Take into account that the data may not be already available in the
socket causing the `recvmsg()` / `recvmmsg()` calls to return `EAGAIN`
or `EWOULDBLOCK`.
Fixes: https://github.com/libuv/libuv/issues/3479
The maximum numbers receivable by the recvmmsg call is defined in
src/unix/udp.c as UV__MMSG_MAXWIDTH with the current value being 20.
Align the size of the receive buffer in the mmsg test to receive the
maximum number of UDP packets in the test.
Moving to new style test macros will make debugging easier in case
of test failure and improve redability. This commit will replace all
ASSERT macros matching the statement:
`ASSERT(identifier (== or !=) value);`
to:
`ASSERT_(NOT_)NULL(identifier);`
Refs: https://github.com/libuv/libuv/issues/2974
PR-URL: https://github.com/libuv/libuv/pull/3081
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Allows for determining if a buffer large enough for multiple dgrams
should be allocated in alloc_cb of uv_udp_recvstart, for example.
Contributes towards #2822.
PR-URL: https://github.com/libuv/libuv/pull/2830
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jameson Nash <vtjnash@gmail.com>
