Set #define for TIMER T1 value

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@46650 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -195,6 +195,7 @@ static int expiry = DEFAULT_EXPIRY;
 #define DEFAULT_RETRANS              1000             /*!< How frequently to retransmit Default: 2 * 500 ms in RFC 3261 */
 #define MAX_RETRANS                  6                /*!< Try only 6 times for retransmissions, a total of 7 transmissions */
+#define SIP_TIMER_T1		     500              /* SIP timer T1 (according to RFC 3261) */
 #define SIP_TRANS_TIMEOUT            32000            /*!< SIP request timeout (rfc 3261) 64*T1 
                                                       \todo Use known T1 for timeout (peerpoke)
                                                       */
@@ -2003,7 +2004,7 @@ static void sip_scheddestroy(struct sip_pvt *p, int ms)
 {
 	if (ms < 0) {
 		if (p->timer_t1 == 0)
-			p->timer_t1 = 500;	/* Set timer T1 if not set (RFC 3261) */
+			p->timer_t1 = SIP_TIMER_T1;	/* Set timer T1 if not set (RFC 3261) */
 		ms = p->timer_t1 * 64;
 	}
 	if (sip_debug_test_pvt(p))
@@ -2751,7 +2752,7 @@ static int create_addr(struct sip_pvt *dialog, const char *opeer)
 	if (port)
 		*port++ = '\0';
 	dialog->sa.sin_family = AF_INET;
-	dialog->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
+	dialog->timer_t1 = SIP_TIMER_T1; /* Default SIP retransmission timer T1 (RFC 3261) */
 	peer = find_peer(peername, NULL, 1);
 	if (peer) {
@@ -4199,7 +4200,7 @@ static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *si
 	p->prefs = default_prefs;		/* Set default codecs for this call */
 	if (intended_method != SIP_OPTIONS)	/* Peerpoke has it's own system */
-		p->timer_t1 = 500;	/* Default SIP retransmission timer T1 (RFC 3261) */
+		p->timer_t1 = SIP_TIMER_T1;	/* Default SIP retransmission timer T1 (RFC 3261) */
 	if (sin) {
 		p->sa = *sin;