Add preliminary chan_local, fix chan_sip to delete unknown calls
authorMark Spencer <markster@digium.com>
Sun, 6 Apr 2003 02:41:42 +0000 (02:41 +0000)
committerMark Spencer <markster@digium.com>
Sun, 6 Apr 2003 02:41:42 +0000 (02:41 +0000)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@750 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/Makefile
channels/chan_local.c [new file with mode: 0755]
channels/chan_sip.c

index a83093a..b0e9164 100755 (executable)
@@ -14,7 +14,8 @@
 CHANNEL_LIBS=chan_modem.so chan_iax.so chan_sip.so \
             chan_modem_aopen.so chan_oss.so \
              chan_modem_bestdata.so chan_modem_i4l.so \
 CHANNEL_LIBS=chan_modem.so chan_iax.so chan_sip.so \
             chan_modem_aopen.so chan_oss.so \
              chan_modem_bestdata.so chan_modem_i4l.so \
-             chan_agent.so chan_mgcp.so chan_iax2.so
+             chan_agent.so chan_mgcp.so chan_iax2.so \
+            chan_local.so
 
 #
 # If you really want VoFR you can have it :-P
 
 #
 # If you really want VoFR you can have it :-P
diff --git a/channels/chan_local.c b/channels/chan_local.c
new file mode 100755 (executable)
index 0000000..ddad32a
--- /dev/null
@@ -0,0 +1,409 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Local Proxy Channel
+ * 
+ * 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/lock.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/lock.h>
+#include <asterisk/sched.h>
+#include <asterisk/io.h>
+#include <asterisk/rtp.h>
+#include <asterisk/acl.h>
+#include <asterisk/callerid.h>
+#include <asterisk/file.h>
+#include <asterisk/cli.h>
+#include <asterisk/app.h>
+#include <asterisk/musiconhold.h>
+#include <asterisk/manager.h>
+#include <sys/socket.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <sys/signal.h>
+
+static char *desc = "Local Proxy Channel";
+static char *type = "Local";
+static char *tdesc = "Local Proxy Channel Driver";
+
+static int capability = -1;
+
+static int usecnt =0;
+static pthread_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
+
+#define IS_OUTBOUND(a,b) (a == b->chan ? 1 : 0)
+
+/* Protect the interface list (of sip_pvt's) */
+static pthread_mutex_t locallock = AST_MUTEX_INITIALIZER;
+
+static struct local_pvt {
+       pthread_mutex_t lock;                           /* Channel private lock */
+       char context[AST_MAX_EXTENSION];        /* Context to call */
+       char exten[AST_MAX_EXTENSION];          /* Extension to call */
+       int reqformat;                                          /* Requested format */
+       struct ast_channel *owner;                      /* Master Channel */
+       struct ast_channel *chan;                       /* Outbound channel */
+       struct local_pvt *next;                         /* Next entity */
+} *locals = NULL;
+
+static int local_queue_frame(struct local_pvt *p, int isoutbound, struct ast_frame *f)
+{
+       struct ast_channel *other;
+       if (isoutbound)
+               other = p->owner;
+       else
+               other = p->chan;
+       if (!other)
+               return 0;
+retrylock:             
+       if (pthread_mutex_trylock(&other->lock)) {
+               /* Failed to lock.  Release main lock and try again */
+               ast_pthread_mutex_unlock(&p->lock);
+               /* Wait just a bit */
+               usleep(1);
+               ast_pthread_mutex_lock(&p->lock);
+               goto retrylock;
+       }
+       ast_queue_frame(other, f, 0);
+       ast_pthread_mutex_unlock(&other->lock);
+       return 0;
+}
+
+static int local_answer(struct ast_channel *ast)
+{
+       struct local_pvt *p = ast->pvt->pvt;
+       int isoutbound = IS_OUTBOUND(ast, p);
+       int res = -1;
+       ast_pthread_mutex_lock(&p->lock);
+       if (isoutbound) {
+               /* Pass along answer since somebody answered us */
+               struct ast_frame answer = { AST_FRAME_CONTROL, AST_CONTROL_ANSWER };
+               local_queue_frame(p, isoutbound, &answer);
+       } else
+               ast_log(LOG_WARNING, "Huh?  Local is being asked to answer?\n");
+       ast_pthread_mutex_unlock(&p->lock);
+       return res;
+}
+
+static struct ast_frame  *local_read(struct ast_channel *ast)
+{
+       static struct ast_frame null = { AST_FRAME_NULL, };
+       return &null;
+}
+
+static int local_write(struct ast_channel *ast, struct ast_frame *f)
+{
+       struct local_pvt *p = ast->pvt->pvt;
+       int res = -1;
+       ast_pthread_mutex_lock(&p->lock);
+       int isoutbound = IS_OUTBOUND(ast, p);
+
+       /* Just queue for delivery to the other side */
+       ast_pthread_mutex_lock(&p->lock);
+       res = local_queue_frame(p, isoutbound, f);
+       ast_pthread_mutex_unlock(&p->lock);
+       return res;
+}
+
+static int local_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
+{
+       struct local_pvt *p = newchan->pvt->pvt;
+       ast_pthread_mutex_lock(&p->lock);
+       if ((p->owner != oldchan) && (p->chan != oldchan)) {
+               ast_log(LOG_WARNING, "old channel wasn't %p but was %p/%p\n", oldchan, p->owner, p->chan);
+               ast_pthread_mutex_unlock(&p->lock);
+               return -1;
+       }
+       if (p->owner == oldchan)
+               p->owner = newchan;
+       else
+               p->chan = newchan;      
+       ast_pthread_mutex_unlock(&p->lock);
+       return 0;
+}
+
+static int local_indicate(struct ast_channel *ast, int condition)
+{
+       struct local_pvt *p = ast->pvt->pvt;
+       int res = -1;
+       struct ast_frame f = { AST_FRAME_CONTROL, };
+       int isoutbound = IS_OUTBOUND(ast, p);
+       /* Queue up a frame representing the indication as a control frame */
+       ast_pthread_mutex_lock(&p->lock);
+       f.subclass = condition;
+       res = local_queue_frame(p, isoutbound, &f);
+       ast_pthread_mutex_unlock(&p->lock);
+       return res;
+}
+
+static int local_digit(struct ast_channel *ast, char digit)
+{
+       struct local_pvt *p = ast->pvt->pvt;
+       int res = -1;
+       struct ast_frame f = { AST_FRAME_DTMF, };
+       int isoutbound = IS_OUTBOUND(ast, p);
+       ast_pthread_mutex_lock(&p->lock);
+       f.subclass = digit;
+       res = local_queue_frame(p, isoutbound, &f);
+       ast_pthread_mutex_unlock(&p->lock);
+       return res;
+}
+
+static int local_call(struct ast_channel *ast, char *dest, int timeout)
+{
+       struct local_pvt *p = ast->pvt->pvt;
+       /* Start switch on sub channel */
+       return ast_pbx_start(p->chan);
+}
+
+static void local_destroy(struct local_pvt *p)
+{
+       struct local_pvt *cur, *prev = NULL;
+       ast_pthread_mutex_lock(&locallock);
+       cur = locals;
+       while(cur) {
+               if (cur == p) {
+                       if (prev)
+                               prev->next = cur->next;
+                       else
+                               locals = cur->next;
+                       free(cur);
+                       break;
+               }
+               prev = cur;
+               cur = cur->next;
+       }
+       ast_pthread_mutex_unlock(&locallock);
+       if (!cur)
+               ast_log(LOG_WARNING, "Unable ot find local '%s@%s' in local list\n", p->exten, p->context);
+}
+
+static int local_hangup(struct ast_channel *ast)
+{
+       struct local_pvt *p = ast->pvt->pvt;
+       int isoutbound = IS_OUTBOUND(ast, p);
+       struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_HANGUP };
+       ast_pthread_mutex_lock(&p->lock);
+       if (isoutbound)
+               p->chan = NULL;
+       else
+               p->owner = NULL;
+       ast->pvt->pvt = NULL;
+       if (!p->owner && !p->chan) {
+               /* Okay, done with the private part now, too. */
+               ast_pthread_mutex_unlock(&p->lock);
+               free(p);
+               return 0;
+       }
+       local_queue_frame(p, isoutbound, &f);
+       ast_pthread_mutex_unlock(&p->lock);
+       return 0;
+}
+
+static struct local_pvt *local_alloc(char *data, int format)
+{
+       struct local_pvt *tmp;
+       char *c;
+       tmp = malloc(sizeof(struct local_pvt));
+       if (tmp) {
+               memset(tmp, 0, sizeof(struct local_pvt));
+               ast_pthread_mutex_init(&tmp->lock);
+               strncpy(tmp->exten, data, sizeof(tmp->exten) - 1);
+               c = strchr(tmp->exten, '@');
+               if (c) {
+                       *c = '\0';
+                       c++;
+                       strncpy(tmp->context, data, sizeof(tmp->context) - 1);
+               }
+               tmp->reqformat = format;
+               /* Add to list */
+               ast_pthread_mutex_lock(&locallock);
+               tmp->next = locals;
+               locals = tmp;
+               ast_pthread_mutex_unlock(&locallock);
+               
+       }
+       return tmp;
+}
+
+static struct ast_channel *local_new(struct local_pvt *p, int state)
+{
+       struct ast_channel *tmp, *tmp2;
+       tmp = ast_channel_alloc(1);
+       tmp2 = ast_channel_alloc(1);
+       if (!tmp || !tmp2) {
+               if (tmp)
+                       ast_channel_free(tmp);
+               if (tmp2)
+                       ast_channel_free(tmp2);
+               tmp = NULL;
+       }
+       if (tmp) {
+               tmp->nativeformats = p->reqformat;
+               tmp->nativeformats = p->reqformat;
+               snprintf(tmp->name, sizeof(tmp->name), "Local/%s@%s-1", p->exten, p->context);
+               snprintf(tmp2->name, sizeof(tmp2->name), "Local/%s@%s-2", p->exten, p->context);
+               tmp->type = type;
+               tmp2->type = type;
+               ast_setstate(tmp, state);
+               ast_setstate(tmp2, AST_STATE_RING);
+               tmp->writeformat = p->reqformat;;
+               tmp2->writeformat = p->reqformat;
+               tmp->pvt->rawwriteformat = p->reqformat;
+               tmp2->pvt->rawwriteformat = p->reqformat;
+               tmp->readformat = p->reqformat;
+               tmp2->readformat = p->reqformat;
+               tmp->pvt->rawreadformat = p->reqformat;
+               tmp2->pvt->rawreadformat = p->reqformat;
+               tmp->pvt->pvt = p;
+               tmp2->pvt->pvt = p;
+               tmp->pvt->send_digit = local_digit;
+               tmp2->pvt->send_digit = local_digit;
+               tmp->pvt->call = local_call;
+               tmp2->pvt->call = local_call;
+               tmp->pvt->hangup = local_hangup;
+               tmp2->pvt->hangup = local_hangup;
+               tmp->pvt->answer = local_answer;
+               tmp2->pvt->answer = local_answer;
+               tmp->pvt->read = local_read;
+               tmp2->pvt->read = local_read;
+               tmp->pvt->write = local_write;
+               tmp2->pvt->write = local_write;
+               tmp->pvt->exception = local_read;
+               tmp2->pvt->exception = local_read;
+               tmp->pvt->indicate = local_indicate;
+               tmp2->pvt->indicate = local_indicate;
+               tmp->pvt->fixup = local_fixup;
+               tmp2->pvt->fixup = local_fixup;
+               p->owner = tmp;
+               p->chan = tmp2;
+               ast_pthread_mutex_lock(&usecnt_lock);
+               usecnt++;
+               ast_pthread_mutex_unlock(&usecnt_lock);
+               ast_update_use_count();
+               strncpy(tmp->context, p->context, sizeof(tmp->context)-1);
+               strncpy(tmp2->context, p->context, sizeof(tmp2->context)-1);
+               strncpy(tmp2->exten, p->exten, sizeof(tmp->exten)-1);
+               tmp->priority = 1;
+               tmp2->priority = 1;
+       } else
+               ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
+       return tmp;
+}
+
+
+static struct ast_channel *local_request(char *type, int format, void *data)
+{
+       struct local_pvt *p;
+       struct ast_channel *chan = NULL;
+       p = local_alloc(data, format);
+       chan = local_new(p, AST_STATE_DOWN);
+       return chan;
+}
+
+static int locals_show(int fd, int argc, char **argv)
+{
+       struct local_pvt *p;
+
+       if (argc != 2)
+               return RESULT_SHOWUSAGE;
+       ast_pthread_mutex_lock(&locallock);
+       p = locals;
+       while(p) {
+               ast_pthread_mutex_lock(&p->lock);
+               ast_cli(fd, "%s -- %s@%s\n", p->owner ? p->owner->name : "<unowned>", p->exten, p->context);
+               ast_pthread_mutex_unlock(&p->lock);
+               p = p->next;
+       }
+       if (!locals)
+               ast_cli(fd, "No local channels in use\n");
+       ast_pthread_mutex_unlock(&locallock);
+       return RESULT_SUCCESS;
+}
+
+static char show_locals_usage[] = 
+"Usage: show locals\n"
+"       Provides summary information on locals.\n";
+
+static struct ast_cli_entry cli_show_locals = {
+       { "show", "locals", NULL }, locals_show, 
+       "Show status of local channels", show_locals_usage, NULL };
+
+int load_module()
+{
+       /* Make sure we can register our sip channel type */
+       if (ast_channel_register(type, tdesc, capability, local_request)) {
+               ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
+               return -1;
+       }
+       ast_cli_register(&cli_show_locals);
+       return 0;
+}
+
+int reload()
+{
+       return 0;
+}
+
+int unload_module()
+{
+       struct local_pvt *p;
+       /* First, take us out of the channel loop */
+       ast_cli_unregister(&cli_show_locals);
+       ast_channel_unregister(type);
+       if (!ast_pthread_mutex_lock(&locallock)) {
+               /* Hangup all interfaces if they have an owner */
+               p = locals;
+               while(p) {
+                       if (p->owner)
+                               ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
+                       p = p->next;
+               }
+               locals = NULL;
+               ast_pthread_mutex_unlock(&locallock);
+       } else {
+               ast_log(LOG_WARNING, "Unable to lock the monitor\n");
+               return -1;
+       }               
+       return 0;
+}
+
+int usecount()
+{
+       int res;
+       ast_pthread_mutex_lock(&usecnt_lock);
+       res = usecnt;
+       ast_pthread_mutex_unlock(&usecnt_lock);
+       return res;
+}
+
+char *key()
+{
+       return ASTERISK_GPL_KEY;
+}
+
+char *description()
+{
+       return desc;
+}
+
index 39f6dac..0b38ae4 100755 (executable)
@@ -4024,6 +4024,9 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
                transmit_response_with_allow(p, "405 Method Not Allowed", req);
                ast_log(LOG_NOTICE, "Unknown SIP command '%s' from '%s'\n", 
                        cmd, inet_ntoa(p->sa.sin_addr));
                transmit_response_with_allow(p, "405 Method Not Allowed", req);
                ast_log(LOG_NOTICE, "Unknown SIP command '%s' from '%s'\n", 
                        cmd, inet_ntoa(p->sa.sin_addr));
+               /* If this is some new method, and we don't have a call, destory it now */
+               if (!p->initreq.headers)
+                       p->needdestroy = 1;
        }
        return 0;
 }
        }
        return 0;
 }