133
120
#define PATHDIR "/conf/conf.d/mandos"
134
121
#define SECKEY "seckey.txt"
135
122
#define PUBKEY "pubkey.txt"
136
#define HOOKDIR "/lib/mandos/network-hooks.d"
138
124
bool debug = false;
139
125
static const char mandos_protocol_version[] = "1";
140
126
const char *argp_program_version = "mandos-client " VERSION;
141
const char *argp_program_bug_address = "<mandos@recompile.se>";
142
static const char sys_class_net[] = "/sys/class/net";
143
char *connect_to = NULL;
144
const char *hookdir = HOOKDIR;
149
/* Doubly linked list that need to be circularly linked when used */
150
typedef struct server{
153
AvahiIfIndex if_index;
155
struct timespec last_seen;
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
160
129
/* Used for passing in values through the Avahi callback functions */
131
AvahiSimplePoll *simple_poll;
162
132
AvahiServer *server;
163
133
gnutls_certificate_credentials_t cred;
164
134
unsigned int dh_bits;
165
135
gnutls_dh_params_t dh_params;
166
136
const char *priority;
168
server *current_server;
170
size_t interfaces_size;
171
138
} mandos_context;
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
176
sig_atomic_t quit_now = 0;
177
int signal_received = 0;
179
/* Function to use when printing errors */
180
void perror_plus(const char *print_text){
182
fprintf(stderr, "Mandos plugin %s: ",
183
program_invocation_short_name);
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
189
int fprintf_plus(FILE *stream, const char *format, ...){
191
va_start (ap, format);
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
199
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
200
147
* bytes. "buffer_capacity" is how much is currently allocated,
201
148
* "buffer_length" is how much is already used.
203
__attribute__((nonnull, warn_unused_result))
204
150
size_t incbuffer(char **buffer, size_t buffer_length,
205
size_t buffer_capacity){
151
size_t buffer_capacity){
206
152
if(buffer_length + BUFFER_SIZE > buffer_capacity){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
209
int old_errno = errno;
153
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
216
157
buffer_capacity += BUFFER_SIZE;
218
159
return buffer_capacity;
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
int af, server **current_server){
226
server *new_server = malloc(sizeof(server));
227
if(new_server == NULL){
228
perror_plus("malloc");
231
*new_server = (server){ .ip = strdup(ip),
233
.if_index = if_index,
235
if(new_server->ip == NULL){
236
perror_plus("strdup");
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
242
perror_plus("clock_gettime");
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
247
free((char *)(new_server->ip));
249
#pragma GCC diagnostic pop
254
/* Special case of first server */
255
if(*current_server == NULL){
256
new_server->next = new_server;
257
new_server->prev = new_server;
258
*current_server = new_server;
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
263
new_server->prev->next = new_server;
264
(*current_server)->prev = new_server;
270
163
* Initialize GPGME.
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
165
static bool init_gpgme(const char *seckey,
166
const char *pubkey, const char *tempdir){
277
167
gpgme_error_t rc;
278
168
gpgme_engine_info_t engine_info;
281
172
* Helper function to insert pub and seckey to the engine keyring.
283
bool import_key(const char * const filename){
174
bool import_key(const char *filename){
286
177
gpgme_data_t pgp_data;
288
179
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
294
185
rc = gpgme_data_new_from_fd(&pgp_data, fd);
295
186
if(rc != GPG_ERR_NO_ERROR){
296
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
297
gpgme_strsource(rc), gpgme_strerror(rc));
187
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
188
gpgme_strsource(rc), gpgme_strerror(rc));
301
rc = gpgme_op_import(mc->ctx, pgp_data);
192
rc = gpgme_op_import(mc.ctx, pgp_data);
302
193
if(rc != GPG_ERR_NO_ERROR){
303
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
308
199
ret = (int)TEMP_FAILURE_RETRY(close(fd));
310
perror_plus("close");
312
203
gpgme_data_release(pgp_data);
317
fprintf_plus(stderr, "Initializing GPGME\n");
208
fprintf(stderr, "Initializing GPGME\n");
321
212
gpgme_check_version(NULL);
322
213
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
323
214
if(rc != GPG_ERR_NO_ERROR){
324
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
325
gpgme_strsource(rc), gpgme_strerror(rc));
215
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
216
gpgme_strsource(rc), gpgme_strerror(rc));
329
/* Set GPGME home directory for the OpenPGP engine only */
220
/* Set GPGME home directory for the OpenPGP engine only */
330
221
rc = gpgme_get_engine_info(&engine_info);
331
222
if(rc != GPG_ERR_NO_ERROR){
332
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
333
gpgme_strsource(rc), gpgme_strerror(rc));
223
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
224
gpgme_strsource(rc), gpgme_strerror(rc));
336
227
while(engine_info != NULL){
379
266
ssize_t plaintext_length = 0;
382
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
269
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
385
272
/* Create new GPGME data buffer from memory cryptotext */
386
273
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
388
275
if(rc != GPG_ERR_NO_ERROR){
389
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
390
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
394
281
/* Create new empty GPGME data buffer for the plaintext */
395
282
rc = gpgme_data_new(&dh_plain);
396
283
if(rc != GPG_ERR_NO_ERROR){
397
fprintf_plus(stderr, "Mandos plugin mandos-client: "
398
"bad gpgme_data_new: %s: %s\n",
399
gpgme_strsource(rc), gpgme_strerror(rc));
284
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
285
gpgme_strsource(rc), gpgme_strerror(rc));
400
286
gpgme_data_release(dh_crypto);
404
290
/* Decrypt data from the cryptotext data buffer to the plaintext
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
407
293
if(rc != GPG_ERR_NO_ERROR){
408
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
409
gpgme_strsource(rc), gpgme_strerror(rc));
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
410
296
plaintext_length = -1;
412
298
gpgme_decrypt_result_t result;
413
result = gpgme_op_decrypt_result(mc->ctx);
299
result = gpgme_op_decrypt_result(mc.ctx);
414
300
if(result == NULL){
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
417
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
419
fprintf_plus(stderr, "Wrong key usage: %u\n",
420
result->wrong_key_usage);
303
fprintf(stderr, "Unsupported algorithm: %s\n",
304
result->unsupported_algorithm);
305
fprintf(stderr, "Wrong key usage: %u\n",
306
result->wrong_key_usage);
421
307
if(result->file_name != NULL){
422
fprintf_plus(stderr, "File name: %s\n", result->file_name);
308
fprintf(stderr, "File name: %s\n", result->file_name);
424
310
gpgme_recipient_t recipient;
425
311
recipient = result->recipients;
426
312
while(recipient != NULL){
427
fprintf_plus(stderr, "Public key algorithm: %s\n",
428
gpgme_pubkey_algo_name
429
(recipient->pubkey_algo));
430
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
431
fprintf_plus(stderr, "Secret key available: %s\n",
432
recipient->status == GPG_ERR_NO_SECKEY
313
fprintf(stderr, "Public key algorithm: %s\n",
314
gpgme_pubkey_algo_name(recipient->pubkey_algo));
315
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
316
fprintf(stderr, "Secret key available: %s\n",
317
recipient->status == GPG_ERR_NO_SECKEY
434
319
recipient = recipient->next;
542
418
/* OpenPGP credentials */
543
ret = gnutls_certificate_allocate_credentials(&mc->cred);
419
gnutls_certificate_allocate_credentials(&mc.cred);
544
420
if(ret != GNUTLS_E_SUCCESS){
545
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
safer_gnutls_strerror(ret));
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
safer_gnutls_strerror(ret));
547
426
gnutls_global_deinit();
552
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
553
" secret key %s as GnuTLS credentials\n",
431
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
432
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
558
436
ret = gnutls_certificate_set_openpgp_key_file
559
(mc->cred, pubkeyfilename, seckeyfilename,
437
(mc.cred, pubkeyfilename, seckeyfilename,
560
438
GNUTLS_OPENPGP_FMT_BASE64);
561
439
if(ret != GNUTLS_E_SUCCESS){
563
"Error[%d] while reading the OpenPGP key pair ('%s',"
564
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
565
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
566
safer_gnutls_strerror(ret));
441
"Error[%d] while reading the OpenPGP key pair ('%s',"
442
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
443
fprintf(stderr, "The GnuTLS error is: %s\n",
444
safer_gnutls_strerror(ret));
570
448
/* GnuTLS server initialization */
571
ret = gnutls_dh_params_init(&mc->dh_params);
449
ret = gnutls_dh_params_init(&mc.dh_params);
572
450
if(ret != GNUTLS_E_SUCCESS){
573
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
574
" initialization: %s\n",
575
safer_gnutls_strerror(ret));
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
" %s\n", safer_gnutls_strerror(ret));
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
586
buffer_capacity = incbuffer((char **)&buffer.data,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
590
perror_plus("incbuffer");
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
601
/* check bytes_read for failure */
608
buffer.size += (unsigned int)bytes_read;
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
627
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
629
safer_gnutls_strerror(ret));
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
651
fprintf_plus(stderr, "Falling back to security parameter"
653
safe_string(gnutls_sec_param_get_name
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
664
safe_string(gnutls_sec_param_get_name
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
672
safer_gnutls_strerror(ret));
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
679
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
680
456
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
safer_gnutls_strerror(ret));
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
692
gnutls_certificate_free_credentials(mc->cred);
468
gnutls_certificate_free_credentials(mc.cred);
693
469
gnutls_global_deinit();
694
gnutls_dh_params_deinit(mc->dh_params);
470
gnutls_dh_params_deinit(mc.dh_params);
698
__attribute__((nonnull, warn_unused_result))
699
static int init_gnutls_session(gnutls_session_t *session,
474
static int init_gnutls_session(gnutls_session_t *session){
702
476
/* GnuTLS session creation */
704
ret = gnutls_init(session, GNUTLS_SERVER);
708
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_init(session, GNUTLS_SERVER);
709
478
if(ret != GNUTLS_E_SUCCESS){
711
"Error in GnuTLS session initialization: %s\n",
712
safer_gnutls_strerror(ret));
479
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
480
safer_gnutls_strerror(ret));
718
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
720
gnutls_deinit(*session);
723
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
724
486
if(ret != GNUTLS_E_SUCCESS){
725
fprintf_plus(stderr, "Syntax error at: %s\n", err);
726
fprintf_plus(stderr, "GnuTLS error: %s\n",
727
safer_gnutls_strerror(ret));
487
fprintf(stderr, "Syntax error at: %s\n", err);
488
fprintf(stderr, "GnuTLS error: %s\n",
489
safer_gnutls_strerror(ret));
728
490
gnutls_deinit(*session);
734
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
737
gnutls_deinit(*session);
740
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
741
497
if(ret != GNUTLS_E_SUCCESS){
742
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
743
safer_gnutls_strerror(ret));
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
safer_gnutls_strerror(ret));
744
500
gnutls_deinit(*session);
748
504
/* ignore client certificate if any. */
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
505
gnutls_certificate_server_set_request(*session,
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
792
fprintf_plus(stderr, "Bad address family: %d\n", af);
551
fprintf(stderr, "Bad address family: %d\n", af);
797
/* If the interface is specified and we have a list of interfaces */
798
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
799
/* Check if the interface is one of the interfaces we are using */
802
char *interface = NULL;
803
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
805
if(if_nametoindex(interface) == (unsigned int)if_index){
812
/* This interface does not match any in the list, so we don't
813
connect to the server */
815
char interface[IF_NAMESIZE];
816
if(if_indextoname((unsigned int)if_index, interface) == NULL){
817
perror_plus("if_indextoname");
819
fprintf_plus(stderr, "Skipping server on non-used interface"
821
if_indextoname((unsigned int)if_index,
829
ret = init_gnutls_session(&session, mc);
555
ret = init_gnutls_session(&session);
835
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
836
PRIuMAX "\n", ip, (uintmax_t)port);
561
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
839
565
tcp_sd = socket(pf, SOCK_STREAM, 0);
842
perror_plus("socket");
852
576
memset(&to, 0, sizeof(to));
853
577
if(af == AF_INET6){
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
578
to.in6.sin6_family = (sa_family_t)af;
579
ret = inet_pton(af, ip, &to.in6.sin6_addr);
856
580
} else { /* IPv4 */
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
581
to.in.sin_family = (sa_family_t)af;
582
ret = inet_pton(af, ip, &to.in.sin_addr);
862
perror_plus("inet_pton");
868
fprintf_plus(stderr, "Bad address: %s\n", ip);
590
fprintf(stderr, "Bad address: %s\n", ip);
872
594
if(af == AF_INET6){
873
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
874
if(IN6_IS_ADDR_LINKLOCAL
875
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
595
to.in6.sin6_port = htons(port); /* Spurious warnings from
597
-Wunreachable-code */
599
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
600
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
876
602
if(if_index == AVAHI_IF_UNSPEC){
877
fprintf_plus(stderr, "An IPv6 link-local address is"
878
" incomplete without a network interface\n");
603
fprintf(stderr, "An IPv6 link-local address is incomplete"
604
" without a network interface\n");
882
608
/* Set the network interface number as scope */
883
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
609
to.in6.sin6_scope_id = (uint32_t)if_index;
886
((struct sockaddr_in *)&to)->sin_port = htons(port);
612
to.in.sin_port = htons(port); /* Spurious warnings from
614
-Wunreachable-code */
1294
966
signal_received = sig;
1295
967
int old_errno = errno;
1296
/* set main loop to exit */
1297
if(simple_poll != NULL){
1298
avahi_simple_poll_quit(simple_poll);
1303
__attribute__((nonnull, warn_unused_result))
1304
bool get_flags(const char *ifname, struct ifreq *ifr){
1308
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1311
perror_plus("socket");
1315
strcpy(ifr->ifr_name, ifname);
1316
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1320
perror_plus("ioctl SIOCGIFFLAGS");
1328
__attribute__((nonnull, warn_unused_result))
1329
bool good_flags(const char *ifname, const struct ifreq *ifr){
1331
/* Reject the loopback device */
1332
if(ifr->ifr_flags & IFF_LOOPBACK){
1334
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1339
/* Accept point-to-point devices only if connect_to is specified */
1340
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1342
fprintf_plus(stderr, "Accepting point-to-point interface"
1343
" \"%s\"\n", ifname);
1347
/* Otherwise, reject non-broadcast-capable devices */
1348
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1350
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1351
" \"%s\"\n", ifname);
1355
/* Reject non-ARP interfaces (including dummy interfaces) */
1356
if(ifr->ifr_flags & IFF_NOARP){
1358
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1364
/* Accept this device */
1366
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1372
* This function determines if a directory entry in /sys/class/net
1373
* corresponds to an acceptable network device.
1374
* (This function is passed to scandir(3) as a filter function.)
1376
__attribute__((nonnull, warn_unused_result))
1377
int good_interface(const struct dirent *if_entry){
1378
if(if_entry->d_name[0] == '.'){
1383
if(not get_flags(if_entry->d_name, &ifr)){
1385
fprintf_plus(stderr, "Failed to get flags for interface "
1386
"\"%s\"\n", if_entry->d_name);
1391
if(not good_flags(if_entry->d_name, &ifr)){
1398
* This function determines if a network interface is up.
1400
__attribute__((nonnull, warn_unused_result))
1401
bool interface_is_up(const char *interface){
1403
if(not get_flags(interface, &ifr)){
1405
fprintf_plus(stderr, "Failed to get flags for interface "
1406
"\"%s\"\n", interface);
1411
return (bool)(ifr.ifr_flags & IFF_UP);
1415
* This function determines if a network interface is running
1417
__attribute__((nonnull, warn_unused_result))
1418
bool interface_is_running(const char *interface){
1420
if(not get_flags(interface, &ifr)){
1422
fprintf_plus(stderr, "Failed to get flags for interface "
1423
"\"%s\"\n", interface);
1428
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1431
__attribute__((nonnull, pure, warn_unused_result))
1432
int notdotentries(const struct dirent *direntry){
1433
/* Skip "." and ".." */
1434
if(direntry->d_name[0] == '.'
1435
and (direntry->d_name[1] == '\0'
1436
or (direntry->d_name[1] == '.'
1437
and direntry->d_name[2] == '\0'))){
1443
/* Is this directory entry a runnable program? */
1444
__attribute__((nonnull, warn_unused_result))
1445
int runnable_hook(const struct dirent *direntry){
1450
if((direntry->d_name)[0] == '\0'){
1455
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1456
"abcdefghijklmnopqrstuvwxyz"
1459
if((direntry->d_name)[sret] != '\0'){
1460
/* Contains non-allowed characters */
1462
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1468
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1471
perror_plus("Could not stat hook");
1475
if(not (S_ISREG(st.st_mode))){
1476
/* Not a regular file */
1478
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1483
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1484
/* Not executable */
1486
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1492
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1498
__attribute__((nonnull, warn_unused_result))
1499
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1500
mandos_context *mc){
1502
struct timespec now;
1503
struct timespec waited_time;
1504
intmax_t block_time;
1507
if(mc->current_server == NULL){
1509
fprintf_plus(stderr, "Wait until first server is found."
1512
ret = avahi_simple_poll_iterate(s, -1);
1515
fprintf_plus(stderr, "Check current_server if we should run"
1518
/* the current time */
1519
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1521
perror_plus("clock_gettime");
1524
/* Calculating in ms how long time between now and server
1525
who we visted longest time ago. Now - last seen. */
1526
waited_time.tv_sec = (now.tv_sec
1527
- mc->current_server->last_seen.tv_sec);
1528
waited_time.tv_nsec = (now.tv_nsec
1529
- mc->current_server->last_seen.tv_nsec);
1530
/* total time is 10s/10,000ms.
1531
Converting to s from ms by dividing by 1,000,
1532
and ns to ms by dividing by 1,000,000. */
1533
block_time = ((retry_interval
1534
- ((intmax_t)waited_time.tv_sec * 1000))
1535
- ((intmax_t)waited_time.tv_nsec / 1000000));
1538
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1542
if(block_time <= 0){
1543
ret = start_mandos_communication(mc->current_server->ip,
1544
mc->current_server->port,
1545
mc->current_server->if_index,
1546
mc->current_server->af, mc);
1548
avahi_simple_poll_quit(s);
1551
ret = clock_gettime(CLOCK_MONOTONIC,
1552
&mc->current_server->last_seen);
1554
perror_plus("clock_gettime");
1557
mc->current_server = mc->current_server->next;
1558
block_time = 0; /* Call avahi to find new Mandos
1559
servers, but don't block */
1562
ret = avahi_simple_poll_iterate(s, (int)block_time);
1565
if(ret > 0 or errno != EINTR){
1566
return (ret != 1) ? ret : 0;
1572
/* Set effective uid to 0, return errno */
1573
__attribute__((warn_unused_result))
1574
error_t raise_privileges(void){
1575
error_t old_errno = errno;
1576
error_t ret_errno = 0;
1577
if(seteuid(0) == -1){
1584
/* Set effective and real user ID to 0. Return errno. */
1585
__attribute__((warn_unused_result))
1586
error_t raise_privileges_permanently(void){
1587
error_t old_errno = errno;
1588
error_t ret_errno = raise_privileges();
1593
if(setuid(0) == -1){
1600
/* Set effective user ID to unprivileged saved user ID */
1601
__attribute__((warn_unused_result))
1602
error_t lower_privileges(void){
1603
error_t old_errno = errno;
1604
error_t ret_errno = 0;
1605
if(seteuid(uid) == -1){
1612
/* Lower privileges permanently */
1613
__attribute__((warn_unused_result))
1614
error_t lower_privileges_permanently(void){
1615
error_t old_errno = errno;
1616
error_t ret_errno = 0;
1617
if(setuid(uid) == -1){
1624
__attribute__((nonnull))
1625
void run_network_hooks(const char *mode, const char *interface,
1627
struct dirent **direntries = NULL;
1628
if(hookdir_fd == -1){
1629
hookdir_fd = open(hookdir, O_RDONLY);
1630
if(hookdir_fd == -1){
1631
if(errno == ENOENT){
1633
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1634
" found\n", hookdir);
1637
perror_plus("open");
1643
#if __GLIBC_PREREQ(2, 15)
1644
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1645
runnable_hook, alphasort);
1646
#else /* not __GLIBC_PREREQ(2, 15) */
1647
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1649
#endif /* not __GLIBC_PREREQ(2, 15) */
1650
#else /* not __GLIBC__ */
1651
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1653
#endif /* not __GLIBC__ */
1655
perror_plus("scandir");
1658
struct dirent *direntry;
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[i];
1664
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1667
pid_t hook_pid = fork();
1670
/* Raise privileges */
1671
errno = raise_privileges_permanently();
1673
perror_plus("Failed to raise privileges");
1680
perror_plus("setgid");
1683
/* Reset supplementary groups */
1685
ret = setgroups(0, NULL);
1687
perror_plus("setgroups");
1690
ret = dup2(devnull, STDIN_FILENO);
1692
perror_plus("dup2(devnull, STDIN_FILENO)");
1695
ret = close(devnull);
1697
perror_plus("close");
1700
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1702
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1705
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1707
perror_plus("setenv");
1710
ret = setenv("DEVICE", interface, 1);
1712
perror_plus("setenv");
1715
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1717
perror_plus("setenv");
1720
ret = setenv("MODE", mode, 1);
1722
perror_plus("setenv");
1726
ret = asprintf(&delaystring, "%f", (double)delay);
1728
perror_plus("asprintf");
1731
ret = setenv("DELAY", delaystring, 1);
1734
perror_plus("setenv");
1738
if(connect_to != NULL){
1739
ret = setenv("CONNECT", connect_to, 1);
1741
perror_plus("setenv");
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1747
perror_plus("openat");
1748
_exit(EXIT_FAILURE);
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1751
perror_plus("close");
1752
_exit(EXIT_FAILURE);
1754
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1756
perror_plus("fexecve");
1757
_exit(EXIT_FAILURE);
1761
perror_plus("fork");
1766
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1767
perror_plus("waitpid");
1771
if(WIFEXITED(status)){
1772
if(WEXITSTATUS(status) != 0){
1773
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1774
" with status %d\n", direntry->d_name,
1775
WEXITSTATUS(status));
1779
} else if(WIFSIGNALED(status)){
1780
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1781
" signal %d\n", direntry->d_name,
1786
fprintf_plus(stderr, "Warning: network hook \"%s\""
1787
" crashed\n", direntry->d_name);
1793
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1800
perror_plus("close");
1807
__attribute__((nonnull, warn_unused_result))
1808
error_t bring_up_interface(const char *const interface,
1810
error_t old_errno = errno;
1812
struct ifreq network;
1813
unsigned int if_index = if_nametoindex(interface);
1815
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1825
if(not interface_is_up(interface)){
1826
error_t ret_errno = 0, ioctl_errno = 0;
1827
if(not get_flags(interface, &network)){
1829
fprintf_plus(stderr, "Failed to get flags for interface "
1830
"\"%s\"\n", interface);
1834
network.ifr_flags |= IFF_UP; /* set flag */
1836
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1839
perror_plus("socket");
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1847
perror_plus("close");
1854
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1858
/* Raise privileges */
1859
ret_errno = raise_privileges();
1862
perror_plus("Failed to raise privileges");
1867
bool restore_loglevel = false;
1869
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1870
messages about the network interface to mess up the prompt */
1871
ret_linux = klogctl(8, NULL, 5);
1872
if(ret_linux == -1){
1873
perror_plus("klogctl");
1875
restore_loglevel = true;
1878
#endif /* __linux__ */
1879
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1880
ioctl_errno = errno;
1882
if(restore_loglevel){
1883
ret_linux = klogctl(7, NULL, 0);
1884
if(ret_linux == -1){
1885
perror_plus("klogctl");
1888
#endif /* __linux__ */
1890
/* If raise_privileges() succeeded above */
1892
/* Lower privileges */
1893
ret_errno = lower_privileges();
1896
perror_plus("Failed to lower privileges");
1900
/* Close the socket */
1901
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1903
perror_plus("close");
1906
if(ret_setflags == -1){
1907
errno = ioctl_errno;
1908
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1913
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1917
/* Sleep checking until interface is running.
1918
Check every 0.25s, up to total time of delay */
1919
for(int i=0; i < delay * 4; i++){
1920
if(interface_is_running(interface)){
1923
struct timespec sleeptime = { .tv_nsec = 250000000 };
1924
ret = nanosleep(&sleeptime, NULL);
1925
if(ret == -1 and errno != EINTR){
1926
perror_plus("nanosleep");
1934
__attribute__((nonnull, warn_unused_result))
1935
error_t take_down_interface(const char *const interface){
1936
error_t old_errno = errno;
1937
struct ifreq network;
1938
unsigned int if_index = if_nametoindex(interface);
1940
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1944
if(interface_is_up(interface)){
1945
error_t ret_errno = 0, ioctl_errno = 0;
1946
if(not get_flags(interface, &network) and debug){
1948
fprintf_plus(stderr, "Failed to get flags for interface "
1949
"\"%s\"\n", interface);
1953
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1955
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1958
perror_plus("socket");
1964
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1968
/* Raise privileges */
1969
ret_errno = raise_privileges();
1972
perror_plus("Failed to raise privileges");
1975
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1976
ioctl_errno = errno;
1978
/* If raise_privileges() succeeded above */
1980
/* Lower privileges */
1981
ret_errno = lower_privileges();
1984
perror_plus("Failed to lower privileges");
1988
/* Close the socket */
1989
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1991
perror_plus("close");
1994
if(ret_setflags == -1){
1995
errno = ioctl_errno;
1996
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2001
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
968
if(mc.simple_poll != NULL){
969
avahi_simple_poll_quit(mc.simple_poll);
2009
974
int main(int argc, char *argv[]){
2010
mandos_context mc = { .server = NULL, .dh_bits = 0,
2011
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2013
.interfaces = NULL, .interfaces_size = 0 };
2014
975
AvahiSServiceBrowser *sb = NULL;
2017
978
intmax_t tmpmax;
2019
980
int exitcode = EXIT_SUCCESS;
2020
char *interfaces_to_take_down = NULL;
2021
size_t interfaces_to_take_down_size = 0;
2022
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2023
char old_tempdir[] = "/tmp/mandosXXXXXX";
2024
char *tempdir = NULL;
981
const char *interface = "eth0";
982
struct ifreq network;
984
bool take_down_interface = false;
987
char *connect_to = NULL;
988
char tempdir[] = "/tmp/mandosXXXXXX";
989
bool tempdir_created = false;
2025
990
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2026
991
const char *seckey = PATHDIR "/" SECKEY;
2027
992
const char *pubkey = PATHDIR "/" PUBKEY;
2028
char *interfaces_hooks = NULL;
2030
994
bool gnutls_initialized = false;
2031
995
bool gpgme_initialized = false;
2032
996
float delay = 2.5f;
2033
double retry_interval = 10; /* 10s between trying a server and
2034
retrying the same server again */
2036
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
998
struct sigaction old_sigterm_action;
2037
999
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
2042
/* Lower any group privileges we might have, just to be safe */
2046
perror_plus("setgid");
2049
/* Lower user privileges (temporarily) */
2053
perror_plus("seteuid");
2061
1002
struct argp_option options[] = {
2062
1003
{ .name = "debug", .key = 128,
2151
1071
delay = strtof(arg, &tmp);
2152
1072
if(errno != 0 or tmp == arg or *tmp != '\0'){
2153
argp_error(state, "Bad delay");
2155
case 132: /* --retry */
2157
retry_interval = strtod(arg, &tmp);
2158
if(errno != 0 or tmp == arg or *tmp != '\0'
2159
or (retry_interval * 1000) > INT_MAX
2160
or retry_interval < 0){
2161
argp_error(state, "Bad retry interval");
2164
case 133: /* --network-hook-dir */
2168
* These reproduce what we would get without ARGP_NO_HELP
2170
case '?': /* --help */
2171
argp_state_help(state, state->out_stream,
2172
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
2173
& ~(unsigned int)ARGP_HELP_EXIT_OK);
2174
case -3: /* --usage */
2175
argp_state_help(state, state->out_stream,
2176
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2177
case 'V': /* --version */
2178
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
2179
exit(argp_err_exit_status);
1073
fprintf(stderr, "Bad delay\n");
2182
1082
return ARGP_ERR_UNKNOWN;
2187
1087
struct argp argp = { .options = options, .parser = parse_opt,
2188
1088
.args_doc = "",
2189
1089
.doc = "Mandos client -- Get and decrypt"
2190
1090
" passwords from a Mandos server" };
2191
ret = argp_parse(&argp, argc, argv,
2192
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2199
perror_plus("argp_parse");
2200
exitcode = EX_OSERR;
2203
exitcode = EX_USAGE;
2209
/* Work around Debian bug #633582:
2210
<http://bugs.debian.org/633582> */
2212
/* Re-raise privileges */
2213
ret_errno = raise_privileges();
2216
perror_plus("Failed to raise privileges");
2220
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2221
int seckey_fd = open(seckey, O_RDONLY);
2222
if(seckey_fd == -1){
2223
perror_plus("open");
2225
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2227
perror_plus("fstat");
2229
if(S_ISREG(st.st_mode)
2230
and st.st_uid == 0 and st.st_gid == 0){
2231
ret = fchown(seckey_fd, uid, gid);
2233
perror_plus("fchown");
2237
TEMP_FAILURE_RETRY(close(seckey_fd));
2241
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2242
int pubkey_fd = open(pubkey, O_RDONLY);
2243
if(pubkey_fd == -1){
2244
perror_plus("open");
2246
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2248
perror_plus("fstat");
2250
if(S_ISREG(st.st_mode)
2251
and st.st_uid == 0 and st.st_gid == 0){
2252
ret = fchown(pubkey_fd, uid, gid);
2254
perror_plus("fchown");
2258
TEMP_FAILURE_RETRY(close(pubkey_fd));
2262
/* Lower privileges */
2263
ret_errno = lower_privileges();
2266
perror_plus("Failed to lower privileges");
2271
/* Remove invalid interface names (except "none") */
2273
char *interface = NULL;
2274
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2276
if(strcmp(interface, "none") != 0
2277
and if_nametoindex(interface) == 0){
2278
if(interface[0] != '\0'){
2279
fprintf_plus(stderr, "Not using nonexisting interface"
2280
" \"%s\"\n", interface);
2282
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2288
/* Run network hooks */
2290
if(mc.interfaces != NULL){
2291
interfaces_hooks = malloc(mc.interfaces_size);
2292
if(interfaces_hooks == NULL){
2293
perror_plus("malloc");
2296
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2297
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2299
run_network_hooks("start", interfaces_hooks != NULL ?
2300
interfaces_hooks : "", delay);
1091
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1092
if(ret == ARGP_ERR_UNKNOWN){
1093
fprintf(stderr, "Unknown error while parsing arguments\n");
1094
exitcode = EXIT_FAILURE;
2342
1137
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2344
perror_plus("sigaction");
1139
perror("sigaction");
1140
return EXIT_FAILURE;
2347
1142
if(old_sigterm_action.sa_handler != SIG_IGN){
2348
1143
ret = sigaction(SIGINT, &sigterm_action, NULL);
2350
perror_plus("sigaction");
2351
exitcode = EX_OSERR;
1145
perror("sigaction");
1146
exitcode = EXIT_FAILURE;
2355
1150
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2357
perror_plus("sigaction");
1152
perror("sigaction");
1153
return EXIT_FAILURE;
2360
1155
if(old_sigterm_action.sa_handler != SIG_IGN){
2361
1156
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2363
perror_plus("sigaction");
2364
exitcode = EX_OSERR;
1158
perror("sigaction");
1159
exitcode = EXIT_FAILURE;
2368
1163
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2370
perror_plus("sigaction");
1165
perror("sigaction");
1166
return EXIT_FAILURE;
2373
1168
if(old_sigterm_action.sa_handler != SIG_IGN){
2374
1169
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2376
perror_plus("sigaction");
2377
exitcode = EX_OSERR;
2382
/* If no interfaces were specified, make a list */
2383
if(mc.interfaces == NULL){
2384
struct dirent **direntries = NULL;
2385
/* Look for any good interfaces */
2386
ret = scandir(sys_class_net, &direntries, good_interface,
2389
/* Add all found interfaces to interfaces list */
2390
for(int i = 0; i < ret; ++i){
2391
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2392
direntries[i]->d_name);
2395
perror_plus("argz_add");
2396
free(direntries[i]);
2400
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2401
direntries[i]->d_name);
2403
free(direntries[i]);
2410
fprintf_plus(stderr, "Could not find a network interface\n");
2411
exitcode = EXIT_FAILURE;
2416
/* Bring up interfaces which are down, and remove any "none"s */
2418
char *interface = NULL;
2419
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2421
/* If interface name is "none", stop bringing up interfaces.
2422
Also remove all instances of "none" from the list */
2423
if(strcmp(interface, "none") == 0){
2424
argz_delete(&mc.interfaces, &mc.interfaces_size,
2427
while((interface = argz_next(mc.interfaces,
2428
mc.interfaces_size, interface))){
2429
if(strcmp(interface, "none") == 0){
2430
argz_delete(&mc.interfaces, &mc.interfaces_size,
1171
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
1177
/* If the interface is down, bring it up */
1178
if(interface[0] != '\0'){
1179
if_index = (AvahiIfIndex) if_nametoindex(interface);
1181
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1182
exitcode = EXIT_FAILURE;
1191
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1192
messages to mess up the prompt */
1193
ret = klogctl(8, NULL, 5);
1194
bool restore_loglevel = true;
1196
restore_loglevel = false;
1199
#endif /* __linux__ */
1201
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1204
exitcode = EXIT_FAILURE;
1206
if(restore_loglevel){
1207
ret = klogctl(7, NULL, 0);
1212
#endif /* __linux__ */
1215
strcpy(network.ifr_name, interface);
1216
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1218
perror("ioctl SIOCGIFFLAGS");
1220
if(restore_loglevel){
1221
ret = klogctl(7, NULL, 0);
1226
#endif /* __linux__ */
1227
exitcode = EXIT_FAILURE;
1230
if((network.ifr_flags & IFF_UP) == 0){
1231
network.ifr_flags |= IFF_UP;
1232
take_down_interface = true;
1233
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1235
take_down_interface = false;
1236
perror("ioctl SIOCSIFFLAGS");
1237
exitcode = EXIT_FAILURE;
1239
if(restore_loglevel){
1240
ret = klogctl(7, NULL, 0);
1245
#endif /* __linux__ */
1249
/* sleep checking until interface is running */
1250
for(int i=0; i < delay * 4; i++){
1251
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1253
perror("ioctl SIOCGIFFLAGS");
1254
} else if(network.ifr_flags & IFF_RUNNING){
2437
bool interface_was_up = interface_is_up(interface);
2438
errno = bring_up_interface(interface, delay);
2439
if(not interface_was_up){
2441
perror_plus("Failed to bring up interface");
2443
errno = argz_add(&interfaces_to_take_down,
2444
&interfaces_to_take_down_size,
2447
perror_plus("argz_add");
2452
if(debug and (interfaces_to_take_down == NULL)){
2453
fprintf_plus(stderr, "No interfaces were brought up\n");
2457
/* If we only got one interface, explicitly use only that one */
2458
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2460
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2463
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2470
ret = init_gnutls_global(pubkey, seckey, &mc);
2472
fprintf_plus(stderr, "init_gnutls_global failed\n");
2473
exitcode = EX_UNAVAILABLE;
1257
struct timespec sleeptime = { .tv_nsec = 250000000 };
1258
ret = nanosleep(&sleeptime, NULL);
1259
if(ret == -1 and errno != EINTR){
1260
perror("nanosleep");
1263
if(not take_down_interface){
1264
/* We won't need the socket anymore */
1265
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1271
if(restore_loglevel){
1272
/* Restores kernel loglevel to default */
1273
ret = klogctl(7, NULL, 0);
1278
#endif /* __linux__ */
1303
ret = init_gnutls_global(pubkey, seckey);
1305
fprintf(stderr, "init_gnutls_global failed\n");
1306
exitcode = EXIT_FAILURE;
2476
1309
gnutls_initialized = true;
2670
1471
gpgme_release(mc.ctx);
2673
/* Cleans up the circular linked list of Mandos servers the client
2675
if(mc.current_server != NULL){
2676
mc.current_server->prev->next = NULL;
2677
while(mc.current_server != NULL){
2678
server *next = mc.current_server->next;
2680
#pragma GCC diagnostic push
2681
#pragma GCC diagnostic ignored "-Wcast-qual"
2683
free((char *)(mc.current_server->ip));
2685
#pragma GCC diagnostic pop
2687
free(mc.current_server);
2688
mc.current_server = next;
2692
/* Re-raise privileges */
2694
ret_errno = raise_privileges();
2697
perror_plus("Failed to raise privileges");
2700
/* Run network hooks */
2701
run_network_hooks("stop", interfaces_hooks != NULL ?
2702
interfaces_hooks : "", delay);
2704
/* Take down the network interfaces which were brought up */
2706
char *interface = NULL;
2707
while((interface=argz_next(interfaces_to_take_down,
2708
interfaces_to_take_down_size,
2710
ret_errno = take_down_interface(interface);
2713
perror_plus("Failed to take down interface");
2716
if(debug and (interfaces_to_take_down == NULL)){
2717
fprintf_plus(stderr, "No interfaces needed to be taken"
2723
ret_errno = lower_privileges_permanently();
2726
perror_plus("Failed to lower privileges permanently");
2730
free(interfaces_to_take_down);
2731
free(interfaces_hooks);
2733
/* Removes the GPGME temp directory and all files inside */
2734
if(tempdir != NULL){
2735
struct dirent **direntries = NULL;
2736
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2738
if(tempdir_fd == -1){
2739
perror_plus("open");
2742
#if __GLIBC_PREREQ(2, 15)
2743
int numentries = scandirat(tempdir_fd, ".", &direntries,
2744
notdotentries, alphasort);
2745
#else /* not __GLIBC_PREREQ(2, 15) */
2746
int numentries = scandir(tempdir, &direntries, notdotentries,
2748
#endif /* not __GLIBC_PREREQ(2, 15) */
2749
#else /* not __GLIBC__ */
2750
int numentries = scandir(tempdir, &direntries, notdotentries,
2752
#endif /* not __GLIBC__ */
2753
if(numentries >= 0){
2754
for(int i = 0; i < numentries; i++){
2755
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2757
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2758
" \"%s\", 0): %s\n", tempdir,
2759
direntries[i]->d_name, strerror(errno));
2761
free(direntries[i]);
2764
/* need to clean even if 0 because man page doesn't specify */
2766
if(numentries == -1){
2767
perror_plus("scandir");
2769
ret = rmdir(tempdir);
2770
if(ret == -1 and errno != ENOENT){
2771
perror_plus("rmdir");
2774
TEMP_FAILURE_RETRY(close(tempdir_fd));
1474
/* Take down the network interface */
1475
if(take_down_interface){
1476
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1478
perror("ioctl SIOCGIFFLAGS");
1479
} else if(network.ifr_flags & IFF_UP) {
1480
network.ifr_flags &= ~IFF_UP; /* clear flag */
1481
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1483
perror("ioctl SIOCSIFFLAGS");
1486
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1492
/* Removes the temp directory used by GPGME */
1493
if(tempdir_created){
1495
struct dirent *direntry;
1496
d = opendir(tempdir);
1498
if(errno != ENOENT){
1503
direntry = readdir(d);
1504
if(direntry == NULL){
1507
/* Skip "." and ".." */
1508
if(direntry->d_name[0] == '.'
1509
and (direntry->d_name[1] == '\0'
1510
or (direntry->d_name[1] == '.'
1511
and direntry->d_name[2] == '\0'))){
1514
char *fullname = NULL;
1515
ret = asprintf(&fullname, "%s/%s", tempdir,
1521
ret = remove(fullname);
1523
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1530
ret = rmdir(tempdir);
1531
if(ret == -1 and errno != ENOENT){
2779
1537
sigemptyset(&old_sigterm_action.sa_mask);
2780
1538
old_sigterm_action.sa_handler = SIG_DFL;
2781
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2782
&old_sigterm_action,
1539
ret = sigaction(signal_received, &old_sigterm_action, NULL);
2785
perror_plus("sigaction");
2788
ret = raise(signal_received);
2789
} while(ret != 0 and errno == EINTR);
2791
perror_plus("raise");
2794
TEMP_FAILURE_RETRY(pause());
1541
perror("sigaction");
1543
raise(signal_received);
2797
1546
return exitcode;