/*
- * $Id: main.c,v 1.7 2001-05-23 23:55:23 samnoble Exp $
- *
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
#include <signal.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
#include <sys/param.h>
#include <sys/uio.h>
-#include <sys/syslog.h>
#include <sys/time.h>
#include <sys/socket.h>
-
+#include <sys/poll.h>
#include <errno.h>
+#include <sys/wait.h>
+#include <sys/resource.h>
-#include <netatalk/endian.h>
-#include <netatalk/at.h>
+#include <atalk/logger.h>
+#include <atalk/adouble.h>
#include <atalk/compat.h>
#include <atalk/dsi.h>
-#include <atalk/atp.h>
-#include <atalk/asp.h>
#include <atalk/afp.h>
-#include <atalk/adouble.h>
#include <atalk/paths.h>
#include <atalk/util.h>
#include <atalk/server_child.h>
+#include <atalk/server_ipc.h>
+#include <atalk/errchk.h>
+#include <atalk/globals.h>
+#include <atalk/netatalk_conf.h>
-#include "globals.h"
#include "afp_config.h"
#include "status.h"
#include "fork.h"
#include "uam_auth.h"
+#include "afp_zeroconf.h"
-#ifdef TRU64
-#include <sys/security.h>
-#include <prot.h>
-#include <sia.h>
-#endif /* TRU64 */
+#define AFP_LISTENERS 32
+#define FDSET_SAFETY 5
-unsigned char nologin = 0;
+unsigned char nologin = 0;
-struct afp_options default_options;
-static AFPConfig *configs;
+static AFPObj obj;
static server_child *server_children;
-static fd_set save_rfds;
+static sig_atomic_t reloadconfig = 0;
+static sig_atomic_t gotsigchld = 0;
+
+/* Two pointers to dynamic allocated arrays which store pollfds and associated data */
+static struct pollfd *fdset;
+static struct polldata *polldata;
+static int fdset_size; /* current allocated size */
+static int fdset_used; /* number of used elements */
+static int disasociated_ipc_fd; /* disasociated sessions uses this fd for IPC */
+
+static afp_child_t *dsi_start(AFPObj *obj, DSI *dsi, server_child *server_children);
+
+static void afp_exit(int ret)
+{
+ exit(ret);
+}
+
+
+/* ------------------
+ initialize fd set we are waiting for.
+*/
+static void fd_set_listening_sockets(const AFPObj *config)
+{
+ DSI *dsi;
-static void afp_exit(const int i)
+ for (dsi = config->dsi; dsi; dsi = dsi->next) {
+ fdset_add_fd(config->options.connections + AFP_LISTENERS + FDSET_SAFETY,
+ &fdset,
+ &polldata,
+ &fdset_used,
+ &fdset_size,
+ dsi->serversock,
+ LISTEN_FD,
+ dsi);
+ }
+
+ if (config->options.flags & OPTION_KEEPSESSIONS)
+ fdset_add_fd(config->options.connections + AFP_LISTENERS + FDSET_SAFETY,
+ &fdset,
+ &polldata,
+ &fdset_used,
+ &fdset_size,
+ disasociated_ipc_fd,
+ DISASOCIATED_IPC_FD,
+ NULL);
+}
+
+static void fd_reset_listening_sockets(const AFPObj *config)
{
- server_unlock(default_options.pidfile);
- exit(i);
+ const DSI *dsi;
+
+ for (dsi = config->dsi; dsi; dsi = dsi->next) {
+ fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, dsi->serversock);
+ }
+
+ if (config->options.flags & OPTION_KEEPSESSIONS)
+ fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, disasociated_ipc_fd);
}
+/* ------------------ */
static void afp_goaway(int sig)
{
-#ifndef NO_DDP
- asp_kill(sig);
-#endif
- dsi_kill(sig);
switch( sig ) {
- case SIGTERM :
- syslog( LOG_INFO, "shutting down on signal %d", sig );
- break;
+
+ case SIGTERM:
+ case SIGQUIT:
+ switch (sig) {
+ case SIGTERM:
+ LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGTERM");
+ break;
+ case SIGQUIT:
+ if (obj.options.flags & OPTION_KEEPSESSIONS) {
+ LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT, NOT disconnecting clients");
+ } else {
+ LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT");
+ sig = SIGTERM;
+ }
+ break;
+ }
+ if (server_children)
+ server_child_kill(server_children, CHILD_DSIFORK, sig);
+
+ _exit(0);
+ break;
+
+ case SIGUSR1 :
+ nologin++;
+ auth_unload();
+ LOG(log_info, logtype_afpd, "disallowing logins");
+
+ if (server_children)
+ server_child_kill(server_children, CHILD_DSIFORK, sig);
+ break;
+
case SIGHUP :
- /* w/ a configuration file, we can force a re-read if we want */
- nologin++;
- if ((nologin + 1) & 1) {
- AFPConfig *config;
-
- syslog(LOG_INFO, "re-reading configuration file");
- for (config = configs; config; config = config->next)
- if (config->server_cleanup)
- config->server_cleanup(config);
-
- configfree(configs, NULL);
- if (!(configs = configinit(&default_options))) {
- syslog(LOG_ERR, "config re-read: no servers configured");
- afp_exit(1);
- }
- FD_ZERO(&save_rfds);
- for (config = configs; config; config = config->next) {
- if (config->fd < 0)
- continue;
- FD_SET(config->fd, &save_rfds);
- }
- } else {
- syslog(LOG_INFO, "disallowing logins");
- auth_unload();
- }
- break;
+ /* w/ a configuration file, we can force a re-read if we want */
+ reloadconfig = 1;
+ break;
+
+ case SIGCHLD:
+ /* w/ a configuration file, we can force a re-read if we want */
+ gotsigchld = 1;
+ break;
+
default :
- syslog( LOG_ERR, "afp_goaway: bad signal" );
+ LOG(log_error, logtype_afpd, "afp_goaway: bad signal" );
}
- if ( sig == SIGTERM ) {
- AFPConfig *config;
-
- for (config = configs; config; config = config->next)
- if (config->server_cleanup)
- config->server_cleanup(config);
+ return;
+}
- afp_exit(0);
+static void child_handler(void)
+{
+ int fd;
+ int status, i;
+ pid_t pid;
+
+#ifndef WAIT_ANY
+#define WAIT_ANY (-1)
+#endif /* ! WAIT_ANY */
+
+ while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) {
+ for (i = 0; i < server_children->nforks; i++) {
+ if ((fd = server_child_remove(server_children, i, pid)) != -1) {
+ fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, fd);
+ break;
+ }
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ LOG(log_info, logtype_afpd, "child[%d]: exited %d", pid, WEXITSTATUS(status));
+ else
+ LOG(log_info, logtype_afpd, "child[%d]: done", pid);
+ } else {
+ if (WIFSIGNALED(status))
+ LOG(log_info, logtype_afpd, "child[%d]: killed by signal %d", pid, WTERMSIG(status));
+ else
+ LOG(log_info, logtype_afpd, "child[%d]: died", pid);
+ }
}
- return;
}
-static void child_handler()
+static int setlimits(void)
{
- server_child_handler(server_children);
+ struct rlimit rlim;
+
+ if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
+ LOG(log_warning, logtype_afpd, "setlimits: reading current limits failed: %s", strerror(errno));
+ return -1;
+ }
+ if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur < 65535) {
+ rlim.rlim_cur = 65535;
+ if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_max < 65535)
+ rlim.rlim_max = 65535;
+ if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
+ LOG(log_warning, logtype_afpd, "setlimits: increasing limits failed: %s", strerror(errno));
+ return -1;
+ }
+ }
+ return 0;
}
-int main( ac, av )
- int ac;
- char **av;
+int main(int ac, char **av)
{
- AFPConfig *config;
fd_set rfds;
+ void *ipc;
struct sigaction sv;
sigset_t sigs;
+ int ret;
-#ifdef TRU64
- set_auth_parameters( ac, av );
-#endif /* TRU64 */
+ /* Parse argv args and initialize default options */
+ afp_options_parse_cmdline(&obj, ac, av);
- umask( 0 ); /* so inherited file permissions work right */
+ if (!(obj.cmdlineflags & OPTION_DEBUG) && (daemonize(0, 0) != 0))
+ exit(EXITERR_SYS);
- afp_options_init(&default_options);
- if (!afp_options_parse(ac, av, &default_options))
- exit(1);
-
- switch(server_lock("afpd", default_options.pidfile,
- default_options.flags & OPTION_DEBUG)) {
- case -1: /* error */
- exit(1);
- case 0: /* child */
- break;
- default: /* server */
- exit(0);
- }
+ /* Log SIGBUS/SIGSEGV SBT */
+ fault_setup(NULL);
+
+ if (afp_config_parse(&obj, "afpd") != 0)
+ afp_exit(EXITERR_CONF);
+
+ /* Save the user's current umask */
+ obj.options.save_mask = umask(obj.options.umask);
/* install child handler for asp and dsi. we do this before afp_goaway
* as afp_goaway references stuff from here.
* XXX: this should really be setup after the initial connections. */
- if (!(server_children = server_child_alloc(default_options.connections,
- CHILD_NFORKS))) {
- syslog(LOG_ERR, "main: server_child alloc: %m");
- afp_exit(1);
- }
-
- memset(&sv, 0, sizeof(sv));
- sv.sa_handler = child_handler;
+ if (!(server_children = server_child_alloc(obj.options.connections, CHILD_NFORKS))) {
+ LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
+ }
+
+ sigemptyset(&sigs);
+ pthread_sigmask(SIG_SETMASK, &sigs, NULL);
+
+ memset(&sv, 0, sizeof(sv));
+ /* linux at least up to 2.4.22 send a SIGXFZ for vfat fs,
+ even if the file is open with O_LARGEFILE ! */
+#ifdef SIGXFSZ
+ sv.sa_handler = SIG_IGN;
sigemptyset( &sv.sa_mask );
+ if (sigaction(SIGXFSZ, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
+ }
+#endif
+
+ sv.sa_handler = afp_goaway; /* handler for all sigs */
+
+ sigemptyset( &sv.sa_mask );
+ sigaddset(&sv.sa_mask, SIGALRM);
+ sigaddset(&sv.sa_mask, SIGHUP);
+ sigaddset(&sv.sa_mask, SIGTERM);
+ sigaddset(&sv.sa_mask, SIGUSR1);
+ sigaddset(&sv.sa_mask, SIGQUIT);
sv.sa_flags = SA_RESTART;
- if ( sigaction( SIGCHLD, &sv, 0 ) < 0 ) {
- syslog( LOG_ERR, "main: sigaction: %m" );
- afp_exit(1);
+ if ( sigaction( SIGCHLD, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
}
- sv.sa_handler = afp_goaway;
sigemptyset( &sv.sa_mask );
+ sigaddset(&sv.sa_mask, SIGALRM);
+ sigaddset(&sv.sa_mask, SIGTERM);
sigaddset(&sv.sa_mask, SIGHUP);
+ sigaddset(&sv.sa_mask, SIGCHLD);
+ sigaddset(&sv.sa_mask, SIGQUIT);
+ sv.sa_flags = SA_RESTART;
+ if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
+ }
+
+ sigemptyset( &sv.sa_mask );
+ sigaddset(&sv.sa_mask, SIGALRM);
sigaddset(&sv.sa_mask, SIGTERM);
+ sigaddset(&sv.sa_mask, SIGUSR1);
+ sigaddset(&sv.sa_mask, SIGCHLD);
+ sigaddset(&sv.sa_mask, SIGQUIT);
sv.sa_flags = SA_RESTART;
- if ( sigaction( SIGHUP, &sv, 0 ) < 0 ) {
- syslog( LOG_ERR, "main: sigaction: %m" );
- afp_exit(1);
+ if ( sigaction( SIGHUP, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
}
- if ( sigaction( SIGTERM, &sv, 0 ) < 0 ) {
- syslog( LOG_ERR, "main: sigaction: %m" );
- afp_exit(1);
+
+ sigemptyset( &sv.sa_mask );
+ sigaddset(&sv.sa_mask, SIGALRM);
+ sigaddset(&sv.sa_mask, SIGHUP);
+ sigaddset(&sv.sa_mask, SIGUSR1);
+ sigaddset(&sv.sa_mask, SIGCHLD);
+ sigaddset(&sv.sa_mask, SIGQUIT);
+ sv.sa_flags = SA_RESTART;
+ if ( sigaction( SIGTERM, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
}
-
- /* afpd.conf: not in config file: lockfile, connections, configfile
+
+ sigemptyset( &sv.sa_mask );
+ sigaddset(&sv.sa_mask, SIGALRM);
+ sigaddset(&sv.sa_mask, SIGHUP);
+ sigaddset(&sv.sa_mask, SIGUSR1);
+ sigaddset(&sv.sa_mask, SIGCHLD);
+ sigaddset(&sv.sa_mask, SIGTERM);
+ sv.sa_flags = SA_RESTART;
+ if (sigaction(SIGQUIT, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
+ afp_exit(EXITERR_SYS);
+ }
+
+ /* afp.conf: not in config file: lockfile, configfile
* preference: command-line provides defaults.
* config file over-writes defaults.
*
*/
sigemptyset(&sigs);
+ sigaddset(&sigs, SIGALRM);
sigaddset(&sigs, SIGHUP);
+ sigaddset(&sigs, SIGUSR1);
+#if 0
+ /* don't block SIGTERM */
sigaddset(&sigs, SIGTERM);
- sigprocmask(SIG_BLOCK, &sigs, NULL);
- if (!(configs = configinit(&default_options))) {
- syslog(LOG_ERR, "main: no servers configured: %m\n");
- afp_exit(1);
- }
- sigprocmask(SIG_UNBLOCK, &sigs, NULL);
+#endif
+ sigaddset(&sigs, SIGCHLD);
- /* watch atp and dsi sockets. */
- FD_ZERO(&save_rfds);
- for (config = configs; config; config = config->next) {
- if (config->fd < 0) /* for proxies */
- continue;
- FD_SET(config->fd, &save_rfds);
+ pthread_sigmask(SIG_BLOCK, &sigs, NULL);
+ if (configinit(&obj) != 0) {
+ LOG(log_error, logtype_afpd, "main: no servers configured");
+ afp_exit(EXITERR_CONF);
}
+ pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
+
+ /* Initialize */
+ cnid_init();
+ /* watch atp, dsi sockets and ipc parent/child file descriptor. */
+
+ if (obj.options.flags & OPTION_KEEPSESSIONS) {
+ LOG(log_note, logtype_afpd, "Activating continuous service");
+ disasociated_ipc_fd = ipc_server_uds(_PATH_AFP_IPC);
+ }
+
+ fd_set_listening_sockets(&obj);
+
+ /* set limits */
+ (void)setlimits();
+
+ afp_child_t *child;
+ int recon_ipc_fd;
+ pid_t pid;
+ int saveerrno;
+
/* wait for an appleshare connection. parent remains in the loop
* while the children get handled by afp_over_{asp,dsi}. this is
* currently vulnerable to a denial-of-service attack if a
* afterwards. establishing timeouts for logins is a possible
* solution. */
while (1) {
- rfds = save_rfds;
- if (select(FD_SETSIZE, &rfds, NULL, NULL, NULL) < 0) {
- if (errno == EINTR)
- continue;
- syslog(LOG_ERR, "main: can't wait for input: %m");
- break;
- }
-
- for (config = configs; config; config = config->next) {
- if (config->fd < 0)
- continue;
- if (FD_ISSET(config->fd, &rfds))
- config->server_start(config, configs, server_children);
- }
- }
+ LOG(log_maxdebug, logtype_afpd, "main: polling %i fds", fdset_used);
+ pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
+ ret = poll(fdset, fdset_used, -1);
+ pthread_sigmask(SIG_BLOCK, &sigs, NULL);
+ saveerrno = errno;
+
+ if (gotsigchld) {
+ gotsigchld = 0;
+ child_handler();
+ continue;
+ }
+
+ if (reloadconfig) {
+ nologin++;
+ auth_unload();
+ fd_reset_listening_sockets(&obj);
+
+ LOG(log_info, logtype_afpd, "re-reading configuration file");
+
+ configfree(&obj, NULL);
+ if (configinit(&obj) != 0) {
+ LOG(log_error, logtype_afpd, "config re-read: no servers configured");
+ afp_exit(EXITERR_CONF);
+ }
+
+ fd_set_listening_sockets(&obj);
+
+ nologin = 0;
+ reloadconfig = 0;
+ errno = saveerrno;
+ continue;
+ }
+
+ if (ret == 0)
+ continue;
+
+ if (ret < 0) {
+ if (errno == EINTR)
+ continue;
+ LOG(log_error, logtype_afpd, "main: can't wait for input: %s", strerror(errno));
+ break;
+ }
+
+ for (int i = 0; i < fdset_used; i++) {
+ if (fdset[i].revents & (POLLIN | POLLERR | POLLHUP | POLLNVAL)) {
+ switch (polldata[i].fdtype) {
+
+ case LISTEN_FD:
+ if (child = dsi_start(&obj, (DSI *)polldata[i].data, server_children)) {
+ /* Add IPC fd to select fd set */
+ fdset_add_fd(obj.options.connections + AFP_LISTENERS + FDSET_SAFETY,
+ &fdset,
+ &polldata,
+ &fdset_used,
+ &fdset_size,
+ child->ipc_fd,
+ IPC_FD,
+ child);
+ }
+ break;
+
+ case IPC_FD:
+ child = (afp_child_t *)polldata[i].data;
+ LOG(log_debug, logtype_afpd, "main: IPC request from child[%u]", child->pid);
+
+ if (ipc_server_read(server_children, child->ipc_fd) != 0) {
+ fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fd);
+ close(child->ipc_fd);
+ child->ipc_fd = -1;
+ if ((obj.options.flags & OPTION_KEEPSESSIONS) && child->disasociated) {
+ LOG(log_note, logtype_afpd, "main: removing reattached child[%u]", child->pid);
+ server_child_remove(server_children, CHILD_DSIFORK, child->pid);
+ }
+ }
+ break;
+
+ case DISASOCIATED_IPC_FD:
+ LOG(log_debug, logtype_afpd, "main: IPC reconnect request");
+ if ((recon_ipc_fd = accept(disasociated_ipc_fd, NULL, NULL)) == -1) {
+ LOG(log_error, logtype_afpd, "main: accept: %s", strerror(errno));
+ break;
+ }
+ if (readt(recon_ipc_fd, &pid, sizeof(pid_t), 0, 1) != sizeof(pid_t)) {
+ LOG(log_error, logtype_afpd, "main: readt: %s", strerror(errno));
+ close(recon_ipc_fd);
+ break;
+ }
+ LOG(log_note, logtype_afpd, "main: IPC reconnect from pid [%u]", pid);
+
+ if ((child = server_child_add(server_children, CHILD_DSIFORK, pid, recon_ipc_fd)) == NULL) {
+ LOG(log_error, logtype_afpd, "main: server_child_add");
+ close(recon_ipc_fd);
+ break;
+ }
+ child->disasociated = 1;
+ fdset_add_fd(obj.options.connections + AFP_LISTENERS + FDSET_SAFETY,
+ &fdset,
+ &polldata,
+ &fdset_used,
+ &fdset_size,
+ recon_ipc_fd,
+ IPC_FD,
+ child);
+ break;
+
+ default:
+ LOG(log_debug, logtype_afpd, "main: IPC request for unknown type");
+ break;
+ } /* switch */
+ } /* if */
+ } /* for (i)*/
+ } /* while (1) */
return 0;
}
+
+static afp_child_t *dsi_start(AFPObj *obj, DSI *dsi, server_child *server_children)
+{
+ afp_child_t *child = NULL;
+
+ if (dsi_getsession(dsi, server_children, obj->options.tickleval, &child) != 0) {
+ LOG(log_error, logtype_afpd, "dsi_start: session error: %s", strerror(errno));
+ return NULL;
+ }
+
+ /* we've forked. */
+ if (child == NULL) {
+ configfree(obj, dsi);
+ afp_over_dsi(obj); /* start a session */
+ exit (0);
+ }
+
+ return child;
+}
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