For those very verbose SIP implementations that attach tons of info to the Contact header... let's increase our variable sizes. (issue #9535 reported by jeffg)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@61648 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -5610,7 +5610,7 @@ static int respprep(struct sip_request *resp, struct sip_pvt *p, const char *msg
 		snprintf(tmp, sizeof(tmp), "%d", p->expiry);
 		add_header(resp, "Expires", tmp);
 		if (p->expiry) {	/* Only add contact if we have an expiry time */
-			char contact[256];
+			char contact[BUFSIZ];
 			snprintf(contact, sizeof(contact), "%s;expires=%d", p->our_contact, p->expiry);
 			add_header(resp, "Contact", contact);	/* Not when we unregister */
 		}
@@ -6533,7 +6533,7 @@ static int transmit_reinvite_with_t38_sdp(struct sip_pvt *p)
 /*! \brief Check Contact: URI of SIP message */
 static void extract_uri(struct sip_pvt *p, struct sip_request *req)
 {
-	char stripped[256];
+	char stripped[BUFSIZ];
 	char *c;
 
 	ast_copy_string(stripped, get_header(req, "Contact"), sizeof(stripped));
@@ -7665,7 +7665,7 @@ static void reg_source_db(struct sip_peer *peer)
 /*! \brief Save contact header for 200 OK on INVITE */
 static int parse_ok_contact(struct sip_pvt *pvt, struct sip_request *req)
 {
-	char contact[250]; 
+	char contact[BUFSIZ]; 
 	char *c;
 
 	/* Look for brackets */
@@ -11578,7 +11578,7 @@ static struct ast_custom_function sipchaninfo_function = {
 /*! \brief Parse 302 Moved temporalily response */
 static void parse_moved_contact(struct sip_pvt *p, struct sip_request *req)
 {
-	char tmp[256];
+	char tmp[BUFSIZ];
 	char *s, *e;
 	char *domain;