New subject: [Bug 53911] DC++ is no longer able to retrieve file list from another user.

13 Nov 2022

https://bugs.winehq.org/show_bug.cgi?id=53911
Bug ID: 53911
           Summary: DC++ is no longer able to retrieve file list from
                    another user.
           Product: Wine
           Version: 6.12
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winsock
          Assignee: wine-bugs@winehq.org
          Reporter: dee3shee7aeno4@mailinator.com
      Distribution: ---
Since following commit DC++ is no longer able to retrieve the file list
from another user:
commit 8312539efe18533f6e2b35882d12e9d1bcbefa0d
Author: Zebediah Figura z.figura12@gmail.com
Date:   Fri Jun 25 20:21:08 2021 -0500
ws2_32: Use IOCTL_AFD_WINE_GET_SO_RCVBUF.
Signed-off-by: Zebediah Figura z.figura12@gmail.com
    Signed-off-by: Alexandre Julliard julliard@winehq.org
It looks like the application retrieves the buffer size
via a call to getsockopt(SO_RCVBUF), but unfortunately
receives a size of zero since the above commit.
The commit seems to not call getsockopt in the DC++ process any longer,
instead it returns the value from a wineserver call.
Wine-gdb> bt
#0  WS_getsockopt (s=<optimized out>, level=<optimized out>, optname=<optimized
out>, optval=0x3f2fba8 "", optlen=<optimized out>) at
wine/dlls/ws2_32/socket.c:2571
#1  0x0000000000667c7f in <lambda()>::operator() (__closure=<synthetic
pointer>) at dcpp/Socket.cpp:510
#2  dcpp::(anonymous
namespace)::check<dcpp::Socket::getSocketOptInt(int)::<lambda()> >
(blockOk=false, f=...) at dcpp/Socket.cpp:52
#3  dcpp::Socket::getSocketOptInt (this=0x29d6fc0, option=option@entry=4098) at
dcpp/Socket.cpp:510
#4  0x00000000005bd3aa in dcpp::BufferedSocket::threadAccept
(this=this@entry=0x29d8820) at dcpp/BufferedSocket.cpp:179
#5  0x00000000005c4418 in dcpp::BufferedSocket::checkEvents
(this=this@entry=0x29d8820) at dcpp/BufferedSocket.cpp:463
#6  0x00000000005c48e8 in dcpp::BufferedSocket::run (this=0x29d8820) at
dcpp/BufferedSocket.cpp:498
#7  0x000000000098c3da in dcpp::Thread::starter (p=<optimized out>) at
dcpp/Thread.h:107
https://sourceforge.net/p/dcplusplus/code/ci/default/tree/dcpp/Socket.cpp#l5...
https://sourceforge.net/p/dcplusplus/code/ci/default/tree/dcpp/BufferedSocke...
The wineserver sock->rcvbuf gets initialized here:
(gdb) bt
#0  create_socket () at wine/server/file.h:240
#1  0x0000555946fd7619 in accept_socket (sock=0x555949c36cc0) at
wine/server/sock.c:1618
#2  0x0000555946fd9c9e in sock_ioctl (fd=<optimized out>, code=<optimized out>,
async=0x555949c3fb40) at wine/server/sock.c:2016
#3  0x0000555946fb4481 in req_ioctl (req=0x555949c371c8, reply=0x7ffcfd2ec140)
at wine/server/fd.c:2794
#4  0x0000555946fd39cb in call_req_handler (thread=<optimized out>) at
wine/server/request.c:312
#5  0x0000555946fdcd10 in thread_poll_event (fd=<optimized out>,
event=<optimized out>) at wine/server/thread.c:388
#6  0x0000555946fb1c67 in main_loop_epoll () at wine/server/fd.c:525
#7  0x0000555946fb1ece in main_loop () at wine/server/fd.c:985
#8  0x0000555946fa3a80 in main ()
And following change makes DC++ work again with
wine-7.21, unsure if this is correct:

--- a/server/sock.c
+++ b/server/sock.c
@@ -1998,6 +1998,7 @@ static struct sock *accept_socket( struct sock *sock )
         acceptsock->window  = sock->window;
         acceptsock->message = sock->message;
         acceptsock->connect_time = current_time;
+        acceptsock->rcvbuf = sock->rcvbuf;
         if (sock->event) acceptsock->event = (struct event *)grab_object(
sock->event );
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[Bug 53911] New: DC++ is no longer able to retrieve file list from another user.