From 229b95d253e7e3bf51cd431f021cff7993655dc7 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Thu, 27 Aug 2015 14:26:09 -0300
Subject: [PATCH] res_pjsip_session: Don't invoke session supplements twice for
BYE requests.
When a BYE request is received the PJSIP invite session implementation
creates and sends a 200 OK response before we are aware of it. This
causes the INVITE session state callback to be called into and ultimately
the session supplements run on the BYE request. Once this response has
been sent the normal transaction state callback is invoked which
invokes the session supplements on the BYE request again. This can
be problematic in particular with res_pjsip_rfc3326 as it may
attempt to update the hangup cause code on the channel while it is
in the process of being hung up.
This change makes it so the session supplements are only invoked
once by the INVITE session state callback.
ASTERISK-25318 #close
Change-Id: I69c17df55ccbb61ef779ac38cc8c6b411376c19a
---
res/res_pjsip_session.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/res/res_pjsip_session.c b/res/res_pjsip_session.c
index a3c0dfc7e6..801746459b 100644
--- a/res/res_pjsip_session.c
+++ b/res/res_pjsip_session.c
@@ -2422,8 +2422,16 @@ static void session_inv_on_tsx_state_changed(pjsip_inv_session *inv, pjsip_trans
break;
case PJSIP_EVENT_RX_MSG:
cb = ast_sip_mod_data_get(tsx->mod_data, session_module.id, MOD_DATA_ON_RESPONSE);
- handle_incoming(session, e->body.tsx_state.src.rdata, e->type,
- AST_SIP_SESSION_AFTER_MEDIA);
+ /* As the PJSIP invite session implementation responds with a 200 OK before we have a
+ * chance to be invoked session supplements for BYE requests actually end up executing
+ * in the invite session state callback as well. To prevent session supplements from
+ * running on the BYE request again we explicitly squash invocation of them here.
+ */
+ if ((e->body.tsx_state.src.rdata->msg_info.msg->type != PJSIP_REQUEST_MSG) ||
+ (tsx->method.id != PJSIP_BYE_METHOD)) {
+ handle_incoming(session, e->body.tsx_state.src.rdata, e->type,
+ AST_SIP_SESSION_AFTER_MEDIA);
+ }
if (tsx->method.id == PJSIP_INVITE_METHOD) {
if (tsx->role == PJSIP_ROLE_UAC) {
if (tsx->state == PJSIP_TSX_STATE_COMPLETED) {
--
GitLab