Version 0.1.8 from FTP
[asterisk/asterisk.git] / pbx.c
diff --git a/pbx.c b/pbx.c
index 99d09ea..e70a23f 100755 (executable)
--- a/pbx.c
+++ b/pbx.c
@@ -61,6 +61,11 @@ struct ast_exten {
        struct ast_exten *next;
 };
 
+struct ast_include {
+       char name[AST_MAX_EXTENSION];
+       struct ast_include *next;
+};
+
 /* An extension context */
 struct ast_context {
        /* Name of the context */
@@ -71,6 +76,8 @@ struct ast_context {
        struct ast_exten *root;
        /* Link them together */
        struct ast_context *next;
+       /* Include other contexts */
+       struct ast_include *includes;
 };
 
 
@@ -158,6 +165,9 @@ static int pbx_exec(struct ast_channel *c, /* Channel */
 }
 
 
+/* Go no deeper than this through includes (not counting loops) */
+#define AST_PBX_MAX_STACK      64
+
 #define HELPER_EXISTS 0
 #define HELPER_SPAWN 1
 #define HELPER_EXEC 2
@@ -185,7 +195,7 @@ static void pbx_destroy(struct ast_pbx *p)
        free(p);
 }
 
-static int extension_match(char *pattern, char *data)
+static inline int extension_match(char *pattern, char *data)
 {
        int match;
        /* If they're the same return */
@@ -271,13 +281,82 @@ struct ast_context *ast_context_find(char *name)
        return tmp;
 }
 
-static int pbx_extension_helper(struct ast_channel *c, char *context, char *exten, int priority, int action) 
+#define STATUS_NO_CONTEXT   1
+#define STATUS_NO_EXTENSION 2
+#define STATUS_NO_PRIORITY  3
+#define STATUS_SUCCESS     4
+
+static struct ast_exten *pbx_find_extension(char *context, char *exten, int priority, int action, char *incstack[], int *stacklen, int *status)
 {
+       int x;
        struct ast_context *tmp;
-       struct ast_exten *e, *reale;
+       struct ast_exten *e, *eroot;
+       struct ast_include *i;
+       /* Initialize status if appropriate */
+       if (!*stacklen)
+               *status = STATUS_NO_CONTEXT;
+       /* Check for stack overflow */
+       if (*stacklen >= AST_PBX_MAX_STACK) {
+               ast_log(LOG_WARNING, "Maximum PBX stack exceeded\n");
+               return NULL;
+       }
+       /* Check first to see if we've already been checked */
+       for (x=0;x<*stacklen;x++) {
+               if (!strcasecmp(incstack[x], context))
+                       return NULL;
+       }
+       tmp = contexts;
+       while(tmp) {
+               /* Match context */
+               if (!strcasecmp(tmp->name, context)) {
+                       if (*status < STATUS_NO_EXTENSION)
+                               *status = STATUS_NO_EXTENSION;
+                       eroot = tmp->root;
+                       while(eroot) {
+                               /* Match extension */
+                               if (extension_match(eroot->exten, exten) ||
+                                               ((action == HELPER_CANMATCH) && (extension_close(eroot->exten, exten)))) {
+                                               e = eroot;
+                                               if (*status < STATUS_NO_PRIORITY)
+                                                       *status = STATUS_NO_PRIORITY;
+                                               while(e) {
+                                                       /* Match priority */
+                                                       if (e->priority == priority) {
+                                                               *status = STATUS_SUCCESS;
+                                                               return e;
+                                                       }
+                                                       e = e->peer;
+                                               }
+                               }
+                               eroot = eroot->next;
+                       }
+                       /* Setup the stack */
+                       incstack[*stacklen] = tmp->name;
+                       (*stacklen)++;
+                       /* Now try any includes we have in this context */
+                       i = tmp->includes;
+                       while(i) {
+                               if ((e = pbx_find_extension(i->name, exten, priority, action, incstack, stacklen, status))) 
+                                       return e;
+                               i = i->next;
+                       }
+               }
+               tmp = tmp->next;
+       }
+       return NULL;
+}
+
+static int pbx_extension_helper(struct ast_channel *c, char *context, char *exten, int priority, int action) 
+{
+       struct ast_exten *e;
        struct ast_app *app;
        int newstack = 0;
        int res;
+       int status = 0;
+       char *incstack[AST_PBX_MAX_STACK];
+       int stacklen = 0;
+
+
        if (pthread_mutex_lock(&conlock)) {
                ast_log(LOG_WARNING, "Unable to obtain lock\n");
                if ((action == HELPER_EXISTS) || (action == HELPER_CANMATCH))
@@ -285,6 +364,70 @@ static int pbx_extension_helper(struct ast_channel *c, char *context, char *exte
                else
                        return -1;
        }
+       e = pbx_find_extension(context, exten, priority, action, incstack, &stacklen, &status);
+       if (e) {
+               switch(action) {
+               case HELPER_CANMATCH:
+                       pthread_mutex_unlock(&conlock);
+                       return -1;
+               case HELPER_EXISTS:
+                       pthread_mutex_unlock(&conlock);
+                       return -1;
+               case HELPER_SPAWN:
+                       newstack++;
+                       /* Fall through */
+               case HELPER_EXEC:
+                       app = pbx_findapp(e->app);
+                       pthread_mutex_unlock(&conlock);
+                       if (app) {
+                               strncpy(c->context, context, sizeof(c->context));
+                               strncpy(c->exten, exten, sizeof(c->exten));
+                               c->priority = priority;
+                               if (option_debug)
+                                               ast_log(LOG_DEBUG, "Launching '%s'\n", app->name);
+                               else if (option_verbose > 2)
+                                               ast_verbose( VERBOSE_PREFIX_3 "Executing %s(\"%s\", \"%s\") %s\n", 
+                                                               app->name, c->name, (e->data ? (char *)e->data : NULL), (newstack ? "in new stack" : "in same stack"));
+                               c->appl = app->name;
+                               c->data = e->data;              
+                               res = pbx_exec(c, app->execute, e->data, newstack);
+                               c->appl = NULL;
+                               c->data = NULL;
+                               pthread_mutex_unlock(&conlock);
+                               return res;
+                       } else {
+                               ast_log(LOG_WARNING, "No application '%s' for extension (%s, %s, %d)\n", e->app, context, exten, priority);
+                               return -1;
+                       }
+               default:
+                       ast_log(LOG_WARNING, "Huh (%d)?\n", action);
+                       return -1;
+               }
+       } else {
+               pthread_mutex_unlock(&conlock);
+               switch(status) {
+               case STATUS_NO_CONTEXT:
+                       if (action != HELPER_EXISTS)
+                               ast_log(LOG_NOTICE, "Cannot find extension context '%s'\n", context);
+                       break;
+               case STATUS_NO_EXTENSION:
+                       if ((action != HELPER_EXISTS) && (action !=  HELPER_CANMATCH))
+                               ast_log(LOG_NOTICE, "Cannot find extension '%s' in context '%s'\n", exten, context);
+                       break;
+               case STATUS_NO_PRIORITY:
+                       if ((action != HELPER_EXISTS) && (action !=  HELPER_CANMATCH))
+                               ast_log(LOG_NOTICE, "No such priority %d in extension '%s' in context '%s'\n", priority, exten, context);
+                       break;
+               default:
+                       ast_log(LOG_DEBUG, "Shouldn't happen!\n");
+               }
+               if ((action != HELPER_EXISTS) && (action != HELPER_CANMATCH))
+                       return -1;
+               else
+                       return 0;
+       }
+
+#if 0          
        tmp = contexts;
        while(tmp) {
                if (!strcasecmp(tmp->name, context)) {
@@ -370,9 +513,12 @@ static int pbx_extension_helper(struct ast_channel *c, char *context, char *exte
                return -1;
        } else
                return 0;
+#endif
 }
+
 int ast_pbx_longest_extension(char *context) 
 {
+       /* XXX Not include-aware XXX */
        struct ast_context *tmp;
        struct ast_exten *e;
        int len = 0;
@@ -418,24 +564,36 @@ int ast_spawn_extension(struct ast_channel *c, char *context, char *exten, int p
        return pbx_extension_helper(c, context, exten, priority, HELPER_SPAWN);
 }
 
-static void *pbx_thread(void *data)
+int ast_pbx_run(struct ast_channel *c)
 {
-       /* Oh joyeous kernel, we're a new thread, with nothing to do but
-          answer this channel and get it going.  The setjmp stuff is fairly
-          confusing, but necessary to get smooth transitions between
-          the execution of different applications (without the use of
-          additional threads) */
-       struct ast_channel *c = data;
        int firstpass = 1;
        char digit;
        char exten[256];
        int pos;
        int waittime;
        int res=0;
+
+       /* A little initial setup here */
+       if (c->pbx)
+               ast_log(LOG_WARNING, "%s already has PBX structure??\n");
+       c->pbx = malloc(sizeof(struct ast_pbx));
+       if (!c->pbx) {
+               ast_log(LOG_WARNING, "Out of memory\n");
+               return -1;
+       }
+       memset(c->pbx, 0, sizeof(struct ast_pbx));
+       /* Set reasonable defaults */
+       c->pbx->rtimeout = 10;
+       c->pbx->dtimeout = 5;
+
        if (option_debug)
                ast_log(LOG_DEBUG, "PBX_THREAD(%s)\n", c->name);
-       else if (option_verbose > 1)
-               ast_verbose( VERBOSE_PREFIX_2 "Accepting call on '%s'\n", c->name);
+       else if (option_verbose > 1) {
+               if (c->callerid)
+                       ast_verbose( VERBOSE_PREFIX_2 "Accepting call on '%s' (%s)\n", c->name, c->callerid);
+               else
+                       ast_verbose( VERBOSE_PREFIX_2 "Accepting call on '%s'\n", c->name);
+       }
                
        
        /* Start by trying whatever the channel is set to */
@@ -467,12 +625,15 @@ static void *pbx_thread(void *data)
                                goto out;
                        }
                        /* If we're playing something in the background, wait for it to finish or for a digit */
-                       if (c->stream || (c->trans && c->trans->stream)) {
+                       if (c->stream) {
                                digit = ast_waitstream(c, AST_DIGIT_ANY);
                                ast_stopstream(c);
                                /* Hang up if something goes wrong */
-                               if (digit < 0)
+                               if (digit < 0) {
+                                       if (option_verbose > 2)
+                                               ast_verbose(VERBOSE_PREFIX_3 "Lost connection on %s\n", c->name);
                                        goto out;
+                               }
                                else if (digit) {
                                        exten[pos++] = digit;
                                        break;
@@ -487,7 +648,7 @@ static void *pbx_thread(void *data)
                else
                        waittime = c->pbx->rtimeout;
                while(!ast_exists_extension(c, c->context, exten, 1) && 
-                     ast_canmatch_extension(c, c->context, exten, 1)) {
+                      ast_canmatch_extension(c, c->context, exten, 1)) {
                        /* As long as we're willing to wait, and as long as it's not defined, 
                           keep reading digits until we can't possibly get a right answer anymore.  */
                        digit = ast_waitfordigit(c, waittime * 1000);
@@ -538,8 +699,20 @@ out:
        c->pbx = NULL;
        if (res != AST_PBX_KEEPALIVE)
                ast_hangup(c);
+       return 0;
+}
+
+static void *pbx_thread(void *data)
+{
+       /* Oh joyeous kernel, we're a new thread, with nothing to do but
+          answer this channel and get it going.  The setjmp stuff is fairly
+          confusing, but necessary to get smooth transitions between
+          the execution of different applications (without the use of
+          additional threads) */
+       struct ast_channel *c = data;
+       ast_pbx_run(c);
        pthread_exit(NULL);
-       
+       return NULL;
 }
 
 int ast_pbx_start(struct ast_channel *c)
@@ -549,17 +722,6 @@ int ast_pbx_start(struct ast_channel *c)
                ast_log(LOG_WARNING, "Asked to start thread on NULL channel?\n");
                return -1;
        }
-       if (c->pbx)
-               ast_log(LOG_WARNING, "%s already has PBX structure??\n");
-       c->pbx = malloc(sizeof(struct ast_pbx));
-       if (!c->pbx) {
-               ast_log(LOG_WARNING, "Out of memory\n");
-               return -1;
-       }
-       memset(c->pbx, 0, sizeof(struct ast_pbx));
-       /* Set reasonable defaults */
-       c->pbx->rtimeout = 10;
-       c->pbx->dtimeout = 5;
        /* Start a new thread, and get something handling this channel. */
        if (pthread_create(&t, NULL, pbx_thread, c)) {
                ast_log(LOG_WARNING, "Failed to create new channel thread\n");
@@ -652,6 +814,7 @@ struct ast_context *ast_context_create(char *name)
                strncpy(tmp->name, name, sizeof(tmp->name));
                tmp->root = NULL;
                tmp->next = contexts;
+               tmp->includes = NULL;
                contexts = tmp;
                if (option_debug)
                        ast_log(LOG_DEBUG, "Registered context '%s'\n", tmp->name);
@@ -664,6 +827,36 @@ struct ast_context *ast_context_create(char *name)
        return tmp;
 }
 
+int ast_context_add_include2(struct ast_context *con, char *value)
+{
+       struct ast_include *inc, *incc, *incl = NULL;
+       inc = malloc(sizeof(struct ast_include));
+       if (!inc) {
+               ast_log(LOG_WARNING, "Out of memory\n");
+               return -1;
+       }
+       strncpy(inc->name, value, sizeof(inc->name));
+       inc->next = NULL;
+       pthread_mutex_lock(&con->lock);
+       incc = con->includes;
+       while(incc) {
+               incl = incc;
+               if (!strcasecmp(incc->name, value)) {
+                       /* Already there */
+                       pthread_mutex_unlock(&con->lock);
+                       return 0;
+               }
+               incc = incc->next;
+       }
+       if (incl) 
+               incl->next = inc;
+       else
+               con->includes = inc;
+       pthread_mutex_unlock(&con->lock);
+       return 0;
+       
+}
+
 int ast_add_extension2(struct ast_context *con,
                                          int replace, char *extension, int priority,
                                          char *application, void *data, void (*datad)(void *))
@@ -812,6 +1005,7 @@ int ast_add_extension2(struct ast_context *con,
 void ast_context_destroy(struct ast_context *con)
 {
        struct ast_context *tmp, *tmpl=NULL;
+       struct ast_include *tmpi, *tmpil= NULL;
        pthread_mutex_lock(&conlock);
        tmp = contexts;
        while(tmp) {
@@ -829,6 +1023,13 @@ void ast_context_destroy(struct ast_context *con)
                        /* Okay, now we're safe to let it go -- in a sense, we were
                           ready to let it go as soon as we locked it. */
                        pthread_mutex_unlock(&tmp->lock);
+                       for (tmpi = tmp->includes; tmpi; ) {
+                               /* Free includes */
+                               tmpil = tmpi;
+                               tmpi = tmpi->next;
+                               free(tmpil);
+                               tmpil = tmpi;
+                       }
                        free(tmp);
                        pthread_mutex_unlock(&conlock);
                        return;