191
131
return buffer_capacity;
194
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
198
server *new_server = malloc(sizeof(server));
199
if(new_server == NULL){
200
perror_plus("malloc");
203
*new_server = (server){ .ip = strdup(ip),
205
.if_index = if_index,
207
if(new_server->ip == NULL){
208
perror_plus("strdup");
211
/* Special case of first server */
212
if (mc.current_server == NULL){
213
new_server->next = new_server;
214
new_server->prev = new_server;
215
mc.current_server = new_server;
216
/* Place the new server last in the list */
218
new_server->next = mc.current_server;
219
new_server->prev = mc.current_server->prev;
220
new_server->prev->next = new_server;
221
mc.current_server->prev = new_server;
223
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
225
perror_plus("clock_gettime");
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
234
static bool init_gpgme(const char *seckey, const char *pubkey,
235
const char *tempdir){
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
141
const char *homedir){
142
gpgme_data_t dh_crypto, dh_plain;
236
144
gpgme_error_t rc;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
237
148
gpgme_engine_info_t engine_info;
241
* Helper function to insert pub and seckey to the engine keyring.
243
bool import_key(const char *filename){
246
gpgme_data_t pgp_data;
248
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
262
rc = gpgme_op_import(mc.ctx, pgp_data);
263
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
270
ret = (int)TEMP_FAILURE_RETRY(close(fd));
272
perror_plus("close");
274
gpgme_data_release(pgp_data);
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
284
155
gpgme_check_version(NULL);
285
156
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
157
if (rc != GPG_ERR_NO_ERROR){
158
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
289
159
gpgme_strsource(rc), gpgme_strerror(rc));
293
163
/* Set GPGME home directory for the OpenPGP engine only */
294
rc = gpgme_get_engine_info(&engine_info);
295
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
164
rc = gpgme_get_engine_info (&engine_info);
165
if (rc != GPG_ERR_NO_ERROR){
166
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
298
167
gpgme_strsource(rc), gpgme_strerror(rc));
301
170
while(engine_info != NULL){
302
171
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
303
172
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
304
engine_info->file_name, tempdir);
173
engine_info->file_name, homedir);
307
176
engine_info = engine_info->next;
309
178
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
315
/* Create new GPGME "context" */
316
rc = gpgme_new(&(mc.ctx));
317
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
if(not import_key(pubkey) or not import_key(seckey)){
332
* Decrypt OpenPGP data.
333
* Returns -1 on error
335
static ssize_t pgp_packet_decrypt(const char *cryptotext,
338
gpgme_data_t dh_crypto, dh_plain;
341
size_t plaintext_capacity = 0;
342
ssize_t plaintext_length = 0;
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
349
183
/* Create new GPGME data buffer from memory cryptotext */
350
184
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
352
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
186
if (rc != GPG_ERR_NO_ERROR){
187
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
355
188
gpgme_strsource(rc), gpgme_strerror(rc));
359
192
/* Create new empty GPGME data buffer for the plaintext */
360
193
rc = gpgme_data_new(&dh_plain);
361
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
194
if (rc != GPG_ERR_NO_ERROR){
195
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
364
196
gpgme_strsource(rc), gpgme_strerror(rc));
365
197
gpgme_data_release(dh_crypto);
201
/* Create new GPGME "context" */
202
rc = gpgme_new(&ctx);
203
if (rc != GPG_ERR_NO_ERROR){
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
369
210
/* Decrypt data from the cryptotext data buffer to the plaintext
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
213
if (rc != GPG_ERR_NO_ERROR){
214
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
375
215
gpgme_strsource(rc), gpgme_strerror(rc));
376
216
plaintext_length = -1;
378
218
gpgme_decrypt_result_t result;
379
result = gpgme_op_decrypt_result(mc.ctx);
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
219
result = gpgme_op_decrypt_result(ctx);
221
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
223
fprintf(stderr, "Unsupported algorithm: %s\n",
386
224
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
225
fprintf(stderr, "Wrong key usage: %u\n",
389
226
result->wrong_key_usage);
390
227
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
228
fprintf(stderr, "File name: %s\n", result->file_name);
394
230
gpgme_recipient_t recipient;
395
231
recipient = result->recipients;
396
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
406
recipient = recipient->next;
233
while(recipient != NULL){
234
fprintf(stderr, "Public key algorithm: %s\n",
235
gpgme_pubkey_algo_name(recipient->pubkey_algo));
236
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
237
fprintf(stderr, "Secret key available: %s\n",
238
recipient->status == GPG_ERR_NO_SECKEY
240
recipient = recipient->next;
627
438
/* Called when a Mandos server is found */
628
439
static int start_mandos_communication(const char *ip, uint16_t port,
629
440
AvahiIfIndex if_index,
631
int ret, tcp_sd = -1;
634
struct sockaddr_in in;
635
struct sockaddr_in6 in6;
443
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
637
444
char *buffer = NULL;
638
char *decrypted_buffer = NULL;
445
char *decrypted_buffer;
639
446
size_t buffer_length = 0;
640
447
size_t buffer_capacity = 0;
448
ssize_t decrypted_buffer_size;
451
char interface[IF_NAMESIZE];
643
452
gnutls_session_t session;
644
int pf; /* Protocol family */
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
667
ret = init_gnutls_session(&session);
454
ret = init_gnutls_session (mc, &session);
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
678
tcp_sd = socket(pf, SOCK_STREAM, 0);
681
perror_plus("socket");
464
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
471
if(if_indextoname((unsigned int)if_index, interface) == NULL){
472
perror("if_indextoname");
475
fprintf(stderr, "Binding to interface %s\n", interface);
691
478
memset(&to, 0, sizeof(to));
693
to.in6.sin6_family = (sa_family_t)af;
694
ret = inet_pton(af, ip, &to.in6.sin6_addr);
696
to.in.sin_family = (sa_family_t)af;
697
ret = inet_pton(af, ip, &to.in.sin_addr);
701
perror_plus("inet_pton");
479
to.in6.sin6_family = AF_INET6;
480
/* It would be nice to have a way to detect if we were passed an
481
IPv4 address here. Now we assume an IPv6 address. */
482
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
713
to.in6.sin6_port = htons(port); /* Spurious warnings from
715
-Wunreachable-code */
717
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
720
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
727
/* Set the network interface number as scope */
728
to.in6.sin6_scope_id = (uint32_t)if_index;
731
to.in.sin_port = htons(port); /* Spurious warnings from
733
-Wunreachable-code */
488
fprintf(stderr, "Bad address: %s\n", ip);
491
to.in6.sin6_port = htons(port); /* Spurious warning */
493
to.in6.sin6_scope_id = (uint32_t)if_index;
742
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
743
char interface[IF_NAMESIZE];
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
perror_plus("if_indextoname");
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
759
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
762
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
766
perror_plus("inet_ntop");
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
498
char addrstr[INET6_ADDRSTRLEN] = "";
499
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
500
sizeof(addrstr)) == NULL){
768
503
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
504
fprintf(stderr, "Canonical address form: %s\n", addrstr);
781
ret = connect(tcp_sd, &to.in6, sizeof(to));
783
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
786
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
788
perror_plus("connect");
509
ret = connect(tcp_sd, &to.in, sizeof(to));
799
515
const char *out = mandos_protocol_version;
802
518
size_t out_size = strlen(out);
803
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
804
out_size - written));
807
perror_plus("write");
519
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
520
out_size - written));
811
526
written += (size_t)ret;
812
527
if(written < out_size){
815
if(out == mandos_protocol_version){
530
if (out == mandos_protocol_version){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
839
/* Spurious warning from -Wint-to-pointer-cast */
840
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
848
ret = gnutls_handshake(session);
540
fprintf(stderr, "Establishing TLS session with %s\n", ip);
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
546
ret = gnutls_handshake (session);
853
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
855
if(ret != GNUTLS_E_SUCCESS){
549
if (ret != GNUTLS_E_SUCCESS){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
551
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
865
558
/* Read OpenPGP packet that contains the wanted password */
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
561
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
879
buffer_capacity = incbuffer(&buffer, buffer_length,
881
if(buffer_capacity == 0){
883
perror_plus("incbuffer");
893
sret = gnutls_record_recv(session, buffer+buffer_length,
566
buffer_capacity = adjustbuffer(&buffer, buffer_length,
568
if (buffer_capacity == 0){
569
perror("adjustbuffer");
574
ret = gnutls_record_recv(session, buffer+buffer_length,
900
581
case GNUTLS_E_INTERRUPTED:
901
582
case GNUTLS_E_AGAIN:
903
584
case GNUTLS_E_REHANDSHAKE:
905
ret = gnutls_handshake(session);
586
ret = gnutls_handshake (session);
911
587
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
589
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
596
fprintf(stderr, "Unknown error while reading data from"
923
597
" encrypted session with Mandos server\n");
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
599
gnutls_bye (session, GNUTLS_SHUT_RDWR);
929
buffer_length += (size_t) sret;
603
buffer_length += (size_t) ret;
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
944
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
949
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
951
if(buffer_length > 0){
952
ssize_t decrypted_buffer_size;
953
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
955
if(decrypted_buffer_size >= 0){
608
fprintf(stderr, "Closing TLS session\n");
611
gnutls_bye (session, GNUTLS_SHUT_RDWR);
613
if (buffer_length > 0){
614
decrypted_buffer_size = pgp_packet_decrypt(buffer,
618
if (decrypted_buffer_size >= 0){
958
620
while(written < (size_t) decrypted_buffer_size){
964
ret = (int)fwrite(decrypted_buffer + written, 1,
965
(size_t)decrypted_buffer_size - written,
621
ret = (int)fwrite (decrypted_buffer + written, 1,
622
(size_t)decrypted_buffer_size - written,
967
624
if(ret == 0 and ferror(stdout)){
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
626
fprintf(stderr, "Error writing encrypted data: %s\n",
972
627
strerror(errno));
977
632
written += (size_t)ret;
634
free(decrypted_buffer);
983
642
/* Shutdown procedure */
988
free(decrypted_buffer);
991
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
997
perror_plus("close");
999
gnutls_deinit(session);
647
gnutls_deinit (session);
1009
651
static void resolve_callback(AvahiSServiceResolver *r,
1010
652
AvahiIfIndex interface,
1011
AvahiProtocol proto,
653
AVAHI_GCC_UNUSED AvahiProtocol protocol,
1012
654
AvahiResolverEvent event,
1013
655
const char *name,
1014
656
const char *type,
1110
739
case AVAHI_BROWSER_ALL_FOR_NOW:
1111
740
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
742
fprintf(stderr, "No Mandos server found, still searching...\n");
1120
/* Signal handler that stops main loop after SIGTERM */
1121
static void handle_sigterm(int sig){
1126
signal_received = sig;
1127
int old_errno = errno;
1128
/* set main loop to exit */
1129
if(mc.simple_poll != NULL){
1130
avahi_simple_poll_quit(mc.simple_poll);
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1140
perror_plus("socket");
1143
strcpy(ifr->ifr_name, ifname);
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1147
perror_plus("ioctl SIOCGIFFLAGS");
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1156
/* Reject the loopback device */
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1164
/* Accept point-to-point devices only if connect_to is specified */
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1172
/* Otherwise, reject non-broadcast-capable devices */
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
if(ifr->ifr_flags & IFF_NOARP){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1189
/* Accept this device */
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device.
1200
* (This function is passed to scandir(3) as a filter function.)
1202
int good_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1208
if(not get_flags(if_entry->d_name, &ifr)){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1217
if(not good_flags(if_entry->d_name, &ifr)){
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1234
if(not get_flags(if_entry->d_name, &ifr)){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1263
if(not good_flags(if_entry->d_name, &ifr)){
1269
int notdotentries(const struct dirent *direntry){
1270
/* Skip "." and ".." */
1271
if(direntry->d_name[0] == '.'
1272
and (direntry->d_name[1] == '\0'
1273
or (direntry->d_name[1] == '.'
1274
and direntry->d_name[2] == '\0'))){
1280
/* Is this directory entry a runnable program? */
1281
int runnable_hook(const struct dirent *direntry){
1286
if((direntry->d_name)[0] == '\0'){
1291
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1292
"abcdefghijklmnopqrstuvwxyz"
1295
if((direntry->d_name)[sret] != '\0'){
1296
/* Contains non-allowed characters */
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1305
char *fullname = NULL;
1306
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
748
/* Combines file name and path and returns the malloced new
749
string. some sane checks could/should be added */
750
static char *combinepath(const char *first, const char *second){
752
int ret = asprintf(&tmp, "%s/%s", first, second);
1308
perror_plus("asprintf");
1312
ret = stat(fullname, &st);
1315
perror_plus("Could not stat hook");
1319
if(not (S_ISREG(st.st_mode))){
1320
/* Not a regular file */
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
/* Not executable */
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1340
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1342
struct timespec now;
1343
struct timespec waited_time;
1344
intmax_t block_time;
1347
if(mc.current_server == NULL){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1352
ret = avahi_simple_poll_iterate(s, -1);
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1359
/* the current time */
1360
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1362
perror_plus("clock_gettime");
1365
/* Calculating in ms how long time between now and server
1366
who we visted longest time ago. Now - last seen. */
1367
waited_time.tv_sec = (now.tv_sec
1368
- mc.current_server->last_seen.tv_sec);
1369
waited_time.tv_nsec = (now.tv_nsec
1370
- mc.current_server->last_seen.tv_nsec);
1371
/* total time is 10s/10,000ms.
1372
Converting to s from ms by dividing by 1,000,
1373
and ns to ms by dividing by 1,000,000. */
1374
block_time = ((retry_interval
1375
- ((intmax_t)waited_time.tv_sec * 1000))
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1383
if(block_time <= 0){
1384
ret = start_mandos_communication(mc.current_server->ip,
1385
mc.current_server->port,
1386
mc.current_server->if_index,
1387
mc.current_server->af);
1389
avahi_simple_poll_quit(mc.simple_poll);
1392
ret = clock_gettime(CLOCK_MONOTONIC,
1393
&mc.current_server->last_seen);
1395
perror_plus("clock_gettime");
1398
mc.current_server = mc.current_server->next;
1399
block_time = 0; /* Call avahi to find new Mandos
1400
servers, but don't block */
1403
ret = avahi_simple_poll_iterate(s, (int)block_time);
1406
if (ret > 0 or errno != EINTR){
1407
return (ret != 1) ? ret : 0;
1413
bool run_network_hooks(const char *mode, const char *interface,
1415
struct dirent **direntries;
1416
struct dirent *direntry;
1418
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1421
perror_plus("scandir");
1423
int devnull = open("/dev/null", O_RDONLY);
1424
for(int i = 0; i < numhooks; i++){
1425
direntry = direntries[0];
1426
char *fullname = NULL;
1427
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1429
perror_plus("asprintf");
1432
pid_t hook_pid = fork();
1435
dup2(devnull, STDIN_FILENO);
1437
dup2(STDERR_FILENO, STDOUT_FILENO);
1438
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1440
perror_plus("setenv");
1443
ret = setenv("DEVICE", interface, 1);
1445
perror_plus("setenv");
1448
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1450
perror_plus("setenv");
1453
ret = setenv("MODE", mode, 1);
1455
perror_plus("setenv");
1459
ret = asprintf(&delaystring, "%f", delay);
1461
perror_plus("asprintf");
1464
ret = setenv("DELAY", delaystring, 1);
1467
perror_plus("setenv");
1471
ret = execl(fullname, direntry->d_name, mode, NULL);
1472
perror_plus("execl");
1475
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1476
perror_plus("waitpid");
1480
if(WIFEXITED(status)){
1481
if(WEXITSTATUS(status) != 0){
1482
fprintf(stderr, "Mandos plugin mandos-client: "
1483
"Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1489
} else if(WIFSIGNALED(status)){
1490
fprintf(stderr, "Mandos plugin mandos-client: "
1491
"Warning: network hook \"%s\" died by"
1492
" signal %d\n", direntry->d_name,
1497
fprintf(stderr, "Mandos plugin mandos-client: "
1498
"Warning: network hook \"%s\" crashed\n",
1514
760
int main(int argc, char *argv[]){
1515
AvahiSServiceBrowser *sb = NULL;
1520
int exitcode = EXIT_SUCCESS;
1521
const char *interface = "";
1522
struct ifreq network;
1524
bool take_down_interface = false;
1527
char tempdir[] = "/tmp/mandosXXXXXX";
1528
bool tempdir_created = false;
1529
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1530
const char *seckey = PATHDIR "/" SECKEY;
1531
const char *pubkey = PATHDIR "/" PUBKEY;
1533
bool gnutls_initialized = false;
1534
bool gpgme_initialized = false;
1536
double retry_interval = 10; /* 10s between trying a server and
1537
retrying the same server again */
1539
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1540
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1545
/* Lower any group privileges we might have, just to be safe */
1549
perror_plus("setgid");
1552
/* Lower user privileges (temporarily) */
1556
perror_plus("seteuid");
1564
struct argp_option options[] = {
1565
{ .name = "debug", .key = 128,
1566
.doc = "Debug mode", .group = 3 },
1567
{ .name = "connect", .key = 'c',
1568
.arg = "ADDRESS:PORT",
1569
.doc = "Connect directly to a specific Mandos server",
1571
{ .name = "interface", .key = 'i',
1573
.doc = "Network interface that will be used to search for"
1576
{ .name = "seckey", .key = 's',
1578
.doc = "OpenPGP secret key file base name",
1580
{ .name = "pubkey", .key = 'p',
1582
.doc = "OpenPGP public key file base name",
1584
{ .name = "dh-bits", .key = 129,
1586
.doc = "Bit length of the prime number used in the"
1587
" Diffie-Hellman key exchange",
1589
{ .name = "priority", .key = 130,
1591
.doc = "GnuTLS priority string for the TLS handshake",
1593
{ .name = "delay", .key = 131,
1595
.doc = "Maximum delay to wait for interface startup",
1597
{ .name = "retry", .key = 132,
1599
.doc = "Retry interval used when denied by the mandos server",
1601
{ .name = "network-hook-dir", .key = 133,
1603
.doc = "Directory where network hooks are located",
1606
* These reproduce what we would get without ARGP_NO_HELP
1608
{ .name = "help", .key = '?',
1609
.doc = "Give this help list", .group = -1 },
1610
{ .name = "usage", .key = -3,
1611
.doc = "Give a short usage message", .group = -1 },
1612
{ .name = "version", .key = 'V',
1613
.doc = "Print program version", .group = -1 },
1617
error_t parse_opt(int key, char *arg,
1618
struct argp_state *state){
1621
case 128: /* --debug */
1624
case 'c': /* --connect */
1627
case 'i': /* --interface */
1630
case 's': /* --seckey */
1633
case 'p': /* --pubkey */
1636
case 129: /* --dh-bits */
1638
tmpmax = strtoimax(arg, &tmp, 10);
1639
if(errno != 0 or tmp == arg or *tmp != '\0'
1640
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1641
argp_error(state, "Bad number of DH bits");
1643
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1645
case 130: /* --priority */
1648
case 131: /* --delay */
1650
delay = strtof(arg, &tmp);
1651
if(errno != 0 or tmp == arg or *tmp != '\0'){
1652
argp_error(state, "Bad delay");
1654
case 132: /* --retry */
1656
retry_interval = strtod(arg, &tmp);
1657
if(errno != 0 or tmp == arg or *tmp != '\0'
1658
or (retry_interval * 1000) > INT_MAX
1659
or retry_interval < 0){
1660
argp_error(state, "Bad retry interval");
1663
case 133: /* --network-hook-dir */
1667
* These reproduce what we would get without ARGP_NO_HELP
1669
case '?': /* --help */
1670
argp_state_help(state, state->out_stream,
1671
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1672
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1673
case -3: /* --usage */
1674
argp_state_help(state, state->out_stream,
1675
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1676
case 'V': /* --version */
1677
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1678
fprintf(state->out_stream, "%s\n", argp_program_version);
1679
exit(argp_err_exit_status);
1682
return ARGP_ERR_UNKNOWN;
1687
struct argp argp = { .options = options, .parser = parse_opt,
1689
.doc = "Mandos client -- Get and decrypt"
1690
" passwords from a Mandos server" };
1691
ret = argp_parse(&argp, argc, argv,
1692
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1699
perror_plus("argp_parse");
1700
exitcode = EX_OSERR;
1703
exitcode = EX_USAGE;
1709
/* Work around Debian bug #633582:
1710
<http://bugs.debian.org/633582> */
1713
/* Re-raise priviliges */
1717
perror_plus("seteuid");
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1727
perror_plus("fstat");
1729
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1730
ret = fchown(seckey_fd, uid, gid);
1732
perror_plus("fchown");
1736
TEMP_FAILURE_RETRY(close(seckey_fd));
1740
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1741
int pubkey_fd = open(pubkey, O_RDONLY);
1742
if(pubkey_fd == -1){
1743
perror_plus("open");
1745
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1747
perror_plus("fstat");
1749
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1752
perror_plus("fchown");
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1760
/* Lower privileges */
1764
perror_plus("seteuid");
1768
/* Run network hooks */
1770
/* Re-raise priviliges */
1774
perror_plus("seteuid");
1776
if(not run_network_hooks("start", interface, delay)){
1779
/* Lower privileges */
1783
perror_plus("seteuid");
1788
avahi_set_log_function(empty_log);
1791
if(interface[0] == '\0'){
1792
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1797
/* No up interfaces, look for any good interfaces */
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1803
/* Pick the first interface returned */
1804
interface = strdup(direntries[0]->d_name);
1806
fprintf(stderr, "Mandos plugin mandos-client: "
1807
"Using interface \"%s\"\n", interface);
1809
if(interface == NULL){
1810
perror_plus("malloc");
761
AvahiSServiceBrowser *sb = NULL;
764
int exitcode = EXIT_SUCCESS;
765
const char *interface = "eth0";
766
struct ifreq network;
770
char *connect_to = NULL;
771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
776
mandos_context mc = { .simple_poll = NULL, .server = NULL,
777
.dh_bits = 1024, .priority = "SECURE256"};
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',
786
.doc = "Connect directly to a sepcified mandos server",
788
{ .name = "interface", .key = 'i',
790
.doc = "Interface that Avahi will conntect through",
792
{ .name = "keydir", .key = 'd',
794
.doc = "Directory where the openpgp keyring is",
796
{ .name = "seckey", .key = 's',
798
.doc = "Secret openpgp key for gnutls authentication",
800
{ .name = "pubkey", .key = 'p',
802
.doc = "Public openpgp key for gnutls authentication",
804
{ .name = "dh-bits", .key = 129,
806
.doc = "dh-bits to use in gnutls communication",
808
{ .name = "priority", .key = 130,
810
.doc = "GNUTLS priority", .group = 1 },
815
error_t parse_opt (int key, char *arg,
816
struct argp_state *state) {
817
/* Get the INPUT argument from `argp_parse', which we know is
818
a pointer to our plugin list pointer. */
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
854
return ARGP_ERR_UNKNOWN;
859
struct argp argp = { .options = options, .parser = parse_opt,
861
.doc = "Mandos client -- Get and decrypt"
862
" passwords from mandos server" };
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
864
if (ret == ARGP_ERR_UNKNOWN){
865
fprintf(stderr, "Unknown error while parsing arguments\n");
1812
866
exitcode = EXIT_FAILURE;
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Could not find a network interface\n");
1820
exitcode = EXIT_FAILURE;
1825
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1826
from the signal handler */
1827
/* Initialize the pseudo-RNG for Avahi */
1828
srand((unsigned int) time(NULL));
1829
mc.simple_poll = avahi_simple_poll_new();
1830
if(mc.simple_poll == NULL){
1831
fprintf(stderr, "Mandos plugin mandos-client: "
1832
"Avahi: Failed to create simple poll object.\n");
1833
exitcode = EX_UNAVAILABLE;
1837
sigemptyset(&sigterm_action.sa_mask);
1838
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1840
perror_plus("sigaddset");
1841
exitcode = EX_OSERR;
1844
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1846
perror_plus("sigaddset");
1847
exitcode = EX_OSERR;
1850
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1852
perror_plus("sigaddset");
1853
exitcode = EX_OSERR;
1856
/* Need to check if the handler is SIG_IGN before handling:
1857
| [[info:libc:Initial Signal Actions]] |
1858
| [[info:libc:Basic Signal Handling]] |
1860
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1862
perror_plus("sigaction");
1865
if(old_sigterm_action.sa_handler != SIG_IGN){
1866
ret = sigaction(SIGINT, &sigterm_action, NULL);
1868
perror_plus("sigaction");
1869
exitcode = EX_OSERR;
1873
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1875
perror_plus("sigaction");
1878
if(old_sigterm_action.sa_handler != SIG_IGN){
1879
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1881
perror_plus("sigaction");
1882
exitcode = EX_OSERR;
1886
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1888
perror_plus("sigaction");
1891
if(old_sigterm_action.sa_handler != SIG_IGN){
1892
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1894
perror_plus("sigaction");
1895
exitcode = EX_OSERR;
1900
/* If the interface is down, bring it up */
1901
if(strcmp(interface, "none") != 0){
891
gnutls_initalized = true;
894
/* If the interface is down, bring it up */
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
899
exitcode = EXIT_FAILURE;
902
strcpy(network.ifr_name, interface);
903
ret = ioctl(sd, SIOCGIFFLAGS, &network);
905
perror("ioctl SIOCGIFFLAGS");
906
exitcode = EXIT_FAILURE;
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
1902
934
if_index = (AvahiIfIndex) if_nametoindex(interface);
1903
935
if(if_index == 0){
1904
fprintf(stderr, "Mandos plugin mandos-client: "
1905
"No such interface: \"%s\"\n", interface);
1906
exitcode = EX_UNAVAILABLE;
1914
/* Re-raise priviliges */
1918
perror_plus("seteuid");
1922
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1923
messages about the network interface to mess up the prompt */
1924
ret = klogctl(8, NULL, 5);
1925
bool restore_loglevel = true;
1927
restore_loglevel = false;
1928
perror_plus("klogctl");
1930
#endif /* __linux__ */
1932
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1934
perror_plus("socket");
1935
exitcode = EX_OSERR;
1937
if(restore_loglevel){
1938
ret = klogctl(7, NULL, 0);
1940
perror_plus("klogctl");
1943
#endif /* __linux__ */
1944
/* Lower privileges */
1948
perror_plus("seteuid");
1952
strcpy(network.ifr_name, interface);
1953
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1955
perror_plus("ioctl SIOCGIFFLAGS");
1957
if(restore_loglevel){
1958
ret = klogctl(7, NULL, 0);
1960
perror_plus("klogctl");
1963
#endif /* __linux__ */
1964
exitcode = EX_OSERR;
1965
/* Lower privileges */
1969
perror_plus("seteuid");
1973
if((network.ifr_flags & IFF_UP) == 0){
1974
network.ifr_flags |= IFF_UP;
1975
take_down_interface = true;
1976
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1978
take_down_interface = false;
1979
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1980
exitcode = EX_OSERR;
1982
if(restore_loglevel){
1983
ret = klogctl(7, NULL, 0);
1985
perror_plus("klogctl");
1988
#endif /* __linux__ */
1989
/* Lower privileges */
1993
perror_plus("seteuid");
1998
/* Sleep checking until interface is running.
1999
Check every 0.25s, up to total time of delay */
2000
for(int i=0; i < delay * 4; i++){
2001
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2003
perror_plus("ioctl SIOCGIFFLAGS");
2004
} else if(network.ifr_flags & IFF_RUNNING){
2007
struct timespec sleeptime = { .tv_nsec = 250000000 };
2008
ret = nanosleep(&sleeptime, NULL);
2009
if(ret == -1 and errno != EINTR){
2010
perror_plus("nanosleep");
2013
if(not take_down_interface){
2014
/* We won't need the socket anymore */
2015
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2017
perror_plus("close");
2021
if(restore_loglevel){
2022
/* Restores kernel loglevel to default */
2023
ret = klogctl(7, NULL, 0);
2025
perror_plus("klogctl");
2028
#endif /* __linux__ */
2029
/* Lower privileges */
2031
/* Lower privileges */
2034
perror_plus("seteuid");
2042
ret = init_gnutls_global(pubkey, seckey);
2044
fprintf(stderr, "Mandos plugin mandos-client: "
2045
"init_gnutls_global failed\n");
2046
exitcode = EX_UNAVAILABLE;
2049
gnutls_initialized = true;
2056
if(mkdtemp(tempdir) == NULL){
2057
perror_plus("mkdtemp");
2060
tempdir_created = true;
2066
if(not init_gpgme(pubkey, seckey, tempdir)){
2067
fprintf(stderr, "Mandos plugin mandos-client: "
2068
"init_gpgme failed\n");
2069
exitcode = EX_UNAVAILABLE;
2072
gpgme_initialized = true;
2079
if(connect_to != NULL){
2080
/* Connect directly, do not use Zeroconf */
2081
/* (Mainly meant for debugging) */
2082
char *address = strrchr(connect_to, ':');
2083
if(address == NULL){
2084
fprintf(stderr, "Mandos plugin mandos-client: "
2085
"No colon in address\n");
2086
exitcode = EX_USAGE;
2096
tmpmax = strtoimax(address+1, &tmp, 10);
2097
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2098
or tmpmax != (uint16_t)tmpmax){
2099
fprintf(stderr, "Mandos plugin mandos-client: "
2100
"Bad port number\n");
2101
exitcode = EX_USAGE;
2109
port = (uint16_t)tmpmax;
2111
/* Colon in address indicates IPv6 */
2113
if(strchr(connect_to, ':') != NULL){
2115
/* Accept [] around IPv6 address - see RFC 5952 */
2116
if(connect_to[0] == '[' and address[-1] == ']')
2124
address = connect_to;
2130
while(not quit_now){
2131
ret = start_mandos_communication(address, port, if_index, af);
2132
if(quit_now or ret == 0){
2136
fprintf(stderr, "Mandos plugin mandos-client: "
2137
"Retrying in %d seconds\n", (int)retry_interval);
2139
sleep((int)retry_interval);
2143
exitcode = EXIT_SUCCESS;
2154
AvahiServerConfig config;
2155
/* Do not publish any local Zeroconf records */
2156
avahi_server_config_init(&config);
2157
config.publish_hinfo = 0;
2158
config.publish_addresses = 0;
2159
config.publish_workstation = 0;
2160
config.publish_domain = 0;
2162
/* Allocate a new server */
2163
mc.server = avahi_server_new(avahi_simple_poll_get
2164
(mc.simple_poll), &config, NULL,
2167
/* Free the Avahi configuration data */
2168
avahi_server_config_free(&config);
2171
/* Check if creating the Avahi server object succeeded */
2172
if(mc.server == NULL){
2173
fprintf(stderr, "Mandos plugin mandos-client: "
2174
"Failed to create Avahi server: %s\n",
2175
avahi_strerror(error));
2176
exitcode = EX_UNAVAILABLE;
2184
/* Create the Avahi service browser */
2185
sb = avahi_s_service_browser_new(mc.server, if_index,
2186
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2187
NULL, 0, browse_callback, NULL);
2189
fprintf(stderr, "Mandos plugin mandos-client: "
2190
"Failed to create service browser: %s\n",
2191
avahi_strerror(avahi_server_errno(mc.server)));
2192
exitcode = EX_UNAVAILABLE;
2200
/* Run the main loop */
2203
fprintf(stderr, "Mandos plugin mandos-client: "
2204
"Starting Avahi loop search\n");
2207
ret = avahi_loop_with_timeout(mc.simple_poll,
2208
(int)(retry_interval * 1000));
2210
fprintf(stderr, "Mandos plugin mandos-client: "
2211
"avahi_loop_with_timeout exited %s\n",
2212
(ret == 0) ? "successfully" : "with error");
936
fprintf(stderr, "No such interface: \"%s\"\n", interface);
940
if(connect_to != NULL){
941
/* Connect directly, do not use Zeroconf */
942
/* (Mainly meant for debugging) */
943
char *address = strrchr(connect_to, ':');
945
fprintf(stderr, "No colon in address\n");
946
exitcode = EXIT_FAILURE;
950
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
952
perror("Bad port number");
953
exitcode = EXIT_FAILURE;
957
address = connect_to;
958
ret = start_mandos_communication(address, port, if_index, &mc);
960
exitcode = EXIT_FAILURE;
962
exitcode = EXIT_SUCCESS;
968
avahi_set_log_function(empty_log);
971
/* Initialize the pseudo-RNG for Avahi */
972
srand((unsigned int) time(NULL));
974
/* Allocate main Avahi loop object */
975
mc.simple_poll = avahi_simple_poll_new();
976
if (mc.simple_poll == NULL) {
977
fprintf(stderr, "Avahi: Failed to create simple poll"
979
exitcode = EXIT_FAILURE;
984
AvahiServerConfig config;
985
/* Do not publish any local Zeroconf records */
986
avahi_server_config_init(&config);
987
config.publish_hinfo = 0;
988
config.publish_addresses = 0;
989
config.publish_workstation = 0;
990
config.publish_domain = 0;
992
/* Allocate a new server */
993
mc.server = avahi_server_new(avahi_simple_poll_get
994
(mc.simple_poll), &config, NULL,
997
/* Free the Avahi configuration data */
998
avahi_server_config_free(&config);
1001
/* Check if creating the Avahi server object succeeded */
1002
if (mc.server == NULL) {
1003
fprintf(stderr, "Failed to create Avahi server: %s\n",
1004
avahi_strerror(error));
1005
exitcode = EXIT_FAILURE;
1009
/* Create the Avahi service browser */
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
1012
"_mandos._tcp", NULL, 0,
1013
browse_callback, &mc);
1015
fprintf(stderr, "Failed to create service browser: %s\n",
1016
avahi_strerror(avahi_server_errno(mc.server)));
1017
exitcode = EXIT_FAILURE;
1021
/* Run the main loop */
1024
fprintf(stderr, "Starting Avahi loop search\n");
1027
avahi_simple_poll_loop(mc.simple_poll);
2218
fprintf(stderr, "Mandos plugin mandos-client: "
2219
"%s exiting\n", argv[0]);
2222
/* Cleanup things */
2224
avahi_s_service_browser_free(sb);
2226
if(mc.server != NULL)
2227
avahi_server_free(mc.server);
2229
if(mc.simple_poll != NULL)
2230
avahi_simple_poll_free(mc.simple_poll);
2232
if(gnutls_initialized){
2233
gnutls_certificate_free_credentials(mc.cred);
2234
gnutls_global_deinit();
2235
gnutls_dh_params_deinit(mc.dh_params);
2238
if(gpgme_initialized){
2239
gpgme_release(mc.ctx);
2242
/* Cleans up the circular linked list of Mandos servers the client
2244
if(mc.current_server != NULL){
2245
mc.current_server->prev->next = NULL;
2246
while(mc.current_server != NULL){
2247
server *next = mc.current_server->next;
2248
free(mc.current_server);
2249
mc.current_server = next;
2253
/* Re-raise priviliges */
2258
perror_plus("seteuid");
2260
/* Run network hooks */
2261
if(not run_network_hooks("stop", interface, delay)){
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
2267
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2269
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
2271
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2274
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2277
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2279
perror_plus("close");
2283
/* Lower privileges permanently */
2287
perror_plus("setuid");
2290
/* Removes the GPGME temp directory and all files inside */
2291
if(tempdir_created){
2292
struct dirent **direntries = NULL;
2293
struct dirent *direntry = NULL;
2294
int numentries = scandir(tempdir, &direntries, notdotentries,
2296
if (numentries > 0){
2297
for(int i = 0; i < numentries; i++){
2298
direntry = direntries[i];
2299
char *fullname = NULL;
2300
ret = asprintf(&fullname, "%s/%s", tempdir,
2303
perror_plus("asprintf");
2306
ret = remove(fullname);
2308
fprintf(stderr, "Mandos plugin mandos-client: "
2309
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2315
/* need to clean even if 0 because man page doesn't specify */
2317
if (numentries == -1){
2318
perror_plus("scandir");
2320
ret = rmdir(tempdir);
2321
if(ret == -1 and errno != ENOENT){
2322
perror_plus("rmdir");
2327
sigemptyset(&old_sigterm_action.sa_mask);
2328
old_sigterm_action.sa_handler = SIG_DFL;
2329
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2330
&old_sigterm_action,
2333
perror_plus("sigaction");
2336
ret = raise(signal_received);
2337
} while(ret != 0 and errno == EINTR);
2339
perror_plus("raise");
2342
TEMP_FAILURE_RETRY(pause());
1032
fprintf(stderr, "%s exiting\n", argv[0]);
1035
/* Cleanup things */
1037
avahi_s_service_browser_free(sb);
1039
if (mc.server != NULL)
1040
avahi_server_free(mc.server);
1042
if (mc.simple_poll != NULL)
1043
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();