Sweden-Number/server/sock.c

594 lines
19 KiB
C
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/*
* Server-side socket management
*
* Copyright (C) 1999 Marcus Meissner, Ove K<EFBFBD>ven
*
* FIXME: we use read|write access in all cases. Shouldn't we depend that
* on the access of the current handle?
*/
#include "config.h"
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#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
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#include <sys/time.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
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#include <sys/ioctl.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
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#include <time.h>
#include <unistd.h>
#include "winerror.h"
#include "winbase.h"
#include "process.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
/* To avoid conflicts with the Unix socket headers. Plus we only need a few
* macros anyway.
*/
#define USE_WS_PREFIX
#include "winsock2.h"
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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 */
struct event *event; /* event object */
int errors[FD_MAX_EVENTS]; /* event errors */
};
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 );
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static int sock_get_fd( struct object *obj );
static int sock_get_info( struct object *obj, struct get_file_info_reply *reply );
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static void sock_destroy( struct object *obj );
static int sock_get_error( int err );
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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 */
sock_destroy /* destroy */
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};
static void sock_reselect( struct sock *sock )
{
int ev = sock_get_poll_events( &sock->obj );
struct pollfd pfd;
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 );
/* check whether condition is satisfied already */
pfd.fd = sock->obj.fd;
pfd.events = ev;
pfd.revents = 0;
poll( &pfd, 1, 0 );
if (pfd.revents)
sock_poll_event( &sock->obj, pfd.revents);
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}
inline static int sock_error(int s)
{
unsigned int optval = 0, optlen;
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optlen = sizeof(optval);
getsockopt(s, SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
return optval ? sock_get_error(optval) : 0;
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}
static void sock_poll_event( struct object *obj, int event )
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{
struct sock *sock = (struct sock *)obj;
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unsigned int emask;
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)
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{
/* connecting */
if (event & POLLOUT)
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{
/* we got connected */
sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
sock->state &= ~FD_CONNECT;
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sock->pmask |= FD_CONNECT;
sock->errors[FD_CONNECT_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d connection success\n", sock->obj.fd);
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}
else if (event & (POLLERR|POLLHUP))
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{
/* we didn't get connected? */
sock->state &= ~FD_CONNECT;
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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);
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}
} else
if (sock->state & FD_WINE_LISTENING)
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{
/* listening */
if (event & POLLIN)
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{
/* incoming connection */
sock->pmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = 0;
sock->hmask |= FD_ACCEPT;
}
else if (event & (POLLERR|POLLHUP))
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{
/* failed incoming connection? */
sock->pmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = sock_error( sock->obj.fd );
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sock->hmask |= FD_ACCEPT;
}
} else
{
/* normal data flow */
if (event & POLLIN)
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{
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 );
}
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}
if (event & POLLOUT)
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{
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);
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}
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]);
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}
}
if (event & (POLLERR|POLLHUP))
set_select_events( &sock->obj, -1 );
else
sock_reselect( sock );
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/* wake up anyone waiting for whatever just happened */
emask = sock->pmask & sock->mask;
if (debug_level && emask)
fprintf(stderr, "socket %d pending events: %x\n", sock->obj.fd, emask);
if (emask && sock->event) {
if (debug_level) fprintf(stderr, "signalling event ptr %p\n", sock->event);
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set_event(sock->event);
}
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/* 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 );
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}
static int sock_signaled( struct object *obj, struct thread *thread )
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{
struct sock *sock = (struct sock *)obj;
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assert( obj->ops == &sock_ops );
return check_select_events( sock->obj.fd, sock_get_poll_events( &sock->obj ) );
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}
static int sock_get_poll_events( struct object *obj )
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{
struct sock *sock = (struct sock *)obj;
unsigned int mask = sock->mask & sock->state & ~sock->hmask;
int ev = 0;
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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;
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}
static int sock_get_fd( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
return sock->obj.fd;
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}
static int sock_get_info( struct object *obj, struct get_file_info_reply *reply )
{
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;
}
return FD_TYPE_DEFAULT;
}
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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->event)
{
/* if the service thread was waiting for the event object,
* we should now signal it, to let the service thread
* object detect that it is now orphaned... */
if (sock->mask & FD_WINE_SERVEVENT)
set_event( sock->event );
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/* we're through with it */
release_object( sock->event );
}
}
/* create a new and unconnected socket */
static struct object *create_socket( int family, int type, int protocol )
{
struct sock *sock;
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int sockfd;
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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->event = NULL;
sock_reselect( sock );
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clear_error();
return &sock->obj;
}
/* accept a socket (creates a new fd) */
static struct object *accept_socket( handle_t handle )
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{
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);
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if (acceptfd==-1) {
sock_set_error();
release_object( sock );
return NULL;
}
if (!(acceptsock = alloc_object( &sock_ops, -1 )))
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{
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;
if (sock->event && !(sock->mask & FD_WINE_SERVEVENT))
acceptsock->event = (struct event *)grab_object( sock->event );
sock_reselect( acceptsock );
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clear_error();
sock->pmask &= ~FD_ACCEPT;
sock->hmask &= ~FD_ACCEPT;
sock_reselect( sock );
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release_object( sock );
return &acceptsock->obj;
}
/* set the last error depending on errno */
static int sock_get_error( int err )
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{
switch (err)
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{
case EINTR: return WSAEINTR; break;
case EBADF: return WSAEBADF; break;
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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;
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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;
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#ifdef EPROCLIM
case EPROCLIM: return WSAEPROCLIM; break;
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#endif
#ifdef EUSERS
case EUSERS: return WSAEUSERS; break;
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#endif
#ifdef EDQUOT
case EDQUOT: return WSAEDQUOT; break;
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#endif
#ifdef ESTALE
case ESTALE: return WSAESTALE; break;
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#endif
#ifdef EREMOTE
case EREMOTE: return WSAEREMOTE; break;
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#endif
default: errno=err; perror("sock_set_error"); return ERROR_UNKNOWN; break;
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}
}
/* set the last error depending on errno */
static void sock_set_error(void)
{
set_error( sock_get_error( errno ) );
}
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/* create a socket */
DECL_HANDLER(create_socket)
{
struct object *obj;
reply->handle = 0;
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if ((obj = create_socket( req->family, req->type, req->protocol )) != NULL)
{
reply->handle = alloc_handle( current->process, obj, req->access, req->inherit );
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release_object( obj );
}
}
/* accept a socket */
DECL_HANDLER(accept_socket)
{
struct object *obj;
reply->handle = 0;
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if ((obj = accept_socket( req->lhandle )) != NULL)
{
reply->handle = alloc_handle( current->process, obj, req->access, req->inherit );
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release_object( obj );
}
}
/* set socket event parameters */
DECL_HANDLER(set_socket_event)
{
struct sock *sock;
struct event *oevent;
unsigned int omask;
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sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
if (!sock)
return;
oevent = sock->event;
omask = sock->mask;
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sock->mask = req->mask;
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);
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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)
set_event(sock->event);
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if (oevent)
{
if ((oevent != sock->event) && (omask & FD_WINE_SERVEVENT))
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/* if the service thread was waiting for the old event object,
* we should now signal it, to let the service thread
* object detect that it is now orphaned... */
set_event( oevent );
/* we're through with it */
release_object( oevent );
}
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;
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}
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) ));
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if (req->service)
{
handle_t s_event = req->s_event;
if (s_event)
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{
struct event *sevent = get_event_obj(current->process, req->s_event, 0);
if (sevent == sock->event) s_event = 0;
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release_object( sevent );
}
if (!s_event)
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{
if (req->c_event)
{
struct event *cevent = get_event_obj(current->process, req->c_event, EVENT_MODIFY_STATE);
reset_event( cevent );
release_object( cevent );
}
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sock->pmask = 0;
sock_reselect( sock );
}
else set_error(WSAEINVAL);
}
release_object( &sock->obj );
}
/* re-enable pending socket events */
DECL_HANDLER(enable_socket_event)
{
struct sock *sock;
sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
if (!sock)
return;
sock->pmask &= ~req->mask; /* is this safe? */
sock->hmask &= ~req->mask;
sock->state |= req->sstate;
sock->state &= ~req->cstate;
sock_reselect( sock );
/* service trigger */
if (req->mask & FD_WINE_SERVEVENT)
{
sock->pmask |= FD_WINE_SERVEVENT;
if (sock->event) {
if (debug_level) fprintf(stderr, "signalling service event ptr %p\n", sock->event);
set_event(sock->event);
}
}
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release_object( &sock->obj );
}