(root)/mandos/release
» Revision
237.2.179
(compared to revision 237.15.1)
: plugins.d/mandos-client.c
To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 237.2.179
- compare with another revision
- download diff
- download tarball
- view history from revision 237.2.179
- Committer: Teddy Hogeborn
- Date: 2010-04-04 23:51:07 UTC
- mfrom: (24.1.147 mandos)
- mto: (237.12.2 mandos-persistent) (24.1.149 mandos) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100404235107-mjnuq6gjdeq030w7
Merge from Belorn.
- files removed:
- DBUS-API
- debian/source
- 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 © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 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
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
70
69
if_nametoindex(), IF_NAMESIZE */
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
127
126
bool debug = false;
128
127
static const char mandos_protocol_version[] = "1";
129
128
const char *argp_program_version = "mandos-client " VERSION;
130
const char *argp_program_bug_address = "<mandos@recompile.se>";
131
static const char sys_class_net[] = "/sys/class/net";
132
char *connect_to = NULL;
133
134
/* Doubly linked list that need to be circularly linked when used */
135
typedef struct server{
136
const char *ip;
137
uint16_t port;
138
AvahiIfIndex if_index;
139
int af;
140
struct timespec last_seen;
141
struct server *next;
142
struct server *prev;
143
} server;
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
144
130
145
131
/* Used for passing in values through the Avahi callback functions */
146
132
typedef struct {
151
137
gnutls_dh_params_t dh_params;
152
138
const char *priority;
153
139
gpgme_ctx_t ctx;
154
server *current_server;
155
140
} mandos_context;
156
141
157
142
/* global context so signal handler can reach it*/
158
143
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
144
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
145
":!CTYPE-X.509:+CTYPE-OPENPGP" };
162
146
163
147
sig_atomic_t quit_now = 0;
164
148
int signal_received = 0;
165
149
166
/* Function to use when printing errors */
167
void perror_plus(const char *print_text){
168
fprintf(stderr, "Mandos plugin %s: ",
169
program_invocation_short_name);
170
perror(print_text);
171
}
172
173
150
/*
174
151
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
152
* bytes. "buffer_capacity" is how much is currently allocated,
187
164
return buffer_capacity;
188
165
}
189
166
190
/* Add server to set of servers to retry periodically */
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
193
int af){
194
int ret;
195
server *new_server = malloc(sizeof(server));
196
if(new_server == NULL){
197
perror_plus("malloc");
198
return -1;
199
}
200
*new_server = (server){ .ip = strdup(ip),
201
.port = port,
202
.if_index = if_index,
203
.af = af };
204
if(new_server->ip == NULL){
205
perror_plus("strdup");
206
return -1;
207
}
208
/* Special case of first server */
209
if (mc.current_server == NULL){
210
new_server->next = new_server;
211
new_server->prev = new_server;
212
mc.current_server = new_server;
213
/* Place the new server last in the list */
214
} else {
215
new_server->next = mc.current_server;
216
new_server->prev = mc.current_server->prev;
217
new_server->prev->next = new_server;
218
mc.current_server->prev = new_server;
219
}
220
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
221
if(ret == -1){
222
perror_plus("clock_gettime");
223
return -1;
224
}
225
return 0;
226
}
227
228
167
/*
229
168
* Initialize GPGME.
230
169
*/
244
183
245
184
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
246
185
if(fd == -1){
247
perror_plus("open");
186
perror("open");
248
187
return false;
249
188
}
250
189
264
203
265
204
ret = (int)TEMP_FAILURE_RETRY(close(fd));
266
205
if(ret == -1){
267
perror_plus("close");
206
perror("close");
268
207
}
269
208
gpgme_data_release(pgp_data);
270
209
return true;
283
222
return false;
284
223
}
285
224
286
/* Set GPGME home directory for the OpenPGP engine only */
225
/* Set GPGME home directory for the OpenPGP engine only */
287
226
rc = gpgme_get_engine_info(&engine_info);
288
227
if(rc != GPG_ERR_NO_ERROR){
289
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
395
334
396
335
/* Seek back to the beginning of the GPGME plaintext data buffer */
397
336
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
398
perror_plus("gpgme_data_seek");
337
perror("gpgme_data_seek");
399
338
plaintext_length = -1;
400
339
goto decrypt_end;
401
340
}
406
345
(size_t)plaintext_length,
407
346
plaintext_capacity);
408
347
if(plaintext_capacity == 0){
409
perror_plus("incbuffer");
348
perror("incbuffer");
410
349
plaintext_length = -1;
411
350
goto decrypt_end;
412
351
}
419
358
break;
420
359
}
421
360
if(ret < 0){
422
perror_plus("gpgme_data_read");
361
perror("gpgme_data_read");
423
362
plaintext_length = -1;
424
363
goto decrypt_end;
425
364
}
482
421
}
483
422
484
423
/* OpenPGP credentials */
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
424
gnutls_certificate_allocate_credentials(&mc.cred);
486
425
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
426
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
427
from
428
-Wunreachable-code
429
*/
488
430
safer_gnutls_strerror(ret));
489
431
gnutls_global_deinit();
490
432
return -1;
645
587
tcp_sd = socket(pf, SOCK_STREAM, 0);
646
588
if(tcp_sd < 0){
647
589
int e = errno;
648
perror_plus("socket");
590
perror("socket");
649
591
errno = e;
650
592
goto mandos_end;
651
593
}
665
607
}
666
608
if(ret < 0 ){
667
609
int e = errno;
668
perror_plus("inet_pton");
610
perror("inet_pton");
669
611
errno = e;
670
612
goto mandos_end;
671
613
}
707
649
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
708
650
char interface[IF_NAMESIZE];
709
651
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
652
perror("if_indextoname");
711
653
} else {
712
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
655
ip, interface, port);
727
669
sizeof(addrstr));
728
670
}
729
671
if(pcret == NULL){
730
perror_plus("inet_ntop");
672
perror("inet_ntop");
731
673
} else {
732
674
if(strcmp(addrstr, ip) != 0){
733
675
fprintf(stderr, "Canonical address form: %s\n", addrstr);
746
688
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
747
689
}
748
690
if(ret < 0){
749
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
750
int e = errno;
751
perror_plus("connect");
752
errno = e;
753
}
691
int e = errno;
692
perror("connect");
693
errno = e;
754
694
goto mandos_end;
755
695
}
756
696
767
707
out_size - written));
768
708
if(ret == -1){
769
709
int e = errno;
770
perror_plus("write");
710
perror("write");
771
711
errno = e;
772
712
goto mandos_end;
773
713
}
798
738
goto mandos_end;
799
739
}
800
740
801
/* Spurious warning from -Wint-to-pointer-cast */
802
741
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
803
742
804
743
if(quit_now){
841
780
buffer_capacity);
842
781
if(buffer_capacity == 0){
843
782
int e = errno;
844
perror_plus("incbuffer");
783
perror("incbuffer");
845
784
errno = e;
846
785
goto mandos_end;
847
786
}
952
891
if(e == 0){
953
892
e = errno;
954
893
}
955
perror_plus("close");
894
perror("close");
956
895
}
957
896
gnutls_deinit(session);
958
errno = e;
959
897
if(quit_now){
960
errno = EINTR;
898
e = EINTR;
961
899
retval = -1;
962
900
}
901
errno = e;
963
902
}
964
903
return retval;
965
904
}
1008
947
avahi_proto_to_af(proto));
1009
948
if(ret == 0){
1010
949
avahi_simple_poll_quit(mc.simple_poll);
1011
} else {
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
1014
950
}
1015
951
}
1016
952
}
1070
1006
}
1071
1007
}
1072
1008
1073
/* Signal handler that stops main loop after SIGTERM */
1009
/* stop main loop after sigterm has been called */
1074
1010
static void handle_sigterm(int sig){
1075
1011
if(quit_now){
1076
1012
return;
1078
1014
quit_now = 1;
1079
1015
signal_received = sig;
1080
1016
int old_errno = errno;
1081
/* set main loop to exit */
1082
1017
if(mc.simple_poll != NULL){
1083
1018
avahi_simple_poll_quit(mc.simple_poll);
1084
1019
}
1085
1020
errno = old_errno;
1086
1021
}
1087
1022
1088
/*
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1092
*/
1093
int good_interface(const struct dirent *if_entry){
1094
ssize_t ssret;
1095
int ret;
1096
if(if_entry->d_name[0] == '.'){
1097
return 0;
1098
}
1099
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1100
if(s < 0){
1101
perror_plus("socket");
1102
return 0;
1103
}
1104
struct ifreq ifr;
1105
strcpy(ifr.ifr_name, if_entry->d_name);
1106
ret = ioctl(s, SIOCGIFFLAGS, &ifr);
1107
if(ret == -1){
1108
if(debug){
1109
perror_plus("ioctl SIOCGIFFLAGS");
1110
}
1111
return 0;
1112
}
1113
/* Reject the loopback device */
1114
if(ifr.ifr_flags & IFF_LOOPBACK){
1115
if(debug){
1116
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1117
if_entry->d_name);
1118
}
1119
return 0;
1120
}
1121
/* Accept point-to-point devices only if connect_to is specified */
1122
if(connect_to != NULL and (ifr.ifr_flags & IFF_POINTOPOINT)){
1123
if(debug){
1124
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1125
if_entry->d_name);
1126
}
1127
return 1;
1128
}
1129
/* Otherwise, reject non-broadcast-capable devices */
1130
if(not (ifr.ifr_flags & IFF_BROADCAST)){
1131
if(debug){
1132
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1133
if_entry->d_name);
1134
}
1135
return 0;
1136
}
1137
/* Reject non-ARP interfaces (including dummy interfaces) */
1138
if(ifr.ifr_flags & IFF_NOARP){
1139
if(debug){
1140
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1141
if_entry->d_name);
1142
}
1143
return 0;
1144
}
1145
/* Accept this device */
1146
if(debug){
1147
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1148
if_entry->d_name);
1149
}
1150
return 1;
1151
}
1152
1153
int notdotentries(const struct dirent *direntry){
1154
/* Skip "." and ".." */
1155
if(direntry->d_name[0] == '.'
1156
and (direntry->d_name[1] == '\0'
1157
or (direntry->d_name[1] == '.'
1158
and direntry->d_name[2] == '\0'))){
1159
return 0;
1160
}
1161
return 1;
1162
}
1163
1164
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1165
int ret;
1166
struct timespec now;
1167
struct timespec waited_time;
1168
intmax_t block_time;
1169
1170
while(true){
1171
if(mc.current_server == NULL){
1172
if (debug){
1173
fprintf(stderr,
1174
"Wait until first server is found. No timeout!\n");
1175
}
1176
ret = avahi_simple_poll_iterate(s, -1);
1177
} else {
1178
if (debug){
1179
fprintf(stderr, "Check current_server if we should run it,"
1180
" or wait\n");
1181
}
1182
/* the current time */
1183
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1184
if(ret == -1){
1185
perror_plus("clock_gettime");
1186
return -1;
1187
}
1188
/* Calculating in ms how long time between now and server
1189
who we visted longest time ago. Now - last seen. */
1190
waited_time.tv_sec = (now.tv_sec
1191
- mc.current_server->last_seen.tv_sec);
1192
waited_time.tv_nsec = (now.tv_nsec
1193
- mc.current_server->last_seen.tv_nsec);
1194
/* total time is 10s/10,000ms.
1195
Converting to s from ms by dividing by 1,000,
1196
and ns to ms by dividing by 1,000,000. */
1197
block_time = ((retry_interval
1198
- ((intmax_t)waited_time.tv_sec * 1000))
1199
- ((intmax_t)waited_time.tv_nsec / 1000000));
1200
1201
if (debug){
1202
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1203
}
1204
1205
if(block_time <= 0){
1206
ret = start_mandos_communication(mc.current_server->ip,
1207
mc.current_server->port,
1208
mc.current_server->if_index,
1209
mc.current_server->af);
1210
if(ret == 0){
1211
avahi_simple_poll_quit(mc.simple_poll);
1212
return 0;
1213
}
1214
ret = clock_gettime(CLOCK_MONOTONIC,
1215
&mc.current_server->last_seen);
1216
if(ret == -1){
1217
perror_plus("clock_gettime");
1218
return -1;
1219
}
1220
mc.current_server = mc.current_server->next;
1221
block_time = 0; /* Call avahi to find new Mandos
1222
servers, but don't block */
1223
}
1224
1225
ret = avahi_simple_poll_iterate(s, (int)block_time);
1226
}
1227
if(ret != 0){
1228
if (ret > 0 or errno != EINTR) {
1229
return (ret != 1) ? ret : 0;
1230
}
1231
}
1232
}
1233
}
1234
1235
1023
int main(int argc, char *argv[]){
1236
1024
AvahiSServiceBrowser *sb = NULL;
1237
1025
int error;
1239
1027
intmax_t tmpmax;
1240
1028
char *tmp;
1241
1029
int exitcode = EXIT_SUCCESS;
1242
const char *interface = "";
1030
const char *interface = "eth0";
1243
1031
struct ifreq network;
1244
1032
int sd = -1;
1245
1033
bool take_down_interface = false;
1246
1034
uid_t uid;
1247
1035
gid_t gid;
1036
char *connect_to = NULL;
1248
1037
char tempdir[] = "/tmp/mandosXXXXXX";
1249
1038
bool tempdir_created = false;
1250
1039
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1254
1043
bool gnutls_initialized = false;
1255
1044
bool gpgme_initialized = false;
1256
1045
float delay = 2.5f;
1257
double retry_interval = 10; /* 10s between trying a server and
1258
retrying the same server again */
1259
1046
1260
1047
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1261
1048
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1267
1054
errno = 0;
1268
1055
ret = setgid(gid);
1269
1056
if(ret == -1){
1270
perror_plus("setgid");
1057
perror("setgid");
1271
1058
}
1272
1059
1273
1060
/* Lower user privileges (temporarily) */
1274
1061
errno = 0;
1275
1062
ret = seteuid(uid);
1276
1063
if(ret == -1){
1277
perror_plus("seteuid");
1064
perror("seteuid");
1278
1065
}
1279
1066
1280
1067
if(quit_now){
1315
1102
.arg = "SECONDS",
1316
1103
.doc = "Maximum delay to wait for interface startup",
1317
1104
.group = 2 },
1318
{ .name = "retry", .key = 132,
1319
.arg = "SECONDS",
1320
.doc = "Retry interval used when denied by the mandos server",
1321
.group = 2 },
1322
1105
/*
1323
1106
* These reproduce what we would get without ARGP_NO_HELP
1324
1107
*/
1368
1151
if(errno != 0 or tmp == arg or *tmp != '\0'){
1369
1152
argp_error(state, "Bad delay");
1370
1153
}
1371
case 132: /* --retry */
1372
errno = 0;
1373
retry_interval = strtod(arg, &tmp);
1374
if(errno != 0 or tmp == arg or *tmp != '\0'
1375
or (retry_interval * 1000) > INT_MAX
1376
or retry_interval < 0){
1377
argp_error(state, "Bad retry interval");
1378
}
1379
1154
break;
1380
1155
/*
1381
1156
* These reproduce what we would get without ARGP_NO_HELP
1409
1184
case ENOMEM:
1410
1185
default:
1411
1186
errno = ret;
1412
perror_plus("argp_parse");
1187
perror("argp_parse");
1413
1188
exitcode = EX_OSERR;
1414
1189
goto end;
1415
1190
case EINVAL:
1417
1192
goto end;
1418
1193
}
1419
1194
}
1420
1421
{
1422
/* Work around Debian bug #633582:
1423
<http://bugs.debian.org/633582> */
1424
struct stat st;
1425
1426
/* Re-raise priviliges */
1427
errno = 0;
1428
ret = seteuid(0);
1429
if(ret == -1){
1430
perror_plus("seteuid");
1431
}
1432
1433
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1434
int seckey_fd = open(seckey, O_RDONLY);
1435
if(seckey_fd == -1){
1436
perror_plus("open");
1437
} else {
1438
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1439
if(ret == -1){
1440
perror_plus("fstat");
1441
} else {
1442
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1443
ret = fchown(seckey_fd, uid, gid);
1444
if(ret == -1){
1445
perror_plus("fchown");
1446
}
1447
}
1448
}
1449
TEMP_FAILURE_RETRY(close(seckey_fd));
1450
}
1451
}
1452
1453
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1454
int pubkey_fd = open(pubkey, O_RDONLY);
1455
if(pubkey_fd == -1){
1456
perror_plus("open");
1457
} else {
1458
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1459
if(ret == -1){
1460
perror_plus("fstat");
1461
} else {
1462
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1463
ret = fchown(pubkey_fd, uid, gid);
1464
if(ret == -1){
1465
perror_plus("fchown");
1466
}
1467
}
1468
}
1469
TEMP_FAILURE_RETRY(close(pubkey_fd));
1470
}
1471
}
1472
1473
/* Lower privileges */
1474
errno = 0;
1475
ret = seteuid(uid);
1476
if(ret == -1){
1477
perror_plus("seteuid");
1478
}
1479
}
1480
1195
1481
1196
if(not debug){
1482
1197
avahi_set_log_function(empty_log);
1483
1198
}
1484
1485
if(interface[0] == '\0'){
1486
struct dirent **direntries;
1487
ret = scandir(sys_class_net, &direntries, good_interface,
1488
alphasort);
1489
if(ret >= 1){
1490
/* Pick the first good interface */
1491
interface = strdup(direntries[0]->d_name);
1492
if(debug){
1493
fprintf(stderr, "Using interface \"%s\"\n", interface);
1494
}
1495
if(interface == NULL){
1496
perror_plus("malloc");
1497
free(direntries);
1498
exitcode = EXIT_FAILURE;
1499
goto end;
1500
}
1501
free(direntries);
1502
} else {
1503
free(direntries);
1504
fprintf(stderr, "Could not find a network interface\n");
1505
exitcode = EXIT_FAILURE;
1506
goto end;
1507
}
1508
}
1509
1199
1510
1200
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1511
1201
from the signal handler */
1521
1211
sigemptyset(&sigterm_action.sa_mask);
1522
1212
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1523
1213
if(ret == -1){
1524
perror_plus("sigaddset");
1214
perror("sigaddset");
1525
1215
exitcode = EX_OSERR;
1526
1216
goto end;
1527
1217
}
1528
1218
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1529
1219
if(ret == -1){
1530
perror_plus("sigaddset");
1220
perror("sigaddset");
1531
1221
exitcode = EX_OSERR;
1532
1222
goto end;
1533
1223
}
1534
1224
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1535
1225
if(ret == -1){
1536
perror_plus("sigaddset");
1226
perror("sigaddset");
1537
1227
exitcode = EX_OSERR;
1538
1228
goto end;
1539
1229
}
1543
1233
*/
1544
1234
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1545
1235
if(ret == -1){
1546
perror_plus("sigaction");
1236
perror("sigaction");
1547
1237
return EX_OSERR;
1548
1238
}
1549
1239
if(old_sigterm_action.sa_handler != SIG_IGN){
1550
1240
ret = sigaction(SIGINT, &sigterm_action, NULL);
1551
1241
if(ret == -1){
1552
perror_plus("sigaction");
1242
perror("sigaction");
1553
1243
exitcode = EX_OSERR;
1554
1244
goto end;
1555
1245
}
1556
1246
}
1557
1247
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1558
1248
if(ret == -1){
1559
perror_plus("sigaction");
1249
perror("sigaction");
1560
1250
return EX_OSERR;
1561
1251
}
1562
1252
if(old_sigterm_action.sa_handler != SIG_IGN){
1563
1253
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1564
1254
if(ret == -1){
1565
perror_plus("sigaction");
1255
perror("sigaction");
1566
1256
exitcode = EX_OSERR;
1567
1257
goto end;
1568
1258
}
1569
1259
}
1570
1260
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1571
1261
if(ret == -1){
1572
perror_plus("sigaction");
1262
perror("sigaction");
1573
1263
return EX_OSERR;
1574
1264
}
1575
1265
if(old_sigterm_action.sa_handler != SIG_IGN){
1576
1266
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1577
1267
if(ret == -1){
1578
perror_plus("sigaction");
1268
perror("sigaction");
1579
1269
exitcode = EX_OSERR;
1580
1270
goto end;
1581
1271
}
1582
1272
}
1583
1273
1584
1274
/* If the interface is down, bring it up */
1585
if(strcmp(interface, "none") != 0){
1275
if(interface[0] != '\0'){
1586
1276
if_index = (AvahiIfIndex) if_nametoindex(interface);
1587
1277
if(if_index == 0){
1588
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1598
1288
errno = 0;
1599
1289
ret = seteuid(0);
1600
1290
if(ret == -1){
1601
perror_plus("seteuid");
1291
perror("seteuid");
1602
1292
}
1603
1293
1604
1294
#ifdef __linux__
1608
1298
bool restore_loglevel = true;
1609
1299
if(ret == -1){
1610
1300
restore_loglevel = false;
1611
perror_plus("klogctl");
1301
perror("klogctl");
1612
1302
}
1613
1303
#endif /* __linux__ */
1614
1304
1615
1305
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1616
1306
if(sd < 0){
1617
perror_plus("socket");
1307
perror("socket");
1618
1308
exitcode = EX_OSERR;
1619
1309
#ifdef __linux__
1620
1310
if(restore_loglevel){
1621
1311
ret = klogctl(7, NULL, 0);
1622
1312
if(ret == -1){
1623
perror_plus("klogctl");
1313
perror("klogctl");
1624
1314
}
1625
1315
}
1626
1316
#endif /* __linux__ */
1628
1318
errno = 0;
1629
1319
ret = seteuid(uid);
1630
1320
if(ret == -1){
1631
perror_plus("seteuid");
1321
perror("seteuid");
1632
1322
}
1633
1323
goto end;
1634
1324
}
1635
1325
strcpy(network.ifr_name, interface);
1636
1326
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1637
1327
if(ret == -1){
1638
perror_plus("ioctl SIOCGIFFLAGS");
1328
perror("ioctl SIOCGIFFLAGS");
1639
1329
#ifdef __linux__
1640
1330
if(restore_loglevel){
1641
1331
ret = klogctl(7, NULL, 0);
1642
1332
if(ret == -1){
1643
perror_plus("klogctl");
1333
perror("klogctl");
1644
1334
}
1645
1335
}
1646
1336
#endif /* __linux__ */
1649
1339
errno = 0;
1650
1340
ret = seteuid(uid);
1651
1341
if(ret == -1){
1652
perror_plus("seteuid");
1342
perror("seteuid");
1653
1343
}
1654
1344
goto end;
1655
1345
}
1659
1349
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1660
1350
if(ret == -1){
1661
1351
take_down_interface = false;
1662
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1352
perror("ioctl SIOCSIFFLAGS");
1663
1353
exitcode = EX_OSERR;
1664
1354
#ifdef __linux__
1665
1355
if(restore_loglevel){
1666
1356
ret = klogctl(7, NULL, 0);
1667
1357
if(ret == -1){
1668
perror_plus("klogctl");
1358
perror("klogctl");
1669
1359
}
1670
1360
}
1671
1361
#endif /* __linux__ */
1673
1363
errno = 0;
1674
1364
ret = seteuid(uid);
1675
1365
if(ret == -1){
1676
perror_plus("seteuid");
1366
perror("seteuid");
1677
1367
}
1678
1368
goto end;
1679
1369
}
1680
1370
}
1681
/* Sleep checking until interface is running.
1682
Check every 0.25s, up to total time of delay */
1371
/* sleep checking until interface is running */
1683
1372
for(int i=0; i < delay * 4; i++){
1684
1373
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1685
1374
if(ret == -1){
1686
perror_plus("ioctl SIOCGIFFLAGS");
1375
perror("ioctl SIOCGIFFLAGS");
1687
1376
} else if(network.ifr_flags & IFF_RUNNING){
1688
1377
break;
1689
1378
}
1690
1379
struct timespec sleeptime = { .tv_nsec = 250000000 };
1691
1380
ret = nanosleep(&sleeptime, NULL);
1692
1381
if(ret == -1 and errno != EINTR){
1693
perror_plus("nanosleep");
1382
perror("nanosleep");
1694
1383
}
1695
1384
}
1696
1385
if(not take_down_interface){
1697
1386
/* We won't need the socket anymore */
1698
1387
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1699
1388
if(ret == -1){
1700
perror_plus("close");
1389
perror("close");
1701
1390
}
1702
1391
}
1703
1392
#ifdef __linux__
1705
1394
/* Restores kernel loglevel to default */
1706
1395
ret = klogctl(7, NULL, 0);
1707
1396
if(ret == -1){
1708
perror_plus("klogctl");
1397
perror("klogctl");
1709
1398
}
1710
1399
}
1711
1400
#endif /* __linux__ */
1715
1404
/* Lower privileges */
1716
1405
ret = seteuid(uid);
1717
1406
if(ret == -1){
1718
perror_plus("seteuid");
1407
perror("seteuid");
1719
1408
}
1720
1409
} else {
1721
1410
/* Lower privileges permanently */
1722
1411
ret = setuid(uid);
1723
1412
if(ret == -1){
1724
perror_plus("setuid");
1413
perror("setuid");
1725
1414
}
1726
1415
}
1727
1416
}
1743
1432
goto end;
1744
1433
}
1745
1434
1435
tempdir_created = true;
1746
1436
if(mkdtemp(tempdir) == NULL){
1747
perror_plus("mkdtemp");
1437
tempdir_created = false;
1438
perror("mkdtemp");
1748
1439
goto end;
1749
1440
}
1750
tempdir_created = true;
1751
1441
1752
1442
if(quit_now){
1753
1443
goto end;
1795
1485
1796
1486
port = (uint16_t)tmpmax;
1797
1487
*address = '\0';
1488
address = connect_to;
1798
1489
/* Colon in address indicates IPv6 */
1799
1490
int af;
1800
if(strchr(connect_to, ':') != NULL){
1491
if(strchr(address, ':') != NULL){
1801
1492
af = AF_INET6;
1802
/* Accept [] around IPv6 address - see RFC 5952 */
1803
if(connect_to[0] == '[' and address[-1] == ']')
1804
{
1805
connect_to++;
1806
address[-1] = '\0';
1807
}
1808
1493
} else {
1809
1494
af = AF_INET;
1810
1495
}
1811
address = connect_to;
1812
1496
1813
1497
if(quit_now){
1814
1498
goto end;
1815
1499
}
1816
1500
1817
while(not quit_now){
1818
ret = start_mandos_communication(address, port, if_index, af);
1819
if(quit_now or ret == 0){
1820
break;
1821
}
1822
if(debug){
1823
fprintf(stderr, "Retrying in %d seconds\n",
1824
(int)retry_interval);
1825
}
1826
sleep((int)retry_interval);
1827
}
1828
1829
if (not quit_now){
1501
ret = start_mandos_communication(address, port, if_index, af);
1502
if(ret < 0){
1503
switch(errno){
1504
case ENETUNREACH:
1505
case EHOSTDOWN:
1506
case EHOSTUNREACH:
1507
exitcode = EX_NOHOST;
1508
break;
1509
case EINVAL:
1510
exitcode = EX_USAGE;
1511
break;
1512
case EIO:
1513
exitcode = EX_IOERR;
1514
break;
1515
case EPROTO:
1516
exitcode = EX_PROTOCOL;
1517
break;
1518
default:
1519
exitcode = EX_OSERR;
1520
break;
1521
}
1522
} else {
1830
1523
exitcode = EXIT_SUCCESS;
1831
1524
}
1832
1833
1525
goto end;
1834
1526
}
1835
1527
1887
1579
if(debug){
1888
1580
fprintf(stderr, "Starting Avahi loop search\n");
1889
1581
}
1890
1891
ret = avahi_loop_with_timeout(mc.simple_poll,
1892
(int)(retry_interval * 1000));
1893
if(debug){
1894
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1895
(ret == 0) ? "successfully" : "with error");
1896
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
1897
1584
1898
1585
end:
1899
1586
1920
1607
if(gpgme_initialized){
1921
1608
gpgme_release(mc.ctx);
1922
1609
}
1923
1924
/* Cleans up the circular linked list of Mandos servers the client
1925
has seen */
1926
if(mc.current_server != NULL){
1927
mc.current_server->prev->next = NULL;
1928
while(mc.current_server != NULL){
1929
server *next = mc.current_server->next;
1930
free(mc.current_server);
1931
mc.current_server = next;
1932
}
1933
}
1934
1610
1935
1611
/* Take down the network interface */
1936
1612
if(take_down_interface){
1938
1614
errno = 0;
1939
1615
ret = seteuid(0);
1940
1616
if(ret == -1){
1941
perror_plus("seteuid");
1617
perror("seteuid");
1942
1618
}
1943
1619
if(geteuid() == 0){
1944
1620
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1945
1621
if(ret == -1){
1946
perror_plus("ioctl SIOCGIFFLAGS");
1622
perror("ioctl SIOCGIFFLAGS");
1947
1623
} else if(network.ifr_flags & IFF_UP) {
1948
1624
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1949
1625
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1950
1626
if(ret == -1){
1951
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1627
perror("ioctl SIOCSIFFLAGS");
1952
1628
}
1953
1629
}
1954
1630
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1955
1631
if(ret == -1){
1956
perror_plus("close");
1632
perror("close");
1957
1633
}
1958
1634
/* Lower privileges permanently */
1959
1635
errno = 0;
1960
1636
ret = setuid(uid);
1961
1637
if(ret == -1){
1962
perror_plus("setuid");
1638
perror("setuid");
1963
1639
}
1964
1640
}
1965
1641
}
1966
1642
1967
/* Removes the GPGME temp directory and all files inside */
1643
/* Removes the temp directory used by GPGME */
1968
1644
if(tempdir_created){
1969
struct dirent **direntries = NULL;
1970
struct dirent *direntry = NULL;
1971
int numentries = scandir(tempdir, &direntries, notdotentries,
1972
alphasort);
1973
if (numentries > 0){
1974
for(int i = 0; i < numentries; i++){
1975
direntry = direntries[i];
1645
DIR *d;
1646
struct dirent *direntry;
1647
d = opendir(tempdir);
1648
if(d == NULL){
1649
if(errno != ENOENT){
1650
perror("opendir");
1651
}
1652
} else {
1653
while(true){
1654
direntry = readdir(d);
1655
if(direntry == NULL){
1656
break;
1657
}
1658
/* Skip "." and ".." */
1659
if(direntry->d_name[0] == '.'
1660
and (direntry->d_name[1] == '\0'
1661
or (direntry->d_name[1] == '.'
1662
and direntry->d_name[2] == '\0'))){
1663
continue;
1664
}
1976
1665
char *fullname = NULL;
1977
1666
ret = asprintf(&fullname, "%s/%s", tempdir,
1978
1667
direntry->d_name);
1979
1668
if(ret < 0){
1980
perror_plus("asprintf");
1669
perror("asprintf");
1981
1670
continue;
1982
1671
}
1983
1672
ret = remove(fullname);
1987
1676
}
1988
1677
free(fullname);
1989
1678
}
1990
}
1991
1992
/* need to clean even if 0 because man page doesn't specify */
1993
free(direntries);
1994
if (numentries == -1){
1995
perror_plus("scandir");
1679
closedir(d);
1996
1680
}
1997
1681
ret = rmdir(tempdir);
1998
1682
if(ret == -1 and errno != ENOENT){
1999
perror_plus("rmdir");
1683
perror("rmdir");
2000
1684
}
2001
1685
}
2002
1686
2007
1691
&old_sigterm_action,
2008
1692
NULL));
2009
1693
if(ret == -1){
2010
perror_plus("sigaction");
1694
perror("sigaction");
2011
1695
}
2012
1696
do {
2013
1697
ret = raise(signal_received);
2014
1698
} while(ret != 0 and errno == EINTR);
2015
1699
if(ret != 0){
2016
perror_plus("raise");
1700
perror("raise");
2017
1701
abort();
2018
1702
}
2019
1703
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0