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- Committer: Teddy Hogeborn
- Date: 2011-11-29 18:19:31 UTC
- mto: (505.2.13 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111129181931-vctlij1omtu1qbnx
* initramfs-tools-hook: Set DEVICE for network hooks.
- files removed:
- debian/mandos-client.examples
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <assert.h> /* assert() */
64
65
#include <errno.h> /* perror(), errno,
65
66
program_invocation_short_name */
66
67
#include <time.h> /* nanosleep(), time(), sleep() */
87
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
89
WEXITSTATUS(), WTERMSIG() */
89
90
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
94
91
95
92
#ifdef __linux__
96
93
#include <sys/klog.h> /* klogctl() */
138
135
static const char sys_class_net[] = "/sys/class/net";
139
136
char *connect_to = NULL;
140
137
const char *hookdir = HOOKDIR;
141
uid_t uid = 65534;
142
gid_t gid = 65534;
143
138
144
139
/* Doubly linked list that need to be circularly linked when used */
145
140
typedef struct server{
146
141
const char *ip;
147
in_port_t port;
142
uint16_t port;
148
143
AvahiIfIndex if_index;
149
144
int af;
150
145
struct timespec last_seen;
154
149
155
150
/* Used for passing in values through the Avahi callback functions */
156
151
typedef struct {
152
AvahiSimplePoll *simple_poll;
157
153
AvahiServer *server;
158
154
gnutls_certificate_credentials_t cred;
159
155
unsigned int dh_bits;
161
157
const char *priority;
162
158
gpgme_ctx_t ctx;
163
159
server *current_server;
164
char *interfaces;
165
size_t interfaces_size;
166
160
} mandos_context;
167
161
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
162
/* global context so signal handler can reach it*/
163
mandos_context mc = { .simple_poll = NULL, .server = NULL,
164
.dh_bits = 1024, .priority = "SECURE256"
165
":!CTYPE-X.509:+CTYPE-OPENPGP",
166
.current_server = NULL };
170
167
171
168
sig_atomic_t quit_now = 0;
172
169
int signal_received = 0;
173
170
174
171
/* Function to use when printing errors */
175
172
void perror_plus(const char *print_text){
176
int e = errno;
177
173
fprintf(stderr, "Mandos plugin %s: ",
178
174
program_invocation_short_name);
179
errno = e;
180
175
perror(print_text);
181
176
}
182
177
183
__attribute__((format (gnu_printf, 2, 3)))
184
178
int fprintf_plus(FILE *stream, const char *format, ...){
185
179
va_list ap;
186
180
va_start (ap, format);
208
202
}
209
203
210
204
/* Add server to set of servers to retry periodically */
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
int af, server **current_server){
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
213
207
int ret;
214
208
server *new_server = malloc(sizeof(server));
215
209
if(new_server == NULL){
216
210
perror_plus("malloc");
217
return false;
211
return -1;
218
212
}
219
213
*new_server = (server){ .ip = strdup(ip),
220
214
.port = port,
222
216
.af = af };
223
217
if(new_server->ip == NULL){
224
218
perror_plus("strdup");
225
return false;
219
return -1;
226
220
}
227
221
/* Special case of first server */
228
if(*current_server == NULL){
222
if (mc.current_server == NULL){
229
223
new_server->next = new_server;
230
224
new_server->prev = new_server;
231
*current_server = new_server;
225
mc.current_server = new_server;
232
226
/* Place the new server last in the list */
233
227
} else {
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
228
new_server->next = mc.current_server;
229
new_server->prev = mc.current_server->prev;
236
230
new_server->prev->next = new_server;
237
(*current_server)->prev = new_server;
231
mc.current_server->prev = new_server;
238
232
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
233
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
240
234
if(ret == -1){
241
235
perror_plus("clock_gettime");
242
return false;
236
return -1;
243
237
}
244
return true;
238
return 0;
245
239
}
246
240
247
241
/*
248
242
* Initialize GPGME.
249
243
*/
250
244
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
245
const char *tempdir){
252
246
gpgme_error_t rc;
253
247
gpgme_engine_info_t engine_info;
254
248
249
255
250
/*
256
251
* Helper function to insert pub and seckey to the engine keyring.
257
252
*/
273
268
return false;
274
269
}
275
270
276
rc = gpgme_op_import(mc->ctx, pgp_data);
271
rc = gpgme_op_import(mc.ctx, pgp_data);
277
272
if(rc != GPG_ERR_NO_ERROR){
278
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
274
gpgme_strsource(rc), gpgme_strerror(rc));
323
318
}
324
319
325
320
/* Create new GPGME "context" */
326
rc = gpgme_new(&(mc->ctx));
321
rc = gpgme_new(&(mc.ctx));
327
322
if(rc != GPG_ERR_NO_ERROR){
328
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
344
339
*/
345
340
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
341
size_t crypto_size,
347
char **plaintext,
348
mandos_context *mc){
342
char **plaintext){
349
343
gpgme_data_t dh_crypto, dh_plain;
350
344
gpgme_error_t rc;
351
345
ssize_t ret;
377
371
378
372
/* Decrypt data from the cryptotext data buffer to the plaintext
379
373
data buffer */
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
374
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
381
375
if(rc != GPG_ERR_NO_ERROR){
382
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
377
gpgme_strsource(rc), gpgme_strerror(rc));
384
378
plaintext_length = -1;
385
379
if(debug){
386
380
gpgme_decrypt_result_t result;
387
result = gpgme_op_decrypt_result(mc->ctx);
381
result = gpgme_op_decrypt_result(mc.ctx);
388
382
if(result == NULL){
389
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
390
384
} else {
468
462
}
469
463
470
464
static const char * safer_gnutls_strerror(int value){
471
const char *ret = gnutls_strerror(value);
465
const char *ret = gnutls_strerror(value); /* Spurious warning from
466
-Wunreachable-code */
472
467
if(ret == NULL)
473
468
ret = "(unknown)";
474
469
return ret;
481
476
}
482
477
483
478
static int init_gnutls_global(const char *pubkeyfilename,
484
const char *seckeyfilename,
485
mandos_context *mc){
479
const char *seckeyfilename){
486
480
int ret;
487
481
488
482
if(debug){
505
499
}
506
500
507
501
/* OpenPGP credentials */
508
ret = gnutls_certificate_allocate_credentials(&mc->cred);
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
509
503
if(ret != GNUTLS_E_SUCCESS){
510
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
511
505
safer_gnutls_strerror(ret));
521
515
}
522
516
523
517
ret = gnutls_certificate_set_openpgp_key_file
524
(mc->cred, pubkeyfilename, seckeyfilename,
518
(mc.cred, pubkeyfilename, seckeyfilename,
525
519
GNUTLS_OPENPGP_FMT_BASE64);
526
520
if(ret != GNUTLS_E_SUCCESS){
527
521
fprintf_plus(stderr,
533
527
}
534
528
535
529
/* GnuTLS server initialization */
536
ret = gnutls_dh_params_init(&mc->dh_params);
530
ret = gnutls_dh_params_init(&mc.dh_params);
537
531
if(ret != GNUTLS_E_SUCCESS){
538
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
533
" initialization: %s\n",
540
534
safer_gnutls_strerror(ret));
541
535
goto globalfail;
542
536
}
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
537
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
544
538
if(ret != GNUTLS_E_SUCCESS){
545
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
540
safer_gnutls_strerror(ret));
547
541
goto globalfail;
548
542
}
549
543
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
544
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
551
545
552
546
return 0;
553
547
554
548
globalfail:
555
549
556
gnutls_certificate_free_credentials(mc->cred);
550
gnutls_certificate_free_credentials(mc.cred);
557
551
gnutls_global_deinit();
558
gnutls_dh_params_deinit(mc->dh_params);
552
gnutls_dh_params_deinit(mc.dh_params);
559
553
return -1;
560
554
}
561
555
562
static int init_gnutls_session(gnutls_session_t *session,
563
mandos_context *mc){
556
static int init_gnutls_session(gnutls_session_t *session){
564
557
int ret;
565
558
/* GnuTLS session creation */
566
559
do {
578
571
{
579
572
const char *err;
580
573
do {
581
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
574
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
582
575
if(quit_now){
583
576
gnutls_deinit(*session);
584
577
return -1;
595
588
596
589
do {
597
590
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
mc->cred);
591
mc.cred);
599
592
if(quit_now){
600
593
gnutls_deinit(*session);
601
594
return -1;
611
604
/* ignore client certificate if any. */
612
605
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
606
614
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
607
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
615
608
616
609
return 0;
617
610
}
621
614
__attribute__((unused)) const char *txt){}
622
615
623
616
/* Called when a Mandos server is found */
624
static int start_mandos_communication(const char *ip, in_port_t port,
617
static int start_mandos_communication(const char *ip, uint16_t port,
625
618
AvahiIfIndex if_index,
626
int af, mandos_context *mc){
619
int af){
627
620
int ret, tcp_sd = -1;
628
621
ssize_t sret;
629
622
union {
659
652
return -1;
660
653
}
661
654
662
ret = init_gnutls_session(&session, mc);
655
ret = init_gnutls_session(&session);
663
656
if(ret != 0){
664
657
return -1;
665
658
}
666
659
667
660
if(debug){
668
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
669
PRIuMAX "\n", ip, (uintmax_t)port);
662
PRIu16 "\n", ip, port);
670
663
}
671
664
672
665
tcp_sd = socket(pf, SOCK_STREAM, 0);
703
696
goto mandos_end;
704
697
}
705
698
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
699
to.in6.sin6_port = htons(port); /* Spurious warnings from
700
-Wconversion and
701
-Wunreachable-code */
702
707
703
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
704
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
705
-Wunreachable-code*/
733
729
if(if_indextoname((unsigned int)if_index, interface) == NULL){
734
730
perror_plus("if_indextoname");
735
731
} else {
736
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
737
"\n", ip, interface, (uintmax_t)port);
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
738
734
}
739
735
} else {
740
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
741
ip, (uintmax_t)port);
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
742
738
}
743
739
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
740
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
822
818
goto mandos_end;
823
819
}
824
820
825
/* This casting via intptr_t is to eliminate warning about casting
826
an int to a pointer type. This is exactly how the GnuTLS Guile
827
function "set-session-transport-fd!" does it. */
828
gnutls_transport_set_ptr(session,
829
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
821
/* Spurious warning from -Wint-to-pointer-cast */
822
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
830
823
831
824
if(quit_now){
832
825
errno = EINTR;
937
930
if(buffer_length > 0){
938
931
ssize_t decrypted_buffer_size;
939
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
940
&decrypted_buffer, mc);
933
&decrypted_buffer);
941
934
if(decrypted_buffer_size >= 0){
942
935
943
936
written = 0;
1004
997
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
998
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
999
flags,
1007
void* mc){
1008
if(r == NULL){
1009
return;
1010
}
1000
AVAHI_GCC_UNUSED void* userdata){
1001
assert(r);
1011
1002
1012
1003
/* Called whenever a service has been resolved successfully or
1013
1004
timed out */
1022
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
1015
domain,
1025
avahi_strerror(avahi_server_errno
1026
(((mandos_context*)mc)->server)));
1016
avahi_strerror(avahi_server_errno(mc.server)));
1027
1017
break;
1028
1018
1029
1019
case AVAHI_RESOLVER_FOUND:
1035
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1036
1026
host_name, ip, (intmax_t)interface, port);
1037
1027
}
1038
int ret = start_mandos_communication(ip, (in_port_t)port,
1039
interface,
1040
avahi_proto_to_af(proto),
1041
mc);
1028
int ret = start_mandos_communication(ip, port, interface,
1029
avahi_proto_to_af(proto));
1042
1030
if(ret == 0){
1043
avahi_simple_poll_quit(simple_poll);
1031
avahi_simple_poll_quit(mc.simple_poll);
1044
1032
} else {
1045
if(not add_server(ip, (in_port_t)port, interface,
1046
avahi_proto_to_af(proto),
1047
&((mandos_context*)mc)->current_server)){
1048
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1049
" list\n", name);
1050
}
1033
ret = add_server(ip, port, interface,
1034
avahi_proto_to_af(proto));
1051
1035
}
1052
1036
}
1053
1037
}
1063
1047
const char *domain,
1064
1048
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1065
1049
flags,
1066
void* mc){
1067
if(b == NULL){
1068
return;
1069
}
1050
AVAHI_GCC_UNUSED void* userdata){
1051
assert(b);
1070
1052
1071
1053
/* Called whenever a new services becomes available on the LAN or
1072
1054
is removed from the LAN */
1080
1062
case AVAHI_BROWSER_FAILURE:
1081
1063
1082
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1083
avahi_strerror(avahi_server_errno
1084
(((mandos_context*)mc)->server)));
1085
avahi_simple_poll_quit(simple_poll);
1065
avahi_strerror(avahi_server_errno(mc.server)));
1066
avahi_simple_poll_quit(mc.simple_poll);
1086
1067
return;
1087
1068
1088
1069
case AVAHI_BROWSER_NEW:
1091
1072
the callback function is called the Avahi server will free the
1092
1073
resolver for us. */
1093
1074
1094
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1095
interface, protocol, name, type,
1096
domain, protocol, 0,
1097
resolve_callback, mc) == NULL)
1075
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1076
name, type, domain, protocol, 0,
1077
resolve_callback, NULL) == NULL)
1098
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1099
1079
" %s\n", name,
1100
avahi_strerror(avahi_server_errno
1101
(((mandos_context*)mc)->server)));
1080
avahi_strerror(avahi_server_errno(mc.server)));
1102
1081
break;
1103
1082
1104
1083
case AVAHI_BROWSER_REMOVE:
1123
1102
signal_received = sig;
1124
1103
int old_errno = errno;
1125
1104
/* set main loop to exit */
1126
if(simple_poll != NULL){
1127
avahi_simple_poll_quit(simple_poll);
1105
if(mc.simple_poll != NULL){
1106
avahi_simple_poll_quit(mc.simple_poll);
1128
1107
}
1129
1108
errno = old_errno;
1130
1109
}
1131
1110
1132
1111
bool get_flags(const char *ifname, struct ifreq *ifr){
1133
1112
int ret;
1134
error_t ret_errno;
1135
1113
1136
1114
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1137
1115
if(s < 0){
1138
ret_errno = errno;
1139
1116
perror_plus("socket");
1140
errno = ret_errno;
1141
1117
return false;
1142
1118
}
1143
1119
strcpy(ifr->ifr_name, ifname);
1144
1120
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
1121
if(ret == -1){
1146
1122
if(debug){
1147
ret_errno = errno;
1148
1123
perror_plus("ioctl SIOCGIFFLAGS");
1149
errno = ret_errno;
1150
1124
}
1151
1125
return false;
1152
1126
}
1221
1195
}
1222
1196
1223
1197
/*
1224
* This function determines if a network interface is up.
1225
*/
1226
bool interface_is_up(const char *interface){
1227
struct ifreq ifr;
1228
if(not get_flags(interface, &ifr)){
1229
if(debug){
1230
fprintf_plus(stderr, "Failed to get flags for interface "
1231
"\"%s\"\n", interface);
1232
}
1233
return false;
1234
}
1235
1236
return (bool)(ifr.ifr_flags & IFF_UP);
1237
}
1238
1239
/*
1240
* This function determines if a network interface is running
1241
*/
1242
bool interface_is_running(const char *interface){
1243
struct ifreq ifr;
1244
if(not get_flags(interface, &ifr)){
1245
if(debug){
1246
fprintf_plus(stderr, "Failed to get flags for interface "
1247
"\"%s\"\n", interface);
1248
}
1249
return false;
1250
}
1251
1252
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device which is up.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int up_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1204
return 0;
1205
}
1206
1207
struct ifreq ifr;
1208
if(not get_flags(if_entry->d_name, &ifr)){
1209
if(debug){
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1212
}
1213
return 0;
1214
}
1215
1216
/* Reject down interfaces */
1217
if(not (ifr.ifr_flags & IFF_UP)){
1218
if(debug){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1221
}
1222
return 0;
1223
}
1224
1225
/* Reject non-running interfaces */
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1230
}
1231
return 0;
1232
}
1233
1234
if(not good_flags(if_entry->d_name, &ifr)){
1235
return 0;
1236
}
1237
return 1;
1253
1238
}
1254
1239
1255
1240
int notdotentries(const struct dirent *direntry){
1324
1309
return 1;
1325
1310
}
1326
1311
1327
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1328
mandos_context *mc){
1312
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1329
1313
int ret;
1330
1314
struct timespec now;
1331
1315
struct timespec waited_time;
1332
1316
intmax_t block_time;
1333
1317
1334
1318
while(true){
1335
if(mc->current_server == NULL){
1319
if(mc.current_server == NULL){
1336
1320
if (debug){
1337
1321
fprintf_plus(stderr, "Wait until first server is found."
1338
1322
" No timeout!\n");
1352
1336
/* Calculating in ms how long time between now and server
1353
1337
who we visted longest time ago. Now - last seen. */
1354
1338
waited_time.tv_sec = (now.tv_sec
1355
- mc->current_server->last_seen.tv_sec);
1339
- mc.current_server->last_seen.tv_sec);
1356
1340
waited_time.tv_nsec = (now.tv_nsec
1357
- mc->current_server->last_seen.tv_nsec);
1341
- mc.current_server->last_seen.tv_nsec);
1358
1342
/* total time is 10s/10,000ms.
1359
1343
Converting to s from ms by dividing by 1,000,
1360
1344
and ns to ms by dividing by 1,000,000. */
1368
1352
}
1369
1353
1370
1354
if(block_time <= 0){
1371
ret = start_mandos_communication(mc->current_server->ip,
1372
mc->current_server->port,
1373
mc->current_server->if_index,
1374
mc->current_server->af, mc);
1355
ret = start_mandos_communication(mc.current_server->ip,
1356
mc.current_server->port,
1357
mc.current_server->if_index,
1358
mc.current_server->af);
1375
1359
if(ret == 0){
1376
avahi_simple_poll_quit(s);
1360
avahi_simple_poll_quit(mc.simple_poll);
1377
1361
return 0;
1378
1362
}
1379
1363
ret = clock_gettime(CLOCK_MONOTONIC,
1380
&mc->current_server->last_seen);
1364
&mc.current_server->last_seen);
1381
1365
if(ret == -1){
1382
1366
perror_plus("clock_gettime");
1383
1367
return -1;
1384
1368
}
1385
mc->current_server = mc->current_server->next;
1369
mc.current_server = mc.current_server->next;
1386
1370
block_time = 0; /* Call avahi to find new Mandos
1387
1371
servers, but don't block */
1388
1372
}
1397
1381
}
1398
1382
}
1399
1383
1400
/* Set effective uid to 0, return errno */
1401
error_t raise_privileges(void){
1402
error_t old_errno = errno;
1403
error_t ret_errno = 0;
1404
if(seteuid(0) == -1){
1405
ret_errno = errno;
1406
perror_plus("seteuid");
1407
}
1408
errno = old_errno;
1409
return ret_errno;
1410
}
1411
1412
/* Set effective and real user ID to 0. Return errno. */
1413
error_t raise_privileges_permanently(void){
1414
error_t old_errno = errno;
1415
error_t ret_errno = raise_privileges();
1416
if(ret_errno != 0){
1417
errno = old_errno;
1418
return ret_errno;
1419
}
1420
if(setuid(0) == -1){
1421
ret_errno = errno;
1422
perror_plus("seteuid");
1423
}
1424
errno = old_errno;
1425
return ret_errno;
1426
}
1427
1428
/* Set effective user ID to unprivileged saved user ID */
1429
error_t lower_privileges(void){
1430
error_t old_errno = errno;
1431
error_t ret_errno = 0;
1432
if(seteuid(uid) == -1){
1433
ret_errno = errno;
1434
perror_plus("seteuid");
1435
}
1436
errno = old_errno;
1437
return ret_errno;
1438
}
1439
1440
/* Lower privileges permanently */
1441
error_t lower_privileges_permanently(void){
1442
error_t old_errno = errno;
1443
error_t ret_errno = 0;
1444
if(setuid(uid) == -1){
1445
ret_errno = errno;
1446
perror_plus("setuid");
1447
}
1448
errno = old_errno;
1449
return ret_errno;
1450
}
1451
1452
1384
bool run_network_hooks(const char *mode, const char *interface,
1453
1385
const float delay){
1454
1386
struct dirent **direntries;
1457
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1458
1390
alphasort);
1459
1391
if(numhooks == -1){
1460
if(errno == ENOENT){
1461
if(debug){
1462
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1463
" found\n", hookdir);
1464
}
1465
} else {
1466
perror_plus("scandir");
1467
}
1392
perror_plus("scandir");
1468
1393
} else {
1469
1394
int devnull = open("/dev/null", O_RDONLY);
1470
1395
for(int i = 0; i < numhooks; i++){
1483
1408
if(hook_pid == 0){
1484
1409
/* Child */
1485
1410
/* Raise privileges */
1486
raise_privileges_permanently();
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1487
1422
/* Set group */
1488
1423
errno = 0;
1489
1424
ret = setgid(0);
1509
1444
perror_plus("setenv");
1510
1445
_exit(EX_OSERR);
1511
1446
}
1512
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1513
1448
if(ret == -1){
1514
1449
perror_plus("setenv");
1515
1450
_exit(EX_OSERR);
1532
1467
_exit(EX_OSERR);
1533
1468
}
1534
1469
free(delaystring);
1535
if(connect_to != NULL){
1536
ret = setenv("CONNECT", connect_to, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
}
1542
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1543
perror_plus("execl");
1544
_exit(EXIT_FAILURE);
1545
}
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1546
1472
} else {
1547
1473
int status;
1548
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1582
1508
return true;
1583
1509
}
1584
1510
1585
error_t bring_up_interface(const char *const interface,
1586
const float delay){
1587
int sd = -1;
1588
error_t old_errno = errno;
1589
error_t ret_errno = 0;
1590
int ret, ret_setflags;
1591
struct ifreq network;
1592
unsigned int if_index = if_nametoindex(interface);
1593
if(if_index == 0){
1594
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1595
errno = old_errno;
1596
return ENXIO;
1597
}
1598
1599
if(quit_now){
1600
errno = old_errno;
1601
return EINTR;
1602
}
1603
1604
if(not interface_is_up(interface)){
1605
if(not get_flags(interface, &network) and debug){
1606
ret_errno = errno;
1607
fprintf_plus(stderr, "Failed to get flags for interface "
1608
"\"%s\"\n", interface);
1609
return ret_errno;
1610
}
1611
network.ifr_flags |= IFF_UP;
1612
1613
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1614
if(sd < 0){
1615
ret_errno = errno;
1616
perror_plus("socket");
1617
errno = old_errno;
1618
return ret_errno;
1619
}
1620
1621
if(quit_now){
1622
close(sd);
1623
errno = old_errno;
1624
return EINTR;
1625
}
1626
1627
if(debug){
1628
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1629
interface);
1630
}
1631
1632
/* Raise priviliges */
1633
raise_privileges();
1634
1635
#ifdef __linux__
1636
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1637
messages about the network interface to mess up the prompt */
1638
int ret_linux = klogctl(8, NULL, 5);
1639
bool restore_loglevel = true;
1640
if(ret_linux == -1){
1641
restore_loglevel = false;
1642
perror_plus("klogctl");
1643
}
1644
#endif /* __linux__ */
1645
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1646
ret_errno = errno;
1647
#ifdef __linux__
1648
if(restore_loglevel){
1649
ret_linux = klogctl(7, NULL, 0);
1650
if(ret_linux == -1){
1651
perror_plus("klogctl");
1652
}
1653
}
1654
#endif /* __linux__ */
1655
1656
/* Lower privileges */
1657
lower_privileges();
1658
1659
/* Close the socket */
1660
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1661
if(ret == -1){
1662
perror_plus("close");
1663
}
1664
1665
if(ret_setflags == -1){
1666
errno = ret_errno;
1667
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1668
errno = old_errno;
1669
return ret_errno;
1670
}
1671
} else if(debug){
1672
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1673
interface);
1674
}
1675
1676
/* Sleep checking until interface is running.
1677
Check every 0.25s, up to total time of delay */
1678
for(int i=0; i < delay * 4; i++){
1679
if(interface_is_running(interface)){
1680
break;
1681
}
1682
struct timespec sleeptime = { .tv_nsec = 250000000 };
1683
ret = nanosleep(&sleeptime, NULL);
1684
if(ret == -1 and errno != EINTR){
1685
perror_plus("nanosleep");
1686
}
1687
}
1688
1689
errno = old_errno;
1690
return 0;
1691
}
1692
1693
error_t take_down_interface(const char *const interface){
1694
int sd = -1;
1695
error_t old_errno = errno;
1696
error_t ret_errno = 0;
1697
int ret, ret_setflags;
1698
struct ifreq network;
1699
unsigned int if_index = if_nametoindex(interface);
1700
if(if_index == 0){
1701
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1702
errno = old_errno;
1703
return ENXIO;
1704
}
1705
if(interface_is_up(interface)){
1706
if(not get_flags(interface, &network) and debug){
1707
ret_errno = errno;
1708
fprintf_plus(stderr, "Failed to get flags for interface "
1709
"\"%s\"\n", interface);
1710
return ret_errno;
1711
}
1712
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1713
1714
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1715
if(sd < 0){
1716
ret_errno = errno;
1717
perror_plus("socket");
1718
errno = old_errno;
1719
return ret_errno;
1720
}
1721
1722
if(debug){
1723
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1724
interface);
1725
}
1726
1727
/* Raise priviliges */
1728
raise_privileges();
1729
1730
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1731
ret_errno = errno;
1732
1733
/* Lower privileges */
1734
lower_privileges();
1735
1736
/* Close the socket */
1737
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1738
if(ret == -1){
1739
perror_plus("close");
1740
}
1741
1742
if(ret_setflags == -1){
1743
errno = ret_errno;
1744
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1745
errno = old_errno;
1746
return ret_errno;
1747
}
1748
} else if(debug){
1749
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1750
interface);
1751
}
1752
1753
errno = old_errno;
1754
return 0;
1755
}
1756
1757
1511
int main(int argc, char *argv[]){
1758
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1759
.priority = "SECURE256:!CTYPE-X.509:"
1760
"+CTYPE-OPENPGP", .current_server = NULL,
1761
.interfaces = NULL, .interfaces_size = 0 };
1762
1512
AvahiSServiceBrowser *sb = NULL;
1763
error_t ret_errno;
1513
int error;
1764
1514
int ret;
1765
1515
intmax_t tmpmax;
1766
1516
char *tmp;
1767
1517
int exitcode = EXIT_SUCCESS;
1768
char *interfaces_to_take_down = NULL;
1769
size_t interfaces_to_take_down_size = 0;
1518
const char *interface = "";
1519
struct ifreq network;
1520
int sd = -1;
1521
bool take_down_interface = false;
1522
uid_t uid;
1523
gid_t gid;
1770
1524
char tempdir[] = "/tmp/mandosXXXXXX";
1771
1525
bool tempdir_created = false;
1772
1526
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1773
1527
const char *seckey = PATHDIR "/" SECKEY;
1774
1528
const char *pubkey = PATHDIR "/" PUBKEY;
1775
char *interfaces_hooks = NULL;
1776
size_t interfaces_hooks_size = 0;
1777
1529
1778
1530
bool gnutls_initialized = false;
1779
1531
bool gpgme_initialized = false;
1841
1593
.group = 2 },
1842
1594
{ .name = "retry", .key = 132,
1843
1595
.arg = "SECONDS",
1844
.doc = "Retry interval used when denied by the Mandos server",
1596
.doc = "Retry interval used when denied by the mandos server",
1845
1597
.group = 2 },
1846
1598
{ .name = "network-hook-dir", .key = 133,
1847
1599
.arg = "DIR",
1870
1622
connect_to = arg;
1871
1623
break;
1872
1624
case 'i': /* --interface */
1873
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1874
arg, (int)',');
1875
if(ret_errno != 0){
1876
argp_error(state, "%s", strerror(ret_errno));
1877
}
1625
interface = arg;
1878
1626
break;
1879
1627
case 's': /* --seckey */
1880
1628
seckey = arg;
1923
1671
argp_state_help(state, state->out_stream,
1924
1672
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1925
1673
case 'V': /* --version */
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1926
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1927
1677
exit(argp_err_exit_status);
1928
1678
break;
1958
1708
<http://bugs.debian.org/633582> */
1959
1709
1960
1710
/* Re-raise priviliges */
1961
if(raise_privileges() == 0){
1711
errno = 0;
1712
ret = seteuid(0);
1713
if(ret == -1){
1714
perror_plus("seteuid");
1715
} else {
1962
1716
struct stat st;
1963
1717
1964
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2012
1766
}
2013
1767
}
2014
1768
2015
/* Remove empty interface names */
2016
{
2017
char *interface = NULL;
2018
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2019
interface))){
2020
if(if_nametoindex(interface) == 0){
2021
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2022
fprintf_plus(stderr, "Not using nonexisting interface"
2023
" \"%s\"\n", interface);
2024
}
2025
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2026
interface = NULL;
2027
}
2028
}
2029
}
2030
2031
1769
/* Run network hooks */
2032
{
2033
2034
if(mc.interfaces != NULL){
2035
interfaces_hooks = malloc(mc.interfaces_size);
2036
if(interfaces_hooks == NULL){
2037
perror_plus("malloc");
2038
goto end;
2039
}
2040
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2041
interfaces_hooks_size = mc.interfaces_size;
2042
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2043
(int)',');
2044
}
2045
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2046
interfaces_hooks : "", delay)){
2047
goto end;
2048
}
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
2049
1772
}
2050
1773
2051
1774
if(not debug){
2052
1775
avahi_set_log_function(empty_log);
2053
1776
}
2054
1777
1778
if(interface[0] == '\0'){
1779
struct dirent **direntries;
1780
/* First look for interfaces that are up */
1781
ret = scandir(sys_class_net, &direntries, up_interface,
1782
alphasort);
1783
if(ret == 0){
1784
/* No up interfaces, look for any good interfaces */
1785
free(direntries);
1786
ret = scandir(sys_class_net, &direntries, good_interface,
1787
alphasort);
1788
}
1789
if(ret >= 1){
1790
/* Pick the first interface returned */
1791
interface = strdup(direntries[0]->d_name);
1792
if(debug){
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1794
}
1795
if(interface == NULL){
1796
perror_plus("malloc");
1797
free(direntries);
1798
exitcode = EXIT_FAILURE;
1799
goto end;
1800
}
1801
free(direntries);
1802
} else {
1803
free(direntries);
1804
fprintf_plus(stderr, "Could not find a network interface\n");
1805
exitcode = EXIT_FAILURE;
1806
goto end;
1807
}
1808
}
1809
2055
1810
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2056
1811
from the signal handler */
2057
1812
/* Initialize the pseudo-RNG for Avahi */
2058
1813
srand((unsigned int) time(NULL));
2059
simple_poll = avahi_simple_poll_new();
2060
if(simple_poll == NULL){
1814
mc.simple_poll = avahi_simple_poll_new();
1815
if(mc.simple_poll == NULL){
2061
1816
fprintf_plus(stderr,
2062
1817
"Avahi: Failed to create simple poll object.\n");
2063
1818
exitcode = EX_UNAVAILABLE;
2127
1882
}
2128
1883
}
2129
1884
2130
/* If no interfaces were specified, make a list */
2131
if(mc.interfaces == NULL){
2132
struct dirent **direntries;
2133
/* Look for any good interfaces */
2134
ret = scandir(sys_class_net, &direntries, good_interface,
2135
alphasort);
2136
if(ret >= 1){
2137
/* Add all found interfaces to interfaces list */
2138
for(int i = 0; i < ret; ++i){
2139
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2140
direntries[i]->d_name);
2141
if(ret_errno != 0){
2142
perror_plus("argz_add");
2143
continue;
2144
}
2145
if(debug){
2146
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2147
direntries[i]->d_name);
2148
}
2149
}
2150
free(direntries);
2151
} else {
2152
free(direntries);
2153
fprintf_plus(stderr, "Could not find a network interface\n");
2154
exitcode = EXIT_FAILURE;
2155
goto end;
2156
}
2157
}
2158
2159
/* If we only got one interface, explicitly use only that one */
2160
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2161
if(debug){
2162
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2163
mc.interfaces);
2164
}
2165
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2166
}
2167
2168
/* Bring up interfaces which are down */
2169
if(not (argz_count(mc.interfaces, mc.interfaces_size) == 1
2170
and strcmp(mc.interfaces, "none") == 0)){
2171
char *interface = NULL;
2172
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2173
interface))){
2174
bool interface_was_up = interface_is_up(interface);
2175
ret = bring_up_interface(interface, delay);
2176
if(not interface_was_up){
2177
if(ret != 0){
2178
errno = ret;
2179
perror_plus("Failed to bring up interface");
2180
} else {
2181
ret_errno = argz_add(&interfaces_to_take_down,
2182
&interfaces_to_take_down_size,
2183
interface);
2184
}
2185
}
2186
}
2187
free(mc.interfaces);
2188
mc.interfaces = NULL;
2189
mc.interfaces_size = 0;
2190
if(debug and (interfaces_to_take_down == NULL)){
2191
fprintf_plus(stderr, "No interfaces were brought up\n");
1885
/* If the interface is down, bring it up */
1886
if(strcmp(interface, "none") != 0){
1887
if_index = (AvahiIfIndex) if_nametoindex(interface);
1888
if(if_index == 0){
1889
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1890
exitcode = EX_UNAVAILABLE;
1891
goto end;
1892
}
1893
1894
if(quit_now){
1895
goto end;
1896
}
1897
1898
/* Re-raise priviliges */
1899
errno = 0;
1900
ret = seteuid(0);
1901
if(ret == -1){
1902
perror_plus("seteuid");
1903
}
1904
1905
#ifdef __linux__
1906
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1907
messages about the network interface to mess up the prompt */
1908
ret = klogctl(8, NULL, 5);
1909
bool restore_loglevel = true;
1910
if(ret == -1){
1911
restore_loglevel = false;
1912
perror_plus("klogctl");
1913
}
1914
#endif /* __linux__ */
1915
1916
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1917
if(sd < 0){
1918
perror_plus("socket");
1919
exitcode = EX_OSERR;
1920
#ifdef __linux__
1921
if(restore_loglevel){
1922
ret = klogctl(7, NULL, 0);
1923
if(ret == -1){
1924
perror_plus("klogctl");
1925
}
1926
}
1927
#endif /* __linux__ */
1928
/* Lower privileges */
1929
errno = 0;
1930
ret = seteuid(uid);
1931
if(ret == -1){
1932
perror_plus("seteuid");
1933
}
1934
goto end;
1935
}
1936
strcpy(network.ifr_name, interface);
1937
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1938
if(ret == -1){
1939
perror_plus("ioctl SIOCGIFFLAGS");
1940
#ifdef __linux__
1941
if(restore_loglevel){
1942
ret = klogctl(7, NULL, 0);
1943
if(ret == -1){
1944
perror_plus("klogctl");
1945
}
1946
}
1947
#endif /* __linux__ */
1948
exitcode = EX_OSERR;
1949
/* Lower privileges */
1950
errno = 0;
1951
ret = seteuid(uid);
1952
if(ret == -1){
1953
perror_plus("seteuid");
1954
}
1955
goto end;
1956
}
1957
if((network.ifr_flags & IFF_UP) == 0){
1958
network.ifr_flags |= IFF_UP;
1959
take_down_interface = true;
1960
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1961
if(ret == -1){
1962
take_down_interface = false;
1963
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1964
exitcode = EX_OSERR;
1965
#ifdef __linux__
1966
if(restore_loglevel){
1967
ret = klogctl(7, NULL, 0);
1968
if(ret == -1){
1969
perror_plus("klogctl");
1970
}
1971
}
1972
#endif /* __linux__ */
1973
/* Lower privileges */
1974
errno = 0;
1975
ret = seteuid(uid);
1976
if(ret == -1){
1977
perror_plus("seteuid");
1978
}
1979
goto end;
1980
}
1981
}
1982
/* Sleep checking until interface is running.
1983
Check every 0.25s, up to total time of delay */
1984
for(int i=0; i < delay * 4; i++){
1985
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1986
if(ret == -1){
1987
perror_plus("ioctl SIOCGIFFLAGS");
1988
} else if(network.ifr_flags & IFF_RUNNING){
1989
break;
1990
}
1991
struct timespec sleeptime = { .tv_nsec = 250000000 };
1992
ret = nanosleep(&sleeptime, NULL);
1993
if(ret == -1 and errno != EINTR){
1994
perror_plus("nanosleep");
1995
}
1996
}
1997
if(not take_down_interface){
1998
/* We won't need the socket anymore */
1999
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2000
if(ret == -1){
2001
perror_plus("close");
2002
}
2003
}
2004
#ifdef __linux__
2005
if(restore_loglevel){
2006
/* Restores kernel loglevel to default */
2007
ret = klogctl(7, NULL, 0);
2008
if(ret == -1){
2009
perror_plus("klogctl");
2010
}
2011
}
2012
#endif /* __linux__ */
2013
/* Lower privileges */
2014
errno = 0;
2015
/* Lower privileges */
2016
ret = seteuid(uid);
2017
if(ret == -1){
2018
perror_plus("seteuid");
2192
2019
}
2193
2020
}
2194
2021
2196
2023
goto end;
2197
2024
}
2198
2025
2199
ret = init_gnutls_global(pubkey, seckey, &mc);
2026
ret = init_gnutls_global(pubkey, seckey);
2200
2027
if(ret == -1){
2201
2028
fprintf_plus(stderr, "init_gnutls_global failed\n");
2202
2029
exitcode = EX_UNAVAILABLE;
2219
2046
goto end;
2220
2047
}
2221
2048
2222
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2049
if(not init_gpgme(pubkey, seckey, tempdir)){
2223
2050
fprintf_plus(stderr, "init_gpgme failed\n");
2224
2051
exitcode = EX_UNAVAILABLE;
2225
2052
goto end;
2235
2062
/* Connect directly, do not use Zeroconf */
2236
2063
/* (Mainly meant for debugging) */
2237
2064
char *address = strrchr(connect_to, ':');
2238
2239
2065
if(address == NULL){
2240
2066
fprintf_plus(stderr, "No colon in address\n");
2241
2067
exitcode = EX_USAGE;
2246
2072
goto end;
2247
2073
}
2248
2074
2249
in_port_t port;
2075
uint16_t port;
2250
2076
errno = 0;
2251
2077
tmpmax = strtoimax(address+1, &tmp, 10);
2252
2078
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2253
or tmpmax != (in_port_t)tmpmax){
2079
or tmpmax != (uint16_t)tmpmax){
2254
2080
fprintf_plus(stderr, "Bad port number\n");
2255
2081
exitcode = EX_USAGE;
2256
2082
goto end;
2260
2086
goto end;
2261
2087
}
2262
2088
2263
port = (in_port_t)tmpmax;
2089
port = (uint16_t)tmpmax;
2264
2090
*address = '\0';
2265
2091
/* Colon in address indicates IPv6 */
2266
2092
int af;
2282
2108
}
2283
2109
2284
2110
while(not quit_now){
2285
ret = start_mandos_communication(address, port, if_index, af,
2286
&mc);
2111
ret = start_mandos_communication(address, port, if_index, af);
2287
2112
if(quit_now or ret == 0){
2288
2113
break;
2289
2114
}
2315
2140
config.publish_domain = 0;
2316
2141
2317
2142
/* Allocate a new server */
2318
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2319
&config, NULL, NULL, &ret_errno);
2143
mc.server = avahi_server_new(avahi_simple_poll_get
2144
(mc.simple_poll), &config, NULL,
2145
NULL, &error);
2320
2146
2321
2147
/* Free the Avahi configuration data */
2322
2148
avahi_server_config_free(&config);
2325
2151
/* Check if creating the Avahi server object succeeded */
2326
2152
if(mc.server == NULL){
2327
2153
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2328
avahi_strerror(ret_errno));
2154
avahi_strerror(error));
2329
2155
exitcode = EX_UNAVAILABLE;
2330
2156
goto end;
2331
2157
}
2337
2163
/* Create the Avahi service browser */
2338
2164
sb = avahi_s_service_browser_new(mc.server, if_index,
2339
2165
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2340
NULL, 0, browse_callback,
2341
(void *)&mc);
2166
NULL, 0, browse_callback, NULL);
2342
2167
if(sb == NULL){
2343
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2344
2169
avahi_strerror(avahi_server_errno(mc.server)));
2356
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
2357
2182
}
2358
2183
2359
ret = avahi_loop_with_timeout(simple_poll,
2360
(int)(retry_interval * 1000), &mc);
2184
ret = avahi_loop_with_timeout(mc.simple_poll,
2185
(int)(retry_interval * 1000));
2361
2186
if(debug){
2362
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2363
2188
(ret == 0) ? "successfully" : "with error");
2376
2201
if(mc.server != NULL)
2377
2202
avahi_server_free(mc.server);
2378
2203
2379
if(simple_poll != NULL)
2380
avahi_simple_poll_free(simple_poll);
2204
if(mc.simple_poll != NULL)
2205
avahi_simple_poll_free(mc.simple_poll);
2381
2206
2382
2207
if(gnutls_initialized){
2383
2208
gnutls_certificate_free_credentials(mc.cred);
2400
2225
}
2401
2226
}
2402
2227
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2230
2403
2231
/* Re-raise priviliges */
2404
2232
{
2405
raise_privileges();
2406
2407
/* Run network hooks */
2408
run_network_hooks("stop", interfaces_hooks != NULL ?
2409
interfaces_hooks : "", delay);
2410
2411
/* Take down the network interfaces which were brought up */
2412
{
2413
char *interface = NULL;
2414
while((interface=argz_next(interfaces_to_take_down,
2415
interfaces_to_take_down_size,
2416
interface))){
2417
ret_errno = take_down_interface(interface);
2418
if(ret_errno != 0){
2419
errno = ret_errno;
2420
perror_plus("Failed to take down interface");
2233
errno = 0;
2234
ret = seteuid(0);
2235
if(ret == -1){
2236
perror_plus("seteuid");
2237
}
2238
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
2241
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2242
if(ret == -1){
2243
perror_plus("ioctl SIOCGIFFLAGS");
2244
} else if(network.ifr_flags & IFF_UP){
2245
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2246
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2247
if(ret == -1){
2248
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2421
2249
}
2422
2250
}
2423
if(debug and (interfaces_to_take_down == NULL)){
2424
fprintf_plus(stderr, "No interfaces needed to be taken"
2425
" down\n");
2251
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2252
if(ret == -1){
2253
perror_plus("close");
2426
2254
}
2427
2255
}
2428
2429
lower_privileges_permanently();
2430
}
2431
2432
free(interfaces_to_take_down);
2433
free(interfaces_hooks);
2256
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2262
}
2434
2263
2435
2264
/* Removes the GPGME temp directory and all files inside */
2436
2265
if(tempdir_created){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0