--- rtp.c       2006-05-24 15:14:42.000000000 +0200
+++ rtp_patched.c       2006-05-24 15:28:50.000000000 +0200
 -66,6 +66,15 @@
 static int rtpend = 0;
 static int rtpdebug = 0;               /* Are we debugging? */
 static struct sockaddr_in rtpdebugaddr;        /* Debug packets to/from this host */
+
+
+/* *** PATCHED *** */
+static struct in_addr rtp_bindaddr;
+/* ************** */
+
+
+
+
 #ifdef SO_NO_CHECK
 static int nochecksums = 0;
 #endif
 -958,7 +967,11 @@
        for (;;) {
                /* Must be an even port number by RTP spec */
                rtp->us.sin_port = htons(x);
-               rtp->us.sin_addr = addr;
+
+
+               //PATCHED ->>> rtp->us.sin_addr = addr;
+               rtp->us.sin_addr = (rtp_bindaddr.s_addr != 0 ? rtp_bindaddr : addr);
+
                /* If there's rtcp, initialize it as well. */
                if (rtp->rtcp)
                        rtp->rtcp->us.sin_port = htons(x + 1);
 -1825,6 +1838,12 @@
        struct ast_config *cfg;
        char *s;

+// PATCHED
+       struct ast_hostent ahp;
+        struct hostent *hp;
+
+
+
        rtpstart = 5000;
        rtpend = 31000;
        dtmftimeout = DEFAULT_DTMF_TIMEOUT;
 -1844,7 +1863,21 @@
                        if (rtpend > 65535)
                                rtpend = 65535;
                }
-               if ((s = ast_variable_retrieve(cfg, "general", "rtpchecksums"))) {
+
+
+               /* *** PATCHED *** */
+                if ((s = ast_variable_retrieve(cfg, "general", "rtp_bindaddr"))) {
+                               if (!(hp = ast_gethostbyname(s, &ahp))) {
+                        ast_log(LOG_WARNING, "Invalid address: %s\n", s);
+                               } else {
+                        memcpy(&rtp_bindaddr, hp->h_addr, sizeof(rtp_bindaddr));
+                               }
+                }
+                /* ************** */
+
+
+
+       if ((s = ast_variable_retrieve(cfg, "general", "rtpchecksums"))) {
 #ifdef SO_NO_CHECK
                        if (ast_false(s))
                                nochecksums = 1;