From 9b64495c6cd22cd65f118c18a36b2de7cbde4344 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 5 Jul 2020 17:09:58 +0200
Subject: pflocal: support SO_SNDBUF for unconnected sockets
We can store the requested value, to be applied when we connect the
sockets.
* pflocal/sock.h (struct sock): Add req_write_limit field.
* pflocal/sock.c (sock_create): Initialize req_write_limit field to 0.
(sock_connect): Bump the write_limit of the write pipe to the
req_write_limit value.
(sock_shutdown): Update req_write_limit from the write_limit of the
write pipe.
* pflocal/socket.c (S_socket_getopt, S_socket_setopt): When write_pipe
is NULL, use req_write_limit.
---
pflocal/sock.c | 5 +++++
1 file changed, 5 insertions(+)
(limited to 'pflocal/sock.c')
diff --git a/pflocal/sock.c b/pflocal/sock.c
index be64a3da..89ba16e2 100644
--- a/pflocal/sock.c
+++ b/pflocal/sock.c
@@ -116,6 +116,7 @@ sock_create (struct pipe_class *pipe_class, mode_t mode, struct sock **sock)
new->refs = 0;
new->flags = 0;
new->write_pipe = NULL;
+ new->req_write_limit = 0;
new->mode = mode;
new->id = MACH_PORT_NULL;
new->listen_queue = NULL;
@@ -397,6 +398,8 @@ sock_connect (struct sock *sock1, struct sock *sock2)
assert_backtrace (pipe); /* Since PFLOCAL_SOCK_SHUTDOWN_READ isn't set. */
pipe_add_writer (pipe);
wr->write_pipe = pipe;
+ if (pipe->write_limit < wr->req_write_limit)
+ pipe->write_limit = wr->req_write_limit;
}
}
@@ -474,6 +477,8 @@ sock_shutdown (struct sock *sock, unsigned flags)
/* Shutdown the write half. */
write_pipe = sock->write_pipe;
sock->write_pipe = NULL;
+ if (write_pipe)
+ sock->req_write_limit = write_pipe->write_limit;
}
/* Unlock SOCK here, as we may subsequently wake up other threads. */
--
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