2 * Server-side request handling
4 * Copyright (C) 1998 Alexandre Julliard
21 #include <sys/types.h>
22 #ifdef HAVE_SYS_SOCKET_H
23 # include <sys/socket.h>
34 #define WANT_REQUEST_HANDLERS
37 /* Some versions of glibc don't define this */
42 /* path names for server master Unix socket */
43 #define CONFDIR "/.wine" /* directory for Wine config relative to $HOME */
44 #define SERVERDIR "wineserver-" /* server socket directory (hostname appended) */
45 #define SOCKETNAME "socket" /* name of the socket file */
49 struct object obj; /* object header */
52 static void master_socket_dump( struct object *obj, int verbose );
53 static void master_socket_poll_event( struct object *obj, int event );
54 static void master_socket_destroy( struct object *obj );
56 static const struct object_ops master_socket_ops =
58 sizeof(struct master_socket), /* size */
59 master_socket_dump, /* dump */
60 no_add_queue, /* add_queue */
61 NULL, /* remove_queue */
64 NULL, /* get_poll_events */
65 master_socket_poll_event, /* poll_event */
66 no_get_fd, /* get_fd */
68 no_get_file_info, /* get_file_info */
69 NULL, /* queue_async */
70 master_socket_destroy /* destroy */
74 struct thread *current = NULL; /* thread handling the current request */
75 unsigned int global_error = 0; /* global error code for when no thread is current */
76 unsigned int server_start_ticks = 0; /* tick count offset from server startup */
78 static struct master_socket *master_socket; /* the master socket object */
80 /* socket communication static structures */
81 static struct iovec myiovec;
82 static struct msghdr msghdr;
83 #ifndef HAVE_MSGHDR_ACCRIGHTS
86 int len; /* sizeof structure */
87 int level; /* SOL_SOCKET */
88 int type; /* SCM_RIGHTS */
89 int fd; /* fd to pass */
91 static struct cmsg_fd cmsg = { sizeof(cmsg), SOL_SOCKET, SCM_RIGHTS, -1 };
92 #endif /* HAVE_MSGHDR_ACCRIGHTS */
94 /* complain about a protocol error and terminate the client connection */
95 void fatal_protocol_error( struct thread *thread, const char *err, ... )
99 va_start( args, err );
100 fprintf( stderr, "Protocol error:%p: ", thread );
101 vfprintf( stderr, err, args );
103 thread->exit_code = 1;
104 kill_thread( thread, 1 );
107 /* complain about a protocol error and terminate the client connection */
108 void fatal_protocol_perror( struct thread *thread, const char *err, ... )
112 va_start( args, err );
113 fprintf( stderr, "Protocol error:%p: ", thread );
114 vfprintf( stderr, err, args );
117 thread->exit_code = 1;
118 kill_thread( thread, 1 );
121 /* die on a fatal error */
122 void fatal_error( const char *err, ... )
126 va_start( args, err );
127 fprintf( stderr, "wineserver: " );
128 vfprintf( stderr, err, args );
133 /* die on a fatal error */
134 void fatal_perror( const char *err, ... )
138 va_start( args, err );
139 fprintf( stderr, "wineserver: " );
140 vfprintf( stderr, err, args );
146 /* allocate the reply data */
147 void *set_reply_data_size( size_t size )
149 assert( size <= get_reply_max_size() );
150 if (size && !(current->reply_data = mem_alloc( size ))) size = 0;
151 current->reply_size = size;
152 return current->reply_data;
155 /* write the remaining part of the reply */
156 void write_reply( struct thread *thread )
160 if ((ret = write( thread->reply_fd,
161 (char *)thread->reply_data + thread->reply_size - thread->reply_towrite,
162 thread->reply_towrite )) >= 0)
164 if (!(thread->reply_towrite -= ret))
166 free( thread->reply_data );
167 thread->reply_data = NULL;
168 /* sent everything, can go back to waiting for requests */
169 change_select_fd( &thread->obj, thread->request_fd, POLLIN );
174 kill_thread( thread, 0 ); /* normal death */
175 else if (errno != EWOULDBLOCK && errno != EAGAIN)
176 fatal_protocol_perror( thread, "reply write" );
179 /* send a reply to the current thread */
180 static void send_reply( union generic_reply *reply )
184 if (!current->reply_size)
186 if ((ret = write( current->reply_fd, reply, sizeof(*reply) )) != sizeof(*reply)) goto error;
192 vec[0].iov_base = reply;
193 vec[0].iov_len = sizeof(*reply);
194 vec[1].iov_base = current->reply_data;
195 vec[1].iov_len = current->reply_size;
197 if ((ret = writev( current->reply_fd, vec, 2 )) < sizeof(*reply)) goto error;
199 if ((current->reply_towrite = current->reply_size - (ret - sizeof(*reply))))
201 /* couldn't write it all, wait for POLLOUT */
202 change_select_fd( ¤t->obj, current->reply_fd, POLLOUT );
206 if (current->reply_data)
208 free( current->reply_data );
209 current->reply_data = NULL;
215 fatal_protocol_error( current, "partial write %d\n", ret );
216 else if (errno == EPIPE)
217 kill_thread( current, 0 ); /* normal death */
219 fatal_protocol_perror( current, "reply write" );
222 /* call a request handler */
223 static void call_req_handler( struct thread *thread )
225 union generic_reply reply;
226 enum request req = thread->req.request_header.req;
229 current->reply_size = 0;
231 memset( &reply, 0, sizeof(reply) );
233 if (debug_level) trace_request();
235 if (req < REQ_NB_REQUESTS)
237 req_handlers[req]( ¤t->req, &reply );
240 reply.reply_header.error = current->error;
241 reply.reply_header.reply_size = current->reply_size;
242 if (debug_level) trace_reply( req, &reply );
243 send_reply( &reply );
248 fatal_protocol_error( current, "bad request %d\n", req );
251 /* read a request from a thread */
252 void read_request( struct thread *thread )
256 if (!thread->req_toread) /* no pending request */
258 if ((ret = read( thread->obj.fd, &thread->req,
259 sizeof(thread->req) )) != sizeof(thread->req)) goto error;
260 if (!(thread->req_toread = thread->req.request_header.request_size))
262 /* no data, handle request at once */
263 call_req_handler( thread );
266 if (!(thread->req_data = malloc( thread->req_toread )))
267 fatal_protocol_error( thread, "no memory for %d bytes request\n", thread->req_toread );
270 /* read the variable sized data */
273 ret = read( thread->obj.fd, ((char *)thread->req_data +
274 thread->req.request_header.request_size - thread->req_toread),
275 thread->req_toread );
277 if (!(thread->req_toread -= ret))
279 call_req_handler( thread );
280 free( thread->req_data );
281 thread->req_data = NULL;
287 if (!ret) /* closed pipe */
288 kill_thread( thread, 0 );
290 fatal_protocol_error( thread, "partial read %d\n", ret );
291 else if (errno != EWOULDBLOCK && errno != EAGAIN)
292 fatal_protocol_perror( thread, "read" );
295 /* receive a file descriptor on the process socket */
296 int receive_fd( struct process *process )
301 #ifdef HAVE_MSGHDR_ACCRIGHTS
302 msghdr.msg_accrightslen = sizeof(int);
303 msghdr.msg_accrights = (void *)&fd;
304 #else /* HAVE_MSGHDR_ACCRIGHTS */
305 msghdr.msg_control = &cmsg;
306 msghdr.msg_controllen = sizeof(cmsg);
308 #endif /* HAVE_MSGHDR_ACCRIGHTS */
310 myiovec.iov_base = &data;
311 myiovec.iov_len = sizeof(data);
313 ret = recvmsg( process->obj.fd, &msghdr, 0 );
314 #ifndef HAVE_MSGHDR_ACCRIGHTS
318 if (ret == sizeof(data))
320 struct thread *thread;
322 if (data.tid) thread = get_thread_from_id( data.tid );
323 else thread = (struct thread *)grab_object( process->thread_list );
325 if (!thread || thread->process != process)
328 fprintf( stderr, "%08x: *fd* %d <- %d bad thread id\n",
329 (unsigned int)data.tid, data.fd, fd );
335 fprintf( stderr, "%08x: *fd* %d <- %d\n",
336 (unsigned int)thread, data.fd, fd );
337 thread_add_inflight_fd( thread, data.fd, fd );
339 if (thread) release_object( thread );
346 fprintf( stderr, "Protocol error: process %p: partial recvmsg %d for fd\n",
348 kill_process( process, NULL, 1 );
352 if (errno != EWOULDBLOCK && errno != EAGAIN)
354 fprintf( stderr, "Protocol error: process %p: ", process );
356 kill_process( process, NULL, 1 );
362 /* send an fd to a client */
363 int send_client_fd( struct process *process, int fd, handle_t handle )
368 fprintf( stderr, "%08x: *fd* %d -> %d\n", (unsigned int)current, handle, fd );
370 #ifdef HAVE_MSGHDR_ACCRIGHTS
371 msghdr.msg_accrightslen = sizeof(fd);
372 msghdr.msg_accrights = (void *)&fd;
373 #else /* HAVE_MSGHDR_ACCRIGHTS */
374 msghdr.msg_control = &cmsg;
375 msghdr.msg_controllen = sizeof(cmsg);
377 #endif /* HAVE_MSGHDR_ACCRIGHTS */
379 myiovec.iov_base = (void *)&handle;
380 myiovec.iov_len = sizeof(handle);
382 ret = sendmsg( process->obj.fd, &msghdr, 0 );
384 if (ret == sizeof(handle)) return 0;
389 fprintf( stderr, "Protocol error: process %p: partial sendmsg %d\n", process, ret );
390 kill_process( process, NULL, 1 );
394 fprintf( stderr, "Protocol error: process %p: ", process );
396 kill_process( process, NULL, 1 );
401 /* get current tick count to return to client */
402 unsigned int get_tick_count(void)
405 gettimeofday( &t, NULL );
406 return (t.tv_sec * 1000) + (t.tv_usec / 1000) - server_start_ticks;
409 static void master_socket_dump( struct object *obj, int verbose )
411 struct master_socket *sock = (struct master_socket *)obj;
412 assert( obj->ops == &master_socket_ops );
413 fprintf( stderr, "Master socket fd=%d\n", sock->obj.fd );
416 /* handle a socket event */
417 static void master_socket_poll_event( struct object *obj, int event )
419 struct master_socket *sock = (struct master_socket *)obj;
420 assert( obj->ops == &master_socket_ops );
422 assert( sock == master_socket ); /* there is only one master socket */
424 if (event & (POLLERR | POLLHUP))
426 /* this is not supposed to happen */
427 fprintf( stderr, "wineserver: Error on master socket\n" );
428 release_object( obj );
430 else if (event & POLLIN)
432 struct sockaddr_un dummy;
433 int len = sizeof(dummy);
434 int client = accept( master_socket->obj.fd, (struct sockaddr *) &dummy, &len );
435 if (client == -1) return;
436 fcntl( client, F_SETFL, O_NONBLOCK );
437 create_process( client );
441 /* remove the socket upon exit */
442 static void socket_cleanup(void)
444 static int do_it_once;
445 if (!do_it_once++) unlink( SOCKETNAME );
448 static void master_socket_destroy( struct object *obj )
453 /* return the configuration directory ($WINEPREFIX or $HOME/.wine) */
454 const char *get_config_dir(void)
456 static char *confdir;
459 const char *prefix = getenv( "WINEPREFIX" );
462 int len = strlen(prefix);
463 if (!(confdir = strdup( prefix ))) fatal_error( "out of memory\n" );
464 if (len > 1 && confdir[len-1] == '/') confdir[len-1] = 0;
468 const char *home = getenv( "HOME" );
471 struct passwd *pwd = getpwuid( getuid() );
472 if (!pwd) fatal_error( "could not find your home directory\n" );
475 if (!(confdir = malloc( strlen(home) + strlen(CONFDIR) + 1 )))
476 fatal_error( "out of memory\n" );
477 strcpy( confdir, home );
478 strcat( confdir, CONFDIR );
484 /* create the server directory and chdir to it */
485 static void create_server_dir(void)
489 const char *confdir = get_config_dir();
492 if (gethostname( hostname, sizeof(hostname) ) == -1) fatal_perror( "gethostname" );
494 if (!(serverdir = malloc( strlen(SERVERDIR) + strlen(hostname) + 1 )))
495 fatal_error( "out of memory\n" );
497 if (chdir( confdir ) == -1) fatal_perror( "chdir %s", confdir );
499 strcpy( serverdir, SERVERDIR );
500 strcat( serverdir, hostname );
502 if (chdir( serverdir ) == -1)
504 if (errno != ENOENT) fatal_perror( "chdir %s", serverdir );
505 if (mkdir( serverdir, 0700 ) == -1) fatal_perror( "mkdir %s", serverdir );
506 if (chdir( serverdir ) == -1) fatal_perror( "chdir %s", serverdir );
508 if (stat( ".", &st ) == -1) fatal_perror( "stat %s", serverdir );
509 if (!S_ISDIR(st.st_mode)) fatal_error( "%s is not a directory\n", serverdir );
510 if (st.st_uid != getuid()) fatal_error( "%s is not owned by you\n", serverdir );
511 if (st.st_mode & 077) fatal_error( "%s must not be accessible by other users\n", serverdir );
514 /* open the master server socket and start waiting for new clients */
515 void open_master_socket(void)
517 struct sockaddr_un addr;
520 /* make sure no request is larger than the maximum size */
521 assert( sizeof(union generic_request) == sizeof(struct request_max_size) );
522 assert( sizeof(union generic_reply) == sizeof(struct request_max_size) );
525 if ((fd = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
526 addr.sun_family = AF_UNIX;
527 strcpy( addr.sun_path, SOCKETNAME );
528 slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1;
529 #ifdef HAVE_SOCKADDR_SUN_LEN
532 if (bind( fd, (struct sockaddr *)&addr, slen ) == -1)
534 if ((errno == EEXIST) || (errno == EADDRINUSE))
535 exit(0); /* pretend we succeeded to start */
537 fatal_perror( "bind" );
539 atexit( socket_cleanup );
541 chmod( SOCKETNAME, 0600 ); /* make sure no other user can connect */
542 if (listen( fd, 5 ) == -1) fatal_perror( "listen" );
544 if (!(master_socket = alloc_object( &master_socket_ops, fd )))
545 fatal_error( "out of memory\n" );
546 set_select_events( &master_socket->obj, POLLIN );
548 /* setup msghdr structure constant fields */
549 msghdr.msg_name = NULL;
550 msghdr.msg_namelen = 0;
551 msghdr.msg_iov = &myiovec;
552 msghdr.msg_iovlen = 1;
554 /* init startup ticks */
555 server_start_ticks = get_tick_count();
557 /* go in the background */
561 fatal_perror( "fork" );
566 _exit(0); /* do not call atexit functions */
570 /* close the master socket and stop waiting for new clients */
571 void close_master_socket(void)
573 /* if a new client is waiting, we keep on running */
574 if (!check_select_events( master_socket->obj.fd, POLLIN ))
575 release_object( master_socket );
578 /* lock/unlock the master socket to stop accepting new clients */
579 void lock_master_socket( int locked )
581 set_select_events( &master_socket->obj, locked ? 0 : POLLIN );