2 * Server-side socket management
4 * Copyright (C) 1999 Marcus Meissner, Ove Kåven
6 * FIXME: we use read|write access in all cases. Shouldn't we depend that
7 * on the access of the current handle?
18 #ifdef HAVE_SYS_ERRNO_H
19 # include <sys/errno.h>
23 #include <sys/types.h>
24 #ifdef HAVE_SYS_SOCKET_H
25 # include <sys/socket.h>
27 #include <sys/ioctl.h>
28 #ifdef HAVE_SYS_FILIO_H
29 # include <sys/filio.h>
44 struct object obj; /* object header */
45 unsigned int state; /* status bits */
46 unsigned int mask; /* event mask */
47 unsigned int hmask; /* held (blocked) events */
48 unsigned int pmask; /* pending events */
49 struct event *event; /* event object */
50 int errors[FD_MAX_EVENTS]; /* event errors */
53 static void sock_dump( struct object *obj, int verbose );
54 static int sock_signaled( struct object *obj, struct thread *thread );
55 static int sock_get_poll_events( struct object *obj );
56 static void sock_poll_event( struct object *obj, int event );
57 static int sock_get_fd( struct object *obj );
58 static void sock_destroy( struct object *obj );
59 static int sock_get_error( int err );
60 static void sock_set_error(void);
62 static const struct object_ops sock_ops =
64 sizeof(struct sock), /* size */
66 add_queue, /* add_queue */
67 remove_queue, /* remove_queue */
68 sock_signaled, /* signaled */
69 no_satisfied, /* satisfied */
70 sock_get_poll_events, /* get_poll_events */
71 sock_poll_event, /* poll_event */
72 sock_get_fd, /* get_read_fd */
73 sock_get_fd, /* get_write_fd */
75 no_get_file_info, /* get_file_info */
76 sock_destroy /* destroy */
79 static void sock_reselect( struct sock *sock )
81 int ev = sock_get_poll_events( &sock->obj );
85 fprintf(stderr,"sock_reselect(%d): new mask %x\n", sock->obj.fd, ev);
86 set_select_events( &sock->obj, ev );
88 /* check whether condition is satisfied already */
89 pfd.fd = sock->obj.fd;
94 sock_poll_event( &sock->obj, pfd.revents);
97 inline static int sock_error(int s)
99 unsigned int optval = 0, optlen;
101 optlen = sizeof(optval);
102 getsockopt(s, SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
103 return optval ? sock_get_error(optval) : 0;
106 static void sock_poll_event( struct object *obj, int event )
108 struct sock *sock = (struct sock *)obj;
110 assert( sock->obj.ops == &sock_ops );
112 fprintf(stderr, "socket %d select event: %x\n", sock->obj.fd, event);
113 if (sock->state & WS_FD_CONNECT)
118 /* we got connected */
119 sock->state |= WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE;
120 sock->state &= ~WS_FD_CONNECT;
121 sock->pmask |= FD_CONNECT;
122 sock->errors[FD_CONNECT_BIT] = 0;
124 fprintf(stderr, "socket %d connection success\n", sock->obj.fd);
126 else if (event & (POLLERR|POLLHUP))
128 /* we didn't get connected? */
129 sock->state &= ~WS_FD_CONNECT;
130 sock->pmask |= FD_CONNECT;
131 sock->errors[FD_CONNECT_BIT] = sock_error( sock->obj.fd );
133 fprintf(stderr, "socket %d connection failure\n", sock->obj.fd);
136 if (sock->state & WS_FD_LISTENING)
141 /* incoming connection */
142 sock->pmask |= FD_ACCEPT;
143 sock->errors[FD_ACCEPT_BIT] = 0;
144 sock->hmask |= FD_ACCEPT;
146 else if (event & (POLLERR|POLLHUP))
148 /* failed incoming connection? */
149 sock->pmask |= FD_ACCEPT;
150 sock->errors[FD_ACCEPT_BIT] = sock_error( sock->obj.fd );
151 sock->hmask |= FD_ACCEPT;
155 /* normal data flow */
159 sock->pmask |= FD_READ;
160 sock->hmask |= FD_READ;
161 sock->errors[FD_READ_BIT] = 0;
163 fprintf(stderr, "socket %d is readable\n", sock->obj.fd );
167 sock->pmask |= FD_WRITE;
168 sock->hmask |= FD_WRITE;
169 sock->errors[FD_WRITE_BIT] = 0;
171 fprintf(stderr, "socket %d is writable\n", sock->obj.fd);
175 sock->pmask |= FD_OOB;
176 sock->hmask |= FD_OOB;
177 sock->errors[FD_OOB_BIT] = 0;
179 fprintf(stderr, "socket %d got OOB data\n", sock->obj.fd);
181 if (((event & POLLERR) || ((event & (POLLIN|POLLHUP)) == POLLHUP))
182 && (sock->state & (WS_FD_READ|WS_FD_WRITE))) {
184 sock->errors[FD_CLOSE_BIT] = sock_error( sock->obj.fd );
185 sock->state &= ~(WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE);
186 sock->pmask |= FD_CLOSE;
188 fprintf(stderr, "socket %d aborted by error %d\n",
189 sock->obj.fd, sock->errors[FD_CLOSE_BIT]);
193 if (event & (POLLERR|POLLHUP))
194 set_select_events( &sock->obj, -1 );
196 sock_reselect( sock );
197 /* wake up anyone waiting for whatever just happened */
198 emask = sock->pmask & sock->mask;
199 if (debug_level && emask)
200 fprintf(stderr, "socket %d pending events: %x\n", sock->obj.fd, emask);
201 if (emask && sock->event) {
202 if (debug_level) fprintf(stderr, "signalling event ptr %p\n", sock->event);
203 set_event(sock->event);
206 /* if anyone is stupid enough to wait on the socket object itself,
207 * maybe we should wake them up too, just in case? */
208 wake_up( &sock->obj, 0 );
211 static void sock_dump( struct object *obj, int verbose )
213 struct sock *sock = (struct sock *)obj;
214 assert( obj->ops == &sock_ops );
215 printf( "Socket fd=%d, state=%x, mask=%x, pending=%x, held=%x\n",
216 sock->obj.fd, sock->state,
217 sock->mask, sock->pmask, sock->hmask );
220 static int sock_signaled( struct object *obj, struct thread *thread )
222 struct sock *sock = (struct sock *)obj;
223 assert( obj->ops == &sock_ops );
225 return check_select_events( sock->obj.fd, sock_get_poll_events( &sock->obj ) );
228 static int sock_get_poll_events( struct object *obj )
230 struct sock *sock = (struct sock *)obj;
231 unsigned int mask = sock->mask & sock->state & ~sock->hmask;
234 assert( obj->ops == &sock_ops );
236 if (sock->state & WS_FD_CONNECT)
237 /* connecting, wait for writable */
239 if (sock->state & WS_FD_LISTENING)
240 /* listening, wait for readable */
241 return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
243 if (mask & FD_READ) ev |= POLLIN | POLLPRI;
244 if (mask & FD_WRITE) ev |= POLLOUT;
248 static int sock_get_fd( struct object *obj )
250 struct sock *sock = (struct sock *)obj;
252 assert( obj->ops == &sock_ops );
253 fd = dup( sock->obj.fd );
259 static void sock_destroy( struct object *obj )
261 struct sock *sock = (struct sock *)obj;
262 assert( obj->ops == &sock_ops );
264 /* FIXME: special socket shutdown stuff? */
267 /* if the service thread was waiting for the event object,
268 * we should now signal it, to let the service thread
269 * object detect that it is now orphaned... */
270 if (sock->mask & WS_FD_SERVEVENT)
271 set_event( sock->event );
272 /* we're through with it */
273 release_object( sock->event );
277 /* create a new and unconnected socket */
278 static struct object *create_socket( int family, int type, int protocol )
283 sockfd = socket( family, type, protocol );
285 fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
290 fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
291 if (!(sock = alloc_object( &sock_ops, sockfd ))) return NULL;
292 sock->state = (type!=SOCK_STREAM) ? WS_FD_READ|WS_FD_WRITE : 0;
297 sock_reselect( sock );
302 /* accept a socket (creates a new fd) */
303 static struct object *accept_socket( int handle )
305 struct sock *acceptsock;
308 struct sockaddr saddr;
311 sock=(struct sock*)get_handle_obj(current->process,handle,
312 GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
315 /* Try to accept(2). We can't be safe that this an already connected socket
316 * or that accept() is allowed on it. In those cases we will get -1/errno
319 slen = sizeof(saddr);
320 acceptfd = accept(sock->obj.fd,&saddr,&slen);
323 release_object( sock );
326 if (!(acceptsock = alloc_object( &sock_ops, acceptfd )))
328 release_object( sock );
332 acceptsock->state = WS_FD_CONNECTED|WS_FD_READ|WS_FD_WRITE;
333 acceptsock->mask = sock->mask;
334 acceptsock->hmask = 0;
335 acceptsock->pmask = 0;
336 acceptsock->event = NULL;
337 if (sock->event && !(sock->mask & WS_FD_SERVEVENT))
338 acceptsock->event = (struct event *)grab_object( sock->event );
340 sock_reselect( acceptsock );
342 sock->pmask &= ~FD_ACCEPT;
343 sock->hmask &= ~FD_ACCEPT;
344 release_object( sock );
345 return &acceptsock->obj;
348 /* set the last error depending on errno */
349 static int sock_get_error( int err )
353 case EINTR: return WSAEINTR; break;
354 case EBADF: return WSAEBADF; break;
356 case EACCES: return WSAEACCES; break;
357 case EFAULT: return WSAEFAULT; break;
358 case EINVAL: return WSAEINVAL; break;
359 case EMFILE: return WSAEMFILE; break;
360 case EWOULDBLOCK: return WSAEWOULDBLOCK; break;
361 case EINPROGRESS: return WSAEINPROGRESS; break;
362 case EALREADY: return WSAEALREADY; break;
363 case ENOTSOCK: return WSAENOTSOCK; break;
364 case EDESTADDRREQ: return WSAEDESTADDRREQ; break;
365 case EMSGSIZE: return WSAEMSGSIZE; break;
366 case EPROTOTYPE: return WSAEPROTOTYPE; break;
367 case ENOPROTOOPT: return WSAENOPROTOOPT; break;
368 case EPROTONOSUPPORT: return WSAEPROTONOSUPPORT; break;
369 case ESOCKTNOSUPPORT: return WSAESOCKTNOSUPPORT; break;
370 case EOPNOTSUPP: return WSAEOPNOTSUPP; break;
371 case EPFNOSUPPORT: return WSAEPFNOSUPPORT; break;
372 case EAFNOSUPPORT: return WSAEAFNOSUPPORT; break;
373 case EADDRINUSE: return WSAEADDRINUSE; break;
374 case EADDRNOTAVAIL: return WSAEADDRNOTAVAIL; break;
375 case ENETDOWN: return WSAENETDOWN; break;
376 case ENETUNREACH: return WSAENETUNREACH; break;
377 case ENETRESET: return WSAENETRESET; break;
378 case ECONNABORTED: return WSAECONNABORTED; break;
380 case ECONNRESET: return WSAECONNRESET; break;
381 case ENOBUFS: return WSAENOBUFS; break;
382 case EISCONN: return WSAEISCONN; break;
383 case ENOTCONN: return WSAENOTCONN; break;
384 case ESHUTDOWN: return WSAESHUTDOWN; break;
385 case ETOOMANYREFS: return WSAETOOMANYREFS; break;
386 case ETIMEDOUT: return WSAETIMEDOUT; break;
387 case ECONNREFUSED: return WSAECONNREFUSED; break;
388 case ELOOP: return WSAELOOP; break;
389 case ENAMETOOLONG: return WSAENAMETOOLONG; break;
390 case EHOSTDOWN: return WSAEHOSTDOWN; break;
391 case EHOSTUNREACH: return WSAEHOSTUNREACH; break;
392 case ENOTEMPTY: return WSAENOTEMPTY; break;
394 case EPROCLIM: return WSAEPROCLIM; break;
397 case EUSERS: return WSAEUSERS; break;
400 case EDQUOT: return WSAEDQUOT; break;
403 case ESTALE: return WSAESTALE; break;
406 case EREMOTE: return WSAEREMOTE; break;
408 default: errno=err; perror("sock_set_error"); return ERROR_UNKNOWN; break;
412 /* set the last error depending on errno */
413 static void sock_set_error(void)
415 set_error( sock_get_error( errno ) );
418 /* create a socket */
419 DECL_HANDLER(create_socket)
424 if ((obj = create_socket( req->family, req->type, req->protocol )) != NULL)
426 s = alloc_handle( current->process, obj, req->access, req->inherit );
427 release_object( obj );
432 /* accept a socket */
433 DECL_HANDLER(accept_socket)
438 if ((obj = accept_socket( req->lhandle )) != NULL)
440 s = alloc_handle( current->process, obj, req->access, req->inherit );
441 release_object( obj );
446 /* set socket event parameters */
447 DECL_HANDLER(set_socket_event)
450 struct event *oevent;
453 sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
456 oevent = sock->event;
458 sock->mask = req->mask;
459 sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
460 if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
461 sock_reselect( sock );
463 sock->state |= WS_FD_NONBLOCKING;
466 if ((oevent != sock->event) && (omask & WS_FD_SERVEVENT))
467 /* if the service thread was waiting for the old event object,
468 * we should now signal it, to let the service thread
469 * object detect that it is now orphaned... */
471 /* we're through with it */
472 release_object( oevent );
474 release_object( &sock->obj );
477 /* get socket event parameters */
478 DECL_HANDLER(get_socket_event)
482 sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
488 set_error(WSAENOTSOCK);
491 req->mask = sock->mask;
492 req->pmask = sock->pmask;
493 req->state = sock->state;
494 memcpy(req->errors, sock->errors, sizeof(sock->errors));
500 struct event *sevent = get_event_obj(current->process, req->s_event, 0);
501 if (sevent == sock->event)
503 release_object( sevent );
509 struct event *cevent = get_event_obj(current->process, req->c_event, EVENT_MODIFY_STATE);
510 reset_event( cevent );
511 release_object( cevent );
514 sock_reselect( sock );
516 else set_error(WSAEINVAL);
518 release_object( &sock->obj );
521 /* re-enable pending socket events */
522 DECL_HANDLER(enable_socket_event)
526 sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
529 sock->pmask &= ~req->mask; /* is this safe? */
530 sock->hmask &= ~req->mask;
531 sock->state |= req->sstate;
532 sock->state &= ~req->cstate;
533 sock_reselect( sock );
535 /* service trigger */
536 if (req->mask & WS_FD_SERVEVENT)
538 sock->pmask |= WS_FD_SERVEVENT;
540 if (debug_level) fprintf(stderr, "signalling service event ptr %p\n", sock->event);
541 set_event(sock->event);
545 release_object( &sock->obj );