chan_sip: Revert r398835 due to failing tests involving originate

(issue ASTERISK-22424)
Reported by: Jonathan Rose
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Merged revisions 398977 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 398986 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 398991 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@399006 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -23250,15 +23250,6 @@ static void handle_response_invite(struct sip_pvt *p, int resp, const char *rest
 					ast_set_flag(&p->flags[0], SIP_PENDINGBYE);
 				}
 			ast_rtp_instance_activate(p->rtp);
-		} else if (!reinvite) {
-			struct ast_sockaddr remote_address = {{0,}};
-
-			ast_rtp_instance_get_remote_address(p->rtp, &remote_address);
-			if (ast_sockaddr_isnull(&remote_address) || (!ast_strlen_zero(p->theirprovtag) && strcmp(p->theirtag, p->theirprovtag))) {
-				ast_log(LOG_WARNING, "Received response: \"200 OK\" from '%s' without SDP\n", p->relatedpeer->name);
-				ast_set_flag(&p->flags[0], SIP_PENDINGBYE);
-				ast_rtp_instance_activate(p->rtp);
-			}
 		}
 
 		if (!req->ignore && p->owner) {
@@ -24209,11 +24200,7 @@ static void handle_response(struct sip_pvt *p, int resp, const char *rest, struc
 
 		gettag(req, "To", tag, sizeof(tag));
 		ast_string_field_set(p, theirtag, tag);
-	} else {
-		/* Store theirtag to track for changes when 200 responses to invites are received without SDP */
-		ast_string_field_set(p, theirprovtag, p->theirtag);
 	}
-
 	/* This needs to be configurable on a channel/peer level,
 	   not mandatory for all communication. Sadly enough, NAT implementations
 	   are not so stable so we can always rely on these headers.

channels/sip/include/sip.h

@@ -1019,7 +1019,6 @@ struct sip_pvt {
 		AST_STRING_FIELD(rdnis);        /*!< Referring DNIS */
 		AST_STRING_FIELD(redircause);   /*!< Referring cause */
 		AST_STRING_FIELD(theirtag);     /*!< Their tag */
-		AST_STRING_FIELD(theirprovtag); /*!< Provisional their tag, used when evaluating responses to invites */
 		AST_STRING_FIELD(tag);          /*!< Our tag for this session */
 		AST_STRING_FIELD(username);     /*!< [user] name */
 		AST_STRING_FIELD(peername);     /*!< [peer] name, not set if [user] */