evhttp_write_buffer() used by evhttp_send_reply_chunk() can take callback
executed when (part of) the buffer has been written. Using this callback to
schedule the next chunk avoids buffering large amounts of data in memory.
Basically tcp final handshake looks like this:
(C - client, S - server)
ACK[C] - FIN/ACK[S] - FIN/ACK[S] - ACK [C]
However there are servers, that didn't close connection like this,
while it is still _considered_ as valid, and using libevent http layer
we can do requests to such servers.
Modified handshake:
(C - client, S - server)
ACK[C] - RST/ACK[S] - RST/ACK[S]
And in this case we can't extract IP address from socket, because it is
already closed, and getpeername() will return: "transport endpoint is not connected".
So we need to store address that we are connecting to, after we know it,
and that is what this patch do.
I have reproduced it, however it have some extra packages.
(I will try to fix it)
https://github.com/azat/nfq-examples/blob/master/nfqnl_rst_fin.c
Currently an out-of-tree build will either write to the src dir or reuse
the existing regress.gen.[c,h]. But if building from a read-only git
tree (or if the git dir is cleaned), these files will not exist and the
build fails. So write the files to the build dir. If the system does
not have python, the regress.gen.[c,h] will be used from the src dir if
they exist.
The evhttp_send_reply method invokes evhttp_write_buffer with a
callback that may release the underlying request object and
bufferevent upon completion. This cleanup callback is invoked by the
underlying bufferevent's write callback. Improperly enabling write
events before referencing the bufferevent could lead to use after free
and memory corruption.
By default there is "0.0.0.0", and this address will work only from
the same machine, and besides there is no need in uri_root in base_url,
because it will be added automatically by browser.
In event_process_active_single_queue, EVLIST_INIT must be set on any
event that uses one of the event-only closures, and so "ev" will be
set in those cases. But coverity's worried here (CIDs numerous). So
instead, just add the assertions that should make it happy.
