80
80
argp_parse(), ARGP_KEY_ARG,
81
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sigaction,
83
sigaction(), SIGTERM, sig_atomic_t,
87
87
#include <sys/klog.h> /* klogctl() */
514
514
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
515
515
__attribute__((unused)) const char *txt){}
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
517
520
/* Called when a Mandos server is found */
518
521
static int start_mandos_communication(const char *ip, uint16_t port,
519
522
AvahiIfIndex if_index,
524
int ret, tcp_sd = -1;
524
527
struct sockaddr_in in;
589
603
if(if_index == AVAHI_IF_UNSPEC){
590
604
fprintf(stderr, "An IPv6 link-local address is incomplete"
591
605
" without a network interface\n");
594
609
/* Set the network interface number as scope */
595
610
to.in6.sin6_scope_id = (uint32_t)if_index;
670
702
fprintf(stderr, "Establishing TLS session with %s\n", ip);
673
709
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
676
716
ret = gnutls_handshake(session);
677
720
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
679
722
if(ret != GNUTLS_E_SUCCESS){
714
766
case GNUTLS_E_REHANDSHAKE:
716
768
ret = gnutls_handshake(session);
717
773
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
719
775
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
738
794
fprintf(stderr, "Closing TLS session\n");
741
801
gnutls_bye(session, GNUTLS_SHUT_RDWR);
743
807
if(buffer_length > 0){
744
808
decrypted_buffer_size = pgp_packet_decrypt(buffer,
747
811
if(decrypted_buffer_size >= 0){
749
813
while(written < (size_t) decrypted_buffer_size){
750
818
ret = (int)fwrite(decrypted_buffer + written, 1,
751
819
(size_t)decrypted_buffer_size - written,
878
sig_atomic_t quit_now = 0;
880
959
/* stop main loop after sigterm has been called */
881
static void handle_sigterm(__attribute__((unused)) int sig){
960
static void handle_sigterm(int sig){
965
signal_received = sig;
886
966
int old_errno = errno;
887
967
if(mc.simple_poll != NULL){
888
968
avahi_simple_poll_quit(mc.simple_poll);
1048
1129
exitcode = EXIT_FAILURE;
1051
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1053
perror("sigaction");
1054
exitcode = EXIT_FAILURE;
1132
/* Need to check if the handler is SIG_IGN before handling:
1133
| [[info:libc:Initial Signal Actions]] |
1134
| [[info:libc:Basic Signal Handling]] |
1136
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1138
perror("sigaction");
1139
return EXIT_FAILURE;
1141
if(old_sigterm_action.sa_handler != SIG_IGN){
1142
ret = sigaction(SIGINT, &sigterm_action, NULL);
1144
perror("sigaction");
1145
exitcode = EXIT_FAILURE;
1149
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1151
perror("sigaction");
1152
return EXIT_FAILURE;
1154
if(old_sigterm_action.sa_handler != SIG_IGN){
1155
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1157
perror("sigaction");
1158
exitcode = EXIT_FAILURE;
1162
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1164
perror("sigaction");
1165
return EXIT_FAILURE;
1167
if(old_sigterm_action.sa_handler != SIG_IGN){
1168
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1170
perror("sigaction");
1171
exitcode = EXIT_FAILURE;
1058
1176
/* If the interface is down, bring it up */
1059
1177
if(interface[0] != '\0'){
1178
if_index = (AvahiIfIndex) if_nametoindex(interface);
1180
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1181
exitcode = EXIT_FAILURE;
1060
1189
#ifdef __linux__
1061
1190
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1062
1191
messages to mess up the prompt */
1100
1229
if((network.ifr_flags & IFF_UP) == 0){
1101
1230
network.ifr_flags |= IFF_UP;
1231
take_down_interface = true;
1102
1232
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1234
take_down_interface = false;
1104
1235
perror("ioctl SIOCSIFFLAGS");
1105
1236
exitcode = EXIT_FAILURE;
1106
1237
#ifdef __linux__
1166
1308
gnutls_initialized = true;
1315
tempdir_created = true;
1169
1316
if(mkdtemp(tempdir) == NULL){
1317
tempdir_created = false;
1170
1318
perror("mkdtemp");
1173
tempdir_created = true;
1175
1326
if(not init_gpgme(pubkey, seckey, tempdir)){
1176
1327
fprintf(stderr, "init_gpgme failed\n");
1180
1331
gpgme_initialized = true;
1183
if(interface[0] != '\0'){
1184
if_index = (AvahiIfIndex) if_nametoindex(interface);
1186
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1187
exitcode = EXIT_FAILURE;
1192
1338
if(connect_to != NULL){
1255
1424
/* Create the Avahi service browser */
1256
1425
sb = avahi_s_service_browser_new(mc.server, if_index,
1257
1426
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1297
1470
gpgme_release(mc.ctx);
1473
/* Take down the network interface */
1474
if(take_down_interface){
1475
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1477
perror("ioctl SIOCGIFFLAGS");
1478
} else if(network.ifr_flags & IFF_UP) {
1479
network.ifr_flags &= ~IFF_UP; /* clear flag */
1480
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1482
perror("ioctl SIOCSIFFLAGS");
1485
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1300
1491
/* Removes the temp directory used by GPGME */
1301
1492
if(tempdir_created){