prevent seg fault with attempt_transfer (bug #2741)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4146 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -1,5 +1,5 @@
- -- chan_h323
-    -- fix summaries for CLI commands 
+ -- chan_sip
+    -- fix to prevent seg fault when attempting a transfer
 Asterisk 1.0.2
  -- Major bugfix release
 Asterisk 1.0.1

channels/chan_sip.c

@@ -7007,54 +7007,69 @@ static int sip_park(struct ast_channel *chan1, struct ast_channel *chan2, struct
 	return -1;
 }
 
+static void ast_quiet_chan(struct ast_channel *chan) {
+	if(chan && chan->_state == AST_STATE_UP) {
+		if(chan->generatordata)
+		ast_deactivate_generator(chan);
+	}
+}
 
 /*--- attempt_transfer: Attempt transfer of SIP call ---*/
 static int attempt_transfer(struct sip_pvt *p1, struct sip_pvt *p2)
 {
+	int res = 0;
+	struct ast_channel
+		*chana = NULL,
+		*chanb = NULL,
+		*bridgea = NULL,
+		*bridgeb = NULL,
+		*peera = NULL,
+		*peerb = NULL,
+		*peerc = NULL;
+
 	if (!p1->owner || !p2->owner) {
 		ast_log(LOG_WARNING, "Transfer attempted without dual ownership?\n");
 		return -1;
 	}
-	if (p1->owner->bridge) {
-		if (p2->owner->bridge)
-			ast_moh_stop(p2->owner->bridge);
-		ast_moh_stop(p1->owner->bridge);
-		ast_moh_stop(p1->owner);
-		ast_moh_stop(p2->owner);
-		if (p1->owner->cdr) {
-			p2->owner->cdr = ast_cdr_append(p2->owner->cdr, p1->owner->cdr);
-			p1->owner->cdr = NULL;
-		}
-		if (p1->owner->bridge->cdr) {
-			p2->owner->cdr = ast_cdr_append(p2->owner->cdr, p1->owner->bridge->cdr);
-			p1->owner->bridge->cdr = NULL;
-		}
-		if (ast_channel_masquerade(p2->owner, p1->owner->bridge)) {
-			ast_log(LOG_WARNING, "Failed to masquerade %s into %s\n", p2->owner->name, p1->owner->bridge->name);
-			return -1;
-		}
-	} else if (p2->owner->bridge) {
-		ast_moh_stop(p2->owner->bridge);
-		ast_moh_stop(p2->owner);
-		ast_moh_stop(p1->owner);
-		if (p2->owner->cdr) {
-			p1->owner->cdr = ast_cdr_append(p1->owner->cdr, p2->owner->cdr);
-			p2->owner->cdr = NULL;
+	chana = p1->owner;
+	chanb = p2->owner;
+	bridgea = p1->owner->bridge;
+	bridgeb = p2->owner->bridge;
+
+	if (bridgea) {
+		peera = chana;
+		peerb = chanb;
+		peerc = bridgea;
+	} else if(bridgeb) {
+		peera = chanb;
+		peerb = chana;
+		peerc = bridgeb;
+	}
+
+	if(peera && peerb && peerc) {
+		ast_quiet_chan(peera);
+		ast_quiet_chan(peerb);
+		ast_quiet_chan(peerc);
+
+		if (peera->cdr && peerb->cdr) {
+			peerb->cdr = ast_cdr_append(peerb->cdr, peera->cdr);
+		} else if(peera->cdr) {
+			peerb->cdr = peera->cdr;
 		}
-		if (p2->owner->bridge->cdr) {
-			p1->owner->cdr = ast_cdr_append(p1->owner->cdr, p2->owner->bridge->cdr);
-			p2->owner->bridge->cdr = NULL;
+		peera->cdr = NULL;
+
+		if (peerb->cdr && peerc->cdr) {
+			peerb->cdr = ast_cdr_append(peerb->cdr, peerc->cdr);
+		} else if(peerc->cdr) {
+			peerb->cdr = peerc->cdr;
 		}
-		if (ast_channel_masquerade(p1->owner, p2->owner->bridge)) {
-			ast_log(LOG_WARNING, "Failed to masquerade %s into %s\n", p1->owner->name, p2->owner->bridge->name);
-			return -1;
+		peerc->cdr = NULL;
+		if (ast_channel_masquerade(peerb, peerc)) {
+			ast_log(LOG_WARNING, "Failed to masquerade %s into %s\n", peerb->name, peerc->name);
+			res = -1;
 		}
+		return res;
 	} else {
-		ast_log(LOG_NOTICE, "Transfer attempted with no bridged calls to transfer\n");
-		if (p1->owner)
-			ast_softhangup_nolock(p1->owner, AST_SOFTHANGUP_DEV);
-		if (p2->owner)
-			ast_softhangup_nolock(p2->owner, AST_SOFTHANGUP_DEV);
 		return -1;
 	}
 	return 0;

res/res_features.c

@@ -302,6 +302,12 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 	int allowdisconnect_in,allowdisconnect_out,allowredirect_in,allowredirect_out;
 	char *monitor_exec;
 
+	if (chan && peer) {
+		pbx_builtin_setvar_helper(chan, "BRIDGEPEER", peer->name);
+		pbx_builtin_setvar_helper(peer, "BRIDGEPEER", chan->name);
+	} else if (chan)
+		pbx_builtin_setvar_helper(chan, "BLINDTRANSFER", NULL);
+
 	if (monitor_ok) {
 		if (!monitor_app) { 
 			if (!(monitor_app = pbx_findapp("Monitor")))
@@ -480,6 +486,8 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 					}
 					/* XXX Maybe we should have another message here instead of invalid extension XXX */
 				} else if (ast_exists_extension(transferee, transferer_real_context, newext, 1, transferer->callerid)) {
+					pbx_builtin_setvar_helper(peer, "BLINDTRANSFER", chan->name);
+					pbx_builtin_setvar_helper(chan, "BLINDTRANSFER", peer->name);
 					ast_moh_stop(transferee);
 					res=ast_autoservice_stop(transferee);
 					if (!transferee->pbx) {