_RING, 0, 0, 0);
+                               if (pthread_create(&threadid, &attr, ss_thread, chan)) {
+                                       ast_log(LOG_WARNING, "Unable to start simple switch thread on channel %d\n", i->channel);
+                                       res = tone_zone_play_tone(zap_fd(i->z), ZT_TONE_CONGESTION);
+                                       if (res < 0)
+                                               ast_log(LOG_WARNING, "Unable to play congestion tone on channel %d\n", i->channel);
+                                       ast_hangup(chan);
+                               }
+#if 0
+                               printf("Created thread %ld detached in switch(2)\n", threadid);
+#endif
+                               break;
+               default:
+                       ast_log(LOG_WARNING, "Don't know how to handle ring/answer with signalling %s on channel %d\n", sig2str(i->sig), i->channel);
+                       res = tone_zone_play_tone(zap_fd(i->z), ZT_TONE_CONGESTION);
+                       if (res < 0)
+                                       ast_log(LOG_WARNING, "Unable to play congestion tone on channel %d\n", i->channel);
+                       return -1;
+               }
+               break;
+       case ZT_EVENT_NOALARM:
+               i->inalarm = 0;
+               break;
+       case ZT_EVENT_ALARM:
+               i->inalarm = 1;
+               /* fall thru intentionally */
+       case ZT_EVENT_WINKFLASH:
+       case ZT_EVENT_ONHOOK:
+               /* Back on hook.  Hang up. */
+               switch(i->sig) {
+               case SIG_FXOLS:
+               case SIG_FXOGS:
+               case SIG_FXOKS:
+               case SIG_FEATD:
+               case SIG_EM:
+               case SIG_EMWINK:
+               case SIG_FXSLS:
+               case SIG_FXSGS:
+               case SIG_FXSKS:
+                       zt_disable_ec(i);
+                       res = tone_zone_play_tone(zap_fd(i->z), -1);
+                       zt_set_hook(zap_fd(i->z), ZT_ONHOOK);
+                       break;
+               default:
+                       ast_log(LOG_WARNING, "Don't know hwo to handle on hook with signalling %s on channel %d\n", sig2str(i->sig), i->channel);
+                       res = tone_zone_play_tone(zap_fd(i->z), -1);
+                       return -1;
+               }
+               break;
+       }
+       return 0;
+}
+
+static void *do_monitor(void *data)
+{
+       fd_set efds;
+       int n, res;
+       struct zt_pvt *i;
+       /* This thread monitors all the frame relay interfaces which are not yet in use
+          (and thus do not have a separate thread) indefinitely */
+       /* From here on out, we die whenever asked */
+#if 0
+       if (pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL)) {
+               ast_log(LOG_WARNING, "Unable to set cancel type to asynchronous\n");
+               return NULL;
+       }
+       ast_log(LOG_DEBUG, "Monitor starting...\n");
+#endif
+       for(;;) {
+               /* Lock the interface list */
+               if (ast_pthread_mutex_lock(&iflock)) {
+                       ast_log(LOG_ERROR, "Unable to grab interface lock\n");
+                       return NULL;
+               }
+               /* Build the stuff we're going to select on, that is the socket of every
+                  zt_pvt that does not have an associated owner channel */
+               n = -1;
+               FD_ZERO(&efds);
+               i = iflist;
+               while(i) {
+                       if (FD_ISSET(zap_fd(i->z), &efds)) 
+                               ast_log(LOG_WARNING, "Descriptor %d appears twice?\n", zap_fd(i->z));
+                       if (!i->owner) {
+                               /* This needs to be watched, as it lacks an owner */
+                               FD_SET(zap_fd(i->z), &efds);
+                               if (zap_fd(i->z) > n)
+                                       n = zap_fd(i->z);
+                       }
+                       i = i->next;
+               }
+               /* Okay, now that we know what to do, release the interface lock */
+               ast_pthread_mutex_unlock(&iflock);
+               
+               pthread_testcancel();
+               /* Wait indefinitely for something to happen */
+               res = select(n + 1, NULL, NULL, &efds, NULL);
+               pthread_testcancel();
+               /* Okay, select has finished.  Let's see what happened.  */
+               if (res < 0) {
+                       if ((errno != EAGAIN) && (errno != EINTR))
+                               ast_log(LOG_WARNING, "select return %d: %s\n", res, strerror(errno));
+                       continue;
+               }
+               /* Alright, lock the interface list again, and let's look and see what has
+                  happened */
+               if (ast_pthread_mutex_lock(&iflock)) {
+                       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
+                       continue;
+               }
+               i = iflist;
+               while(i) {
+                       if (FD_ISSET(zap_fd(i->z), &efds)) {
+                               if (i->owner) {
+                                       ast_log(LOG_WARNING, "Whoa....  I'm owned but found (%d)...\n", zap_fd(i->z));
+                                       i = i->next;
+                                       continue;
+                               }
+                               res = zt_get_event(zap_fd(i->z));
+                               if (option_debug)
+                                       ast_log(LOG_DEBUG, "Monitor doohicky got event %s on channel %d\n", event2str(res), i->channel);
+                               handle_init_event(i, res);
+                       }
+                       i=i->next;
+               }
+               ast_pthread_mutex_unlock(&iflock);
+       }
+       /* Never reached */
+       return NULL;
+       
+}
+
+static int restart_monitor(void)
+{
+       pthread_attr_t attr;
+       pthread_attr_init(&attr);
+       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+       /* If we're supposed to be stopped -- stay stopped */
+       if (monitor_thread == -2)
+               return 0;
+       if (ast_pthread_mutex_lock(&monlock)) {
+               ast_log(LOG_WARNING, "Unable to lock monitor\n");
+               return -1;
+       }
+       if (monitor_thread == pthread_self()) {
+               ast_pthread_mutex_unlock(&monlock);
+               ast_log(LOG_WARNING, "Cannot kill myself\n");
+               return -1;
+       }
+       if (monitor_thread) {
+               pthread_cancel(monitor_thread);
+               pthread_kill(monitor_thread, SIGURG);
+               pthread_join(monitor_thread, NULL);
+       }
+       /* Start a new monitor */
+       if (pthread_create(&monitor_thread, &attr, do_monitor, NULL) < 0) {
+               ast_pthread_mutex_unlock(&monlock);
+               ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
+               return -1;
+       }
+#if 0
+       printf("Created thread %ld detached in restart monitor\n", monitor_thread);
+#endif
+       ast_pthread_mutex_unlock(&monlock);
+       return 0;
+}
+
+static int reset_channel(struct zt_pvt *p)
+{
+       int ioctlflag = 1;
+       int res = 0;
+       int i = 0;
+
+       ast_log(LOG_DEBUG, "reset_channel()\n");
+       if (p->owner) {
+               ioctlflag = 0;
+               p->owner->softhangup = 1;
+       }
+       for (i = 0; i < 3; i++) {
+               if (p->owners[i]) {
+                       ioctlflag = 0;
+                       p->owners[i]->softhangup = 1;
+               }
+       }
+       if (ioctlflag) {
+               res = zt_set_hook(zap_fd(p->z), ZT_ONHOOK);
+               if (res < 0) {
+                       ast_log(LOG_ERROR, "Unable to hangup chan_zap channel %d (ioctl)\n", p->channel);
+                       return -1;
+               }
+       }
+
+       return 0;
+}
+
+
+static struct zt_pvt *mkintf(int channel, int signalling)
+{
+       /* Make a zt_pvt structure for this interface */
+       struct zt_pvt *tmp = NULL, *tmp2,  *prev = NULL;
+       char fn[80];
+#if 1
+       struct zt_bufferinfo bi;
+#endif 
+       struct zt_spaninfo si;
+       int res;
+       int span;
+       int here = 0;
+       ZT_PARAMS p;
+       
+       tmp2 = iflist;
+       prev = NULL;
+
+       while (tmp2) {
+               if (tmp2->channel == channel) {
+                       tmp = tmp2;
+                       here = 1;
+                       break;
+               }
+               if (tmp2->channel > channel) {
+                       break;
+               }
+               prev = tmp2;
+               tmp2 = tmp2->next;
+       }
+
+       if (!here) {
+               tmp = (struct zt_pvt*)malloc(sizeof(struct zt_pvt));
+               if (!tmp) {
+                       ast_log(LOG_ERROR, "MALLOC FAILED\n");
+                       return NULL;
+               }
+               memset(tmp, 0, sizeof(struct zt_pvt));
+               tmp->next = tmp2;
+               if (!prev) {
+                       iflist = tmp;
+               } else {
+                       prev->next = tmp;
+               }
+       }
+
+       if (tmp) {
+               snprintf(fn, sizeof(fn), "/dev/zap/%d", channel);
+               /* Open non-blocking */
+               if (!here)
+                       tmp->z = zap_open(fn, 1);
+               /* Allocate a zapata structure */
+               if (!tmp->z) {
+                       ast_log(LOG_ERROR, "Unable to open channel %d: %s\nhere = %d, tmp->channel = %d, channel = %d\n", channel, strerror(errno), here, tmp->channel, channel);
+                       free(tmp);
+                       return NULL;
+               }
+               res = ioctl(zap_fd(tmp->z), ZT_GET_PARAMS, &p);
+               if (res < 0) {
+                       ast_log(LOG_ERROR, "Unable to get parameters\n");
+                       free(tmp);
+                       return NULL;
+               }
+               if (p.sigtype != (signalling & 0xffff)) {
+                       ast_log(LOG_ERROR, "Signalling requested is %s but line is in %s signalling\n", sig2str(signalling), sig2str(p.sigtype));
+                       free(tmp);
+                       return NULL;
+               }
+               if (here) {
+                       if (tmp->sig != signalling) {
+                               if (reset_channel(tmp)) {
+                                       ast_log(LOG_ERROR, "Failed to reset chan_zap channel %d\n", tmp->channel);
+                                       return NULL;
+                               }
+                       }
+               }
+                       
+               span = (channel - 1)/24;
+               tmp->span = span + 1;
+#ifdef ZAPATA_PRI
+               if (signalling == SIG_PRI) {
+                       int offset;
+                       offset = 1;
+                       if (ioctl(zap_fd(tmp->z), ZT_AUDIOMODE, &offset)) {
+                               ast_log(LOG_ERROR, "Unable to set audio mode on clear channel %d of span %d: %s\n", channel, span, strerror(errno));
+                               return NULL;
+                       }
+                       if (span >= NUM_SPANS) {
+                               ast_log(LOG_ERROR, "Channel %d does not lie on a span I know of (%d)\n", channel, span);
+                               free(tmp);
+                               return NULL;
+                       } else {
+                               offset = (channel -1) % 24 + 1;
+                               if (offset < 24) {
+                                       if (pris[span].nodetype && (pris[span].nodetype != pritype)) {
+                                               ast_log(LOG_ERROR, "Span %d is already a %s node\n", span + 1, pri_node2str(pris[span].nodetype));
+                                               free(tmp);
+                                               return NULL;
+                                       }
+                                       if (pris[span].switchtype && (pris[span].switchtype != switchtype)) {
+                                               ast_log(LOG_ERROR, "Span %d is already a %s switch\n", span + 1, pri_switch2str(pris[span].switchtype));
+                                               free(tmp);
+                                               return NULL;
+                                       }
+                                       pris[span].nodetype = pritype;
+                                       pris[span].switchtype = switchtype;
+                                       pris[span].chanmask[offset] |= MASK_AVAIL;
+                                       pris[span].pvt[offset] = tmp;
+                                       tmp->pri = &pris[span];
+                                       tmp->call = NULL;
+                               } else {
+                                       ast_log(LOG_ERROR, "Channel 24 is reserved for D-channel.\n");
+                                       free(tmp);
+                                       return NULL;
+                               }
+                       }
+               }
+#endif         
+               /* Adjust starttime on loopstart and kewlstart trunks to reasonable values */
+               if ((signalling == SIG_FXSKS) || (signalling == SIG_FXSLS) ||
+                   (signalling == SIG_EM) || (signalling == SIG_EMWINK)) {
+                       p.starttime = 250;
+                       res = ioctl(zap_fd(tmp->z), ZT_SET_PARAMS, &p);
+                       if (res < 0) {
+                               ast_log(LOG_ERROR, "Unable to set parameters\n");
+                               free(tmp);
+                               return NULL;
+                       }
+               }
+#if 0
+               res = fcntl(zap_fd(tmp->z), F_GETFL);
+               if (res >= 0) {
+                       res |= O_NONBLOCK;
+                       if (fcntl(zap_fd(tmp->z), F_SETFL, res))
+                               ast_log(LOG_WARNING, "Unable to set non-blocking mode on channel %d\n", channel);
+               } else
+                       ast_log(LOG_WARNING, "Unable to read flags on channel %d\n", channel);
+#endif                 
+#if 1
+               if (!here) {
+                       res = ioctl(zap_fd(tmp->z), ZT_GET_BUFINFO, &bi);
+                       if (!res) {
+                               bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
+                               bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
+                               bi.numbufs = 4;
+                               res = ioctl(zap_fd(tmp->z), ZT_SET_BUFINFO, &bi);
+                               if (res < 0) {
+                                       ast_log(LOG_WARNING, "Unable to set buffer policy on channel %d\n", channel);
+                               }
+                       } else
+                               ast_log(LOG_WARNING, "Unable to check buffer policy on channel %d\n", channel);
+               }
+#endif
+               tmp->immediate = immediate;
+               tmp->sig = signalling;
+               if ((signalling == SIG_FXOKS) || (signalling == SIG_FXOLS) || (signalling == SIG_FXOGS))
+                       tmp->permcallwaiting = callwaiting;
+               else
+                       tmp->permcallwaiting = 0;
+               /* Flag to destroy the channel must be cleared on new mkif.  Part of changes for reload to work */
+               tmp->destroy = 0;
+               tmp->callwaitingcallerid = callwaitingcallerid;
+               tmp->threewaycalling = threewaycalling;
+               tmp->permhidecallerid = hidecallerid;
+               tmp->echocancel = echocancel;
+               tmp->callwaiting = tmp->permcallwaiting;
+               tmp->hidecallerid = tmp->permhidecallerid;
+               tmp->channel = channel;
+               tmp->stripmsd = stripmsd;
+               tmp->use_callerid = use_callerid;
+               if (!here) {
+                       tmp->callwaitindex = -1;
+                       tmp->normalindex = -1;
+                       tmp->thirdcallindex = -1;
+                       tmp->normalindex = -1;
+                       tmp->confno = -1;
+                       tmp->pseudo = NULL;
+                       tmp->pseudochan = 0;
+               }
+               tmp->transfer = transfer;
+               pthread_mutex_init(&tmp->lock, NULL);
+               strncpy(tmp->language, language, sizeof(tmp->language));
+               strncpy(tmp->context, context, sizeof(tmp->context));
+               strncpy(tmp->callerid, callerid, sizeof(tmp->callerid));
+               tmp->group = cur_group;
+               tmp->callgroup=cur_callergroup;
+               tmp->pickupgroup=cur_pickupgroup;
+               tmp->rxgain = rxgain;
+               tmp->txgain = txgain;
+               set_actual_gain(zap_fd(tmp->z), 0, tmp->rxgain, tmp->txgain);
+               zap_digitmode(tmp->z, ZAP_DTMF /* | ZAP_MUTECONF */);
+               conf_clear(tmp);
+               if (!here) {
+                       if (signalling != SIG_PRI) 
+                               /* Hang it up to be sure it's good */
+                               zt_set_hook(zap_fd(tmp->z), ZT_ONHOOK);
+               }
+               tmp->inalarm = 0;
+               si.spanno = 0;
+               if (ioctl(zap_fd(tmp->z),ZT_SPANSTAT,&si) == -1) {
+                       ast_log(LOG_ERROR, "Unable to get span status: %s\n", strerror(errno));
+                       free(tmp);
+                       return NULL;
+               }
+               if (si.alarms) tmp->inalarm = 1;
+       }
+       return tmp;
+}
+
+static inline int available(struct zt_pvt *p, int channelmatch, int groupmatch)
+{
+       /* First, check group matching */
+       if ((p->group & groupmatch) != groupmatch)
+               return 0;
+       /* Check to see if we have a channel match */
+       if ((channelmatch > 0) && (p->channel != channelmatch))
+               return 0;
+               
+       /* If no owner definitely available */
+       if (!p->owner)
+               return 1;
+
+       /* If it's not an FXO, forget about call wait */
+       if ((p->sig != SIG_FXOKS) && (p->sig != SIG_FXOLS) && (p->sig != SIG_FXOGS)) 
+               return 0;
+
+       if (!p->callwaiting) {
+               /* If they don't have call waiting enabled, then for sure they're unavailable at this point */
+               return 0;
+       }
+
+       if (p->callwaitindex > -1) {
+               /* If there is already a call waiting call, then we can't take a second one */
+               return 0;
+       }
+       
+       if ((p->owner->state != AST_STATE_UP) &&
+               (p->owner->state != AST_STATE_RINGING)) {
+               /* If the current call is not up, then don't allow the call */
+               return 0;
+       }
+       if ((p->thirdcallindex > -1) && (p->owner == p->owners[p->thirdcallindex])) {
+               /* Can't take a call wait when the three way calling hasn't been merged yet. */
+               return 0;
+       }
+       /* We're cool */
+       return 1;
+}
+
+static struct ast_channel *zt_request(char *type, int format, void *data)
+{
+       int oldformat;
+       int groupmatch = 0;
+       int channelmatch = -1;
+       struct zt_pvt *p;
+       struct ast_channel *tmp = NULL;
+       char *dest=NULL;
+       int x;
+       char *s;
+       int callwait;
+       
+       /* We do signed linear */
+       oldformat = format;
+       format &= (AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
+       if (!format) {
+               ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
+               return NULL;
+       }
+       if (data) {
+               dest = strdup((char *)data);
+       } else {
+               ast_log(LOG_WARNING, "Channel requested with no data\n");
+               return NULL;
+       }
+       if (dest[0] == 'g') {
+               /* Retrieve the group number */
+               s = strtok(dest  + 1, "/");
+               if (sscanf(s, "%d", &x) != 1) {
+                       ast_log(LOG_WARNING, "Unable to determine group for data %s\n", (char *)data);
+                       free(dest);
+                       return NULL;
+               }
+               groupmatch = 1 << x;
+       } else {
+               s = strtok(dest, "/");
+               if (sscanf(s, "%d", &x) != 1) {
+                       ast_log(LOG_WARNING, "Unable to determine channel for data %s\n", (char *)data);
+                       free(dest);
+                       return NULL;
+               }
+               channelmatch = x;
+       }
+       /* Search for an unowned channel */
+       if (ast_pthread_mutex_lock(&iflock)) {
+               ast_log(LOG_ERROR, "Unable to lock interface list???\n");
+               return NULL;
+       }
+       p = iflist;
+       while(p && !tmp) {
+               if (available(p, channelmatch, groupmatch)) {
+                       if (option_debug)
+                               ast_log(LOG_DEBUG, "Using channel %d\n", p->channel);
+                               if (p->inalarm) {
+                                       p = p->next;
+                                       continue;
+                               }
+#ifdef ZAPATA_PRI
+               if (p->pri) 
+                               if (!(p->call = pri_new_call(p->pri->pri))) {
+                                       ast_log(LOG_WARNING, "Unable to create call on channel %d\n", p->channel);
+                                       break;
+                               }
+#endif
+                       callwait = (p->owner != NULL);
+                       tmp = zt_new(p, AST_STATE_RESERVED, 0, p->owner ? 1 : 0, 0);
+                       /* Note if the call is a call waiting call */
+                       if (callwait)
+                               tmp->cdrflags |= AST_CDR_CALLWAIT;
+                       break;
+               }
+               p = p->next;
+       }
+       ast_pthread_mutex_unlock(&iflock);
+       restart_monitor();
+       return tmp;
+}
+
+
+static int get_group(char *s)
+{
+       char *copy;
+       char *piece;
+       int start, finish,x;
+       int group = 0;
+       copy = strdup(s);
+       if (!copy) {
+               ast_log(LOG_ERROR, "Out of memory\n");
+               return 0;
+       }
+       piece = strtok(copy, ",");
+       while(piece) {
+               if (sscanf(piece, "%d-%d", &start, &finish) == 2) {
+                       /* Range */
+               } else if (sscanf(piece, "%d", &start)) {
+                       /* Just one */
+                       finish = start;
+               } else {
+                       ast_log(LOG_ERROR, "Syntax error parsing '%s' at '%s'.  Using '0'\n", s,piece);
+                       return 0;
+               }
+               piece = strtok(NULL, ",");
+               for (x=start;x<=finish;x++) {
+                       if ((x > 31) || (x < 0)) {
+                               ast_log(LOG_WARNING, "Ignoring invalid group %d\n", x);
+                       } else
+                               group |= (1 << x);
+               }
+       }
+       free(copy);
+       return group;
+}
+
+#ifdef ZAPATA_PRI
+
+static int pri_find_empty_chan(struct zt_pri *pri)
+{
+       int x;
+       for (x=23;x>0;x--) {
+               if (pri->pvt[x] && !pri->pvt[x]->owner)
+                       return x;
+       }
+       return 0;
+}
+
+static int pri_fixup(struct zt_pri *pri, int channel, q931_call *c)
+{
+       int x;
+       for (x=1;x<24;x++) {
+               if (!pri->pvt[x]) continue;
+               if (pri->pvt[x]->call == c) {
+                       /* Found our call */
+                       if (channel != x) {
+                               if (option_verbose > 2)
+                                       ast_verbose(VERBOSE_PREFIX_3 "Moving call from channel %d to channel %d\n",
+                                               x, channel);
+                               if (pri->pvt[channel]->owner) {
+                                       ast_log(LOG_WARNING, "Can't fix up channel from %d to %d because %d is already in use\n",
+                                               x, channel, channel);
+                                       return 0;
+                               }
+                               /* Fix it all up now */
+                               pri->pvt[channel]->owner = pri->pvt[x]->owner;
+                               pri->pvt[channel]->owner->pvt->pvt = pri->pvt[channel];
+                               pri->pvt[channel]->owner->fds[0] = zap_fd(pri->pvt[channel]->z);
+                               pri->pvt[channel]->call = pri->pvt[x]->call;
+                               
+                               /* Free up the old channel, now not in use */
+                               pri->pvt[x]->owner = NULL;
+                               pri->pvt[x]->call = NULL;
+                       }
+                       return channel;
+               }
+       }
+       return 0;
+}
+
+static void *pri_dchannel(void *vpri)
+{
+       struct zt_pri *pri = vpri;
+       pri_event *e;
+       fd_set efds;
+       fd_set rfds;
+       int res;
+       int chan;
+       int x;
+       struct ast_channel *c;
+       for(;;) {
+               FD_ZERO(&rfds);
+               FD_ZERO(&efds);
+               FD_SET(pri->fd, &rfds);
+               FD_SET(pri->fd, &efds);
+               res = select(pri->fd + 1, &rfds, NULL, &efds, pri_schedule_next(pri->pri));
+               pthread_mutex_lock(&pri->lock);
+               if (!res) {
+                       /* Just a timeout, run the scheduler */
+                       pri_schedule_run(pri->pri);
+               } else if (res > -1) {
+                       e = pri_check_event(pri->pri);
+                       if (e) {
+                               if (pri->debug)
+                                       pri_dump_event(pri->pri, e);
+                               switch(e->e) {
+                               case PRI_EVENT_DCHAN_UP:
+                                       if (option_verbose > 1) 
+                                               ast_verbose(VERBOSE_PREFIX_2 "D-Channel on span %d up\n", pri->span);
+                                       pri->up = 1;
+                                       break;
+                               case PRI_EVENT_DCHAN_DOWN:
+                                       if (option_verbose > 1) 
+                                               ast_verbose(VERBOSE_PREFIX_2 "D-Channel on span %d down\n", pri->span);
+                                       pri->up = 0;
+                                       break;
+                               case PRI_EVENT_RESTART:
+                                       chan = e->restart.channel;
+                                       if (chan > -1) {
+                                               if ((chan < 1) || (chan > 23) )
+                                                       ast_log(LOG_WARNING, "Restart requested on odd channel number %d on span %d\n", chan, pri->span);
+                                               else if (!pri->pvt[chan])
+                                                       ast_log(LOG_WARNING, "Restart requested on unconfigured channel %d on span %d\n", chan, pri->span);
+                                               else {
+                                                       if (option_verbose > 2)
+                                                               ast_verbose(VERBOSE_PREFIX_3 "B-channel %d restarted on span %d\n", 
+                                                                       chan, pri->span);
+                                                       /* Force soft hangup if appropriate */
+                                                       if (pri->pvt[chan]->owner)
+                                                               pri->pvt[chan]->owner->softhangup = 1;
+                                               }
+                                       } else {
+                                               if (option_verbose > 2)
+                                                       ast_verbose("Restart on requested on entire span %d\n", pri->span);
+                                               for (x=1;x<24;x++)
+                                                       if (pri->pvt[chan]->owner)
+                                                               pri->pvt[chan]->owner->softhangup = 1;
+                                       }
+                                       break;
+                               case PRI_EVENT_RING:
+                                       chan = e->ring.channel;
+                                       if ((chan < 1) || (chan > 23)) {
+                                               ast_log(LOG_WARNING, "Ring requested on odd channel number %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       } else if (!pri->pvt[chan]) {
+                                               ast_log(LOG_WARNING, "Ring requested on unconfigured channel %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       } else if (pri->pvt[chan]->owner) {
+                                               if (pri->pvt[chan]->call == e->ring.call) {
+                                                       ast_log(LOG_WARNING, "Duplicate setup requested on channel %d already in use on span %d\n", chan, pri->span);
+                                                       break;
+                                               } else {
+                                                       ast_log(LOG_WARNING, "Ring requested on channel %d already in use on span %d\n", chan, pri->span);
+                                                       chan = 0;
+                                               }
+                                       }
+                                       if (!chan && (e->ring.flexible))
+                                               chan = pri_find_empty_chan(pri);
+                                       if (chan) {
+                                               /* Get caller ID */
+                                               if (pri->pvt[chan]->use_callerid) 
+                                                       strncpy(pri->pvt[chan]->callerid, e->ring.callingnum, sizeof(pri->pvt[chan]->callerid));
+                                               else
+                                                       strcpy(pri->pvt[chan]->callerid, "");
+                                               /* Get called number */
+                                               if (strlen(e->ring.callednum)) {
+                                                       strncpy(pri->pvt[chan]->exten, e->ring.callednum, sizeof(pri->pvt[chan]->exten));
+                                               } else
+                                                       strcpy(pri->pvt[chan]->exten, "s");
+                                               /* Make sure extension exists */
+                                               if (ast_exists_extension(NULL, pri->pvt[chan]->context, pri->pvt[chan]->exten, 1, pri->pvt[chan]->callerid)) {
+                                                       /* Start PBX */
+                                                       pri->pvt[chan]->call = e->ring.call;
+                                                       c = zt_new(pri->pvt[chan], AST_STATE_RING, 1, 0, 0);
+                                                       if (c) {
+                                                               if (option_verbose > 2)
+                                                                       ast_verbose(VERBOSE_PREFIX_3 "Accepting call from '%s' to '%s' on channel %d, span %d\n",
+                                                                               e->ring.callingnum, pri->pvt[chan]->exten, chan, pri->span);
+                                                               pri_acknowledge(pri->pri, e->ring.call, chan, 0);
+                                                               zt_enable_ec(pri->pvt[chan]);
+                                                       } else {
+                                                               ast_log(LOG_WARNING, "Unable to start PBX on channel %d, span %d\n", chan, pri->span);
+                                                               pri_release(pri->pri, e->ring.call, PRI_CAUSE_SWITCH_CONGESTION);
+                                                               pri->pvt[chan]->call = 0;
+                                                       }
+                                               } else {
+                                                       if (option_verbose > 2) 
+                                                               ast_verbose(VERBOSE_PREFIX_3 "Extension '%s' in context '%s' does not exist.  Rejecting call on channel %d, span %d\n", 
+                                                                       pri->pvt[chan]->exten, pri->pvt[chan]->context, chan, pri->span);
+                                                       pri_release(pri->pri, e->ring.call, PRI_CAUSE_UNALLOCATED);
+                                               }
+                                       } else 
+                                               pri_release(pri->pri, e->ring.call, PRI_CAUSE_REQUESTED_CHAN_UNAVAIL);
+                                       break;
+                               case PRI_EVENT_RINGING:
+                                       chan = e->ringing.channel;
+                                       if ((chan < 1) || (chan > 23)) {
+                                               ast_log(LOG_WARNING, "Ringing requested on odd channel number %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       } else if (!pri->pvt[chan]) {
+                                               ast_log(LOG_WARNING, "Ringing requested on unconfigured channel %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       }
+                                       if (chan) {
+                                               chan = pri_fixup(pri, chan, e->ringing.call);
+                                               if (!chan) {
+                                                       ast_log(LOG_WARNING, "Ringing requested on channel %d not in use on span %d\n", e->ringing.channel, pri->span);
+                                                       chan = 0;
+                                               } else
+                                                       pri->pvt[chan]->needringing[0] =1;
+                                       }
+                                       zt_enable_ec(pri->pvt[chan]);
+                                       break;                          
+                               case PRI_EVENT_ANSWER:
+                                       chan = e->answer.channel;
+                                       if ((chan < 1) || (chan > 23)) {
+                                               ast_log(LOG_WARNING, "Answer on odd channel number %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       } else if (!pri->pvt[chan]) {
+                                               ast_log(LOG_WARNING, "Answer on unconfigured channel %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       }
+                                       if (chan) {
+                                               chan = pri_fixup(pri, chan, e->ringing.call);
+                                               if (!chan) {
+                                                       ast_log(LOG_WARNING, "Ring requested on channel %d not in use on span %d\n", chan, pri->span);
+                                                       chan = 0;
+                                               } else
+                                                       pri->pvt[chan]->needanswer[0] =1;
+                                       }
+                                       break;                          
+                               case PRI_EVENT_HANGUP:
+                                       chan = e->hangup.channel;
+                                       if ((chan < 1) || (chan > 23)) {
+                                               ast_log(LOG_WARNING, "Hangup requested on odd channel number %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       } else if (!pri->pvt[chan]) {
+                                               ast_log(LOG_WARNING, "Hanngup requested on unconfigured channel %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       }
+                                       if (chan) {
+                                               chan = pri_fixup(pri, chan, e->hangup.call);
+                                               if (chan) {
+                                                       if (pri->pvt[chan]->owner) {
+                                                               if (option_verbose > 3) 
+                                                                       ast_verbose(VERBOSE_PREFIX_3, "Channel %d, span %d got hangup\n", chan, pri->span);
+                                                               pri->pvt[chan]->owner->softhangup = 1;
+                                                       }
+                                               }
+                                       }
+                                       break;
+                               case PRI_EVENT_HANGUP_ACK:
+                                       chan = e->hangup.channel;
+                                       if ((chan < 1) || (chan > 23)) {
+                                               ast_log(LOG_WARNING, "Hangup ACK requested on odd channel number %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       } else if (!pri->pvt[chan]) {
+                                               ast_log(LOG_WARNING, "Hanngup ACK requested on unconfigured channel %d span %d\n", chan, pri->span);
+                                               chan = 0;
+                                       }
+                                       if (chan) {
+                                               chan = pri_fixup(pri, chan, e->hangup.call);
+                                               if (chan) {
+                                                       if (pri->pvt[chan]->owner) {
+                                                               if (option_verbose > 3) 
+                                                                       ast_verbose(VERBOSE_PREFIX_3, "Channel %d, span %d got hangup ACK\n", chan, pri->span);
+                                                               pri->pvt[chan]->call = NULL;
+                                                       }
+                                               }
+                                       }
+                                       break;
+                               case PRI_EVENT_CONFIG_ERR:
+                                       ast_log(LOG_WARNING, "PRI Error: %s\n", e->err.err);
+                                       break;
+                               default:
+                                       ast_log(LOG_DEBUG, "Event: %d\n", e->e);
+                               }
+                       } else {
+                               /* Check for an event */
+                               x = 0;
+                               res = ioctl(pri->fd, ZT_GETEVENT, &x);
+                               if (x) 
+                                       printf("PRI got event: %d\n", x);
+                               if (option_debug)
+                                       ast_log(LOG_DEBUG, "Got event %s (%d) on D-channel for span %d\n", event2str(x), x, pri->span);
+                       }
+               } else {
+                       if (errno != EINTR) 
+                               ast_log(LOG_WARNING, "pri_event returned error %d (%s)\n", errno, strerror(errno));
+               }
+               pthread_mutex_unlock(&pri->lock);
+       }
+       /* Never reached */
+       return NULL;
+}
+
+static int start_pri(struct zt_pri *pri)
+{
+       char filename[80];
+       int res;
+       ZT_PARAMS p;
+       ZT_BUFFERINFO bi;
+       snprintf(filename, sizeof(filename), "/dev/zap/%d", pri->offset + 24);
+       pri->fd = open(filename, O_RDWR, 0600);
+       if (pri->fd < 0) {
+               ast_log(LOG_ERROR, "Unable to open D-channel %s (%s)\n", filename, strerror(errno));
+               return -1;
+       }
+       res = ioctl(pri->fd, ZT_GET_PARAMS, &p);
+       if (res) {
+               close(pri->fd);
+               pri->fd = -1;
+               ast_log(LOG_ERROR, "Unable to get parameters for D-channel %s (%s)\n", filename, strerror(errno));
+               return -1;
+       }
+       if (p.sigtype != ZT_SIG_HDLCFCS) {
+               close(pri->fd);
+               pri->fd = -1;
+               ast_log(LOG_ERROR, "D-channel %s is not in HDLC/FCS mode.  See /etc/tormenta.conf\n", filename);
+               return -1;
+       }
+       bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
+       bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
+       bi.numbufs = 4;
+       bi.bufsize = 1024;
+       if (ioctl(pri->fd, ZT_SET_BUFINFO, &bi)) {
+               ast_log(LOG_ERROR, "Unable to set appropriate buffering on %s\n", filename);
+               close(pri->fd);
+               pri->fd = -1;
+               return -1;
+       }
+       pri->pri = pri_new(pri->fd, pri->nodetype, pri->switchtype);
+       if (!pri->pri) {
+               close(pri->fd);
+               pri->fd = -1;
+               ast_log(LOG_ERROR, "Unable to create PRI structure\n");
+               return -1;
+       }
+       pri_set_debug(pri->pri, DEFAULT_PRI_DEBUG);
+       if (pthread_create(&pri->master, NULL, pri_dchannel, pri)) {
+               close(pri->fd);
+               pri->fd = -1;
+               ast_log(LOG_ERROR, "Unable to spawn D-channel: %s\n", strerror(errno));
+               return -1;
+       }
+       return 0;
+}
+
+static char *complete_span(char *line, char *word, int pos, int state)
+{
+       int span=1;
+       char tmp[50];
+       while(span <= NUM_SPANS) {
+               if (span > state)
+                       break;
+               span++;
+       }
+       if (span <= NUM_SPANS) {
+               snprintf(tmp, sizeof(tmp), "%d", span);
+               return strdup(tmp);
+       } else
+               return NULL;
+}
+
+static int handle_pri_debug(int fd, int argc, char *argv[])
+{
+       int span;
+       span = atoi(argv[3]);
+       if ((span < 1) || (span > NUM_SPANS)) {
+               ast_cli(fd, "Invalid span %s.  Should be a number %d to %d\n", argv[3], 1, NUM_SPANS);
+               return RESULT_SUCCESS;
+       }
+       if (!pris[span-1].pri) {
+               ast_cli(fd, "No PRI running on span %d\n", span);
+               return RESULT_SUCCESS;
+       }
+       pri_set_debug(pris[span-1].pri, PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q931_STATE);
+       ast_cli(fd, "Enabled debugging on span %d\n", span);
+       return RESULT_SUCCESS;
+}
+
+static int handle_pri_no_debug(int fd, int argc, char *argv[])
+{
+       int span;
+       span = atoi(argv[4]);
+       if ((span < 1) || (span > NUM_SPANS)) {
+               ast_cli(fd, "Invalid span %s.  Should be a number %d to %d\n", argv[4], 1, NUM_SPANS);
+               return RESULT_SUCCESS;
+       }
+       if (!pris[span-1].pri) {
+               ast_cli(fd, "No PRI running on span %d\n", span);
+               return RESULT_SUCCESS;
+       }
+       pri_set_debug(pris[span-1].pri, 0);
+       ast_cli(fd, "Disabled debugging on span %d\n", span);
+       return RESULT_SUCCESS;
+}
+
+static char pri_debug_help[] = 
+       "Usage: pri debug span <span>\n"
+       "       Enables debugging on a given PRI span\n";
+       
+static char pri_no_debug_help[] = 
+       "Usage: pri no debug span <span>\n"
+       "       Disables debugging on a given PRI span\n";
+
+#if 0
+static struct ast_cli_entry cli_show_channel = {
+       {"zap", "show", "channel", NULL}, zap_show_channel, "Show the detailed status of a single zapata channel", show_channel_usage
+};
+#endif
+
+static struct ast_cli_entry pri_debug = {
+       { "pri", "debug", "span", NULL }, handle_pri_debug, "Enables PRI debugging on a span", pri_debug_help, complete_span 
+};
+
+static struct ast_cli_entry pri_no_debug = {
+       { "pri", "no", "debug", "span", NULL }, handle_pri_no_debug, "Enables PRI debugging on a span", pri_no_debug_help, complete_span };
+
+#endif /* ZAPATA_PRI */
+
+
+static int zap_destroy_channel(int fd, int argc, char **argv)
+{
+       int channel = 0;
+       struct zt_pvt *tmp = NULL;
+       struct zt_pvt *prev = NULL;
+       
+       if (argc != 4) {
+               return RESULT_SHOWUSAGE;
+       }
+       channel = atoi(argv[3]);
+
+       tmp = iflist;
+       while (tmp) {
+               if (tmp->channel == channel) {
+                       destroy_channel(prev, tmp, 1);
+                       return RESULT_SUCCESS;
+               }
+               prev = tmp;
+               tmp = tmp->next;
+       }
+       return RESULT_FAILURE;
+}
+
+static int zap_show_channels(int fd, int argc, char **argv)
+{
+#define FORMAT "%3d %-10.10s %-10.10s %-10.10s\n"
+#define FORMAT2 "%3s %-10.10s %-10.10s %-10.10s\n"
+       struct zt_pvt *tmp = NULL;
+
+       if (argc != 3)
+               return RESULT_SHOWUSAGE;
+
+       ast_pthread_mutex_lock(&iflock);
+       ast_cli(fd, FORMAT2, "Chan. Num.", "Extension", "Context", "Language");
+       
+       tmp = iflist;
+       while (tmp) {
+               ast_cli(fd, FORMAT, tmp->channel, tmp->exten, tmp->context, tmp->language);
+               tmp = tmp->next;
+       }
+       ast_pthread_mutex_unlock(&iflock);
+       return RESULT_SUCCESS;
+#undef FORMAT
+#undef FORMAT2
+}
+
+static int zap_show_channel(int fd, int argc, char **argv)
+{
+       int channel;
+       struct zt_pvt *tmp = NULL;
+
+       if (argc != 4)
+               return RESULT_SHOWUSAGE;
+       channel = atoi(argv[3]);
+
+       ast_pthread_mutex_lock(&iflock);
+       tmp = iflist;
+       while (tmp) {
+               if (tmp->channel == channel) {
+                       ast_cli(fd, "Channel: %d\n", tmp->channel);
+                       ast_cli(fd, "Span: %d\n", tmp->span);
+                       ast_cli(fd, "Extension: %s\n", tmp->exten);
+                       ast_cli(fd, "Context: %s\n", tmp->context);
+                       ast_cli(fd, "Caller ID string: %s\n", tmp->callerid);
+                       ast_cli(fd, "Destroy: %d\n", tmp->destroy);
+                       ast_cli(fd, "Signalling Type: %s\n", sig2str(tmp->sig));
+                       ast_pthread_mutex_unlock(&iflock);
+                       return RESULT_SUCCESS;
+               }
+               tmp = tmp->next;
+       }
+       
+       ast_cli(fd, "Unable to find given channel %d\n", channel);
+       ast_pthread_mutex_unlock(&iflock);
+       return RESULT_FAILURE;
+}
+
+                       
+
+static char show_channels_usage[] =
+       "Usage: zap show channels\n"
+       "       Shows a list of available channels\n";
+
+static char show_channel_usage[] =
+       "Usage: zap show channel <chan num>\n"
+       "       Detailed information about a given channel\n";
+static char destroy_channel_usage[] =
+       "Usage: zap destroy channel <chan num>\n"
+       "       DON'T USE THIS UNLESS YOU KNOW WHAT YOU ARE DOING.  Immediately removes a given channel, whether it is in use or not\n";
+
+static struct ast_cli_entry cli_show_channels = { 
+       {"zap", "show", "channels", NULL}, zap_show_channels, "Show active zapata channels", show_channels_usage, NULL };
+
+static struct ast_cli_entry cli_show_channel = { 
+       {"zap", "show", "channel", NULL}, zap_show_channel, "Show information on a channel", show_channel_usage, NULL };
+
+static struct ast_cli_entry cli_destroy_channel = { 
+       {"zap", "destroy", "channel", NULL}, zap_destroy_channel, "Destroy a channel", destroy_channel_usage, NULL };
+
+int load_module()
+{
+       struct ast_config *cfg;
+       struct ast_variable *v;
+       struct zt_pvt *tmp;
+       char *chan;
+       int start, finish,x;
+#ifdef ZAPATA_PRI
+       int y;
+#endif
+
+#ifdef ZAPATA_PRI
+       memset(pris, 0, sizeof(pris));
+       for (y=0;y<NUM_SPANS;y++)
+               pris[y].fd = -1;
+#endif
+       
+       cfg = ast_load(config);
+
+       /* We *must* have a config file otherwise stop immediately */
+       if (!cfg) {
+               ast_log(LOG_ERROR, "Unable to load config %s\n", config);
+               return -1;
+       }
+       
+
+       if (ast_pthread_mutex_lock(&iflock)) {
+               /* It's a little silly to lock it, but we mind as well just to be sure */
+               ast_log(LOG_ERROR, "Unable to lock interface list???\n");
+               return -1;
+       }
+       v = ast_variable_browse(cfg, "channels");
+       while(v) {
+               /* Create the interface list */
+               if (!strcasecmp(v->name, "channel")) {
+                       if (cur_signalling < 0) {
+                               ast_log(LOG_ERROR, "Signalling must be specified before any channels are.\n");
+                               ast_destroy(cfg);
+                               ast_pthread_mutex_unlock(&iflock);
+                               unload_module();
+                               return -1;
+                       }
+                       chan = strtok(v->value, ",");
+                       while(chan) {
+                               if (sscanf(chan, "%d-%d", &start, &finish) == 2) {
+                                       /* Range */
+                               } else if (sscanf(chan, "%d", &start)) {
+                                       /* Just one */
+                                       finish = start;
+                               } else {
+                                       ast_log(LOG_ERROR, "Syntax error parsing '%s' at '%s'\n", v->value, chan);
+                                       ast_destroy(cfg);
+                                       ast_pthread_mutex_unlock(&iflock);
+                                       unload_module();
+                                       return -1;
+                               }
+                               if (finish < start) {
+                                       ast_log(LOG_WARNING, "Sillyness: %d < %d\n", start, finish);
+                                       x = finish;
+                                       finish = start;
+                                       start = x;
+                               }
+                               for (x=start;x<=finish;x++) {
+                                       tmp = mkintf(x, cur_signalling);
+                                       if (tmp) {
+                                               if (option_verbose > 2)
+                                                       ast_verbose(VERBOSE_PREFIX_3 "Registered channel %d, %s signalling\n", x, sig2str(tmp->sig));
+                                       } else {
+                                               ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
+                                               ast_destroy(cfg);
+                                               ast_pthread_mutex_unlock(&iflock);
+                                               unload_module();
+                                               return -1;
+                                       }
+                               }
+                               chan = strtok(NULL, ",");
+                       }
+               } else if (!strcasecmp(v->name, "usecallerid")) {
+                       use_callerid = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "threewaycalling")) {
+                       threewaycalling = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "transfer")) {
+                       transfer = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "echocancel")) {
+                       echocancel = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "hidecallerid")) {
+                       hidecallerid = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "callwaiting")) {
+                       callwaiting = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "callwaitingcallerid")) {
+                       callwaitingcallerid = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "context")) {
+                       strncpy(context, v->value, sizeof(context));
+               } else if (!strcasecmp(v->name, "language")) {
+                       strncpy(language, v->value, sizeof(language));
+               } else if (!strcasecmp(v->name, "stripmsd")) {
+                       stripmsd = atoi(v->value);
+               } else if (!strcasecmp(v->name, "group")) {
+                       cur_group = get_group(v->value);
+               } else if (!strcasecmp(v->name, "callgroup")) {
+                       cur_callergroup = get_group(v->value);
+               } else if (!strcasecmp(v->name, "pickupgroup")) {
+                       cur_pickupgroup = get_group(v->value);
+               } else if (!strcasecmp(v->name, "immediate")) {
+                       immediate = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "rxgain")) {
+                       if (sscanf(v->value, "%f", &rxgain) != 1) {
+                               ast_log(LOG_WARNING, "Invalid rxgain: %s\n", v->value);
+                       }
+               } else if (!strcasecmp(v->name, "txgain")) {
+                       if (sscanf(v->value, "%f", &txgain) != 1) {
+                               ast_log(LOG_WARNING, "Invalid txgain: %s\n", v->value);
+                       }
+               } else if (!strcasecmp(v->name, "callerid")) {
+                       if (!strcasecmp(v->value, "asreceived"))
+                               strcpy(callerid,"");
+                       else
+                               strncpy(callerid, v->value, sizeof(callerid));
+               } else if (!strcasecmp(v->name, "signalling")) {
+                       if (!strcasecmp(v->value, "em")) {
+                               cur_signalling = SIG_EM;
+                       } else if (!strcasecmp(v->value, "em_w")) {
+                               cur_signalling = SIG_EMWINK;
+                       } else if (!strcasecmp(v->value, "fxs_ls")) {
+                               cur_signalling = SIG_FXSLS;
+                       } else if (!strcasecmp(v->value, "fxs_gs")) {
+                               cur_signalling = SIG_FXSGS;
+                       } else if (!strcasecmp(v->value, "fxs_ks")) {
+                               cur_signalling = SIG_FXSKS;
+                       } else if (!strcasecmp(v->value, "fxo_ls")) {
+                               cur_signalling = SIG_FXOLS;
+                       } else if (!strcasecmp(v->value, "fxo_gs")) {
+                               cur_signalling = SIG_FXOGS;
+                       } else if (!strcasecmp(v->value, "fxo_ks")) {
+                               cur_signalling = SIG_FXOKS;
+                       } else if (!strcasecmp(v->value, "featd")) {
+                               cur_signalling = SIG_FEATD;
+#ifdef ZAPATA_PRI
+                       } else if (!strcasecmp(v->value, "pri_net")) {
+                               cur_signalling = SIG_PRI;
+                               pritype = PRI_NETWORK;
+                       } else if (!strcasecmp(v->value, "pri_cpe")) {
+                               cur_signalling = SIG_PRI;
+                               pritype = PRI_CPE;
+#endif
+                       } else {
+                               ast_log(LOG_ERROR, "Unknown signalling method '%s'\n", v->value);
+                       }
+#ifdef ZAPATA_PRI
+               } else if (!strcasecmp(v->name, "switchtype")) {
+                       if (!strcasecmp(v->value, "national")) 
+                               switchtype = PRI_SWITCH_NI2;
+                       else if (!strcasecmp(v->value, "dms100"))
+                               switchtype = PRI_SWITCH_DMS100;
+                       else if (!strcasecmp(v->value, "4ess"))
+                               switchtype = PRI_SWITCH_ATT4ESS;
+                       else if (!strcasecmp(v->value, "5ess"))
+                               switchtype = PRI_SWITCH_LUCENT5E;
+                       else {
+                               ast_log(LOG_ERROR, "Unknown switchtype '%s'\n", v->value);
+                               ast_destroy(cfg);
+                               ast_pthread_mutex_unlock(&iflock);
+                               unload_module();
+                               return -1;
+                       }
+#endif         
+               } else
+                       ast_log(LOG_DEBUG, "Ignoring %s\n", v->name);
+               v = v->next;
+       }
+       ast_pthread_mutex_unlock(&iflock);
+       /* Make sure we can register our Zap channel type */
+       if (ast_channel_register(type, tdesc, AST_FORMAT_SLINEAR |  AST_FORMAT_ULAW, zt_request)) {
+               ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
+               ast_destroy(cfg);
+               unload_module();
+               return -1;
+       }
+       if (ast_channel_register(typecompat, tdesc, AST_FORMAT_SLINEAR |  AST_FORMAT_ULAW, zt_request)) {
+               ast_log(LOG_ERROR, "Unable to register channel class %s\n", typecompat);
+               ast_destroy(cfg);
+               unload_module();
+               return -1;
+       }
+       ast_destroy(cfg);
+#ifdef ZAPATA_PRI
+       for (x=0;x<NUM_SPANS;x++) {
+               for (y=1;y<23;y++) {
+                       if (pris[x].chanmask[y]) {
+                               pris[x].offset = x * 24;
+                               pris[x].span = x + 1;
+                               if (start_pri(pris + x)) {
+                                       ast_log(LOG_ERROR, "Unable to start D-channel on span %d\n", x + 1);
+                                       return -1;
+                               } else if (option_verbose > 1) 
+                                       ast_verbose(VERBOSE_PREFIX_2 "Starting D-Channel on span %d\n", x + 1);
+                               break;
+                       }
+               }
+       }
+       ast_cli_register(&pri_debug);
+       ast_cli_register(&pri_no_debug);
+#endif 
+       ast_cli_register(&cli_show_channels);
+       ast_cli_register(&cli_show_channel);
+       ast_cli_register(&cli_destroy_channel);
+       /* And start the monitor for the first time */
+       restart_monitor();
+       return 0;
+}
+
+int unload_module()
+{
+       struct zt_pvt *p, *pl;
+       /* First, take us out of the channel loop */
+       ast_channel_unregister(type);
+       ast_channel_unregister(typecompat);
+       ast_cli_unregister(&cli_show_channels);
+       ast_cli_unregister(&cli_show_channel);
+       ast_cli_unregister(&cli_destroy_channel);
+       if (!ast_pthread_mutex_lock(&iflock)) {
+               /* Hangup all interfaces if they have an owner */
+               p = iflist;
+               while(p) {
+                       if (p->owner)
+                               ast_softhangup(p->owner);
+                       p = p->next;
+               }
+               iflist = NULL;
+               ast_pthread_mutex_unlock(&iflock);
+       } else {
+               ast_log(LOG_WARNING, "Unable to lock the monitor\n");
+               return -1;
+       }
+       if (!ast_pthread_mutex_lock(&monlock)) {
+               if (monitor_thread) {
+                       pthread_cancel(monitor_thread);
+                       pthread_kill(monitor_thread, SIGURG);
+                       pthread_join(monitor_thread, NULL);
+               }
+               monitor_thread = -2;
+               ast_pthread_mutex_unlock(&monlock);
+       } else {
+               ast_log(LOG_WARNING, "Unable to lock the monitor\n");
+               return -1;
+       }
+
+       if (!ast_pthread_mutex_lock(&iflock)) {
+               /* Destroy all the interfaces and free their memory */
+               p = iflist;
+               while(p) {
+                       /* Free any callerid */
+                       if (p->cidspill)
+                               free(p->cidspill);
+                       /* Close the zapata thingy */
+                       if (p->z)
+                               zap_close(p->z);
+                       pl = p;
+                       p = p->next;
+                       /* Free associated memory */
+                       free(pl);
+               }
+               iflist = NULL;
+               ast_pthread_mutex_unlock(&iflock);
+       } else {
+               ast_log(LOG_WARNING, "Unable to lock the monitor\n");
+               return -1;
+       }
+               
+       return 0;
+}
+
+static int reload_zt(void)
+{
+       struct ast_config *cfg;
+       struct ast_variable *v;
+       struct zt_pvt *tmp;
+       struct zt_pvt *prev = NULL;
+       char *chan;
+       int start, finish,x;
+
+       /* Some crap that needs to be reinitialized on the reload */
+       strcpy(context, "default");
+       language[0] = '\0'; 
+       use_callerid = 1;
+       cur_signalling = -1;
+       cur_group = 0;
+       cur_callergroup = 0;
+       cur_pickupgroup = 0;
+       immediate = 0;
+       stripmsd = 0;
+       callwaiting = 0;
+       callwaitingcallerid = 0;
+       hidecallerid = 0;
+       threewaycalling = 0;
+       transfer = 0;
+       rxgain = 0.0;
+       txgain = 0.0;
+       firstdigittimeout = 16000;
+       gendigittimeout = 8000;
+//     usecnt = 0;
+
+#if 0
+#ifdef ZAPATA_PRI
+       int y;
+#endif
+#endif
+
+       
+#if 0
+#ifdef ZAPATA_PRI
+       memset(pris, 0, sizeof(pris));
+       for (y=0;y<NUM_SPANS;y++)
+               pris[y].fd = -1;
+#endif
+#endif /* 0 */
+       
+       cfg = ast_load(config);
+
+       /* We *must* have a config file otherwise stop immediately */
+       if (!cfg) {
+               ast_log(LOG_ERROR, "Unable to load config %s\n", config);
+               return -1;
+       }
+       
+
+       if (ast_pthread_mutex_lock(&iflock)) {
+               /* It's a little silly to lock it, but we mind as well just to be sure */
+               ast_log(LOG_ERROR, "Unable to lock interface list???\n");
+               return -1;
+       }
+       
+       /* Part of the primary changes for the reload... */
+       tmp = iflist;
+       
+       while (tmp) {
+               tmp->destroy = 1;
+               tmp = tmp->next;
+       }
+
+       v = ast_variable_browse(cfg, "channels");
+       
+       while(v) {
+               /* Create the interface list */
+               if (!strcasecmp(v->name, "channel")) {
+                       if (cur_signalling < 0) {
+                               ast_log(LOG_ERROR, "Signalling must be specified before any channels are.\n");
+                               ast_destroy(cfg);
+                               ast_pthread_mutex_unlock(&iflock);
+                               return -1;
+                       }
+                       chan = strtok(v->value, ",");
+                       while(chan) {
+                               if (sscanf(chan, "%d-%d", &start, &finish) == 2) {
+                                       /* Range */
+                               } else if (sscanf(chan, "%d", &start)) {
+                                       /* Just one */
+                                       finish = start;
+                               } else {
+                                       ast_log(LOG_ERROR, "Syntax error parsing '%s' at '%s'\n", v->value, chan);
+                                       ast_destroy(cfg);
+                                       ast_pthread_mutex_unlock(&iflock);
+                                       return -1;
+                               }
+                               if (finish < start) {
+                                       ast_log(LOG_WARNING, "Sillyness: %d < %d\n", start, finish);
+                                       x = finish;
+                                       finish = start;
+                                       start = x;
+                               }
+                               for (x = start; x <= finish; x++) {
+                                       tmp = mkintf(x, cur_signalling);
+                                       if (tmp) {
+                                               if (option_verbose > 2)
+                                                       ast_verbose(VERBOSE_PREFIX_3 "Registered channel %d, %s signalling\n", x, sig2str(tmp->sig));
+                                       } else {
+                                               ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
+                                               ast_destroy(cfg);
+                                               ast_pthread_mutex_unlock(&iflock);
+                                               return -1;
+                                       }
+                               }
+                               chan = strtok(NULL, ",");
+                       }
+               } else if (!strcasecmp(v->name, "usecallerid")) {
+                       use_callerid = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "threewaycalling")) {
+                       threewaycalling = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "transfer")) {
+                       transfer = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "echocancel")) {
+                       echocancel = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "hidecallerid")) {
+                       hidecallerid = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "callwaiting")) {
+                       callwaiting = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "callwaitingcallerid")) {
+                       callwaitingcallerid = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "context")) {
+                       strncpy(context, v->value, sizeof(context));
+               } else if (!strcasecmp(v->name, "language")) {
+                       strncpy(language, v->value, sizeof(language));
+               } else if (!strcasecmp(v->name, "stripmsd")) {
+                       stripmsd = atoi(v->value);
+               } else if (!strcasecmp(v->name, "group")) {
+                       cur_group = get_group(v->value);
+               } else if (!strcasecmp(v->name, "callgroup")) {
+                       cur_callergroup = get_group(v->value);
+               } else if (!strcasecmp(v->name, "pickupgroup")) {
+                       cur_pickupgroup = get_group(v->value);
+               } else if (!strcasecmp(v->name, "immediate")) {
+                       immediate = ast_true(v->value);
+               } else if (!strcasecmp(v->name, "rxgain")) {
+                       if (sscanf(v->value, "%f", &rxgain) != 1) {
+                               ast_log(LOG_WARNING, "Invalid rxgain: %s\n", v->value);
+                       }
+               } else if (!strcasecmp(v->name, "txgain")) {
+                       if (sscanf(v->value, "%f", &txgain) != 1) {
+                               ast_log(LOG_WARNING, "Invalid txgain: %s\n", v->value);
+                       }
+               } else if (!strcasecmp(v->name, "callerid")) {
+                       if (!strcasecmp(v->value, "asreceived"))
+                               strcpy(callerid,"");
+                       else
+                               strncpy(callerid, v->value, sizeof(callerid));
+               } else if (!strcasecmp(v->name, "signalling")) {
+                       if (!strcasecmp(v->value, "em")) {
+                               cur_signalling = SIG_EM;
+                       } else if (!strcasecmp(v->value, "em_w")) {
+                               cur_signalling = SIG_EMWINK;
+                       } else if (!strcasecmp(v->value, "fxs_ls")) {
+                               cur_signalling = SIG_FXSLS;
+                       } else if (!strcasecmp(v->value, "fxs_gs")) {
+                               cur_signalling = SIG_FXSGS;
+                       } else if (!strcasecmp(v->value, "fxs_ks")) {
+                               cur_signalling = SIG_FXSKS;
+                       } else if (!strcasecmp(v->value, "fxo_ls")) {
+                               cur_signalling = SIG_FXOLS;
+                       } else if (!strcasecmp(v->value, "fxo_gs")) {
+                               cur_signalling = SIG_FXOGS;
+                       } else if (!strcasecmp(v->value, "fxo_ks")) {
+                               cur_signalling = SIG_FXOKS;
+                       } else if (!strcasecmp(v->value, "featd")) {
+                               cur_signalling = SIG_FEATD;
+#ifdef ZAPATA_PRI
+                       } else if (!strcasecmp(v->value, "pri_net")) {
+                               cur_signalling = SIG_PRI;
+                               pritype = PRI_NETWORK;
+                       } else if (!strcasecmp(v->value, "pri_cpe")) {
+                               cur_signalling = SIG_PRI;
+                               pritype = PRI_CPE;
+#endif
+                       } else {
+                               ast_log(LOG_ERROR, "Unknown signalling method '%s'\n", v->value);
+                       }
+#ifdef ZAPATA_PRI
+               } else if (!strcasecmp(v->name, "switchtype")) {
+                       if (!strcasecmp(v->value, "national")) 
+                               switchtype = PRI_SWITCH_NI2;
+                       else if (!strcasecmp(v->value, "dms100"))
+                               switchtype = PRI_SWITCH_DMS100;
+                       else if (!strcasecmp(v->value, "4ess"))
+                               switchtype = PRI_SWITCH_ATT4ESS;
+                       else if (!strcasecmp(v->value, "5ess"))
+                               switchtype = PRI_SWITCH_LUCENT5E;
+                       else {
+                               ast_log(LOG_ERROR, "Unknown switchtype '%s'\n", v->value);
+                               ast_destroy(cfg);
+                               ast_pthread_mutex_unlock(&iflock);
+                               return -1;
+                       }
+#endif         
+               } else
+                       ast_log(LOG_DEBUG, "Ignoring %s\n", v->name);
+               v = v->next;
+       }
+
+       tmp = iflist;
+       prev = NULL;
+
+       while (tmp) {
+               if (tmp->destroy) {
+                       if (destroy_channel(prev, tmp, 0)) {
+                               ast_log(LOG_ERROR, "Unable to destroy chan_zap channel %d\n", tmp->channel);
+                               ast_pthread_mutex_unlock(&iflock);
+                               return -1;
+                       }
+                       tmp = tmp->next;
+               } else {
+                       prev = tmp;
+                       tmp = tmp->next;
+               }
+       }
+
+       ast_pthread_mutex_unlock(&iflock);
+
+       ast_destroy(cfg);
+#if 0
+#ifdef ZAPATA_PRI
+       for (x=0;x<NUM_SPANS;x++) {
+               for (y=1;y<23;y++) {
+                       if (pris[x].chanmask[y]) {
+                               pris[x].offset = x * 24;
+                               pris[x].span = x + 1;
+                               if (start_pri(pris + x)) {
+                                       ast_log(LOG_ERROR, "Unable to start D-channel on span %d\n", x + 1);
+                                       return -1;
+                               } else if (option_verbose > 1) 
+                                       ast_verbose(VERBOSE_PREFIX_2 "Starting D-Channel on span %d\n", x + 1);
+                               break;
+                       }
+               }
+       }
+#endif
+#endif
+       /* And start the monitor for the first time */
+
+       restart_monitor();
+       return 0;
+}
+
+#if 0
+/* XXX Very broken on PRI XXX */
+int reload(void)
+{
+       if (reload_zt()) {
+               ast_log(LOG_WARNING, "Reload of chan_zap is unsuccessful\n");
+               return -1;
+       }
+
+       return 0;
+}
+#endif
+int usecount()
+{
+       int res;
+       ast_pthread_mutex_lock(&usecnt_lock);
+       res = usecnt;
+       ast_pthread_mutex_unlock(&usecnt_lock);
+       return res;
+}
+
+char *description()
+{
+       return desc;
+}
+
+char *key()
+{
+       return ASTERISK_GPL_KEY;
+}