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Sweden-Number/server/sock.c

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/*
* Server-side socket management
*
* Copyright (C) 1999 Marcus Meissner, Ove Kåven
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* FIXME: we use read|write access in all cases. Shouldn't we depend that
* on the access of the current handle?
*/
#include "config.h"
#include <assert.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_POLL_H
# include <poll.h>
#endif
#include <sys/time.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include <time.h>
#include <unistd.h>
#include <limits.h>
#ifdef HAVE_LINUX_RTNETLINK_H
# include <linux/rtnetlink.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "winerror.h"
#define USE_WS_PREFIX
#include "winsock2.h"
#include "process.h"
#include "file.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
#include "user.h"
/* From winsock.h */
#define FD_MAX_EVENTS 10
#define FD_READ_BIT 0
#define FD_WRITE_BIT 1
#define FD_OOB_BIT 2
#define FD_ACCEPT_BIT 3
#define FD_CONNECT_BIT 4
#define FD_CLOSE_BIT 5
/*
* Define flags to be used with the WSAAsyncSelect() call.
*/
#define FD_READ 0x00000001
#define FD_WRITE 0x00000002
#define FD_OOB 0x00000004
#define FD_ACCEPT 0x00000008
#define FD_CONNECT 0x00000010
#define FD_CLOSE 0x00000020
/* internal per-socket flags */
#define FD_WINE_LISTENING 0x10000000
#define FD_WINE_NONBLOCKING 0x20000000
#define FD_WINE_CONNECTED 0x40000000
#define FD_WINE_RAW 0x80000000
#define FD_WINE_INTERNAL 0xFFFF0000
struct sock
{
struct object obj; /* object header */
struct fd *fd; /* socket file descriptor */
unsigned int state; /* status bits */
unsigned int mask; /* event mask */
unsigned int hmask; /* held (blocked) events */
unsigned int pmask; /* pending events */
unsigned int flags; /* socket flags */
int polling; /* is socket being polled? */
unsigned short proto; /* socket protocol */
unsigned short type; /* socket type */
unsigned short family; /* socket family */
struct event *event; /* event object */
user_handle_t window; /* window to send the message to */
unsigned int message; /* message to send */
obj_handle_t wparam; /* message wparam (socket handle) */
int errors[FD_MAX_EVENTS]; /* event errors */
timeout_t connect_time;/* time the socket was connected */
struct sock *deferred; /* socket that waits for a deferred accept */
struct async_queue *read_q; /* queue for asynchronous reads */
struct async_queue *write_q; /* queue for asynchronous writes */
struct async_queue *ifchange_q; /* queue for interface change notifications */
struct object *ifchange_obj; /* the interface change notification object */
struct list ifchange_entry; /* entry in ifchange notification list */
};
static void sock_dump( struct object *obj, int verbose );
static int sock_signaled( struct object *obj, struct wait_queue_entry *entry );
static struct fd *sock_get_fd( struct object *obj );
static void sock_destroy( struct object *obj );
static struct async_queue *sock_get_ifchange_q( struct sock *sock );
static void sock_destroy_ifchange_q( struct sock *sock );
static int sock_get_poll_events( struct fd *fd );
static void sock_poll_event( struct fd *fd, int event );
static enum server_fd_type sock_get_fd_type( struct fd *fd );
static obj_handle_t sock_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async, int blocking );
static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
static int sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
static int sock_get_ntstatus( int err );
static int sock_get_error( int err );
static void sock_set_error(void);
static const struct object_ops sock_ops =
{
sizeof(struct sock), /* size */
sock_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
sock_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
sock_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
fd_close_handle, /* close_handle */
sock_destroy /* destroy */
};
static const struct fd_ops sock_fd_ops =
{
sock_get_poll_events, /* get_poll_events */
sock_poll_event, /* poll_event */
sock_get_fd_type, /* get_fd_type */
no_fd_read, /* read */
no_fd_write, /* write */
no_fd_flush, /* flush */
sock_ioctl, /* ioctl */
sock_queue_async, /* queue_async */
sock_reselect_async, /* reselect_async */
sock_cancel_async /* cancel_async */
};
/* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
* we post messages if there are multiple events. Used to send
* messages. The problem is if there is both a FD_CONNECT event and,
* say, an FD_READ event available on the same socket, we want to
* notify the app of the connect event first. Otherwise it may
* discard the read event because it thinks it hasn't connected yet.
*/
static const int event_bitorder[FD_MAX_EVENTS] =
{
FD_CONNECT_BIT,
FD_ACCEPT_BIT,
FD_OOB_BIT,
FD_WRITE_BIT,
FD_READ_BIT,
FD_CLOSE_BIT,
6, 7, 8, 9 /* leftovers */
};
/* Flags that make sense only for SOCK_STREAM sockets */
#define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
typedef enum {
SOCK_SHUTDOWN_ERROR = -1,
SOCK_SHUTDOWN_EOF = 0,
SOCK_SHUTDOWN_POLLHUP = 1
} sock_shutdown_t;
static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
static sock_shutdown_t sock_check_pollhup(void)
{
sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
int fd[2], n;
struct pollfd pfd;
char dummy;
if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) return ret;
if ( shutdown( fd[0], 1 ) ) goto out;
pfd.fd = fd[1];
pfd.events = POLLIN;
pfd.revents = 0;
/* Solaris' poll() sometimes returns nothing if given a 0ms timeout here */
n = poll( &pfd, 1, 1 );
if ( n != 1 ) goto out; /* error or timeout */
if ( pfd.revents & POLLHUP )
ret = SOCK_SHUTDOWN_POLLHUP;
else if ( pfd.revents & POLLIN &&
read( fd[1], &dummy, 1 ) == 0 )
ret = SOCK_SHUTDOWN_EOF;
out:
close( fd[0] );
close( fd[1] );
return ret;
}
void sock_init(void)
{
sock_shutdown_type = sock_check_pollhup();
switch ( sock_shutdown_type )
{
case SOCK_SHUTDOWN_EOF:
if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
break;
case SOCK_SHUTDOWN_POLLHUP:
if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
break;
default:
fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
sock_shutdown_type = SOCK_SHUTDOWN_EOF;
}
}
static int sock_reselect( struct sock *sock )
{
int ev = sock_get_poll_events( sock->fd );
if (debug_level)
fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
if (!sock->polling) /* FIXME: should find a better way to do this */
{
/* previously unconnected socket, is this reselect supposed to connect it? */
if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
/* ok, it is, attach it to the wineserver's main poll loop */
sock->polling = 1;
allow_fd_caching( sock->fd );
}
/* update condition mask */
set_fd_events( sock->fd, ev );
return ev;
}
/* wake anybody waiting on the socket event or send the associated message */
static void sock_wake_up( struct sock *sock )
{
unsigned int events = sock->pmask & sock->mask;
int i;
if ( !events ) return;
if (sock->event)
{
if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
set_event( sock->event );
}
if (sock->window)
{
if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
for (i = 0; i < FD_MAX_EVENTS; i++)
{
int event = event_bitorder[i];
if (sock->pmask & (1 << event))
{
lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
post_message( sock->window, sock->message, sock->wparam, lparam );
}
}
sock->pmask = 0;
sock_reselect( sock );
}
}
static inline int sock_error( struct fd *fd )
{
unsigned int optval = 0;
socklen_t optlen = sizeof(optval);
getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
return optval;
}
static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
{
if ( sock->flags & WSA_FLAG_OVERLAPPED )
{
if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
{
if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
async_wake_up( sock->read_q, STATUS_ALERTED );
event &= ~(POLLIN|POLLPRI);
}
if ( event & POLLOUT && async_waiting( sock->write_q ) )
{
if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
async_wake_up( sock->write_q, STATUS_ALERTED );
event &= ~POLLOUT;
}
if ( event & (POLLERR|POLLHUP) )
{
int status = sock_get_ntstatus( error );
if ( !(sock->state & FD_READ) )
async_wake_up( sock->read_q, status );
if ( !(sock->state & FD_WRITE) )
async_wake_up( sock->write_q, status );
}
}
return event;
}
static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
{
if (prevstate & FD_CONNECT)
{
sock->pmask |= FD_CONNECT;
sock->hmask |= FD_CONNECT;
sock->errors[FD_CONNECT_BIT] = error;
goto end;
}
if (prevstate & FD_WINE_LISTENING)
{
sock->pmask |= FD_ACCEPT;
sock->hmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = error;
goto end;
}
if (event & POLLIN)
{
sock->pmask |= FD_READ;
sock->hmask |= FD_READ;
sock->errors[FD_READ_BIT] = 0;
}
if (event & POLLOUT)
{
sock->pmask |= FD_WRITE;
sock->hmask |= FD_WRITE;
sock->errors[FD_WRITE_BIT] = 0;
}
if (event & POLLPRI)
{
sock->pmask |= FD_OOB;
sock->hmask |= FD_OOB;
sock->errors[FD_OOB_BIT] = 0;
}
if (event & (POLLERR|POLLHUP))
{
sock->pmask |= FD_CLOSE;
sock->hmask |= FD_CLOSE;
sock->errors[FD_CLOSE_BIT] = error;
}
end:
sock_wake_up( sock );
}
static void sock_poll_event( struct fd *fd, int event )
{
struct sock *sock = get_fd_user( fd );
int hangup_seen = 0;
int prevstate = sock->state;
int error = 0;
assert( sock->obj.ops == &sock_ops );
if (debug_level)
fprintf(stderr, "socket %p select event: %x\n", sock, event);
/* we may change event later, remove from loop here */
if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
if (sock->state & FD_CONNECT)
{
if (event & (POLLERR|POLLHUP))
{
/* we didn't get connected? */
sock->state &= ~FD_CONNECT;
event &= ~POLLOUT;
error = sock_error( fd );
}
else if (event & POLLOUT)
{
/* we got connected */
sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
sock->state &= ~FD_CONNECT;
sock->connect_time = current_time;
}
}
else if (sock->state & FD_WINE_LISTENING)
{
/* listening */
if (event & (POLLERR|POLLHUP))
error = sock_error( fd );
}
else
{
/* normal data flow */
if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
{
char dummy;
int nr;
/* Linux 2.4 doesn't report POLLHUP if only one side of the socket
* has been closed, so we need to check for it explicitly here */
nr = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
if ( nr == 0 )
{
hangup_seen = 1;
event &= ~POLLIN;
}
else if ( nr < 0 )
{
event &= ~POLLIN;
/* EAGAIN can happen if an async recv() falls between the server's poll()
call and the invocation of this routine */
if ( errno != EAGAIN )
{
error = errno;
event |= POLLERR;
if ( debug_level )
fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
}
}
}
if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
{
error = error ? error : sock_error( fd );
if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
sock->state &= ~FD_WRITE;
sock->state &= ~FD_READ;
if (debug_level)
fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
}
if (hangup_seen)
event |= POLLHUP;
}
event = sock_dispatch_asyncs( sock, event, error );
sock_dispatch_events( sock, prevstate, event, error );
/* if anyone is stupid enough to wait on the socket object itself,
* maybe we should wake them up too, just in case? */
wake_up( &sock->obj, 0 );
sock_reselect( sock );
}
static void sock_dump( struct object *obj, int verbose )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
fprintf( stderr, "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
sock->fd, sock->state,
sock->mask, sock->pmask, sock->hmask );
}
static int sock_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
}
static int sock_get_poll_events( struct fd *fd )
{
struct sock *sock = get_fd_user( fd );
unsigned int mask = sock->mask & ~sock->hmask;
unsigned int smask = sock->state & mask;
int ev = 0;
assert( sock->obj.ops == &sock_ops );
if (sock->state & FD_CONNECT)
/* connecting, wait for writable */
return POLLOUT;
if ( async_queued( sock->read_q ) )
{
if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
}
else if (smask & FD_READ || (sock->state & FD_WINE_LISTENING && mask & FD_ACCEPT))
ev |= POLLIN | POLLPRI;
/* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
!(sock->hmask & FD_READ) )
ev |= POLLIN;
if ( async_queued( sock->write_q ) )
{
if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
}
else if (smask & FD_WRITE)
ev |= POLLOUT;
return ev;
}
static enum server_fd_type sock_get_fd_type( struct fd *fd )
{
return FD_TYPE_SOCKET;
}
obj_handle_t sock_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data, int blocking )
{
struct sock *sock = get_fd_user( fd );
obj_handle_t wait_handle = 0;
struct async_queue *ifchange_q;
struct async *async;
assert( sock->obj.ops == &sock_ops );
switch(code)
{
case WS_SIO_ADDRESS_LIST_CHANGE:
if ((sock->state & FD_WINE_NONBLOCKING) && !blocking)
{
set_error( STATUS_CANT_WAIT );
return 0;
}
if (!(ifchange_q = sock_get_ifchange_q( sock ))) return 0;
if (!(async = create_async( current, ifchange_q, async_data ))) return 0;
if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
release_object( async );
set_error( STATUS_PENDING );
return wait_handle;
default:
set_error( STATUS_NOT_SUPPORTED );
return 0;
}
}
static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
{
struct sock *sock = get_fd_user( fd );
struct async *async;
struct async_queue *queue;
assert( sock->obj.ops == &sock_ops );
switch (type)
{
case ASYNC_TYPE_READ:
if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
queue = sock->read_q;
break;
case ASYNC_TYPE_WRITE:
if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
queue = sock->write_q;
break;
default:
set_error( STATUS_INVALID_PARAMETER );
return;
}
if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ ) ||
( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
{
set_error( STATUS_PIPE_DISCONNECTED );
return;
}
if (!(async = create_async( current, queue, data ))) return;
release_object( async );
sock_reselect( sock );
set_error( STATUS_PENDING );
}
static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
{
struct sock *sock = get_fd_user( fd );
sock_reselect( sock );
}
static int sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
{
struct sock *sock = get_fd_user( fd );
int n = 0;
assert( sock->obj.ops == &sock_ops );
n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
n += async_wake_up_by( sock->ifchange_q, process, thread, iosb, STATUS_CANCELLED );
return n;
}
static struct fd *sock_get_fd( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
return (struct fd *)grab_object( sock->fd );
}
static void sock_destroy( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
/* FIXME: special socket shutdown stuff? */
if ( sock->deferred )
release_object( sock->deferred );
free_async_queue( sock->read_q );
free_async_queue( sock->write_q );
sock_destroy_ifchange_q( sock );
if (sock->event) release_object( sock->event );
if (sock->fd)
{
/* shut the socket down to force pending poll() calls in the client to return */
shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
release_object( sock->fd );
}
}
static void init_sock(struct sock *sock)
{
sock->state = 0;
sock->mask = 0;
sock->hmask = 0;
sock->pmask = 0;
sock->polling = 0;
sock->flags = 0;
sock->type = 0;
sock->family = 0;
sock->event = NULL;
sock->window = 0;
sock->message = 0;
sock->wparam = 0;
sock->connect_time = 0;
sock->deferred = NULL;
sock->read_q = NULL;
sock->write_q = NULL;
sock->ifchange_q = NULL;
sock->ifchange_obj = NULL;
memset( sock->errors, 0, sizeof(sock->errors) );
}
/* create a new and unconnected socket */
static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
{
struct sock *sock;
int sockfd;
sockfd = socket( family, type, protocol );
if (debug_level)
fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
if (sockfd == -1)
{
sock_set_error();
return NULL;
}
fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
if (!(sock = alloc_object( &sock_ops )))
{
close( sockfd );
return NULL;
}
init_sock( sock );
sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
sock->flags = flags;
sock->proto = protocol;
sock->type = type;
sock->family = family;
if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
(flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
{
release_object( sock );
return NULL;
}
sock_reselect( sock );
clear_error();
return &sock->obj;
}
/* accepts a socket and inits it */
static int accept_new_fd( struct sock *sock )
{
/* Try to accept(2). We can't be safe that this an already connected socket
* or that accept() is allowed on it. In those cases we will get -1/errno
* return.
*/
int acceptfd;
struct sockaddr saddr;
socklen_t slen = sizeof(saddr);
acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
if (acceptfd == -1)
{
sock_set_error();
return acceptfd;
}
fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
return acceptfd;
}
/* accept a socket (creates a new fd) */
static struct sock *accept_socket( obj_handle_t handle )
{
struct sock *acceptsock;
struct sock *sock;
int acceptfd;
sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
if (!sock)
return NULL;
if ( sock->deferred )
{
acceptsock = sock->deferred;
sock->deferred = NULL;
}
else
{
if ((acceptfd = accept_new_fd( sock )) == -1)
{
release_object( sock );
return NULL;
}
if (!(acceptsock = alloc_object( &sock_ops )))
{
close( acceptfd );
release_object( sock );
return NULL;
}
init_sock( acceptsock );
/* newly created socket gets the same properties of the listening socket */
acceptsock->state = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
if (sock->state & FD_WINE_NONBLOCKING)
acceptsock->state |= FD_WINE_NONBLOCKING;
acceptsock->mask = sock->mask;
acceptsock->proto = sock->proto;
acceptsock->type = sock->type;
acceptsock->family = sock->family;
acceptsock->window = sock->window;
acceptsock->message = sock->message;
acceptsock->connect_time = current_time;
if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
acceptsock->flags = sock->flags;
if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
get_fd_options( sock->fd ) )))
{
release_object( acceptsock );
release_object( sock );
return NULL;
}
}
clear_error();
sock->pmask &= ~FD_ACCEPT;
sock->hmask &= ~FD_ACCEPT;
sock_reselect( sock );
release_object( sock );
return acceptsock;
}
static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
{
int acceptfd;
struct fd *newfd;
if ( sock->deferred )
{
newfd = dup_fd_object( sock->deferred->fd, 0, 0,
get_fd_options( acceptsock->fd ) );
if ( !newfd )
return FALSE;
set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
release_object( sock->deferred );
sock->deferred = NULL;
}
else
{
if ((acceptfd = accept_new_fd( sock )) == -1)
return FALSE;
if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
get_fd_options( acceptsock->fd ) )))
return FALSE;
}
acceptsock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
acceptsock->hmask = 0;
acceptsock->pmask = 0;
acceptsock->polling = 0;
acceptsock->proto = sock->proto;
acceptsock->type = sock->type;
acceptsock->family = sock->family;
acceptsock->wparam = 0;
acceptsock->deferred = NULL;
acceptsock->connect_time = current_time;
fd_copy_completion( acceptsock->fd, newfd );
release_object( acceptsock->fd );
acceptsock->fd = newfd;
clear_error();
sock->pmask &= ~FD_ACCEPT;
sock->hmask &= ~FD_ACCEPT;
sock_reselect( sock );
return TRUE;
}
/* return an errno value mapped to a WSA error */
static int sock_get_error( int err )
{
switch (err)
{
case EINTR: return WSAEINTR;
case EBADF: return WSAEBADF;
case EPERM:
case EACCES: return WSAEACCES;
case EFAULT: return WSAEFAULT;
case EINVAL: return WSAEINVAL;
case EMFILE: return WSAEMFILE;
case EWOULDBLOCK: return WSAEWOULDBLOCK;
case EINPROGRESS: return WSAEINPROGRESS;
case EALREADY: return WSAEALREADY;
case ENOTSOCK: return WSAENOTSOCK;
case EDESTADDRREQ: return WSAEDESTADDRREQ;
case EMSGSIZE: return WSAEMSGSIZE;
case EPROTOTYPE: return WSAEPROTOTYPE;
case ENOPROTOOPT: return WSAENOPROTOOPT;
case EPROTONOSUPPORT: return WSAEPROTONOSUPPORT;
case ESOCKTNOSUPPORT: return WSAESOCKTNOSUPPORT;
case EOPNOTSUPP: return WSAEOPNOTSUPP;
case EPFNOSUPPORT: return WSAEPFNOSUPPORT;
case EAFNOSUPPORT: return WSAEAFNOSUPPORT;
case EADDRINUSE: return WSAEADDRINUSE;
case EADDRNOTAVAIL: return WSAEADDRNOTAVAIL;
case ENETDOWN: return WSAENETDOWN;
case ENETUNREACH: return WSAENETUNREACH;
case ENETRESET: return WSAENETRESET;
case ECONNABORTED: return WSAECONNABORTED;
case EPIPE:
case ECONNRESET: return WSAECONNRESET;
case ENOBUFS: return WSAENOBUFS;
case EISCONN: return WSAEISCONN;
case ENOTCONN: return WSAENOTCONN;
case ESHUTDOWN: return WSAESHUTDOWN;
case ETOOMANYREFS: return WSAETOOMANYREFS;
case ETIMEDOUT: return WSAETIMEDOUT;
case ECONNREFUSED: return WSAECONNREFUSED;
case ELOOP: return WSAELOOP;
case ENAMETOOLONG: return WSAENAMETOOLONG;
case EHOSTDOWN: return WSAEHOSTDOWN;
case EHOSTUNREACH: return WSAEHOSTUNREACH;
case ENOTEMPTY: return WSAENOTEMPTY;
#ifdef EPROCLIM
case EPROCLIM: return WSAEPROCLIM;
#endif
#ifdef EUSERS
case EUSERS: return WSAEUSERS;
#endif
#ifdef EDQUOT
case EDQUOT: return WSAEDQUOT;
#endif
#ifdef ESTALE
case ESTALE: return WSAESTALE;
#endif
#ifdef EREMOTE
case EREMOTE: return WSAEREMOTE;
#endif
case 0: return 0;
default:
errno = err;
perror("wineserver: sock_get_error() can't map error");
return WSAEFAULT;
}
}
static int sock_get_ntstatus( int err )
{
switch ( err )
{
case EBADF: return STATUS_INVALID_HANDLE;
case EBUSY: return STATUS_DEVICE_BUSY;
case EPERM:
case EACCES: return STATUS_ACCESS_DENIED;
case EFAULT: return STATUS_NO_MEMORY;
case EINVAL: return STATUS_INVALID_PARAMETER;
case ENFILE:
case EMFILE: return STATUS_TOO_MANY_OPENED_FILES;
case EWOULDBLOCK: return STATUS_CANT_WAIT;
case EINPROGRESS: return STATUS_PENDING;
case EALREADY: return STATUS_NETWORK_BUSY;
case ENOTSOCK: return STATUS_OBJECT_TYPE_MISMATCH;
case EDESTADDRREQ: return STATUS_INVALID_PARAMETER;
case EMSGSIZE: return STATUS_BUFFER_OVERFLOW;
case EPROTONOSUPPORT:
case ESOCKTNOSUPPORT:
case EPFNOSUPPORT:
case EAFNOSUPPORT:
case EPROTOTYPE: return STATUS_NOT_SUPPORTED;
case ENOPROTOOPT: return STATUS_INVALID_PARAMETER;
case EOPNOTSUPP: return STATUS_NOT_SUPPORTED;
case EADDRINUSE: return STATUS_ADDRESS_ALREADY_ASSOCIATED;
case EADDRNOTAVAIL: return STATUS_INVALID_PARAMETER;
case ECONNREFUSED: return STATUS_CONNECTION_REFUSED;
case ESHUTDOWN: return STATUS_PIPE_DISCONNECTED;
case ENOTCONN: return STATUS_CONNECTION_DISCONNECTED;
case ETIMEDOUT: return STATUS_IO_TIMEOUT;
case ENETUNREACH: return STATUS_NETWORK_UNREACHABLE;
case EHOSTUNREACH: return STATUS_HOST_UNREACHABLE;
case ENETDOWN: return STATUS_NETWORK_BUSY;
case EPIPE:
case ECONNRESET: return STATUS_CONNECTION_RESET;
case ECONNABORTED: return STATUS_CONNECTION_ABORTED;
case 0: return STATUS_SUCCESS;
default:
errno = err;
perror("wineserver: sock_get_ntstatus() can't map error");
return STATUS_UNSUCCESSFUL;
}
}
/* set the last error depending on errno */
static void sock_set_error(void)
{
set_error( sock_get_ntstatus( errno ) );
}
#ifdef HAVE_LINUX_RTNETLINK_H
/* only keep one ifchange object around, all sockets waiting for wakeups will look to it */
static struct object *ifchange_object;
static void ifchange_dump( struct object *obj, int verbose );
static struct fd *ifchange_get_fd( struct object *obj );
static void ifchange_destroy( struct object *obj );
static int ifchange_get_poll_events( struct fd *fd );
static void ifchange_poll_event( struct fd *fd, int event );
static void ifchange_reselect_async( struct fd *fd, struct async_queue *queue );
struct ifchange
{
struct object obj; /* object header */
struct fd *fd; /* interface change file descriptor */
struct list sockets; /* list of sockets to send interface change notifications */
};
static const struct object_ops ifchange_ops =
{
sizeof(struct ifchange), /* size */
ifchange_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
ifchange_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
ifchange_destroy /* destroy */
};
static const struct fd_ops ifchange_fd_ops =
{
ifchange_get_poll_events, /* get_poll_events */
ifchange_poll_event, /* poll_event */
NULL, /* get_fd_type */
no_fd_read, /* read */
no_fd_write, /* write */
no_fd_flush, /* flush */
no_fd_ioctl, /* ioctl */
NULL, /* queue_async */
ifchange_reselect_async, /* reselect_async */
NULL /* cancel_async */
};
static void ifchange_dump( struct object *obj, int verbose )
{
assert( obj->ops == &ifchange_ops );
fprintf( stderr, "Interface change\n" );
}
static struct fd *ifchange_get_fd( struct object *obj )
{
struct ifchange *ifchange = (struct ifchange *)obj;
return (struct fd *)grab_object( ifchange->fd );
}
static void ifchange_destroy( struct object *obj )
{
struct ifchange *ifchange = (struct ifchange *)obj;
assert( obj->ops == &ifchange_ops );
release_object( ifchange->fd );
/* reset the global ifchange object so that it will be recreated if it is needed again */
assert( obj == ifchange_object );
ifchange_object = NULL;
}
static int ifchange_get_poll_events( struct fd *fd )
{
return POLLIN;
}
/* wake up all the sockets waiting for a change notification event */
static void ifchange_wake_up( struct object *obj, unsigned int status )
{
struct ifchange *ifchange = (struct ifchange *)obj;
struct list *ptr, *next;
assert( obj->ops == &ifchange_ops );
assert( obj == ifchange_object );
LIST_FOR_EACH_SAFE( ptr, next, &ifchange->sockets )
{
struct sock *sock = LIST_ENTRY( ptr, struct sock, ifchange_entry );
assert( sock->ifchange_q );
async_wake_up( sock->ifchange_q, status ); /* issue ifchange notification for the socket */
sock_destroy_ifchange_q( sock ); /* remove socket from list and decrement ifchange refcount */
}
}
static void ifchange_poll_event( struct fd *fd, int event )
{
struct object *ifchange = get_fd_user( fd );
unsigned int status = STATUS_PENDING;
char buffer[PIPE_BUF];
int r;
r = recv( get_unix_fd(fd), buffer, sizeof(buffer), MSG_DONTWAIT );
if (r < 0)
{
if (errno == EWOULDBLOCK || errno == EAGAIN)
return; /* retry when poll() says the socket is ready */
status = sock_get_ntstatus( errno );
}
else if (r > 0)
{
struct nlmsghdr *nlh;
for (nlh = (struct nlmsghdr *)buffer; NLMSG_OK(nlh, r); nlh = NLMSG_NEXT(nlh, r))
{
if (nlh->nlmsg_type == NLMSG_DONE)
break;
if (nlh->nlmsg_type == RTM_NEWADDR || nlh->nlmsg_type == RTM_DELADDR)
status = STATUS_SUCCESS;
}
}
else status = STATUS_CANCELLED;
if (status != STATUS_PENDING) ifchange_wake_up( ifchange, status );
}
static void ifchange_reselect_async( struct fd *fd, struct async_queue *queue )
{
/* do nothing, this object is about to disappear */
}
#endif
/* we only need one of these interface notification objects, all of the sockets dependent upon
* it will wake up when a notification event occurs */
static struct object *get_ifchange( void )
{
#ifdef HAVE_LINUX_RTNETLINK_H
struct ifchange *ifchange;
struct sockaddr_nl addr;
int unix_fd;
if (ifchange_object)
{
/* increment the refcount for each socket that uses the ifchange object */
return grab_object( ifchange_object );
}
/* create the socket we need for processing interface change notifications */
unix_fd = socket( PF_NETLINK, SOCK_RAW, NETLINK_ROUTE );
if (unix_fd == -1)
{
sock_set_error();
return NULL;
}
fcntl( unix_fd, F_SETFL, O_NONBLOCK ); /* make socket nonblocking */
memset( &addr, 0, sizeof(addr) );
addr.nl_family = AF_NETLINK;
addr.nl_groups = RTMGRP_IPV4_IFADDR;
/* bind the socket to the special netlink kernel interface */
if (bind( unix_fd, (struct sockaddr *)&addr, sizeof(addr) ) == -1)
{
close( unix_fd );
sock_set_error();
return NULL;
}
if (!(ifchange = alloc_object( &ifchange_ops )))
{
close( unix_fd );
set_error( STATUS_NO_MEMORY );
return NULL;
}
list_init( &ifchange->sockets );
if (!(ifchange->fd = create_anonymous_fd( &ifchange_fd_ops, unix_fd, &ifchange->obj, 0 )))
{
release_object( ifchange );
set_error( STATUS_NO_MEMORY );
return NULL;
}
set_fd_events( ifchange->fd, POLLIN ); /* enable read wakeup on the file descriptor */
/* the ifchange object is now successfully configured */
ifchange_object = &ifchange->obj;
return &ifchange->obj;
#else
set_error( STATUS_NOT_SUPPORTED );
return NULL;
#endif
}
/* add the socket to the interface change notification list */
static void ifchange_add_sock( struct object *obj, struct sock *sock )
{
#ifdef HAVE_LINUX_RTNETLINK_H
struct ifchange *ifchange = (struct ifchange *)obj;
list_add_tail( &ifchange->sockets, &sock->ifchange_entry );
#endif
}
/* create a new ifchange queue for a specific socket or, if one already exists, reuse the existing one */
static struct async_queue *sock_get_ifchange_q( struct sock *sock )
{
struct object *ifchange;
struct fd *fd;
if (sock->ifchange_q) /* reuse existing ifchange_q for this socket */
return sock->ifchange_q;
if (!(ifchange = get_ifchange()))
return NULL;
/* create the ifchange notification queue */
fd = get_obj_fd( ifchange );
sock->ifchange_q = create_async_queue( fd );
release_object( fd );
if (!sock->ifchange_q)
{
release_object( ifchange );
set_error( STATUS_NO_MEMORY );
return NULL;
}
/* add the socket to the ifchange notification list */
ifchange_add_sock( ifchange, sock );
sock->ifchange_obj = ifchange;
return sock->ifchange_q;
}
/* destroy an existing ifchange queue for a specific socket */
static void sock_destroy_ifchange_q( struct sock *sock )
{
if (sock->ifchange_q)
{
list_remove( &sock->ifchange_entry );
free_async_queue( sock->ifchange_q );
sock->ifchange_q = NULL;
release_object( sock->ifchange_obj );
}
}
/* create a socket */
DECL_HANDLER(create_socket)
{
struct object *obj;
reply->handle = 0;
if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
{
reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
release_object( obj );
}
}
/* accept a socket */
DECL_HANDLER(accept_socket)
{
struct sock *sock;
reply->handle = 0;
if ((sock = accept_socket( req->lhandle )) != NULL)
{
reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
sock->wparam = reply->handle; /* wparam for message is the socket handle */
sock_reselect( sock );
release_object( &sock->obj );
}
}
/* accept a socket into an initialized socket */
DECL_HANDLER(accept_into_socket)
{
struct sock *sock, *acceptsock;
const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
all_attributes, &sock_ops)))
return;
if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
all_attributes, &sock_ops)))
{
release_object( sock );
return;
}
if (accept_into_socket( sock, acceptsock ))
{
acceptsock->wparam = req->ahandle; /* wparam for message is the socket handle */
sock_reselect( acceptsock );
}
release_object( acceptsock );
release_object( sock );
}
/* set socket event parameters */
DECL_HANDLER(set_socket_event)
{
struct sock *sock;
struct event *old_event;
if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
old_event = sock->event;
sock->mask = req->mask;
sock->hmask &= ~req->mask; /* re-enable held events */
sock->event = NULL;
sock->window = req->window;
sock->message = req->msg;
sock->wparam = req->handle; /* wparam is the socket handle */
if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
sock_reselect( sock );
sock->state |= FD_WINE_NONBLOCKING;
/* if a network event is pending, signal the event object
it is possible that FD_CONNECT or FD_ACCEPT network events has happened
before a WSAEventSelect() was done on it.
(when dealing with Asynchronous socket) */
sock_wake_up( sock );
if (old_event) release_object( old_event ); /* we're through with it */
release_object( &sock->obj );
}
/* get socket event parameters */
DECL_HANDLER(get_socket_event)
{
struct sock *sock;
int i;
int errors[FD_MAX_EVENTS];
sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
if (!sock)
{
reply->mask = 0;
reply->pmask = 0;
reply->state = 0;
return;
}
reply->mask = sock->mask;
reply->pmask = sock->pmask;
reply->state = sock->state;
for (i = 0; i < FD_MAX_EVENTS; i++)
errors[i] = sock_get_ntstatus(sock->errors[i]);
set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
if (req->service)
{
if (req->c_event)
{
struct event *cevent = get_event_obj( current->process, req->c_event,
EVENT_MODIFY_STATE );
if (cevent)
{
reset_event( cevent );
release_object( cevent );
}
}
sock->pmask = 0;
sock_reselect( sock );
}
release_object( &sock->obj );
}
/* re-enable pending socket events */
DECL_HANDLER(enable_socket_event)
{
struct sock *sock;
if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
FILE_WRITE_ATTRIBUTES, &sock_ops)))
return;
/* for event-based notification, windows erases stale events */
sock->pmask &= ~req->mask;
sock->hmask &= ~req->mask;
sock->state |= req->sstate;
sock->state &= ~req->cstate;
if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
sock_reselect( sock );
release_object( &sock->obj );
}
DECL_HANDLER(set_socket_deferred)
{
struct sock *sock, *acceptsock;
sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
if ( !sock )
return;
acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
if ( !acceptsock )
{
release_object( sock );
return;
}
sock->deferred = acceptsock;
release_object( sock );
}
DECL_HANDLER(get_socket_info)
{
struct sock *sock;
sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
if (!sock) return;
reply->family = sock->family;
reply->type = sock->type;
reply->protocol = sock->proto;
release_object( &sock->obj );
}
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