166
152
const char *priority;
168
154
server *current_server;
170
size_t interfaces_size;
171
155
} mandos_context;
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
157
/* global context so signal handler can reach it*/
158
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
176
163
sig_atomic_t quit_now = 0;
177
164
int signal_received = 0;
179
166
/* Function to use when printing errors */
180
167
void perror_plus(const char *print_text){
182
168
fprintf(stderr, "Mandos plugin %s: ",
183
169
program_invocation_short_name);
185
170
perror(print_text);
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));
199
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
200
175
* bytes. "buffer_capacity" is how much is currently allocated,
201
176
* "buffer_length" is how much is already used.
203
__attribute__((nonnull, warn_unused_result))
204
178
size_t incbuffer(char **buffer, size_t buffer_length,
205
size_t buffer_capacity){
179
size_t buffer_capacity){
206
180
if(buffer_length + BUFFER_SIZE > buffer_capacity){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
209
int old_errno = errno;
181
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
216
185
buffer_capacity += BUFFER_SIZE;
218
187
return buffer_capacity;
221
190
/* 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){
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
226
195
server *new_server = malloc(sizeof(server));
227
196
if(new_server == NULL){
228
197
perror_plus("malloc");
231
200
*new_server = (server){ .ip = strdup(ip),
233
.if_index = if_index,
202
.if_index = if_index,
235
204
if(new_server->ip == NULL){
236
205
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
208
/* Special case of first server */
255
if(*current_server == NULL){
209
if (mc.current_server == NULL){
256
210
new_server->next = new_server;
257
211
new_server->prev = new_server;
258
*current_server = new_server;
212
mc.current_server = new_server;
213
/* Place the new server last in the list */
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
215
new_server->next = mc.current_server;
216
new_server->prev = mc.current_server->prev;
263
217
new_server->prev->next = new_server;
264
(*current_server)->prev = new_server;
218
mc.current_server->prev = new_server;
220
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
perror_plus("clock_gettime");
270
229
* 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,
231
static bool init_gpgme(const char *seckey,
232
const char *pubkey, const char *tempdir){
277
233
gpgme_error_t rc;
278
234
gpgme_engine_info_t engine_info;
281
238
* Helper function to insert pub and seckey to the engine keyring.
283
bool import_key(const char * const filename){
240
bool import_key(const char *filename){
286
243
gpgme_data_t pgp_data;
379
332
ssize_t plaintext_length = 0;
382
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
385
338
/* Create new GPGME data buffer from memory cryptotext */
386
339
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
388
341
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));
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
343
gpgme_strsource(rc), gpgme_strerror(rc));
394
347
/* Create new empty GPGME data buffer for the plaintext */
395
348
rc = gpgme_data_new(&dh_plain);
396
349
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));
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
351
gpgme_strsource(rc), gpgme_strerror(rc));
400
352
gpgme_data_release(dh_crypto);
404
356
/* Decrypt data from the cryptotext data buffer to the plaintext
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
358
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
407
359
if(rc != GPG_ERR_NO_ERROR){
408
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
409
gpgme_strsource(rc), gpgme_strerror(rc));
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
410
362
plaintext_length = -1;
412
364
gpgme_decrypt_result_t result;
413
result = gpgme_op_decrypt_result(mc->ctx);
365
result = gpgme_op_decrypt_result(mc.ctx);
414
366
if(result == NULL){
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
367
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);
369
fprintf(stderr, "Unsupported algorithm: %s\n",
370
result->unsupported_algorithm);
371
fprintf(stderr, "Wrong key usage: %u\n",
372
result->wrong_key_usage);
421
373
if(result->file_name != NULL){
422
fprintf_plus(stderr, "File name: %s\n", result->file_name);
374
fprintf(stderr, "File name: %s\n", result->file_name);
424
376
gpgme_recipient_t recipient;
425
377
recipient = result->recipients;
426
378
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
379
fprintf(stderr, "Public key algorithm: %s\n",
380
gpgme_pubkey_algo_name(recipient->pubkey_algo));
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
383
recipient->status == GPG_ERR_NO_SECKEY
434
385
recipient = recipient->next;
536
484
/* OpenPGP credentials */
537
ret = gnutls_certificate_allocate_credentials(&mc->cred);
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
538
486
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
540
safer_gnutls_strerror(ret));
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
541
489
gnutls_global_deinit();
546
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
547
" secret key %s as GnuTLS credentials\n",
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
495
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
552
499
ret = gnutls_certificate_set_openpgp_key_file
553
(mc->cred, pubkeyfilename, seckeyfilename,
500
(mc.cred, pubkeyfilename, seckeyfilename,
554
501
GNUTLS_OPENPGP_FMT_BASE64);
555
502
if(ret != GNUTLS_E_SUCCESS){
557
"Error[%d] while reading the OpenPGP key pair ('%s',"
558
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
559
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
560
safer_gnutls_strerror(ret));
504
"Error[%d] while reading the OpenPGP key pair ('%s',"
505
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
564
511
/* GnuTLS server initialization */
565
ret = gnutls_dh_params_init(&mc->dh_params);
512
ret = gnutls_dh_params_init(&mc.dh_params);
566
513
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
568
" initialization: %s\n",
569
safer_gnutls_strerror(ret));
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
515
" %s\n", safer_gnutls_strerror(ret));
572
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
518
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
573
519
if(ret != GNUTLS_E_SUCCESS){
574
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
575
safer_gnutls_strerror(ret));
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
521
safer_gnutls_strerror(ret));
579
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
525
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
585
gnutls_certificate_free_credentials(mc->cred);
531
gnutls_certificate_free_credentials(mc.cred);
586
532
gnutls_global_deinit();
587
gnutls_dh_params_deinit(mc->dh_params);
533
gnutls_dh_params_deinit(mc.dh_params);
591
__attribute__((nonnull, warn_unused_result))
592
static int init_gnutls_session(gnutls_session_t *session,
537
static int init_gnutls_session(gnutls_session_t *session){
595
539
/* GnuTLS session creation */
650
593
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
651
594
__attribute__((unused)) const char *txt){}
653
/* Set effective uid to 0, return errno */
654
__attribute__((warn_unused_result))
655
error_t raise_privileges(void){
656
error_t old_errno = errno;
657
error_t ret_errno = 0;
658
if(seteuid(0) == -1){
665
/* Set effective and real user ID to 0. Return errno. */
666
__attribute__((warn_unused_result))
667
error_t raise_privileges_permanently(void){
668
error_t old_errno = errno;
669
error_t ret_errno = raise_privileges();
681
/* Set effective user ID to unprivileged saved user ID */
682
__attribute__((warn_unused_result))
683
error_t lower_privileges(void){
684
error_t old_errno = errno;
685
error_t ret_errno = 0;
686
if(seteuid(uid) == -1){
693
/* Lower privileges permanently */
694
__attribute__((warn_unused_result))
695
error_t lower_privileges_permanently(void){
696
error_t old_errno = errno;
697
error_t ret_errno = 0;
698
if(setuid(uid) == -1){
705
/* Helper function to add_local_route() and delete_local_route() */
706
__attribute__((nonnull, warn_unused_result))
707
static bool add_delete_local_route(const bool add,
709
AvahiIfIndex if_index){
711
char helper[] = "mandos-client-iprouteadddel";
712
char add_arg[] = "add";
713
char delete_arg[] = "delete";
714
char debug_flag[] = "--debug";
715
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
716
if(pluginhelperdir == NULL){
718
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
719
" variable not set; cannot run helper\n");
724
char interface[IF_NAMESIZE];
725
if(if_indextoname((unsigned int)if_index, interface) == NULL){
726
perror_plus("if_indextoname");
730
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
732
perror_plus("open(\"/dev/null\", O_RDONLY)");
738
/* Raise privileges */
739
errno = raise_privileges_permanently();
741
perror_plus("Failed to raise privileges");
742
/* _exit(EX_NOPERM); */
748
perror_plus("setgid");
751
/* Reset supplementary groups */
753
ret = setgroups(0, NULL);
755
perror_plus("setgroups");
759
ret = dup2(devnull, STDIN_FILENO);
761
perror_plus("dup2(devnull, STDIN_FILENO)");
764
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
766
perror_plus("close");
769
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
771
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
774
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
779
if(helperdir_fd == -1){
781
_exit(EX_UNAVAILABLE);
783
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
786
perror_plus("openat");
787
_exit(EX_UNAVAILABLE);
789
TEMP_FAILURE_RETRY(close(helperdir_fd));
791
#pragma GCC diagnostic push
792
#pragma GCC diagnostic ignored "-Wcast-qual"
794
if(fexecve(helper_fd, (char *const [])
795
{ helper, add ? add_arg : delete_arg, (char *)address,
796
interface, debug ? debug_flag : NULL, NULL },
799
#pragma GCC diagnostic pop
801
perror_plus("fexecve");
813
pret = waitpid(pid, &status, 0);
814
if(pret == -1 and errno == EINTR and quit_now){
815
int errno_raising = 0;
816
if((errno = raise_privileges()) != 0){
817
errno_raising = errno;
818
perror_plus("Failed to raise privileges in order to"
819
" kill helper program");
821
if(kill(pid, SIGTERM) == -1){
824
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
825
perror_plus("Failed to lower privileges after killing"
830
} while(pret == -1 and errno == EINTR);
832
perror_plus("waitpid");
835
if(WIFEXITED(status)){
836
if(WEXITSTATUS(status) != 0){
837
fprintf_plus(stderr, "Error: iprouteadddel exited"
838
" with status %d\n", WEXITSTATUS(status));
843
if(WIFSIGNALED(status)){
844
fprintf_plus(stderr, "Error: iprouteadddel died by"
845
" signal %d\n", WTERMSIG(status));
848
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
852
__attribute__((nonnull, warn_unused_result))
853
static bool add_local_route(const char *address,
854
AvahiIfIndex if_index){
856
fprintf_plus(stderr, "Adding route to %s\n", address);
858
return add_delete_local_route(true, address, if_index);
861
__attribute__((nonnull, warn_unused_result))
862
static bool delete_local_route(const char *address,
863
AvahiIfIndex if_index){
865
fprintf_plus(stderr, "Removing route to %s\n", address);
867
return add_delete_local_route(false, address, if_index);
870
596
/* Called when a Mandos server is found */
871
__attribute__((nonnull, warn_unused_result))
872
static int start_mandos_communication(const char *ip, in_port_t port,
597
static int start_mandos_communication(const char *ip, uint16_t port,
873
598
AvahiIfIndex if_index,
874
int af, mandos_context *mc){
875
600
int ret, tcp_sd = -1;
877
struct sockaddr_storage to;
603
struct sockaddr_in in;
604
struct sockaddr_in6 in6;
878
606
char *buffer = NULL;
879
607
char *decrypted_buffer = NULL;
880
608
size_t buffer_length = 0;
1008
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1009
710
perror_plus("if_indextoname");
1011
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
1012
"\n", ip, interface, (uintmax_t)port);
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
ip, interface, port);
1015
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
1016
ip, (uintmax_t)port);
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
1018
719
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
1019
720
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1021
ret = getnameinfo((struct sockaddr *)&to,
1022
sizeof(struct sockaddr_in6),
1023
addrstr, sizeof(addrstr), NULL, 0,
1026
ret = getnameinfo((struct sockaddr *)&to,
1027
sizeof(struct sockaddr_in),
1028
addrstr, sizeof(addrstr), NULL, 0,
1031
if(ret == EAI_SYSTEM){
1032
perror_plus("getnameinfo");
1033
} else if(ret != 0) {
1034
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
1035
} else if(strcmp(addrstr, ip) != 0){
1036
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1047
ret = connect(tcp_sd, (struct sockaddr *)&to,
1048
sizeof(struct sockaddr_in6));
1050
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1051
sizeof(struct sockaddr_in));
1054
if(errno == ENETUNREACH
1055
and if_index != AVAHI_IF_UNSPEC
1056
and connect_to == NULL
1057
and not route_added and
1058
((af == AF_INET6 and not
1059
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1061
or (af == AF_INET and
1062
/* Not a a IPv4LL address */
1063
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1064
& 0xFFFF0000L) != 0xA9FE0000L))){
1065
/* Work around Avahi bug - Avahi does not announce link-local
1066
addresses if it has a global address, so local hosts with
1067
*only* a link-local address (e.g. Mandos clients) cannot
1068
connect to a Mandos server announced by Avahi on a server
1069
host with a global address. Work around this by retrying
1070
with an explicit route added with the server's address.
1072
Avahi bug reference:
1073
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1074
https://bugs.debian.org/587961
1077
fprintf_plus(stderr, "Mandos server unreachable, trying"
1081
route_added = add_local_route(ip, if_index);
1087
if(errno != ECONNREFUSED or debug){
1089
perror_plus("connect");
723
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
726
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
730
perror_plus("inet_ntop");
732
if(strcmp(addrstr, ip) != 0){
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
744
ret = connect(tcp_sd, &to.in6, sizeof(to));
746
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
749
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
751
perror_plus("connect");
1102
762
const char *out = mandos_protocol_version;
1355
1000
char ip[AVAHI_ADDRESS_STR_MAX];
1356
1001
avahi_address_snprint(ip, sizeof(ip), address);
1358
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1359
PRIdMAX ") on port %" PRIu16 "\n", name,
1360
host_name, ip, (intmax_t)interface, port);
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1004
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1005
ip, (intmax_t)interface, port);
1362
int ret = start_mandos_communication(ip, (in_port_t)port,
1364
avahi_proto_to_af(proto),
1007
int ret = start_mandos_communication(ip, port, interface,
1008
avahi_proto_to_af(proto));
1367
avahi_simple_poll_quit(simple_poll);
1010
avahi_simple_poll_quit(mc.simple_poll);
1369
if(not add_server(ip, (in_port_t)port, interface,
1370
avahi_proto_to_af(proto),
1371
&((mandos_context*)mc)->current_server)){
1372
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
1447
1079
signal_received = sig;
1448
1080
int old_errno = errno;
1449
1081
/* set main loop to exit */
1450
if(simple_poll != NULL){
1451
avahi_simple_poll_quit(simple_poll);
1082
if(mc.simple_poll != NULL){
1083
avahi_simple_poll_quit(mc.simple_poll);
1453
1085
errno = old_errno;
1456
__attribute__((nonnull, warn_unused_result))
1457
bool get_flags(const char *ifname, struct ifreq *ifr){
1461
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1464
perror_plus("socket");
1468
strcpy(ifr->ifr_name, ifname);
1469
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1093
int good_interface(const struct dirent *if_entry){
1095
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1099
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1102
perror_plus("asprintf");
1105
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1107
perror_plus("open");
1112
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1115
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
flagstring[(size_t)to_read] = '\0';
1117
if(flagstring == NULL){
1118
perror_plus("malloc");
1123
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1126
perror_plus("read");
1140
tmpmax = strtoimax(flagstring, &tmp, 0);
1141
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1142
and not (isspace(*tmp)))
1143
or tmpmax != (ifreq_flags)tmpmax){
1473
perror_plus("ioctl SIOCGIFFLAGS");
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1481
__attribute__((nonnull, warn_unused_result))
1482
bool good_flags(const char *ifname, const struct ifreq *ifr){
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1484
1153
/* Reject the loopback device */
1485
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
if(flags & IFF_LOOPBACK){
1487
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1492
1161
/* Accept point-to-point devices only if connect_to is specified */
1493
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1495
fprintf_plus(stderr, "Accepting point-to-point interface"
1496
" \"%s\"\n", ifname);
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1500
1169
/* Otherwise, reject non-broadcast-capable devices */
1501
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
if(not (flags & IFF_BROADCAST)){
1503
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1504
" \"%s\"\n", ifname);
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1508
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1509
if(ifr->ifr_flags & IFF_NOARP){
1178
if(flags & IFF_NOARP){
1511
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1517
1185
/* Accept this device */
1519
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1525
* This function determines if a directory entry in /sys/class/net
1526
* corresponds to an acceptable network device.
1527
* (This function is passed to scandir(3) as a filter function.)
1529
__attribute__((nonnull, warn_unused_result))
1530
int good_interface(const struct dirent *if_entry){
1531
if(if_entry->d_name[0] == '.'){
1536
if(not get_flags(if_entry->d_name, &ifr)){
1538
fprintf_plus(stderr, "Failed to get flags for interface "
1539
"\"%s\"\n", if_entry->d_name);
1544
if(not good_flags(if_entry->d_name, &ifr)){
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1551
* This function determines if a network interface is up.
1553
__attribute__((nonnull, warn_unused_result))
1554
bool interface_is_up(const char *interface){
1556
if(not get_flags(interface, &ifr)){
1558
fprintf_plus(stderr, "Failed to get flags for interface "
1559
"\"%s\"\n", interface);
1564
return (bool)(ifr.ifr_flags & IFF_UP);
1568
* This function determines if a network interface is running
1570
__attribute__((nonnull, warn_unused_result))
1571
bool interface_is_running(const char *interface){
1573
if(not get_flags(interface, &ifr)){
1575
fprintf_plus(stderr, "Failed to get flags for interface "
1576
"\"%s\"\n", interface);
1581
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1584
__attribute__((nonnull, pure, warn_unused_result))
1585
1193
int notdotentries(const struct dirent *direntry){
1586
1194
/* Skip "." and ".." */
1587
1195
if(direntry->d_name[0] == '.'
1596
/* Is this directory entry a runnable program? */
1597
__attribute__((nonnull, warn_unused_result))
1598
int runnable_hook(const struct dirent *direntry){
1603
if((direntry->d_name)[0] == '\0'){
1608
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1609
"abcdefghijklmnopqrstuvwxyz"
1612
if((direntry->d_name)[sret] != '\0'){
1613
/* Contains non-allowed characters */
1615
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1621
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1624
perror_plus("Could not stat hook");
1628
if(not (S_ISREG(st.st_mode))){
1629
/* Not a regular file */
1631
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1636
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1637
/* Not executable */
1639
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1645
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1651
__attribute__((nonnull, warn_unused_result))
1652
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1653
mandos_context *mc){
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1655
1206
struct timespec now;
1656
1207
struct timespec waited_time;
1657
1208
intmax_t block_time;
1660
if(mc->current_server == NULL){
1662
fprintf_plus(stderr, "Wait until first server is found."
1211
if(mc.current_server == NULL){
1214
"Wait until first server is found. No timeout!\n");
1665
1216
ret = avahi_simple_poll_iterate(s, -1);
1668
fprintf_plus(stderr, "Check current_server if we should run"
1219
fprintf(stderr, "Check current_server if we should run it,"
1671
1222
/* the current time */
1672
1223
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1715
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1718
if(ret > 0 or errno != EINTR){
1268
if (ret > 0 or errno != EINTR) {
1719
1269
return (ret != 1) ? ret : 0;
1725
__attribute__((nonnull))
1726
void run_network_hooks(const char *mode, const char *interface,
1728
struct dirent **direntries = NULL;
1729
if(hookdir_fd == -1){
1730
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1732
if(hookdir_fd == -1){
1733
if(errno == ENOENT){
1735
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1736
" found\n", hookdir);
1739
perror_plus("open");
1745
#if __GLIBC_PREREQ(2, 15)
1746
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1747
runnable_hook, alphasort);
1748
#else /* not __GLIBC_PREREQ(2, 15) */
1749
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1751
#endif /* not __GLIBC_PREREQ(2, 15) */
1752
#else /* not __GLIBC__ */
1753
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1755
#endif /* not __GLIBC__ */
1757
perror_plus("scandir");
1760
struct dirent *direntry;
1762
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1764
perror_plus("open(\"/dev/null\", O_RDONLY)");
1767
for(int i = 0; i < numhooks; i++){
1768
direntry = direntries[i];
1770
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1773
pid_t hook_pid = fork();
1776
/* Raise privileges */
1777
errno = raise_privileges_permanently();
1779
perror_plus("Failed to raise privileges");
1786
perror_plus("setgid");
1789
/* Reset supplementary groups */
1791
ret = setgroups(0, NULL);
1793
perror_plus("setgroups");
1796
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1798
perror_plus("setenv");
1801
ret = setenv("DEVICE", interface, 1);
1803
perror_plus("setenv");
1806
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1808
perror_plus("setenv");
1811
ret = setenv("MODE", mode, 1);
1813
perror_plus("setenv");
1817
ret = asprintf(&delaystring, "%f", (double)delay);
1819
perror_plus("asprintf");
1822
ret = setenv("DELAY", delaystring, 1);
1825
perror_plus("setenv");
1829
if(connect_to != NULL){
1830
ret = setenv("CONNECT", connect_to, 1);
1832
perror_plus("setenv");
1836
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
1840
perror_plus("openat");
1841
_exit(EXIT_FAILURE);
1843
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1844
perror_plus("close");
1845
_exit(EXIT_FAILURE);
1847
ret = dup2(devnull, STDIN_FILENO);
1849
perror_plus("dup2(devnull, STDIN_FILENO)");
1852
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
1854
perror_plus("close");
1857
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1859
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1862
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1864
perror_plus("fexecve");
1865
_exit(EXIT_FAILURE);
1869
perror_plus("fork");
1874
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1875
perror_plus("waitpid");
1879
if(WIFEXITED(status)){
1880
if(WEXITSTATUS(status) != 0){
1881
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1882
" with status %d\n", direntry->d_name,
1883
WEXITSTATUS(status));
1887
} else if(WIFSIGNALED(status)){
1888
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1889
" signal %d\n", direntry->d_name,
1894
fprintf_plus(stderr, "Warning: network hook \"%s\""
1895
" crashed\n", direntry->d_name);
1901
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1907
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1908
perror_plus("close");
1915
__attribute__((nonnull, warn_unused_result))
1916
error_t bring_up_interface(const char *const interface,
1918
error_t old_errno = errno;
1920
struct ifreq network;
1921
unsigned int if_index = if_nametoindex(interface);
1923
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1933
if(not interface_is_up(interface)){
1934
error_t ret_errno = 0, ioctl_errno = 0;
1935
if(not get_flags(interface, &network)){
1937
fprintf_plus(stderr, "Failed to get flags for interface "
1938
"\"%s\"\n", interface);
1942
network.ifr_flags |= IFF_UP; /* set flag */
1944
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1947
perror_plus("socket");
1953
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1955
perror_plus("close");
1962
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1966
/* Raise privileges */
1967
ret_errno = raise_privileges();
1970
perror_plus("Failed to raise privileges");
1975
bool restore_loglevel = false;
1977
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1978
messages about the network interface to mess up the prompt */
1979
ret_linux = klogctl(8, NULL, 5);
1980
if(ret_linux == -1){
1981
perror_plus("klogctl");
1983
restore_loglevel = true;
1986
#endif /* __linux__ */
1987
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1988
ioctl_errno = errno;
1990
if(restore_loglevel){
1991
ret_linux = klogctl(7, NULL, 0);
1992
if(ret_linux == -1){
1993
perror_plus("klogctl");
1996
#endif /* __linux__ */
1998
/* If raise_privileges() succeeded above */
2000
/* Lower privileges */
2001
ret_errno = lower_privileges();
2004
perror_plus("Failed to lower privileges");
2008
/* Close the socket */
2009
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2011
perror_plus("close");
2014
if(ret_setflags == -1){
2015
errno = ioctl_errno;
2016
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2021
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2025
/* Sleep checking until interface is running.
2026
Check every 0.25s, up to total time of delay */
2027
for(int i=0; i < delay * 4; i++){
2028
if(interface_is_running(interface)){
2031
struct timespec sleeptime = { .tv_nsec = 250000000 };
2032
ret = nanosleep(&sleeptime, NULL);
2033
if(ret == -1 and errno != EINTR){
2034
perror_plus("nanosleep");
2042
__attribute__((nonnull, warn_unused_result))
2043
error_t take_down_interface(const char *const interface){
2044
error_t old_errno = errno;
2045
struct ifreq network;
2046
unsigned int if_index = if_nametoindex(interface);
2048
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2052
if(interface_is_up(interface)){
2053
error_t ret_errno = 0, ioctl_errno = 0;
2054
if(not get_flags(interface, &network) and debug){
2056
fprintf_plus(stderr, "Failed to get flags for interface "
2057
"\"%s\"\n", interface);
2061
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2063
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2066
perror_plus("socket");
2072
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
2076
/* Raise privileges */
2077
ret_errno = raise_privileges();
2080
perror_plus("Failed to raise privileges");
2083
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2084
ioctl_errno = errno;
2086
/* If raise_privileges() succeeded above */
2088
/* Lower privileges */
2089
ret_errno = lower_privileges();
2092
perror_plus("Failed to lower privileges");
2096
/* Close the socket */
2097
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2099
perror_plus("close");
2102
if(ret_setflags == -1){
2103
errno = ioctl_errno;
2104
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2109
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2117
1275
int main(int argc, char *argv[]){
2118
mandos_context mc = { .server = NULL, .dh_bits = 1024,
2119
.priority = "SECURE256:!CTYPE-X.509:"
2120
"+CTYPE-OPENPGP", .current_server = NULL,
2121
.interfaces = NULL, .interfaces_size = 0 };
2122
1276
AvahiSServiceBrowser *sb = NULL;
2125
1279
intmax_t tmpmax;
2127
1281
int exitcode = EXIT_SUCCESS;
2128
char *interfaces_to_take_down = NULL;
2129
size_t interfaces_to_take_down_size = 0;
2130
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2131
char old_tempdir[] = "/tmp/mandosXXXXXX";
2132
char *tempdir = NULL;
1282
const char *interface = "";
1283
struct ifreq network;
1285
bool take_down_interface = false;
1288
char tempdir[] = "/tmp/mandosXXXXXX";
1289
bool tempdir_created = false;
2133
1290
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2134
1291
const char *seckey = PATHDIR "/" SECKEY;
2135
1292
const char *pubkey = PATHDIR "/" PUBKEY;
2136
char *interfaces_hooks = NULL;
2138
1294
bool gnutls_initialized = false;
2139
1295
bool gpgme_initialized = false;
2317
1462
/* Work around Debian bug #633582:
2318
1463
<http://bugs.debian.org/633582> */
2320
/* Re-raise privileges */
2321
ret_errno = raise_privileges();
2324
perror_plus("Failed to raise privileges");
2328
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2329
int seckey_fd = open(seckey, O_RDONLY);
2330
if(seckey_fd == -1){
2331
perror_plus("open");
2333
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2335
perror_plus("fstat");
2337
if(S_ISREG(st.st_mode)
2338
and st.st_uid == 0 and st.st_gid == 0){
2339
ret = fchown(seckey_fd, uid, gid);
2341
perror_plus("fchown");
2345
TEMP_FAILURE_RETRY(close(seckey_fd));
2349
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2350
int pubkey_fd = open(pubkey, O_RDONLY);
2351
if(pubkey_fd == -1){
2352
perror_plus("open");
2354
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2356
perror_plus("fstat");
2358
if(S_ISREG(st.st_mode)
2359
and st.st_uid == 0 and st.st_gid == 0){
2360
ret = fchown(pubkey_fd, uid, gid);
2362
perror_plus("fchown");
2366
TEMP_FAILURE_RETRY(close(pubkey_fd));
2370
/* Lower privileges */
2371
ret_errno = lower_privileges();
2374
perror_plus("Failed to lower privileges");
2379
/* Remove invalid interface names (except "none") */
2381
char *interface = NULL;
2382
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2384
if(strcmp(interface, "none") != 0
2385
and if_nametoindex(interface) == 0){
2386
if(interface[0] != '\0'){
2387
fprintf_plus(stderr, "Not using nonexisting interface"
2388
" \"%s\"\n", interface);
2390
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2396
/* Run network hooks */
2398
if(mc.interfaces != NULL){
2399
interfaces_hooks = malloc(mc.interfaces_size);
2400
if(interfaces_hooks == NULL){
2401
perror_plus("malloc");
2404
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2405
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2407
run_network_hooks("start", interfaces_hooks != NULL ?
2408
interfaces_hooks : "", delay);
1466
/* Re-raise priviliges */
1470
perror_plus("seteuid");
1473
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1474
int seckey_fd = open(seckey, O_RDONLY);
1475
if(seckey_fd == -1){
1476
perror_plus("open");
1478
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1480
perror_plus("fstat");
1482
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1483
ret = fchown(seckey_fd, uid, gid);
1485
perror_plus("fchown");
1489
TEMP_FAILURE_RETRY(close(seckey_fd));
1493
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1494
int pubkey_fd = open(pubkey, O_RDONLY);
1495
if(pubkey_fd == -1){
1496
perror_plus("open");
1498
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1500
perror_plus("fstat");
1502
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1503
ret = fchown(pubkey_fd, uid, gid);
1505
perror_plus("fchown");
1509
TEMP_FAILURE_RETRY(close(pubkey_fd));
1513
/* Lower privileges */
1517
perror_plus("seteuid");
2412
1522
avahi_set_log_function(empty_log);
1525
if(interface[0] == '\0'){
1526
struct dirent **direntries;
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1530
/* Pick the first good interface */
1531
interface = strdup(direntries[0]->d_name);
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1535
if(interface == NULL){
1536
perror_plus("malloc");
1538
exitcode = EXIT_FAILURE;
1544
fprintf(stderr, "Could not find a network interface\n");
1545
exitcode = EXIT_FAILURE;
2415
1550
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2416
1551
from the signal handler */
2417
1552
/* Initialize the pseudo-RNG for Avahi */
2418
1553
srand((unsigned int) time(NULL));
2419
simple_poll = avahi_simple_poll_new();
2420
if(simple_poll == NULL){
2421
fprintf_plus(stderr,
2422
"Avahi: Failed to create simple poll object.\n");
1554
mc.simple_poll = avahi_simple_poll_new();
1555
if(mc.simple_poll == NULL){
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2423
1557
exitcode = EX_UNAVAILABLE;
2490
/* If no interfaces were specified, make a list */
2491
if(mc.interfaces == NULL){
2492
struct dirent **direntries = NULL;
2493
/* Look for any good interfaces */
2494
ret = scandir(sys_class_net, &direntries, good_interface,
2497
/* Add all found interfaces to interfaces list */
2498
for(int i = 0; i < ret; ++i){
2499
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2500
direntries[i]->d_name);
2503
perror_plus("argz_add");
2504
free(direntries[i]);
2508
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2509
direntries[i]->d_name);
2511
free(direntries[i]);
1624
/* If the interface is down, bring it up */
1625
if(strcmp(interface, "none") != 0){
1626
if_index = (AvahiIfIndex) if_nametoindex(interface);
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1629
exitcode = EX_UNAVAILABLE;
1637
/* Re-raise priviliges */
1641
perror_plus("seteuid");
1645
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1646
messages about the network interface to mess up the prompt */
1647
ret = klogctl(8, NULL, 5);
1648
bool restore_loglevel = true;
1650
restore_loglevel = false;
1651
perror_plus("klogctl");
1653
#endif /* __linux__ */
1655
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1657
perror_plus("socket");
1658
exitcode = EX_OSERR;
1660
if(restore_loglevel){
1661
ret = klogctl(7, NULL, 0);
1663
perror_plus("klogctl");
1666
#endif /* __linux__ */
1667
/* Lower privileges */
1671
perror_plus("seteuid");
1675
strcpy(network.ifr_name, interface);
1676
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1678
perror_plus("ioctl SIOCGIFFLAGS");
1680
if(restore_loglevel){
1681
ret = klogctl(7, NULL, 0);
1683
perror_plus("klogctl");
1686
#endif /* __linux__ */
1687
exitcode = EX_OSERR;
1688
/* Lower privileges */
1692
perror_plus("seteuid");
1696
if((network.ifr_flags & IFF_UP) == 0){
1697
network.ifr_flags |= IFF_UP;
1698
take_down_interface = true;
1699
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1701
take_down_interface = false;
1702
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1703
exitcode = EX_OSERR;
1705
if(restore_loglevel){
1706
ret = klogctl(7, NULL, 0);
1708
perror_plus("klogctl");
1711
#endif /* __linux__ */
1712
/* Lower privileges */
1716
perror_plus("seteuid");
1721
/* Sleep checking until interface is running.
1722
Check every 0.25s, up to total time of delay */
1723
for(int i=0; i < delay * 4; i++){
1724
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1726
perror_plus("ioctl SIOCGIFFLAGS");
1727
} else if(network.ifr_flags & IFF_RUNNING){
1730
struct timespec sleeptime = { .tv_nsec = 250000000 };
1731
ret = nanosleep(&sleeptime, NULL);
1732
if(ret == -1 and errno != EINTR){
1733
perror_plus("nanosleep");
1736
if(not take_down_interface){
1737
/* We won't need the socket anymore */
1738
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1740
perror_plus("close");
1744
if(restore_loglevel){
1745
/* Restores kernel loglevel to default */
1746
ret = klogctl(7, NULL, 0);
1748
perror_plus("klogctl");
1751
#endif /* __linux__ */
1752
/* Lower privileges */
1754
if(take_down_interface){
1755
/* Lower privileges */
1758
perror_plus("seteuid");
2518
fprintf_plus(stderr, "Could not find a network interface\n");
2519
exitcode = EXIT_FAILURE;
2524
/* Bring up interfaces which are down, and remove any "none"s */
2526
char *interface = NULL;
2527
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2529
/* If interface name is "none", stop bringing up interfaces.
2530
Also remove all instances of "none" from the list */
2531
if(strcmp(interface, "none") == 0){
2532
argz_delete(&mc.interfaces, &mc.interfaces_size,
2535
while((interface = argz_next(mc.interfaces,
2536
mc.interfaces_size, interface))){
2537
if(strcmp(interface, "none") == 0){
2538
argz_delete(&mc.interfaces, &mc.interfaces_size,
2545
bool interface_was_up = interface_is_up(interface);
2546
errno = bring_up_interface(interface, delay);
2547
if(not interface_was_up){
2549
perror_plus("Failed to bring up interface");
2551
errno = argz_add(&interfaces_to_take_down,
2552
&interfaces_to_take_down_size,
2555
perror_plus("argz_add");
2560
if(debug and (interfaces_to_take_down == NULL)){
2561
fprintf_plus(stderr, "No interfaces were brought up\n");
2565
/* If we only got one interface, explicitly use only that one */
2566
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2568
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2571
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1761
/* Lower privileges permanently */
1764
perror_plus("setuid");
2578
ret = init_gnutls_global(pubkey, seckey, &mc);
1773
ret = init_gnutls_global(pubkey, seckey);
2580
fprintf_plus(stderr, "init_gnutls_global failed\n");
1775
fprintf(stderr, "init_gnutls_global failed\n");
2581
1776
exitcode = EX_UNAVAILABLE;
2777
1960
if(gpgme_initialized){
2778
1961
gpgme_release(mc.ctx);
2781
1964
/* Cleans up the circular linked list of Mandos servers the client
2783
1966
if(mc.current_server != NULL){
2784
1967
mc.current_server->prev->next = NULL;
2785
1968
while(mc.current_server != NULL){
2786
1969
server *next = mc.current_server->next;
2788
#pragma GCC diagnostic push
2789
#pragma GCC diagnostic ignored "-Wcast-qual"
2791
free((char *)(mc.current_server->ip));
2793
#pragma GCC diagnostic pop
2795
1970
free(mc.current_server);
2796
1971
mc.current_server = next;
2800
/* Re-raise privileges */
2802
ret_errno = raise_privileges();
2805
perror_plus("Failed to raise privileges");
2808
/* Run network hooks */
2809
run_network_hooks("stop", interfaces_hooks != NULL ?
2810
interfaces_hooks : "", delay);
2812
/* Take down the network interfaces which were brought up */
2814
char *interface = NULL;
2815
while((interface=argz_next(interfaces_to_take_down,
2816
interfaces_to_take_down_size,
2818
ret_errno = take_down_interface(interface);
2821
perror_plus("Failed to take down interface");
2824
if(debug and (interfaces_to_take_down == NULL)){
2825
fprintf_plus(stderr, "No interfaces needed to be taken"
1975
/* Take down the network interface */
1976
if(take_down_interface){
1977
/* Re-raise priviliges */
1981
perror_plus("seteuid");
2831
ret_errno = lower_privileges_permanently();
2834
perror_plus("Failed to lower privileges permanently");
1984
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1986
perror_plus("ioctl SIOCGIFFLAGS");
1987
} else if(network.ifr_flags & IFF_UP) {
1988
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1989
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1991
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1994
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1996
perror_plus("close");
1998
/* Lower privileges permanently */
2002
perror_plus("setuid");
2838
free(interfaces_to_take_down);
2839
free(interfaces_hooks);
2841
2007
/* Removes the GPGME temp directory and all files inside */
2842
if(tempdir != NULL){
2008
if(tempdir_created){
2843
2009
struct dirent **direntries = NULL;
2844
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
2848
if(tempdir_fd == -1){
2849
perror_plus("open");
2852
#if __GLIBC_PREREQ(2, 15)
2853
int numentries = scandirat(tempdir_fd, ".", &direntries,
2854
notdotentries, alphasort);
2855
#else /* not __GLIBC_PREREQ(2, 15) */
2856
int numentries = scandir(tempdir, &direntries, notdotentries,
2858
#endif /* not __GLIBC_PREREQ(2, 15) */
2859
#else /* not __GLIBC__ */
2860
int numentries = scandir(tempdir, &direntries, notdotentries,
2862
#endif /* not __GLIBC__ */
2863
if(numentries >= 0){
2864
for(int i = 0; i < numentries; i++){
2865
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2867
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2868
" \"%s\", 0): %s\n", tempdir,
2869
direntries[i]->d_name, strerror(errno));
2871
free(direntries[i]);
2874
/* need to clean even if 0 because man page doesn't specify */
2876
if(numentries == -1){
2877
perror_plus("scandir");
2879
ret = rmdir(tempdir);
2880
if(ret == -1 and errno != ENOENT){
2881
perror_plus("rmdir");
2010
struct dirent *direntry = NULL;
2011
int numentries = scandir(tempdir, &direntries, notdotentries,
2013
if (numentries > 0){
2014
for(int i = 0; i < numentries; i++){
2015
direntry = direntries[i];
2016
char *fullname = NULL;
2017
ret = asprintf(&fullname, "%s/%s", tempdir,
2020
perror_plus("asprintf");
2023
ret = remove(fullname);
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2884
TEMP_FAILURE_RETRY(close(tempdir_fd));
2032
/* need to clean even if 0 because man page doesn't specify */
2034
if (numentries == -1){
2035
perror_plus("scandir");
2037
ret = rmdir(tempdir);
2038
if(ret == -1 and errno != ENOENT){
2039
perror_plus("rmdir");