diff options
author | Russell Bryant <russell@russellbryant.com> | 2011-01-24 20:57:28 +0000 |
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committer | Russell Bryant <russell@russellbryant.com> | 2011-01-24 20:57:28 +0000 |
commit | 092134399c14b6256e1bc377951e16061dfd2331 (patch) | |
tree | 83a1ae525750fbffa01473c8475eb61d650daee2 /main/channel.c | |
parent | b6bb13b498f1f9c8290e840aaa441e2fbed101fc (diff) |
Merged revisions 303549 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8
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r303549 | russell | 2011-01-24 14:51:37 -0600 (Mon, 24 Jan 2011) | 45 lines
Merged revisions 303548 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.6.2
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r303548 | russell | 2011-01-24 14:49:53 -0600 (Mon, 24 Jan 2011) | 38 lines
Merged revisions 303546 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4
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r303546 | russell | 2011-01-24 14:32:21 -0600 (Mon, 24 Jan 2011) | 31 lines
Fix channel redirect out of MeetMe() and other issues with channel softhangup.
Mantis issue #18585 reports that a channel redirect out of MeetMe() stopped
working properly. This issue includes a patch that resolves the issue by
removing a call to ast_check_hangup() from app_meetme.c. I left that in my
patch, as it doesn't need to be there. However, the rest of the patch fixes
this problem with or without the change to app_meetme.
The key difference between what happens before and after this patch is the
effect of the END_OF_Q control frame. After END_OF_Q is hit in ast_read(),
ast_read() will return NULL. With the ast_check_hangup() removed, app_meetme
sees this which causes it to exit as intended. Checking ast_check_hangup()
caused app_meetme to exit earlier in the process, and the target of the
redirect saw the condition where ast_read() returned NULL.
Removing ast_check_hangup() works around the issue in app_meetme, but doesn't
solve the issue if another application did the same thing. There are also
other edge cases where if an application finishes at the same time that a
redirect happens, the target of the redirect will think that the channel hung
up. So, I made some changes in pbx.c to resolve it at a deeper level. There
are already places that unset the SOFTHANGUP_ASYNCGOTO flag in an attempt to
abort the hangup process. My patch extends this to remove the END_OF_Q frame
from the channel's read queue, making the "abort hangup" more complete. This
same technique was used in every place where a softhangup flag was cleared.
(closes issue #18585)
Reported by: oej
Tested by: oej, wedhorn, russell
Review: https://reviewboard.asterisk.org/r/1082/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@303551 65c4cc65-6c06-0410-ace0-fbb531ad65f3
Diffstat (limited to 'main/channel.c')
-rw-r--r-- | main/channel.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/main/channel.c b/main/channel.c index 87a192d03..06ee8bb85 100644 --- a/main/channel.c +++ b/main/channel.c @@ -2600,6 +2600,31 @@ void ast_poll_channel_del(struct ast_channel *chan0, struct ast_channel *chan1) return; } +void ast_channel_clear_softhangup(struct ast_channel *chan, int flag) +{ + ast_channel_lock(chan); + + chan->_softhangup &= ~flag; + + if (!chan->_softhangup) { + struct ast_frame *fr; + + /* If we have completely cleared the softhangup flag, + * then we need to fully abort the hangup process. This requires + * pulling the END_OF_Q frame out of the channel frame queue if it + * still happens to be there. */ + + fr = AST_LIST_LAST(&chan->readq); + if (fr && fr->frametype == AST_FRAME_CONTROL && + fr->subclass.integer == AST_CONTROL_END_OF_Q) { + AST_LIST_REMOVE(&chan->readq, fr, frame_list); + ast_frfree(fr); + } + } + + ast_channel_unlock(chan); +} + /*! \brief Softly hangup a channel, don't lock */ int ast_softhangup_nolock(struct ast_channel *chan, int cause) { @@ -6807,10 +6832,10 @@ static enum ast_bridge_result ast_generic_bridge(struct ast_channel *c0, struct ast_jb_get_and_deliver(c0, c1); if ((c0->_softhangup | c1->_softhangup) & AST_SOFTHANGUP_UNBRIDGE) {/* Bit operators are intentional. */ if (c0->_softhangup & AST_SOFTHANGUP_UNBRIDGE) { - c0->_softhangup &= ~AST_SOFTHANGUP_UNBRIDGE; + ast_channel_clear_softhangup(c0, AST_SOFTHANGUP_UNBRIDGE); } if (c1->_softhangup & AST_SOFTHANGUP_UNBRIDGE) { - c1->_softhangup &= ~AST_SOFTHANGUP_UNBRIDGE; + ast_channel_clear_softhangup(c1, AST_SOFTHANGUP_UNBRIDGE); } c0->_bridge = c1; c1->_bridge = c0; @@ -7151,10 +7176,10 @@ enum ast_bridge_result ast_channel_bridge(struct ast_channel *c0, struct ast_cha if ((c0->_softhangup | c1->_softhangup) & AST_SOFTHANGUP_UNBRIDGE) {/* Bit operators are intentional. */ if (c0->_softhangup & AST_SOFTHANGUP_UNBRIDGE) { - c0->_softhangup &= ~AST_SOFTHANGUP_UNBRIDGE; + ast_channel_clear_softhangup(c0, AST_SOFTHANGUP_UNBRIDGE); } if (c1->_softhangup & AST_SOFTHANGUP_UNBRIDGE) { - c1->_softhangup &= ~AST_SOFTHANGUP_UNBRIDGE; + ast_channel_clear_softhangup(c1, AST_SOFTHANGUP_UNBRIDGE); } c0->_bridge = c1; c1->_bridge = c0; |