From 40b58a5d2b2acddc8ff616b4c0fbdc808e16a9da Mon Sep 17 00:00:00 2001
From: Mark Michelson <mmichelson@digium.com>
Date: Thu, 12 Nov 2015 11:17:51 -0600
Subject: [PATCH] res_pjsip distributor: Don't send 503 response to responses.
When the SIP threadpool is backed up with tasks, we send 503 responses
to ensure that we don't try to overload ourselves. The problem is that
we were not insuring that we were not trying to send a 503 to an
incoming SIP response.
This change makes it so that we only send the 503 on incoming requests.
Change-Id: Ie2b418d89c0e453cc6c2b5c7d543651c981e1404
---
res/res_pjsip/pjsip_distributor.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/res/res_pjsip/pjsip_distributor.c b/res/res_pjsip/pjsip_distributor.c
index 1d39e0fd28..c40f7f9edd 100644
--- a/res/res_pjsip/pjsip_distributor.c
+++ b/res/res_pjsip/pjsip_distributor.c
@@ -287,7 +287,9 @@ static pj_bool_t distributor(pjsip_rx_data *rdata)
* some sort of terrible condition and don't need to be adding more work to the threadpool.
* It's in our best interest to send back a 503 response and be done with it.
*/
- pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 503, NULL, NULL, NULL);
+ if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) {
+ pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 503, NULL, NULL, NULL);
+ }
ao2_cleanup(clone->endpt_info.mod_data[endpoint_mod.id]);
pjsip_rx_data_free_cloned(clone);
} else {
--
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