- newip = ct->tuplehash[!dir].tuple.dst.u3.ip;
-
- exp->saved_ip = exp->tuple.dst.u3.ip;
- exp->tuple.dst.u3.ip = newip;
- exp->saved_proto.udp.port = exp->tuple.dst.u.udp.port;
- exp->dir = !dir;
-
- /* When you see the packet, we need to NAT it the same as the
- this one. */
- exp->expectfn = ip_nat_sip_expected;
-
- /* Try to get same port: if not, try to change it. */
- for (port = ntohs(exp->saved_proto.udp.port); port != 0; port++) {
- exp->tuple.dst.u.udp.port = htons(port);
- if (nf_ct_expect_related(exp) == 0)
+ rtp_addr->ip = ct->tuplehash[!dir].tuple.dst.u3.ip;
+
+ rtp_exp->saved_ip = rtp_exp->tuple.dst.u3.ip;
+ rtp_exp->tuple.dst.u3.ip = rtp_addr->ip;
+ rtp_exp->saved_proto.udp.port = rtp_exp->tuple.dst.u.udp.port;
+ rtp_exp->dir = !dir;
+ rtp_exp->expectfn = ip_nat_sip_expected;
+
+ rtcp_exp->saved_ip = rtcp_exp->tuple.dst.u3.ip;
+ rtcp_exp->tuple.dst.u3.ip = rtp_addr->ip;
+ rtcp_exp->saved_proto.udp.port = rtcp_exp->tuple.dst.u.udp.port;
+ rtcp_exp->dir = !dir;
+ rtcp_exp->expectfn = ip_nat_sip_expected;
+
+ /* Try to get same pair of ports: if not, try to change them. */
+ for (port = ntohs(rtp_exp->tuple.dst.u.udp.port);
+ port != 0; port += 2) {
+ rtp_exp->tuple.dst.u.udp.port = htons(port);
+ if (nf_ct_expect_related(rtp_exp) != 0)
+ continue;
+ rtcp_exp->tuple.dst.u.udp.port = htons(port + 1);
+ if (nf_ct_expect_related(rtcp_exp) == 0)