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>
34 #include <atalk/netatalk_conf.h>
36 #include "afp_config.h"
40 #include "afp_zeroconf.h"
43 #define AFP_LISTENERS 32
44 #define FDSET_SAFETY 5
46 unsigned char nologin = 0;
49 static server_child_t *server_children;
50 static sig_atomic_t reloadconfig = 0;
51 static sig_atomic_t gotsigchld = 0;
53 /* Two pointers to dynamic allocated arrays which store pollfds and associated data */
54 static struct pollfd *fdset;
55 static struct polldata *polldata;
56 static int fdset_size; /* current allocated size */
57 static int fdset_used; /* number of used elements */
59 static afp_child_t *dsi_start(AFPObj *obj, DSI *dsi, server_child_t *server_children);
61 static void afp_exit(int ret)
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,
86 static void fd_reset_listening_sockets(const AFPObj *config)
90 for (dsi = config->dsi; dsi; dsi = dsi->next) {
91 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, dsi->serversock);
95 /* ------------------ */
96 static void afp_goaway(int sig)
102 LOG(log_note, logtype_afpd, "AFP Server shutting down");
104 server_child_kill(server_children, SIGTERM);
111 LOG(log_info, logtype_afpd, "disallowing logins");
114 server_child_kill(server_children, sig);
118 /* w/ a configuration file, we can force a re-read if we want */
123 /* w/ a configuration file, we can force a re-read if we want */
128 LOG(log_error, logtype_afpd, "afp_goaway: bad signal" );
133 static void child_handler(void)
140 #define WAIT_ANY (-1)
141 #endif /* ! WAIT_ANY */
143 while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) {
144 if (WIFEXITED(status)) {
145 if (WEXITSTATUS(status))
146 LOG(log_info, logtype_afpd, "child[%d]: exited %d", pid, WEXITSTATUS(status));
148 LOG(log_info, logtype_afpd, "child[%d]: done", pid);
150 if (WIFSIGNALED(status))
151 LOG(log_info, logtype_afpd, "child[%d]: killed by signal %d", pid, WTERMSIG(status));
153 LOG(log_info, logtype_afpd, "child[%d]: died", pid);
156 fd = server_child_remove(server_children, pid);
158 LOG(log_error, logtype_afpd, "child[%d]: bad IPC fd", pid);
161 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, fd);
165 static int setlimits(void)
169 if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
170 LOG(log_warning, logtype_afpd, "setlimits: reading current limits failed: %s", strerror(errno));
173 if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur < 65535) {
174 rlim.rlim_cur = 65535;
175 if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_max < 65535)
176 rlim.rlim_max = 65535;
177 if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
178 LOG(log_warning, logtype_afpd, "setlimits: increasing limits failed: %s", strerror(errno));
185 int main(int ac, char **av)
191 /* Parse argv args and initialize default options */
192 afp_options_parse_cmdline(&obj, ac, av);
194 if (!(obj.cmdlineflags & OPTION_DEBUG) && (daemonize(0, 0) != 0))
197 /* Log SIGBUS/SIGSEGV SBT */
200 if (afp_config_parse(&obj, "afpd") != 0)
201 afp_exit(EXITERR_CONF);
203 /* Save the user's current umask */
204 obj.options.save_mask = umask(obj.options.umask);
206 /* install child handler for asp and dsi. we do this before afp_goaway
207 * as afp_goaway references stuff from here.
208 * XXX: this should really be setup after the initial connections. */
209 if (!(server_children = server_child_alloc(obj.options.connections))) {
210 LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) );
211 afp_exit(EXITERR_SYS);
215 pthread_sigmask(SIG_SETMASK, &sigs, NULL);
217 memset(&sv, 0, sizeof(sv));
218 /* linux at least up to 2.4.22 send a SIGXFZ for vfat fs,
219 even if the file is open with O_LARGEFILE ! */
221 sv.sa_handler = SIG_IGN;
222 sigemptyset( &sv.sa_mask );
223 if (sigaction(SIGXFSZ, &sv, NULL ) < 0 ) {
224 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
225 afp_exit(EXITERR_SYS);
229 sv.sa_handler = SIG_IGN;
230 sigemptyset( &sv.sa_mask );
231 if (sigaction(SIGPIPE, &sv, NULL ) < 0 ) {
232 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
233 afp_exit(EXITERR_SYS);
236 sv.sa_handler = afp_goaway; /* handler for all sigs */
238 sigemptyset( &sv.sa_mask );
239 sigaddset(&sv.sa_mask, SIGALRM);
240 sigaddset(&sv.sa_mask, SIGHUP);
241 sigaddset(&sv.sa_mask, SIGTERM);
242 sigaddset(&sv.sa_mask, SIGUSR1);
243 sigaddset(&sv.sa_mask, SIGQUIT);
244 sv.sa_flags = SA_RESTART;
245 if ( sigaction( SIGCHLD, &sv, NULL ) < 0 ) {
246 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
247 afp_exit(EXITERR_SYS);
250 sigemptyset( &sv.sa_mask );
251 sigaddset(&sv.sa_mask, SIGALRM);
252 sigaddset(&sv.sa_mask, SIGTERM);
253 sigaddset(&sv.sa_mask, SIGHUP);
254 sigaddset(&sv.sa_mask, SIGCHLD);
255 sigaddset(&sv.sa_mask, SIGQUIT);
256 sv.sa_flags = SA_RESTART;
257 if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
258 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
259 afp_exit(EXITERR_SYS);
262 sigemptyset( &sv.sa_mask );
263 sigaddset(&sv.sa_mask, SIGALRM);
264 sigaddset(&sv.sa_mask, SIGTERM);
265 sigaddset(&sv.sa_mask, SIGUSR1);
266 sigaddset(&sv.sa_mask, SIGCHLD);
267 sigaddset(&sv.sa_mask, SIGQUIT);
268 sv.sa_flags = SA_RESTART;
269 if ( sigaction( SIGHUP, &sv, NULL ) < 0 ) {
270 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
271 afp_exit(EXITERR_SYS);
274 sigemptyset( &sv.sa_mask );
275 sigaddset(&sv.sa_mask, SIGALRM);
276 sigaddset(&sv.sa_mask, SIGHUP);
277 sigaddset(&sv.sa_mask, SIGUSR1);
278 sigaddset(&sv.sa_mask, SIGCHLD);
279 sigaddset(&sv.sa_mask, SIGQUIT);
280 sv.sa_flags = SA_RESTART;
281 if ( sigaction( SIGTERM, &sv, NULL ) < 0 ) {
282 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
283 afp_exit(EXITERR_SYS);
286 sigemptyset( &sv.sa_mask );
287 sigaddset(&sv.sa_mask, SIGALRM);
288 sigaddset(&sv.sa_mask, SIGHUP);
289 sigaddset(&sv.sa_mask, SIGUSR1);
290 sigaddset(&sv.sa_mask, SIGCHLD);
291 sigaddset(&sv.sa_mask, SIGTERM);
292 sv.sa_flags = SA_RESTART;
293 if (sigaction(SIGQUIT, &sv, NULL ) < 0 ) {
294 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
295 afp_exit(EXITERR_SYS);
298 /* afp.conf: not in config file: lockfile, configfile
299 * preference: command-line provides defaults.
300 * config file over-writes defaults.
302 * we also need to make sure that killing afpd during startup
303 * won't leave any lingering registered names around.
307 sigaddset(&sigs, SIGALRM);
308 sigaddset(&sigs, SIGHUP);
309 sigaddset(&sigs, SIGUSR1);
311 /* don't block SIGTERM */
312 sigaddset(&sigs, SIGTERM);
314 sigaddset(&sigs, SIGCHLD);
316 pthread_sigmask(SIG_BLOCK, &sigs, NULL);
317 #ifdef HAVE_DBUS_GLIB
318 /* Run dbus AFP statics thread */
319 if (obj.options.flags & OPTION_DBUS_AFPSTATS)
320 (void)afpstats_init(server_children);
322 if (configinit(&obj) != 0) {
323 LOG(log_error, logtype_afpd, "main: no servers configured");
324 afp_exit(EXITERR_CONF);
326 pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
331 /* watch atp, dsi sockets and ipc parent/child file descriptor. */
332 fd_set_listening_sockets(&obj);
342 /* wait for an appleshare connection. parent remains in the loop
343 * while the children get handled by afp_over_{asp,dsi}. this is
344 * currently vulnerable to a denial-of-service attack if a
345 * connection is made without an actual login attempt being made
346 * afterwards. establishing timeouts for logins is a possible
349 LOG(log_maxdebug, logtype_afpd, "main: polling %i fds", fdset_used);
350 pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
351 ret = poll(fdset, fdset_used, -1);
352 pthread_sigmask(SIG_BLOCK, &sigs, NULL);
364 fd_reset_listening_sockets(&obj);
366 LOG(log_info, logtype_afpd, "re-reading configuration file");
368 configfree(&obj, NULL);
369 afp_config_free(&obj);
371 if (afp_config_parse(&obj, "afpd") != 0)
372 afp_exit(EXITERR_CONF);
374 if (configinit(&obj) != 0) {
375 LOG(log_error, logtype_afpd, "config re-read: no servers configured");
376 afp_exit(EXITERR_CONF);
379 fd_set_listening_sockets(&obj);
393 LOG(log_error, logtype_afpd, "main: can't wait for input: %s", strerror(errno));
397 for (int i = 0; i < fdset_used; i++) {
398 if (fdset[i].revents & (POLLIN | POLLERR | POLLHUP | POLLNVAL)) {
399 switch (polldata[i].fdtype) {
402 if ((child = dsi_start(&obj, (DSI *)polldata[i].data, server_children))) {
403 /* Add IPC fd to select fd set */
404 fdset_add_fd(obj.options.connections + AFP_LISTENERS + FDSET_SAFETY,
416 child = (afp_child_t *)polldata[i].data;
417 LOG(log_debug, logtype_afpd, "main: IPC request from child[%u]", child->afpch_pid);
419 if (ipc_server_read(server_children, child->afpch_ipc_fd) != 0) {
420 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->afpch_ipc_fd);
421 close(child->afpch_ipc_fd);
422 child->afpch_ipc_fd = -1;
427 LOG(log_debug, logtype_afpd, "main: IPC request for unknown type");
437 static afp_child_t *dsi_start(AFPObj *obj, DSI *dsi, server_child_t *server_children)
439 afp_child_t *child = NULL;
441 if (dsi_getsession(dsi, server_children, obj->options.tickleval, &child) != 0) {
442 LOG(log_error, logtype_afpd, "dsi_start: session error: %s", strerror(errno));
448 configfree(obj, dsi);
449 afp_over_dsi(obj); /* start a session */