Version 0.1.8 from FTP
[asterisk/asterisk.git] / channel.c
index 0a18b28..3a53a64 100755 (executable)
--- a/channel.c
+++ b/channel.c
@@ -18,6 +18,7 @@
 #include <sys/time.h>
 #include <signal.h>
 #include <errno.h>
+#include <unistd.h>
 #include <asterisk/sched.h>
 #include <asterisk/options.h>
 #include <asterisk/channel.h>
 #include <asterisk/file.h>
 #include <asterisk/translate.h>
 
+
+
+#ifdef DEBUG_MUTEX
+/* Convenient mutex debugging functions */
+#define PTHREAD_MUTEX_LOCK(a) __PTHREAD_MUTEX_LOCK(__FUNCTION__, a)
+#define PTHREAD_MUTEX_UNLOCK(a) __PTHREAD_MUTEX_UNLOCK(__FUNCTION__, a)
+
+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);
+}
+
+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);
+}
+#else
+#define PTHREAD_MUTEX_LOCK(a) pthread_mutex_lock(a)
+#define PTHREAD_MUTEX_UNLOCK(a) pthread_mutex_unlock(a)
+#endif
+
 struct chanlist {
        char type[80];
        char description[80];
@@ -33,7 +55,6 @@ struct chanlist {
        struct ast_channel * (*requester)(char *type, int format, void *data);
        struct chanlist *next;
 } *backends = NULL;
-
 struct ast_channel *channels = NULL;
 
 /* Protect the channel list (highly unlikely that two things would change
@@ -45,7 +66,7 @@ int ast_channel_register(char *type, char *description, int capabilities,
                struct ast_channel *(*requester)(char *type, int format, void *data))
 {
        struct chanlist *chan, *last=NULL;
-       if (pthread_mutex_lock(&chlock)) {
+       if (PTHREAD_MUTEX_LOCK(&chlock)) {
                ast_log(LOG_WARNING, "Unable to lock channel list\n");
                return -1;
        }
@@ -53,7 +74,7 @@ int ast_channel_register(char *type, char *description, int capabilities,
        while(chan) {
                if (!strcasecmp(type, chan->type)) {
                        ast_log(LOG_WARNING, "Already have a handler for type '%s'\n", type);
-                       pthread_mutex_unlock(&chlock);
+                       PTHREAD_MUTEX_UNLOCK(&chlock);
                        return -1;
                }
                last = chan;
@@ -62,7 +83,7 @@ int ast_channel_register(char *type, char *description, int capabilities,
        chan = malloc(sizeof(struct chanlist));
        if (!chan) {
                ast_log(LOG_WARNING, "Out of memory\n");
-               pthread_mutex_unlock(&chlock);
+               PTHREAD_MUTEX_UNLOCK(&chlock);
                return -1;
        }
        strncpy(chan->type, type, sizeof(chan->type));
@@ -78,7 +99,7 @@ int ast_channel_register(char *type, char *description, int capabilities,
                ast_log(LOG_DEBUG, "Registered handler for '%s' (%s)\n", chan->type, chan->description);
        else if (option_verbose > 1)
                ast_verbose( VERBOSE_PREFIX_2 "Registered channel type '%s' (%s)\n", chan->type, chan->description);
-       pthread_mutex_unlock(&chlock);
+       PTHREAD_MUTEX_UNLOCK(&chlock);
        return 0;
 }
 
@@ -86,7 +107,7 @@ struct ast_channel *ast_channel_alloc(void)
 {
        struct ast_channel *tmp;
        struct ast_channel_pvt *pvt;
-       pthread_mutex_lock(&chlock);
+       PTHREAD_MUTEX_LOCK(&chlock);
        tmp = malloc(sizeof(struct ast_channel));
        memset(tmp, 0, sizeof(struct ast_channel));
        if (tmp) {
@@ -105,6 +126,7 @@ struct ast_channel *ast_channel_alloc(void)
                                tmp->data = NULL;
                                pthread_mutex_init(&tmp->lock, NULL);
                                strncpy(tmp->context, "default", sizeof(tmp->context));
+                               strncpy(tmp->language, defaultlanguage, sizeof(tmp->language));
                                strncpy(tmp->exten, "s", sizeof(tmp->exten));
                                tmp->priority=1;
                                tmp->next = channels;
@@ -121,17 +143,17 @@ struct ast_channel *ast_channel_alloc(void)
                }
        } else 
                ast_log(LOG_WARNING, "Out of memory\n");
-       pthread_mutex_unlock(&chlock);
+       PTHREAD_MUTEX_UNLOCK(&chlock);
        return tmp;
 }
 
 struct ast_channel *ast_channel_walk(struct ast_channel *prev)
 {
        struct ast_channel *l, *ret=NULL;
-       pthread_mutex_lock(&chlock);
+       PTHREAD_MUTEX_LOCK(&chlock);
        l = channels;
        if (!prev) {
-               pthread_mutex_unlock(&chlock);
+               PTHREAD_MUTEX_UNLOCK(&chlock);
                return l;
        }
        while(l) {
@@ -139,7 +161,7 @@ struct ast_channel *ast_channel_walk(struct ast_channel *prev)
                        ret = l->next;
                l = l->next;
        }
-       pthread_mutex_unlock(&chlock);
+       PTHREAD_MUTEX_UNLOCK(&chlock);
        return ret;
        
 }
@@ -147,7 +169,7 @@ struct ast_channel *ast_channel_walk(struct ast_channel *prev)
 void ast_channel_free(struct ast_channel *chan)
 {
        struct ast_channel *last=NULL, *cur;
-       pthread_mutex_lock(&chlock);
+       PTHREAD_MUTEX_LOCK(&chlock);
        cur = channels;
        while(cur) {
                if (cur == chan) {
@@ -164,8 +186,11 @@ void ast_channel_free(struct ast_channel *chan)
                ast_log(LOG_WARNING, "Unable to find channel in list\n");
        if (chan->pvt->pvt)
                ast_log(LOG_WARNING, "Channel '%s' may not have been hung up properly\n", chan->name);
-       if (chan->trans)
-               ast_log(LOG_WARNING, "Hard hangup called on '%s' while a translator is in place!  Expect a failure.\n", chan->name);
+       /* Free translatosr */
+       if (chan->pvt->readtrans)
+               ast_translator_free_path(chan->pvt->readtrans);
+       if (chan->pvt->writetrans)
+               ast_translator_free_path(chan->pvt->writetrans);
        if (chan->pbx) 
                ast_log(LOG_WARNING, "PBX may not have been terminated properly on '%s'\n", chan->name);
        if (chan->dnid)
@@ -173,8 +198,9 @@ void ast_channel_free(struct ast_channel *chan)
        if (chan->callerid)
                free(chan->callerid);   
        pthread_mutex_destroy(&chan->lock);
+       free(chan->pvt);
        free(chan);
-       pthread_mutex_unlock(&chlock);
+       PTHREAD_MUTEX_UNLOCK(&chlock);
 }
 
 int ast_softhangup(struct ast_channel *chan)
@@ -184,8 +210,6 @@ int ast_softhangup(struct ast_channel *chan)
                ast_stopstream(chan);
        if (option_debug)
                ast_log(LOG_DEBUG, "Soft-Hanging up channel '%s'\n", chan->name);
-       if (chan->trans)
-               ast_log(LOG_WARNING, "Soft hangup called on '%s' while a translator is in place!  Expect a failure.\n", chan->name);
        if (chan->pvt->hangup)
                res = chan->pvt->hangup(chan);
        if (chan->pvt->pvt)
@@ -205,8 +229,12 @@ int ast_hangup(struct ast_channel *chan)
                ast_stopstream(chan);
        if (chan->sched)
                sched_context_destroy(chan->sched);
-       if (chan->blocking)
-               ast_log(LOG_WARNING, "Hard hangup called, while fd is blocking!  Expect a failure\n");
+       if (chan->blocking) {
+               ast_log(LOG_WARNING, "Hard hangup called by thread %ld on %s, while fd "
+                                       "is blocked by thread %ld in procedure %s!  Expect a failure\n",
+                                       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)
@@ -220,7 +248,7 @@ void ast_channel_unregister(char *type)
        struct chanlist *chan, *last=NULL;
        if (option_debug)
                ast_log(LOG_DEBUG, "Unregistering channel type '%s'\n", type);
-       if (pthread_mutex_lock(&chlock)) {
+       if (PTHREAD_MUTEX_LOCK(&chlock)) {
                ast_log(LOG_WARNING, "Unable to lock channel list\n");
                return;
        }
@@ -232,13 +260,13 @@ void ast_channel_unregister(char *type)
                        else
                                backends = backends->next;
                        free(chan);
-                       pthread_mutex_unlock(&chlock);
+                       PTHREAD_MUTEX_UNLOCK(&chlock);
                        return;
                }
                last = chan;
                chan = chan->next;
        }
-       pthread_mutex_unlock(&chlock);
+       PTHREAD_MUTEX_UNLOCK(&chlock);
 }
 
 int ast_answer(struct ast_channel *chan)
@@ -251,7 +279,7 @@ int ast_answer(struct ast_channel *chan)
        return 0;
 }
 
-int ast_waitfor_n_fd(int *fds, int n, int *ms)
+int ast_waitfor_n_fd(int *fds, int n, int *ms, int *exception)
 {
        /* Wait for x amount of time on a file descriptor to have input.  */
        struct timeval tv;
@@ -275,8 +303,11 @@ int ast_waitfor_n_fd(int *fds, int n, int *ms)
        else
                res = select(max + 1, &rfds, NULL, &efds, NULL);
        for (x=0;x<n;x++) {
-               if ((FD_ISSET(fds[x], &rfds) || FD_ISSET(fds[x], &efds)) && (winner < 0))
+               if ((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)
@@ -310,8 +341,12 @@ struct ast_channel *ast_waitfor_n(struct ast_channel **c, int n, int *ms)
                res = select(max + 1, &rfds, NULL, &efds, 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)
+               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];
+               }
        }
        *ms = tv.tv_sec * 1000 + tv.tv_usec / 1000;
        if (res < 0)
@@ -358,17 +393,47 @@ char ast_waitfordigit(struct ast_channel *c, int ms)
 struct ast_frame *ast_read(struct ast_channel *chan)
 {
        struct ast_frame *f = NULL;
+       static struct ast_frame null_frame = 
+       {
+               AST_FRAME_NULL,
+       };
        chan->blocker = pthread_self();
+       if (chan->exception) {
+               if (chan->pvt->exception) 
+                       f = chan->pvt->exception(chan);
+               else
+                       ast_log(LOG_WARNING, "Exception flag set, but no exception handler\n");
+               /* Clear the exception flag */
+               chan->exception = 0;
+       } else
        if (chan->pvt->read)
                f = chan->pvt->read(chan);
        else
                ast_log(LOG_WARNING, "No read routine on channel %s\n", chan);
+       if (f && (f->frametype == AST_FRAME_VOICE)) {
+               if (chan->pvt->readtrans) {
+                       f = ast_translate(chan->pvt->readtrans, f, 1);
+                       if (!f)
+                               f = &null_frame;
+               }
+       }
        return f;
 }
 
+int ast_sendtext(struct ast_channel *chan, char *text)
+{
+       int res = 0;
+       CHECK_BLOCKING(chan);
+       if (chan->pvt->send_text)
+               res = chan->pvt->send_text(chan, text);
+       chan->blocking = 0;
+       return res;
+}
+
 int ast_write(struct ast_channel *chan, struct ast_frame *fr)
 {
        int res = -1;
+       struct ast_frame *f;
        CHECK_BLOCKING(chan);
        switch(fr->frametype) {
        case AST_FRAME_CONTROL:
@@ -381,36 +446,106 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
                        res = chan->pvt->send_digit(chan, fr->subclass);
                break;
        default:
-               if (chan->pvt->write)
-                       res = chan->pvt->write(chan, fr);
+               if (chan->pvt->write) {
+                       if (chan->pvt->writetrans) {
+                               f = ast_translate(chan->pvt->writetrans, fr, 1);
+                       } else
+                               f = fr;
+                       if (f)  
+                               res = chan->pvt->write(chan, f);
+               }
        }
        chan->blocking = 0;
        return res;
 }
 
+int ast_set_write_format(struct ast_channel *chan, int fmts)
+{
+       int fmt;
+       int native;
+       int res;
+       
+       native = chan->nativeformats;
+       fmt = fmts;
+       
+       res = ast_translator_best_choice(&native, &fmt);
+       if (res < 0) {
+               ast_log(LOG_NOTICE, "Unable to find a path from %d to %d\n", fmts, chan->nativeformats);
+               return -1;
+       }
+       
+       /* Now we have a good choice for both.  We'll write using our native format. */
+       chan->pvt->rawwriteformat = native;
+       /* User perspective is fmt */
+       chan->writeformat = fmt;
+       /* Free any write translation we have right now */
+       if (chan->pvt->writetrans)
+               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);
+       return 0;
+}
+
+int ast_set_read_format(struct ast_channel *chan, int fmts)
+{
+       int fmt;
+       int native;
+       int res;
+       
+       native = chan->nativeformats;
+       fmt = fmts;
+       /* Find a translation path from the native read format to one of the user's read formats */
+       res = ast_translator_best_choice(&fmt, &native);
+       if (res < 0) {
+               ast_log(LOG_NOTICE, "Unable to find a path from %d to %d\n", chan->nativeformats, fmts);
+               return -1;
+       }
+       
+       /* Now we have a good choice for both.  We'll write using our native format. */
+       chan->pvt->rawreadformat = native;
+       /* User perspective is fmt */
+       chan->readformat = fmt;
+       /* Free any read translation we have right now */
+       if (chan->pvt->readtrans)
+               ast_translator_free_path(chan->pvt->readtrans);
+       /* Build a translation path from the raw read format to the user reading format */
+       chan->pvt->readtrans = ast_translator_build_path(chan->readformat, chan->pvt->rawreadformat);
+       return 0;
+}
+
 struct ast_channel *ast_request(char *type, int format, void *data)
 {
        struct chanlist *chan;
        struct ast_channel *c = NULL;
-       if (pthread_mutex_lock(&chlock)) {
+       int capabilities;
+       int fmt;
+       int res;
+       if (PTHREAD_MUTEX_LOCK(&chlock)) {
                ast_log(LOG_WARNING, "Unable to lock channel list\n");
                return NULL;
        }
        chan = backends;
        while(chan) {
                if (!strcasecmp(type, chan->type)) {
-                       if (!(chan->capabilities & format)) {
-                               format = ast_translator_best_choice(format, chan->capabilities);
+                       capabilities = chan->capabilities;
+                       fmt = format;
+                       res = ast_translator_best_choice(&fmt, &capabilities);
+                       if (res < 0) {
+                               ast_log(LOG_WARNING, "No translator path exists for channel type %s (native %d) to %d\n", type, chan->capabilities, format);
+                               PTHREAD_MUTEX_UNLOCK(&chlock);
+                               return NULL;
                        }
+                       PTHREAD_MUTEX_UNLOCK(&chlock);
                        if (chan->requester)
-                               c = chan->requester(type, format, data);
-                       pthread_mutex_unlock(&chlock);
-                       break;
+                               c = chan->requester(type, capabilities, data);
+                       return c;
                }
                chan = chan->next;
        }
        if (!chan)
                ast_log(LOG_WARNING, "No channel type registered for '%s'\n", type);
+       PTHREAD_MUTEX_UNLOCK(&chlock);
        return c;
 }
 
@@ -436,6 +571,7 @@ int ast_readstring(struct ast_channel *c, char *s, int len, int timeout, int fti
                if (c->streamid > -1) {
                        d = ast_waitstream(c, AST_DIGIT_ANY);
                        ast_stopstream(c);
+                       usleep(1000);
                        if (!d)
                                d = ast_waitfordigit(c, to);
                } else {
@@ -454,3 +590,130 @@ int ast_readstring(struct ast_channel *c, char *s, int len, int timeout, int fti
        /* Never reached */
        return 0;
 }
+
+int ast_channel_make_compatible(struct ast_channel *chan, struct ast_channel *peer)
+{
+       int peerf;
+       int chanf;
+       int res;
+       peerf = peer->nativeformats;
+       chanf = chan->nativeformats;
+       res = ast_translator_best_choice(&peerf, &chanf);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "No path to translate from %s(%d) to %s(%d)\n", chan, chan->nativeformats, peer, peer->nativeformats);
+               return -1;
+       }
+       /* Set read format on channel */
+       res = ast_set_read_format(chan, peerf);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Unable to set read format on channel %s to %d\n", chan, chanf);
+               return -1;
+       }
+       /* Set write format on peer channel */
+       res = ast_set_write_format(peer, peerf);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Unable to set write format on channel %s to %d\n", peer, peerf);
+               return -1;
+       }
+       /* Now we go the other way */
+       peerf = peer->nativeformats;
+       chanf = chan->nativeformats;
+       res = ast_translator_best_choice(&chanf, &peerf);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "No path to translate from %s(%d) to %s(%d)\n", peer, peer->nativeformats, chan, chan->nativeformats);
+               return -1;
+       }
+       /* Set writeformat on channel */
+       res = ast_set_write_format(chan, chanf);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Unable to set write format on channel %s to %d\n", chan, chanf);
+               return -1;
+       }
+       /* Set read format on peer channel */
+       res = ast_set_read_format(peer, chanf);
+       if (res < 0) {
+               ast_log(LOG_WARNING, "Unable to set read format on channel %s to %d\n", peer, peerf);
+               return -1;
+       }
+       return 0;
+}
+
+
+
+int ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
+{
+       /* Copy voice back and forth between the two channels.  Give the peer
+          the ability to transfer calls with '#<extension' syntax. */
+       struct ast_channel *cs[3];
+       int to = -1;
+       struct ast_frame *f;
+       struct ast_channel *who;
+       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))
+                       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 */
+       }
+       
+       
+       
+       cs[0] = c0;
+       cs[1] = c1;
+       for (/* ever */;;) {
+               who = ast_waitfor_n(cs, 2, &to);
+               if (!who) {
+                       ast_log(LOG_WARNING, "Nobody there??\n");
+                       continue;
+               }
+               f = ast_read(who);
+               if (!f) {
+                       *fo = NULL;
+                       *rc = who;
+                       return 0;
+               }
+               if ((f->frametype == AST_FRAME_CONTROL) && !(flags & AST_BRIDGE_IGNORE_SIGS)) {
+                       *fo = f;
+                       *rc = who;
+                       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;
+                                       /* Take out of conference mode */
+                                       return 0;
+                               } else
+                               if ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1)) {
+                                       *rc = c1;
+                                       *fo = f;
+                                       return 0;
+                               }
+                       } else {
+#if 0
+                               ast_log(LOG_DEBUG, "Read from %s\n", who->name);
+                               if (who == last) 
+                                       ast_log(LOG_DEBUG, "Servicing channel %s twice in a row?\n", last->name);
+                               last = who;
+#endif
+                               if (who == c0) 
+                                       ast_write(c1, f);
+                               else 
+                                       ast_write(c0, f);
+                       }
+                       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;
+}