[Bug 59682] New: Windrose server: UDP bind to specific IPv4 behaves like 0.0.0.0%iface, causing wrong source IP and multihoming conflicts

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59682

            Bug ID: 59682
           Summary: Windrose server: UDP bind to specific IPv4 behaves
                    like 0.0.0.0%iface, causing wrong source IP and
                    multihoming conflicts
           Product: Wine
           Version: 11.0
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

A Windows dedicated server application (WindroseServer-Win64-Shipping.exe)
works correctly on native Windows, where binding to a specific IP via
-Multihome=<IP> results in UDP sockets bound to that IP:PORT.

Under Wine on Linux, the same server appears to bind correctly in Wine debug
logs, but the resulting Linux UDP socket shows up as 0.0.0.0%iface:PORT instead
of IP:PORT.

This causes two problems:

1. Outgoing UDP replies use the wrong source IP (the host's main IP instead of
the IP passed to -Multihome).
2. Multiple instances cannot use the same UDP port on different local IPs,
because the socket effectively behaves like 0.0.0.0:PORT instead of IP_A:PORT
and IP_B:PORT.

Tested with:

* host networking
* multiple public IPv4 addresses assigned on the same host
* command line using -Multihome=<IP>

Expected result:
UDP socket is bound to the specific IPv4 address, replies use that source IP,
and multiple instances can bind the same UDP port on different local IPs.

Actual result:
UDP socket appears as 0.0.0.0%iface:PORT, replies use the wrong source IP, and
same-port multi-IP hosting fails.

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[Bug 59682] Windrose server: UDP bind to specific IPv4 behaves like 0.0.0.0%iface, causing wrong source IP and multihoming conflicts

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59682

Zeb Figura <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
          Component|wineserver                  |winsock

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