Prevent the situation where errno is set by function A, then function B
is called (which is typically _(), but could be anything else) and it
overwrites errno, then errno is checked by the caller.
errno is a horrific API, and we need to be careful to save its value as
soon as a function call (which might set it) returns. i.e. Follow the
pattern:
int errsv, ret;
ret = some_call_which_might_set_errno ();
errsv = errno;
if (ret < 0)
puts (strerror (errsv));
This patch implements that pattern throughout GLib. There might be a few
places in the test code which still use errno directly. They should be
ported as necessary. It doesn’t modify all the call sites like this:
if (some_call_which_might_set_errno () && errno == ESOMETHING)
since the refactoring involved is probably more harmful than beneficial
there. It does, however, refactor other call sites regardless of whether
they were originally buggy.
https://bugzilla.gnome.org/show_bug.cgi?id=785577
There are a few places where commit 18a33f72 replaced valid (nullable)
(optional) annotations with just (optional). That has a different
meaning.
(nullable) (optional) can only be applied to gpointer* parameters, and
means that both the gpointer* and returned gpointer can be NULL. i.e.
The caller can pass in NULL to ignore the return value; and the returned
value can be NULL.
(optional) can be applied to anything* parameters, and means that the
anything* can be NULL. i.e. The caller can pass in NULL to ignore the
return value. The return value cannot be NULL.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
socket->priv->timeout is only a guint, and the multiplication is
performed before it’s widened to gint64 to be stored in start_time
(thanks, C). This means any timeout of 50 days or more would overflow.
Fixing this bug makes me feel a real sense of self-worth.
Coverity ID: 1159478
Signed-off-by: Philip Withnall <withnall@endlessm.com>
WSAWaitForMultipleEvents() only returns for one of the waiting threads, and
that one might not even be the one waiting for the condition that changed. As
such, only let a single thread wait on the event and use a GCond for all other
threads.
With this it is possible to e.g. have an UDP socket that is written to from
one thread and read from in another thread on Win32 too. On POSIX systems this
was working before already.
https://bugzilla.gnome.org/show_bug.cgi?id=762283
If we have an input parameter (or return value) we need to use (nullable).
However, if it is an (inout) or (out) parameter, (optional) is sufficient.
It looks like (nullable) could be used for everything according to the
Annotation documentation, but (optional) is more specific.
If g_socket_receive_message_with_timeout() is called with messages ==
NULL set the msg_control buffer to empty to not request the control
messages from recvmsg() at all.
This completely disables the control message processing and reduces
overhead, which might be critical at high packet rate.
https://bugzilla.gnome.org/show_bug.cgi?id=774520
GDatagramBased is an interface abstracting datagram-based communications
in the style of the Berkeley sockets API. It may be contrasted to (for
example) GIOStream, which supports only streaming I/O.
GDatagramBased allows socket-like communications to be done through any
object, not just a concrete GSocket (which wraps socket()).
This adds the GDatagramBased interface, and implements it in GSocket.
https://bugzilla.gnome.org/show_bug.cgi?id=697907
Commit a0cefc2217 introduced an unresolved
symbol, g_socket_send_message_with_timeout(), on win32. Windows
unfortunately isn’t clever enough to fill in the gaps and magic up the
implementation of that function from nowhere, so we had better do it
ourselves.
Factor the blocking behaviour out of g_socket_send_message() into a new
internal g_socket_send_message_with_timeout().
https://bugzilla.gnome.org/show_bug.cgi?id=756054
5d68947 factored out resuable items, but some of these are only for
*NIX builds, which will break the build on Windows. Fix this by
building these portions only when !G_OS_WIN32.
https://bugzilla.gnome.org/show_bug.cgi?id=756053
The value of g_socket_is_connected() gets stuck high if the GSocket is
shut down in two steps:
g_socket_shutdown (socket, TRUE, FALSE, NULL);
g_socket_shutdown (socket, FALSE, TRUE, NULL);
rather than one:
g_socket_shutdown (socket, TRUE, TRUE, NULL);
Fix that by tracking the connected status for the read half and the
write half of the connection separately.
https://bugzilla.gnome.org/show_bug.cgi?id=697907
If an error in the underlying sendmmsg() syscall occurs after
successfully sending one or more messages, g_socket_send_messages()
should return the number of messages successfully sent, rather than an
error. This mirrors the documented sendmmsg() behaviour.
This is a slight behaviour change for g_socket_send_messages(), but as
it relaxes the error reporting (reporting errors in fewer situations
than before), it should not cause problems.
https://bugzilla.gnome.org/show_bug.cgi?id=751924
Add support for receiving multiple messages with a single system call,
using recvmmsg() if available. Otherwise, fall back to looping over
g_socket_receive_message().
This adds new API, g_socket_receive_messages(), and corresponding unit
tests.
https://bugzilla.gnome.org/show_bug.cgi?id=751924
In order to support per-operation timeouts on new API like
g_socket_receive_messages(), the internal GSocket API should use
timeouts rather than boolean blocking parameters.
(timeout == 0) === (blocking == FALSE)
(timeout == -1) === (blocking == TRUE)
(timeout > 0) === new behaviour
https://bugzilla.gnome.org/show_bug.cgi?id=751924
The API design here is a bit awkward — the in/out flags argument should
actually have been an in flags argument and an out msg_flags argument.
Clarify that a bit in the documentation.
https://bugzilla.gnome.org/show_bug.cgi?id=751924
If @error is NULL then we don't even need to evaluate the remaining
arguments. And if errno is EWOULDBLOCK, then no one should see the
error message anyway, so don't bother g_strdup_printf'ing up a pretty
one.
https://bugzilla.gnome.org/show_bug.cgi?id=752769
This code was out of date with current coding practices.
Nowadays it's common to receive file descriptors over environment
variables from other processes like systemd. The unit files that
control these file descriptors are configurable by sysadmins.
It is not (necessarily) a programmer error when g_socket_details_from_fd()
is called with a file descriptor that is not a socket. It can also
be a system and/or configuration error.
https://bugzilla.gnome.org/show_bug.cgi?id=746339
For performance reasons we should always try to send or
receive our messages first and only wait for more space
or data to become available if we get an EAGAIN (and
are in blocking mode).
https://bugzilla.gnome.org/show_bug.cgi?id=751122
Currently, the Windows code use Winsock2-specific APIs to try to emulate
calls such as inet_pton(), inet_ntop() and if_nametoindex(), which may not
do the job all the time. On Vista and later, Winsock2 does provide a
proper implementation for these functions, so we can use them if they exist
on the system, by querying for them during g_networking_init(). Otherwise,
we continue to use the original code path for these, in the case of XP and
Server 2003.
This enables many of the network-address tests to pass on Windows as a
result, when the native Winsock2 implementations can be used.
https://bugzilla.gnome.org/show_bug.cgi?id=730352
When implementing blocking operations on top of
nonblocking sockets we should always first try to
perform the operation and then if needed handle
EAGAIN and wait with g_socket_wait_condition.
This is an optimization since we avoid calling
wait condition when it is not needed, but most
importantly this fixes hangs on win32 where some
events (in particular FD_WRITE) are only emitted
after the operation fails with EWOULDBLOCK.
https://bugzilla.gnome.org/show_bug.cgi?id=732439https://bugzilla.gnome.org/show_bug.cgi?id=741707
Allows sending of multiple messages (packets, datagrams)
in one go using sendmmsg(), thus drastically reducing the
number of syscalls when sending out a lot of data, or when
sending out the same data to multiple recipients.
https://bugzilla.gnome.org/show_bug.cgi?id=719646
This is a best-effort approach to preventing SIGPIPE emissions on Darwin
and iOS, where they continue to be intercepted by the Xcode debugger
even if SIG_IGN prevents them crashing the program.
This is similar to the existing code which sets MSG_NOSIGNAL on all
send() calls. MSG_NOSIGNAL doesn't exist on Darwin though.
Based on a patch from Philip Withnall.
https://bugzilla.gnome.org/show_bug.cgi?id=728730
This is quite important, as it means you can safely let the GSocket drop
out of scope while maintaining a reference to the GSource, and the
socket will remain open. That means fewer closure structures, simpler
code, and fewer allocations.
https://bugzilla.gnome.org/show_bug.cgi?id=732081
Rather than having special code in gsocket.c, handle Winsock errors
along with other Win32 errors in gioerror.c
Also, reference g_win32_error_message() from the
g_io_error_from_win32_error() docs, and update the
g_win32_error_message() docs to clarify that it works with Winsock
error codes too.
There is no longer any code left in the check/prepare functions on UNIX,
so put %NULL in the GSourceFuncs vtable.
This also allows us to simplify some logic.
https://bugzilla.gnome.org/show_bug.cgi?id=724707
We are reusing the GPollFD.revents field of the source to store a
temporary value. Use a local variable for that instead.
This is a refactor to make the next commit easier to understand.
https://bugzilla.gnome.org/show_bug.cgi?id=724707
Now that GCancellable's GSource is based on _set_ready_time() instead of
an fd, we should use it as a child source, instead of forcing the
creation of the fd and adding it as a poll.
https://bugzilla.gnome.org/show_bug.cgi?id=724707
After getting an EINTR, g_socket_condition_timed_wait() has to adjust
its timeout, but it was trying to convert from nanoseconds to
microseconds by multiplying by 1000 rather than dividing... Oops.
https://bugzilla.gnome.org/show_bug.cgi?id=724239
Windows needs a special inefficient hack to implement
g_socket_get_available() correctly for UDP sockets, but that hack
isn't needed for TCP, and in fact, might give the wrong answer in that
case. Fix it to only use the hack with UDP.
Also, fix that case to handle non-blocking sockets as well.
And add a test case for g_socket_get_available() with TCP.
https://bugzilla.gnome.org/show_bug.cgi?id=723422
Since all element markup is now gone from the doc comments,
we can turn off the gtk-doc sgml mode, which means that from
now on, docbook markup is no longer allowed in doc comments.
To make this possible, we have to replace all remaining
entities in doc comments by their replacement text, & -> &
and so on.
