[sr-dev] [kamailio/kamailio] Possible bug with track_cseq_updates set in dialog (#789)

[scfcplummy]

Hi,

When setting "track_cseq_updates" in dialog module, the ReINVITE that should be initiated with uac_auth() is never sent. Without "track_cseq_updates" set to 0, the reINVITE does take place.

In the log I can see dialog doing the cseq update:

Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_cseq.c:129]: dlg_cseq_update(): initiating cseq updates
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_hash.c:690]: dlg_lookup(): ref dlg 0x7fc2b265f4f0 with 1 -> 2
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_hash.c:692]: dlg_lookup(): dialog id=4263 found on entry 1771
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_var.c:250]: print_lists(): Internal var-list ((nil)):
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_var.c:260]: print_lists(): Dialog var-list (0x7fc2b265f2d8):
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_var.c:262]: print_lists(): cseq_diff=1 (flags 1)
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: DEBUG: dialog [dlg_cseq.c:176]: dlg_cseq_update(): adding auth cseq header value: 5136

but quickly followed by these errors:

Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: ERROR: <core> [msg_translator.c:417]: clen_builder(): no message body found (missing crlf?)
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: ERROR: <core> [msg_translator.c:1963]: build_req_buf_from_sip_req(): Error while adjusting Content-Length
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: ERROR: tm [t_fwd.c:462]: prepare_new_uac(): could not build request
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: ERROR: tm [t_fwd.c:1723]: t_forward_nonack(): ERROR: t_forward_nonack: failure to add branches
Sep 20 07:54:57 sbc /usr/local/sbin/kamailio[35746]: ERROR: tm [tm.c:1415]: _w_t_relay_to(): ERROR: w_t_relay_to: t_relay_to failed

Kamailio was built from kamailio-4.4.3 source downloaded from here:

https://www.kamailio.org/pub/kamailio/latest/src/

Version information:

version: kamailio 4.4.3 (x86_64/linux) 5a2195
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 5a2195
compiled on 08:46:12 Sep 16 2016 with gcc 5.4.0

Many thanks

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