/ added fax detection support

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5133 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_vpb.c b/channels/chan_vpb.c
index d2e48d9b5764cb85873df187e9eb68f59dc15767..8d1d11da9eed6bbf857d55f43454e720789fa8ed 100755 (executable)
--- a/channels/chan_vpb.c
+++ b/channels/chan_vpb.c
@@ -302,6 +302,8 @@ static struct vpb_pvt {
        ast_mutex_t play_dtmf_lock;
        char play_dtmf[16];
 
+       int faxhandled;                         /* has a fax tone been handled ? */
+
        struct vpb_pvt *next;                   /* Next channel in list */
 
 } *iflist = NULL;
@@ -807,7 +809,26 @@ static inline int monitor_handle_owned(struct vpb_pvt *p, VPB_EVENT *e)
                                else {
                                        f.subclass = AST_CONTROL_BUSY;
                                }
-                       } else if (e->data == VPB_GRUNT) {
+                       } 
+                       else if (e->data == VPB_FAX){
+                               if (!p->faxhandled){
+                                       if (strcmp(p->owner->exten, "fax")) {
+                                               if (ast_exists_extension(p->owner, ast_strlen_zero(p->owner->macrocontext) ? p->owner->context : p->owner->macrocontext, "fax", 1, p->owner->cid.cid_num)) {
+                                                       if (option_verbose > 2)
+                                                               ast_verbose(VERBOSE_PREFIX_3 "Redirecting %s to fax extension\n", p->owner->name);
+                                                       /* Save the DID/DNIS when we transfer the fax call to a "fax" extension */
+                                                       pbx_builtin_setvar_helper(p->owner,"FAXEXTEN",p->owner->exten);
+                                                       if (ast_async_goto(p->owner, p->owner->context, "fax", 1))
+                                                               ast_log(LOG_WARNING, "Failed to async goto '%s' into fax of '%s'\n", p->owner->name, p->owner->context);
+                                               } else
+                                                       ast_log(LOG_NOTICE, "Fax detected, but no fax extension\n");
+                                       } else
+                                               ast_log(LOG_DEBUG, "Already in a fax extension, not redirecting\n");
+                               } else
+                                       ast_log(LOG_DEBUG, "Fax already handled\n");
+
+                       } 
+                       else if (e->data == VPB_GRUNT) {
                                if( ( get_time_in_ms() - p->lastgrunt ) > gruntdetect_timeout ) {
                                        /* Nothing heard on line for a very long time
                                         * Timeout connection */
@@ -819,8 +840,10 @@ static inline int monitor_handle_owned(struct vpb_pvt *p, VPB_EVENT *e)
                                        p->lastgrunt = get_time_in_ms();
                                        f.frametype = -1;
                                }
-                       } else
+                       } 
+                       else {
                                f.frametype = -1;
+                       }
                        break;
 
                case VPB_CALLEND:
@@ -2462,6 +2485,7 @@ static struct ast_channel *vpb_new(struct vpb_pvt *me, int state, char *context)
                me->last_ignore_dtmf = 1;
                me->readthread = 0;
                me->play_dtmf[0] = '\0';
+               me->faxhandled =0;
                
                me->lastgrunt  = get_time_in_ms(); /* Assume at least one grunt tone seen now. */