4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 #include <sys/socket.h>
29 #include <netpacket/packet.h>
30 #include <net/ethernet.h>
37 #include <sys/types.h>
38 #include <arpa/inet.h>
39 #include <sys/ioctl.h>
47 #include <avahi-common/malloc.h>
48 #include <avahi-common/timeval.h>
50 #include <avahi-daemon/setproctitle.h>
52 #include <libdaemon/dfork.h>
53 #include <libdaemon/dsignal.h>
54 #include <libdaemon/dlog.h>
55 #include <libdaemon/dpid.h>
56 #include <libdaemon/dexec.h>
62 #error "avahi-autoipd is only available on Linux for now"
65 /* An implementation of RFC 3927 */
67 /* Constants from the RFC */
72 #define ANNOUNCE_WAIT 2
73 #define ANNOUNCE_NUM 2
74 #define ANNOUNCE_INTERVAL 2
75 #define MAX_CONFLICTS 10
76 #define RATE_LIMIT_INTERVAL 60
77 #define DEFEND_INTERVAL 10
79 #define IPV4LL_NETWORK 0xA9FE0000L
80 #define IPV4LL_NETMASK 0xFFFF0000L
81 #define IPV4LL_HOSTMASK 0x0000FFFFL
83 #define ETHER_ADDRLEN 6
84 #define ARP_PACKET_SIZE (8+4+4+2*ETHER_ADDRLEN)
86 typedef enum ArpOperation {
91 typedef struct ArpPacketInfo {
92 ArpOperation operation;
94 uint32_t sender_ip_address, target_ip_address;
95 uint8_t sender_hw_address[ETHER_ADDRLEN], target_hw_address[ETHER_ADDRLEN];
98 static State state = STATE_START;
99 static int n_iteration = 0;
100 static int n_conflict = 0;
102 static char *interface_name = NULL;
103 static char *pid_file_name = NULL;
104 static uint32_t start_address = 0;
105 static char *argv0 = NULL;
106 static int daemonize = 0;
107 static int wait_for_address = 0;
108 static int use_syslog = 0;
109 static int debug = 0;
110 static int modify_proc_title = 1;
119 } command = DAEMON_RUN;
121 typedef enum CalloutEvent {
129 #define RANDOM_DEVICE "/dev/urandom"
131 #define DEBUG(x) do {\
137 static void init_rand_seed(void) {
141 /* Try to initialize seed from /dev/urandom, to make it a little
142 * less predictable, and to make sure that multiple machines
143 * booted at the same time choose different random seeds. */
144 if ((fd = open(RANDOM_DEVICE, O_RDONLY)) >= 0) {
145 read(fd, &seed, sizeof(seed));
149 /* If the initialization failed by some reason, we add the time to the seed */
150 seed ^= (unsigned) time(NULL);
155 static uint32_t pick_addr(uint32_t old_addr) {
159 unsigned r = (unsigned) rand();
161 /* Reduce to 16 bits */
163 r = (r >> 16) ^ (r & 0xFFFF);
165 addr = htonl(IPV4LL_NETWORK | (uint32_t) r);
167 } while (addr == old_addr);
172 static void* packet_new(const ArpPacketInfo *info, size_t *packet_len) {
177 assert(info->operation == ARP_REQUEST || info->operation == ARP_RESPONSE);
179 *packet_len = ARP_PACKET_SIZE;
180 r = avahi_new0(uint8_t, *packet_len);
182 r[1] = 1; /* HTYPE */
183 r[2] = 8; /* PTYPE */
184 r[4] = ETHER_ADDRLEN; /* HLEN */
186 r[7] = (uint8_t) info->operation;
188 memcpy(r+8, info->sender_hw_address, ETHER_ADDRLEN);
189 memcpy(r+14, &info->sender_ip_address, 4);
190 memcpy(r+18, info->target_hw_address, ETHER_ADDRLEN);
191 memcpy(r+24, &info->target_ip_address, 4);
196 static void *packet_new_probe(uint32_t ip_address, const uint8_t*hw_address, size_t *packet_len) {
199 memset(&info, 0, sizeof(info));
200 info.operation = ARP_REQUEST;
201 memcpy(info.sender_hw_address, hw_address, ETHER_ADDRLEN);
202 info.target_ip_address = ip_address;
204 return packet_new(&info, packet_len);
207 static void *packet_new_announcement(uint32_t ip_address, const uint8_t* hw_address, size_t *packet_len) {
210 memset(&info, 0, sizeof(info));
211 info.operation = ARP_REQUEST;
212 memcpy(info.sender_hw_address, hw_address, ETHER_ADDRLEN);
213 info.target_ip_address = ip_address;
214 info.sender_ip_address = ip_address;
216 return packet_new(&info, packet_len);
219 static int packet_parse(const void *data, size_t packet_len, ArpPacketInfo *info) {
220 const uint8_t *p = data;
224 if (packet_len < ARP_PACKET_SIZE)
227 /* Check HTYPE and PTYPE */
228 if (p[0] != 0 || p[1] != 1 || p[2] != 8 || p[3] != 0)
231 /* Check HLEN, PLEN, OPERATION */
232 if (p[4] != ETHER_ADDRLEN || p[5] != 4 || p[6] != 0 || (p[7] != 1 && p[7] != 2))
235 info->operation = p[7];
236 memcpy(info->sender_hw_address, p+8, ETHER_ADDRLEN);
237 memcpy(&info->sender_ip_address, p+14, 4);
238 memcpy(info->target_hw_address, p+18, ETHER_ADDRLEN);
239 memcpy(&info->target_ip_address, p+24, 4);
244 static void set_state(State st, int reset_counter, uint32_t address) {
245 const char* const state_table[] = {
246 [STATE_START] = "START",
247 [STATE_WAITING_PROBE] = "WAITING_PROBE",
248 [STATE_PROBING] = "PROBING",
249 [STATE_WAITING_ANNOUNCE] = "WAITING_ANNOUNCE",
250 [STATE_ANNOUNCING] = "ANNOUNCING",
251 [STATE_RUNNING] = "RUNNING",
252 [STATE_SLEEPING] = "SLEEPING"
256 assert(st < STATE_MAX);
258 if (st == state && !reset_counter) {
260 DEBUG(daemon_log(LOG_DEBUG, "State iteration %s-%i", state_table[state], n_iteration));
262 DEBUG(daemon_log(LOG_DEBUG, "State transition %s-%i -> %s-0", state_table[state], n_iteration, state_table[st]));
267 if (modify_proc_title) {
268 if (state == STATE_SLEEPING)
269 avahi_set_proc_title("%s: sleeping", argv0);
270 else if (state == STATE_ANNOUNCING)
271 avahi_set_proc_title("%s: announcing %s", argv0, inet_ntop(AF_INET, &address, buf, sizeof(buf)));
272 else if (state == STATE_RUNNING)
273 avahi_set_proc_title("%s: bound %s", argv0, inet_ntop(AF_INET, &address, buf, sizeof(buf)));
275 avahi_set_proc_title("%s: probing %s", argv0, inet_ntop(AF_INET, &address, buf, sizeof(buf)));
279 static int do_callout(CalloutEvent event, int iface, uint32_t addr) {
280 char buf[64], ifname[IFNAMSIZ];
281 const char * const event_table[CALLOUT_MAX] = {
282 [CALLOUT_BIND] = "BIND",
283 [CALLOUT_CONFLICT] = "CONFLICT",
284 [CALLOUT_UNBIND] = "UNBIND",
285 [CALLOUT_STOP] = "STOP"
288 daemon_log(LOG_INFO, "Callout %s, address %s on interface %s",
290 inet_ntop(AF_INET, &addr, buf, sizeof(buf)),
291 if_indextoname(iface, ifname));
296 static int open_socket(int iface, uint8_t *hw_address) {
298 struct sockaddr_ll sa;
301 if ((fd = socket(PF_PACKET, SOCK_DGRAM, 0)) < 0) {
302 daemon_log(LOG_ERR, "socket() failed: %s", strerror(errno));
306 memset(&sa, 0, sizeof(sa));
307 sa.sll_family = AF_PACKET;
308 sa.sll_protocol = htons(ETH_P_ARP);
309 sa.sll_ifindex = iface;
311 if (bind(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
312 daemon_log(LOG_ERR, "bind() failed: %s", strerror(errno));
317 if (getsockname(fd, (struct sockaddr*) &sa, &sa_len) < 0) {
318 daemon_log(LOG_ERR, "getsockname() failed: %s", strerror(errno));
322 if (sa.sll_halen != ETHER_ADDRLEN) {
323 daemon_log(LOG_ERR, "getsockname() returned invalid hardware address.");
327 memcpy(hw_address, sa.sll_addr, ETHER_ADDRLEN);
338 static int send_packet(int fd, int iface, void *packet, size_t packet_len) {
339 struct sockaddr_ll sa;
343 assert(packet_len > 0);
345 memset(&sa, 0, sizeof(sa));
346 sa.sll_family = AF_PACKET;
347 sa.sll_protocol = htons(ETH_P_ARP);
348 sa.sll_ifindex = iface;
349 sa.sll_halen = ETHER_ADDRLEN;
350 memset(sa.sll_addr, 0xFF, ETHER_ADDRLEN);
352 if (sendto(fd, packet, packet_len, 0, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
353 daemon_log(LOG_ERR, "sendto() failed: %s", strerror(errno));
360 static int recv_packet(int fd, void **packet, size_t *packet_len) {
362 struct sockaddr_ll sa;
371 if (ioctl(fd, FIONREAD, &s) < 0) {
372 daemon_log(LOG_ERR, "FIONREAD failed: %s", strerror(errno));
378 *packet_len = (size_t) s;
379 *packet = avahi_new(uint8_t, s);
382 if (recvfrom(fd, *packet, s, 0, (struct sockaddr*) &sa, &sa_len) < 0) {
383 daemon_log(LOG_ERR, "recvfrom() failed: %s", strerror(errno));
396 int is_ll_address(uint32_t addr) {
397 return (ntohl(addr) & IPV4LL_NETMASK) == IPV4LL_NETWORK;
400 static struct timeval *elapse_time(struct timeval *tv, unsigned msec, unsigned jitter) {
403 gettimeofday(tv, NULL);
406 avahi_timeval_add(tv, (AvahiUsec) msec*1000);
409 avahi_timeval_add(tv, (AvahiUsec) (jitter*1000.0*rand()/(RAND_MAX+1.0)));
414 static int loop(int iface, uint32_t addr) {
422 int fd = -1, ret = -1;
423 struct timeval next_wakeup;
424 int next_wakeup_valid = 0;
426 void *in_packet = NULL;
427 size_t in_packet_len;
428 void *out_packet = NULL;
429 size_t out_packet_len;
430 uint8_t hw_address[ETHER_ADDRLEN];
431 struct pollfd pollfds[FD_MAX];
433 Event event = EVENT_NULL;
434 int retval_sent = !daemonize;
437 daemon_signal_init(SIGINT, SIGTERM, SIGCHLD, SIGHUP,0);
439 if ((fd = open_socket(iface, hw_address)) < 0)
442 if ((iface_fd = iface_init(iface)) < 0)
445 if (iface_get_initial_state(&st) < 0)
448 if (addr && !is_ll_address(addr)) {
449 daemon_log(LOG_WARNING, "Requested address %s is not from IPv4LL range 169.254/16, ignoring.", inet_ntop(AF_INET, &addr, buf, sizeof(buf)));
457 for (i = 0; i < ETHER_ADDRLEN; i++)
458 a += hw_address[i]*i;
460 addr = htonl(IPV4LL_NETWORK | (uint32_t) a);
463 set_state(st, 1, addr);
465 daemon_log(LOG_INFO, "Starting with address %s", inet_ntop(AF_INET, &addr, buf, sizeof(buf)));
467 if (state == STATE_SLEEPING)
468 daemon_log(LOG_INFO, "Routable address already assigned, sleeping.");
470 if (!retval_sent && (!wait_for_address || state == STATE_SLEEPING)) {
471 daemon_retval_send(0);
475 memset(pollfds, 0, sizeof(pollfds));
476 pollfds[FD_ARP].fd = fd;
477 pollfds[FD_ARP].events = POLLIN;
478 pollfds[FD_IFACE].fd = iface_fd;
479 pollfds[FD_IFACE].events = POLLIN;
480 pollfds[FD_SIGNAL].fd = daemon_signal_fd();
481 pollfds[FD_SIGNAL].events = POLLIN;
487 if (state == STATE_START) {
489 /* First, wait a random time */
490 set_state(STATE_WAITING_PROBE, 1, addr);
492 elapse_time(&next_wakeup, 0, PROBE_WAIT*1000);
493 next_wakeup_valid = 1;
495 } else if ((state == STATE_WAITING_PROBE && event == EVENT_TIMEOUT) ||
496 (state == STATE_PROBING && event == EVENT_TIMEOUT && n_iteration < PROBE_NUM-2)) {
499 out_packet = packet_new_probe(addr, hw_address, &out_packet_len);
500 set_state(STATE_PROBING, 0, addr);
502 elapse_time(&next_wakeup, PROBE_MIN*1000, (PROBE_MAX-PROBE_MIN)*1000);
503 next_wakeup_valid = 1;
505 } else if (state == STATE_PROBING && event == EVENT_TIMEOUT && n_iteration >= PROBE_NUM-2) {
507 /* Send the last probe */
508 out_packet = packet_new_probe(addr, hw_address, &out_packet_len);
509 set_state(STATE_WAITING_ANNOUNCE, 1, addr);
511 elapse_time(&next_wakeup, ANNOUNCE_WAIT*1000, 0);
512 next_wakeup_valid = 1;
514 } else if ((state == STATE_WAITING_ANNOUNCE && event == EVENT_TIMEOUT) ||
515 (state == STATE_ANNOUNCING && event == EVENT_TIMEOUT && n_iteration < ANNOUNCE_NUM-1)) {
517 /* Send announcement packet */
518 out_packet = packet_new_announcement(addr, hw_address, &out_packet_len);
519 set_state(STATE_ANNOUNCING, 0, addr);
521 elapse_time(&next_wakeup, ANNOUNCE_INTERVAL*1000, 0);
522 next_wakeup_valid = 1;
524 if (n_iteration == 0) {
525 do_callout(CALLOUT_BIND, iface, addr);
529 daemon_retval_send(0);
534 } else if ((state == STATE_ANNOUNCING && event == EVENT_TIMEOUT && n_iteration >= ANNOUNCE_NUM-1)) {
536 daemon_log(LOG_INFO, "Successfully claimed IP address %s", inet_ntop(AF_INET, &addr, buf, sizeof(buf)));
537 set_state(STATE_RUNNING, 0, addr);
539 next_wakeup_valid = 0;
541 } else if (event == EVENT_PACKET) {
546 if (packet_parse(in_packet, in_packet_len, &info) < 0)
547 daemon_log(LOG_WARNING, "Failed to parse incoming ARP packet.");
551 if (info.sender_ip_address == addr) {
552 /* Normal conflict */
554 daemon_log(LOG_INFO, "Recieved conflicting normal ARP packet.");
555 } else if (state == STATE_WAITING_PROBE || state == STATE_PROBING || state == STATE_WAITING_ANNOUNCE) {
557 conflict = info.target_ip_address == addr && memcmp(hw_address, info.sender_hw_address, ETHER_ADDRLEN);
558 daemon_log(LOG_INFO, "Recieved conflicting probe ARP packet.");
563 if (state == STATE_RUNNING || state == STATE_ANNOUNCING)
564 do_callout(CALLOUT_CONFLICT, iface, addr);
566 /* Pick a new address */
567 addr = pick_addr(addr);
569 daemon_log(LOG_INFO, "Trying address %s", inet_ntop(AF_INET, &addr, buf, sizeof(buf)));
573 set_state(STATE_WAITING_PROBE, 1, addr);
575 if (n_conflict >= MAX_CONFLICTS) {
576 daemon_log(LOG_WARNING, "Got too many conflicts, rate limiting new probes.");
577 elapse_time(&next_wakeup, RATE_LIMIT_INTERVAL*1000, PROBE_WAIT*1000);
579 elapse_time(&next_wakeup, 0, PROBE_WAIT*1000);
581 next_wakeup_valid = 1;
583 DEBUG(daemon_log(LOG_DEBUG, "Ignoring irrelevant ARP packet."));
586 } else if (event == EVENT_ROUTABLE_ADDR_CONFIGURED) {
588 daemon_log(LOG_INFO, "A routable address has been configured.");
590 if (state == STATE_RUNNING || state == STATE_ANNOUNCING)
591 do_callout(CALLOUT_UNBIND, iface, addr);
594 daemon_retval_send(0);
598 set_state(STATE_SLEEPING, 1, addr);
599 next_wakeup_valid = 0;
601 } else if (event == EVENT_ROUTABLE_ADDR_UNCONFIGURED && state == STATE_SLEEPING) {
603 daemon_log(LOG_INFO, "No longer a routable address configured, restarting probe process.");
605 set_state(STATE_WAITING_PROBE, 1, addr);
607 elapse_time(&next_wakeup, 0, PROBE_WAIT*1000);
608 next_wakeup_valid = 1;
610 } else if (event == EVENT_REFRESH_REQUEST && state == STATE_RUNNING) {
612 /* The user requested a reannouncing of the address by a SIGHUP */
613 daemon_log(LOG_INFO, "Reannouncing address.");
615 /* Send announcement packet */
616 out_packet = packet_new_announcement(addr, hw_address, &out_packet_len);
617 set_state(STATE_ANNOUNCING, 1, addr);
619 elapse_time(&next_wakeup, ANNOUNCE_INTERVAL*1000, 0);
620 next_wakeup_valid = 1;
624 DEBUG(daemon_log(LOG_DEBUG, "sending..."));
626 if (send_packet(fd, iface, out_packet, out_packet_len) < 0)
629 avahi_free(out_packet);
634 avahi_free(in_packet);
641 if (next_wakeup_valid) {
642 usec = avahi_age(&next_wakeup);
643 timeout = usec < 0 ? (int) (-usec/1000) : 0;
646 DEBUG(daemon_log(LOG_DEBUG, "sleeping %ims", timeout));
648 while ((r = poll(pollfds, FD_MAX, timeout)) < 0 && errno == EINTR)
652 daemon_log(LOG_ERR, "poll() failed: %s", strerror(r));
655 event = EVENT_TIMEOUT;
656 next_wakeup_valid = 0;
659 if (pollfds[FD_ARP].revents == POLLIN) {
660 if (recv_packet(fd, &in_packet, &in_packet_len) < 0)
664 event = EVENT_PACKET;
667 if (event == EVENT_NULL &&
668 pollfds[FD_IFACE].revents == POLLIN) {
670 if (iface_process(&event) < 0)
674 if (event == EVENT_NULL &&
675 pollfds[FD_SIGNAL].revents == POLLIN) {
679 if ((sig = daemon_signal_next()) <= 0) {
680 daemon_log(LOG_ERR, "daemon_signal_next() failed");
687 daemon_log(LOG_INFO, "Got %s, quitting.", sig == SIGINT ? "SIGINT" : "SIGTERM");
692 waitpid(-1, NULL, WNOHANG);
696 event = EVENT_REFRESH_REQUEST;
708 if (state == STATE_RUNNING || state == STATE_ANNOUNCING)
709 do_callout(CALLOUT_STOP, iface, addr);
711 avahi_free(out_packet);
712 avahi_free(in_packet);
720 if (daemonize && !retval_sent)
721 daemon_retval_send(ret);
727 static void help(FILE *f, const char *a0) {
729 "%s [options] INTERFACE\n"
730 " -h --help Show this help\n"
731 " -D --daemonize Daemonize after startup\n"
732 " -s --syslog Write log messages to syslog(3) instead of STDERR\n"
733 " -k --kill Kill a running daemon\n"
734 " -r --refresh Request a running daemon to refresh it's IP address\n"
735 " -c --check Return 0 if a daemon is already running\n"
736 " -V --version Show version\n"
737 " -S --start=ADDRESS Start with this address from the IPv4LL range 169.254.0.0/16\n"
738 " -w --wait Wait until an address has been acquired before daemonizing\n"
739 " --no-proc-title Don't modify process title\n"
740 " --debug Increase verbosity\n",
744 static int parse_command_line(int argc, char *argv[]) {
748 OPTION_NO_PROC_TITLE = 256,
752 static const struct option long_options[] = {
753 { "help", no_argument, NULL, 'h' },
754 { "daemonize", no_argument, NULL, 'D' },
755 { "syslog", no_argument, NULL, 's' },
756 { "kill", no_argument, NULL, 'k' },
757 { "refresh", no_argument, NULL, 'r' },
758 { "check", no_argument, NULL, 'c' },
759 { "version", no_argument, NULL, 'V' },
760 { "start", required_argument, NULL, 'S' },
761 { "wait", no_argument, NULL, 'w' },
762 { "no-proc-title", no_argument, NULL, OPTION_NO_PROC_TITLE },
763 { "debug", no_argument, NULL, OPTION_DEBUG },
768 while ((c = getopt_long(argc, argv, "hDkVrcS:", long_options, NULL)) >= 0) {
775 command = DAEMON_HELP;
781 command = DAEMON_KILL;
784 command = DAEMON_VERSION;
787 command = DAEMON_REFRESH;
790 command = DAEMON_CHECK;
794 if ((start_address = inet_addr(optarg)) == (uint32_t) -1) {
795 fprintf(stderr, "Failed to parse IP address '%s'.", optarg);
800 wait_for_address = 1;
803 case OPTION_NO_PROC_TITLE:
804 modify_proc_title = 0;
812 fprintf(stderr, "Invalid command line argument: %c\n", c);
817 if (command == DAEMON_RUN ||
818 command == DAEMON_KILL ||
819 command == DAEMON_REFRESH ||
820 command == DAEMON_CHECK) {
822 if (optind >= argc) {
823 fprintf(stderr, "Missing interface name.\n");
827 interface_name = argv[optind++];
830 if (optind != argc) {
831 fprintf(stderr, "Too many arguments\n");
838 static const char* pid_file_proc(void) {
839 return pid_file_name;
842 int main(int argc, char*argv[]) {
844 int wrote_pid_file = 0;
846 avahi_init_proc_title(argc, argv);
848 if ((argv0 = strrchr(argv[0], '/')))
853 daemon_pid_file_ident = daemon_log_ident = argv0;
854 daemon_pid_file_proc = pid_file_proc;
856 if (parse_command_line(argc, argv) < 0)
859 pid_file_name = avahi_strdup_printf(AVAHI_RUNTIME_DIR"/avahi-autoipd.%s.pid", interface_name);
861 if (command == DAEMON_RUN) {
867 if ((ifindex = if_nametoindex(interface_name)) <= 0) {
868 daemon_log(LOG_ERR, "Failed to get index for interface name '%s': %s", interface_name, strerror(errno));
873 daemon_log(LOG_ERR, "This program is intended to be run as root.");
877 if ((pid = daemon_pid_file_is_running()) >= 0) {
878 daemon_log(LOG_ERR, "Daemon already running on PID %u", pid);
883 daemon_retval_init();
885 if ((pid = daemon_fork()) < 0)
891 if ((ret = daemon_retval_wait(20)) < 0) {
892 daemon_log(LOG_ERR, "Could not receive return value from daemon process.");
903 if (use_syslog || daemonize)
904 daemon_log_use = DAEMON_LOG_SYSLOG;
908 if (daemon_pid_file_create() < 0) {
909 daemon_log(LOG_ERR, "Failed to create PID file: %s", strerror(errno));
912 daemon_retval_send(1);
917 if (loop(ifindex, start_address) < 0)
921 } else if (command == DAEMON_HELP) {
925 } else if (command == DAEMON_VERSION) {
926 printf("%s "PACKAGE_VERSION"\n", argv0);
929 } else if (command == DAEMON_KILL) {
930 if (daemon_pid_file_kill_wait(SIGTERM, 5) < 0) {
931 daemon_log(LOG_WARNING, "Failed to kill daemon: %s", strerror(errno));
936 } else if (command == DAEMON_REFRESH) {
937 if (daemon_pid_file_kill(SIGHUP) < 0) {
938 daemon_log(LOG_WARNING, "Failed to kill daemon: %s", strerror(errno));
943 } else if (command == DAEMON_CHECK)
944 r = (daemon_pid_file_is_running() >= 0) ? 0 : 1;
950 daemon_retval_done();
953 daemon_pid_file_remove();
960 - chroot/drop privs/caps
962 - store last used address