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Use SIO_BASE_HANDLE to bypass LSPs

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This commit is contained in:
Bert Belder 2012-09-06 05:03:54 +02:00
parent fd94013fc2
commit 018cbff4b1
2 changed files with 23 additions and 3 deletions
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23
src/epoll.c
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@ -120,6 +120,7 @@ epoll_t epoll_create() {
int epoll_ctl(epoll_t port_handle, int op, SOCKET sock,
struct epoll_event* ev) {
epoll_port_data_t* port_data;
SOCKET base_sock;
port_data = (epoll_port_data_t*) port_handle;
@ -129,11 +130,28 @@ int epoll_ctl(epoll_t port_handle, int op, SOCKET sock,
epoll_op_t* op;
SOCKET peer_sock;
WSAPROTOCOL_INFOW protocol_info;
DWORD bytes;
int len;
/* Try to obtain a base handle for the socket, so we can bypass LSPs */
/* that get in the way if we want to talk to the kernel directly. If */
/* it fails we try if we work with the original socket. Note that on */
/* windows XP/2k3 this will always fail since they don't support the */
/* SIO_BASE_HANDLE ioctl. */
base_sock = sock;
WSAIoctl(sock,
SIO_BASE_HANDLE,
NULL,
0,
&base_sock,
sizeof base_sock,
&bytes,
NULL,
NULL);
/* Obtain protocol information about the socket. */
len = sizeof protocol_info;
if (getsockopt(sock,
if (getsockopt(base_sock,
SOL_SOCKET,
SO_PROTOCOL_INFOW,
(char*) &protocol_info,
@ -160,8 +178,7 @@ int epoll_ctl(epoll_t port_handle, int op, SOCKET sock,
}
sock_data->sock = sock;
/* TODO: actually get base socket. */
sock_data->base_sock = sock;
sock_data->base_sock = base_sock;
sock_data->op_generation = 0;
sock_data->submitted_events = 0;
sock_data->registered_events = ev->events | EPOLLERR | EPOLLHUP;

3
src/msafd.h
View File

@ -5,6 +5,9 @@
#include <windows.h>
#include "ntapi.h"
#ifndef SIO_BASE_HANDLE
# define SIO_BASE_HANDLE 0x48000022
#endif
#define AFD_NO_FAST_IO 0x00000001
#define AFD_OVERLAPPED 0x00000002