Version 0.1.8 from FTP
authorMark Spencer <markster@digium.com>
Mon, 7 May 2001 00:43:32 +0000 (00:43 +0000)
committerMark Spencer <markster@digium.com>
Mon, 7 May 2001 00:43:32 +0000 (00:43 +0000)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@314 65c4cc65-6c06-0410-ace0-fbb531ad65f3

callerid.c
channel.c
include/asterisk/channel.h
include/asterisk/channel_pvt.h

index 034b4e8..f78714f 100755 (executable)
@@ -24,6 +24,8 @@
 #include <asterisk/callerid.h>
 #include <asterisk/logger.h>
 #include <asterisk/fskmodem.h>
+#include "sas.h"
+#include "cas.h"
 
 
 struct callerid_state {
@@ -96,6 +98,33 @@ void callerid_get(struct callerid_state *cid, char **name, char **number, int *f
                *number = cid->number;
 }
 
+int ast_callerid_gen_cas(unsigned char *outbuf, int len)
+{
+       int pos = 0;
+       int cnt;
+       int saslen=2400;
+       if (len < saslen)
+               return -1;
+       while(saslen) {
+               cnt = saslen;
+               if (cnt > sizeof(sas))
+                       cnt = sizeof(sas);
+               memcpy(outbuf + pos, sas, cnt);
+               pos += cnt;
+               len -= cnt;
+               saslen -= cnt;
+       }
+       while(len) {
+               cnt = len;
+               if (cnt > sizeof(cas))
+                       cnt = sizeof(cas);
+               memcpy(outbuf + pos, cas, cnt);
+               pos += cnt;
+               len -= cnt;
+       }
+       return 0;
+}
+
 int callerid_feed(struct callerid_state *cid, unsigned char *ubuf, int len)
 {
        int mylen = len;
@@ -363,7 +392,7 @@ static inline float callerid_getcarrier(float *cr, float *ci, int bit)
        PUT_CLID_BAUD(1);       /* Stop bit */ \
 } while(0);    
 
-int callerid_generate(unsigned char *buf, char *number, char *name, int flags)
+int callerid_generate(unsigned char *buf, char *number, char *name, int flags, int callwaiting)
 {
        int bytes=0;
        int x, sum;
@@ -373,11 +402,14 @@ int callerid_generate(unsigned char *buf, char *number, char *name, int flags)
        float scont = 0.0;
        char msg[256];
        callerid_genmsg(msg, sizeof(msg), number, name, flags);
-       for (x=0;x<4000;x++)
-               PUT_BYTE(0x7f);
-       /* Transmit 30 0x55's (looks like a square wave */
-       for (x=0;x<30;x++)
-               PUT_CLID(0x55);
+       if (!callwaiting) {
+               /* Wait a half a second */
+               for (x=0;x<4000;x++)
+                       PUT_BYTE(0x7f);
+               /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
+               for (x=0;x<30;x++)
+                       PUT_CLID(0x55);
+       }
        /* Send 150ms of callerid marks */
        for (x=0;x<150;x++)
                PUT_CLID_MARKMS;
@@ -412,6 +444,8 @@ void ast_shrink_phone_number(char *n)
 int ast_isphonenumber(char *n)
 {
        int x;
+       if (!n)
+               return 0;
        for (x=0;n[x];x++)
                if (!strchr("0123456789", n[x]))
                        return 0;
@@ -422,6 +456,7 @@ int ast_callerid_parse(char *instr, char **name, char **location)
 {
        char *ns, *ne;
        char *ls, *le;
+       char tmp[256];
        /* Try for "name" <location> format or 
           name <location> format */
        if ((ls = strchr(instr, '<')) && (le = strchr(ls, '>'))) {
@@ -446,29 +481,46 @@ int ast_callerid_parse(char *instr, char **name, char **location)
                        return 0;
                }
        } else {
-               /* Assume it's just a location */
-               *name = NULL;
-               *location = instr;
+               strncpy(tmp, instr, sizeof(tmp));
+               ast_shrink_phone_number(tmp);
+               if (!ast_isphonenumber(tmp)) {
+                       /* Assume it's just a location */
+                       *name = NULL;
+                       *location = instr;
+               } else {
+                       /* Assume it's just a name */
+                       *name = instr;
+                       *location = NULL;
+               }
                return 0;
        }
        return -1;
 }
 
-int ast_callerid_generate(unsigned char *buf, char *callerid)
+static int __ast_callerid_generate(unsigned char *buf, char *callerid, int callwaiting)
 {
        char tmp[256];
        char *n, *l;
        if (!callerid)
-               return callerid_generate(buf, NULL, NULL, 0);
+               return callerid_generate(buf, NULL, NULL, 0, callwaiting);
        strncpy(tmp, callerid, sizeof(tmp));
        if (ast_callerid_parse(tmp, &n, &l)) {
                ast_log(LOG_WARNING, "Unable to parse '%s' into CallerID name & number\n", callerid);
-               return callerid_generate(buf, NULL, NULL, 0);
+               return callerid_generate(buf, NULL, NULL, 0, callwaiting);
        }
-       ast_shrink_phone_number(l);
-       if (!n && (!ast_isphonenumber(l)))
-               return callerid_generate(buf, NULL, NULL, 0);
-       if (!ast_isphonenumber(l)) 
-               return callerid_generate(buf, NULL, n, 0);
-       return callerid_generate(buf, l, n, 0);
+       if (l)
+               ast_shrink_phone_number(l);
+       if (!ast_isphonenumber(l))
+               return callerid_generate(buf, NULL, n, 0, callwaiting);
+       return callerid_generate(buf, l, n, 0, callwaiting);
+}
+
+int ast_callerid_generate(unsigned char *buf, char *callerid)
+{
+       return __ast_callerid_generate(buf, callerid, 0);
+}
+
+int ast_callerid_callwaiting_generate(unsigned char *buf, char *callerid)
+{
+       return __ast_callerid_generate(buf, callerid, 1);
 }
index 3a53a64..0f72001 100755 (executable)
--- a/channel.c
+++ b/channel.c
@@ -28,6 +28,7 @@
 #include <asterisk/translate.h>
 
 
+/* XXX Lock appropriately in more functions XXX */
 
 #ifdef DEBUG_MUTEX
 /* Convenient mutex debugging functions */
 
 static int __PTHREAD_MUTEX_LOCK(char *f, pthread_mutex_t *a) {
        ast_log(LOG_DEBUG, "Locking %p (%s)\n", a, f); 
-       return pthread_mutex_lock(a);
+       return ast_pthread_mutex_lock(a);
 }
 
 static int __PTHREAD_MUTEX_UNLOCK(char *f, pthread_mutex_t *a) {
        ast_log(LOG_DEBUG, "Unlocking %p (%s)\n", a, f); 
-       return pthread_mutex_unlock(a);
+       return ast_pthread_mutex_unlock(a);
 }
 #else
-#define PTHREAD_MUTEX_LOCK(a) pthread_mutex_lock(a)
-#define PTHREAD_MUTEX_UNLOCK(a) pthread_mutex_unlock(a)
+#define PTHREAD_MUTEX_LOCK(a) ast_pthread_mutex_lock(a)
+#define PTHREAD_MUTEX_UNLOCK(a) ast_pthread_mutex_unlock(a)
 #endif
 
 struct chanlist {
@@ -103,10 +104,35 @@ int ast_channel_register(char *type, char *description, int capabilities,
        return 0;
 }
 
+char *ast_state2str(int state)
+{
+       switch(state) {
+       case AST_STATE_DOWN:
+               return "Down";
+       case AST_STATE_RESERVED:
+               return "Rsrvd";
+       case AST_STATE_OFFHOOK:
+               return "OffHook";
+       case AST_STATE_DIALING:
+               return "Dialing";
+       case AST_STATE_RING:
+               return "Ring";
+       case AST_STATE_RINGING:
+               return "Ringing";
+       case AST_STATE_UP:
+               return "Up";
+       case AST_STATE_BUSY:
+               return "Busy";
+       default:
+               return "Unknown";
+       }
+}
+
 struct ast_channel *ast_channel_alloc(void)
 {
        struct ast_channel *tmp;
        struct ast_channel_pvt *pvt;
+       int x;
        PTHREAD_MUTEX_LOCK(&chlock);
        tmp = malloc(sizeof(struct ast_channel));
        memset(tmp, 0, sizeof(struct ast_channel));
@@ -116,7 +142,8 @@ struct ast_channel *ast_channel_alloc(void)
                        memset(pvt, 0, sizeof(struct ast_channel_pvt));
                        tmp->sched = sched_context_create();
                        if (tmp->sched) {
-                               tmp->fd = -1;
+                               for (x=0;x<AST_MAX_FDS;x++)
+                                       tmp->fds[x] = -1;
                                strncpy(tmp->name, "**Unknown**", sizeof(tmp->name));
                                tmp->pvt = pvt;
                                tmp->state = AST_STATE_DOWN;
@@ -206,16 +233,10 @@ void ast_channel_free(struct ast_channel *chan)
 int ast_softhangup(struct ast_channel *chan)
 {
        int res = 0;
-       if (chan->stream)
-               ast_stopstream(chan);
        if (option_debug)
                ast_log(LOG_DEBUG, "Soft-Hanging up channel '%s'\n", chan->name);
-       if (chan->pvt->hangup)
-               res = chan->pvt->hangup(chan);
-       if (chan->pvt->pvt)
-               ast_log(LOG_WARNING, "Channel '%s' may not have been hung up properly\n", chan->name);
-       if (chan->pbx) 
-               ast_log(LOG_WARNING, "PBX may not have been terminated properly on '%s'\n", chan->name);        
+       /* Inform channel driver that we need to be hung up, if it cares */
+       chan->softhangup = 1;           
        /* Interrupt any select call or such */
        if (chan->blocking)
                pthread_kill(chan->blocker, SIGURG);
@@ -225,6 +246,16 @@ int ast_softhangup(struct ast_channel *chan)
 int ast_hangup(struct ast_channel *chan)
 {
        int res = 0;
+       /* Don't actually hang up a channel that will masquerade as someone else, or
+          if someone is going to masquerade as us */
+       if (chan->masq)
+               return 0;
+       /* If this channel is one which will be masqueraded into something, 
+          mark it as a zombie already, so we know to free it later */
+       if (chan->masqr) {
+               chan->zombie=1;
+               return 0;
+       }
        if (chan->stream)
                ast_stopstream(chan);
        if (chan->sched)
@@ -235,10 +266,15 @@ int ast_hangup(struct ast_channel *chan)
                                        pthread_self(), chan->name, chan->blocker, chan->blockproc);
                CRASH;
        }
-       if (option_debug)
-               ast_log(LOG_DEBUG, "Hanging up channel '%s'\n", chan->name);
-       if (chan->pvt->hangup)
-               res = chan->pvt->hangup(chan);
+       if (!chan->zombie) {
+               if (option_debug)
+                       ast_log(LOG_DEBUG, "Hanging up channel '%s'\n", chan->name);
+               if (chan->pvt->hangup)
+                       res = chan->pvt->hangup(chan);
+       } else
+               if (option_debug)
+                       ast_log(LOG_DEBUG, "Hanging up zombie '%s'\n", chan->name);
+                       
        ast_channel_free(chan);
        return res;
 }
@@ -271,10 +307,18 @@ void ast_channel_unregister(char *type)
 
 int ast_answer(struct ast_channel *chan)
 {
-       /* Answer the line, if possible */
-       if (chan->state == AST_STATE_RING) {
+       /* Stop if we're a zombie or need a soft hangup */
+       if (chan->zombie || chan->softhangup) 
+               return -1;
+       switch(chan->state) {
+       case AST_STATE_RING:
+       case AST_STATE_RINGING:
                if (chan->pvt->answer)
                        return chan->pvt->answer(chan);
+               chan->state = AST_STATE_UP;
+               break;
+       case AST_STATE_UP:
+               break;
        }
        return 0;
 }
@@ -293,84 +337,125 @@ int ast_waitfor_n_fd(int *fds, int n, int *ms, int *exception)
        FD_ZERO(&rfds);
        FD_ZERO(&efds);
        for (x=0;x<n;x++) {
-               FD_SET(fds[x], &rfds);
-               FD_SET(fds[x], &efds);
-               if (fds[x] > max)
-                       max = fds[x];
+               if (fds[x] > -1) {
+                       FD_SET(fds[x], &rfds);
+                       FD_SET(fds[x], &efds);
+                       if (fds[x] > max)
+                               max = fds[x];
+               }
        }
        if (*ms >= 0) 
                res = select(max + 1, &rfds, NULL, &efds, &tv);
        else
                res = select(max + 1, &rfds, NULL, &efds, NULL);
+
+       if (res < 0) {
+               /* Simulate a timeout if we were interrupted */
+               if (errno != EINTR)
+                       *ms = -1;
+               else
+                       *ms = 0;
+               return -1;
+       }
+
        for (x=0;x<n;x++) {
-               if ((FD_ISSET(fds[x], &rfds) || FD_ISSET(fds[x], &efds)) && (winner < 0)) {
+               if ((fds[x] > -1) && (FD_ISSET(fds[x], &rfds) || FD_ISSET(fds[x], &efds)) && (winner < 0)) {
                        if (exception)
                                *exception = FD_ISSET(fds[x], &efds);
                        winner = fds[x];
                }
        }
        *ms = tv.tv_sec * 1000 + tv.tv_usec / 1000;
-       if (res < 0)
-               *ms = -10;
        return winner;
 }
 
+static int ast_do_masquerade(struct ast_channel *original);
+
 struct ast_channel *ast_waitfor_n(struct ast_channel **c, int n, int *ms)
 {
        /* Wait for x amount of time on a file descriptor to have input.  */
        struct timeval tv;
        fd_set rfds, efds;
        int res;
-       int x, max=-1;
+       int x, y, max=-1;
        struct ast_channel *winner = NULL;
        
+       /* Perform any pending masquerades */
+       for (x=0;x<n;x++) {
+               if (c[x]->masq) {
+                       if (ast_do_masquerade(c[x])) {
+                               ast_log(LOG_WARNING, "Masquerade failed\n");
+                               *ms = -1;
+                               return NULL;
+                       }
+               }
+       }
+       
        tv.tv_sec = *ms / 1000;
        tv.tv_usec = (*ms % 1000) * 1000;
        FD_ZERO(&rfds);
        FD_ZERO(&efds);
        for (x=0;x<n;x++) {
-               FD_SET(c[x]->fd, &rfds);
-               FD_SET(c[x]->fd, &efds);
+               for (y=0;y<AST_MAX_FDS;y++) {
+                       if (c[x]->fds[y] > 0) {
+                               FD_SET(c[x]->fds[y], &rfds);
+                               FD_SET(c[x]->fds[y], &efds);
+                               if (c[x]->fds[y] > max)
+                                       max = c[x]->fds[y];
+                       }
+               }
                CHECK_BLOCKING(c[x]);
-               if (c[x]->fd > max)
-                       max = c[x]->fd;
        }
        if (*ms >= 0) 
                res = select(max + 1, &rfds, NULL, &efds, &tv);
        else
                res = select(max + 1, &rfds, NULL, &efds, NULL);
+
+       if (res < 0) {
+               for (x=0;x<n;x++) 
+                       c[x]->blocking = 0;
+               /* Simulate a timeout if we were interrupted */
+               if (errno != EINTR)
+                       *ms = -1;
+               else
+                       *ms = 0;
+               return NULL;
+       }
+
        for (x=0;x<n;x++) {
                c[x]->blocking = 0;
-               if ((FD_ISSET(c[x]->fd, &rfds) || FD_ISSET(c[x]->fd, &efds)) && !winner) {
-                       /* Set exception flag if appropriate */
-                       if (FD_ISSET(c[x]->fd, &efds))
-                               c[x]->exception = 1;
-                       winner = c[x];
+               for (y=0;y<AST_MAX_FDS;y++) {
+                       if (c[x]->fds[y] > -1) {
+                               if ((FD_ISSET(c[x]->fds[y], &rfds) || FD_ISSET(c[x]->fds[y], &efds)) && !winner) {
+                                       /* Set exception flag if appropriate */
+                                       if (FD_ISSET(c[x]->fds[y], &efds))
+                                               c[x]->exception = 1;
+                                       c[x]->fdno = y;
+                                       winner = c[x];
+                               }
+                       }
                }
        }
        *ms = tv.tv_sec * 1000 + tv.tv_usec / 1000;
-       if (res < 0)
-               *ms = -10;
        return winner;
 }
 
 int ast_waitfor(struct ast_channel *c, int ms)
 {
-       if (ast_waitfor_n(&c, 1, &ms)) {
-               if (ms < 0)
-                       return -ms;
-               return ms;
-       }
-       /* Error if ms < 0 */
-       if (ms < 0) 
+       struct ast_channel *chan;
+       chan = ast_waitfor_n(&c, 1, &ms);
+       if (ms < 0)
                return -1;
-       return 0;
+       return ms;
 }
 
 char ast_waitfordigit(struct ast_channel *c, int ms)
 {
        struct ast_frame *f;
        char result = 0;
+       /* Stop if we're a zombie or need a soft hangup */
+       if (c->zombie || c->softhangup) 
+               return -1;
        /* Wait for a digit, no more than ms milliseconds total. */
        while(ms && !result) {
                ms = ast_waitfor(c, ms);
@@ -397,6 +482,24 @@ struct ast_frame *ast_read(struct ast_channel *chan)
        {
                AST_FRAME_NULL,
        };
+       
+       pthread_mutex_lock(&chan->lock);
+       if (chan->masq) {
+               if (ast_do_masquerade(chan)) {
+                       ast_log(LOG_WARNING, "Failed to perform masquerade\n");
+                       f = NULL;
+               } else
+                       f =  &null_frame;
+               pthread_mutex_unlock(&chan->lock);
+               return f;
+       }
+
+       /* Stop if we're a zombie or need a soft hangup */
+       if (chan->zombie || chan->softhangup) {
+               pthread_mutex_unlock(&chan->lock);
+               return NULL;
+       }
+               
        chan->blocker = pthread_self();
        if (chan->exception) {
                if (chan->pvt->exception) 
@@ -417,12 +520,35 @@ struct ast_frame *ast_read(struct ast_channel *chan)
                                f = &null_frame;
                }
        }
+       /* Make sure we always return NULL in the future */
+       if (!f)
+               chan->softhangup = 1;
+       pthread_mutex_unlock(&chan->lock);
+
        return f;
 }
 
+int ast_indicate(struct ast_channel *chan, int condition)
+{
+       int res = -1;
+       /* Stop if we're a zombie or need a soft hangup */
+       if (chan->zombie || chan->softhangup) 
+               return -1;
+       if (chan->pvt->indicate) {
+               res = chan->pvt->indicate(chan, condition);
+               if (res)
+                       ast_log(LOG_WARNING, "Driver for channel '%s' failed to indicate condition %d\n", chan->name, condition);
+       } else
+               ast_log(LOG_WARNING, "Driver for channel '%s' does not support indication\n", chan->name);
+       return res;
+}
+
 int ast_sendtext(struct ast_channel *chan, char *text)
 {
        int res = 0;
+       /* Stop if we're a zombie or need a soft hangup */
+       if (chan->zombie || chan->softhangup) 
+               return -1;
        CHECK_BLOCKING(chan);
        if (chan->pvt->send_text)
                res = chan->pvt->send_text(chan, text);
@@ -434,6 +560,18 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
 {
        int res = -1;
        struct ast_frame *f;
+       /* Stop if we're a zombie or need a soft hangup */
+       if (chan->zombie || chan->softhangup) 
+               return -1;
+       /* Handle any pending masquerades */
+       if (chan->masq) {
+               if (ast_do_masquerade(chan)) {
+                       ast_log(LOG_WARNING, "Failed to perform masquerade\n");
+                       return -1;
+               }
+       }
+       if (chan->masqr)
+               return 0;
        CHECK_BLOCKING(chan);
        switch(fr->frametype) {
        case AST_FRAME_CONTROL:
@@ -453,6 +591,8 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
                                f = fr;
                        if (f)  
                                res = chan->pvt->write(chan, f);
+                       else
+                               res = 0;
                }
        }
        chan->blocking = 0;
@@ -483,7 +623,8 @@ int ast_set_write_format(struct ast_channel *chan, int fmts)
                ast_translator_free_path(chan->pvt->writetrans);
        /* Build a translation path from the user write format to the raw writing format */
        chan->pvt->writetrans = ast_translator_build_path(chan->pvt->rawwriteformat, chan->writeformat);
-       ast_log(LOG_DEBUG, "Set channel %s to format %d\n", chan->name, chan->writeformat);
+       if (option_debug)
+               ast_log(LOG_DEBUG, "Set channel %s to format %d\n", chan->name, chan->writeformat);
        return 0;
 }
 
@@ -555,8 +696,12 @@ int ast_call(struct ast_channel *chan, char *addr, int timeout)
           If the remote end does not answer within the timeout, then do NOT hang up, but 
           return anyway.  */
        int res = -1;
-       if (chan->pvt->call)
-               res = chan->pvt->call(chan, addr, timeout);
+       /* Stop if we're a zombie or need a soft hangup */
+       pthread_mutex_lock(&chan->lock);
+       if (!chan->zombie && !chan->softhangup) 
+               if (chan->pvt->call)
+                       res = chan->pvt->call(chan, addr, timeout);
+       pthread_mutex_unlock(&chan->lock);
        return res;
 }
 
@@ -565,6 +710,9 @@ int ast_readstring(struct ast_channel *c, char *s, int len, int timeout, int fti
        int pos=0;
        int to = ftimeout;
        char d;
+       /* Stop if we're a zombie or need a soft hangup */
+       if (c->zombie || c->softhangup) 
+               return -1;
        if (!len)
                return -1;
        do {
@@ -638,7 +786,134 @@ int ast_channel_make_compatible(struct ast_channel *chan, struct ast_channel *pe
        return 0;
 }
 
+int ast_channel_masquerade(struct ast_channel *original, struct ast_channel *clone)
+{
+       ast_log(LOG_DEBUG, "Planning to masquerade %s into the structure of %s\n",
+               clone->name, original->name);
+       if (original->masq) {
+               ast_log(LOG_WARNING, "%s is already going to masquerade as %s\n", 
+                       original->masq->name, original->name);
+               return -1;
+       }
+       if (clone->masqr) {
+               ast_log(LOG_WARNING, "%s is already going to masquerade as %s\n", 
+                       clone->name, clone->masqr->name);
+               return -1;
+       }
+       original->masq = clone;
+       clone->masqr = original;
+       return 0;
+}
+
+static int ast_do_masquerade(struct ast_channel *original)
+{
+       int x;
+       int res=0;
+       char *tmp;
+       struct ast_channel_pvt *p;
+       struct ast_channel *clone = original->masq;
+       ast_log(LOG_DEBUG, "Actually Masquerading %s(%d) into the structure of %s(%d)\n",
+               clone->name, clone->state, original->name, original->state);
+       /* XXX This is a seriously wacked out operation.  We're essentially putting the guts of
+          the clone channel into the original channel.  Start by killing off the original
+          channel's backend.   I'm not sure we're going to keep this function, because 
+          while the features are nice, the cost is very high in terms of pure nastiness. XXX */
+
+       /* We need the clone's lock, too */
+       pthread_mutex_lock(&clone->lock);
+
+       /* Unlink the masquerade */
+       original->masq = NULL;
+       clone->masqr = NULL;
+               
+       /* Copy the name from the clone channel */
+       strncpy(original->name, clone->name, sizeof(original->name));
+
+       /* Mangle the name of the clone channel */
+       strncat(clone->name, "<MASQ>", sizeof(clone->name));
+
+       /* Swap the guts */     
+       p = original->pvt;
+       original->pvt = clone->pvt;
+       clone->pvt = p;
+
+       /* Start by disconnecting the original's physical side */
+       if (clone->pvt->hangup)
+               res = clone->pvt->hangup(clone);
+       if (res) {
+               ast_log(LOG_WARNING, "Hangup failed!  Strange things may happen!\n");
+               pthread_mutex_unlock(&clone->lock);
+               return -1;
+       }
+       
+       /* Mangle the name of the clone channel */
+       snprintf(clone->name, sizeof(clone->name), "%s<ZOMBIE>", original->name);
+
+       /* Keep the same language.  */
+       /* Update the type. */
+       original->type = clone->type;
+       /* Copy the FD's */
+       for (x=0;x<AST_MAX_FDS;x++)
+               original->fds[x] = clone->fds[x];
+       /* Bridge remains the same */
+       /* CDR fields remain the same */
+       /* XXX What about blocking, softhangup, blocker, and lock and blockproc? XXX */
+       /* Application and data remain the same */
+       /* Clone exception  becomes real one, as with fdno */
+       original->exception = clone->exception;
+       original->fdno = clone->fdno;
+       /* Schedule context remains the same */
+       /* Stream stuff stays the same */
+       /* Keep the original state.  The fixup code will need to work with it most likely */
+
+       /* dnid and callerid change to become the new, HOWEVER, we also link the original's
+          fields back into the defunct 'clone' so that they will be freed when
+          ast_frfree is eventually called */
+       tmp = original->dnid;
+       original->dnid = clone->dnid;
+       clone->dnid = tmp;
+       
+       tmp = original->callerid;
+       original->callerid = clone->callerid;
+       clone->callerid = tmp;
+       
+       /* Context, extension, priority, app data, jump table,  remain the same */
+       /* pvt switches.  pbx stays the same, as does next */
+       
+       /* Now, at this point, the "clone" channel is totally F'd up.  We mark it as
+          a zombie so nothing tries to touch it.  If it's already been marked as a
+          zombie, then free it now (since it already is considered invalid). */
+       if (clone->zombie) {
+               pthread_mutex_unlock(&clone->lock);
+               ast_channel_free(clone);
+       } else {
+               clone->zombie=1;
+               pthread_mutex_unlock(&clone->lock);
+       }
+       /* Set the write format */
+       ast_set_write_format(original, original->writeformat);
+
+       /* Set the read format */
+       ast_set_read_format(original, original->readformat);
 
+       /* Okay.  Last thing is to let the channel driver know about all this mess, so he
+          can fix up everything as best as possible */
+       if (original->pvt->fixup) {
+               res = original->pvt->fixup(clone, original);
+               if (res) {
+                       ast_log(LOG_WARNING, "Driver for '%s' could not fixup channel %s\n",
+                               original->type, original->name);
+                       return -1;
+               }
+       } else
+               ast_log(LOG_WARNING, "Driver '%s' does not have a fixup routine (for %s)!  Bad things may happen.\n",
+                       original->type, original->name);
+       
+       /* Signal any blocker */
+       if (original->blocking)
+               pthread_kill(original->blocker, SIGURG);
+       return 0;
+}
 
 int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
 {
@@ -648,11 +923,33 @@ int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags
        int to = -1;
        struct ast_frame *f;
        struct ast_channel *who;
+       int res;
+       /* Stop if we're a zombie or need a soft hangup */
+       if (c0->zombie || c0->softhangup || c1->zombie || c1->softhangup) 
+               return -1;
+       if (c0->bridge) {
+               ast_log(LOG_WARNING, "%s is already in a bridge with %s\n", 
+                       c0->name, c0->bridge->name);
+               return -1;
+       }
+       if (c1->bridge) {
+               ast_log(LOG_WARNING, "%s is already in a bridge with %s\n", 
+                       c1->name, c1->bridge->name);
+               return -1;
+       }
+       
+       /* Keep track of bridge */
+       c0->bridge = c1;
+       c1->bridge = c0;
+       
        if (c0->pvt->bridge && 
                (c0->pvt->bridge == c1->pvt->bridge)) {
                        /* Looks like they share a bridge code */
-               if (!c0->pvt->bridge(c0, c1, flags, fo, rc))
+               if (!c0->pvt->bridge(c0, c1, flags, fo, rc)) {
+                       c0->bridge = NULL;
+                       c1->bridge = NULL;
                        return 0;
+               }
                ast_log(LOG_WARNING, "Private bridge between %s and %s failed\n", c0->name, c1->name);
                /* If they return non-zero then continue on normally */
        }
@@ -664,36 +961,47 @@ int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags
        for (/* ever */;;) {
                who = ast_waitfor_n(cs, 2, &to);
                if (!who) {
-                       ast_log(LOG_WARNING, "Nobody there??\n");
+                       ast_log(LOG_WARNING, "Nobody there??\n"); 
                        continue;
                }
                f = ast_read(who);
                if (!f) {
                        *fo = NULL;
                        *rc = who;
-                       return 0;
+                       res = 0;
+                       break;
                }
                if ((f->frametype == AST_FRAME_CONTROL) && !(flags & AST_BRIDGE_IGNORE_SIGS)) {
                        *fo = f;
                        *rc = who;
-                       return 0;
+                       res =  0;
+                       break;
                }
                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;
-                                       /* Take out of conference mode */
-                                       return 0;
+                       if ((f->frametype == AST_FRAME_DTMF) && 
+                               (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))) {
+                               if ((who == c0)) {
+                                       if  ((flags & AST_BRIDGE_DTMF_CHANNEL_0)) {
+                                               *rc = c0;
+                                               *fo = f;
+                                               /* Take out of conference mode */
+                                               res = 0;
+                                               break;
+                                       } else 
+                                               goto tackygoto;
                                } else
-                               if ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1)) {
-                                       *rc = c1;
-                                       *fo = f;
-                                       return 0;
+                               if ((who == c1)) {
+                                       if (flags & AST_BRIDGE_DTMF_CHANNEL_1) {
+                                               *rc = c1;
+                                               *fo = f;
+                                               res =  0;
+                                               break;
+                                       } else
+                                               goto tackygoto;
                                }
                        } else {
 #if 0
@@ -702,6 +1010,7 @@ int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags
                                        ast_log(LOG_DEBUG, "Servicing channel %s twice in a row?\n", last->name);
                                last = who;
 #endif
+tackygoto:
                                if (who == c0) 
                                        ast_write(c1, f);
                                else 
@@ -715,5 +1024,27 @@ int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags
                cs[0] = cs[1];
                cs[1] = cs[2];
        }
+       c0->bridge = NULL;
+       c1->bridge = NULL;
+       return res;
+}
+
+int ast_channel_setoption(struct ast_channel *chan, int option, void *data, int datalen, int block)
+{
+       int res;
+       if (chan->pvt->setoption) {
+               res = chan->pvt->setoption(chan, option, data, datalen);
+               if (res < 0)
+                       return res;
+       } else {
+               errno = ENOSYS;
+               return -1;
+       }
+       if (block) {
+               /* XXX Implement blocking -- just wait for our option frame reply, discarding
+                  intermediate packets. XXX */
+               ast_log(LOG_ERROR, "XXX Blocking not implemented yet XXX\n");
+               return -1;
+       }
        return 0;
 }
index 3f7d5e7..3d0a302 100755 (executable)
@@ -25,6 +25,60 @@ extern "C" {
 
 #include <pthread.h>
 
+#ifdef DEBUG_THREADS
+
+#define TRIES 500
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+
+struct mutex_info {
+       pthread_mutex_t *mutex;
+       char *file;
+       int lineno;
+       char *func;
+       struct mutex_info *next;
+};
+
+static inline int __ast_pthread_mutex_lock(char *filename, int lineno, char *func, pthread_mutex_t *t) {
+       int res;
+       int tries = TRIES;
+       do {
+               res = pthread_mutex_trylock(t);
+               /* If we can't run, yield */
+               if (res) {
+                       sched_yield();
+                       usleep(1);
+               }
+       } while(res && tries--);
+       if (res) {
+               fprintf(stderr, "%s line %d (%s): Error obtaining mutex: %s\n", 
+                               filename, lineno, func, strerror(res));
+               res = pthread_mutex_lock(t);
+               fprintf(stderr, "%s line %d (%s): Got it eventually...\n",
+                               filename, lineno, func);
+       }
+       return res;
+}
+
+#define ast_pthread_mutex_lock(a) __ast_pthread_mutex_lock(__FILE__, __LINE__, __PRETTY_FUNCTION__, a)
+
+static inline int __ast_pthread_mutex_unlock(char *filename, int lineno, char *func, pthread_mutex_t *t) {
+       int res;
+       res = pthread_mutex_unlock(t);
+       if (res) 
+               fprintf(stderr, "%s line %d (%s): Error releasing mutex: %s\n", 
+                               filename, lineno, func, strerror(res));
+       return res;
+}
+#define ast_pthread_mutex_unlock(a) __ast_pthread_mutex_unlock(__FILE__, __LINE__, __PRETTY_FUNCTION__, a)
+#else
+#define ast_pthread_mutex_lock pthread_mutex_lock
+#define ast_pthread_mutex_unlock pthread_mutex_unlock
+#endif
+
 #define AST_CHANNEL_NAME 80
 #define AST_CHANNEL_MAX_STACK 32
 
@@ -33,14 +87,24 @@ extern "C" {
 /* Max length an extension can be (unique) is this number */
 #define AST_MAX_EXTENSION 80
 
+#define AST_MAX_FDS 4
+
 struct ast_channel {
        char name[AST_CHANNEL_NAME];            /* ASCII Description of channel name */
        char language[MAX_LANGUAGE];            /* Language requested */
        char *type;                             /* Type of channel */
-       int fd;                                 /* File descriptor for channel -- all must have
-                                                  a file descriptor! */
+       int fds[AST_MAX_FDS];                   /* File descriptor for channel -- Drivers will poll
+                                                                  on these file descriptors, so at least one must be
+                                                                  non -1.  */
                                                   
+       struct ast_channel *bridge;                     /* Who are we bridged to, if we're bridged */
+       struct ast_channel *masq;                       /* Channel that will masquerade as us */
+       struct ast_channel *masqr;                      /* Who we are masquerading as */
+       int cdrflags;                                           /* Call Detail Record Flags */                                             
+
        int blocking;                                           /* Whether or not we're blocking */
+       int softhangup;                                         /* Whether or not we have been hung up */
+       int zombie;                                                     /* Non-zero if this is a zombie channel */      
        pthread_t blocker;                                      /* If anyone is blocking, this is them */
        pthread_mutex_t lock;                           /* Lock, can be used to lock a channel for some operations */
        char *blockproc;                                        /* Procedure causing blocking */
@@ -49,6 +113,7 @@ struct ast_channel {
        char *data;                                                     /* Data passed to current application */
        
        int exception;                                          /* Has an exception been detected */
+       int fdno;                                                       /* Which fd had an event detected on */
        struct sched_context *sched;            /* Schedule context */
 
        int streamid;                                   /* For streaming playback, the schedule ID */
@@ -79,6 +144,11 @@ struct ast_channel {
 };
 
 
+#define AST_CDR_TRANSFER       (1 << 0)
+#define AST_CDR_FORWARD                (1 << 1)
+#define AST_CDR_CALLWAIT       (1 << 2)
+#define AST_CDR_CONFERENCE     (1 << 3)
+
 /* Bits 0-15 of state are reserved for the state (up/down) of the line */
 
 #define AST_STATE_DOWN         0               /* Channel is down and available */
@@ -123,6 +193,9 @@ int ast_answer(struct ast_channel *chan);
    the number of seconds the connect took otherwise.  */
 int ast_call(struct ast_channel *chan, char *addr, int timeout);
 
+/* Indicate a condition such as AST_CONTROL_BUSY, AST_CONTROL_RINGING, or AST_CONTROL_CONGESTION on a channel */
+int ast_indicate(struct ast_channel *chan, int condition);
+
 /* Misc stuff */
 
 /* Wait for input on a channel for a given # of milliseconds (<0 for indefinite).  
@@ -180,6 +253,28 @@ int ast_channel_make_compatible(struct ast_channel *c0, struct ast_channel *c1);
    *rf (remember, it could be NULL) and which channel (0 or 1) in rc */
 int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
 
+/* This is a very strange and freaky function used primarily for transfer.  Suppose that
+   "original" and "clone" are two channels in random situations.  This function takes
+   the guts out of "clone" and puts them into the "original" channel, then alerts the
+   channel driver of the change, asking it to fixup any private information (like the
+   p->owner pointer) that is affected by the change.  The physical layer of the original
+   channel is hung up.  */
+int ast_channel_masquerade(struct ast_channel *original, struct ast_channel *clone);
+
+/* Give a name to a state */
+char *ast_state2str(int state);
+
+/* Options: Some low-level drivers may implement "options" allowing fine tuning of the
+   low level channel.  See frame.h for options.  Note that many channel drivers may support
+   none or a subset of those features, and you should not count on this if you want your
+   asterisk application to be portable.  They're mainly useful for tweaking performance */
+
+/* Set an option on a channel (see frame.h), optionally blocking awaiting the reply */
+int ast_channel_setoption(struct ast_channel *channel, int option, void *data, int datalen, int block);
+
+/* Query the value of an option, optionally blocking until a reply is received */
+struct ast_frame *ast_channel_queryoption(struct ast_channel *channel, int option, void *data, int *datalen, int block);
+
 #ifdef DO_CRASH
 #define CRASH do { *((int *)0) = 0; } while(0)
 #else
index 7fc464e..a8a2e65 100755 (executable)
@@ -23,7 +23,7 @@ extern "C" {
 
 struct ast_channel_pvt {
        /* Private data used by channel backend */
-       void *pvt;      
+       void *pvt;
        /* Write translation path */
        struct ast_trans_pvt *writetrans;
        /* Read translation path */
@@ -51,6 +51,14 @@ struct ast_channel_pvt {
        struct ast_frame * (*exception)(struct ast_channel *chan);
        /* Bridge two channels of the same type together */
        int (*bridge)(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
+       /* Indicate a particular condition (e.g. AST_CONTROL_BUSY or AST_CONTROL_RINGING or AST_CONTROL_CONGESTION */
+       int (*indicate)(struct ast_channel *c, int condition);
+       /* Fix up a channel:  If a channel is consumed, this is called.  Basically update any ->owner links */
+       int (*fixup)(struct ast_channel *oldchan, struct ast_channel *newchan);
+       /* Set a given option */
+       int (*setoption)(struct ast_channel *chan, int option, void *data, int datalen);
+       /* Query a given option */
+       int (*queryoption)(struct ast_channel *chan, int option, void *data, int *datalen);
 };
 
 /* Create a channel structure */