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This compartmentalises it a little more, reducing the spread of
state-changing code from three files down to one.

The key change is the switch from using two GSLists of NiceSockets and
GSources in Component, to using a single GSList of a struct {
NiceSocket, GSource }. This is possible because there is at most one
GSource per NiceSocket. This change reduces memory overhead (from the
GSList structures) slightly, and makes the relationship between sockets
and sources much clearer.

Move all functionality which is unrelated to the GSource into
_nice_agent_recv().

This is emitted when one or more streams are removed from the agent
due to a call to nice_agent_remove_stream().

A g_usleep() was introduced in commit
e22ecb19 to fix a potential race where
the non-main threads would finish all their work before the error_loop
was started, leaving the error_loop to run for 30s then abort the test.

A better fix, instead of doing a racy sleep, is to have the non-main
threads spin until the error_loop is running. GLib takes care of all the
locking for us, and since we don’t care about efficiency for test cases,
spinning is fine (the wait is also going to be quite short).

Add various compiler warnings to the different levels of
--enable-compile-warnings. No particular scheme has been used to assign
different warnings to different levels, other than that more critical
ones are typically enabled at lower levels upwards.

All code in libnice except the tests currently compiles with
--enable-compile-warnings=error.

This appeases GCC’s -Wswitch-enum warning, and makes it more obvious
that those enum cases have been explicitly considered, rather than just
forgotten about.

This introduces no functional changes.

This appeases GCC’s -Wswitch-enum warning, and makes it more obvious
that those enum cases have been explicitly considered, rather than just
forgotten about.

This introduces no functional changes.

This appeases GCC’s -Wswitch-enum warning, and makes it more obvious
that those enum cases have been explicitly considered, rather than just
forgotten about.

This introduces no functional changes.

GCC warns about this. Might as well prevent the warning.

This appeases GCC’s -Wswitch-enum warning, and makes it more obvious
that those enum cases have been explicitly considered, rather than just
forgotten about.

This introduces no functional changes.

Casting from one struct sockaddr type to another breaks C’s strict
aliasing rules (variables of different types cannot alias). Fix this
cleanly by using unions of struct sockaddrs to convert between the
types (i.e. type-punning).

I wish sockaddr didn’t have to be this painful.

See:
http://gcc.gnu.org/onlinedocs/gcc-4.4.1/gcc/Optimize-Options.html#Type_002dpunning

Syncs with libjingle SVN rev 77

This can only be called after we received a packet, where we already
adjust the clock

Should improve receive performance a bit.

Syncs with libjingle SVN rev 76

Syncs with libjingle SVN rev 56

Also document that fact.

Add to the documentation to note that it can be called several times to
set details for several relay servers during discovery.

Do not unconditionally enable -Werror, since that breaks the build for
people who have stricter compilation warnings enabled.

Instead, add an --enable-compile-warnings configure flag which enables
-Werror when passed as --enable-compile-warnings=error. This mimics the
flag in gnome-common, for consistency. But we enable errors by default
on non-released versions.

This shuts a compiler warning up and allows for format string checking
of debug messages.

This fix may not be entirely cross-platform, and I have been unable to
test whether it is; making it cross-platform is made more difficult by
the fact that the STUN code doesn’t use GLib.

The PRIuPTR macro was defined in POSIX:2004, and later in C99.
http://pubs.opengroup.org/onlinepubs/009696799/basedefs/inttypes.h.html

It gets automatically generated by autotools, so just gets in the way if
checked into git.

Older compilers don't understand all of the flags

It was trying to send queued messages to the final destination instead
of going through the TURN server

div() has an aggregate return, which GCC doesn’t like, although this
seems like a pretty pointless warning because div_t is the same size as
a pointer on 64-bit platforms (probably) and hardly going to cause
performance problems by passing it by value.

Anyway, it seems easier to simplify the code by using explicit / and %
operators inline, than it does to add pragmas and shut the warning up.

If stun_message_append_bytes() is called through
stun_message_append_flag(), data will be NULL and len will be 0. This
will result in a memcpy(ptr, NULL, 0) call. This probably won’t do any
harm (since any reasonable memcpy() implementation will immediately
return if (len == 0)), but the standard allows for memcpy() to explode
if (data == NULL), regardless of the value of len.

In order to be conformant, and to shut up the scan-build static analysis
warning about it, only do the memcpy() if (len > 0).