Respect the maddr parameter in the Via header.

(closes issue #14446)
Reported by: frawd
Patches:
      via_maddr.patch uploaded by frawd (license 610)
Tested by: frawd

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@230144 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 87244ab2c476e3147a061d8ef1bdaf02c7f30a04..368de4b58a4a1b40e4eb5c23414bc853277a19cc 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -9932,7 +9932,7 @@ static int get_also_info(struct sip_pvt *p, struct sip_request *oreq)
 static void check_via(struct sip_pvt *p, const struct sip_request *req)
 {
        char via[512];
-       char *c, *pt;
+       char *c, *pt, *maddr;
        struct hostent *hp;
        struct ast_hostent ahp;
 
@@ -9948,8 +9948,16 @@ static void check_via(struct sip_pvt *p, const struct sip_request *req)
        if (c && (c[6] != '=')) /* rport query, not answer */
                ast_set_flag(&p->flags[1], SIP_PAGE2_RPORT_PRESENT);
 
+       /* Check for maddr */
+       maddr = strstr(via, "maddr=");
+       if (maddr) {
+               maddr += 6;
+               c = maddr + strspn(maddr, "0123456789.");
+               *c = '\0';
+       }
+
        c = strchr(via, ';');
-       if (c) 
+       if (c)
                *c = '\0';
 
        c = strchr(via, ' ');
@@ -9963,6 +9971,9 @@ static void check_via(struct sip_pvt *p, const struct sip_request *req)
                pt = strchr(c, ':');
                if (pt)
                        *pt++ = '\0';   /* remember port pointer */
+               /* Use maddr if found */
+               if (maddr)
+                       c = maddr;
                hp = ast_gethostbyname(c, &ahp);
                if (!hp) {
                        ast_log(LOG_WARNING, "'%s' is not a valid host\n", c);