[sr-dev] dns failover and send socket

Hello, when using dns failover (SRV records) with kamailio 3.2 I noticed, that the failover sip message (to the failover host specified by DNS) is sent from a different socket. For example: incoming sip message is on socket ip1:5060 => send socket for relayed message (original) is ip1:5060 but send socket for relayed message (failover) is ip2:5060 reparse_on_dns_failover is left on its default value (1). In the the relayed message (failover): Reord-Route-Header is as in original message (ip1:5060) - correct Via-Header is ip2:5060 (matching the send socket) - incorrect This is exactly the opposite case regarding the README: "Disadvantage: only the via header is replaced in the message buffer, so the outgoing socket address is not corrected in any other part of the message. It is dangerous on multihomed hosts: when the new SIP request after the DNS failover is sent via different interface than the first request, the message can contain incorrect ip address in the Record-Route header for instance." I think the message was rebuilt, because only VIA header and send socket changed. Looking into forward.c: 598 #ifdef USE_DNS_FAILOVER 599 if (prev_send_sock!=send_info->send_sock){ 600 /* rebuild the message only if the send_sock changed */ But I did not change the send socket... any ideas why this condition is true? Cheers and a happy new 2013 Jasmin