32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
stdout, ferror(), sscanf */
44
40
#include <stdint.h> /* uint16_t, uint32_t */
45
41
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
#include <stdbool.h> /* bool, false, true */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
#include <stdbool.h> /* bool, true */
49
45
#include <string.h> /* memset(), strcmp(), strlen(),
50
46
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/ioctl.h> /* ioctl */
52
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
49
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
56
52
#include <sys/stat.h> /* open() */
57
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
54
struct in6_addr, inet_pton(),
59
56
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16, SCNu16 */
64
59
#include <assert.h> /* assert() */
65
60
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time(), sleep() */
61
#include <time.h> /* time() */
67
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
63
SIOCSIFFLAGS, if_indextoname(),
69
64
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
65
#include <netinet/in.h>
73
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
67
getuid(), getgid(), setuid(),
76
69
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
70
#include <iso646.h> /* not, and, or */
78
71
#include <argp.h> /* struct argp_option, error_t, struct
79
72
argp_state, struct argp,
80
73
argp_parse(), ARGP_KEY_ARG,
81
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
89
#include <sys/klog.h> /* klogctl() */
90
#endif /* __linux__ */
93
77
/* All Avahi types, constants and functions
1013
/* stop main loop after sigterm has been called */
1014
static void handle_sigterm(int sig){
1019
signal_received = sig;
1020
int old_errno = errno;
1021
if(mc.simple_poll != NULL){
1022
avahi_simple_poll_quit(mc.simple_poll);
1028
* This function determines if a directory entry in /sys/class/net
1029
* corresponds to an acceptable network device.
1030
* (This function is passed to scandir(3) as a filter function.)
1032
int good_interface(const struct dirent *if_entry){
1034
char *flagname = NULL;
1035
if(if_entry->d_name[0] == '.'){
1038
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1051
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1052
/* read line from flags_fd */
1053
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1054
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1055
flagstring[(size_t)to_read] = '\0';
1056
if(flagstring == NULL){
1062
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1079
tmpmax = strtoimax(flagstring, &tmp, 0);
1080
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1081
and not (isspace(*tmp)))
1082
or tmpmax != (ifreq_flags)tmpmax){
1084
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1085
flagstring, if_entry->d_name);
1091
ifreq_flags flags = (ifreq_flags)tmpmax;
1092
/* Reject the loopback device */
1093
if(flags & IFF_LOOPBACK){
1095
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1100
/* Accept point-to-point devices only if connect_to is specified */
1101
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1103
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1108
/* Otherwise, reject non-broadcast-capable devices */
1109
if(not (flags & IFF_BROADCAST)){
1111
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1116
/* Reject non-ARP interfaces (including dummy interfaces) */
1117
if(flags & IFF_NOARP){
1119
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1124
/* Accept this device */
1126
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1132
812
int main(int argc, char *argv[]){
1133
AvahiSServiceBrowser *sb = NULL;
1138
int exitcode = EXIT_SUCCESS;
1139
const char *interface = "";
1140
struct ifreq network;
1142
bool take_down_interface = false;
1145
char tempdir[] = "/tmp/mandosXXXXXX";
1146
bool tempdir_created = false;
1147
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1148
const char *seckey = PATHDIR "/" SECKEY;
1149
const char *pubkey = PATHDIR "/" PUBKEY;
1151
bool gnutls_initialized = false;
1152
bool gpgme_initialized = false;
1155
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1156
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1161
/* Lower any group privileges we might have, just to be safe */
1168
/* Lower user privileges (temporarily) */
1180
struct argp_option options[] = {
1181
{ .name = "debug", .key = 128,
1182
.doc = "Debug mode", .group = 3 },
1183
{ .name = "connect", .key = 'c',
1184
.arg = "ADDRESS:PORT",
1185
.doc = "Connect directly to a specific Mandos server",
1187
{ .name = "interface", .key = 'i',
1189
.doc = "Network interface that will be used to search for"
1192
{ .name = "seckey", .key = 's',
1194
.doc = "OpenPGP secret key file base name",
1196
{ .name = "pubkey", .key = 'p',
1198
.doc = "OpenPGP public key file base name",
1200
{ .name = "dh-bits", .key = 129,
1202
.doc = "Bit length of the prime number used in the"
1203
" Diffie-Hellman key exchange",
1205
{ .name = "priority", .key = 130,
1207
.doc = "GnuTLS priority string for the TLS handshake",
1209
{ .name = "delay", .key = 131,
1211
.doc = "Maximum delay to wait for interface startup",
1214
* These reproduce what we would get without ARGP_NO_HELP
1216
{ .name = "help", .key = '?',
1217
.doc = "Give this help list", .group = -1 },
1218
{ .name = "usage", .key = -3,
1219
.doc = "Give a short usage message", .group = -1 },
1220
{ .name = "version", .key = 'V',
1221
.doc = "Print program version", .group = -1 },
1225
error_t parse_opt(int key, char *arg,
1226
struct argp_state *state){
1229
case 128: /* --debug */
1232
case 'c': /* --connect */
1235
case 'i': /* --interface */
1238
case 's': /* --seckey */
1241
case 'p': /* --pubkey */
1244
case 129: /* --dh-bits */
1246
tmpmax = strtoimax(arg, &tmp, 10);
1247
if(errno != 0 or tmp == arg or *tmp != '\0'
1248
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1249
argp_error(state, "Bad number of DH bits");
1251
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1253
case 130: /* --priority */
1256
case 131: /* --delay */
1258
delay = strtof(arg, &tmp);
1259
if(errno != 0 or tmp == arg or *tmp != '\0'){
1260
argp_error(state, "Bad delay");
1264
* These reproduce what we would get without ARGP_NO_HELP
1266
case '?': /* --help */
1267
argp_state_help(state, state->out_stream,
1268
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1269
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1270
case -3: /* --usage */
1271
argp_state_help(state, state->out_stream,
1272
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1273
case 'V': /* --version */
1274
fprintf(state->out_stream, "%s\n", argp_program_version);
1275
exit(argp_err_exit_status);
1278
return ARGP_ERR_UNKNOWN;
1283
struct argp argp = { .options = options, .parser = parse_opt,
1285
.doc = "Mandos client -- Get and decrypt"
1286
" passwords from a Mandos server" };
1287
ret = argp_parse(&argp, argc, argv,
1288
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1295
perror("argp_parse");
1296
exitcode = EX_OSERR;
1299
exitcode = EX_USAGE;
1305
avahi_set_log_function(empty_log);
1308
if(interface[0] == '\0'){
1309
struct dirent **direntries;
1310
ret = scandir(sys_class_net, &direntries, good_interface,
1313
/* Pick the first good interface */
1314
interface = strdup(direntries[0]->d_name);
1316
fprintf(stderr, "Using interface \"%s\"\n", interface);
1318
if(interface == NULL){
1321
exitcode = EXIT_FAILURE;
1327
fprintf(stderr, "Could not find a network interface\n");
1328
exitcode = EXIT_FAILURE;
1333
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1334
from the signal handler */
1335
/* Initialize the pseudo-RNG for Avahi */
1336
srand((unsigned int) time(NULL));
1337
mc.simple_poll = avahi_simple_poll_new();
1338
if(mc.simple_poll == NULL){
1339
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1340
exitcode = EX_UNAVAILABLE;
1344
sigemptyset(&sigterm_action.sa_mask);
1345
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1347
perror("sigaddset");
1348
exitcode = EX_OSERR;
1351
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1353
perror("sigaddset");
1354
exitcode = EX_OSERR;
1357
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1359
perror("sigaddset");
1360
exitcode = EX_OSERR;
1363
/* Need to check if the handler is SIG_IGN before handling:
1364
| [[info:libc:Initial Signal Actions]] |
1365
| [[info:libc:Basic Signal Handling]] |
1367
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1369
perror("sigaction");
1372
if(old_sigterm_action.sa_handler != SIG_IGN){
1373
ret = sigaction(SIGINT, &sigterm_action, NULL);
1375
perror("sigaction");
1376
exitcode = EX_OSERR;
1380
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1382
perror("sigaction");
1385
if(old_sigterm_action.sa_handler != SIG_IGN){
1386
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1388
perror("sigaction");
1389
exitcode = EX_OSERR;
1393
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1395
perror("sigaction");
1398
if(old_sigterm_action.sa_handler != SIG_IGN){
1399
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1401
perror("sigaction");
1402
exitcode = EX_OSERR;
1407
/* If the interface is down, bring it up */
1408
if(strcmp(interface, "none") != 0){
813
AvahiSServiceBrowser *sb = NULL;
816
int exitcode = EXIT_SUCCESS;
817
const char *interface = "eth0";
818
struct ifreq network;
822
char *connect_to = NULL;
823
char tempdir[] = "/tmp/mandosXXXXXX";
824
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
825
const char *seckey = PATHDIR "/" SECKEY;
826
const char *pubkey = PATHDIR "/" PUBKEY;
828
mandos_context mc = { .simple_poll = NULL, .server = NULL,
829
.dh_bits = 1024, .priority = "SECURE256"
830
":!CTYPE-X.509:+CTYPE-OPENPGP" };
831
bool gnutls_initalized = false;
832
bool gpgme_initalized = false;
835
struct argp_option options[] = {
836
{ .name = "debug", .key = 128,
837
.doc = "Debug mode", .group = 3 },
838
{ .name = "connect", .key = 'c',
839
.arg = "ADDRESS:PORT",
840
.doc = "Connect directly to a specific Mandos server",
842
{ .name = "interface", .key = 'i',
844
.doc = "Interface that will be used to search for Mandos"
847
{ .name = "seckey", .key = 's',
849
.doc = "OpenPGP secret key file base name",
851
{ .name = "pubkey", .key = 'p',
853
.doc = "OpenPGP public key file base name",
855
{ .name = "dh-bits", .key = 129,
857
.doc = "Bit length of the prime number used in the"
858
" Diffie-Hellman key exchange",
860
{ .name = "priority", .key = 130,
862
.doc = "GnuTLS priority string for the TLS handshake",
867
error_t parse_opt (int key, char *arg,
868
struct argp_state *state) {
870
case 128: /* --debug */
873
case 'c': /* --connect */
876
case 'i': /* --interface */
879
case 's': /* --seckey */
882
case 'p': /* --pubkey */
885
case 129: /* --dh-bits */
886
ret = sscanf(arg, "%u", &mc.dh_bits);
887
if(ret == 0 or mc.dh_bits == 0){
888
fprintf(stderr, "Bad number of DH bits\n");
892
case 130: /* --priority */
900
return ARGP_ERR_UNKNOWN;
905
struct argp argp = { .options = options, .parser = parse_opt,
907
.doc = "Mandos client -- Get and decrypt"
908
" passwords from a Mandos server" };
909
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
910
if (ret == ARGP_ERR_UNKNOWN){
911
fprintf(stderr, "Unknown error while parsing arguments\n");
912
exitcode = EXIT_FAILURE;
917
/* If the interface is down, bring it up */
919
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
922
exitcode = EXIT_FAILURE;
925
strcpy(network.ifr_name, interface);
926
ret = ioctl(sd, SIOCGIFFLAGS, &network);
928
perror("ioctl SIOCGIFFLAGS");
929
exitcode = EXIT_FAILURE;
932
if((network.ifr_flags & IFF_UP) == 0){
933
network.ifr_flags |= IFF_UP;
934
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
perror("ioctl SIOCSIFFLAGS");
937
exitcode = EXIT_FAILURE;
941
ret = (int)TEMP_FAILURE_RETRY(close(sd));
960
ret = init_gnutls_global(&mc, pubkey, seckey);
962
fprintf(stderr, "init_gnutls_global failed\n");
963
exitcode = EXIT_FAILURE;
966
gnutls_initalized = true;
969
if(mkdtemp(tempdir) == NULL){
975
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
976
fprintf(stderr, "gpgme_initalized failed\n");
977
exitcode = EXIT_FAILURE;
980
gpgme_initalized = true;
1409
983
if_index = (AvahiIfIndex) if_nametoindex(interface);
1410
984
if(if_index == 0){
1411
985
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1412
exitcode = EX_UNAVAILABLE;
1420
/* Re-raise priviliges */
1428
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1429
messages about the network interface to mess up the prompt */
1430
ret = klogctl(8, NULL, 5);
1431
bool restore_loglevel = true;
1433
restore_loglevel = false;
1436
#endif /* __linux__ */
1438
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1441
exitcode = EX_OSERR;
1443
if(restore_loglevel){
1444
ret = klogctl(7, NULL, 0);
1449
#endif /* __linux__ */
1450
/* Lower privileges */
1458
strcpy(network.ifr_name, interface);
1459
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1461
perror("ioctl SIOCGIFFLAGS");
1463
if(restore_loglevel){
1464
ret = klogctl(7, NULL, 0);
1469
#endif /* __linux__ */
1470
exitcode = EX_OSERR;
1471
/* Lower privileges */
1479
if((network.ifr_flags & IFF_UP) == 0){
1480
network.ifr_flags |= IFF_UP;
1481
take_down_interface = true;
1482
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1484
take_down_interface = false;
1485
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1486
exitcode = EX_OSERR;
1488
if(restore_loglevel){
1489
ret = klogctl(7, NULL, 0);
1494
#endif /* __linux__ */
1495
/* Lower privileges */
1504
/* sleep checking until interface is running */
1505
for(int i=0; i < delay * 4; i++){
1506
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1508
perror("ioctl SIOCGIFFLAGS");
1509
} else if(network.ifr_flags & IFF_RUNNING){
1512
struct timespec sleeptime = { .tv_nsec = 250000000 };
1513
ret = nanosleep(&sleeptime, NULL);
1514
if(ret == -1 and errno != EINTR){
1515
perror("nanosleep");
1518
if(not take_down_interface){
1519
/* We won't need the socket anymore */
1520
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1526
if(restore_loglevel){
1527
/* Restores kernel loglevel to default */
1528
ret = klogctl(7, NULL, 0);
1533
#endif /* __linux__ */
1534
/* Lower privileges */
1536
if(take_down_interface){
1537
/* Lower privileges */
1543
/* Lower privileges permanently */
1555
ret = init_gnutls_global(pubkey, seckey);
1557
fprintf(stderr, "init_gnutls_global failed\n");
1558
exitcode = EX_UNAVAILABLE;
1561
gnutls_initialized = true;
1568
tempdir_created = true;
1569
if(mkdtemp(tempdir) == NULL){
1570
tempdir_created = false;
1579
if(not init_gpgme(pubkey, seckey, tempdir)){
1580
fprintf(stderr, "init_gpgme failed\n");
1581
exitcode = EX_UNAVAILABLE;
1584
gpgme_initialized = true;
1591
if(connect_to != NULL){
1592
/* Connect directly, do not use Zeroconf */
1593
/* (Mainly meant for debugging) */
1594
char *address = strrchr(connect_to, ':');
1595
if(address == NULL){
1596
fprintf(stderr, "No colon in address\n");
1597
exitcode = EX_USAGE;
1607
tmpmax = strtoimax(address+1, &tmp, 10);
1608
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1609
or tmpmax != (uint16_t)tmpmax){
1610
fprintf(stderr, "Bad port number\n");
1611
exitcode = EX_USAGE;
1619
port = (uint16_t)tmpmax;
1621
address = connect_to;
1622
/* Colon in address indicates IPv6 */
1624
if(strchr(address, ':') != NULL){
1634
while(not quit_now){
1635
ret = start_mandos_communication(address, port, if_index, af);
1636
if(quit_now or ret == 0){
1643
exitcode = EXIT_SUCCESS;
1654
AvahiServerConfig config;
1655
/* Do not publish any local Zeroconf records */
1656
avahi_server_config_init(&config);
1657
config.publish_hinfo = 0;
1658
config.publish_addresses = 0;
1659
config.publish_workstation = 0;
1660
config.publish_domain = 0;
1662
/* Allocate a new server */
1663
mc.server = avahi_server_new(avahi_simple_poll_get
1664
(mc.simple_poll), &config, NULL,
1667
/* Free the Avahi configuration data */
1668
avahi_server_config_free(&config);
1671
/* Check if creating the Avahi server object succeeded */
1672
if(mc.server == NULL){
1673
fprintf(stderr, "Failed to create Avahi server: %s\n",
1674
avahi_strerror(error));
1675
exitcode = EX_UNAVAILABLE;
1683
/* Create the Avahi service browser */
1684
sb = avahi_s_service_browser_new(mc.server, if_index,
1685
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1686
NULL, 0, browse_callback, NULL);
1688
fprintf(stderr, "Failed to create service browser: %s\n",
1689
avahi_strerror(avahi_server_errno(mc.server)));
1690
exitcode = EX_UNAVAILABLE;
1698
/* Run the main loop */
1701
fprintf(stderr, "Starting Avahi loop search\n");
1704
avahi_simple_poll_loop(mc.simple_poll);
989
if(connect_to != NULL){
990
/* Connect directly, do not use Zeroconf */
991
/* (Mainly meant for debugging) */
992
char *address = strrchr(connect_to, ':');
994
fprintf(stderr, "No colon in address\n");
995
exitcode = EXIT_FAILURE;
999
ret = sscanf(address+1, "%" SCNu16, &port);
1000
if(ret == 0 or port == 0){
1001
fprintf(stderr, "Bad port number\n");
1002
exitcode = EXIT_FAILURE;
1006
address = connect_to;
1007
ret = start_mandos_communication(address, port, if_index, &mc);
1009
exitcode = EXIT_FAILURE;
1011
exitcode = EXIT_SUCCESS;
1017
avahi_set_log_function(empty_log);
1020
/* Initialize the pseudo-RNG for Avahi */
1021
srand((unsigned int) time(NULL));
1023
/* Allocate main Avahi loop object */
1024
mc.simple_poll = avahi_simple_poll_new();
1025
if (mc.simple_poll == NULL) {
1026
fprintf(stderr, "Avahi: Failed to create simple poll"
1028
exitcode = EXIT_FAILURE;
1033
AvahiServerConfig config;
1034
/* Do not publish any local Zeroconf records */
1035
avahi_server_config_init(&config);
1036
config.publish_hinfo = 0;
1037
config.publish_addresses = 0;
1038
config.publish_workstation = 0;
1039
config.publish_domain = 0;
1041
/* Allocate a new server */
1042
mc.server = avahi_server_new(avahi_simple_poll_get
1043
(mc.simple_poll), &config, NULL,
1046
/* Free the Avahi configuration data */
1047
avahi_server_config_free(&config);
1050
/* Check if creating the Avahi server object succeeded */
1051
if (mc.server == NULL) {
1052
fprintf(stderr, "Failed to create Avahi server: %s\n",
1053
avahi_strerror(error));
1054
exitcode = EXIT_FAILURE;
1058
/* Create the Avahi service browser */
1059
sb = avahi_s_service_browser_new(mc.server, if_index,
1061
"_mandos._tcp", NULL, 0,
1062
browse_callback, &mc);
1064
fprintf(stderr, "Failed to create service browser: %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1066
exitcode = EXIT_FAILURE;
1070
/* Run the main loop */
1073
fprintf(stderr, "Starting Avahi loop search\n");
1076
avahi_simple_poll_loop(mc.simple_poll);
1709
fprintf(stderr, "%s exiting\n", argv[0]);
1712
/* Cleanup things */
1714
avahi_s_service_browser_free(sb);
1716
if(mc.server != NULL)
1717
avahi_server_free(mc.server);
1719
if(mc.simple_poll != NULL)
1720
avahi_simple_poll_free(mc.simple_poll);
1722
if(gnutls_initialized){
1723
gnutls_certificate_free_credentials(mc.cred);
1724
gnutls_global_deinit();
1725
gnutls_dh_params_deinit(mc.dh_params);
1728
if(gpgme_initialized){
1729
gpgme_release(mc.ctx);
1732
/* Take down the network interface */
1733
if(take_down_interface){
1734
/* Re-raise priviliges */
1741
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1743
perror("ioctl SIOCGIFFLAGS");
1744
} else if(network.ifr_flags & IFF_UP) {
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1755
/* Lower privileges permanently */
1764
/* Removes the temp directory used by GPGME */
1765
if(tempdir_created){
1767
struct dirent *direntry;
1768
d = opendir(tempdir);
1770
if(errno != ENOENT){
1775
direntry = readdir(d);
1776
if(direntry == NULL){
1779
/* Skip "." and ".." */
1780
if(direntry->d_name[0] == '.'
1781
and (direntry->d_name[1] == '\0'
1782
or (direntry->d_name[1] == '.'
1783
and direntry->d_name[2] == '\0'))){
1786
char *fullname = NULL;
1787
ret = asprintf(&fullname, "%s/%s", tempdir,
1793
ret = remove(fullname);
1795
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1802
ret = rmdir(tempdir);
1803
if(ret == -1 and errno != ENOENT){
1809
sigemptyset(&old_sigterm_action.sa_mask);
1810
old_sigterm_action.sa_handler = SIG_DFL;
1811
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1812
&old_sigterm_action,
1815
perror("sigaction");
1818
ret = raise(signal_received);
1819
} while(ret != 0 and errno == EINTR);
1824
TEMP_FAILURE_RETRY(pause());
1081
fprintf(stderr, "%s exiting\n", argv[0]);
1084
/* Cleanup things */
1086
avahi_s_service_browser_free(sb);
1088
if (mc.server != NULL)
1089
avahi_server_free(mc.server);
1091
if (mc.simple_poll != NULL)
1092
avahi_simple_poll_free(mc.simple_poll);
1094
if (gnutls_initalized){
1095
gnutls_certificate_free_credentials(mc.cred);
1096
gnutls_global_deinit ();
1097
gnutls_dh_params_deinit(mc.dh_params);
1100
if(gpgme_initalized){
1101
gpgme_release(mc.ctx);
1104
/* Removes the temp directory used by GPGME */
1105
if(tempdir[0] != '\0'){
1107
struct dirent *direntry;
1108
d = opendir(tempdir);
1110
if(errno != ENOENT){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1127
ret = unlink(fullname);
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1137
ret = rmdir(tempdir);
1138
if(ret == -1 and errno != ENOENT){