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-rw-r--r--main/channel.c30
1 files changed, 23 insertions, 7 deletions
diff --git a/main/channel.c b/main/channel.c
index a83c3c94d..f94afd9cd 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -1696,15 +1696,31 @@ int __ast_answer(struct ast_channel *chan, unsigned int delay)
switch (chan->_state) {
case AST_STATE_RINGING:
case AST_STATE_RING:
- if (chan->tech->answer)
- res = chan->tech->answer(chan);
- ast_setstate(chan, AST_STATE_UP);
- ast_cdr_answer(chan->cdr);
- ast_channel_unlock(chan);
- if (delay)
+ if (delay) {
+ int needanswer = (chan->tech->answer != NULL);
+
+ ast_setstate(chan, AST_STATE_UP);
+ ast_cdr_answer(chan->cdr);
+ ast_channel_unlock(chan);
ast_safe_sleep(chan, delay);
+ /* don't tell the channel it has been answered until *after* the delay,
+ so that the media path will be in place and usable when it wants to
+ send media
+ */
+ if (needanswer) {
+ ast_channel_lock(chan);
+ res = chan->tech->answer(chan);
+ ast_channel_unlock(chan);
+ }
+ } else {
+ if (chan->tech->answer) {
+ res = chan->tech->answer(chan);
+ }
+ ast_setstate(chan, AST_STATE_UP);
+ ast_cdr_answer(chan->cdr);
+ ast_channel_unlock(chan);
+ }
return res;
- break;
case AST_STATE_UP:
ast_cdr_answer(chan->cdr);
break;