2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
8 #endif /* HAVE_CONFIG_H */
14 #include <sys/param.h>
17 #include <sys/socket.h>
21 #include <sys/resource.h>
23 #include <atalk/logger.h>
24 #include <atalk/adouble.h>
25 #include <atalk/compat.h>
26 #include <atalk/dsi.h>
27 #include <atalk/afp.h>
28 #include <atalk/paths.h>
29 #include <atalk/util.h>
30 #include <atalk/server_child.h>
31 #include <atalk/server_ipc.h>
32 #include <atalk/errchk.h>
33 #include <atalk/globals.h>
35 #include "afp_config.h"
39 #include "afp_zeroconf.h"
41 #define AFP_LISTENERS 32
42 #define FDSET_SAFETY 5
44 unsigned char nologin = 0;
47 static server_child *server_children;
48 static sig_atomic_t reloadconfig = 0;
49 static sig_atomic_t gotsigchld = 0;
51 /* Two pointers to dynamic allocated arrays which store pollfds and associated data */
52 static struct pollfd *fdset;
53 static struct polldata *polldata;
54 static int fdset_size; /* current allocated size */
55 static int fdset_used; /* number of used elements */
56 static int disasociated_ipc_fd; /* disasociated sessions uses this fd for IPC */
58 /* This is registered with atexit() */
59 static void afp_exit(void)
61 if (parent_or_child == 0)
62 /* Only do this in the parent */
63 server_unlock(default_options.pidfile);
68 initialize fd set we are waiting for.
70 static void fd_set_listening_sockets(const AFPObj *config)
74 for (dsi = config->dsi; dsi; dsi = dsi->next) {
75 fdset_add_fd(config->options.connections + AFP_LISTENERS + FDSET_SAFETY,
85 if (config->options.flags & OPTION_KEEPSESSIONS)
86 fdset_add_fd(config->options.connections + AFP_LISTENERS + FDSET_SAFETY,
96 static void fd_reset_listening_sockets(const AFPObj *config)
100 for (dsi = config->dsi; dsi; dsi = dsi->next) {
101 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, dsi->serversock);
104 if (config->options.flags & OPTION_KEEPSESSIONS)
105 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, disasociated_ipc_fd);
108 /* ------------------ */
109 static void afp_goaway(int sig)
117 LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGTERM");
120 if (default_options.flags & OPTION_KEEPSESSIONS) {
121 LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT, NOT disconnecting clients");
123 LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT");
129 server_child_kill(server_children, CHILD_DSIFORK, sig);
132 server_unlock(AFPObj->options.pidfile);
139 LOG(log_info, logtype_afpd, "disallowing logins");
142 server_child_kill(server_children, CHILD_DSIFORK, sig);
146 /* w/ a configuration file, we can force a re-read if we want */
151 /* w/ a configuration file, we can force a re-read if we want */
156 LOG(log_error, logtype_afpd, "afp_goaway: bad signal" );
161 static void child_handler(void)
168 #define WAIT_ANY (-1)
169 #endif /* ! WAIT_ANY */
171 while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) {
172 for (i = 0; i < server_children->nforks; i++) {
173 if ((fd = server_child_remove(server_children, i, pid)) != -1) {
174 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, fd);
179 if (WIFEXITED(status)) {
180 if (WEXITSTATUS(status))
181 LOG(log_info, logtype_afpd, "child[%d]: exited %d", pid, WEXITSTATUS(status));
183 LOG(log_info, logtype_afpd, "child[%d]: done", pid);
185 if (WIFSIGNALED(status))
186 LOG(log_info, logtype_afpd, "child[%d]: killed by signal %d", pid, WTERMSIG(status));
188 LOG(log_info, logtype_afpd, "child[%d]: died", pid);
193 static int setlimits(void)
197 if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
198 LOG(log_warning, logtype_afpd, "setlimits: reading current limits failed: %s", strerror(errno));
201 if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur < 65535) {
202 rlim.rlim_cur = 65535;
203 if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_max < 65535)
204 rlim.rlim_max = 65535;
205 if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
206 LOG(log_warning, logtype_afpd, "setlimits: increasing limits failed: %s", strerror(errno));
213 int main(int ac, char **av)
220 struct afp_options default_options = {0};
222 /* Parse argv args and initialize default options */
223 afp_options_init(&default_options);
224 if (!afp_options_parse_cmdline(ac, av, &default_options))
227 if (check_lockfile("afpd", default_options.pidfile) != 0)
230 if (!(default_options.flags & OPTION_DEBUG) && (daemonize(0, 0) != 0))
233 if (create_lockfile("afpd", default_options.pidfile) != 0)
236 /* Log SIGBUS/SIGSEGV SBT */
239 /* Default log setup: log to syslog */
240 set_processname("afpd");
241 setuplog("default log_note");
243 /* Save the user's current umask */
244 default_options.save_mask = umask( default_options.umask );
248 /* install child handler for asp and dsi. we do this before afp_goaway
249 * as afp_goaway references stuff from here.
250 * XXX: this should really be setup after the initial connections. */
251 if (!(server_children = server_child_alloc(default_options.connections,
253 LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) );
257 memset(&sv, 0, sizeof(sv));
258 /* linux at least up to 2.4.22 send a SIGXFZ for vfat fs,
259 even if the file is open with O_LARGEFILE ! */
261 sv.sa_handler = SIG_IGN;
262 sigemptyset( &sv.sa_mask );
263 if (sigaction(SIGXFSZ, &sv, NULL ) < 0 ) {
264 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
269 sv.sa_handler = afp_goaway; /* handler for all sigs */
271 sigemptyset( &sv.sa_mask );
272 sigaddset(&sv.sa_mask, SIGALRM);
273 sigaddset(&sv.sa_mask, SIGHUP);
274 sigaddset(&sv.sa_mask, SIGTERM);
275 sigaddset(&sv.sa_mask, SIGUSR1);
276 sigaddset(&sv.sa_mask, SIGQUIT);
277 sv.sa_flags = SA_RESTART;
278 if ( sigaction( SIGCHLD, &sv, NULL ) < 0 ) {
279 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
283 sigemptyset( &sv.sa_mask );
284 sigaddset(&sv.sa_mask, SIGALRM);
285 sigaddset(&sv.sa_mask, SIGTERM);
286 sigaddset(&sv.sa_mask, SIGHUP);
287 sigaddset(&sv.sa_mask, SIGCHLD);
288 sigaddset(&sv.sa_mask, SIGQUIT);
289 sv.sa_flags = SA_RESTART;
290 if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
291 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
295 sigemptyset( &sv.sa_mask );
296 sigaddset(&sv.sa_mask, SIGALRM);
297 sigaddset(&sv.sa_mask, SIGTERM);
298 sigaddset(&sv.sa_mask, SIGUSR1);
299 sigaddset(&sv.sa_mask, SIGCHLD);
300 sigaddset(&sv.sa_mask, SIGQUIT);
301 sv.sa_flags = SA_RESTART;
302 if ( sigaction( SIGHUP, &sv, NULL ) < 0 ) {
303 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
308 sigemptyset( &sv.sa_mask );
309 sigaddset(&sv.sa_mask, SIGALRM);
310 sigaddset(&sv.sa_mask, SIGHUP);
311 sigaddset(&sv.sa_mask, SIGUSR1);
312 sigaddset(&sv.sa_mask, SIGCHLD);
313 sigaddset(&sv.sa_mask, SIGQUIT);
314 sv.sa_flags = SA_RESTART;
315 if ( sigaction( SIGTERM, &sv, NULL ) < 0 ) {
316 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
320 sigemptyset( &sv.sa_mask );
321 sigaddset(&sv.sa_mask, SIGALRM);
322 sigaddset(&sv.sa_mask, SIGHUP);
323 sigaddset(&sv.sa_mask, SIGUSR1);
324 sigaddset(&sv.sa_mask, SIGCHLD);
325 sigaddset(&sv.sa_mask, SIGTERM);
326 sv.sa_flags = SA_RESTART;
327 if (sigaction(SIGQUIT, &sv, NULL ) < 0 ) {
328 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
332 /* afpd.conf: not in config file: lockfile, connections, configfile
333 * preference: command-line provides defaults.
334 * config file over-writes defaults.
336 * we also need to make sure that killing afpd during startup
337 * won't leave any lingering registered names around.
341 sigaddset(&sigs, SIGALRM);
342 sigaddset(&sigs, SIGHUP);
343 sigaddset(&sigs, SIGUSR1);
345 /* don't block SIGTERM */
346 sigaddset(&sigs, SIGTERM);
348 sigaddset(&sigs, SIGCHLD);
350 pthread_sigmask(SIG_BLOCK, &sigs, NULL);
351 if (!(AFPObj = configinit(&default_options))) {
352 LOG(log_error, logtype_afpd, "main: no servers configured");
355 pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
360 /* watch atp, dsi sockets and ipc parent/child file descriptor. */
362 if (AFPObj.options.flags & OPTION_KEEPSESSIONS) {
363 LOG(log_note, logtype_afpd, "Activating continous service");
364 disasociated_ipc_fd = ipc_server_uds(_PATH_AFP_IPC);
367 fd_set_listening_sockets(&AFPObj);
373 int fd[2]; /* we only use one, but server_child_add expects [2] */
377 /* wait for an appleshare connection. parent remains in the loop
378 * while the children get handled by afp_over_{asp,dsi}. this is
379 * currently vulnerable to a denial-of-service attack if a
380 * connection is made without an actual login attempt being made
381 * afterwards. establishing timeouts for logins is a possible
384 LOG(log_maxdebug, logtype_afpd, "main: polling %i fds", fdset_used);
385 pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
386 ret = poll(fdset, fdset_used, -1);
387 pthread_sigmask(SIG_BLOCK, &sigs, NULL);
399 fd_reset_listening_sockets(&AFPObj);
401 LOG(log_info, logtype_afpd, "re-reading configuration file");
402 dsi_cleanup(&AFPObj);
404 /* configfree close atp socket used for DDP tickle, there's an issue
407 if (!(AFPObj = configinit(&default_options))) {
408 LOG(log_error, logtype_afpd, "config re-read: no servers configured");
412 fd_set_listening_sockets(&AFPObj);
426 LOG(log_error, logtype_afpd, "main: can't wait for input: %s", strerror(errno));
430 for (int i = 0; i < fdset_used; i++) {
431 if (fdset[i].revents & (POLLIN | POLLERR | POLLHUP)) {
432 switch (polldata[i].fdtype) {
435 if (child = dsi_start(AFPObj, (DSI *)polldata[i].data, server_children)) {
436 /* Add IPC fd to select fd set */
437 fdset_add_fd(AFPObj.options.connections + AFP_LISTENERS + FDSET_SAFETY,
449 child = (afp_child_t *)polldata[i].data;
450 LOG(log_debug, logtype_afpd, "main: IPC request from child[%u]", child->pid);
452 if (ipc_server_read(server_children, child->ipc_fds[0]) != 0) {
453 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0]);
454 close(child->ipc_fds[0]);
455 child->ipc_fds[0] = -1;
456 if ((AFPObj.options.flags & OPTION_KEEPSESSIONS) && child->disasociated) {
457 LOG(log_note, logtype_afpd, "main: removing reattached child[%u]", child->pid);
458 server_child_remove(server_children, CHILD_DSIFORK, child->pid);
463 case DISASOCIATED_IPC_FD:
464 LOG(log_debug, logtype_afpd, "main: IPC reconnect request");
465 if ((fd[0] = accept(disasociated_ipc_fd, NULL, NULL)) == -1) {
466 LOG(log_error, logtype_afpd, "main: accept: %s", strerror(errno));
469 if (readt(fd[0], &pid, sizeof(pid_t), 0, 1) != sizeof(pid_t)) {
470 LOG(log_error, logtype_afpd, "main: readt: %s", strerror(errno));
474 LOG(log_note, logtype_afpd, "main: IPC reconnect from pid [%u]", pid);
475 if ((child = server_child_add(server_children, CHILD_DSIFORK, pid, fd)) == NULL) {
476 LOG(log_error, logtype_afpd, "main: server_child_add");
480 child->disasociated = 1;
481 fdset_add_fd(AFPObj.options.connections + AFP_LISTENERS + FDSET_SAFETY,
492 LOG(log_debug, logtype_afpd, "main: IPC request for unknown type");