Signed-off-by: Zebediah Figura zfigura@codeweavers.com --- dlls/ntdll/unix/socket.c | 99 +++++++++++++++++++++++++++++++++++----- 1 file changed, 87 insertions(+), 12 deletions(-)
diff --git a/dlls/ntdll/unix/socket.c b/dlls/ntdll/unix/socket.c index 9cc9352403d..b988253c67a 100644 --- a/dlls/ntdll/unix/socket.c +++ b/dlls/ntdll/unix/socket.c @@ -107,7 +107,7 @@ union unix_sockaddr struct async_recv_ioctl { struct async_fileio io; - WSABUF *control; + void *control; struct WS_sockaddr *addr; int *addr_len; DWORD *ret_flags; @@ -504,8 +504,62 @@ error: control->len = 0; return 0; } +#else +static int convert_control_headers(struct msghdr *hdr, WSABUF *control) +{ + ERR( "Message control headers cannot be properly supported on this system.\n" ); + control->len = 0; + return 0; +} #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
+struct cmsghdr_32 +{ + ULONG cmsg_len; + INT cmsg_level; + INT cmsg_type; + /* UCHAR cmsg_data[]; */ +}; + +static size_t cmsg_align_32( size_t len ) +{ + return (len + sizeof(ULONG) - 1) & ~(sizeof(ULONG) - 1); +} + +/* we assume that cmsg_data does not require translation, which is currently + * true for all messages */ +static int wow64_translate_control( const WSABUF *control64, struct afd_wsabuf_32 *control32 ) +{ + char *const buf32 = ULongToPtr(control32->buf); + const ULONG max_len = control32->len; + const char *ptr64 = control64->buf; + char *ptr32 = buf32; + + while (ptr64 < control64->buf + control64->len) + { + struct cmsghdr_32 *cmsg32 = (struct cmsghdr_32 *)ptr32; + const WSACMSGHDR *cmsg64 = (const WSACMSGHDR *)ptr64; + + if (ptr32 + sizeof(*cmsg32) + cmsg_align_32( cmsg64->cmsg_len ) > buf32 + max_len) + { + control32->len = 0; + return 0; + } + + cmsg32->cmsg_len = cmsg64->cmsg_len - sizeof(*cmsg64) + sizeof(*cmsg32); + cmsg32->cmsg_level = cmsg64->cmsg_level; + cmsg32->cmsg_type = cmsg64->cmsg_type; + memcpy( cmsg32 + 1, cmsg64 + 1, cmsg64->cmsg_len ); + + ptr64 += WSA_CMSG_ALIGN( cmsg64->cmsg_len ); + ptr32 += cmsg_align_32( cmsg32->cmsg_len ); + } + + control32->len = ptr32 - buf32; + FIXME("-> %d\n", control32->len); + return 1; +} + static NTSTATUS try_recv( int fd, struct async_recv_ioctl *async, ULONG_PTR *size ) { #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS @@ -543,20 +597,41 @@ static NTSTATUS try_recv( int fd, struct async_recv_ioctl *async, ULONG_PTR *siz
status = (hdr.msg_flags & MSG_TRUNC) ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
-#ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS if (async->control) { - ERR( "Message control headers cannot be properly supported on this system.\n" ); - async->control->len = 0; - } -#else - if (async->control && !convert_control_headers( &hdr, async->control )) - { - WARN( "Application passed insufficient room for control headers.\n" ); - *async->ret_flags |= WS_MSG_CTRUNC; - status = STATUS_BUFFER_OVERFLOW; + if (in_wow64_call()) + { + char control_buffer64[512]; + WSABUF wsabuf; + + wsabuf.len = sizeof(control_buffer64); + wsabuf.buf = control_buffer64; + if (convert_control_headers( &hdr, &wsabuf )) + { + if (!wow64_translate_control( &wsabuf, async->control )) + { + WARN( "Application passed insufficient room for control headers.\n" ); + *async->ret_flags |= WS_MSG_CTRUNC; + status = STATUS_BUFFER_OVERFLOW; + } + } + else + { + FIXME( "control buffer is too small\n" ); + *async->ret_flags |= WS_MSG_CTRUNC; + status = STATUS_BUFFER_OVERFLOW; + } + } + else + { + if (!convert_control_headers( &hdr, async->control )) + { + WARN( "Application passed insufficient room for control headers.\n" ); + *async->ret_flags |= WS_MSG_CTRUNC; + status = STATUS_BUFFER_OVERFLOW; + } + } } -#endif
/* If this socket is connected, Linux doesn't give us msg_name and * msg_namelen from recvmsg, but it does set msg_namelen to zero.