[Bug 50352] New: Maximum sockets per process is set very low

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50352

            Bug ID: 50352
           Summary: Maximum sockets per process is set very low
           Product: Wine
           Version: 5.22
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winsock
          Assignee: wine-bugs at winehq.org
          Reporter: skreech at skree.ch
      Distribution: ---

Created attachment 68942
  --> https://bugs.winehq.org/attachment.cgi?id=68942
TWGS warning at startup

Within wine-5.22/dlls/ws2_32/socket.c, the maximum number of sockets per
process is set and used like so:

> #define WS_MAX_SOCKETS_PER_PROCESS      128     /* reasonable guess */

and:

>     lpWSAData->iMaxSockets = WS_MAX_SOCKETS_PER_PROCESS;

This became relevant when I ran the TradeWars 2002 game server (TWGS) under a
maximum license allowing 100 simultaneous players. On startup, it logs a
message warning that the OS's number of sockets per process is limited to 128,
therefore no more than 63 players will be able to connect. This makes sense,
since two sockets are required per player connection, and one SysOp connection
is reserved.

Changing WS_MAX_SOCKETS_PER_PROCESS to 1024 and recompiling WINE results in
TWGS not experiencing this limit and not giving the warning.

Also, I tested TWGS under ReactOS and did not experience limit nor warning.
Peeking into their socket.c, I notice that their limit is set to 32767, or 0,
depending:

https://github.com/reactos/reactos/search?q=iMaxSockets

It seems likely that WS_MAX_SOCKETS_PER_PROCESS should be set to 32767 here if
any value is being set, given that the underlying OS should be the one imposing
its own limits or lack of limit.

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