32
31
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
32
#define _LARGEFILE_SOURCE
36
#ifndef _FILE_OFFSET_BITS
37
33
#define _FILE_OFFSET_BITS 64
40
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
39
#include <stdint.h> /* uint16_t, uint32_t */
45
40
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
#include <stdbool.h> /* bool, false, true */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
#include <stdbool.h> /* bool, true */
49
44
#include <string.h> /* memset(), strcmp(), strlen(),
50
45
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
46
#include <sys/ioctl.h> /* ioctl */
52
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
48
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
56
#include <sys/stat.h> /* open() */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
51
#include <inttypes.h> /* PRIu16 */
57
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
53
struct in6_addr, inet_pton(),
64
55
#include <assert.h> /* assert() */
65
56
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time(), sleep() */
57
#include <time.h> /* time() */
67
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
59
SIOCSIFFLAGS, if_indextoname(),
69
60
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
73
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
62
getuid(), getgid(), setuid(),
64
#include <netinet/in.h>
76
65
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
66
#include <iso646.h> /* not, and */
78
67
#include <argp.h> /* struct argp_option, error_t, struct
79
68
argp_state, struct argp,
80
69
argp_parse(), ARGP_KEY_ARG,
81
70
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
73
/* 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
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
747
/* Combines file name and path and returns the malloced new
748
string. some sane checks could/should be added */
749
static char *combinepath(const char *first, const char *second){
751
int ret = asprintf(&tmp, "%s/%s", first, second);
1041
if(if_entry->d_name[0] == '.'){
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1090
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1098
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1106
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1114
/* Accept this device */
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1122
759
int main(int argc, char *argv[]){
1123
AvahiSServiceBrowser *sb = NULL;
1128
int exitcode = EXIT_SUCCESS;
1129
const char *interface = "";
1130
struct ifreq network;
1132
bool take_down_interface = false;
1135
char tempdir[] = "/tmp/mandosXXXXXX";
1136
bool tempdir_created = false;
1137
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1138
const char *seckey = PATHDIR "/" SECKEY;
1139
const char *pubkey = PATHDIR "/" PUBKEY;
1141
bool gnutls_initialized = false;
1142
bool gpgme_initialized = false;
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1151
/* Lower any group privileges we might have, just to be safe */
1158
/* Lower user privileges (temporarily) */
1170
struct argp_option options[] = {
1171
{ .name = "debug", .key = 128,
1172
.doc = "Debug mode", .group = 3 },
1173
{ .name = "connect", .key = 'c',
1174
.arg = "ADDRESS:PORT",
1175
.doc = "Connect directly to a specific Mandos server",
1177
{ .name = "interface", .key = 'i',
1179
.doc = "Network interface that will be used to search for"
1182
{ .name = "seckey", .key = 's',
1184
.doc = "OpenPGP secret key file base name",
1186
{ .name = "pubkey", .key = 'p',
1188
.doc = "OpenPGP public key file base name",
1190
{ .name = "dh-bits", .key = 129,
1192
.doc = "Bit length of the prime number used in the"
1193
" Diffie-Hellman key exchange",
1195
{ .name = "priority", .key = 130,
1197
.doc = "GnuTLS priority string for the TLS handshake",
1199
{ .name = "delay", .key = 131,
1201
.doc = "Maximum delay to wait for interface startup",
1204
* These reproduce what we would get without ARGP_NO_HELP
1206
{ .name = "help", .key = '?',
1207
.doc = "Give this help list", .group = -1 },
1208
{ .name = "usage", .key = -3,
1209
.doc = "Give a short usage message", .group = -1 },
1210
{ .name = "version", .key = 'V',
1211
.doc = "Print program version", .group = -1 },
1215
error_t parse_opt(int key, char *arg,
1216
struct argp_state *state){
1219
case 128: /* --debug */
1222
case 'c': /* --connect */
1225
case 'i': /* --interface */
1228
case 's': /* --seckey */
1231
case 'p': /* --pubkey */
1234
case 129: /* --dh-bits */
1236
tmpmax = strtoimax(arg, &tmp, 10);
1237
if(errno != 0 or tmp == arg or *tmp != '\0'
1238
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1239
argp_error(state, "Bad number of DH bits");
1241
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1243
case 130: /* --priority */
1246
case 131: /* --delay */
1248
delay = strtof(arg, &tmp);
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1250
argp_error(state, "Bad delay");
1254
* These reproduce what we would get without ARGP_NO_HELP
1256
case '?': /* --help */
1257
argp_state_help(state, state->out_stream,
1258
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1259
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1260
case -3: /* --usage */
1261
argp_state_help(state, state->out_stream,
1262
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1263
case 'V': /* --version */
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1265
exit(argp_err_exit_status);
1268
return ARGP_ERR_UNKNOWN;
1273
struct argp argp = { .options = options, .parser = parse_opt,
1275
.doc = "Mandos client -- Get and decrypt"
1276
" passwords from a Mandos server" };
1277
ret = argp_parse(&argp, argc, argv,
1278
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1285
perror("argp_parse");
1286
exitcode = EX_OSERR;
1289
exitcode = EX_USAGE;
1295
avahi_set_log_function(empty_log);
1298
if(interface[0] == '\0'){
1299
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1303
/* Pick the first good interface */
1304
interface = strdup(direntries[0]->d_name);
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1308
if(interface == NULL){
760
AvahiSServiceBrowser *sb = NULL;
763
int exitcode = EXIT_SUCCESS;
764
const char *interface = "eth0";
765
struct ifreq network;
769
char *connect_to = NULL;
770
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
771
char *pubkeyfilename = NULL;
772
char *seckeyfilename = NULL;
773
const char *pubkeyname = "pubkey.txt";
774
const char *seckeyname = "seckey.txt";
775
mandos_context mc = { .simple_poll = NULL, .server = NULL,
776
.dh_bits = 1024, .priority = "SECURE256"
777
":!CTYPE-X.509:+CTYPE-OPENPGP" };
778
bool gnutls_initalized = false;
781
struct argp_option options[] = {
782
{ .name = "debug", .key = 128,
783
.doc = "Debug mode", .group = 3 },
784
{ .name = "connect", .key = 'c',
785
.arg = "ADDRESS:PORT",
786
.doc = "Connect directly to a specific Mandos server",
788
{ .name = "interface", .key = 'i',
790
.doc = "Interface that will be used to search for Mandos"
793
{ .name = "keydir", .key = 'd',
795
.doc = "Directory to read the OpenPGP key files from",
797
{ .name = "seckey", .key = 's',
799
.doc = "OpenPGP secret key file base name",
801
{ .name = "pubkey", .key = 'p',
803
.doc = "OpenPGP public key file base name",
805
{ .name = "dh-bits", .key = 129,
807
.doc = "Bit length of the prime number used in the"
808
" Diffie-Hellman key exchange",
810
{ .name = "priority", .key = 130,
812
.doc = "GnuTLS priority string for the TLS handshake",
817
error_t parse_opt (int key, char *arg,
818
struct argp_state *state) {
819
/* Get the INPUT argument from `argp_parse', which we know is
820
a pointer to our plugin list pointer. */
822
case 128: /* --debug */
825
case 'c': /* --connect */
828
case 'i': /* --interface */
831
case 'd': /* --keydir */
834
case 's': /* --seckey */
837
case 'p': /* --pubkey */
840
case 129: /* --dh-bits */
842
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
848
case 130: /* --priority */
856
return ARGP_ERR_UNKNOWN;
861
struct argp argp = { .options = options, .parser = parse_opt,
863
.doc = "Mandos client -- Get and decrypt"
864
" passwords from a Mandos server" };
865
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
866
if (ret == ARGP_ERR_UNKNOWN){
867
fprintf(stderr, "Unknown error while parsing arguments\n");
1311
868
exitcode = EXIT_FAILURE;
873
pubkeyfilename = combinepath(keydir, pubkeyname);
874
if (pubkeyfilename == NULL){
875
perror("combinepath");
876
exitcode = EXIT_FAILURE;
880
seckeyfilename = combinepath(keydir, seckeyname);
881
if (seckeyfilename == NULL){
882
perror("combinepath");
883
exitcode = EXIT_FAILURE;
887
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
889
fprintf(stderr, "init_gnutls_global failed\n");
890
exitcode = EXIT_FAILURE;
1317
fprintf(stderr, "Could not find a network interface\n");
1318
exitcode = EXIT_FAILURE;
1323
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1324
from the signal handler */
1325
/* Initialize the pseudo-RNG for Avahi */
1326
srand((unsigned int) time(NULL));
1327
mc.simple_poll = avahi_simple_poll_new();
1328
if(mc.simple_poll == NULL){
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1330
exitcode = EX_UNAVAILABLE;
1334
sigemptyset(&sigterm_action.sa_mask);
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1337
perror("sigaddset");
1338
exitcode = EX_OSERR;
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1343
perror("sigaddset");
1344
exitcode = EX_OSERR;
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1349
perror("sigaddset");
1350
exitcode = EX_OSERR;
1353
/* Need to check if the handler is SIG_IGN before handling:
1354
| [[info:libc:Initial Signal Actions]] |
1355
| [[info:libc:Basic Signal Handling]] |
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1359
perror("sigaction");
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
1365
perror("sigaction");
1366
exitcode = EX_OSERR;
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1372
perror("sigaction");
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1378
perror("sigaction");
1379
exitcode = EX_OSERR;
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1385
perror("sigaction");
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1391
perror("sigaction");
1392
exitcode = EX_OSERR;
1397
/* If the interface is down, bring it up */
1398
if(strcmp(interface, "none") != 0){
893
gnutls_initalized = true;
896
/* If the interface is down, bring it up */
898
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
901
exitcode = EXIT_FAILURE;
904
strcpy(network.ifr_name, interface);
905
ret = ioctl(sd, SIOCGIFFLAGS, &network);
907
perror("ioctl SIOCGIFFLAGS");
908
exitcode = EXIT_FAILURE;
911
if((network.ifr_flags & IFF_UP) == 0){
912
network.ifr_flags |= IFF_UP;
913
ret = ioctl(sd, SIOCSIFFLAGS, &network);
915
perror("ioctl SIOCSIFFLAGS");
916
exitcode = EXIT_FAILURE;
1399
936
if_index = (AvahiIfIndex) if_nametoindex(interface);
1400
937
if(if_index == 0){
1401
938
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1402
exitcode = EX_UNAVAILABLE;
1410
/* Re-raise priviliges */
1418
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1419
messages about the network interface to mess up the prompt */
1420
ret = klogctl(8, NULL, 5);
1421
bool restore_loglevel = true;
1423
restore_loglevel = false;
1426
#endif /* __linux__ */
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1431
exitcode = EX_OSERR;
1433
if(restore_loglevel){
1434
ret = klogctl(7, NULL, 0);
1439
#endif /* __linux__ */
1440
/* Lower privileges */
1448
strcpy(network.ifr_name, interface);
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1451
perror("ioctl SIOCGIFFLAGS");
1453
if(restore_loglevel){
1454
ret = klogctl(7, NULL, 0);
1459
#endif /* __linux__ */
1460
exitcode = EX_OSERR;
1461
/* Lower privileges */
1469
if((network.ifr_flags & IFF_UP) == 0){
1470
network.ifr_flags |= IFF_UP;
1471
take_down_interface = true;
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1474
take_down_interface = false;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1476
exitcode = EX_OSERR;
1478
if(restore_loglevel){
1479
ret = klogctl(7, NULL, 0);
1484
#endif /* __linux__ */
1485
/* Lower privileges */
1494
/* sleep checking until interface is running */
1495
for(int i=0; i < delay * 4; i++){
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1498
perror("ioctl SIOCGIFFLAGS");
1499
} else if(network.ifr_flags & IFF_RUNNING){
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
1503
ret = nanosleep(&sleeptime, NULL);
1504
if(ret == -1 and errno != EINTR){
1505
perror("nanosleep");
1508
if(not take_down_interface){
1509
/* We won't need the socket anymore */
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1516
if(restore_loglevel){
1517
/* Restores kernel loglevel to default */
1518
ret = klogctl(7, NULL, 0);
1523
#endif /* __linux__ */
1524
/* Lower privileges */
1526
if(take_down_interface){
1527
/* Lower privileges */
1533
/* Lower privileges permanently */
1545
ret = init_gnutls_global(pubkey, seckey);
1547
fprintf(stderr, "init_gnutls_global failed\n");
1548
exitcode = EX_UNAVAILABLE;
1551
gnutls_initialized = true;
1558
tempdir_created = true;
1559
if(mkdtemp(tempdir) == NULL){
1560
tempdir_created = false;
1569
if(not init_gpgme(pubkey, seckey, tempdir)){
1570
fprintf(stderr, "init_gpgme failed\n");
1571
exitcode = EX_UNAVAILABLE;
1574
gpgme_initialized = true;
1581
if(connect_to != NULL){
1582
/* Connect directly, do not use Zeroconf */
1583
/* (Mainly meant for debugging) */
1584
char *address = strrchr(connect_to, ':');
1585
if(address == NULL){
1586
fprintf(stderr, "No colon in address\n");
1587
exitcode = EX_USAGE;
1597
tmpmax = strtoimax(address+1, &tmp, 10);
1598
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1599
or tmpmax != (uint16_t)tmpmax){
1600
fprintf(stderr, "Bad port number\n");
1601
exitcode = EX_USAGE;
1609
port = (uint16_t)tmpmax;
1611
address = connect_to;
1612
/* Colon in address indicates IPv6 */
1614
if(strchr(address, ':') != NULL){
1624
while(not quit_now){
1625
ret = start_mandos_communication(address, port, if_index, af);
1626
if(quit_now or ret == 0){
1633
exitcode = EXIT_SUCCESS;
1644
AvahiServerConfig config;
1645
/* Do not publish any local Zeroconf records */
1646
avahi_server_config_init(&config);
1647
config.publish_hinfo = 0;
1648
config.publish_addresses = 0;
1649
config.publish_workstation = 0;
1650
config.publish_domain = 0;
1652
/* Allocate a new server */
1653
mc.server = avahi_server_new(avahi_simple_poll_get
1654
(mc.simple_poll), &config, NULL,
1657
/* Free the Avahi configuration data */
1658
avahi_server_config_free(&config);
1661
/* Check if creating the Avahi server object succeeded */
1662
if(mc.server == NULL){
1663
fprintf(stderr, "Failed to create Avahi server: %s\n",
1664
avahi_strerror(error));
1665
exitcode = EX_UNAVAILABLE;
1673
/* Create the Avahi service browser */
1674
sb = avahi_s_service_browser_new(mc.server, if_index,
1675
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1676
NULL, 0, browse_callback, NULL);
1678
fprintf(stderr, "Failed to create service browser: %s\n",
1679
avahi_strerror(avahi_server_errno(mc.server)));
1680
exitcode = EX_UNAVAILABLE;
1688
/* Run the main loop */
1691
fprintf(stderr, "Starting Avahi loop search\n");
1694
avahi_simple_poll_loop(mc.simple_poll);
942
if(connect_to != NULL){
943
/* Connect directly, do not use Zeroconf */
944
/* (Mainly meant for debugging) */
945
char *address = strrchr(connect_to, ':');
947
fprintf(stderr, "No colon in address\n");
948
exitcode = EXIT_FAILURE;
952
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
954
perror("Bad port number");
955
exitcode = EXIT_FAILURE;
959
address = connect_to;
960
ret = start_mandos_communication(address, port, if_index, &mc);
962
exitcode = EXIT_FAILURE;
964
exitcode = EXIT_SUCCESS;
970
avahi_set_log_function(empty_log);
973
/* Initialize the pseudo-RNG for Avahi */
974
srand((unsigned int) time(NULL));
976
/* Allocate main Avahi loop object */
977
mc.simple_poll = avahi_simple_poll_new();
978
if (mc.simple_poll == NULL) {
979
fprintf(stderr, "Avahi: Failed to create simple poll"
981
exitcode = EXIT_FAILURE;
986
AvahiServerConfig config;
987
/* Do not publish any local Zeroconf records */
988
avahi_server_config_init(&config);
989
config.publish_hinfo = 0;
990
config.publish_addresses = 0;
991
config.publish_workstation = 0;
992
config.publish_domain = 0;
994
/* Allocate a new server */
995
mc.server = avahi_server_new(avahi_simple_poll_get
996
(mc.simple_poll), &config, NULL,
999
/* Free the Avahi configuration data */
1000
avahi_server_config_free(&config);
1003
/* Check if creating the Avahi server object succeeded */
1004
if (mc.server == NULL) {
1005
fprintf(stderr, "Failed to create Avahi server: %s\n",
1006
avahi_strerror(error));
1007
exitcode = EXIT_FAILURE;
1011
/* Create the Avahi service browser */
1012
sb = avahi_s_service_browser_new(mc.server, if_index,
1014
"_mandos._tcp", NULL, 0,
1015
browse_callback, &mc);
1017
fprintf(stderr, "Failed to create service browser: %s\n",
1018
avahi_strerror(avahi_server_errno(mc.server)));
1019
exitcode = EXIT_FAILURE;
1023
/* Run the main loop */
1026
fprintf(stderr, "Starting Avahi loop search\n");
1029
avahi_simple_poll_loop(mc.simple_poll);
1699
fprintf(stderr, "%s exiting\n", argv[0]);
1702
/* Cleanup things */
1704
avahi_s_service_browser_free(sb);
1706
if(mc.server != NULL)
1707
avahi_server_free(mc.server);
1709
if(mc.simple_poll != NULL)
1710
avahi_simple_poll_free(mc.simple_poll);
1712
if(gnutls_initialized){
1713
gnutls_certificate_free_credentials(mc.cred);
1714
gnutls_global_deinit();
1715
gnutls_dh_params_deinit(mc.dh_params);
1718
if(gpgme_initialized){
1719
gpgme_release(mc.ctx);
1722
/* Take down the network interface */
1723
if(take_down_interface){
1724
/* Re-raise priviliges */
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1733
perror("ioctl SIOCGIFFLAGS");
1734
} else if(network.ifr_flags & IFF_UP) {
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1745
/* Lower privileges permanently */
1754
/* Removes the temp directory used by GPGME */
1755
if(tempdir_created){
1757
struct dirent *direntry;
1758
d = opendir(tempdir);
1760
if(errno != ENOENT){
1765
direntry = readdir(d);
1766
if(direntry == NULL){
1769
/* Skip "." and ".." */
1770
if(direntry->d_name[0] == '.'
1771
and (direntry->d_name[1] == '\0'
1772
or (direntry->d_name[1] == '.'
1773
and direntry->d_name[2] == '\0'))){
1776
char *fullname = NULL;
1777
ret = asprintf(&fullname, "%s/%s", tempdir,
1783
ret = remove(fullname);
1785
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1792
ret = rmdir(tempdir);
1793
if(ret == -1 and errno != ENOENT){
1799
sigemptyset(&old_sigterm_action.sa_mask);
1800
old_sigterm_action.sa_handler = SIG_DFL;
1801
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1802
&old_sigterm_action,
1805
perror("sigaction");
1808
ret = raise(signal_received);
1809
} while(ret != 0 and errno == EINTR);
1814
TEMP_FAILURE_RETRY(pause());
1034
fprintf(stderr, "%s exiting\n", argv[0]);
1037
/* Cleanup things */
1039
avahi_s_service_browser_free(sb);
1041
if (mc.server != NULL)
1042
avahi_server_free(mc.server);
1044
if (mc.simple_poll != NULL)
1045
avahi_simple_poll_free(mc.simple_poll);
1046
free(pubkeyfilename);
1047
free(seckeyfilename);
1049
if (gnutls_initalized){
1050
gnutls_certificate_free_credentials(mc.cred);
1051
gnutls_global_deinit ();