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- Committer: teddy at bsnet
- Date: 2011-03-21 19:34:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20110321193439-lkj3kwvhmujd8lwv
* plugins.d/mandos-client.c (good_interface): Reject non-ARP
interfaces.
interfaces.
- files removed:
- debian/source/local-options
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
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 */
65
#include <errno.h> /* perror(), errno */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
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>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
131
130
static const char sys_class_net[] = "/sys/class/net";
132
131
char *connect_to = NULL;
133
132
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;
144
145
133
/* Used for passing in values through the Avahi callback functions */
146
134
typedef struct {
147
135
AvahiSimplePoll *simple_poll;
151
139
gnutls_dh_params_t dh_params;
152
140
const char *priority;
153
141
gpgme_ctx_t ctx;
154
server *current_server;
155
142
} mandos_context;
156
143
157
144
/* global context so signal handler can reach it*/
158
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
146
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
162
148
163
149
sig_atomic_t quit_now = 0;
164
150
int signal_received = 0;
165
151
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
152
/*
174
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
154
* bytes. "buffer_capacity" is how much is currently allocated,
187
166
return buffer_capacity;
188
167
}
189
168
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
169
/*
229
170
* Initialize GPGME.
230
171
*/
244
185
245
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
246
187
if(fd == -1){
247
perror_plus("open");
188
perror("open");
248
189
return false;
249
190
}
250
191
264
205
265
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
266
207
if(ret == -1){
267
perror_plus("close");
208
perror("close");
268
209
}
269
210
gpgme_data_release(pgp_data);
270
211
return true;
283
224
return false;
284
225
}
285
226
286
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
287
228
rc = gpgme_get_engine_info(&engine_info);
288
229
if(rc != GPG_ERR_NO_ERROR){
289
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
395
336
396
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
397
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
398
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
399
340
plaintext_length = -1;
400
341
goto decrypt_end;
401
342
}
406
347
(size_t)plaintext_length,
407
348
plaintext_capacity);
408
349
if(plaintext_capacity == 0){
409
perror_plus("incbuffer");
350
perror("incbuffer");
410
351
plaintext_length = -1;
411
352
goto decrypt_end;
412
353
}
419
360
break;
420
361
}
421
362
if(ret < 0){
422
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
423
364
plaintext_length = -1;
424
365
goto decrypt_end;
425
366
}
482
423
}
483
424
484
425
/* OpenPGP credentials */
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
486
427
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
488
432
safer_gnutls_strerror(ret));
489
433
gnutls_global_deinit();
490
434
return -1;
645
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
646
590
if(tcp_sd < 0){
647
591
int e = errno;
648
perror_plus("socket");
592
perror("socket");
649
593
errno = e;
650
594
goto mandos_end;
651
595
}
665
609
}
666
610
if(ret < 0 ){
667
611
int e = errno;
668
perror_plus("inet_pton");
612
perror("inet_pton");
669
613
errno = e;
670
614
goto mandos_end;
671
615
}
707
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
708
652
char interface[IF_NAMESIZE];
709
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
654
perror("if_indextoname");
711
655
} else {
712
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
657
ip, interface, port);
727
671
sizeof(addrstr));
728
672
}
729
673
if(pcret == NULL){
730
perror_plus("inet_ntop");
674
perror("inet_ntop");
731
675
} else {
732
676
if(strcmp(addrstr, ip) != 0){
733
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
748
692
if(ret < 0){
749
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
750
694
int e = errno;
751
perror_plus("connect");
695
perror("connect");
752
696
errno = e;
753
697
}
754
698
goto mandos_end;
767
711
out_size - written));
768
712
if(ret == -1){
769
713
int e = errno;
770
perror_plus("write");
714
perror("write");
771
715
errno = e;
772
716
goto mandos_end;
773
717
}
798
742
goto mandos_end;
799
743
}
800
744
801
/* Spurious warning from -Wint-to-pointer-cast */
802
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
803
746
804
747
if(quit_now){
841
784
buffer_capacity);
842
785
if(buffer_capacity == 0){
843
786
int e = errno;
844
perror_plus("incbuffer");
787
perror("incbuffer");
845
788
errno = e;
846
789
goto mandos_end;
847
790
}
952
895
if(e == 0){
953
896
e = errno;
954
897
}
955
perror_plus("close");
898
perror("close");
956
899
}
957
900
gnutls_deinit(session);
958
errno = e;
959
901
if(quit_now){
960
errno = EINTR;
902
e = EINTR;
961
903
retval = -1;
962
904
}
905
errno = e;
963
906
}
964
907
return retval;
965
908
}
1008
951
avahi_proto_to_af(proto));
1009
952
if(ret == 0){
1010
953
avahi_simple_poll_quit(mc.simple_poll);
1011
} else {
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
1014
954
}
1015
955
}
1016
956
}
1070
1010
}
1071
1011
}
1072
1012
1073
/* Signal handler that stops main loop after SIGTERM */
1013
/* stop main loop after sigterm has been called */
1074
1014
static void handle_sigterm(int sig){
1075
1015
if(quit_now){
1076
1016
return;
1078
1018
quit_now = 1;
1079
1019
signal_received = sig;
1080
1020
int old_errno = errno;
1081
/* set main loop to exit */
1082
1021
if(mc.simple_poll != NULL){
1083
1022
avahi_simple_poll_quit(mc.simple_poll);
1084
1023
}
1085
1024
errno = old_errno;
1086
1025
}
1087
1026
1088
bool get_flags(const char *ifname, struct ifreq *ifr){
1089
int ret;
1090
1091
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1092
if(s < 0){
1093
perror_plus("socket");
1094
return false;
1095
}
1096
strcpy(ifr->ifr_name, ifname);
1097
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1098
if(ret == -1){
1027
/*
1028
* This function determines if a directory entry in /sys/class/net
1029
* corresponds to an acceptable network device.
1030
* (This function is passed to scandir(3) as a filter function.)
1031
*/
1032
int good_interface(const struct dirent *if_entry){
1033
ssize_t ssret;
1034
char *flagname = NULL;
1035
if(if_entry->d_name[0] == '.'){
1036
return 0;
1037
}
1038
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1039
if_entry->d_name);
1040
if(ret < 0){
1041
perror("asprintf");
1042
return 0;
1043
}
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
if(flags_fd == -1){
1046
perror("open");
1047
free(flagname);
1048
return 0;
1049
}
1050
free(flagname);
1051
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1052
/* read line from flags_fd */
1053
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1054
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1055
flagstring[(size_t)to_read] = '\0';
1056
if(flagstring == NULL){
1057
perror("malloc");
1058
close(flags_fd);
1059
return 0;
1060
}
1061
while(to_read > 0){
1062
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1063
(size_t)to_read));
1064
if(ssret == -1){
1065
perror("read");
1066
free(flagstring);
1067
close(flags_fd);
1068
return 0;
1069
}
1070
to_read -= ssret;
1071
if(ssret == 0){
1072
break;
1073
}
1074
}
1075
close(flags_fd);
1076
intmax_t tmpmax;
1077
char *tmp;
1078
errno = 0;
1079
tmpmax = strtoimax(flagstring, &tmp, 0);
1080
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1081
and not (isspace(*tmp)))
1082
or tmpmax != (ifreq_flags)tmpmax){
1099
1083
if(debug){
1100
perror_plus("ioctl SIOCGIFFLAGS");
1084
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1085
flagstring, if_entry->d_name);
1101
1086
}
1102
return false;
1087
free(flagstring);
1088
return 0;
1103
1089
}
1104
return true;
1105
}
1106
1107
bool good_flags(const char *ifname, const struct ifreq *ifr){
1108
1090
free(flagstring);
1091
ifreq_flags flags = (ifreq_flags)tmpmax;
1109
1092
/* Reject the loopback device */
1110
if(ifr->ifr_flags & IFF_LOOPBACK){
1093
if(flags & IFF_LOOPBACK){
1111
1094
if(debug){
1112
1095
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1113
ifname);
1096
if_entry->d_name);
1114
1097
}
1115
return false;
1098
return 0;
1116
1099
}
1117
1100
/* Accept point-to-point devices only if connect_to is specified */
1118
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1101
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1119
1102
if(debug){
1120
1103
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1121
ifname);
1104
if_entry->d_name);
1122
1105
}
1123
return true;
1106
return 1;
1124
1107
}
1125
1108
/* Otherwise, reject non-broadcast-capable devices */
1126
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1109
if(not (flags & IFF_BROADCAST)){
1127
1110
if(debug){
1128
1111
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1129
ifname);
1112
if_entry->d_name);
1130
1113
}
1131
return false;
1114
return 0;
1132
1115
}
1133
1116
/* Reject non-ARP interfaces (including dummy interfaces) */
1134
if(ifr->ifr_flags & IFF_NOARP){
1117
if(flags & IFF_NOARP){
1135
1118
if(debug){
1136
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1119
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1120
if_entry->d_name);
1137
1121
}
1138
return false;
1122
return 0;
1139
1123
}
1140
1141
1124
/* Accept this device */
1142
1125
if(debug){
1143
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1144
}
1145
return true;
1146
}
1147
1148
/*
1149
* This function determines if a directory entry in /sys/class/net
1150
* corresponds to an acceptable network device.
1151
* (This function is passed to scandir(3) as a filter function.)
1152
*/
1153
int good_interface(const struct dirent *if_entry){
1154
int ret;
1155
if(if_entry->d_name[0] == '.'){
1156
return 0;
1157
}
1158
struct ifreq ifr;
1159
1160
if(not get_flags(if_entry->d_name, &ifr)){
1161
return 0;
1162
}
1163
1164
if(not good_flags(if_entry->d_name, &ifr)){
1165
return 0;
1166
}
1167
return 1;
1168
}
1169
1170
int notdotentries(const struct dirent *direntry){
1171
/* Skip "." and ".." */
1172
if(direntry->d_name[0] == '.'
1173
and (direntry->d_name[1] == '\0'
1174
or (direntry->d_name[1] == '.'
1175
and direntry->d_name[2] == '\0'))){
1176
return 0;
1177
}
1178
return 1;
1179
}
1180
1181
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1182
int ret;
1183
struct timespec now;
1184
struct timespec waited_time;
1185
intmax_t block_time;
1186
1187
while(true){
1188
if(mc.current_server == NULL){
1189
if (debug){
1190
fprintf(stderr,
1191
"Wait until first server is found. No timeout!\n");
1192
}
1193
ret = avahi_simple_poll_iterate(s, -1);
1194
} else {
1195
if (debug){
1196
fprintf(stderr, "Check current_server if we should run it,"
1197
" or wait\n");
1198
}
1199
/* the current time */
1200
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1201
if(ret == -1){
1202
perror_plus("clock_gettime");
1203
return -1;
1204
}
1205
/* Calculating in ms how long time between now and server
1206
who we visted longest time ago. Now - last seen. */
1207
waited_time.tv_sec = (now.tv_sec
1208
- mc.current_server->last_seen.tv_sec);
1209
waited_time.tv_nsec = (now.tv_nsec
1210
- mc.current_server->last_seen.tv_nsec);
1211
/* total time is 10s/10,000ms.
1212
Converting to s from ms by dividing by 1,000,
1213
and ns to ms by dividing by 1,000,000. */
1214
block_time = ((retry_interval
1215
- ((intmax_t)waited_time.tv_sec * 1000))
1216
- ((intmax_t)waited_time.tv_nsec / 1000000));
1217
1218
if (debug){
1219
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1220
}
1221
1222
if(block_time <= 0){
1223
ret = start_mandos_communication(mc.current_server->ip,
1224
mc.current_server->port,
1225
mc.current_server->if_index,
1226
mc.current_server->af);
1227
if(ret == 0){
1228
avahi_simple_poll_quit(mc.simple_poll);
1229
return 0;
1230
}
1231
ret = clock_gettime(CLOCK_MONOTONIC,
1232
&mc.current_server->last_seen);
1233
if(ret == -1){
1234
perror_plus("clock_gettime");
1235
return -1;
1236
}
1237
mc.current_server = mc.current_server->next;
1238
block_time = 0; /* Call avahi to find new Mandos
1239
servers, but don't block */
1240
}
1241
1242
ret = avahi_simple_poll_iterate(s, (int)block_time);
1243
}
1244
if(ret != 0){
1245
if (ret > 0 or errno != EINTR) {
1246
return (ret != 1) ? ret : 0;
1247
}
1248
}
1249
}
1126
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1127
if_entry->d_name);
1128
}
1129
return 1;
1250
1130
}
1251
1131
1252
1132
int main(int argc, char *argv[]){
1271
1151
bool gnutls_initialized = false;
1272
1152
bool gpgme_initialized = false;
1273
1153
float delay = 2.5f;
1274
double retry_interval = 10; /* 10s between trying a server and
1275
retrying the same server again */
1276
1154
1277
1155
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1278
1156
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1284
1162
errno = 0;
1285
1163
ret = setgid(gid);
1286
1164
if(ret == -1){
1287
perror_plus("setgid");
1165
perror("setgid");
1288
1166
}
1289
1167
1290
1168
/* Lower user privileges (temporarily) */
1291
1169
errno = 0;
1292
1170
ret = seteuid(uid);
1293
1171
if(ret == -1){
1294
perror_plus("seteuid");
1172
perror("seteuid");
1295
1173
}
1296
1174
1297
1175
if(quit_now){
1332
1210
.arg = "SECONDS",
1333
1211
.doc = "Maximum delay to wait for interface startup",
1334
1212
.group = 2 },
1335
{ .name = "retry", .key = 132,
1336
.arg = "SECONDS",
1337
.doc = "Retry interval used when denied by the mandos server",
1338
.group = 2 },
1339
1213
/*
1340
1214
* These reproduce what we would get without ARGP_NO_HELP
1341
1215
*/
1385
1259
if(errno != 0 or tmp == arg or *tmp != '\0'){
1386
1260
argp_error(state, "Bad delay");
1387
1261
}
1388
case 132: /* --retry */
1389
errno = 0;
1390
retry_interval = strtod(arg, &tmp);
1391
if(errno != 0 or tmp == arg or *tmp != '\0'
1392
or (retry_interval * 1000) > INT_MAX
1393
or retry_interval < 0){
1394
argp_error(state, "Bad retry interval");
1395
}
1396
1262
break;
1397
1263
/*
1398
1264
* These reproduce what we would get without ARGP_NO_HELP
1426
1292
case ENOMEM:
1427
1293
default:
1428
1294
errno = ret;
1429
perror_plus("argp_parse");
1295
perror("argp_parse");
1430
1296
exitcode = EX_OSERR;
1431
1297
goto end;
1432
1298
case EINVAL:
1434
1300
goto end;
1435
1301
}
1436
1302
}
1437
1438
{
1439
/* Work around Debian bug #633582:
1440
<http://bugs.debian.org/633582> */
1441
struct stat st;
1442
1443
/* Re-raise priviliges */
1444
errno = 0;
1445
ret = seteuid(0);
1446
if(ret == -1){
1447
perror_plus("seteuid");
1448
}
1449
1450
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1451
int seckey_fd = open(seckey, O_RDONLY);
1452
if(seckey_fd == -1){
1453
perror_plus("open");
1454
} else {
1455
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1456
if(ret == -1){
1457
perror_plus("fstat");
1458
} else {
1459
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1460
ret = fchown(seckey_fd, uid, gid);
1461
if(ret == -1){
1462
perror_plus("fchown");
1463
}
1464
}
1465
}
1466
TEMP_FAILURE_RETRY(close(seckey_fd));
1467
}
1468
}
1469
1470
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1471
int pubkey_fd = open(pubkey, O_RDONLY);
1472
if(pubkey_fd == -1){
1473
perror_plus("open");
1474
} else {
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1476
if(ret == -1){
1477
perror_plus("fstat");
1478
} else {
1479
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1480
ret = fchown(pubkey_fd, uid, gid);
1481
if(ret == -1){
1482
perror_plus("fchown");
1483
}
1484
}
1485
}
1486
TEMP_FAILURE_RETRY(close(pubkey_fd));
1487
}
1488
}
1489
1490
/* Lower privileges */
1491
errno = 0;
1492
ret = seteuid(uid);
1493
if(ret == -1){
1494
perror_plus("seteuid");
1495
}
1496
}
1497
1303
1498
1304
if(not debug){
1499
1305
avahi_set_log_function(empty_log);
1510
1316
fprintf(stderr, "Using interface \"%s\"\n", interface);
1511
1317
}
1512
1318
if(interface == NULL){
1513
perror_plus("malloc");
1319
perror("malloc");
1514
1320
free(direntries);
1515
1321
exitcode = EXIT_FAILURE;
1516
1322
goto end;
1538
1344
sigemptyset(&sigterm_action.sa_mask);
1539
1345
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1540
1346
if(ret == -1){
1541
perror_plus("sigaddset");
1347
perror("sigaddset");
1542
1348
exitcode = EX_OSERR;
1543
1349
goto end;
1544
1350
}
1545
1351
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1546
1352
if(ret == -1){
1547
perror_plus("sigaddset");
1353
perror("sigaddset");
1548
1354
exitcode = EX_OSERR;
1549
1355
goto end;
1550
1356
}
1551
1357
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1552
1358
if(ret == -1){
1553
perror_plus("sigaddset");
1359
perror("sigaddset");
1554
1360
exitcode = EX_OSERR;
1555
1361
goto end;
1556
1362
}
1560
1366
*/
1561
1367
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1562
1368
if(ret == -1){
1563
perror_plus("sigaction");
1369
perror("sigaction");
1564
1370
return EX_OSERR;
1565
1371
}
1566
1372
if(old_sigterm_action.sa_handler != SIG_IGN){
1567
1373
ret = sigaction(SIGINT, &sigterm_action, NULL);
1568
1374
if(ret == -1){
1569
perror_plus("sigaction");
1375
perror("sigaction");
1570
1376
exitcode = EX_OSERR;
1571
1377
goto end;
1572
1378
}
1573
1379
}
1574
1380
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1575
1381
if(ret == -1){
1576
perror_plus("sigaction");
1382
perror("sigaction");
1577
1383
return EX_OSERR;
1578
1384
}
1579
1385
if(old_sigterm_action.sa_handler != SIG_IGN){
1580
1386
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1581
1387
if(ret == -1){
1582
perror_plus("sigaction");
1388
perror("sigaction");
1583
1389
exitcode = EX_OSERR;
1584
1390
goto end;
1585
1391
}
1586
1392
}
1587
1393
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1588
1394
if(ret == -1){
1589
perror_plus("sigaction");
1395
perror("sigaction");
1590
1396
return EX_OSERR;
1591
1397
}
1592
1398
if(old_sigterm_action.sa_handler != SIG_IGN){
1593
1399
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1594
1400
if(ret == -1){
1595
perror_plus("sigaction");
1401
perror("sigaction");
1596
1402
exitcode = EX_OSERR;
1597
1403
goto end;
1598
1404
}
1615
1421
errno = 0;
1616
1422
ret = seteuid(0);
1617
1423
if(ret == -1){
1618
perror_plus("seteuid");
1424
perror("seteuid");
1619
1425
}
1620
1426
1621
1427
#ifdef __linux__
1625
1431
bool restore_loglevel = true;
1626
1432
if(ret == -1){
1627
1433
restore_loglevel = false;
1628
perror_plus("klogctl");
1434
perror("klogctl");
1629
1435
}
1630
1436
#endif /* __linux__ */
1631
1437
1632
1438
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1633
1439
if(sd < 0){
1634
perror_plus("socket");
1440
perror("socket");
1635
1441
exitcode = EX_OSERR;
1636
1442
#ifdef __linux__
1637
1443
if(restore_loglevel){
1638
1444
ret = klogctl(7, NULL, 0);
1639
1445
if(ret == -1){
1640
perror_plus("klogctl");
1446
perror("klogctl");
1641
1447
}
1642
1448
}
1643
1449
#endif /* __linux__ */
1645
1451
errno = 0;
1646
1452
ret = seteuid(uid);
1647
1453
if(ret == -1){
1648
perror_plus("seteuid");
1454
perror("seteuid");
1649
1455
}
1650
1456
goto end;
1651
1457
}
1652
1458
strcpy(network.ifr_name, interface);
1653
1459
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1654
1460
if(ret == -1){
1655
perror_plus("ioctl SIOCGIFFLAGS");
1461
perror("ioctl SIOCGIFFLAGS");
1656
1462
#ifdef __linux__
1657
1463
if(restore_loglevel){
1658
1464
ret = klogctl(7, NULL, 0);
1659
1465
if(ret == -1){
1660
perror_plus("klogctl");
1466
perror("klogctl");
1661
1467
}
1662
1468
}
1663
1469
#endif /* __linux__ */
1666
1472
errno = 0;
1667
1473
ret = seteuid(uid);
1668
1474
if(ret == -1){
1669
perror_plus("seteuid");
1475
perror("seteuid");
1670
1476
}
1671
1477
goto end;
1672
1478
}
1676
1482
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1677
1483
if(ret == -1){
1678
1484
take_down_interface = false;
1679
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1485
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1680
1486
exitcode = EX_OSERR;
1681
1487
#ifdef __linux__
1682
1488
if(restore_loglevel){
1683
1489
ret = klogctl(7, NULL, 0);
1684
1490
if(ret == -1){
1685
perror_plus("klogctl");
1491
perror("klogctl");
1686
1492
}
1687
1493
}
1688
1494
#endif /* __linux__ */
1690
1496
errno = 0;
1691
1497
ret = seteuid(uid);
1692
1498
if(ret == -1){
1693
perror_plus("seteuid");
1499
perror("seteuid");
1694
1500
}
1695
1501
goto end;
1696
1502
}
1697
1503
}
1698
/* Sleep checking until interface is running.
1699
Check every 0.25s, up to total time of delay */
1504
/* sleep checking until interface is running */
1700
1505
for(int i=0; i < delay * 4; i++){
1701
1506
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1702
1507
if(ret == -1){
1703
perror_plus("ioctl SIOCGIFFLAGS");
1508
perror("ioctl SIOCGIFFLAGS");
1704
1509
} else if(network.ifr_flags & IFF_RUNNING){
1705
1510
break;
1706
1511
}
1707
1512
struct timespec sleeptime = { .tv_nsec = 250000000 };
1708
1513
ret = nanosleep(&sleeptime, NULL);
1709
1514
if(ret == -1 and errno != EINTR){
1710
perror_plus("nanosleep");
1515
perror("nanosleep");
1711
1516
}
1712
1517
}
1713
1518
if(not take_down_interface){
1714
1519
/* We won't need the socket anymore */
1715
1520
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1716
1521
if(ret == -1){
1717
perror_plus("close");
1522
perror("close");
1718
1523
}
1719
1524
}
1720
1525
#ifdef __linux__
1722
1527
/* Restores kernel loglevel to default */
1723
1528
ret = klogctl(7, NULL, 0);
1724
1529
if(ret == -1){
1725
perror_plus("klogctl");
1530
perror("klogctl");
1726
1531
}
1727
1532
}
1728
1533
#endif /* __linux__ */
1732
1537
/* Lower privileges */
1733
1538
ret = seteuid(uid);
1734
1539
if(ret == -1){
1735
perror_plus("seteuid");
1540
perror("seteuid");
1736
1541
}
1737
1542
} else {
1738
1543
/* Lower privileges permanently */
1739
1544
ret = setuid(uid);
1740
1545
if(ret == -1){
1741
perror_plus("setuid");
1546
perror("setuid");
1742
1547
}
1743
1548
}
1744
1549
}
1760
1565
goto end;
1761
1566
}
1762
1567
1568
tempdir_created = true;
1763
1569
if(mkdtemp(tempdir) == NULL){
1764
perror_plus("mkdtemp");
1570
tempdir_created = false;
1571
perror("mkdtemp");
1765
1572
goto end;
1766
1573
}
1767
tempdir_created = true;
1768
1574
1769
1575
if(quit_now){
1770
1576
goto end;
1812
1618
1813
1619
port = (uint16_t)tmpmax;
1814
1620
*address = '\0';
1621
address = connect_to;
1815
1622
/* Colon in address indicates IPv6 */
1816
1623
int af;
1817
if(strchr(connect_to, ':') != NULL){
1624
if(strchr(address, ':') != NULL){
1818
1625
af = AF_INET6;
1819
/* Accept [] around IPv6 address - see RFC 5952 */
1820
if(connect_to[0] == '[' and address[-1] == ']')
1821
{
1822
connect_to++;
1823
address[-1] = '\0';
1824
}
1825
1626
} else {
1826
1627
af = AF_INET;
1827
1628
}
1828
address = connect_to;
1829
1629
1830
1630
if(quit_now){
1831
1631
goto end;
1832
1632
}
1833
1633
1834
1634
while(not quit_now){
1835
1635
ret = start_mandos_communication(address, port, if_index, af);
1836
1636
if(quit_now or ret == 0){
1837
1637
break;
1838
1638
}
1839
if(debug){
1840
fprintf(stderr, "Retrying in %d seconds\n",
1841
(int)retry_interval);
1842
}
1843
sleep((int)retry_interval);
1844
}
1845
1639
sleep(15);
1640
};
1641
1846
1642
if (not quit_now){
1847
1643
exitcode = EXIT_SUCCESS;
1848
1644
}
1904
1700
if(debug){
1905
1701
fprintf(stderr, "Starting Avahi loop search\n");
1906
1702
}
1907
1908
ret = avahi_loop_with_timeout(mc.simple_poll,
1909
(int)(retry_interval * 1000));
1910
if(debug){
1911
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1912
(ret == 0) ? "successfully" : "with error");
1913
}
1703
1704
avahi_simple_poll_loop(mc.simple_poll);
1914
1705
1915
1706
end:
1916
1707
1937
1728
if(gpgme_initialized){
1938
1729
gpgme_release(mc.ctx);
1939
1730
}
1940
1941
/* Cleans up the circular linked list of Mandos servers the client
1942
has seen */
1943
if(mc.current_server != NULL){
1944
mc.current_server->prev->next = NULL;
1945
while(mc.current_server != NULL){
1946
server *next = mc.current_server->next;
1947
free(mc.current_server);
1948
mc.current_server = next;
1949
}
1950
}
1951
1731
1952
1732
/* Take down the network interface */
1953
1733
if(take_down_interface){
1955
1735
errno = 0;
1956
1736
ret = seteuid(0);
1957
1737
if(ret == -1){
1958
perror_plus("seteuid");
1738
perror("seteuid");
1959
1739
}
1960
1740
if(geteuid() == 0){
1961
1741
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1962
1742
if(ret == -1){
1963
perror_plus("ioctl SIOCGIFFLAGS");
1743
perror("ioctl SIOCGIFFLAGS");
1964
1744
} else if(network.ifr_flags & IFF_UP) {
1965
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1966
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1967
1747
if(ret == -1){
1968
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1969
1749
}
1970
1750
}
1971
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1972
1752
if(ret == -1){
1973
perror_plus("close");
1753
perror("close");
1974
1754
}
1975
1755
/* Lower privileges permanently */
1976
1756
errno = 0;
1977
1757
ret = setuid(uid);
1978
1758
if(ret == -1){
1979
perror_plus("setuid");
1759
perror("setuid");
1980
1760
}
1981
1761
}
1982
1762
}
1983
1763
1984
/* Removes the GPGME temp directory and all files inside */
1764
/* Removes the temp directory used by GPGME */
1985
1765
if(tempdir_created){
1986
struct dirent **direntries = NULL;
1987
struct dirent *direntry = NULL;
1988
int numentries = scandir(tempdir, &direntries, notdotentries,
1989
alphasort);
1990
if (numentries > 0){
1991
for(int i = 0; i < numentries; i++){
1992
direntry = direntries[i];
1766
DIR *d;
1767
struct dirent *direntry;
1768
d = opendir(tempdir);
1769
if(d == NULL){
1770
if(errno != ENOENT){
1771
perror("opendir");
1772
}
1773
} else {
1774
while(true){
1775
direntry = readdir(d);
1776
if(direntry == NULL){
1777
break;
1778
}
1779
/* Skip "." and ".." */
1780
if(direntry->d_name[0] == '.'
1781
and (direntry->d_name[1] == '\0'
1782
or (direntry->d_name[1] == '.'
1783
and direntry->d_name[2] == '\0'))){
1784
continue;
1785
}
1993
1786
char *fullname = NULL;
1994
1787
ret = asprintf(&fullname, "%s/%s", tempdir,
1995
1788
direntry->d_name);
1996
1789
if(ret < 0){
1997
perror_plus("asprintf");
1790
perror("asprintf");
1998
1791
continue;
1999
1792
}
2000
1793
ret = remove(fullname);
2004
1797
}
2005
1798
free(fullname);
2006
1799
}
2007
}
2008
2009
/* need to clean even if 0 because man page doesn't specify */
2010
free(direntries);
2011
if (numentries == -1){
2012
perror_plus("scandir");
1800
closedir(d);
2013
1801
}
2014
1802
ret = rmdir(tempdir);
2015
1803
if(ret == -1 and errno != ENOENT){
2016
perror_plus("rmdir");
1804
perror("rmdir");
2017
1805
}
2018
1806
}
2019
1807
2024
1812
&old_sigterm_action,
2025
1813
NULL));
2026
1814
if(ret == -1){
2027
perror_plus("sigaction");
1815
perror("sigaction");
2028
1816
}
2029
1817
do {
2030
1818
ret = raise(signal_received);
2031
1819
} while(ret != 0 and errno == EINTR);
2032
1820
if(ret != 0){
2033
perror_plus("raise");
1821
perror("raise");
2034
1822
abort();
2035
1823
}
2036
1824
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0