int main(int argc, char *argv[]) {
ipc_server srv = ipc_create("echo_socket");
char buf[128];
while (1) {
/* call accept */
puts("waiting for connection");
ipc_server_accept(&srv);
puts("connected!");
/* handle connection and loop back to accept*/
while (ipc_server_read(&srv, buf, 128)) {
printf("-> '%.*s'\n", srv.msglen - 1, buf);
if (!strncmp(buf, "end", 3)) {
puts("closing");
ipc_server_close(srv);
exit(0);
}
ipc_server_send(&srv, buf, srv.msglen);
}
puts("client closed connection");
}
return 0;
}
int main(int ac, char **av)
{
AFPConfig *config;
fd_set rfds;
void *ipc;
struct sigaction sv;
sigset_t sigs;
int ret;
#ifdef TRU64
argc = ac;
argv = av;
set_auth_parameters( ac, av );
#endif /* TRU64 */
/* Log SIGBUS/SIGSEGV SBT */
fault_setup(NULL);
/* Default log setup: log to syslog */
setuplog("default log_note");
afp_options_init(&default_options);
if (!afp_options_parse(ac, av, &default_options))
exit(EXITERR_CONF);
/* Save the user's current umask for use with CNID (and maybe some
* other things, too). */
default_options.save_mask = umask( default_options.umask );
switch(server_lock("afpd", default_options.pidfile,
default_options.flags & OPTION_DEBUG)) {
case -1: /* error */
exit(EXITERR_SYS);
case 0: /* child */
break;
default: /* server */
exit(0);
}
atexit(afp_exit);
/* 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))) {
LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) );
exit(EXITERR_SYS);
}
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) );
exit(EXITERR_SYS);
}
#endif
sv.sa_handler = child_handler;
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, NULL ) < 0 ) {
LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
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) );
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, NULL ) < 0 ) {
LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
exit(EXITERR_SYS);
}
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) );
exit(EXITERR_SYS);
}
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) );
exit(EXITERR_SYS);
}
/* afpd.conf: not in config file: lockfile, connections, configfile
* preference: command-line provides defaults.
* config file over-writes defaults.
*
* we also need to make sure that killing afpd during startup
* won't leave any lingering registered names around.
*/
sigemptyset(&sigs);
sigaddset(&sigs, SIGALRM);
sigaddset(&sigs, SIGHUP);
sigaddset(&sigs, SIGUSR1);
#if 0
/* don't block SIGTERM */
sigaddset(&sigs, SIGTERM);
#endif
sigaddset(&sigs, SIGCHLD);
pthread_sigmask(SIG_BLOCK, &sigs, NULL);
if (!(configs = configinit(&default_options))) {
LOG(log_error, logtype_afpd, "main: no servers configured");
exit(EXITERR_CONF);
}
pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
/* Register CNID */
cnid_init();
/* watch atp, dsi sockets and ipc parent/child file descriptor. */
disasociated_ipc_fd = ipc_server_uds(_PATH_AFP_IPC);
fd_set_listening_sockets();
/* set limits */
(void)setlimits();
afp_child_t *child;
int fd[2]; /* we only use one, but server_child_add expects [2] */
pid_t pid;
/* 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
* connection is made without an actual login attempt being made
* afterwards. establishing timeouts for logins is a possible
* solution. */
while (1) {
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);
int saveerrno = errno;
if (reloadconfig) {
nologin++;
auth_unload();
fd_reset_listening_sockets();
LOG(log_info, logtype_afpd, "re-reading configuration file");
for (config = configs; config; config = config->next)
if (config->server_cleanup)
config->server_cleanup(config);
/* configfree close atp socket used for DDP tickle, there's an issue
* with atp tid. */
configfree(configs, NULL);
if (!(configs = configinit(&default_options))) {
LOG(log_error, logtype_afpd, "config re-read: no servers configured");
exit(EXITERR_CONF);
}
fd_set_listening_sockets();
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)) {
switch (polldata[i].fdtype) {
case LISTEN_FD:
config = (AFPConfig *)polldata[i].data;
/* config->server_start is afp_config.c:dsi_start() for DSI */
if (child = config->server_start(config, configs, server_children)) {
/* Add IPC fd to select fd set */
fdset_add_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0], 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_fds[0]) != 0) {
fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0]);
close(child->ipc_fds[0]);
child->ipc_fds[0] = -1;
if (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 ((fd[0] = accept(disasociated_ipc_fd, NULL, NULL)) == -1) {
LOG(log_error, logtype_afpd, "main: accept: %s", strerror(errno));
break;
}
if (readt(fd[0], &pid, sizeof(pid_t), 0, 1) != sizeof(pid_t)) {
LOG(log_error, logtype_afpd, "main: readt: %s", strerror(errno));
close(fd[0]);
break;
}
LOG(log_note, logtype_afpd, "main: IPC reconnect from pid [%u]", pid);
if ((child = server_child_add(server_children, CHILD_DSIFORK, pid, fd)) == NULL) {
LOG(log_error, logtype_afpd, "main: server_child_add");
close(fd[0]);
break;
}
child->disasociated = 1;
fdset_add_fd(&fdset, &polldata, &fdset_used, &fdset_size, fd[0], 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;
}
/* Receive command from the smcroute client */
static int read_ipc_command(void)
{
const char *str;
struct cmd *packet;
struct mroute mroute;
uint8 buf[MX_CMDPKT_SZ];
memset(buf, 0, sizeof(buf));
packet = ipc_server_read(buf, sizeof(buf));
if (!packet) {
/* Skip logging client disconnects */
if (errno != ECONNRESET)
smclog(LOG_WARNING, errno, "Failed receving IPC message from client");
return 1;
}
switch (packet->cmd) {
case 'a':
case 'r':
if ((str = cmd_convert_to_mroute(&mroute, packet))) {
smclog(LOG_WARNING, 0, str);
ipc_send(log_last_message, strlen(log_last_message) + 1);
break;
}
if (mroute.version == 4) {
if ((packet->cmd == 'a' && mroute4_add(&mroute.u.mroute4))
|| (packet->cmd == 'r' && mroute4_del(&mroute.u.mroute4))) {
ipc_send(log_last_message, strlen(log_last_message) + 1);
break;
}
} else {
#ifndef HAVE_IPV6_MULTICAST_ROUTING
smclog(LOG_WARNING, 0, "IPv6 multicast routing support disabled.");
#else
if ((packet->cmd == 'a' && mroute6_add(&mroute.u.mroute6))
|| (packet->cmd == 'r' && mroute6_del(&mroute.u.mroute6))) {
ipc_send(log_last_message, strlen(log_last_message) + 1);
break;
}
#endif /* HAVE_IPV6_MULTICAST_ROUTING */
}
ipc_send("", 1);
break;
case 'j': /* j <InputIntf> <McGroupAdr> */
case 'l': /* l <InputIntf> <McGroupAdr> */
{
int result = -1;
const char *ifname = (const char *)(packet + 1);
const char *groupstr = ifname + strlen(ifname) + 1;
if (strchr(groupstr, ':') == NULL) {
struct in_addr group;
/* check multicast address */
if (!*groupstr
|| !inet_aton(groupstr, &group)
|| !IN_MULTICAST(ntohl(group.s_addr))) {
smclog(LOG_WARNING, 0, "Invalid multicast group: %s", groupstr);
ipc_send(log_last_message, strlen(log_last_message) + 1);
break;
}
/* join or leave */
if (packet->cmd == 'j')
result = mcgroup4_join(ifname, group);
else
result = mcgroup4_leave(ifname, group);
} else { /* IPv6 */
#ifndef HAVE_IPV6_MULTICAST_HOST
smclog(LOG_WARNING, 0, "IPv6 multicast support disabled.");
#else
struct in6_addr group;
/* check multicast address */
if (!*groupstr
|| (inet_pton(AF_INET6, groupstr, &group) <= 0)
|| !IN6_IS_ADDR_MULTICAST(&group)) {
smclog(LOG_WARNING, 0, "Invalid multicast group: %s", groupstr);
ipc_send(log_last_message, strlen(log_last_message) + 1);
break;
}
/* join or leave */
if (packet->cmd == 'j')
result = mcgroup6_join(ifname, group);
else
result = mcgroup6_leave(ifname, group);
#endif /* HAVE_IPV6_MULTICAST_HOST */
}
/* failed */
if (result) {
ipc_send(log_last_message, strlen(log_last_message) + 1);
break;
}
ipc_send("", 1);
break;
}
case 'k':
ipc_send("", 1);
exit(0);
}
return 0;
}
int main(int ac, char **av)
{
fd_set rfds;
void *ipc;
struct sigaction sv;
sigset_t sigs;
int ret;
/* Parse argv args and initialize default options */
afp_options_parse_cmdline(&obj, ac, av);
if (!(obj.cmdlineflags & OPTION_DEBUG) && (daemonize(0, 0) != 0))
exit(EXITERR_SYS);
/* 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(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, 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, 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, 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, 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);
}
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.
*
* we also need to make sure that killing afpd during startup
* won't leave any lingering registered names around.
*/
sigemptyset(&sigs);
sigaddset(&sigs, SIGALRM);
sigaddset(&sigs, SIGHUP);
sigaddset(&sigs, SIGUSR1);
#if 0
/* don't block SIGTERM */
sigaddset(&sigs, SIGTERM);
#endif
sigaddset(&sigs, SIGCHLD);
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 continous 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
* connection is made without an actual login attempt being made
* afterwards. establishing timeouts for logins is a possible
* solution. */
while (1) {
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;
}
