Module: sip-router Branch: master Commit: b66033d0546bf57cfb0cd16f1072da80c5a79d34 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=b66033d0...

Author: Daniel-Constantin Mierla miconda@gmail.com Committer: Daniel-Constantin Mierla miconda@gmail.com Date: Fri Sep 26 08:59:17 2014 +0200

tm: extra checks to see if the transaction was canceled before forwarding branches

- catch cases when CANCEL arrives during branch_route execution - reported Sławomir Bocheński, FS#468

---

modules/tm/t_fwd.c | 26 +++++++++++++++++++------- 1 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/modules/tm/t_fwd.c b/modules/tm/t_fwd.c index 3903679..61b6e6a 100644 --- a/modules/tm/t_fwd.c +++ b/modules/tm/t_fwd.c @@ -1664,11 +1664,10 @@ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , /* make -Wall happy */ current_uri.s=0;

- if (t->flags & T_CANCELED){ - DBG("t_forward_non_ack: no forwarding on a canceled transaction\n"); - ser_error=E_CANCELED; - return -1; - } + getbflagsval(0, &backup_bflags); + + if (t->flags & T_CANCELED) goto canceled; + if (p_msg->REQ_METHOD==METHOD_CANCEL) { t_invite=t_lookupOriginalT( p_msg ); if (t_invite!=T_NULL_CELL) { @@ -1681,8 +1680,6 @@ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , } }

- getbflagsval(0, &backup_bflags); - /* if no more specific error code is known, use this */ lowest_ret=E_UNSPEC; /* branches added */ @@ -1727,6 +1724,8 @@ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , p_msg->fwd_send_flags, proto, (p_msg->dst_uri.len)?0:UAC_SKIP_BR_DST_F, &p_msg->instance, &p_msg->ruid, &p_msg->location_ua); + /* test if cancel was received meanwhile */ + if (t->flags & T_CANCELED) goto canceled; if (branch_ret>=0) added_branches |= 1<<branch_ret; else @@ -1744,6 +1743,8 @@ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , &path, proxy, si, p_msg->fwd_send_flags, proto, (dst_uri.len)?0:UAC_SKIP_BR_DST_F, &instance, &ruid, &location_ua); + /* test if cancel was received meanwhile */ + if (t->flags & T_CANCELED) goto canceled; /* pick some of the errors in case things go wrong; note that picking lowest error is just as good as any other algorithm which picks any other negative @@ -1817,6 +1818,17 @@ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , ser_error=0; /* clear branch send errors, we have overall success */ set_kr(REQ_FWDED); return 1; + +canceled: + DBG("t_forward_non_ack: no forwarding on a canceled transaction\n"); + /* reset processed branches */ + clear_branches(); + /* restore backup flags from initial env */ + setbflagsval(0, backup_bflags); + /* update message flags, if changed in branch route */ + t->uas.request->flags = p_msg->flags; + ser_error=E_CANCELED; + return -1; }