The various protocols were made static since there was no point in
exporting them in the past. Nowadays with QUIC relying on UDP we'll
significantly benefit from UDP being exported and more generally from
being able to declare some functions as being the same as other
protocols'.
In an ideal world it should not be these protocols which should be
exported, but the intermediary levels:
- socket layer (sock.c only right now), already exported as functions
but nothing structured at the moment ;
- family layer (sock_inet, sock_unix, sockpair etc): already structured
and exported
- binding layer (the part that relies on the receiver): currently fused
within the protocol
- connectiong layer (the part that manipulates connections): currently
fused within the protocol
- protocol (connection's control): shouldn't need to be exposed
ultimately once the elements above are in an easily sharable way.
The ->pause method is inappropriate since it doesn't exactly "pause" a
listener but rather temporarily disables it so that it's not visible at
all to let another process take its place. The term "suspend" is more
suitable, since the "pause" is actually what we'll need to apply to the
FULL and LIMITED states which really need to make a pause in the accept
process. And it goes well with the use of the "resume" function that
will also need to be made per-protocol.
Let's rename the function and make it act on the receiver since it's
already what it essentially does, hence the prefix "_rx" to make it
more explicit.
The protocol struct was a bit reordered because it was becoming a real
mess between the parts related to the listeners and those for the
receivers.
This one is common to the TCPv4 and UDPv4 code, it retrieves the
destination address of a socket, taking care of the possiblity that for
an incoming connection the traffic was possibly redirected. The TCP and
UDP definitions were updated to rely on it and remove duplicated code.
The new file sock.c will contain generic code for standard sockets
relying on file descriptors. We currently have way too much duplication
between proto_uxst, proto_tcp, proto_sockpair and proto_udp.
For now only get_src, get_dst and sock_create_server_socket were moved,
and are used where appropriate.
This is totally ugly, smp_fetch_src() is exported only so that stick_table.c
can (ab)use it in the {sc,src}_* sample fetch functions. It could be argued
that the sample could have been reconstructed there in place, but we don't
even need to duplicate the code. We'd rather simply retrieve the "src"
fetch's function from where it's used at init time and be done with it.
Let's not look at the listener options passed by the original process
and determine from the socket itself whether it is configured for
transparent mode or not. This is cleaner and safer, and doesn't rely
on flag values that could possibly change between versions.
This patch fixes all the leftovers from the include cleanup campaign. There
were not that many (~400 entries in ~150 files) but it was definitely worth
doing it as it revealed a few duplicates.
The type file is becoming a mess, half of it is for the proxy protocol,
another good part describes conn_streams and mux ops, it would deserve
being split again. At least it was reordered so that elements are easier
to find, with the PP-stuff left at the end. The MAX_SEND_FD macro was moved
to compat.h as it's said to be the value for Linux.
