as i reported on sr-users list, i noticed that sometimes rtpengine requests from kamailio set ip header don't fragment flag that causes icmp error message from a router on the path to rtpengine. as result, rtpengine modules things that the rtpengine is dead.
enclosed is an example of such an ip packet.
after i made this kind of patch to rtpengine.c, the flag is not set
anymore:
*** /usr/src/orig/kamailio/modules/rtpengine/rtpengine.c 2015-06-16
12:33:56.497242900 +0300
--- rtpengine.c 2015-06-29 09:03:26.959479313 +0300
***************
*** 1059,1064 ****
--- 1059,1065 ----
struct addrinfo hints, *res;
struct rtpp_set *rtpp_list;
struct rtpp_node *pnode;
+ int ip_mtu_discover = IP_PMTUDISC_DONT;
if(rtpp_set_list==NULL )
return 0;
***************
*** 1121,1126 ****
--- 1122,1131 ----
return -1;
}
+ setsockopt(rtpp_socks[pnode->idx], IPPROTO_IP,
+ IP_MTU_DISCOVER, &ip_mtu_discover,
+ sizeof(ip_mtu_discover));
+
if (bind_force_send_ip(pnode->idx) == -1) {
LM_ERR("can't bind socket\n");
close(rtpp_socks[pnode->idx]);
any comments on this?
-- juha
rtpengine_offer.pcapng
Description: rtpengine_offer.pcapng
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