Module: sip-router Branch: admorten/sca Commit: b906a1e4c3d36a8dd007dabd1934c7a625ffdd6a URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=b906a1e4...

Author: Andrew Mortensen admorten@isc.upenn.edu Committer: Andrew Mortensen admorten@isc.upenn.edu Date: Thu Apr 11 22:34:10 2013 -0400

modules/sca: clear appearance on t_reply with error after receiving 18x.

- Receiving a 18x provisional reply triggers line-seize subscription termination. Releasing the seized appearance while processing a t_reply with an error status *after* getting a 18x would fail because sca_subscription_terminate could not find a matching line-seize subscription. In that case, look up appearance by tags and release it.

---

modules/sca/sca_call_info.c | 33 ++++++++++++++++++++++++++++----- modules/sca/sca_subscribe.c | 8 +++++++- 2 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/modules/sca/sca_call_info.c b/modules/sca/sca_call_info.c index 8f681fd..6766553 100644 --- a/modules/sca/sca_call_info.c +++ b/modules/sca/sca_call_info.c @@ -877,8 +877,10 @@ sca_call_info_local_error_reply_handler( sip_msg_t *msg, int status ) { struct to_body *from; struct to_body *to; + sca_appearance *app; str aor = STR_NULL; str contact_uri = STR_NULL; + int rc;

if ( sca_get_msg_from_header( msg, &from ) < 0 ) { LM_ERR( "sca_call_info_sl_reply_cb: failed to get From header from " @@ -909,15 +911,36 @@ sca_call_info_local_error_reply_handler( sip_msg_t *msg, int status ) return; }

- if ( sca_subscription_terminate( sca, &aor, + /* + * two typical cases to handle. in the first case, we haven't dropped + * our line-seize subscription because a transaction exists but we + * never got a provisional 18x response before calling t_reply. calling + * sca_subscription_terminate will drop the subscription and release + * the seized appearance. + * + * in the second case, we got a 18x response and terminated the + * line-seize subscription, so we need to look up the appearance by + * tags in order to release it. + */ + rc = sca_subscription_terminate( sca, &aor, SCA_EVENT_TYPE_LINE_SEIZE, &contact_uri, SCA_SUBSCRIPTION_STATE_TERMINATED_NORESOURCE, - SCA_SUBSCRIPTION_TERMINATE_OPT_DEFAULT ) < 0 ) { + SCA_SUBSCRIPTION_TERMINATE_OPT_DEFAULT ); + if ( rc < 0 ) { LM_ERR( "sca_call_info_sl_reply_cb: failed to terminate " "line-seize subscription for %.*s", STR_FMT( &contact_uri )); - } else if ( sca_notify_call_info_subscribers( sca, &aor ) < 0 ) { - LM_ERR( "Failed to call-info NOTIFY %.*s subscribers", - STR_FMT( &aor )); + } else if ( rc == 0 ) { + /* no line-seize subscription found */ + app = sca_appearance_unlink_by_tags( sca, &aor, + &msg->callid->body, &from->tag_value, &to->tag_value ); + if ( app ) { + sca_appearance_free( app ); + if ( sca_notify_call_info_subscribers( sca, &aor ) < 0 ) { + LM_ERR( "sca_call_info_local_error_reply: failed to send " + "call-info NOTIFY to %.*s subscribers", + STR_FMT( &aor )); + } + } } }

diff --git a/modules/sca/sca_subscribe.c b/modules/sca/sca_subscribe.c index f30386a..d62e7bf 100644 --- a/modules/sca/sca_subscribe.c +++ b/modules/sca/sca_subscribe.c @@ -1350,6 +1350,12 @@ sca_subscription_reply( sca_mod *scam, int status_code, char *status_msg, return( sca_reply( scam, status_code, status_msg, &extra_headers, msg )); }

+/* + * return values: + * -1: error + * 0: no subscription found to terminate + * 1: subscription terminated + */ int sca_subscription_terminate( sca_mod *scam, str *aor, int event, str *subscriber, int termination_state, int opts ) @@ -1395,7 +1401,7 @@ sca_subscription_terminate( sca_mod *scam, str *aor, int event, if ( ent == NULL ) { LM_DBG( "No %s subscription for %.*s", event_name, STR_FMT( subscriber )); - return( 1 ); + return( 0 ); }

sub = (sca_subscription *)ent->value;