Change the remote user agent session version variable

from an int to a uint64_t. This prevents potential comparison
problems from happening if the version string exceeds
INT_MAX. This was an apparent problem for one user who could
not properly place a call on hold since the version in the
SDP of the re-INVITE to place the call on hold greatly 
exceeded INT_MAX.

This also aligns with RFC 2327 better since it recommends
using an NTP timestamp for the version (which is a 
64-bit number).


(closes issue #13531)
Reported by: sgofferj
Patches:
      13531.patch uploaded by putnopvut (license 60)
Tested by: sgofferj



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@158230 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -1591,7 +1591,7 @@ struct sip_pvt {
 	char tag[11];				/*!< Our tag for this session */
 	int sessionid;				/*!< SDP Session ID */
 	int sessionversion;			/*!< SDP Session Version */
-	int sessionversion_remote;		/*!< Remote UA's SDP Session Version */
+	uint64_t sessionversion_remote;		/*!< Remote UA's SDP Session Version */
 	int session_modify;			/*!< Session modification request true/false  */
 	struct sockaddr_in sa;			/*!< Our peer */
 	struct sockaddr_in redirip;		/*!< Where our RTP should be going if not to us */
@@ -7233,7 +7233,7 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
 	int last_rtpmap_codec=0;
 	char buf[SIPBUFSIZE];
-	int rua_version;
+	uint64_t rua_version;
 	
 	int red_data_pt[10];
 	int red_num_gen = 0;
@@ -7309,7 +7309,7 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
 		ast_log(LOG_WARNING, "SDP syntax error in o= line\n");
 		return -1;
 	}
-	if (!sscanf(token, "%d", &rua_version)) {
+	if (!sscanf(token, "%lu", &rua_version)) {
 		ast_log(LOG_WARNING, "SDP syntax error in o= line version\n");
 		return -1;
 	}