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chan_pjsip: Fix a sticking channel lock caused by channel masquerades

Browse Source 
(closes issue ASTERISK-22936)
Reported by: Jonathan Rose
Review: https://reviewboard.asterisk.org/r/3042/
........

Merged revisions 403587 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@403588 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Jonathan Rose
2013-12-09 22:59:14 +00:00
parent f6e92c35df
commit 905a7de52b
1 changed files with 29 additions and 6 deletions
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35
channels/chan_pjsip.c
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@@ -841,14 +841,28 @@ static int chan_pjsip_write(struct ast_channel *ast, struct ast_frame *frame)
struct fixup_data {
struct ast_sip_session *session;
struct ast_channel *chan;
struct ast_channel *oldchan;
};
static void fixup_data_destroy(struct fixup_data *fix_data)
{
ao2_cleanup(fix_data->session);
ast_channel_cleanup(fix_data->chan);
ast_channel_cleanup(fix_data->oldchan);
ast_free(fix_data);
}
static int fixup(void *data)
{
struct fixup_data *fix_data = data;
struct ast_sip_channel_pvt *channel = ast_channel_tech_pvt(fix_data->chan);
struct chan_pjsip_pvt *pvt = channel->pvt;
if (channel->session->channel != fix_data->oldchan) {
fixup_data_destroy(fix_data);
return -1;
}
channel->session->channel = fix_data->chan;
if (pvt->media[SIP_MEDIA_AUDIO] && pvt->media[SIP_MEDIA_AUDIO]->rtp) {
ast_rtp_instance_set_channel_id(pvt->media[SIP_MEDIA_AUDIO]->rtp, ast_channel_uniqueid(fix_data->chan));
@@ -857,6 +871,8 @@ static int fixup(void *data)
ast_rtp_instance_set_channel_id(pvt->media[SIP_MEDIA_VIDEO]->rtp, ast_channel_uniqueid(fix_data->chan));
}
fixup_data_destroy(fix_data);
return 0;
}
@@ -864,16 +880,23 @@ static int fixup(void *data)
static int chan_pjsip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
struct ast_sip_channel_pvt *channel = ast_channel_tech_pvt(newchan);
struct fixup_data fix_data;
struct fixup_data *fix_data = ast_calloc(1, sizeof(*fix_data));
fix_data.session = channel->session;
fix_data.chan = newchan;
if (channel->session->channel != oldchan) {
if (!fix_data) {
return -1;
}
if (ast_sip_push_task_synchronous(channel->session->serializer, fixup, &fix_data)) {
fix_data->session = channel->session;
ao2_ref(fix_data->session, +1);
fix_data->chan = newchan;
ast_channel_ref(fix_data->chan);
fix_data->oldchan = oldchan;
ast_channel_ref(fix_data->oldchan);
if (ast_sip_push_task(channel->session->serializer, fixup, fix_data)) {
fixup_data_destroy(fix_data);
ast_log(LOG_WARNING, "Unable to perform channel fixup\n");
return -1;
}