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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_SYS_ERRNO_H
# include <sys/errno.h>
#endif
#include <sys/time.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#include <sys/ioctl.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include <time.h>
#include <unistd.h>
#include "winerror.h"
#include "winbase.h"
#include "process.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
#include "user.h"
#include "async.h"
/* To avoid conflicts with the Unix socket headers. Plus we only need a few
* macros anyway.
*/
#define USE_WS_PREFIX
#include "winsock2.h"
struct sock
{
struct object obj; /* object header */
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 */
struct event *event; /* event object */
user_handle_t window; /* window to send the message to */
unsigned int message; /* message to send */
unsigned int wparam; /* message wparam (socket handle) */
int errors[FD_MAX_EVENTS]; /* event errors */
struct async_queue read_q; /* Queue for asynchronous reads */
struct async_queue write_q; /* Queue for asynchronous writes */
};
static void sock_dump( struct object *obj, int verbose );
static int sock_signaled( struct object *obj, struct thread *thread );
static int sock_get_poll_events( struct object *obj );
static void sock_poll_event( struct object *obj, int event );
static int sock_get_fd( struct object *obj );
static int sock_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags );
static void sock_destroy( struct object *obj );
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 */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
sock_signaled, /* signaled */
no_satisfied, /* satisfied */
sock_get_poll_events, /* get_poll_events */
sock_poll_event, /* poll_event */
sock_get_fd, /* get_fd */
no_flush, /* flush */
sock_get_info, /* get_file_info */
NULL, /* queue_async */
sock_destroy /* destroy */
};
/* 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 */
};
static void sock_reselect( struct sock *sock )
{
int ev = sock_get_poll_events( &sock->obj );
if (debug_level)
fprintf(stderr,"sock_reselect(%d): new mask %x\n", sock->obj.fd, ev);
if (sock->obj.select == -1) {
/* previously unconnected socket, is this reselect supposed to connect it? */
if (!(sock->state & ~FD_WINE_NONBLOCKING)) return;
/* ok, it is, attach it to the wineserver's main poll loop */
add_select_user( &sock->obj );
}
/* update condition mask */
set_select_events( &sock->obj, 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 %x\n", events, sock->window );
for (i = 0; i < FD_MAX_EVENTS; i++)
{
int event = event_bitorder[i];
if (sock->pmask & (1 << event))
{
unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
post_message( sock->window, sock->message, sock->wparam, lparam );
}
}
sock->pmask = 0;
sock_reselect( sock );
}
}
inline static int sock_error(int s)
{
unsigned int optval = 0, optlen;
optlen = sizeof(optval);
getsockopt(s, SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
return optval ? sock_get_error(optval) : 0;
}
static void sock_poll_event( struct object *obj, int event )
{
struct sock *sock = (struct sock *)obj;
assert( sock->obj.ops == &sock_ops );
if (debug_level)
fprintf(stderr, "socket %d select event: %x\n", sock->obj.fd, event);
if (sock->state & FD_CONNECT)
{
/* connecting */
if (event & POLLOUT)
{
/* we got connected */
sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
sock->state &= ~FD_CONNECT;
sock->pmask |= FD_CONNECT;
sock->errors[FD_CONNECT_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d connection success\n", sock->obj.fd);
}
else if (event & (POLLERR|POLLHUP))
{
/* we didn't get connected? */
sock->state &= ~FD_CONNECT;
sock->pmask |= FD_CONNECT;
sock->errors[FD_CONNECT_BIT] = sock_error( sock->obj.fd );
if (debug_level)
fprintf(stderr, "socket %d connection failure\n", sock->obj.fd);
}
} else
if (sock->state & FD_WINE_LISTENING)
{
/* listening */
if (event & POLLIN)
{
/* incoming connection */
sock->pmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = 0;
sock->hmask |= FD_ACCEPT;
}
else if (event & (POLLERR|POLLHUP))
{
/* failed incoming connection? */
sock->pmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = sock_error( sock->obj.fd );
sock->hmask |= FD_ACCEPT;
}
} else
{
/* normal data flow */
if (event & POLLIN)
{
char dummy;
/* 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 */
if (!recv( sock->obj.fd, &dummy, 1, MSG_PEEK )) event = POLLHUP;
else
{
/* incoming data */
sock->pmask |= FD_READ;
sock->hmask |= FD_READ;
sock->errors[FD_READ_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d is readable\n", sock->obj.fd );
}
}
if (event & POLLOUT)
{
sock->pmask |= FD_WRITE;
sock->hmask |= FD_WRITE;
sock->errors[FD_WRITE_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d is writable\n", sock->obj.fd);
}
if (event & POLLPRI)
{
sock->pmask |= FD_OOB;
sock->hmask |= FD_OOB;
sock->errors[FD_OOB_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d got OOB data\n", sock->obj.fd);
}
if (((event & POLLERR) || ((event & (POLLIN|POLLHUP)) == POLLHUP))
&& (sock->state & (FD_READ|FD_WRITE))) {
/* socket closing */
sock->errors[FD_CLOSE_BIT] = sock_error( sock->obj.fd );
sock->state &= ~(FD_WINE_CONNECTED|FD_READ|FD_WRITE);
sock->pmask |= FD_CLOSE;
if (debug_level)
fprintf(stderr, "socket %d aborted by error %d\n",
sock->obj.fd, sock->errors[FD_CLOSE_BIT]);
}
}
if (event & (POLLERR|POLLHUP))
set_select_events( &sock->obj, -1 );
else
sock_reselect( sock );
/* wake up anyone waiting for whatever just happened */
if (sock->pmask & sock->mask) sock_wake_up( sock );
/* 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 );
}
static void sock_dump( struct object *obj, int verbose )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
printf( "Socket fd=%d, state=%x, mask=%x, pending=%x, held=%x\n",
sock->obj.fd, sock->state,
sock->mask, sock->pmask, sock->hmask );
}
static int sock_signaled( struct object *obj, struct thread *thread )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
return check_select_events( sock->obj.fd, sock_get_poll_events( &sock->obj ) );
}
static int sock_get_poll_events( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
unsigned int mask = sock->mask & sock->state & ~sock->hmask;
int ev = 0;
assert( obj->ops == &sock_ops );
if (sock->state & FD_CONNECT)
/* connecting, wait for writable */
return POLLOUT;
if (sock->state & FD_WINE_LISTENING)
/* listening, wait for readable */
return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
if (mask & FD_READ) ev |= POLLIN | POLLPRI;
if (mask & FD_WRITE) ev |= POLLOUT;
return ev;
}
static int sock_get_fd( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
return sock->obj.fd;
}
static int sock_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags )
{
struct sock *sock = (struct sock*) obj;
assert ( obj->ops == &sock_ops );
if (reply)
{
reply->type = FILE_TYPE_PIPE;
reply->attr = 0;
reply->access_time = 0;
reply->write_time = 0;
reply->size_high = 0;
reply->size_low = 0;
reply->links = 0;
reply->index_high = 0;
reply->index_low = 0;
reply->serial = 0;
}
*flags = 0;
if (sock->flags & WSA_FLAG_OVERLAPPED) *flags |= FD_FLAG_OVERLAPPED;
return FD_TYPE_DEFAULT;
}
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->flags & WSA_FLAG_OVERLAPPED )
{
destroy_async_queue ( &sock->read_q );
destroy_async_queue ( &sock->write_q );
}
if (sock->event) release_object( sock->event );
}
/* 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, -1 ))) return NULL;
sock->obj.fd = sockfd;
sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
sock->mask = 0;
sock->hmask = 0;
sock->pmask = 0;
sock->flags = flags;
sock->event = NULL;
sock->window = 0;
sock->message = 0;
sock->wparam = 0;
sock_reselect( sock );
clear_error();
if (sock->flags & WSA_FLAG_OVERLAPPED)
{
init_async_queue (&sock->read_q);
init_async_queue (&sock->write_q);
}
return &sock->obj;
}
/* accept a socket (creates a new fd) */
static struct sock *accept_socket( handle_t handle )
{
struct sock *acceptsock;
struct sock *sock;
int acceptfd;
struct sockaddr saddr;
int slen;
sock=(struct sock*)get_handle_obj(current->process,handle,
GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
if (!sock)
return NULL;
/* 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.
*/
slen = sizeof(saddr);
acceptfd = accept(sock->obj.fd,&saddr,&slen);
if (acceptfd==-1) {
sock_set_error();
release_object( sock );
return NULL;
}
if (!(acceptsock = alloc_object( &sock_ops, -1 )))
{
release_object( sock );
return NULL;
}
/* newly created socket gets the same properties of the listening socket */
fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
acceptsock->obj.fd = acceptfd;
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->hmask = 0;
acceptsock->pmask = 0;
acceptsock->event = NULL;
acceptsock->window = sock->window;
acceptsock->message = sock->message;
acceptsock->wparam = 0;
if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
acceptsock->flags = sock->flags;
if ( acceptsock->flags & WSA_FLAG_OVERLAPPED )
{
init_async_queue ( &acceptsock->read_q );
init_async_queue ( &acceptsock->write_q );
}
clear_error();
sock->pmask &= ~FD_ACCEPT;
sock->hmask &= ~FD_ACCEPT;
sock_reselect( sock );
release_object( sock );
return acceptsock;
}
/* set the last error depending on errno */
static int sock_get_error( int err )
{
switch (err)
{
case EINTR: return WSAEINTR; break;
case EBADF: return WSAEBADF; break;
case EPERM:
case EACCES: return WSAEACCES; break;
case EFAULT: return WSAEFAULT; break;
case EINVAL: return WSAEINVAL; break;
case EMFILE: return WSAEMFILE; break;
case EWOULDBLOCK: return WSAEWOULDBLOCK; break;
case EINPROGRESS: return WSAEINPROGRESS; break;
case EALREADY: return WSAEALREADY; break;
case ENOTSOCK: return WSAENOTSOCK; break;
case EDESTADDRREQ: return WSAEDESTADDRREQ; break;
case EMSGSIZE: return WSAEMSGSIZE; break;
case EPROTOTYPE: return WSAEPROTOTYPE; break;
case ENOPROTOOPT: return WSAENOPROTOOPT; break;
case EPROTONOSUPPORT: return WSAEPROTONOSUPPORT; break;
case ESOCKTNOSUPPORT: return WSAESOCKTNOSUPPORT; break;
case EOPNOTSUPP: return WSAEOPNOTSUPP; break;
case EPFNOSUPPORT: return WSAEPFNOSUPPORT; break;
case EAFNOSUPPORT: return WSAEAFNOSUPPORT; break;
case EADDRINUSE: return WSAEADDRINUSE; break;
case EADDRNOTAVAIL: return WSAEADDRNOTAVAIL; break;
case ENETDOWN: return WSAENETDOWN; break;
case ENETUNREACH: return WSAENETUNREACH; break;
case ENETRESET: return WSAENETRESET; break;
case ECONNABORTED: return WSAECONNABORTED; break;
case EPIPE:
case ECONNRESET: return WSAECONNRESET; break;
case ENOBUFS: return WSAENOBUFS; break;
case EISCONN: return WSAEISCONN; break;
case ENOTCONN: return WSAENOTCONN; break;
case ESHUTDOWN: return WSAESHUTDOWN; break;
case ETOOMANYREFS: return WSAETOOMANYREFS; break;
case ETIMEDOUT: return WSAETIMEDOUT; break;
case ECONNREFUSED: return WSAECONNREFUSED; break;
case ELOOP: return WSAELOOP; break;
case ENAMETOOLONG: return WSAENAMETOOLONG; break;
case EHOSTDOWN: return WSAEHOSTDOWN; break;
case EHOSTUNREACH: return WSAEHOSTUNREACH; break;
case ENOTEMPTY: return WSAENOTEMPTY; break;
#ifdef EPROCLIM
case EPROCLIM: return WSAEPROCLIM; break;
#endif
#ifdef EUSERS
case EUSERS: return WSAEUSERS; break;
#endif
#ifdef EDQUOT
case EDQUOT: return WSAEDQUOT; break;
#endif
#ifdef ESTALE
case ESTALE: return WSAESTALE; break;
#endif
#ifdef EREMOTE
case EREMOTE: return WSAEREMOTE; break;
#endif
default: errno=err; perror("sock_set_error"); return ERROR_UNKNOWN; break;
}
}
/* set the last error depending on errno */
static void sock_set_error(void)
{
set_error( sock_get_error( errno ) );
}
/* 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->inherit );
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->inherit );
sock->wparam = reply->handle; /* wparam for message is the socket handle */
sock_reselect( sock );
release_object( &sock->obj );
}
}
/* 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,
GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
return;
old_event = sock->event;
sock->mask = req->mask;
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 );
if (sock->mask)
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) */
if (sock->pmask & sock->mask) 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;
sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
if (!sock)
{
reply->mask = 0;
reply->pmask = 0;
reply->state = 0;
set_error( WSAENOTSOCK );
return;
}
reply->mask = sock->mask;
reply->pmask = sock->pmask;
reply->state = sock->state;
set_reply_data( sock->errors, min( get_reply_max_size(), sizeof(sock->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,
GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
return;
sock->pmask &= ~req->mask; /* is this safe? */
sock->hmask &= ~req->mask;
sock->state |= req->sstate;
sock->state &= ~req->cstate;
sock_reselect( sock );
release_object( &sock->obj );
}
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