[PATCH 0/1] MR2965: {server, ws2_32, ntdll}: Avoid using SOL_IPX to detect whether IPX is supported

[Billy Laws (＠bylaws)]

4.18+ Linux kernels remove support for IPX but keep SOL_IPX defined, which
causes compilation errors as wine unconditionally uses IPX structures if
this is the case. Instead check for IPX_MTU to determine IPX support as it is
defined within the ipx.h header itself.

[PATCH 1/1] {server, ws2_32, ntdll}: Avoid using SOL_IPX to detect whether IPX is supported

[Billy Laws]

From: Billy Laws

4.18+ Linux kernels remove support for IPX but keep SOL_IPX defined, which
causes compilation errors as wine unconditionally uses IPX structures if
this is the case. Instead check for IPX_MTU to determine IPX support as it is
defined within the ipx.h header itself.
---
 dlls/ntdll/unix/socket.c | 4 ++--
 dlls/ws2_32/unixlib.c    | 2 +-
 server/sock.c            | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/dlls/ntdll/unix/socket.c b/dlls/ntdll/unix/socket.c
index 4e706323a0a..e584bebb8d8 100644
--- a/dlls/ntdll/unix/socket.c
+++ b/dlls/ntdll/unix/socket.c
@@ -54,7 +54,7 @@
 # endif
 # include <linux/ipx.h>
 #endif
-#if defined(SOL_IPX) || defined(SO_DEFAULT_HEADERS)
+#if defined(IPX_MTU) || defined(SO_DEFAULT_HEADERS)
 # define HAS_IPX
 #endif

@@ -2402,7 +2402,7 @@ NTSTATUS sock_ioctl( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc
             break;
         }

-#ifdef SOL_IPX
+#if defined(HAS_IPX) && defined(SOL_IPX)
         case IOCTL_AFD_WINE_GET_IPX_PTYPE:
             return do_getsockopt( handle, io, SOL_IPX, IPX_TYPE, out_buffer, out_size );

diff --git a/dlls/ws2_32/unixlib.c b/dlls/ws2_32/unixlib.c
index 4646e8ff26f..a9d08c1a277 100644
--- a/dlls/ws2_32/unixlib.c
+++ b/dlls/ws2_32/unixlib.c
@@ -75,7 +75,7 @@
 # endif
 # include <linux/ipx.h>
 #endif
-#if defined(SOL_IPX) || defined(SO_DEFAULT_HEADERS)
+#if defined(IPX_MTU) || defined(SO_DEFAULT_HEADERS)
 # define HAS_IPX
 #endif

diff --git a/server/sock.c b/server/sock.c
index 088e6d63079..63019a18e85 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -71,7 +71,7 @@
 # endif
 # include <linux/ipx.h>
 #endif
-#if defined(SOL_IPX) || defined(SO_DEFAULT_HEADERS)
+#if defined(IPX_MTU) || defined(SO_DEFAULT_HEADERS)
 # define HAS_IPX
 #endif

[Zebediah Figura (＠zfigura)]

On my machine IPX definitions are provided by netipx/ipx.h, which is apparently part of glibc. I guess this is something that only affects environments with alternate libcs?

Should we instead define HAS_IPX based on whether netipx/ipx.h or linux/ipx.h is present?

[Billy Laws (＠bylaws)]

On Mon Jun  5 08:39:21 2023 +0000, Zebediah Figura wrote:
> On my machine IPX definitions are provided by netipx/ipx.h, which is
> apparently part of glibc. I guess this is something that only affects
> environments with alternate libcs?
> Should we instead define HAS_IPX based on whether netipx/ipx.h or
> linux/ipx.h is present?

Yeah, I am using bionic hence why I'm running into this issue. By checking for IPX_MTU that's what this effectively does as that's only defined in ipx.h, but I can split it into  just defining it for each of the different include cases if you'd prefer.