53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
56
#include <sys/stat.h> /* open() */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
92
#include <sys/klog.h> /* klogctl() */
171
174
perror(print_text);
177
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_start (ap, format);
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
175
187
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
188
* bytes. "buffer_capacity" is how much is currently allocated,
177
189
* "buffer_length" is how much is already used.
179
191
size_t incbuffer(char **buffer, size_t buffer_length,
180
size_t buffer_capacity){
192
size_t buffer_capacity){
181
193
if(buffer_length + BUFFER_SIZE > buffer_capacity){
182
194
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
195
if(buffer == NULL){
252
263
rc = gpgme_data_new_from_fd(&pgp_data, fd);
253
264
if(rc != GPG_ERR_NO_ERROR){
254
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
255
gpgme_strsource(rc), gpgme_strerror(rc));
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
259
270
rc = gpgme_op_import(mc.ctx, pgp_data);
260
271
if(rc != GPG_ERR_NO_ERROR){
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
275
fprintf(stderr, "Initializing GPGME\n");
286
fprintf_plus(stderr, "Initializing GPGME\n");
279
290
gpgme_check_version(NULL);
280
291
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
281
292
if(rc != GPG_ERR_NO_ERROR){
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
287
298
/* Set GPGME home directory for the OpenPGP engine only */
288
299
rc = gpgme_get_engine_info(&engine_info);
289
300
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
294
305
while(engine_info != NULL){
300
311
engine_info = engine_info->next;
302
313
if(engine_info == NULL){
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
307
319
/* Create new GPGME "context" */
308
320
rc = gpgme_new(&(mc.ctx));
309
321
if(rc != GPG_ERR_NO_ERROR){
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
333
346
ssize_t plaintext_length = 0;
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
339
352
/* Create new GPGME data buffer from memory cryptotext */
340
353
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
342
355
if(rc != GPG_ERR_NO_ERROR){
343
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
344
gpgme_strsource(rc), gpgme_strerror(rc));
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
348
361
/* Create new empty GPGME data buffer for the plaintext */
349
362
rc = gpgme_data_new(&dh_plain);
350
363
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
353
367
gpgme_data_release(dh_crypto);
359
373
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
360
374
if(rc != GPG_ERR_NO_ERROR){
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
363
377
plaintext_length = -1;
365
379
gpgme_decrypt_result_t result;
366
380
result = gpgme_op_decrypt_result(mc.ctx);
367
381
if(result == NULL){
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
370
fprintf(stderr, "Unsupported algorithm: %s\n",
371
result->unsupported_algorithm);
372
fprintf(stderr, "Wrong key usage: %u\n",
373
result->wrong_key_usage);
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
374
388
if(result->file_name != NULL){
375
fprintf(stderr, "File name: %s\n", result->file_name);
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
377
391
gpgme_recipient_t recipient;
378
392
recipient = result->recipients;
379
393
while(recipient != NULL){
380
fprintf(stderr, "Public key algorithm: %s\n",
381
gpgme_pubkey_algo_name(recipient->pubkey_algo));
382
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
383
fprintf(stderr, "Secret key available: %s\n",
384
recipient->status == GPG_ERR_NO_SECKEY
394
fprintf_plus(stderr, "Public key algorithm: %s\n",
395
gpgme_pubkey_algo_name
396
(recipient->pubkey_algo));
397
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
398
fprintf_plus(stderr, "Secret key available: %s\n",
399
recipient->status == GPG_ERR_NO_SECKEY
386
401
recipient = recipient->next;
404
419
*plaintext = NULL;
406
421
plaintext_capacity = incbuffer(plaintext,
407
(size_t)plaintext_length,
422
(size_t)plaintext_length,
409
424
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
411
plaintext_length = -1;
425
perror_plus("incbuffer");
426
plaintext_length = -1;
415
430
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
456
471
/* GnuTLS log function callback */
457
472
static void debuggnutls(__attribute__((unused)) int level,
458
473
const char* string){
459
fprintf(stderr, "GnuTLS: %s", string);
474
fprintf_plus(stderr, "GnuTLS: %s", string);
462
477
static int init_gnutls_global(const char *pubkeyfilename,
467
fprintf(stderr, "Initializing GnuTLS\n");
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
470
485
ret = gnutls_global_init();
471
486
if(ret != GNUTLS_E_SUCCESS){
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
485
500
/* OpenPGP credentials */
486
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
487
502
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
490
505
gnutls_global_deinit();
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
500
516
ret = gnutls_certificate_set_openpgp_key_file
501
517
(mc.cred, pubkeyfilename, seckeyfilename,
502
518
GNUTLS_OPENPGP_FMT_BASE64);
503
519
if(ret != GNUTLS_E_SUCCESS){
505
"Error[%d] while reading the OpenPGP key pair ('%s',"
506
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
507
fprintf(stderr, "The GnuTLS error is: %s\n",
508
safer_gnutls_strerror(ret));
521
"Error[%d] while reading the OpenPGP key pair ('%s',"
522
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
523
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
524
safer_gnutls_strerror(ret));
512
528
/* GnuTLS server initialization */
513
529
ret = gnutls_dh_params_init(&mc.dh_params);
514
530
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
519
536
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
537
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
560
578
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
561
579
if(ret != GNUTLS_E_SUCCESS){
562
fprintf(stderr, "Syntax error at: %s\n", err);
563
fprintf(stderr, "GnuTLS error: %s\n",
564
safer_gnutls_strerror(ret));
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
565
583
gnutls_deinit(*session);
577
595
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
578
596
if(ret != GNUTLS_E_SUCCESS){
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
581
599
gnutls_deinit(*session);
684
702
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
685
703
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
687
705
if(if_index == AVAHI_IF_UNSPEC){
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
710
728
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
729
perror_plus("if_indextoname");
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
720
738
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
721
739
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
873
891
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
876
895
gnutls_perror(ret);
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
884
903
gnutls_bye(session, GNUTLS_SHUT_RDWR);
993
1011
case AVAHI_RESOLVER_FAILURE:
994
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
995
" of type '%s' in domain '%s': %s\n", name, type, domain,
996
avahi_strerror(avahi_server_errno(mc.server)));
1012
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1013
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
avahi_strerror(avahi_server_errno(mc.server)));
999
1018
case AVAHI_RESOLVER_FOUND:
1001
1020
char ip[AVAHI_ADDRESS_STR_MAX];
1002
1021
avahi_address_snprint(ip, sizeof(ip), address);
1004
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1005
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1006
ip, (intmax_t)interface, port);
1023
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1025
host_name, ip, (intmax_t)interface, port);
1008
1027
int ret = start_mandos_communication(ip, port, interface,
1009
1028
avahi_proto_to_af(proto));
1042
1061
case AVAHI_BROWSER_FAILURE:
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
1046
1065
avahi_simple_poll_quit(mc.simple_poll);
1055
1074
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
1075
name, type, domain, protocol, 0,
1057
1076
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
avahi_strerror(avahi_server_errno(mc.server)));
1062
1082
case AVAHI_BROWSER_REMOVE:
1110
1131
/* Reject the loopback device */
1111
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1118
1139
/* Accept point-to-point devices only if connect_to is specified */
1119
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1126
1147
/* Otherwise, reject non-broadcast-capable devices */
1127
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1134
1155
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
1156
if(ifr->ifr_flags & IFF_NOARP){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1142
1164
/* Accept this device */
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1174
1199
* (This function is passed to scandir(3) as a filter function.)
1176
1201
int up_interface(const struct dirent *if_entry){
1178
char *flagname = NULL;
1179
1202
if(if_entry->d_name[0] == '.'){
1182
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1185
perror_plus("asprintf");
1188
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1190
perror_plus("open");
1195
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1196
/* read line from flags_fd */
1197
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1198
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1199
flagstring[(size_t)to_read] = '\0';
1200
if(flagstring == NULL){
1201
perror_plus("malloc");
1206
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1209
perror_plus("read");
1223
tmpmax = strtoimax(flagstring, &tmp, 0);
1224
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1225
and not (isspace(*tmp)))
1226
or tmpmax != (ifreq_flags)tmpmax){
1228
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1229
flagstring, if_entry->d_name);
1235
ifreq_flags flags = (ifreq_flags)tmpmax;
1236
/* Reject the loopback device */
1237
if(flags & IFF_LOOPBACK){
1239
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1207
if(not get_flags(if_entry->d_name, &ifr)){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1245
1215
/* Reject down interfaces */
1246
if(not (flags & IFF_UP)){
1250
/* Accept point-to-point devices only if connect_to is specified */
1251
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1253
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1258
/* Otherwise, reject non-broadcast-capable devices */
1259
if(not (flags & IFF_BROADCAST)){
1261
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1266
/* Reject non-ARP interfaces (including dummy interfaces) */
1267
if(flags & IFF_NOARP){
1269
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1274
/* Accept this device */
1276
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1216
if(not (ifr.ifr_flags & IFF_UP)){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if(not good_flags(if_entry->d_name, &ifr)){
1303
/* Save pointer to last character */
1304
char *end = strchr(direntry->d_name, '\0')-1;
1311
if(((direntry->d_name)[0] == '#')
1313
/* Temporary #name# */
1317
/* XXX more rules here */
1319
ret = stat(direntry->d_name, &st);
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
perror_plus("asprintf");
1281
ret = stat(fullname, &st);
1322
perror_plus("Could not stat plugin");
1284
perror_plus("Could not stat hook");
1326
if(not (st.st_mode & S_ISREG)){
1288
if(not (S_ISREG(st.st_mode))){
1327
1289
/* Not a regular file */
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1330
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1331
1297
/* Not executable */
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1344
1318
if(mc.current_server == NULL){
1347
"Wait until first server is found. No timeout!\n");
1320
fprintf_plus(stderr, "Wait until first server is found."
1349
1323
ret = avahi_simple_poll_iterate(s, -1);
1352
fprintf(stderr, "Check current_server if we should run it,"
1326
fprintf_plus(stderr, "Check current_server if we should run"
1355
1329
/* the current time */
1356
1330
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1398
1373
ret = avahi_simple_poll_iterate(s, (int)block_time);
1401
if (ret > 0 or errno != EINTR) {
1376
if (ret > 0 or errno != EINTR){
1402
1377
return (ret != 1) ? ret : 0;
1383
bool run_network_hooks(const char *mode, const char *interface,
1385
struct dirent **direntries;
1386
struct dirent *direntry;
1388
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1391
perror_plus("scandir");
1393
int devnull = open("/dev/null", O_RDONLY);
1394
for(int i = 0; i < numhooks; i++){
1395
direntry = direntries[i];
1396
char *fullname = NULL;
1397
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
perror_plus("asprintf");
1403
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1406
pid_t hook_pid = fork();
1409
dup2(devnull, STDIN_FILENO);
1411
dup2(STDERR_FILENO, STDOUT_FILENO);
1412
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1414
perror_plus("setenv");
1417
ret = setenv("DEVICE", interface, 1);
1419
perror_plus("setenv");
1422
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1424
perror_plus("setenv");
1427
ret = setenv("MODE", mode, 1);
1429
perror_plus("setenv");
1433
ret = asprintf(&delaystring, "%f", delay);
1435
perror_plus("asprintf");
1438
ret = setenv("DELAY", delaystring, 1);
1441
perror_plus("setenv");
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
1449
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1450
perror_plus("waitpid");
1454
if(WIFEXITED(status)){
1455
if(WEXITSTATUS(status) != 0){
1456
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1457
" with status %d\n", direntry->d_name,
1458
WEXITSTATUS(status));
1462
} else if(WIFSIGNALED(status)){
1463
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1464
" signal %d\n", direntry->d_name,
1469
fprintf_plus(stderr, "Warning: network hook \"%s\""
1470
" crashed\n", direntry->d_name);
1477
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1408
1486
int main(int argc, char *argv[]){
1409
1487
AvahiSServiceBrowser *sb = NULL;
1561
1646
argp_state_help(state, state->out_stream,
1562
1647
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1563
1648
case 'V': /* --version */
1564
fprintf(state->out_stream, "%s\n", argp_program_version);
1649
fprintf_plus(state->out_stream,
1650
"Mandos plugin mandos-client: ");
1651
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1565
1652
exit(argp_err_exit_status);
1654
/* Find network hooks and run them */
1743
/* Run network hooks */
1656
struct dirent **direntries;
1657
struct dirent *direntry;
1658
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[0];
1663
char *fullname = NULL;
1664
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
perror_plus("asprintf");
1670
pid_t hook_pid = fork();
1673
dup2(devnull, STDIN_FILENO);
1675
dup2(STDERR_FILENO, STDOUT_FILENO);
1676
setenv("DEVICE", interface, 1);
1677
setenv("VERBOSE", debug ? "1" : "0", 1);
1678
setenv("MODE", "start", 1);
1679
/* setenv( XXX more here */
1680
ret = execl(fullname, direntry->d_name, "start");
1681
perror_plus("execl");
1746
/* Re-raise priviliges */
1750
perror_plus("seteuid");
1753
if(not run_network_hooks("start", interface, delay)){
1757
/* Lower privileges */
1761
perror_plus("seteuid");
1695
1770
if(interface[0] == '\0'){
1696
1771
struct dirent **direntries;
1697
ret = scandir(sys_class_net, &direntries, good_interface,
1772
/* First look for interfaces that are up */
1773
ret = scandir(sys_class_net, &direntries, up_interface,
1776
/* No up interfaces, look for any good interfaces */
1778
ret = scandir(sys_class_net, &direntries, good_interface,
1700
/* Pick the first good interface */
1782
/* Pick the first interface returned */
1701
1783
interface = strdup(direntries[0]->d_name);
1703
fprintf(stderr, "Using interface \"%s\"\n", interface);
1785
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1705
1787
if(interface == NULL){
1706
1788
perror_plus("malloc");
2082
2157
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2083
2158
NULL, 0, browse_callback, NULL);
2084
2159
if(sb == NULL){
2085
fprintf(stderr, "Failed to create service browser: %s\n",
2086
avahi_strerror(avahi_server_errno(mc.server)));
2160
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2161
avahi_strerror(avahi_server_errno(mc.server)));
2087
2162
exitcode = EX_UNAVAILABLE;
2095
2170
/* Run the main loop */
2098
fprintf(stderr, "Starting Avahi loop search\n");
2173
fprintf_plus(stderr, "Starting Avahi loop search\n");
2101
2176
ret = avahi_loop_with_timeout(mc.simple_poll,
2102
2177
(int)(retry_interval * 1000));
2104
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2105
(ret == 0) ? "successfully" : "with error");
2179
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2180
(ret == 0) ? "successfully" : "with error");
2111
fprintf(stderr, "%s exiting\n", argv[0]);
2186
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2114
2189
/* Cleanup things */
2145
/* XXX run network hooks "stop" here */
2147
/* Take down the network interface */
2148
if(take_down_interface){
2149
/* Re-raise priviliges */
2153
perror_plus("seteuid");
2220
/* Re-raise priviliges */
2226
perror_plus("seteuid");
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2233
/* Take down the network interface */
2234
if(take_down_interface and geteuid() == 0){
2156
2235
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2158
2237
perror_plus("ioctl SIOCGIFFLAGS");
2159
} else if(network.ifr_flags & IFF_UP) {
2238
} else if(network.ifr_flags & IFF_UP){
2160
2239
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2161
2240
ret = ioctl(sd, SIOCSIFFLAGS, &network);