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(),
56
53
#include <sys/stat.h> /* open() */
57
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
55
struct in6_addr, inet_pton(),
59
57
#include <fcntl.h> /* open() */
60
58
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
60
#include <inttypes.h> /* PRIu16, SCNu16 */
64
61
#include <assert.h> /* assert() */
65
62
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
63
#include <time.h> /* time() */
67
64
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
65
SIOCSIFFLAGS, if_indextoname(),
69
66
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
67
#include <netinet/in.h>
73
68
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
69
getuid(), getgid(), setuid(),
76
71
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
72
#include <iso646.h> /* not, and, or */
78
73
#include <argp.h> /* struct argp_option, error_t, struct
79
74
argp_state, struct argp,
80
75
argp_parse(), ARGP_KEY_ARG,
81
76
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
79
/* All Avahi types, constants and functions
1011
/* stop main loop after sigterm has been called */
1012
static void handle_sigterm(int sig){
1017
signal_received = sig;
1018
int old_errno = errno;
1019
if(mc.simple_poll != NULL){
1020
avahi_simple_poll_quit(mc.simple_poll);
1026
* This function determines if a directory entry in /sys/class/net
1027
* corresponds to an acceptable network device.
1028
* (This function is passed to scandir(3) as a filter function.)
1030
int good_interface(const struct dirent *if_entry){
1032
char *flagname = NULL;
1033
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1039
if(if_entry->d_name[0] == '.'){
1042
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1047
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
/* read line from flags_fd */
1049
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1050
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1051
flagstring[(size_t)to_read] = '\0';
1052
if(flagstring == NULL){
1058
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1075
tmpmax = strtoimax(flagstring, &tmp, 0);
1076
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
and not (isspace(*tmp)))
1078
or tmpmax != (ifreq_flags)tmpmax){
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1087
ifreq_flags flags = (ifreq_flags)tmpmax;
1088
/* Reject the loopback device */
1089
if(flags & IFF_LOOPBACK){
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1096
/* Accept point-to-point devices only if connect_to is specified */
1097
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1104
/* Otherwise, reject non-broadcast-capable devices */
1105
if(not (flags & IFF_BROADCAST)){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1112
/* Accept this device */
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1120
815
int main(int argc, char *argv[]){
1121
AvahiSServiceBrowser *sb = NULL;
1126
int exitcode = EXIT_SUCCESS;
1127
const char *interface = "";
1128
struct ifreq network;
1130
bool take_down_interface = false;
1133
char tempdir[] = "/tmp/mandosXXXXXX";
1134
bool tempdir_created = false;
1135
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1136
const char *seckey = PATHDIR "/" SECKEY;
1137
const char *pubkey = PATHDIR "/" PUBKEY;
1139
bool gnutls_initialized = false;
1140
bool gpgme_initialized = false;
1143
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1144
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1149
/* Lower any group privileges we might have, just to be safe */
1156
/* Lower user privileges (temporarily) */
1168
struct argp_option options[] = {
1169
{ .name = "debug", .key = 128,
1170
.doc = "Debug mode", .group = 3 },
1171
{ .name = "connect", .key = 'c',
1172
.arg = "ADDRESS:PORT",
1173
.doc = "Connect directly to a specific Mandos server",
1175
{ .name = "interface", .key = 'i',
1177
.doc = "Network interface that will be used to search for"
1180
{ .name = "seckey", .key = 's',
1182
.doc = "OpenPGP secret key file base name",
1184
{ .name = "pubkey", .key = 'p',
1186
.doc = "OpenPGP public key file base name",
1188
{ .name = "dh-bits", .key = 129,
1190
.doc = "Bit length of the prime number used in the"
1191
" Diffie-Hellman key exchange",
1193
{ .name = "priority", .key = 130,
1195
.doc = "GnuTLS priority string for the TLS handshake",
1197
{ .name = "delay", .key = 131,
1199
.doc = "Maximum delay to wait for interface startup",
1202
* These reproduce what we would get without ARGP_NO_HELP
1204
{ .name = "help", .key = '?',
1205
.doc = "Give this help list", .group = -1 },
1206
{ .name = "usage", .key = -3,
1207
.doc = "Give a short usage message", .group = -1 },
1208
{ .name = "version", .key = 'V',
1209
.doc = "Print program version", .group = -1 },
1213
error_t parse_opt(int key, char *arg,
1214
struct argp_state *state){
1217
case 128: /* --debug */
1220
case 'c': /* --connect */
1223
case 'i': /* --interface */
1226
case 's': /* --seckey */
1229
case 'p': /* --pubkey */
1232
case 129: /* --dh-bits */
1234
tmpmax = strtoimax(arg, &tmp, 10);
1235
if(errno != 0 or tmp == arg or *tmp != '\0'
1236
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1237
argp_error(state, "Bad number of DH bits");
1239
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1241
case 130: /* --priority */
1244
case 131: /* --delay */
1246
delay = strtof(arg, &tmp);
1247
if(errno != 0 or tmp == arg or *tmp != '\0'){
1248
argp_error(state, "Bad delay");
1252
* These reproduce what we would get without ARGP_NO_HELP
1254
case '?': /* --help */
1255
argp_state_help(state, state->out_stream,
1256
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1257
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1258
case -3: /* --usage */
1259
argp_state_help(state, state->out_stream,
1260
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1261
case 'V': /* --version */
1262
fprintf(state->out_stream, "%s\n", argp_program_version);
1263
exit(argp_err_exit_status);
1266
return ARGP_ERR_UNKNOWN;
1271
struct argp argp = { .options = options, .parser = parse_opt,
1273
.doc = "Mandos client -- Get and decrypt"
1274
" passwords from a Mandos server" };
1275
ret = argp_parse(&argp, argc, argv,
1276
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1283
perror("argp_parse");
1284
exitcode = EX_OSERR;
1287
exitcode = EX_USAGE;
1293
avahi_set_log_function(empty_log);
1296
if(interface[0] == '\0'){
1297
struct dirent **direntries;
1298
ret = scandir(sys_class_net, &direntries, good_interface,
1301
/* Pick the first good interface */
1302
interface = strdup(direntries[0]->d_name);
1304
fprintf(stderr, "Using interface \"%s\"\n", interface);
1306
if(interface == NULL){
1309
exitcode = EXIT_FAILURE;
1315
fprintf(stderr, "Could not find a network interface\n");
1316
exitcode = EXIT_FAILURE;
1321
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1322
from the signal handler */
1323
/* Initialize the pseudo-RNG for Avahi */
1324
srand((unsigned int) time(NULL));
1325
mc.simple_poll = avahi_simple_poll_new();
1326
if(mc.simple_poll == NULL){
1327
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1328
exitcode = EX_UNAVAILABLE;
1332
sigemptyset(&sigterm_action.sa_mask);
1333
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1335
perror("sigaddset");
1336
exitcode = EX_OSERR;
1339
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1341
perror("sigaddset");
1342
exitcode = EX_OSERR;
1345
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1347
perror("sigaddset");
1348
exitcode = EX_OSERR;
1351
/* Need to check if the handler is SIG_IGN before handling:
1352
| [[info:libc:Initial Signal Actions]] |
1353
| [[info:libc:Basic Signal Handling]] |
1355
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1357
perror("sigaction");
1360
if(old_sigterm_action.sa_handler != SIG_IGN){
1361
ret = sigaction(SIGINT, &sigterm_action, NULL);
1363
perror("sigaction");
1364
exitcode = EX_OSERR;
1368
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1370
perror("sigaction");
1373
if(old_sigterm_action.sa_handler != SIG_IGN){
1374
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1376
perror("sigaction");
1377
exitcode = EX_OSERR;
1381
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1383
perror("sigaction");
1386
if(old_sigterm_action.sa_handler != SIG_IGN){
1387
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1389
perror("sigaction");
1390
exitcode = EX_OSERR;
1395
/* If the interface is down, bring it up */
1396
if(strcmp(interface, "none") != 0){
816
AvahiSServiceBrowser *sb = NULL;
819
int exitcode = EXIT_SUCCESS;
820
const char *interface = "eth0";
821
struct ifreq network;
825
char *connect_to = NULL;
826
char tempdir[] = "/tmp/mandosXXXXXX";
827
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
828
const char *seckey = PATHDIR "/" SECKEY;
829
const char *pubkey = PATHDIR "/" PUBKEY;
831
mandos_context mc = { .simple_poll = NULL, .server = NULL,
832
.dh_bits = 1024, .priority = "SECURE256"
833
":!CTYPE-X.509:+CTYPE-OPENPGP" };
834
bool gnutls_initalized = false;
835
bool gpgme_initalized = false;
838
struct argp_option options[] = {
839
{ .name = "debug", .key = 128,
840
.doc = "Debug mode", .group = 3 },
841
{ .name = "connect", .key = 'c',
842
.arg = "ADDRESS:PORT",
843
.doc = "Connect directly to a specific Mandos server",
845
{ .name = "interface", .key = 'i',
847
.doc = "Interface that will be used to search for Mandos"
850
{ .name = "seckey", .key = 's',
852
.doc = "OpenPGP secret key file base name",
854
{ .name = "pubkey", .key = 'p',
856
.doc = "OpenPGP public key file base name",
858
{ .name = "dh-bits", .key = 129,
860
.doc = "Bit length of the prime number used in the"
861
" Diffie-Hellman key exchange",
863
{ .name = "priority", .key = 130,
865
.doc = "GnuTLS priority string for the TLS handshake",
870
error_t parse_opt(int key, char *arg,
871
struct argp_state *state) {
873
case 128: /* --debug */
876
case 'c': /* --connect */
879
case 'i': /* --interface */
882
case 's': /* --seckey */
885
case 'p': /* --pubkey */
888
case 129: /* --dh-bits */
889
ret = sscanf(arg, "%u", &mc.dh_bits);
891
fprintf(stderr, "Bad number of DH bits\n");
895
case 130: /* --priority */
903
return ARGP_ERR_UNKNOWN;
908
struct argp argp = { .options = options, .parser = parse_opt,
910
.doc = "Mandos client -- Get and decrypt"
911
" passwords from a Mandos server" };
912
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
913
if(ret == ARGP_ERR_UNKNOWN){
914
fprintf(stderr, "Unknown error while parsing arguments\n");
915
exitcode = EXIT_FAILURE;
920
/* If the interface is down, bring it up */
922
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
exitcode = EXIT_FAILURE;
928
strcpy(network.ifr_name, interface);
929
ret = ioctl(sd, SIOCGIFFLAGS, &network);
931
perror("ioctl SIOCGIFFLAGS");
932
exitcode = EXIT_FAILURE;
935
if((network.ifr_flags & IFF_UP) == 0){
936
network.ifr_flags |= IFF_UP;
937
ret = ioctl(sd, SIOCSIFFLAGS, &network);
939
perror("ioctl SIOCSIFFLAGS");
940
exitcode = EXIT_FAILURE;
944
ret = (int)TEMP_FAILURE_RETRY(close(sd));
963
ret = init_gnutls_global(&mc, pubkey, seckey);
965
fprintf(stderr, "init_gnutls_global failed\n");
966
exitcode = EXIT_FAILURE;
969
gnutls_initalized = true;
972
if(mkdtemp(tempdir) == NULL){
978
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
979
fprintf(stderr, "gpgme_initalized failed\n");
980
exitcode = EXIT_FAILURE;
983
gpgme_initalized = true;
1397
986
if_index = (AvahiIfIndex) if_nametoindex(interface);
1398
987
if(if_index == 0){
1399
988
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1400
exitcode = EX_UNAVAILABLE;
1408
/* Re-raise priviliges */
1416
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1417
messages about the network interface to mess up the prompt */
1418
ret = klogctl(8, NULL, 5);
1419
bool restore_loglevel = true;
1421
restore_loglevel = false;
1424
#endif /* __linux__ */
1426
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1429
exitcode = EX_OSERR;
1431
if(restore_loglevel){
1432
ret = klogctl(7, NULL, 0);
1437
#endif /* __linux__ */
1438
/* Lower privileges */
1446
strcpy(network.ifr_name, interface);
1447
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1449
perror("ioctl SIOCGIFFLAGS");
1451
if(restore_loglevel){
1452
ret = klogctl(7, NULL, 0);
1457
#endif /* __linux__ */
1458
exitcode = EX_OSERR;
1459
/* Lower privileges */
1467
if((network.ifr_flags & IFF_UP) == 0){
1468
network.ifr_flags |= IFF_UP;
1469
take_down_interface = true;
1470
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1472
take_down_interface = false;
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1474
exitcode = EX_OSERR;
1476
if(restore_loglevel){
1477
ret = klogctl(7, NULL, 0);
1482
#endif /* __linux__ */
1483
/* Lower privileges */
1492
/* sleep checking until interface is running */
1493
for(int i=0; i < delay * 4; i++){
1494
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1496
perror("ioctl SIOCGIFFLAGS");
1497
} else if(network.ifr_flags & IFF_RUNNING){
1500
struct timespec sleeptime = { .tv_nsec = 250000000 };
1501
ret = nanosleep(&sleeptime, NULL);
1502
if(ret == -1 and errno != EINTR){
1503
perror("nanosleep");
1506
if(not take_down_interface){
1507
/* We won't need the socket anymore */
1508
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1514
if(restore_loglevel){
1515
/* Restores kernel loglevel to default */
1516
ret = klogctl(7, NULL, 0);
1521
#endif /* __linux__ */
1522
/* Lower privileges */
1524
if(take_down_interface){
1525
/* Lower privileges */
1531
/* Lower privileges permanently */
1543
ret = init_gnutls_global(pubkey, seckey);
1545
fprintf(stderr, "init_gnutls_global failed\n");
1546
exitcode = EX_UNAVAILABLE;
1549
gnutls_initialized = true;
1556
tempdir_created = true;
1557
if(mkdtemp(tempdir) == NULL){
1558
tempdir_created = false;
1567
if(not init_gpgme(pubkey, seckey, tempdir)){
1568
fprintf(stderr, "init_gpgme failed\n");
1569
exitcode = EX_UNAVAILABLE;
1572
gpgme_initialized = true;
1579
if(connect_to != NULL){
1580
/* Connect directly, do not use Zeroconf */
1581
/* (Mainly meant for debugging) */
1582
char *address = strrchr(connect_to, ':');
1583
if(address == NULL){
1584
fprintf(stderr, "No colon in address\n");
1585
exitcode = EX_USAGE;
1595
tmpmax = strtoimax(address+1, &tmp, 10);
1596
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1597
or tmpmax != (uint16_t)tmpmax){
1598
fprintf(stderr, "Bad port number\n");
1599
exitcode = EX_USAGE;
1607
port = (uint16_t)tmpmax;
1609
address = connect_to;
1610
/* Colon in address indicates IPv6 */
1612
if(strchr(address, ':') != NULL){
1622
ret = start_mandos_communication(address, port, if_index, af);
1628
exitcode = EX_NOHOST;
1631
exitcode = EX_USAGE;
1634
exitcode = EX_IOERR;
1637
exitcode = EX_PROTOCOL;
1640
exitcode = EX_OSERR;
1644
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);
992
if(connect_to != NULL){
993
/* Connect directly, do not use Zeroconf */
994
/* (Mainly meant for debugging) */
995
char *address = strrchr(connect_to, ':');
997
fprintf(stderr, "No colon in address\n");
998
exitcode = EXIT_FAILURE;
1002
ret = sscanf(address+1, "%" SCNu16, &port);
1004
fprintf(stderr, "Bad port number\n");
1005
exitcode = EXIT_FAILURE;
1009
address = connect_to;
1010
ret = start_mandos_communication(address, port, if_index, &mc);
1012
exitcode = EXIT_FAILURE;
1014
exitcode = EXIT_SUCCESS;
1020
avahi_set_log_function(empty_log);
1023
/* Initialize the pseudo-RNG for Avahi */
1024
srand((unsigned int) time(NULL));
1026
/* Allocate main Avahi loop object */
1027
mc.simple_poll = avahi_simple_poll_new();
1028
if(mc.simple_poll == NULL) {
1029
fprintf(stderr, "Avahi: Failed to create simple poll"
1031
exitcode = EXIT_FAILURE;
1036
AvahiServerConfig config;
1037
/* Do not publish any local Zeroconf records */
1038
avahi_server_config_init(&config);
1039
config.publish_hinfo = 0;
1040
config.publish_addresses = 0;
1041
config.publish_workstation = 0;
1042
config.publish_domain = 0;
1044
/* Allocate a new server */
1045
mc.server = avahi_server_new(avahi_simple_poll_get
1046
(mc.simple_poll), &config, NULL,
1049
/* Free the Avahi configuration data */
1050
avahi_server_config_free(&config);
1053
/* Check if creating the Avahi server object succeeded */
1054
if(mc.server == NULL) {
1055
fprintf(stderr, "Failed to create Avahi server: %s\n",
1056
avahi_strerror(error));
1057
exitcode = EXIT_FAILURE;
1061
/* Create the Avahi service browser */
1062
sb = avahi_s_service_browser_new(mc.server, if_index,
1064
"_mandos._tcp", NULL, 0,
1065
browse_callback, &mc);
1067
fprintf(stderr, "Failed to create service browser: %s\n",
1068
avahi_strerror(avahi_server_errno(mc.server)));
1069
exitcode = EXIT_FAILURE;
1073
/* Run the main loop */
1076
fprintf(stderr, "Starting Avahi loop search\n");
1079
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());
1084
fprintf(stderr, "%s exiting\n", argv[0]);
1087
/* Cleanup things */
1089
avahi_s_service_browser_free(sb);
1091
if(mc.server != NULL)
1092
avahi_server_free(mc.server);
1094
if(mc.simple_poll != NULL)
1095
avahi_simple_poll_free(mc.simple_poll);
1097
if(gnutls_initalized){
1098
gnutls_certificate_free_credentials(mc.cred);
1099
gnutls_global_deinit();
1100
gnutls_dh_params_deinit(mc.dh_params);
1103
if(gpgme_initalized){
1104
gpgme_release(mc.ctx);
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1113
if(errno != ENOENT){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1122
if(direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1130
ret = unlink(fullname);
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1140
ret = rmdir(tempdir);
1141
if(ret == -1 and errno != ENOENT){