Sweden-Number/server/sock.c

556 lines
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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/stat.h>
#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 "winsock2.h"
#include "process.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
struct sock
{
struct object obj; /* object header */
struct select_user select; /* select user */
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_add_queue( struct object *obj, struct wait_queue_entry *entry );
static void sock_remove_queue( struct object *obj, struct wait_queue_entry *entry );
static int sock_signaled( struct object *obj, struct thread *thread );
static int sock_get_fd( struct object *obj );
static void sock_destroy( struct object *obj );
static void sock_set_error(void);
static const struct object_ops sock_ops =
{
sizeof(struct sock),
sock_dump,
sock_add_queue,
sock_remove_queue,
sock_signaled,
no_satisfied,
sock_get_fd,
sock_get_fd,
no_flush,
no_get_file_info,
sock_destroy
};
static int sock_event( struct sock *sock )
{
unsigned int mask = sock->mask & sock->state & ~sock->hmask;
int ev = EXCEPT_EVENT;
if (sock->state & WS_FD_CONNECT)
/* connecting, wait for writable */
return WRITE_EVENT | EXCEPT_EVENT;
if (sock->state & WS_FD_LISTENING)
/* listening, wait for readable */
return ((sock->hmask & FD_ACCEPT) ? 0 : READ_EVENT) | EXCEPT_EVENT;
if (mask & FD_READ) ev |= READ_EVENT;
if (mask & FD_WRITE) ev |= WRITE_EVENT;
return ev;
}
static void sock_reselect( struct sock *sock )
{
int ev = sock_event( sock );
if (debug_level)
fprintf(stderr,"sock_reselect(%d): new mask %x\n", sock->select.fd, ev);
set_select_events( &sock->select, ev );
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}
inline static int sock_error(int s)
{
unsigned int optval, optlen;
optlen = sizeof(optval);
getsockopt(s, SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
return optval;
}
static void sock_select_event( int event, void *private )
{
struct sock *sock = (struct sock *)private;
unsigned int emask;
assert( sock->obj.ops == &sock_ops );
if (debug_level)
fprintf(stderr, "socket %d select event: %x\n", sock->select.fd, event);
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if (sock->state & WS_FD_CONNECT)
{
/* connecting */
if (event & WRITE_EVENT)
{
/* we got connected */
sock->state |= WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE;
sock->state &= ~WS_FD_CONNECT;
sock->pmask |= FD_CONNECT;
sock->errors[FD_CONNECT_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d connection success\n", sock->select.fd);
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}
else if (event & EXCEPT_EVENT)
{
/* we didn't get connected? */
sock->state &= ~WS_FD_CONNECT;
sock->pmask |= FD_CONNECT;
sock->errors[FD_CONNECT_BIT] = sock_error( sock->select.fd );
if (debug_level)
fprintf(stderr, "socket %d connection failure\n", sock->select.fd);
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}
} else
if (sock->state & WS_FD_LISTENING)
{
/* listening */
if (event & READ_EVENT)
{
/* incoming connection */
sock->pmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = 0;
sock->hmask |= FD_ACCEPT;
}
else if (event & EXCEPT_EVENT)
{
/* failed incoming connection? */
sock->pmask |= FD_ACCEPT;
sock->errors[FD_ACCEPT_BIT] = sock_error( sock->select.fd );
sock->hmask |= FD_ACCEPT;
}
} else
{
/* normal data flow */
if (event & READ_EVENT)
{
/* make sure there's data here */
int bytes = 0;
ioctl(sock->select.fd, FIONREAD, (char*)&bytes);
if (bytes)
{
/* incoming data */
sock->pmask |= FD_READ;
sock->hmask |= FD_READ;
sock->errors[FD_READ_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d has %d bytes\n", sock->select.fd, bytes);
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}
else
{
/* 0 bytes readable == socket closed cleanly */
sock->state &= ~(WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE);
sock->pmask |= FD_CLOSE;
sock->errors[FD_CLOSE_BIT] = 0;
if (debug_level)
fprintf(stderr, "socket %d is closing\n", sock->select.fd);
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}
}
if (event & WRITE_EVENT)
{
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->select.fd);
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}
if (event & EXCEPT_EVENT)
{
sock->errors[FD_CLOSE_BIT] = sock_error( sock->select.fd );
if (sock->errors[FD_CLOSE_BIT])
{
/* we got an error, socket closing? */
sock->state &= ~(WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE);
sock->pmask |= FD_CLOSE;
if (debug_level)
fprintf(stderr, "socket %d aborted by error %d\n", sock->select.fd, sock->errors[FD_CLOSE_BIT]);
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}
else
{
/* no error, OOB data? */
sock->pmask |= FD_OOB;
sock->hmask |= FD_OOB;
if (debug_level)
fprintf(stderr, "socket %d got OOB data\n", sock->select.fd);
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}
}
}
sock_reselect( sock );
/* 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->select.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->select.fd, sock->state,
sock->mask, sock->pmask, sock->hmask );
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}
static int sock_add_queue( struct object *obj, struct wait_queue_entry *entry )
{
/* struct sock *sock = (struct sock *)obj; */
assert( obj->ops == &sock_ops );
add_queue( obj, entry );
return 1;
}
static void sock_remove_queue( struct object *obj, struct wait_queue_entry *entry )
{
/* struct sock *sock = (struct sock *)grab_object(obj); */
assert( obj->ops == &sock_ops );
remove_queue( obj, entry );
/* release_object( obj ); */
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}
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->select, sock_event( sock ) );
}
static int sock_get_fd( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
int fd;
assert( obj->ops == &sock_ops );
fd = dup( sock->select.fd );
if (fd==-1)
sock_set_error();
return fd;
}
static void sock_destroy( struct object *obj )
{
struct sock *sock = (struct sock *)obj;
assert( obj->ops == &sock_ops );
unregister_select_user( &sock->select );
/* FIXME: special socket shutdown stuff? */
close( sock->select.fd );
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 & WS_FD_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 ))) {
close( sockfd );
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return NULL;
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}
sock->select.fd = sockfd;
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sock->select.func = sock_select_event;
sock->select.private = sock;
sock->state = (type!=SOCK_STREAM) ? WS_FD_READ|WS_FD_WRITE : 0;
sock->mask = 0;
sock->hmask = 0;
sock->pmask = 0;
sock->event = NULL;
register_select_user( &sock->select );
sock_reselect( sock );
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clear_error();
return &sock->obj;
}
/* accept a socket (creates a new fd) */
static struct object *accept_socket( int 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->select.fd,&saddr,&slen);
if (acceptfd==-1) {
sock_set_error();
release_object( sock );
return NULL;
}
if (!(acceptsock = alloc_object( &sock_ops )))
{
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close( acceptfd );
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release_object( sock );
return NULL;
}
acceptsock->select.fd = acceptfd;
acceptsock->select.func = sock_select_event;
acceptsock->select.private = acceptsock;
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acceptsock->state = WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE;
acceptsock->mask = sock->mask;
acceptsock->hmask = 0;
acceptsock->pmask = 0;
if (sock->event)
acceptsock->event = (struct event *)grab_object( sock->event );
else
acceptsock->event = NULL;
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register_select_user( &acceptsock->select );
sock_reselect( acceptsock );
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clear_error();
sock->pmask &= ~FD_ACCEPT;
sock->hmask &= ~FD_ACCEPT;
release_object( sock );
return &acceptsock->obj;
}
/* set the last error depending on errno */
static void sock_set_error(void)
{
switch (errno)
{
case EINTR: set_error(WSAEINTR);break;
case EBADF: set_error(WSAEBADF);break;
case EPERM:
case EACCES: set_error(WSAEACCES);break;
case EFAULT: set_error(WSAEFAULT);break;
case EINVAL: set_error(WSAEINVAL);break;
case EMFILE: set_error(WSAEMFILE);break;
case EWOULDBLOCK: set_error(WSAEWOULDBLOCK);break;
case EINPROGRESS: set_error(WSAEINPROGRESS);break;
case EALREADY: set_error(WSAEALREADY);break;
case ENOTSOCK: set_error(WSAENOTSOCK);break;
case EDESTADDRREQ: set_error(WSAEDESTADDRREQ);break;
case EMSGSIZE: set_error(WSAEMSGSIZE);break;
case EPROTOTYPE: set_error(WSAEPROTOTYPE);break;
case ENOPROTOOPT: set_error(WSAENOPROTOOPT);break;
case EPROTONOSUPPORT: set_error(WSAEPROTONOSUPPORT);break;
case ESOCKTNOSUPPORT: set_error(WSAESOCKTNOSUPPORT);break;
case EOPNOTSUPP: set_error(WSAEOPNOTSUPP);break;
case EPFNOSUPPORT: set_error(WSAEPFNOSUPPORT);break;
case EAFNOSUPPORT: set_error(WSAEAFNOSUPPORT);break;
case EADDRINUSE: set_error(WSAEADDRINUSE);break;
case EADDRNOTAVAIL: set_error(WSAEADDRNOTAVAIL);break;
case ENETDOWN: set_error(WSAENETDOWN);break;
case ENETUNREACH: set_error(WSAENETUNREACH);break;
case ENETRESET: set_error(WSAENETRESET);break;
case ECONNABORTED: set_error(WSAECONNABORTED);break;
case EPIPE:
case ECONNRESET: set_error(WSAECONNRESET);break;
case ENOBUFS: set_error(WSAENOBUFS);break;
case EISCONN: set_error(WSAEISCONN);break;
case ENOTCONN: set_error(WSAENOTCONN);break;
case ESHUTDOWN: set_error(WSAESHUTDOWN);break;
case ETOOMANYREFS: set_error(WSAETOOMANYREFS);break;
case ETIMEDOUT: set_error(WSAETIMEDOUT);break;
case ECONNREFUSED: set_error(WSAECONNREFUSED);break;
case ELOOP: set_error(WSAELOOP);break;
case ENAMETOOLONG: set_error(WSAENAMETOOLONG);break;
case EHOSTDOWN: set_error(WSAEHOSTDOWN);break;
case EHOSTUNREACH: set_error(WSAEHOSTUNREACH);break;
case ENOTEMPTY: set_error(WSAENOTEMPTY);break;
#ifdef EPROCLIM
case EPROCLIM: set_error(WSAEPROCLIM);break;
#endif
#ifdef EUSERS
case EUSERS: set_error(WSAEUSERS);break;
#endif
#ifdef EDQUOT
case EDQUOT: set_error(WSAEDQUOT);break;
#endif
#ifdef ESTALE
case ESTALE: set_error(WSAESTALE);break;
#endif
#ifdef EREMOTE
case EREMOTE: set_error(WSAEREMOTE);break;
#endif
default: perror("sock_set_error"); set_error( ERROR_UNKNOWN ); break;
}
}
/* create a socket */
DECL_HANDLER(create_socket)
{
struct object *obj;
int s = -1;
if ((obj = create_socket( req->family, req->type, req->protocol )) != NULL)
{
s = alloc_handle( current->process, obj, req->access, req->inherit );
release_object( obj );
}
req->handle = s;
}
/* accept a socket */
DECL_HANDLER(accept_socket)
{
struct object *obj;
int s = -1;
if ((obj = accept_socket( req->lhandle )) != NULL)
{
s = alloc_handle( current->process, obj, req->access, req->inherit );
release_object( obj );
}
req->handle = s;
}
/* 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 |= WS_FD_NONBLOCKING;
if (oevent)
{
if ((oevent != sock->event) && (omask & WS_FD_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)
{
req->mask = 0;
req->pmask = 0;
req->state = 0;
set_error(WSAENOTSOCK);
return;
}
req->mask = sock->mask;
req->pmask = sock->pmask;
req->state = sock->state;
memcpy(req->errors, sock->errors, sizeof(sock->errors));
clear_error();
if (req->service)
{
if (req->s_event)
{
struct event *sevent = get_event_obj(current->process, req->s_event, 0);
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if (sevent == sock->event)
req->s_event = 0;
release_object( sevent );
}
if (!req->s_event)
{
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 );
release_object( &sock->obj );
}