int ast_answer(struct ast_channel *chan)
{
int res = 0;
+
ast_channel_lock(chan);
+
/* You can't answer an outbound call */
if (ast_test_flag(chan, AST_FLAG_OUTGOING)) {
ast_channel_unlock(chan);
return 0;
}
+
/* Stop if we're a zombie or need a soft hangup */
if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) {
ast_channel_unlock(chan);
return -1;
}
+
switch(chan->_state) {
case AST_STATE_RINGING:
case AST_STATE_RING:
res = chan->tech->answer(chan);
ast_setstate(chan, AST_STATE_UP);
ast_cdr_answer(chan->cdr);
+ ast_safe_sleep(chan, 500);
break;
case AST_STATE_UP:
ast_cdr_answer(chan->cdr);
default:
break;
}
+
ast_channel_unlock(chan);
+
return res;
}