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Fix crash when answering after a transport error occurs.

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If a response to an initial incoming INVITE results in a transport error
the INVITE transaction is removed from the INVITE session. Any attempts
to answer the INVITE session after this results in a crash as it requires
the INVITE transaction to exist. This change explicitly locks the dialog
and checks to ensure that the INVITE transaction exists before answering.

(closes issue AST-1203)
Reported by: John Bigelow


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@397515 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2013-08-23 13:58:08 +00:00
parent d12c79f78f
commit b2a13e83dc
1 changed files with 8 additions and 2 deletions
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10
channels/chan_pjsip.c
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@@ -637,11 +637,17 @@ static struct ast_channel *chan_pjsip_new(struct ast_sip_session *session, int s
static int answer(void *data)
{
pj_status_t status;
pj_status_t status = PJ_SUCCESS;
pjsip_tx_data *packet;
struct ast_sip_session *session = data;
if ((status = pjsip_inv_answer(session->inv_session, 200, NULL, NULL, &packet)) == PJ_SUCCESS) {
pjsip_dlg_inc_lock(session->inv_session->dlg);
if (session->inv_session->invite_tsx) {
status = pjsip_inv_answer(session->inv_session, 200, NULL, NULL, &packet);
}
pjsip_dlg_dec_lock(session->inv_session->dlg);
if (status == PJ_SUCCESS && packet) {
ast_sip_session_send_response(session, packet);
}