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() */
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
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
#include <grp.h> /* setgroups() */
90
93
#include <sys/klog.h> /* klogctl() */
171
175
perror(print_text);
178
int fprintf_plus(FILE *stream, const char *format, ...){
180
va_start (ap, format);
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
175
188
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
189
* bytes. "buffer_capacity" is how much is currently allocated,
177
190
* "buffer_length" is how much is already used.
179
192
size_t incbuffer(char **buffer, size_t buffer_length,
180
size_t buffer_capacity){
193
size_t buffer_capacity){
181
194
if(buffer_length + BUFFER_SIZE > buffer_capacity){
182
195
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
196
if(buffer == NULL){
252
264
rc = gpgme_data_new_from_fd(&pgp_data, fd);
253
265
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));
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
259
271
rc = gpgme_op_import(mc.ctx, pgp_data);
260
272
if(rc != GPG_ERR_NO_ERROR){
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
275
fprintf(stderr, "Initializing GPGME\n");
287
fprintf_plus(stderr, "Initializing GPGME\n");
279
291
gpgme_check_version(NULL);
280
292
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
281
293
if(rc != GPG_ERR_NO_ERROR){
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
287
299
/* Set GPGME home directory for the OpenPGP engine only */
288
300
rc = gpgme_get_engine_info(&engine_info);
289
301
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
294
306
while(engine_info != NULL){
300
312
engine_info = engine_info->next;
302
314
if(engine_info == NULL){
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
307
320
/* Create new GPGME "context" */
308
321
rc = gpgme_new(&(mc.ctx));
309
322
if(rc != GPG_ERR_NO_ERROR){
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
333
347
ssize_t plaintext_length = 0;
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
339
353
/* Create new GPGME data buffer from memory cryptotext */
340
354
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
342
356
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));
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
348
362
/* Create new empty GPGME data buffer for the plaintext */
349
363
rc = gpgme_data_new(&dh_plain);
350
364
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
353
368
gpgme_data_release(dh_crypto);
359
374
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
360
375
if(rc != GPG_ERR_NO_ERROR){
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
363
378
plaintext_length = -1;
365
380
gpgme_decrypt_result_t result;
366
381
result = gpgme_op_decrypt_result(mc.ctx);
367
382
if(result == NULL){
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
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);
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
374
389
if(result->file_name != NULL){
375
fprintf(stderr, "File name: %s\n", result->file_name);
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
377
392
gpgme_recipient_t recipient;
378
393
recipient = result->recipients;
379
394
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
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
386
402
recipient = recipient->next;
404
420
*plaintext = NULL;
406
422
plaintext_capacity = incbuffer(plaintext,
407
(size_t)plaintext_length,
423
(size_t)plaintext_length,
409
425
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
411
plaintext_length = -1;
426
perror_plus("incbuffer");
427
plaintext_length = -1;
415
431
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
467
fprintf(stderr, "Initializing GnuTLS\n");
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
470
486
ret = gnutls_global_init();
471
487
if(ret != GNUTLS_E_SUCCESS){
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
485
501
/* OpenPGP credentials */
486
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
487
503
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
490
506
gnutls_global_deinit();
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
500
517
ret = gnutls_certificate_set_openpgp_key_file
501
518
(mc.cred, pubkeyfilename, seckeyfilename,
502
519
GNUTLS_OPENPGP_FMT_BASE64);
503
520
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));
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
512
529
/* GnuTLS server initialization */
513
530
ret = gnutls_dh_params_init(&mc.dh_params);
514
531
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
519
537
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
538
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
560
579
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
561
580
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));
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
565
584
gnutls_deinit(*session);
710
729
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
730
perror_plus("if_indextoname");
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
720
739
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
721
740
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
873
892
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
876
896
gnutls_perror(ret);
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
884
904
gnutls_bye(session, GNUTLS_SHUT_RDWR);
993
1012
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)));
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1016
avahi_strerror(avahi_server_errno(mc.server)));
999
1019
case AVAHI_RESOLVER_FOUND:
1001
1021
char ip[AVAHI_ADDRESS_STR_MAX];
1002
1022
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);
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
1008
1028
int ret = start_mandos_communication(ip, port, interface,
1009
1029
avahi_proto_to_af(proto));
1055
1075
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
1076
name, type, domain, protocol, 0,
1057
1077
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1080
avahi_strerror(avahi_server_errno(mc.server)));
1062
1083
case AVAHI_BROWSER_REMOVE:
1110
1132
/* Reject the loopback device */
1111
1133
if(ifr->ifr_flags & IFF_LOOPBACK){
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1118
1140
/* Accept point-to-point devices only if connect_to is specified */
1119
1141
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1126
1148
/* Otherwise, reject non-broadcast-capable devices */
1127
1149
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1134
1156
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
1157
if(ifr->ifr_flags & IFF_NOARP){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1142
1165
/* Accept this device */
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1174
1200
* (This function is passed to scandir(3) as a filter function.)
1176
1202
int up_interface(const struct dirent *if_entry){
1178
char *flagname = NULL;
1179
1203
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",
1208
if(not get_flags(if_entry->d_name, &ifr)){
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1245
1216
/* 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",
1217
if(not (ifr.ifr_flags & IFF_UP)){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1225
/* Reject non-running interfaces */
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1234
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);
1262
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1263
"abcdefghijklmnopqrstuvwxyz"
1266
if((direntry->d_name)[sret] != '\0'){
1267
/* Contains non-allowed characters */
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1275
char *fullname = NULL;
1276
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1278
perror_plus("asprintf");
1282
ret = stat(fullname, &st);
1322
perror_plus("Could not stat plugin");
1285
perror_plus("Could not stat hook");
1326
if(not (st.st_mode & S_ISREG)){
1289
if(not (S_ISREG(st.st_mode))){
1327
1290
/* Not a regular file */
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1330
1297
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1331
1298
/* Not executable */
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1344
1319
if(mc.current_server == NULL){
1347
"Wait until first server is found. No timeout!\n");
1321
fprintf_plus(stderr, "Wait until first server is found."
1349
1324
ret = avahi_simple_poll_iterate(s, -1);
1352
fprintf(stderr, "Check current_server if we should run it,"
1327
fprintf_plus(stderr, "Check current_server if we should run"
1355
1330
/* the current time */
1356
1331
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1398
1374
ret = avahi_simple_poll_iterate(s, (int)block_time);
1401
if (ret > 0 or errno != EINTR) {
1377
if (ret > 0 or errno != EINTR){
1402
1378
return (ret != 1) ? ret : 0;
1384
bool run_network_hooks(const char *mode, const char *interface,
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1392
perror_plus("scandir");
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1400
perror_plus("asprintf");
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1407
pid_t hook_pid = fork();
1410
/* Raise privileges */
1414
perror_plus("seteuid");
1416
/* Raise privileges even more */
1420
perror_plus("setuid");
1426
perror_plus("setgid");
1428
/* Reset supplementary groups */
1430
ret = setgroups(0, NULL);
1432
perror_plus("setgroups");
1434
dup2(devnull, STDIN_FILENO);
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1439
perror_plus("setenv");
1442
ret = setenv("DEVICE", interface, 1);
1444
perror_plus("setenv");
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1449
perror_plus("setenv");
1452
ret = setenv("MODE", mode, 1);
1454
perror_plus("setenv");
1458
ret = asprintf(&delaystring, "%f", delay);
1460
perror_plus("asprintf");
1463
ret = setenv("DELAY", delaystring, 1);
1466
perror_plus("setenv");
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1475
perror_plus("waitpid");
1479
if(WIFEXITED(status)){
1480
if(WEXITSTATUS(status) != 0){
1481
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1482
" with status %d\n", direntry->d_name,
1483
WEXITSTATUS(status));
1487
} else if(WIFSIGNALED(status)){
1488
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1489
" signal %d\n", direntry->d_name,
1494
fprintf_plus(stderr, "Warning: network hook \"%s\""
1495
" crashed\n", direntry->d_name);
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1408
1511
int main(int argc, char *argv[]){
1409
1512
AvahiSServiceBrowser *sb = NULL;
1561
1671
argp_state_help(state, state->out_stream,
1562
1672
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1563
1673
case 'V': /* --version */
1564
fprintf(state->out_stream, "%s\n", argp_program_version);
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1565
1677
exit(argp_err_exit_status);
1595
1707
/* Work around Debian bug #633582:
1596
1708
<http://bugs.debian.org/633582> */
1599
1710
/* Re-raise priviliges */
1601
1712
ret = seteuid(0);
1603
1714
perror_plus("seteuid");
1606
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1607
int seckey_fd = open(seckey, O_RDONLY);
1608
if(seckey_fd == -1){
1609
perror_plus("open");
1611
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1613
perror_plus("fstat");
1615
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1616
ret = fchown(seckey_fd, uid, gid);
1618
perror_plus("fchown");
1622
TEMP_FAILURE_RETRY(close(seckey_fd));
1626
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1627
int pubkey_fd = open(pubkey, O_RDONLY);
1628
if(pubkey_fd == -1){
1629
perror_plus("open");
1631
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1633
perror_plus("fstat");
1635
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1636
ret = fchown(pubkey_fd, uid, gid);
1638
perror_plus("fchown");
1642
TEMP_FAILURE_RETRY(close(pubkey_fd));
1646
/* Lower privileges */
1650
perror_plus("seteuid");
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1725
perror_plus("fstat");
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1731
perror_plus("fchown");
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1746
perror_plus("fstat");
1748
if(S_ISREG(st.st_mode)
1749
and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1752
perror_plus("fchown");
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1760
/* Lower privileges */
1764
perror_plus("seteuid");
1654
/* Find network hooks and run them */
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");
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1695
1778
if(interface[0] == '\0'){
1696
1779
struct dirent **direntries;
1697
ret = scandir(sys_class_net, &direntries, good_interface,
1780
/* First look for interfaces that are up */
1781
ret = scandir(sys_class_net, &direntries, up_interface,
1784
/* No up interfaces, look for any good interfaces */
1786
ret = scandir(sys_class_net, &direntries, good_interface,
1700
/* Pick the first good interface */
1790
/* Pick the first interface returned */
1701
1791
interface = strdup(direntries[0]->d_name);
1703
fprintf(stderr, "Using interface \"%s\"\n", interface);
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1705
1795
if(interface == NULL){
1706
1796
perror_plus("malloc");
2082
2165
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2083
2166
NULL, 0, browse_callback, NULL);
2084
2167
if(sb == NULL){
2085
fprintf(stderr, "Failed to create service browser: %s\n",
2086
avahi_strerror(avahi_server_errno(mc.server)));
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2169
avahi_strerror(avahi_server_errno(mc.server)));
2087
2170
exitcode = EX_UNAVAILABLE;
2095
2178
/* Run the main loop */
2098
fprintf(stderr, "Starting Avahi loop search\n");
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
2101
2184
ret = avahi_loop_with_timeout(mc.simple_poll,
2102
2185
(int)(retry_interval * 1000));
2104
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2105
(ret == 0) ? "successfully" : "with error");
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2111
fprintf(stderr, "%s exiting\n", argv[0]);
2194
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2114
2197
/* Cleanup things */
2145
/* XXX run network hooks "stop" here */
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2147
/* Take down the network interface */
2148
if(take_down_interface){
2149
/* Re-raise priviliges */
2231
/* Re-raise priviliges */
2151
2234
ret = seteuid(0);
2153
2236
perror_plus("seteuid");
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
2156
2241
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2158
2243
perror_plus("ioctl SIOCGIFFLAGS");
2159
} else if(network.ifr_flags & IFF_UP) {
2244
} else if(network.ifr_flags & IFF_UP){
2160
2245
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2161
2246
ret = ioctl(sd, SIOCSIFFLAGS, &network);