Module: sip-router Branch: master Commit: a8d50919bd614b704f3a4e08ff90d844b2c29829 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=a8d5091… Author: Daniel-Constantin Mierla <miconda(a)gmail.com> Committer: Daniel-Constantin Mierla <miconda(a)gmail.com> Date: Thu Oct 30 11:41:41 2014 +0100 tm: safety catch inside t_check_trans() when already in a tm routing block - transaction is known and some of these routing blocks are inside tm lock, which can result in deadlock if not tested - reported by Andrew Pogrebennyk, FS#482 --- modules/tm/tm.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/modules/tm/tm.c b/modules/tm/tm.c index f3568c1..d437119 100644 --- a/modules/tm/tm.c +++ b/modules/tm/tm.c @@ -2140,6 +2140,13 @@ int t_check_trans(struct sip_msg* msg) int branch; int ret; + /* already processing a T */ + if(get_route_type()==FAILURE_ROUTE + || get_route_type()==BRANCH_ROUTE + || get_route_type()==TM_ONREPLY_ROUTE) { + return 1; + } + if (msg->first_line.type==SIP_REPLY) { branch = 0; ret = (t_check_msg( msg , &branch)==1) ? 1 : -1; @@ -2171,7 +2178,7 @@ int t_check_trans(struct sip_msg* msg) } /* no need for UNREF(t); set_t(0) - the end-of-script t_unref callback will take care of them */ - return 0; /* return from the script */ + return 0; /* exit from the script */ } /* not found or error */ }