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- Committer: Teddy Hogeborn
- Date: 2011-11-28 22:15:04 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-20111128221504-aij86bkvdafxino5
* Makefile (install-client-nokey): Create network hook directory.
* debian/mandos-client.README.Debian: Corrected mail address.
* debian/mandos-client.README.Debian: Corrected mail address.
- 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;
163
159
server *current_server;
164
160
} mandos_context;
165
161
166
/* global so signal handler can reach it*/
167
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 };
168
167
169
168
sig_atomic_t quit_now = 0;
170
169
int signal_received = 0;
171
170
172
171
/* Function to use when printing errors */
173
172
void perror_plus(const char *print_text){
174
int e = errno;
175
173
fprintf(stderr, "Mandos plugin %s: ",
176
174
program_invocation_short_name);
177
errno = e;
178
175
perror(print_text);
179
176
}
180
177
181
__attribute__((format (gnu_printf, 2, 3)))
182
178
int fprintf_plus(FILE *stream, const char *format, ...){
183
179
va_list ap;
184
180
va_start (ap, format);
206
202
}
207
203
208
204
/* Add server to set of servers to retry periodically */
209
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
210
int af, server **current_server){
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
211
207
int ret;
212
208
server *new_server = malloc(sizeof(server));
213
209
if(new_server == NULL){
214
210
perror_plus("malloc");
215
return false;
211
return -1;
216
212
}
217
213
*new_server = (server){ .ip = strdup(ip),
218
214
.port = port,
220
216
.af = af };
221
217
if(new_server->ip == NULL){
222
218
perror_plus("strdup");
223
return false;
219
return -1;
224
220
}
225
221
/* Special case of first server */
226
if(*current_server == NULL){
222
if (mc.current_server == NULL){
227
223
new_server->next = new_server;
228
224
new_server->prev = new_server;
229
*current_server = new_server;
225
mc.current_server = new_server;
230
226
/* Place the new server last in the list */
231
227
} else {
232
new_server->next = *current_server;
233
new_server->prev = (*current_server)->prev;
228
new_server->next = mc.current_server;
229
new_server->prev = mc.current_server->prev;
234
230
new_server->prev->next = new_server;
235
(*current_server)->prev = new_server;
231
mc.current_server->prev = new_server;
236
232
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
233
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
238
234
if(ret == -1){
239
235
perror_plus("clock_gettime");
240
return false;
236
return -1;
241
237
}
242
return true;
238
return 0;
243
239
}
244
240
245
241
/*
246
242
* Initialize GPGME.
247
243
*/
248
244
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
245
const char *tempdir){
250
246
gpgme_error_t rc;
251
247
gpgme_engine_info_t engine_info;
252
248
249
253
250
/*
254
251
* Helper function to insert pub and seckey to the engine keyring.
255
252
*/
271
268
return false;
272
269
}
273
270
274
rc = gpgme_op_import(mc->ctx, pgp_data);
271
rc = gpgme_op_import(mc.ctx, pgp_data);
275
272
if(rc != GPG_ERR_NO_ERROR){
276
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
274
gpgme_strsource(rc), gpgme_strerror(rc));
321
318
}
322
319
323
320
/* Create new GPGME "context" */
324
rc = gpgme_new(&(mc->ctx));
321
rc = gpgme_new(&(mc.ctx));
325
322
if(rc != GPG_ERR_NO_ERROR){
326
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
342
339
*/
343
340
static ssize_t pgp_packet_decrypt(const char *cryptotext,
344
341
size_t crypto_size,
345
char **plaintext,
346
mandos_context *mc){
342
char **plaintext){
347
343
gpgme_data_t dh_crypto, dh_plain;
348
344
gpgme_error_t rc;
349
345
ssize_t ret;
375
371
376
372
/* Decrypt data from the cryptotext data buffer to the plaintext
377
373
data buffer */
378
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
374
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
379
375
if(rc != GPG_ERR_NO_ERROR){
380
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
381
377
gpgme_strsource(rc), gpgme_strerror(rc));
382
378
plaintext_length = -1;
383
379
if(debug){
384
380
gpgme_decrypt_result_t result;
385
result = gpgme_op_decrypt_result(mc->ctx);
381
result = gpgme_op_decrypt_result(mc.ctx);
386
382
if(result == NULL){
387
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
388
384
} else {
466
462
}
467
463
468
464
static const char * safer_gnutls_strerror(int value){
469
const char *ret = gnutls_strerror(value);
465
const char *ret = gnutls_strerror(value); /* Spurious warning from
466
-Wunreachable-code */
470
467
if(ret == NULL)
471
468
ret = "(unknown)";
472
469
return ret;
479
476
}
480
477
481
478
static int init_gnutls_global(const char *pubkeyfilename,
482
const char *seckeyfilename,
483
mandos_context *mc){
479
const char *seckeyfilename){
484
480
int ret;
485
481
486
482
if(debug){
503
499
}
504
500
505
501
/* OpenPGP credentials */
506
ret = gnutls_certificate_allocate_credentials(&mc->cred);
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
507
503
if(ret != GNUTLS_E_SUCCESS){
508
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
509
505
safer_gnutls_strerror(ret));
519
515
}
520
516
521
517
ret = gnutls_certificate_set_openpgp_key_file
522
(mc->cred, pubkeyfilename, seckeyfilename,
518
(mc.cred, pubkeyfilename, seckeyfilename,
523
519
GNUTLS_OPENPGP_FMT_BASE64);
524
520
if(ret != GNUTLS_E_SUCCESS){
525
521
fprintf_plus(stderr,
531
527
}
532
528
533
529
/* GnuTLS server initialization */
534
ret = gnutls_dh_params_init(&mc->dh_params);
530
ret = gnutls_dh_params_init(&mc.dh_params);
535
531
if(ret != GNUTLS_E_SUCCESS){
536
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
537
533
" initialization: %s\n",
538
534
safer_gnutls_strerror(ret));
539
535
goto globalfail;
540
536
}
541
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
537
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
542
538
if(ret != GNUTLS_E_SUCCESS){
543
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
544
540
safer_gnutls_strerror(ret));
545
541
goto globalfail;
546
542
}
547
543
548
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
544
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
549
545
550
546
return 0;
551
547
552
548
globalfail:
553
549
554
gnutls_certificate_free_credentials(mc->cred);
550
gnutls_certificate_free_credentials(mc.cred);
555
551
gnutls_global_deinit();
556
gnutls_dh_params_deinit(mc->dh_params);
552
gnutls_dh_params_deinit(mc.dh_params);
557
553
return -1;
558
554
}
559
555
560
static int init_gnutls_session(gnutls_session_t *session,
561
mandos_context *mc){
556
static int init_gnutls_session(gnutls_session_t *session){
562
557
int ret;
563
558
/* GnuTLS session creation */
564
559
do {
576
571
{
577
572
const char *err;
578
573
do {
579
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
574
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
580
575
if(quit_now){
581
576
gnutls_deinit(*session);
582
577
return -1;
593
588
594
589
do {
595
590
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
596
mc->cred);
591
mc.cred);
597
592
if(quit_now){
598
593
gnutls_deinit(*session);
599
594
return -1;
609
604
/* ignore client certificate if any. */
610
605
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
611
606
612
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
607
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
613
608
614
609
return 0;
615
610
}
619
614
__attribute__((unused)) const char *txt){}
620
615
621
616
/* Called when a Mandos server is found */
622
static int start_mandos_communication(const char *ip, in_port_t port,
617
static int start_mandos_communication(const char *ip, uint16_t port,
623
618
AvahiIfIndex if_index,
624
int af, mandos_context *mc){
619
int af){
625
620
int ret, tcp_sd = -1;
626
621
ssize_t sret;
627
622
union {
657
652
return -1;
658
653
}
659
654
660
ret = init_gnutls_session(&session, mc);
655
ret = init_gnutls_session(&session);
661
656
if(ret != 0){
662
657
return -1;
663
658
}
664
659
665
660
if(debug){
666
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
667
PRIuMAX "\n", ip, (uintmax_t)port);
662
PRIu16 "\n", ip, port);
668
663
}
669
664
670
665
tcp_sd = socket(pf, SOCK_STREAM, 0);
701
696
goto mandos_end;
702
697
}
703
698
if(af == AF_INET6){
704
to.in6.sin6_port = htons(port);
699
to.in6.sin6_port = htons(port); /* Spurious warnings from
700
-Wconversion and
701
-Wunreachable-code */
702
705
703
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
704
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
705
-Wunreachable-code*/
731
729
if(if_indextoname((unsigned int)if_index, interface) == NULL){
732
730
perror_plus("if_indextoname");
733
731
} else {
734
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
735
"\n", ip, interface, (uintmax_t)port);
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
736
734
}
737
735
} else {
738
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
739
ip, (uintmax_t)port);
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
740
738
}
741
739
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
742
740
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
820
818
goto mandos_end;
821
819
}
822
820
823
/* This casting via intptr_t is to eliminate warning about casting
824
an int to a pointer type. This is exactly how the GnuTLS Guile
825
function "set-session-transport-fd!" does it. */
826
gnutls_transport_set_ptr(session,
827
(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);
828
823
829
824
if(quit_now){
830
825
errno = EINTR;
935
930
if(buffer_length > 0){
936
931
ssize_t decrypted_buffer_size;
937
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
938
&decrypted_buffer, mc);
933
&decrypted_buffer);
939
934
if(decrypted_buffer_size >= 0){
940
935
941
936
written = 0;
1002
997
AVAHI_GCC_UNUSED AvahiStringList *txt,
1003
998
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1004
999
flags,
1005
void* mc){
1006
if(r == NULL){
1007
return;
1008
}
1000
AVAHI_GCC_UNUSED void* userdata){
1001
assert(r);
1009
1002
1010
1003
/* Called whenever a service has been resolved successfully or
1011
1004
timed out */
1020
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1021
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1022
1015
domain,
1023
avahi_strerror(avahi_server_errno
1024
(((mandos_context*)mc)->server)));
1016
avahi_strerror(avahi_server_errno(mc.server)));
1025
1017
break;
1026
1018
1027
1019
case AVAHI_RESOLVER_FOUND:
1033
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1034
1026
host_name, ip, (intmax_t)interface, port);
1035
1027
}
1036
int ret = start_mandos_communication(ip, (in_port_t)port,
1037
interface,
1038
avahi_proto_to_af(proto),
1039
mc);
1028
int ret = start_mandos_communication(ip, port, interface,
1029
avahi_proto_to_af(proto));
1040
1030
if(ret == 0){
1041
avahi_simple_poll_quit(simple_poll);
1031
avahi_simple_poll_quit(mc.simple_poll);
1042
1032
} else {
1043
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto),
1045
&((mandos_context*)mc)->current_server)){
1046
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1047
" list\n", name);
1048
}
1033
ret = add_server(ip, port, interface,
1034
avahi_proto_to_af(proto));
1049
1035
}
1050
1036
}
1051
1037
}
1061
1047
const char *domain,
1062
1048
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1063
1049
flags,
1064
void* mc){
1065
if(b == NULL){
1066
return;
1067
}
1050
AVAHI_GCC_UNUSED void* userdata){
1051
assert(b);
1068
1052
1069
1053
/* Called whenever a new services becomes available on the LAN or
1070
1054
is removed from the LAN */
1078
1062
case AVAHI_BROWSER_FAILURE:
1079
1063
1080
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1081
avahi_strerror(avahi_server_errno
1082
(((mandos_context*)mc)->server)));
1083
avahi_simple_poll_quit(simple_poll);
1065
avahi_strerror(avahi_server_errno(mc.server)));
1066
avahi_simple_poll_quit(mc.simple_poll);
1084
1067
return;
1085
1068
1086
1069
case AVAHI_BROWSER_NEW:
1089
1072
the callback function is called the Avahi server will free the
1090
1073
resolver for us. */
1091
1074
1092
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1093
interface, protocol, name, type,
1094
domain, protocol, 0,
1095
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)
1096
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1097
1079
" %s\n", name,
1098
avahi_strerror(avahi_server_errno
1099
(((mandos_context*)mc)->server)));
1080
avahi_strerror(avahi_server_errno(mc.server)));
1100
1081
break;
1101
1082
1102
1083
case AVAHI_BROWSER_REMOVE:
1121
1102
signal_received = sig;
1122
1103
int old_errno = errno;
1123
1104
/* set main loop to exit */
1124
if(simple_poll != NULL){
1125
avahi_simple_poll_quit(simple_poll);
1105
if(mc.simple_poll != NULL){
1106
avahi_simple_poll_quit(mc.simple_poll);
1126
1107
}
1127
1108
errno = old_errno;
1128
1109
}
1129
1110
1130
1111
bool get_flags(const char *ifname, struct ifreq *ifr){
1131
1112
int ret;
1132
error_t ret_errno;
1133
1113
1134
1114
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1135
1115
if(s < 0){
1136
ret_errno = errno;
1137
1116
perror_plus("socket");
1138
errno = ret_errno;
1139
1117
return false;
1140
1118
}
1141
1119
strcpy(ifr->ifr_name, ifname);
1142
1120
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1143
1121
if(ret == -1){
1144
1122
if(debug){
1145
ret_errno = errno;
1146
1123
perror_plus("ioctl SIOCGIFFLAGS");
1147
errno = ret_errno;
1148
1124
}
1149
1125
return false;
1150
1126
}
1219
1195
}
1220
1196
1221
1197
/*
1222
* This function determines if a network interface is up.
1223
*/
1224
bool interface_is_up(const char *interface){
1225
struct ifreq ifr;
1226
if(not get_flags(interface, &ifr)){
1227
if(debug){
1228
fprintf_plus(stderr, "Failed to get flags for interface "
1229
"\"%s\"\n", interface);
1230
}
1231
return false;
1232
}
1233
1234
return (bool)(ifr.ifr_flags & IFF_UP);
1235
}
1236
1237
/*
1238
* This function determines if a network interface is running
1239
*/
1240
bool interface_is_running(const char *interface){
1241
struct ifreq ifr;
1242
if(not get_flags(interface, &ifr)){
1243
if(debug){
1244
fprintf_plus(stderr, "Failed to get flags for interface "
1245
"\"%s\"\n", interface);
1246
}
1247
return false;
1248
}
1249
1250
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;
1251
1238
}
1252
1239
1253
1240
int notdotentries(const struct dirent *direntry){
1322
1309
return 1;
1323
1310
}
1324
1311
1325
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1326
mandos_context *mc){
1312
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1327
1313
int ret;
1328
1314
struct timespec now;
1329
1315
struct timespec waited_time;
1330
1316
intmax_t block_time;
1331
1317
1332
1318
while(true){
1333
if(mc->current_server == NULL){
1319
if(mc.current_server == NULL){
1334
1320
if (debug){
1335
1321
fprintf_plus(stderr, "Wait until first server is found."
1336
1322
" No timeout!\n");
1350
1336
/* Calculating in ms how long time between now and server
1351
1337
who we visted longest time ago. Now - last seen. */
1352
1338
waited_time.tv_sec = (now.tv_sec
1353
- mc->current_server->last_seen.tv_sec);
1339
- mc.current_server->last_seen.tv_sec);
1354
1340
waited_time.tv_nsec = (now.tv_nsec
1355
- mc->current_server->last_seen.tv_nsec);
1341
- mc.current_server->last_seen.tv_nsec);
1356
1342
/* total time is 10s/10,000ms.
1357
1343
Converting to s from ms by dividing by 1,000,
1358
1344
and ns to ms by dividing by 1,000,000. */
1366
1352
}
1367
1353
1368
1354
if(block_time <= 0){
1369
ret = start_mandos_communication(mc->current_server->ip,
1370
mc->current_server->port,
1371
mc->current_server->if_index,
1372
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);
1373
1359
if(ret == 0){
1374
avahi_simple_poll_quit(s);
1360
avahi_simple_poll_quit(mc.simple_poll);
1375
1361
return 0;
1376
1362
}
1377
1363
ret = clock_gettime(CLOCK_MONOTONIC,
1378
&mc->current_server->last_seen);
1364
&mc.current_server->last_seen);
1379
1365
if(ret == -1){
1380
1366
perror_plus("clock_gettime");
1381
1367
return -1;
1382
1368
}
1383
mc->current_server = mc->current_server->next;
1369
mc.current_server = mc.current_server->next;
1384
1370
block_time = 0; /* Call avahi to find new Mandos
1385
1371
servers, but don't block */
1386
1372
}
1395
1381
}
1396
1382
}
1397
1383
1398
/* Set effective uid to 0, return errno */
1399
error_t raise_privileges(void){
1400
error_t old_errno = errno;
1401
error_t ret_errno = 0;
1402
if(seteuid(0) == -1){
1403
ret_errno = errno;
1404
perror_plus("seteuid");
1405
}
1406
errno = old_errno;
1407
return ret_errno;
1408
}
1409
1410
/* Set effective and real user ID to 0. Return errno. */
1411
error_t raise_privileges_permanently(void){
1412
error_t old_errno = errno;
1413
error_t ret_errno = raise_privileges();
1414
if(ret_errno != 0){
1415
errno = old_errno;
1416
return ret_errno;
1417
}
1418
if(setuid(0) == -1){
1419
ret_errno = errno;
1420
perror_plus("seteuid");
1421
}
1422
errno = old_errno;
1423
return ret_errno;
1424
}
1425
1426
/* Set effective user ID to unprivileged saved user ID */
1427
error_t lower_privileges(void){
1428
error_t old_errno = errno;
1429
error_t ret_errno = 0;
1430
if(seteuid(uid) == -1){
1431
ret_errno = errno;
1432
perror_plus("seteuid");
1433
}
1434
errno = old_errno;
1435
return ret_errno;
1436
}
1437
1438
/* Lower privileges permanently */
1439
error_t lower_privileges_permanently(void){
1440
error_t old_errno = errno;
1441
error_t ret_errno = 0;
1442
if(setuid(uid) == -1){
1443
ret_errno = errno;
1444
perror_plus("setuid");
1445
}
1446
errno = old_errno;
1447
return ret_errno;
1448
}
1449
1450
1384
bool run_network_hooks(const char *mode, const char *interface,
1451
1385
const float delay){
1452
1386
struct dirent **direntries;
1455
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
1390
alphasort);
1457
1391
if(numhooks == -1){
1458
if(errno == ENOENT){
1459
if(debug){
1460
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1461
" found\n", hookdir);
1462
}
1463
} else {
1464
perror_plus("scandir");
1465
}
1392
perror_plus("scandir");
1466
1393
} else {
1467
1394
int devnull = open("/dev/null", O_RDONLY);
1468
1395
for(int i = 0; i < numhooks; i++){
1481
1408
if(hook_pid == 0){
1482
1409
/* Child */
1483
1410
/* Raise privileges */
1484
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
}
1485
1422
/* Set group */
1486
1423
errno = 0;
1487
1424
ret = setgid(0);
1494
1431
if(ret == -1){
1495
1432
perror_plus("setgroups");
1496
1433
}
1434
fprintf_plus(stderr, "Child: getuid() = %d\n", getuid());
1435
fprintf_plus(stderr, "Child: geteuid() = %d\n", geteuid());
1497
1436
dup2(devnull, STDIN_FILENO);
1498
1437
close(devnull);
1499
1438
dup2(STDERR_FILENO, STDOUT_FILENO);
1507
1446
perror_plus("setenv");
1508
1447
_exit(EX_OSERR);
1509
1448
}
1510
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1449
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1511
1450
if(ret == -1){
1512
1451
perror_plus("setenv");
1513
1452
_exit(EX_OSERR);
1530
1469
_exit(EX_OSERR);
1531
1470
}
1532
1471
free(delaystring);
1533
if(connect_to != NULL){
1534
ret = setenv("CONNECT", connect_to, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
}
1540
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1541
perror_plus("execl");
1542
_exit(EXIT_FAILURE);
1543
}
1472
ret = execl(fullname, direntry->d_name, mode, NULL);
1473
perror_plus("execl");
1544
1474
} else {
1545
1475
int status;
1546
1476
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1580
1510
return true;
1581
1511
}
1582
1512
1583
error_t bring_up_interface(const char *const interface,
1584
const float delay){
1585
int sd = -1;
1586
error_t old_errno = errno;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1589
struct ifreq network;
1590
unsigned int if_index = if_nametoindex(interface);
1591
if(if_index == 0){
1592
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1593
errno = old_errno;
1594
return ENXIO;
1595
}
1596
1597
if(quit_now){
1598
errno = old_errno;
1599
return EINTR;
1600
}
1601
1602
if(not interface_is_up(interface)){
1603
if(not get_flags(interface, &network) and debug){
1604
ret_errno = errno;
1605
fprintf_plus(stderr, "Failed to get flags for interface "
1606
"\"%s\"\n", interface);
1607
return ret_errno;
1608
}
1609
network.ifr_flags |= IFF_UP;
1610
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1613
ret_errno = errno;
1614
perror_plus("socket");
1615
errno = old_errno;
1616
return ret_errno;
1617
}
1618
1619
if(quit_now){
1620
close(sd);
1621
errno = old_errno;
1622
return EINTR;
1623
}
1624
1625
if(debug){
1626
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1627
interface);
1628
}
1629
1630
/* Raise priviliges */
1631
raise_privileges();
1632
1633
#ifdef __linux__
1634
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1635
messages about the network interface to mess up the prompt */
1636
int ret_linux = klogctl(8, NULL, 5);
1637
bool restore_loglevel = true;
1638
if(ret_linux == -1){
1639
restore_loglevel = false;
1640
perror_plus("klogctl");
1641
}
1642
#endif /* __linux__ */
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1645
#ifdef __linux__
1646
if(restore_loglevel){
1647
ret_linux = klogctl(7, NULL, 0);
1648
if(ret_linux == -1){
1649
perror_plus("klogctl");
1650
}
1651
}
1652
#endif /* __linux__ */
1653
1654
/* Lower privileges */
1655
lower_privileges();
1656
1657
/* Close the socket */
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1659
if(ret == -1){
1660
perror_plus("close");
1661
}
1662
1663
if(ret_setflags == -1){
1664
errno = ret_errno;
1665
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1666
errno = old_errno;
1667
return ret_errno;
1668
}
1669
} else if(debug){
1670
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1671
interface);
1672
}
1673
1674
/* Sleep checking until interface is running.
1675
Check every 0.25s, up to total time of delay */
1676
for(int i=0; i < delay * 4; i++){
1677
if(interface_is_running(interface)){
1678
break;
1679
}
1680
struct timespec sleeptime = { .tv_nsec = 250000000 };
1681
ret = nanosleep(&sleeptime, NULL);
1682
if(ret == -1 and errno != EINTR){
1683
perror_plus("nanosleep");
1684
}
1685
}
1686
1687
errno = old_errno;
1688
return 0;
1689
}
1690
1691
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1693
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1696
struct ifreq network;
1697
unsigned int if_index = if_nametoindex(interface);
1698
if(if_index == 0){
1699
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1700
errno = old_errno;
1701
return ENXIO;
1702
}
1703
if(interface_is_up(interface)){
1704
if(not get_flags(interface, &network) and debug){
1705
ret_errno = errno;
1706
fprintf_plus(stderr, "Failed to get flags for interface "
1707
"\"%s\"\n", interface);
1708
return ret_errno;
1709
}
1710
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1711
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1714
ret_errno = errno;
1715
perror_plus("socket");
1716
errno = old_errno;
1717
return ret_errno;
1718
}
1719
1720
if(debug){
1721
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1722
interface);
1723
}
1724
1725
/* Raise priviliges */
1726
raise_privileges();
1727
1728
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1729
ret_errno = errno;
1730
1731
/* Lower privileges */
1732
lower_privileges();
1733
1734
/* Close the socket */
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1736
if(ret == -1){
1737
perror_plus("close");
1738
}
1739
1740
if(ret_setflags == -1){
1741
errno = ret_errno;
1742
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1743
errno = old_errno;
1744
return ret_errno;
1745
}
1746
} else if(debug){
1747
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1748
interface);
1749
}
1750
1751
errno = old_errno;
1752
return 0;
1753
}
1754
1755
1513
int main(int argc, char *argv[]){
1756
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1757
.priority = "SECURE256:!CTYPE-X.509:"
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1759
1514
AvahiSServiceBrowser *sb = NULL;
1760
error_t ret_errno;
1515
int error;
1761
1516
int ret;
1762
1517
intmax_t tmpmax;
1763
1518
char *tmp;
1764
1519
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1767
char *interfaces_to_take_down = NULL;
1768
size_t interfaces_to_take_down_size = 0;
1520
const char *interface = "";
1521
struct ifreq network;
1522
int sd = -1;
1523
bool take_down_interface = false;
1524
uid_t uid;
1525
gid_t gid;
1769
1526
char tempdir[] = "/tmp/mandosXXXXXX";
1770
1527
bool tempdir_created = false;
1771
1528
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1772
1529
const char *seckey = PATHDIR "/" SECKEY;
1773
1530
const char *pubkey = PATHDIR "/" PUBKEY;
1774
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1776
1531
1777
1532
bool gnutls_initialized = false;
1778
1533
bool gpgme_initialized = false;
1840
1595
.group = 2 },
1841
1596
{ .name = "retry", .key = 132,
1842
1597
.arg = "SECONDS",
1843
.doc = "Retry interval used when denied by the Mandos server",
1598
.doc = "Retry interval used when denied by the mandos server",
1844
1599
.group = 2 },
1845
1600
{ .name = "network-hook-dir", .key = 133,
1846
1601
.arg = "DIR",
1869
1624
connect_to = arg;
1870
1625
break;
1871
1626
case 'i': /* --interface */
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
1874
if(ret_errno != 0){
1875
argp_error(state, "%s", strerror(ret_errno));
1876
}
1627
interface = arg;
1877
1628
break;
1878
1629
case 's': /* --seckey */
1879
1630
seckey = arg;
1922
1673
argp_state_help(state, state->out_stream,
1923
1674
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1924
1675
case 'V': /* --version */
1676
fprintf_plus(state->out_stream,
1677
"Mandos plugin mandos-client: ");
1925
1678
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1926
1679
exit(argp_err_exit_status);
1927
1680
break;
1957
1710
<http://bugs.debian.org/633582> */
1958
1711
1959
1712
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
1713
errno = 0;
1714
ret = seteuid(0);
1715
if(ret == -1){
1716
perror_plus("seteuid");
1717
} else {
1961
1718
struct stat st;
1962
1719
1963
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2011
1768
}
2012
1769
}
2013
1770
2014
/* Remove empty interface names */
2015
{
2016
char *interface = NULL;
2017
while((interface = argz_next(interfaces, interfaces_size,
2018
interface))){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2021
fprintf_plus(stderr, "Not using nonexisting interface"
2022
" \"%s\"\n", interface);
2023
}
2024
argz_delete(&interfaces, &interfaces_size, interface);
2025
interface = NULL;
2026
}
2027
}
2028
}
2029
2030
1771
/* Run network hooks */
2031
{
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2035
if(interfaces_hooks == NULL){
2036
perror_plus("malloc");
2037
goto end;
2038
}
2039
memcpy(interfaces_hooks, interfaces, interfaces_size);
2040
interfaces_hooks_size = interfaces_size;
2041
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2042
(int)',');
2043
}
2044
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2045
interfaces_hooks : "", delay)){
2046
goto end;
2047
}
1772
if(not run_network_hooks("start", interface, delay)){
1773
goto end;
2048
1774
}
2049
1775
2050
1776
if(not debug){
2051
1777
avahi_set_log_function(empty_log);
2052
1778
}
2053
1779
1780
if(interface[0] == '\0'){
1781
struct dirent **direntries;
1782
/* First look for interfaces that are up */
1783
ret = scandir(sys_class_net, &direntries, up_interface,
1784
alphasort);
1785
if(ret == 0){
1786
/* No up interfaces, look for any good interfaces */
1787
free(direntries);
1788
ret = scandir(sys_class_net, &direntries, good_interface,
1789
alphasort);
1790
}
1791
if(ret >= 1){
1792
/* Pick the first interface returned */
1793
interface = strdup(direntries[0]->d_name);
1794
if(debug){
1795
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1796
}
1797
if(interface == NULL){
1798
perror_plus("malloc");
1799
free(direntries);
1800
exitcode = EXIT_FAILURE;
1801
goto end;
1802
}
1803
free(direntries);
1804
} else {
1805
free(direntries);
1806
fprintf_plus(stderr, "Could not find a network interface\n");
1807
exitcode = EXIT_FAILURE;
1808
goto end;
1809
}
1810
}
1811
2054
1812
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2055
1813
from the signal handler */
2056
1814
/* Initialize the pseudo-RNG for Avahi */
2057
1815
srand((unsigned int) time(NULL));
2058
simple_poll = avahi_simple_poll_new();
2059
if(simple_poll == NULL){
1816
mc.simple_poll = avahi_simple_poll_new();
1817
if(mc.simple_poll == NULL){
2060
1818
fprintf_plus(stderr,
2061
1819
"Avahi: Failed to create simple poll object.\n");
2062
1820
exitcode = EX_UNAVAILABLE;
2126
1884
}
2127
1885
}
2128
1886
2129
/* If no interfaces were specified, make a list */
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2132
/* Look for any good interfaces */
2133
ret = scandir(sys_class_net, &direntries, good_interface,
2134
alphasort);
2135
if(ret >= 1){
2136
/* Add all found interfaces to interfaces list */
2137
for(int i = 0; i < ret; ++i){
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2139
direntries[i]->d_name);
2140
if(ret_errno != 0){
2141
perror_plus("argz_add");
2142
continue;
2143
}
2144
if(debug){
2145
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2146
direntries[i]->d_name);
2147
}
2148
}
2149
free(direntries);
2150
} else {
2151
free(direntries);
2152
fprintf_plus(stderr, "Could not find a network interface\n");
2153
exitcode = EXIT_FAILURE;
2154
goto end;
2155
}
2156
}
2157
2158
/* If we only got one interface, explicitly use only that one */
2159
if(argz_count(interfaces, interfaces_size) == 1){
2160
if(debug){
2161
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2162
interfaces);
2163
}
2164
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2165
}
2166
2167
/* Bring up interfaces which are down */
2168
if(not (argz_count(interfaces, interfaces_size) == 1
2169
and strcmp(interfaces, "none") == 0)){
2170
char *interface = NULL;
2171
while((interface = argz_next(interfaces, interfaces_size,
2172
interface))){
2173
bool interface_was_up = interface_is_up(interface);
2174
ret = bring_up_interface(interface, delay);
2175
if(not interface_was_up){
2176
if(ret != 0){
2177
errno = ret;
2178
perror_plus("Failed to bring up interface");
2179
} else {
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
2183
}
2184
}
2185
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2189
if(debug and (interfaces_to_take_down == NULL)){
2190
fprintf_plus(stderr, "No interfaces were brought up\n");
1887
/* If the interface is down, bring it up */
1888
if(strcmp(interface, "none") != 0){
1889
if_index = (AvahiIfIndex) if_nametoindex(interface);
1890
if(if_index == 0){
1891
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1892
exitcode = EX_UNAVAILABLE;
1893
goto end;
1894
}
1895
1896
if(quit_now){
1897
goto end;
1898
}
1899
1900
/* Re-raise priviliges */
1901
errno = 0;
1902
ret = seteuid(0);
1903
if(ret == -1){
1904
perror_plus("seteuid");
1905
}
1906
1907
#ifdef __linux__
1908
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1909
messages about the network interface to mess up the prompt */
1910
ret = klogctl(8, NULL, 5);
1911
bool restore_loglevel = true;
1912
if(ret == -1){
1913
restore_loglevel = false;
1914
perror_plus("klogctl");
1915
}
1916
#endif /* __linux__ */
1917
1918
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1919
if(sd < 0){
1920
perror_plus("socket");
1921
exitcode = EX_OSERR;
1922
#ifdef __linux__
1923
if(restore_loglevel){
1924
ret = klogctl(7, NULL, 0);
1925
if(ret == -1){
1926
perror_plus("klogctl");
1927
}
1928
}
1929
#endif /* __linux__ */
1930
/* Lower privileges */
1931
errno = 0;
1932
ret = seteuid(uid);
1933
if(ret == -1){
1934
perror_plus("seteuid");
1935
}
1936
goto end;
1937
}
1938
strcpy(network.ifr_name, interface);
1939
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1940
if(ret == -1){
1941
perror_plus("ioctl SIOCGIFFLAGS");
1942
#ifdef __linux__
1943
if(restore_loglevel){
1944
ret = klogctl(7, NULL, 0);
1945
if(ret == -1){
1946
perror_plus("klogctl");
1947
}
1948
}
1949
#endif /* __linux__ */
1950
exitcode = EX_OSERR;
1951
/* Lower privileges */
1952
errno = 0;
1953
ret = seteuid(uid);
1954
if(ret == -1){
1955
perror_plus("seteuid");
1956
}
1957
goto end;
1958
}
1959
if((network.ifr_flags & IFF_UP) == 0){
1960
network.ifr_flags |= IFF_UP;
1961
take_down_interface = true;
1962
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1963
if(ret == -1){
1964
take_down_interface = false;
1965
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1966
exitcode = EX_OSERR;
1967
#ifdef __linux__
1968
if(restore_loglevel){
1969
ret = klogctl(7, NULL, 0);
1970
if(ret == -1){
1971
perror_plus("klogctl");
1972
}
1973
}
1974
#endif /* __linux__ */
1975
/* Lower privileges */
1976
errno = 0;
1977
ret = seteuid(uid);
1978
if(ret == -1){
1979
perror_plus("seteuid");
1980
}
1981
goto end;
1982
}
1983
}
1984
/* Sleep checking until interface is running.
1985
Check every 0.25s, up to total time of delay */
1986
for(int i=0; i < delay * 4; i++){
1987
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1988
if(ret == -1){
1989
perror_plus("ioctl SIOCGIFFLAGS");
1990
} else if(network.ifr_flags & IFF_RUNNING){
1991
break;
1992
}
1993
struct timespec sleeptime = { .tv_nsec = 250000000 };
1994
ret = nanosleep(&sleeptime, NULL);
1995
if(ret == -1 and errno != EINTR){
1996
perror_plus("nanosleep");
1997
}
1998
}
1999
if(not take_down_interface){
2000
/* We won't need the socket anymore */
2001
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2002
if(ret == -1){
2003
perror_plus("close");
2004
}
2005
}
2006
#ifdef __linux__
2007
if(restore_loglevel){
2008
/* Restores kernel loglevel to default */
2009
ret = klogctl(7, NULL, 0);
2010
if(ret == -1){
2011
perror_plus("klogctl");
2012
}
2013
}
2014
#endif /* __linux__ */
2015
/* Lower privileges */
2016
errno = 0;
2017
/* Lower privileges */
2018
ret = seteuid(uid);
2019
if(ret == -1){
2020
perror_plus("seteuid");
2191
2021
}
2192
2022
}
2193
2023
2195
2025
goto end;
2196
2026
}
2197
2027
2198
ret = init_gnutls_global(pubkey, seckey, &mc);
2028
ret = init_gnutls_global(pubkey, seckey);
2199
2029
if(ret == -1){
2200
2030
fprintf_plus(stderr, "init_gnutls_global failed\n");
2201
2031
exitcode = EX_UNAVAILABLE;
2218
2048
goto end;
2219
2049
}
2220
2050
2221
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2051
if(not init_gpgme(pubkey, seckey, tempdir)){
2222
2052
fprintf_plus(stderr, "init_gpgme failed\n");
2223
2053
exitcode = EX_UNAVAILABLE;
2224
2054
goto end;
2234
2064
/* Connect directly, do not use Zeroconf */
2235
2065
/* (Mainly meant for debugging) */
2236
2066
char *address = strrchr(connect_to, ':');
2237
2238
2067
if(address == NULL){
2239
2068
fprintf_plus(stderr, "No colon in address\n");
2240
2069
exitcode = EX_USAGE;
2245
2074
goto end;
2246
2075
}
2247
2076
2248
in_port_t port;
2077
uint16_t port;
2249
2078
errno = 0;
2250
2079
tmpmax = strtoimax(address+1, &tmp, 10);
2251
2080
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2252
or tmpmax != (in_port_t)tmpmax){
2081
or tmpmax != (uint16_t)tmpmax){
2253
2082
fprintf_plus(stderr, "Bad port number\n");
2254
2083
exitcode = EX_USAGE;
2255
2084
goto end;
2259
2088
goto end;
2260
2089
}
2261
2090
2262
port = (in_port_t)tmpmax;
2091
port = (uint16_t)tmpmax;
2263
2092
*address = '\0';
2264
2093
/* Colon in address indicates IPv6 */
2265
2094
int af;
2281
2110
}
2282
2111
2283
2112
while(not quit_now){
2284
ret = start_mandos_communication(address, port, if_index, af,
2285
&mc);
2113
ret = start_mandos_communication(address, port, if_index, af);
2286
2114
if(quit_now or ret == 0){
2287
2115
break;
2288
2116
}
2314
2142
config.publish_domain = 0;
2315
2143
2316
2144
/* Allocate a new server */
2317
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2318
&config, NULL, NULL, &ret_errno);
2145
mc.server = avahi_server_new(avahi_simple_poll_get
2146
(mc.simple_poll), &config, NULL,
2147
NULL, &error);
2319
2148
2320
2149
/* Free the Avahi configuration data */
2321
2150
avahi_server_config_free(&config);
2324
2153
/* Check if creating the Avahi server object succeeded */
2325
2154
if(mc.server == NULL){
2326
2155
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2327
avahi_strerror(ret_errno));
2156
avahi_strerror(error));
2328
2157
exitcode = EX_UNAVAILABLE;
2329
2158
goto end;
2330
2159
}
2336
2165
/* Create the Avahi service browser */
2337
2166
sb = avahi_s_service_browser_new(mc.server, if_index,
2338
2167
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2339
NULL, 0, browse_callback,
2340
(void *)&mc);
2168
NULL, 0, browse_callback, NULL);
2341
2169
if(sb == NULL){
2342
2170
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2343
2171
avahi_strerror(avahi_server_errno(mc.server)));
2355
2183
fprintf_plus(stderr, "Starting Avahi loop search\n");
2356
2184
}
2357
2185
2358
ret = avahi_loop_with_timeout(simple_poll,
2359
(int)(retry_interval * 1000), &mc);
2186
ret = avahi_loop_with_timeout(mc.simple_poll,
2187
(int)(retry_interval * 1000));
2360
2188
if(debug){
2361
2189
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2362
2190
(ret == 0) ? "successfully" : "with error");
2375
2203
if(mc.server != NULL)
2376
2204
avahi_server_free(mc.server);
2377
2205
2378
if(simple_poll != NULL)
2379
avahi_simple_poll_free(simple_poll);
2206
if(mc.simple_poll != NULL)
2207
avahi_simple_poll_free(mc.simple_poll);
2380
2208
2381
2209
if(gnutls_initialized){
2382
2210
gnutls_certificate_free_credentials(mc.cred);
2399
2227
}
2400
2228
}
2401
2229
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2232
2402
2233
/* Re-raise priviliges */
2403
2234
{
2404
raise_privileges();
2405
2406
/* Run network hooks */
2407
run_network_hooks("stop", interfaces_hooks != NULL ?
2408
interfaces_hooks : "", delay);
2409
2410
/* Take down the network interfaces which were brought up */
2411
{
2412
char *interface = NULL;
2413
while((interface=argz_next(interfaces_to_take_down,
2414
interfaces_to_take_down_size,
2415
interface))){
2416
ret_errno = take_down_interface(interface);
2417
if(ret_errno != 0){
2418
errno = ret_errno;
2419
perror_plus("Failed to take down interface");
2235
errno = 0;
2236
ret = seteuid(0);
2237
if(ret == -1){
2238
perror_plus("seteuid");
2239
}
2240
2241
/* Take down the network interface */
2242
if(take_down_interface and geteuid() == 0){
2243
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2244
if(ret == -1){
2245
perror_plus("ioctl SIOCGIFFLAGS");
2246
} else if(network.ifr_flags & IFF_UP){
2247
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2248
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2249
if(ret == -1){
2250
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2420
2251
}
2421
2252
}
2422
if(debug and (interfaces_to_take_down == NULL)){
2423
fprintf_plus(stderr, "No interfaces needed to be taken"
2424
" down\n");
2253
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2254
if(ret == -1){
2255
perror_plus("close");
2425
2256
}
2426
2257
}
2427
2428
lower_privileges_permanently();
2429
}
2430
2431
free(interfaces_to_take_down);
2432
free(interfaces_hooks);
2258
}
2259
/* Lower privileges permanently */
2260
errno = 0;
2261
ret = setuid(uid);
2262
if(ret == -1){
2263
perror_plus("setuid");
2264
}
2433
2265
2434
2266
/* Removes the GPGME temp directory and all files inside */
2435
2267
if(tempdir_created){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0