Merged revisions 92815 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r92815 | tilghman | 2007-12-13 15:28:39 -0600 (Thu, 13 Dec 2007) | 5 lines

Properly initialize polarity statuses, so that they are detected properly.
Reported by: julianjm
Patch by: julianjm
(Closes issue #10238)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@92816 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -4282,6 +4282,11 @@ static struct ast_frame *zt_handle_event(struct ast_channel *ast)
 							ast_setstate(ast, AST_STATE_UP);
 							p->subs[index].f.frametype = AST_FRAME_CONTROL;
 							p->subs[index].f.subclass = AST_CONTROL_ANSWER;
+							/* If aops=0 and hops=1, this is necessary */
+							p->polarity = POLARITY_REV;
+						} else {
+							/* Start clean, so we can catch the change to REV polarity when party answers */
+							p->polarity = POLARITY_IDLE;
 						}
 					}
 				}
@@ -6933,6 +6938,14 @@ static void *ss_thread(void *data)
 					if (i & ZT_IOMUX_SIGEVENT) {
 						res = zt_get_event(p->subs[index].zfd);
 						ast_log(LOG_NOTICE, "Got event %d (%s)...\n", res, event2str(res));
+						/* If we get a PR event, they hung up while processing calerid */
+						if ( res == ZT_EVENT_POLARITY && p->hanguponpolarityswitch && p->polarity == POLARITY_REV) {
+							ast_log(LOG_DEBUG, "Hanging up due to polarity reversal on channel %d while detecting callerid\n", p->channel);
+							p->polarity = POLARITY_IDLE;
+							callerid_free(cs);
+							ast_hangup(chan);
+							return NULL;
+						}
 						res = 0;
 						/* Let us detect callerid when the telco uses distinctive ring */
 
@@ -7305,6 +7318,12 @@ static int handle_init_event(struct zt_pvt *i, int event)
 		case SIG_FXSLS:
 		case SIG_FXSKS:
 		case SIG_FXSGS:
+			/* We have already got a PR before the channel was 
+			   created, but it wasn't handled. We need polarity 
+			   to be REV for remote hangup detection to work. 
+			   At least in Spain */
+			if (i->hanguponpolarityswitch)
+				i->polarity = POLARITY_REV;
 			if (i->cid_start == CID_START_POLARITY || i->cid_start == CID_START_POLARITY_IN) {
 				i->polarity = POLARITY_REV;
 				ast_verb(2, "Starting post polarity "