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Russell Bryant 5f1f3ed473 Merge changes from team/russell/iax2_find_callno and iax2_find_callno_1.4 ... These changes address a critical performance issue introduced in the latest release. The fix for the latest security issue included a change that made Asterisk randomly choose call numbers to make them more difficult to guess by attackers. However, due to some inefficient (this is by far, an understatement) code, when Asterisk chose high call numbers, chan_iax2 became unusable after just a small number of calls. On a small embedded platform, it would not be able to handle a single call. On my Intel Core 2 Duo @ 2.33 GHz, I couldn't run more than about 16 IAX2 channels. Ouch. These changes address some performance issues of the find_callno() function that have bothered me for a very long time. On every incoming media frame, it iterated through every possible call number trying to find a matching active call. This involved a mutex lock and unlock for each call number checked. So, if the random call number chosen was 20000, then every media frame would cause 20000 locks and unlocks. Previously, this problem was not as obvious since Asterisk always chose the lowest call number it could. A second container for IAX2 pvt structs has been added. It is an astobj2 hash table. When we know the remote side's call number, the pvt goes into the hash table with a hash value of the remote side's call number. Then, lookups for incoming media frames are a very fast hash lookup instead of an absolutely insane array traversal. In a quick test, I was able to get more than 3600% more IAX2 channels on my machine with these changes. git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@114891 65c4cc65-6c06-0410-ace0-fbb531ad65f3		18 years ago
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h323	Send CallerID Name in setup message.	19 years ago
misdn	fix various other problems found by gcc 4.3	19 years ago
DialTone.h	remove extraneous svn:executable properties	21 years ago
Makefile	get chan_vpb to build properly in dev mode	19 years ago
answer.h	remove extraneous svn:executable properties	21 years ago
chan_agent.c	Ensure that we don't ast_strdupa(NULL)	18 years ago
chan_alsa.c	Add a control frame to indicate the source of media has changed. Depending on the underlying technology it may need to change some things.	19 years ago
chan_features.c	Disable chan_features by default in menuselect	19 years ago
chan_gtalk.c	When modules are embedded, they take on a different name, without the ".so"	18 years ago
chan_h323.c	The call_token on the pvt can occasionally be NULL, causing a crash.	18 years ago
chan_iax2.c	Merge changes from team/russell/iax2_find_callno and iax2_find_callno_1.4	18 years ago
chan_local.c	Resolve a deadlock in chan_local by releasing the channel lock	18 years ago
chan_mgcp.c	Add a control frame to indicate the source of media has changed. Depending on the underlying technology it may need to change some things.	19 years ago
chan_misdn.c	fix various other problems found by gcc 4.3	19 years ago
chan_nbs.c	This is a big improvement over the current CDR fixes. It may still need refinement, but this won't have as many folks bothered.	20 years ago
chan_oss.c	Fix a channel name issue. chan_oss registers the "Console" channel type,	19 years ago
chan_phone.c	Add a control frame to indicate the source of media has changed. Depending on the underlying technology it may need to change some things.	19 years ago
chan_sip.c	Don't crash on bad SIP replys.	18 years ago
chan_skinny.c	Add a little more that is required for previously added devices.	18 years ago
chan_vpb.cc	Backport revisions for latest vpb drivers to 1.4	18 years ago
chan_zap.c	Clearing up error messages so they make a bit more sense. Also removing a redundant error	18 years ago
gentone-ulaw.c	remove extraneous svn:executable properties	21 years ago
gentone.c	remove extraneous svn:executable properties	21 years ago
iax2-parser.c	Merged revisions 75444 via svnmerge from	19 years ago
iax2-parser.h	Merged revisions 75444 via svnmerge from	19 years ago
iax2-provision.c	Put in missing \ns on the end of ast_logs (issue #7936 reported by wojtekka)	20 years ago
iax2-provision.h	useless 'extern' and trailing whitespace removal	21 years ago
iax2.h	use the ARRAY_LEN macro for indexing through the iaxs/iaxsl arrays so that the size of the arrays can be adjusted in one place, and change the size of the arrays from 32768 calls to 2048 calls when LOW_MEMORY is defined	18 years ago
misdn_config.c	Initialize an array to 0s if config option not specified.	19 years ago
ring10.h	remove extraneous svn:executable properties	21 years ago