The write queue was always meant to not queue more than the
max_length messages but the implementation never rejected a
message.
Begin to log and enforce the queue size limit, add a testcase
to verify the code and initialize except_cb as part of a fix
for that new test case.
Real applications might now run into the queue limit and drop
messages where they just queued them before. It is unfortunate
but I still think it is good to implement the routine as it was
intended. We need to review osmo_wqueue_enqueue once more to
see that no msgb is leaked.
Change-Id: I1e6aef30f3e73d4bcf2967bc49f0783aa65395ae
If the FD is both readable and writable and the read callback closes the
connection (and frees the surrounding structure) we shouldn't call the
write callback (or check anything else in the read fd).
With this patch callback functions can return -EBADFD if they don't want
the FD to be handled any more.
This patch moves all GSM-specific definitions to include/osmocom/gsm.
Moreover, the headers in include/osmocore/ have been moved to
include/osmocom/core.
This has been proposed by Harald Welte and Sylvain Munaunt.
Tested with `make distcheck'.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
It is possible that the queue is cleared after the select
and before the callback for writable is called. Check if
the list is not empty brefore taking an item out of it.
* I'm doing a nonblocking connect and for this I need to select
on writable and the first thing I need to do is to check the
SOL_SOCKET SO_ERROR state. I realize this by setting a different
cb on the embedded bfd during setup and then go back to the real
implementation.
The write queue can be a dropin replacement for the bsc_fd. It
is featuring two callbacks. One for ready read and one for ready
write. Whenever there is a message in the queue the write_queue
will set the BSC_FD_WRITE flag and then call the write callback.
It will make sure to delete the msgb after the write function
has been called. This class is intended to be be used in the
osmocom, layer2, bsc_msc_ip, bsc_hack and other applications.
Holger Hans Peter Freyther
Harald Welte
Daniel Willmann
Sylvain Munaut