105
204
return buffer_capacity;
207
/* Add server to set of servers to retry periodically */
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
211
server *new_server = malloc(sizeof(server));
212
if(new_server == NULL){
213
perror_plus("malloc");
216
*new_server = (server){ .ip = strdup(ip),
218
.if_index = if_index,
220
if(new_server->ip == NULL){
221
perror_plus("strdup");
224
/* Special case of first server */
225
if (mc.current_server == NULL){
226
new_server->next = new_server;
227
new_server->prev = new_server;
228
mc.current_server = new_server;
229
/* Place the new server last in the list */
231
new_server->next = mc.current_server;
232
new_server->prev = mc.current_server->prev;
233
new_server->prev->next = new_server;
234
mc.current_server->prev = new_server;
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
238
perror_plus("clock_gettime");
109
* Decrypt OpenPGP data using keyrings in HOMEDIR.
110
* Returns -1 on error
112
static ssize_t pgp_packet_decrypt (const char *cryptotext,
115
const char *homedir){
116
gpgme_data_t dh_crypto, dh_plain;
247
static bool init_gpgme(const char *seckey, const char *pubkey,
248
const char *tempdir){
118
249
gpgme_error_t rc;
120
size_t plaintext_capacity = 0;
121
ssize_t plaintext_length = 0;
122
250
gpgme_engine_info_t engine_info;
125
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
* Helper function to insert pub and seckey to the engine keyring.
256
bool import_key(const char *filename){
259
gpgme_data_t pgp_data;
261
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
268
if(rc != GPG_ERR_NO_ERROR){
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
274
rc = gpgme_op_import(mc.ctx, pgp_data);
275
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
281
ret = (int)TEMP_FAILURE_RETRY(close(fd));
283
perror_plus("close");
285
gpgme_data_release(pgp_data);
290
fprintf_plus(stderr, "Initializing GPGME\n");
129
294
gpgme_check_version(NULL);
130
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
131
if (rc != GPG_ERR_NO_ERROR){
132
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
133
gpgme_strsource(rc), gpgme_strerror(rc));
296
if(rc != GPG_ERR_NO_ERROR){
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
137
302
/* Set GPGME home directory for the OpenPGP engine only */
138
rc = gpgme_get_engine_info (&engine_info);
139
if (rc != GPG_ERR_NO_ERROR){
140
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
141
gpgme_strsource(rc), gpgme_strerror(rc));
303
rc = gpgme_get_engine_info(&engine_info);
304
if(rc != GPG_ERR_NO_ERROR){
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
144
309
while(engine_info != NULL){
145
310
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
146
311
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
147
engine_info->file_name, homedir);
312
engine_info->file_name, tempdir);
150
315
engine_info = engine_info->next;
152
317
if(engine_info == NULL){
153
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
323
/* Create new GPGME "context" */
324
rc = gpgme_new(&(mc.ctx));
325
if(rc != GPG_ERR_NO_ERROR){
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
332
if(not import_key(pubkey) or not import_key(seckey)){
340
* Decrypt OpenPGP data.
341
* Returns -1 on error
343
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
gpgme_data_t dh_crypto, dh_plain;
349
size_t plaintext_capacity = 0;
350
ssize_t plaintext_length = 0;
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
157
356
/* Create new GPGME data buffer from memory cryptotext */
158
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
160
if (rc != GPG_ERR_NO_ERROR){
161
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
162
gpgme_strsource(rc), gpgme_strerror(rc));
359
if(rc != GPG_ERR_NO_ERROR){
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
166
365
/* Create new empty GPGME data buffer for the plaintext */
167
366
rc = gpgme_data_new(&dh_plain);
168
if (rc != GPG_ERR_NO_ERROR){
169
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
170
gpgme_strsource(rc), gpgme_strerror(rc));
367
if(rc != GPG_ERR_NO_ERROR){
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
171
371
gpgme_data_release(dh_crypto);
175
/* Create new GPGME "context" */
176
rc = gpgme_new(&ctx);
177
if (rc != GPG_ERR_NO_ERROR){
178
fprintf(stderr, "bad gpgme_new: %s: %s\n",
179
gpgme_strsource(rc), gpgme_strerror(rc));
180
plaintext_length = -1;
184
375
/* Decrypt data from the cryptotext data buffer to the plaintext
186
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
187
if (rc != GPG_ERR_NO_ERROR){
188
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
189
gpgme_strsource(rc), gpgme_strerror(rc));
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
378
if(rc != GPG_ERR_NO_ERROR){
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
190
381
plaintext_length = -1;
195
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
199
gpgme_decrypt_result_t result;
200
result = gpgme_op_decrypt_result(ctx);
202
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
204
fprintf(stderr, "Unsupported algorithm: %s\n",
205
result->unsupported_algorithm);
206
fprintf(stderr, "Wrong key usage: %d\n",
207
result->wrong_key_usage);
208
if(result->file_name != NULL){
209
fprintf(stderr, "File name: %s\n", result->file_name);
211
gpgme_recipient_t recipient;
212
recipient = result->recipients;
383
gpgme_decrypt_result_t result;
384
result = gpgme_op_decrypt_result(mc.ctx);
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
389
result->unsupported_algorithm);
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
391
result->wrong_key_usage);
392
if(result->file_name != NULL){
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
395
gpgme_recipient_t recipient;
396
recipient = result->recipients;
214
397
while(recipient != NULL){
215
fprintf(stderr, "Public key algorithm: %s\n",
216
gpgme_pubkey_algo_name(recipient->pubkey_algo));
217
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
218
fprintf(stderr, "Secret key available: %s\n",
219
recipient->status == GPG_ERR_NO_SECKEY
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
402
fprintf_plus(stderr, "Secret key available: %s\n",
403
recipient->status == GPG_ERR_NO_SECKEY
221
405
recipient = recipient->next;
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
227
416
/* Seek back to the beginning of the GPGME plaintext data buffer */
228
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
229
perror("pgpme_data_seek");
417
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
418
perror_plus("gpgme_data_seek");
230
419
plaintext_length = -1;
231
420
goto decrypt_end;
234
423
*plaintext = NULL;
236
plaintext_capacity = adjustbuffer(plaintext,
237
(size_t)plaintext_length,
239
if (plaintext_capacity == 0){
240
perror("adjustbuffer");
241
plaintext_length = -1;
425
plaintext_capacity = incbuffer(plaintext,
426
(size_t)plaintext_length,
428
if(plaintext_capacity == 0){
429
perror_plus("incbuffer");
430
plaintext_length = -1;
245
434
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
247
436
/* Print the data, if any */
253
perror("gpgme_data_read");
442
perror_plus("gpgme_data_read");
254
443
plaintext_length = -1;
255
444
goto decrypt_end;
257
446
plaintext_length += ret;
261
fprintf(stderr, "Decrypted password is: ");
450
fprintf_plus(stderr, "Decrypted password is: ");
262
451
for(ssize_t i = 0; i < plaintext_length; i++){
263
452
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
401
619
/* Called when a Mandos server is found */
402
620
static int start_mandos_communication(const char *ip, uint16_t port,
403
621
AvahiIfIndex if_index,
406
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
623
int ret, tcp_sd = -1;
626
struct sockaddr_in in;
627
struct sockaddr_in6 in6;
407
629
char *buffer = NULL;
408
char *decrypted_buffer;
630
char *decrypted_buffer = NULL;
409
631
size_t buffer_length = 0;
410
632
size_t buffer_capacity = 0;
411
ssize_t decrypted_buffer_size;
414
char interface[IF_NAMESIZE];
415
635
gnutls_session_t session;
417
ret = init_gnutls_session (mc, &session);
423
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
427
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
434
if(if_indextoname((unsigned int)if_index, interface) == NULL){
435
perror("if_indextoname");
438
fprintf(stderr, "Binding to interface %s\n", interface);
441
memset(&to,0,sizeof(to)); /* Spurious warning */
442
to.in6.sin6_family = AF_INET6;
443
/* It would be nice to have a way to detect if we were passed an
444
IPv4 address here. Now we assume an IPv6 address. */
445
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
636
int pf; /* Protocol family */
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
658
ret = init_gnutls_session(&session);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
671
perror_plus("socket");
681
memset(&to, 0, sizeof(to));
683
to.in6.sin6_family = (sa_family_t)af;
684
ret = inet_pton(af, ip, &to.in6.sin6_addr);
686
to.in.sin_family = (sa_family_t)af;
687
ret = inet_pton(af, ip, &to.in.sin_addr);
691
perror_plus("inet_pton");
451
fprintf(stderr, "Bad address: %s\n", ip);
454
to.in6.sin6_port = htons(port); /* Spurious warning */
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
702
to.in6.sin6_port = htons(port); /* Spurious warnings from
704
-Wunreachable-code */
706
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
if(if_index == AVAHI_IF_UNSPEC){
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
715
/* Set the network interface number as scope */
716
to.in6.sin6_scope_id = (uint32_t)if_index;
719
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wunreachable-code */
456
to.in6.sin6_scope_id = (uint32_t)if_index;
459
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
460
char addrstr[INET6_ADDRSTRLEN] = "";
461
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
462
sizeof(addrstr)) == NULL){
730
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
731
char interface[IF_NAMESIZE];
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
733
perror_plus("if_indextoname");
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
746
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
749
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
753
perror_plus("inet_ntop");
465
755
if(strcmp(addrstr, ip) != 0){
466
fprintf(stderr, "Canonical address form: %s\n", addrstr);
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
471
ret = connect(tcp_sd, &to.in, sizeof(to));
767
ret = connect(tcp_sd, &to.in6, sizeof(to));
769
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
772
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
774
perror_plus("connect");
477
785
const char *out = mandos_protocol_version;
480
788
size_t out_size = strlen(out);
481
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
482
out_size - written));
789
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
790
out_size - written));
793
perror_plus("write");
488
797
written += (size_t)ret;
489
798
if(written < out_size){
492
if (out == mandos_protocol_version){
801
if(out == mandos_protocol_version){
502
fprintf(stderr, "Establishing TLS session with %s\n", ip);
505
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
507
ret = gnutls_handshake (session);
509
if (ret != GNUTLS_E_SUCCESS){
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
824
/* Spurious warning from -Wint-to-pointer-cast */
825
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
833
ret = gnutls_handshake(session);
838
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
840
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
518
849
/* Read OpenPGP packet that contains the wanted password */
521
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
526
buffer_capacity = adjustbuffer(&buffer, buffer_length,
528
if (buffer_capacity == 0){
529
perror("adjustbuffer");
534
ret = gnutls_record_recv(session, buffer+buffer_length,
863
buffer_capacity = incbuffer(&buffer, buffer_length,
865
if(buffer_capacity == 0){
867
perror_plus("incbuffer");
877
sret = gnutls_record_recv(session, buffer+buffer_length,
541
884
case GNUTLS_E_INTERRUPTED:
542
885
case GNUTLS_E_AGAIN:
544
887
case GNUTLS_E_REHANDSHAKE:
545
ret = gnutls_handshake (session);
547
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
889
ret = gnutls_handshake(session);
895
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
554
fprintf(stderr, "Unknown error while reading data from"
555
" encrypted session with Mandos server\n");
557
gnutls_bye (session, GNUTLS_SHUT_RDWR);
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" encrypted session with Mandos server\n");
907
gnutls_bye(session, GNUTLS_SHUT_RDWR);
561
buffer_length += (size_t) ret;
912
buffer_length += (size_t) sret;
566
fprintf(stderr, "Closing TLS session\n");
569
gnutls_bye (session, GNUTLS_SHUT_RDWR);
571
if (buffer_length > 0){
572
decrypted_buffer_size = pgp_packet_decrypt(buffer,
576
if (decrypted_buffer_size >= 0){
917
fprintf_plus(stderr, "Closing TLS session\n");
926
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
931
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
933
if(buffer_length > 0){
934
ssize_t decrypted_buffer_size;
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
937
if(decrypted_buffer_size >= 0){
578
940
while(written < (size_t) decrypted_buffer_size){
579
ret = (int)fwrite (decrypted_buffer + written, 1,
580
(size_t)decrypted_buffer_size - written,
946
ret = (int)fwrite(decrypted_buffer + written, 1,
947
(size_t)decrypted_buffer_size - written,
582
949
if(ret == 0 and ferror(stdout)){
584
fprintf(stderr, "Error writing encrypted data: %s\n",
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
590
958
written += (size_t)ret;
592
free(decrypted_buffer);
598
964
/* Shutdown procedure */
603
gnutls_deinit (session);
604
gnutls_certificate_free_credentials (mc->cred);
605
gnutls_global_deinit ();
969
free(decrypted_buffer);
972
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
978
perror_plus("close");
980
gnutls_deinit(session);
609
990
static void resolve_callback(AvahiSServiceResolver *r,
610
991
AvahiIfIndex interface,
611
AVAHI_GCC_UNUSED AvahiProtocol protocol,
612
993
AvahiResolverEvent event,
613
994
const char *name,
614
995
const char *type,
696
1092
case AVAHI_BROWSER_ALL_FOR_NOW:
697
1093
case AVAHI_BROWSER_CACHE_EXHAUSTED:
699
fprintf(stderr, "No Mandos server found, still searching...\n");
1095
fprintf_plus(stderr, "No Mandos server found, still"
705
/* Combines file name and path and returns the malloced new
706
string. some sane checks could/should be added */
707
static const char *combinepath(const char *first, const char *second){
708
size_t f_len = strlen(first);
709
size_t s_len = strlen(second);
710
char *tmp = malloc(f_len + s_len + 2);
715
memcpy(tmp, first, f_len); /* Spurious warning */
719
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
721
tmp[f_len + 1 + s_len] = '\0';
1102
/* Signal handler that stops main loop after SIGTERM */
1103
static void handle_sigterm(int sig){
1108
signal_received = sig;
1109
int old_errno = errno;
1110
/* set main loop to exit */
1111
if(mc.simple_poll != NULL){
1112
avahi_simple_poll_quit(mc.simple_poll);
1117
bool get_flags(const char *ifname, struct ifreq *ifr){
1120
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1122
perror_plus("socket");
1125
strcpy(ifr->ifr_name, ifname);
1126
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1129
perror_plus("ioctl SIOCGIFFLAGS");
1136
bool good_flags(const char *ifname, const struct ifreq *ifr){
1138
/* Reject the loopback device */
1139
if(ifr->ifr_flags & IFF_LOOPBACK){
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1146
/* Accept point-to-point devices only if connect_to is specified */
1147
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1154
/* Otherwise, reject non-broadcast-capable devices */
1155
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1162
/* Reject non-ARP interfaces (including dummy interfaces) */
1163
if(ifr->ifr_flags & IFF_NOARP){
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1171
/* Accept this device */
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1179
* This function determines if a directory entry in /sys/class/net
1180
* corresponds to an acceptable network device.
1181
* (This function is passed to scandir(3) as a filter function.)
1183
int good_interface(const struct dirent *if_entry){
1184
if(if_entry->d_name[0] == '.'){
1189
if(not get_flags(if_entry->d_name, &ifr)){
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1197
if(not good_flags(if_entry->d_name, &ifr)){
1204
* This function determines if a directory entry in /sys/class/net
1205
* corresponds to an acceptable network device which is up.
1206
* (This function is passed to scandir(3) as a filter function.)
1208
int up_interface(const struct dirent *if_entry){
1209
if(if_entry->d_name[0] == '.'){
1214
if(not get_flags(if_entry->d_name, &ifr)){
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1222
/* Reject down interfaces */
1223
if(not (ifr.ifr_flags & IFF_UP)){
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1231
/* Reject non-running interfaces */
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1240
if(not good_flags(if_entry->d_name, &ifr)){
1246
int notdotentries(const struct dirent *direntry){
1247
/* Skip "." and ".." */
1248
if(direntry->d_name[0] == '.'
1249
and (direntry->d_name[1] == '\0'
1250
or (direntry->d_name[1] == '.'
1251
and direntry->d_name[2] == '\0'))){
1257
/* Is this directory entry a runnable program? */
1258
int runnable_hook(const struct dirent *direntry){
1263
if((direntry->d_name)[0] == '\0'){
1268
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1269
"abcdefghijklmnopqrstuvwxyz"
1272
if((direntry->d_name)[sret] != '\0'){
1273
/* Contains non-allowed characters */
1275
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1281
char *fullname = NULL;
1282
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1284
perror_plus("asprintf");
1288
ret = stat(fullname, &st);
1291
perror_plus("Could not stat hook");
1295
if(not (S_ISREG(st.st_mode))){
1296
/* Not a regular file */
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1303
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1304
/* Not executable */
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1318
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1320
struct timespec now;
1321
struct timespec waited_time;
1322
intmax_t block_time;
1325
if(mc.current_server == NULL){
1327
fprintf_plus(stderr, "Wait until first server is found."
1330
ret = avahi_simple_poll_iterate(s, -1);
1333
fprintf_plus(stderr, "Check current_server if we should run"
1336
/* the current time */
1337
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1339
perror_plus("clock_gettime");
1342
/* Calculating in ms how long time between now and server
1343
who we visted longest time ago. Now - last seen. */
1344
waited_time.tv_sec = (now.tv_sec
1345
- mc.current_server->last_seen.tv_sec);
1346
waited_time.tv_nsec = (now.tv_nsec
1347
- mc.current_server->last_seen.tv_nsec);
1348
/* total time is 10s/10,000ms.
1349
Converting to s from ms by dividing by 1,000,
1350
and ns to ms by dividing by 1,000,000. */
1351
block_time = ((retry_interval
1352
- ((intmax_t)waited_time.tv_sec * 1000))
1353
- ((intmax_t)waited_time.tv_nsec / 1000000));
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
if(block_time <= 0){
1361
ret = start_mandos_communication(mc.current_server->ip,
1362
mc.current_server->port,
1363
mc.current_server->if_index,
1364
mc.current_server->af);
1366
avahi_simple_poll_quit(mc.simple_poll);
1369
ret = clock_gettime(CLOCK_MONOTONIC,
1370
&mc.current_server->last_seen);
1372
perror_plus("clock_gettime");
1375
mc.current_server = mc.current_server->next;
1376
block_time = 0; /* Call avahi to find new Mandos
1377
servers, but don't block */
1380
ret = avahi_simple_poll_iterate(s, (int)block_time);
1383
if (ret > 0 or errno != EINTR){
1384
return (ret != 1) ? ret : 0;
1390
bool run_network_hooks(const char *mode, const char *interface,
1392
struct dirent **direntries;
1393
struct dirent *direntry;
1395
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1398
perror_plus("scandir");
1400
int devnull = open("/dev/null", O_RDONLY);
1401
for(int i = 0; i < numhooks; i++){
1402
direntry = direntries[i];
1403
char *fullname = NULL;
1404
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1406
perror_plus("asprintf");
1410
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1413
pid_t hook_pid = fork();
1416
/* Raise privileges */
1420
perror_plus("seteuid");
1422
/* Raise privileges even more */
1426
perror_plus("setuid");
1432
perror_plus("setgid");
1434
/* Reset supplementary groups */
1436
ret = setgroups(0, NULL);
1438
perror_plus("setgroups");
1440
dup2(devnull, STDIN_FILENO);
1442
dup2(STDERR_FILENO, STDOUT_FILENO);
1443
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1445
perror_plus("setenv");
1448
ret = setenv("DEVICE", interface, 1);
1450
perror_plus("setenv");
1453
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1455
perror_plus("setenv");
1458
ret = setenv("MODE", mode, 1);
1460
perror_plus("setenv");
1464
ret = asprintf(&delaystring, "%f", delay);
1466
perror_plus("asprintf");
1469
ret = setenv("DELAY", delaystring, 1);
1472
perror_plus("setenv");
1476
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1477
perror_plus("execl");
1478
_exit(EXIT_FAILURE);
1482
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1483
perror_plus("waitpid");
1487
if(WIFEXITED(status)){
1488
if(WEXITSTATUS(status) != 0){
1489
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1490
" with status %d\n", direntry->d_name,
1491
WEXITSTATUS(status));
1495
} else if(WIFSIGNALED(status)){
1496
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1497
" signal %d\n", direntry->d_name,
1502
fprintf_plus(stderr, "Warning: network hook \"%s\""
1503
" crashed\n", direntry->d_name);
1510
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
726
1519
int main(int argc, char *argv[]){
727
AvahiSServiceBrowser *sb = NULL;
730
int exitcode = EXIT_SUCCESS;
731
const char *interface = "eth0";
732
struct ifreq network;
736
char *connect_to = NULL;
737
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
738
const char *pubkeyfile = "pubkey.txt";
739
const char *seckeyfile = "seckey.txt";
740
mandos_context mc = { .simple_poll = NULL, .server = NULL,
741
.dh_bits = 1024, .priority = "SECURE256"};
744
struct argp_option options[] = {
745
{ .name = "debug", .key = 128,
746
.doc = "Debug mode", .group = 3 },
747
{ .name = "connect", .key = 'c',
749
.doc = "Connect directly to a sepcified mandos server",
751
{ .name = "interface", .key = 'i',
753
.doc = "Interface that Avahi will conntect through",
755
{ .name = "keydir", .key = 'd',
757
.doc = "Directory where the openpgp keyring is",
759
{ .name = "seckey", .key = 's',
761
.doc = "Secret openpgp key for gnutls authentication",
763
{ .name = "pubkey", .key = 'p',
765
.doc = "Public openpgp key for gnutls authentication",
767
{ .name = "dh-bits", .key = 129,
769
.doc = "dh-bits to use in gnutls communication",
771
{ .name = "priority", .key = 130,
773
.doc = "GNUTLS priority", .group = 1 },
778
error_t parse_opt (int key, char *arg,
779
struct argp_state *state) {
780
/* Get the INPUT argument from `argp_parse', which we know is
781
a pointer to our plugin list pointer. */
803
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
818
return ARGP_ERR_UNKNOWN;
823
struct argp argp = { .options = options, .parser = parse_opt,
825
.doc = "Mandos client -- Get and decrypt"
826
" passwords from mandos server" };
827
argp_parse (&argp, argc, argv, 0, 0, NULL);
830
pubkeyfile = combinepath(keydir, pubkeyfile);
831
if (pubkeyfile == NULL){
832
perror("combinepath");
1520
AvahiSServiceBrowser *sb = NULL;
1525
int exitcode = EXIT_SUCCESS;
1526
const char *interface = "";
1527
struct ifreq network;
1529
bool take_down_interface = false;
1532
char tempdir[] = "/tmp/mandosXXXXXX";
1533
bool tempdir_created = false;
1534
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1535
const char *seckey = PATHDIR "/" SECKEY;
1536
const char *pubkey = PATHDIR "/" PUBKEY;
1538
bool gnutls_initialized = false;
1539
bool gpgme_initialized = false;
1541
double retry_interval = 10; /* 10s between trying a server and
1542
retrying the same server again */
1544
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1545
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1550
/* Lower any group privileges we might have, just to be safe */
1554
perror_plus("setgid");
1557
/* Lower user privileges (temporarily) */
1561
perror_plus("seteuid");
1569
struct argp_option options[] = {
1570
{ .name = "debug", .key = 128,
1571
.doc = "Debug mode", .group = 3 },
1572
{ .name = "connect", .key = 'c',
1573
.arg = "ADDRESS:PORT",
1574
.doc = "Connect directly to a specific Mandos server",
1576
{ .name = "interface", .key = 'i',
1578
.doc = "Network interface that will be used to search for"
1581
{ .name = "seckey", .key = 's',
1583
.doc = "OpenPGP secret key file base name",
1585
{ .name = "pubkey", .key = 'p',
1587
.doc = "OpenPGP public key file base name",
1589
{ .name = "dh-bits", .key = 129,
1591
.doc = "Bit length of the prime number used in the"
1592
" Diffie-Hellman key exchange",
1594
{ .name = "priority", .key = 130,
1596
.doc = "GnuTLS priority string for the TLS handshake",
1598
{ .name = "delay", .key = 131,
1600
.doc = "Maximum delay to wait for interface startup",
1602
{ .name = "retry", .key = 132,
1604
.doc = "Retry interval used when denied by the mandos server",
1606
{ .name = "network-hook-dir", .key = 133,
1608
.doc = "Directory where network hooks are located",
1611
* These reproduce what we would get without ARGP_NO_HELP
1613
{ .name = "help", .key = '?',
1614
.doc = "Give this help list", .group = -1 },
1615
{ .name = "usage", .key = -3,
1616
.doc = "Give a short usage message", .group = -1 },
1617
{ .name = "version", .key = 'V',
1618
.doc = "Print program version", .group = -1 },
1622
error_t parse_opt(int key, char *arg,
1623
struct argp_state *state){
1626
case 128: /* --debug */
1629
case 'c': /* --connect */
1632
case 'i': /* --interface */
1635
case 's': /* --seckey */
1638
case 'p': /* --pubkey */
1641
case 129: /* --dh-bits */
1643
tmpmax = strtoimax(arg, &tmp, 10);
1644
if(errno != 0 or tmp == arg or *tmp != '\0'
1645
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1646
argp_error(state, "Bad number of DH bits");
1648
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1650
case 130: /* --priority */
1653
case 131: /* --delay */
1655
delay = strtof(arg, &tmp);
1656
if(errno != 0 or tmp == arg or *tmp != '\0'){
1657
argp_error(state, "Bad delay");
1659
case 132: /* --retry */
1661
retry_interval = strtod(arg, &tmp);
1662
if(errno != 0 or tmp == arg or *tmp != '\0'
1663
or (retry_interval * 1000) > INT_MAX
1664
or retry_interval < 0){
1665
argp_error(state, "Bad retry interval");
1668
case 133: /* --network-hook-dir */
1672
* These reproduce what we would get without ARGP_NO_HELP
1674
case '?': /* --help */
1675
argp_state_help(state, state->out_stream,
1676
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1677
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1678
case -3: /* --usage */
1679
argp_state_help(state, state->out_stream,
1680
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1681
case 'V': /* --version */
1682
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1683
exit(argp_err_exit_status);
1686
return ARGP_ERR_UNKNOWN;
1691
struct argp argp = { .options = options, .parser = parse_opt,
1693
.doc = "Mandos client -- Get and decrypt"
1694
" passwords from a Mandos server" };
1695
ret = argp_parse(&argp, argc, argv,
1696
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1703
perror_plus("argp_parse");
1704
exitcode = EX_OSERR;
1707
exitcode = EX_USAGE;
1713
/* Work around Debian bug #633582:
1714
<http://bugs.debian.org/633582> */
1716
/* Re-raise priviliges */
1720
perror_plus("seteuid");
1724
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1725
int seckey_fd = open(seckey, O_RDONLY);
1726
if(seckey_fd == -1){
1727
perror_plus("open");
1729
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1731
perror_plus("fstat");
1733
if(S_ISREG(st.st_mode)
1734
and st.st_uid == 0 and st.st_gid == 0){
1735
ret = fchown(seckey_fd, uid, gid);
1737
perror_plus("fchown");
1741
TEMP_FAILURE_RETRY(close(seckey_fd));
1745
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1746
int pubkey_fd = open(pubkey, O_RDONLY);
1747
if(pubkey_fd == -1){
1748
perror_plus("open");
1750
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1752
perror_plus("fstat");
1754
if(S_ISREG(st.st_mode)
1755
and st.st_uid == 0 and st.st_gid == 0){
1756
ret = fchown(pubkey_fd, uid, gid);
1758
perror_plus("fchown");
1762
TEMP_FAILURE_RETRY(close(pubkey_fd));
1766
/* Lower privileges */
1770
perror_plus("seteuid");
1775
/* Run network hooks */
1776
if(not run_network_hooks("start", interface, delay)){
1781
avahi_set_log_function(empty_log);
1784
if(interface[0] == '\0'){
1785
struct dirent **direntries;
1786
/* First look for interfaces that are up */
1787
ret = scandir(sys_class_net, &direntries, up_interface,
1790
/* No up interfaces, look for any good interfaces */
1792
ret = scandir(sys_class_net, &direntries, good_interface,
1796
/* Pick the first interface returned */
1797
interface = strdup(direntries[0]->d_name);
1799
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1801
if(interface == NULL){
1802
perror_plus("malloc");
1804
exitcode = EXIT_FAILURE;
1810
fprintf_plus(stderr, "Could not find a network interface\n");
833
1811
exitcode = EXIT_FAILURE;
837
seckeyfile = combinepath(keydir, seckeyfile);
838
if (seckeyfile == NULL){
839
perror("combinepath");
843
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
845
fprintf(stderr, "init_gnutls_global\n");
1816
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1817
from the signal handler */
1818
/* Initialize the pseudo-RNG for Avahi */
1819
srand((unsigned int) time(NULL));
1820
mc.simple_poll = avahi_simple_poll_new();
1821
if(mc.simple_poll == NULL){
1822
fprintf_plus(stderr,
1823
"Avahi: Failed to create simple poll object.\n");
1824
exitcode = EX_UNAVAILABLE;
1828
sigemptyset(&sigterm_action.sa_mask);
1829
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1831
perror_plus("sigaddset");
1832
exitcode = EX_OSERR;
1835
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1837
perror_plus("sigaddset");
1838
exitcode = EX_OSERR;
1841
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1843
perror_plus("sigaddset");
1844
exitcode = EX_OSERR;
1847
/* Need to check if the handler is SIG_IGN before handling:
1848
| [[info:libc:Initial Signal Actions]] |
1849
| [[info:libc:Basic Signal Handling]] |
1851
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1853
perror_plus("sigaction");
1856
if(old_sigterm_action.sa_handler != SIG_IGN){
1857
ret = sigaction(SIGINT, &sigterm_action, NULL);
1859
perror_plus("sigaction");
1860
exitcode = EX_OSERR;
1864
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1866
perror_plus("sigaction");
1869
if(old_sigterm_action.sa_handler != SIG_IGN){
1870
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1872
perror_plus("sigaction");
1873
exitcode = EX_OSERR;
1877
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1879
perror_plus("sigaction");
1882
if(old_sigterm_action.sa_handler != SIG_IGN){
1883
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1885
perror_plus("sigaction");
1886
exitcode = EX_OSERR;
1891
/* If the interface is down, bring it up */
1892
if(strcmp(interface, "none") != 0){
862
1893
if_index = (AvahiIfIndex) if_nametoindex(interface);
863
1894
if(if_index == 0){
864
fprintf(stderr, "No such interface: \"%s\"\n", interface);
868
if(connect_to != NULL){
869
/* Connect directly, do not use Zeroconf */
870
/* (Mainly meant for debugging) */
871
char *address = strrchr(connect_to, ':');
873
fprintf(stderr, "No colon in address\n");
874
exitcode = EXIT_FAILURE;
878
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
880
perror("Bad port number");
881
exitcode = EXIT_FAILURE;
885
address = connect_to;
886
ret = start_mandos_communication(address, port, if_index, &mc);
888
exitcode = EXIT_FAILURE;
890
exitcode = EXIT_SUCCESS;
895
/* If the interface is down, bring it up */
897
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
900
exitcode = EXIT_FAILURE;
903
strcpy(network.ifr_name, interface); /* Spurious warning */
904
ret = ioctl(sd, SIOCGIFFLAGS, &network);
906
perror("ioctl SIOCGIFFLAGS");
907
exitcode = EXIT_FAILURE;
910
if((network.ifr_flags & IFF_UP) == 0){
911
network.ifr_flags |= IFF_UP;
1895
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1896
exitcode = EX_UNAVAILABLE;
1904
/* Re-raise priviliges */
1908
perror_plus("seteuid");
1912
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1913
messages about the network interface to mess up the prompt */
1914
ret = klogctl(8, NULL, 5);
1915
bool restore_loglevel = true;
1917
restore_loglevel = false;
1918
perror_plus("klogctl");
1920
#endif /* __linux__ */
1922
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1924
perror_plus("socket");
1925
exitcode = EX_OSERR;
1927
if(restore_loglevel){
1928
ret = klogctl(7, NULL, 0);
1930
perror_plus("klogctl");
1933
#endif /* __linux__ */
1934
/* Lower privileges */
1938
perror_plus("seteuid");
1942
strcpy(network.ifr_name, interface);
1943
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1945
perror_plus("ioctl SIOCGIFFLAGS");
1947
if(restore_loglevel){
1948
ret = klogctl(7, NULL, 0);
1950
perror_plus("klogctl");
1953
#endif /* __linux__ */
1954
exitcode = EX_OSERR;
1955
/* Lower privileges */
1959
perror_plus("seteuid");
1963
if((network.ifr_flags & IFF_UP) == 0){
1964
network.ifr_flags |= IFF_UP;
1965
take_down_interface = true;
1966
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1968
take_down_interface = false;
1969
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1970
exitcode = EX_OSERR;
1972
if(restore_loglevel){
1973
ret = klogctl(7, NULL, 0);
1975
perror_plus("klogctl");
1978
#endif /* __linux__ */
1979
/* Lower privileges */
1983
perror_plus("seteuid");
1988
/* Sleep checking until interface is running.
1989
Check every 0.25s, up to total time of delay */
1990
for(int i=0; i < delay * 4; i++){
1991
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1993
perror_plus("ioctl SIOCGIFFLAGS");
1994
} else if(network.ifr_flags & IFF_RUNNING){
1997
struct timespec sleeptime = { .tv_nsec = 250000000 };
1998
ret = nanosleep(&sleeptime, NULL);
1999
if(ret == -1 and errno != EINTR){
2000
perror_plus("nanosleep");
2003
if(not take_down_interface){
2004
/* We won't need the socket anymore */
2005
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2007
perror_plus("close");
2011
if(restore_loglevel){
2012
/* Restores kernel loglevel to default */
2013
ret = klogctl(7, NULL, 0);
2015
perror_plus("klogctl");
2018
#endif /* __linux__ */
2019
/* Lower privileges */
2021
/* Lower privileges */
2024
perror_plus("seteuid");
2032
ret = init_gnutls_global(pubkey, seckey);
2034
fprintf_plus(stderr, "init_gnutls_global failed\n");
2035
exitcode = EX_UNAVAILABLE;
2038
gnutls_initialized = true;
2045
if(mkdtemp(tempdir) == NULL){
2046
perror_plus("mkdtemp");
2049
tempdir_created = true;
2055
if(not init_gpgme(pubkey, seckey, tempdir)){
2056
fprintf_plus(stderr, "init_gpgme failed\n");
2057
exitcode = EX_UNAVAILABLE;
2060
gpgme_initialized = true;
2067
if(connect_to != NULL){
2068
/* Connect directly, do not use Zeroconf */
2069
/* (Mainly meant for debugging) */
2070
char *address = strrchr(connect_to, ':');
2071
if(address == NULL){
2072
fprintf_plus(stderr, "No colon in address\n");
2073
exitcode = EX_USAGE;
2083
tmpmax = strtoimax(address+1, &tmp, 10);
2084
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2085
or tmpmax != (uint16_t)tmpmax){
2086
fprintf_plus(stderr, "Bad port number\n");
2087
exitcode = EX_USAGE;
2095
port = (uint16_t)tmpmax;
2097
/* Colon in address indicates IPv6 */
2099
if(strchr(connect_to, ':') != NULL){
2101
/* Accept [] around IPv6 address - see RFC 5952 */
2102
if(connect_to[0] == '[' and address[-1] == ']')
2110
address = connect_to;
2116
while(not quit_now){
2117
ret = start_mandos_communication(address, port, if_index, af);
2118
if(quit_now or ret == 0){
2122
fprintf_plus(stderr, "Retrying in %d seconds\n",
2123
(int)retry_interval);
2125
sleep((int)retry_interval);
2129
exitcode = EXIT_SUCCESS;
2140
AvahiServerConfig config;
2141
/* Do not publish any local Zeroconf records */
2142
avahi_server_config_init(&config);
2143
config.publish_hinfo = 0;
2144
config.publish_addresses = 0;
2145
config.publish_workstation = 0;
2146
config.publish_domain = 0;
2148
/* Allocate a new server */
2149
mc.server = avahi_server_new(avahi_simple_poll_get
2150
(mc.simple_poll), &config, NULL,
2153
/* Free the Avahi configuration data */
2154
avahi_server_config_free(&config);
2157
/* Check if creating the Avahi server object succeeded */
2158
if(mc.server == NULL){
2159
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2160
avahi_strerror(error));
2161
exitcode = EX_UNAVAILABLE;
2169
/* Create the Avahi service browser */
2170
sb = avahi_s_service_browser_new(mc.server, if_index,
2171
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2172
NULL, 0, browse_callback, NULL);
2174
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2175
avahi_strerror(avahi_server_errno(mc.server)));
2176
exitcode = EX_UNAVAILABLE;
2184
/* Run the main loop */
2187
fprintf_plus(stderr, "Starting Avahi loop search\n");
2190
ret = avahi_loop_with_timeout(mc.simple_poll,
2191
(int)(retry_interval * 1000));
2193
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2194
(ret == 0) ? "successfully" : "with error");
2200
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2203
/* Cleanup things */
2205
avahi_s_service_browser_free(sb);
2207
if(mc.server != NULL)
2208
avahi_server_free(mc.server);
2210
if(mc.simple_poll != NULL)
2211
avahi_simple_poll_free(mc.simple_poll);
2213
if(gnutls_initialized){
2214
gnutls_certificate_free_credentials(mc.cred);
2215
gnutls_global_deinit();
2216
gnutls_dh_params_deinit(mc.dh_params);
2219
if(gpgme_initialized){
2220
gpgme_release(mc.ctx);
2223
/* Cleans up the circular linked list of Mandos servers the client
2225
if(mc.current_server != NULL){
2226
mc.current_server->prev->next = NULL;
2227
while(mc.current_server != NULL){
2228
server *next = mc.current_server->next;
2229
free(mc.current_server);
2230
mc.current_server = next;
2234
/* Run network hooks */
2235
run_network_hooks("stop", interface, delay);
2237
/* Re-raise priviliges */
2242
perror_plus("seteuid");
2245
/* Take down the network interface */
2246
if(take_down_interface and geteuid() == 0){
2247
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2249
perror_plus("ioctl SIOCGIFFLAGS");
2250
} else if(network.ifr_flags & IFF_UP){
2251
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
912
2252
ret = ioctl(sd, SIOCSIFFLAGS, &network);
914
perror("ioctl SIOCSIFFLAGS");
915
exitcode = EXIT_FAILURE;
923
avahi_set_log_function(empty_log);
926
/* Initialize the pseudo-RNG for Avahi */
927
srand((unsigned int) time(NULL));
929
/* Allocate main Avahi loop object */
930
mc.simple_poll = avahi_simple_poll_new();
931
if (mc.simple_poll == NULL) {
932
fprintf(stderr, "Avahi: Failed to create simple poll"
934
exitcode = EXIT_FAILURE;
939
AvahiServerConfig config;
940
/* Do not publish any local Zeroconf records */
941
avahi_server_config_init(&config);
942
config.publish_hinfo = 0;
943
config.publish_addresses = 0;
944
config.publish_workstation = 0;
945
config.publish_domain = 0;
947
/* Allocate a new server */
948
mc.server = avahi_server_new(avahi_simple_poll_get
949
(mc.simple_poll), &config, NULL,
952
/* Free the Avahi configuration data */
953
avahi_server_config_free(&config);
956
/* Check if creating the Avahi server object succeeded */
957
if (mc.server == NULL) {
958
fprintf(stderr, "Failed to create Avahi server: %s\n",
959
avahi_strerror(error));
960
exitcode = EXIT_FAILURE;
964
/* Create the Avahi service browser */
965
sb = avahi_s_service_browser_new(mc.server, if_index,
967
"_mandos._tcp", NULL, 0,
968
browse_callback, &mc);
970
fprintf(stderr, "Failed to create service browser: %s\n",
971
avahi_strerror(avahi_server_errno(mc.server)));
972
exitcode = EXIT_FAILURE;
976
/* Run the main loop */
979
fprintf(stderr, "Starting Avahi loop search\n");
982
avahi_simple_poll_loop(mc.simple_poll);
987
fprintf(stderr, "%s exiting\n", argv[0]);
992
avahi_s_service_browser_free(sb);
994
if (mc.server != NULL)
995
avahi_server_free(mc.server);
997
if (mc.simple_poll != NULL)
998
avahi_simple_poll_free(mc.simple_poll);
2254
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2257
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2259
perror_plus("close");
2263
/* Lower privileges permanently */
2267
perror_plus("setuid");
2270
/* Removes the GPGME temp directory and all files inside */
2271
if(tempdir_created){
2272
struct dirent **direntries = NULL;
2273
struct dirent *direntry = NULL;
2274
int numentries = scandir(tempdir, &direntries, notdotentries,
2276
if (numentries > 0){
2277
for(int i = 0; i < numentries; i++){
2278
direntry = direntries[i];
2279
char *fullname = NULL;
2280
ret = asprintf(&fullname, "%s/%s", tempdir,
2283
perror_plus("asprintf");
2286
ret = remove(fullname);
2288
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2295
/* need to clean even if 0 because man page doesn't specify */
2297
if (numentries == -1){
2298
perror_plus("scandir");
2300
ret = rmdir(tempdir);
2301
if(ret == -1 and errno != ENOENT){
2302
perror_plus("rmdir");
2307
sigemptyset(&old_sigterm_action.sa_mask);
2308
old_sigterm_action.sa_handler = SIG_DFL;
2309
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2310
&old_sigterm_action,
2313
perror_plus("sigaction");
2316
ret = raise(signal_received);
2317
} while(ret != 0 and errno == EINTR);
2319
perror_plus("raise");
2322
TEMP_FAILURE_RETRY(pause());