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- Committer: teddy at bsnet
- Date: 2010-09-08 19:25:13 UTC
- Revision ID: teddy@fukt.bsnet.se-20100908192513-ccso0jpam3qg4yze
* TODO: Clarifications.
- 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
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,
128
127
static const char mandos_protocol_version[] = "1";
129
128
const char *argp_program_version = "mandos-client " VERSION;
130
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.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;
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
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
193
int ret;
194
server *new_server = malloc(sizeof(server));
195
if(new_server == NULL){
196
perror_plus("malloc");
197
return -1;
198
}
199
*new_server = (server){ .ip = strdup(ip),
200
.port = port,
201
.if_index = if_index,
202
.af = af };
203
if(new_server->ip == NULL){
204
perror_plus("strdup");
205
return -1;
206
}
207
/* unique case of first server */
208
if (mc.current_server == NULL){
209
new_server->next = new_server;
210
new_server->prev = new_server;
211
mc.current_server = new_server;
212
/* Placing the new server last in the list */
213
} else {
214
new_server->next = mc.current_server;
215
new_server->prev = mc.current_server->prev;
216
new_server->prev->next = new_server;
217
mc.current_server->prev = new_server;
218
}
219
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
220
if(ret == -1){
221
perror_plus("clock_gettime");
222
return -1;
223
}
224
return 0;
225
}
226
227
167
/*
228
168
* Initialize GPGME.
229
169
*/
243
183
244
184
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
245
185
if(fd == -1){
246
perror_plus("open");
186
perror("open");
247
187
return false;
248
188
}
249
189
263
203
264
204
ret = (int)TEMP_FAILURE_RETRY(close(fd));
265
205
if(ret == -1){
266
perror_plus("close");
206
perror("close");
267
207
}
268
208
gpgme_data_release(pgp_data);
269
209
return true;
394
334
395
335
/* Seek back to the beginning of the GPGME plaintext data buffer */
396
336
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
397
perror_plus("gpgme_data_seek");
337
perror("gpgme_data_seek");
398
338
plaintext_length = -1;
399
339
goto decrypt_end;
400
340
}
405
345
(size_t)plaintext_length,
406
346
plaintext_capacity);
407
347
if(plaintext_capacity == 0){
408
perror_plus("incbuffer");
348
perror("incbuffer");
409
349
plaintext_length = -1;
410
350
goto decrypt_end;
411
351
}
418
358
break;
419
359
}
420
360
if(ret < 0){
421
perror_plus("gpgme_data_read");
361
perror("gpgme_data_read");
422
362
plaintext_length = -1;
423
363
goto decrypt_end;
424
364
}
481
421
}
482
422
483
423
/* OpenPGP credentials */
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
424
gnutls_certificate_allocate_credentials(&mc.cred);
485
425
if(ret != GNUTLS_E_SUCCESS){
486
fprintf(stderr, "GnuTLS memory error: %s\n",
426
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
427
from
428
-Wunreachable-code
429
*/
487
430
safer_gnutls_strerror(ret));
488
431
gnutls_global_deinit();
489
432
return -1;
644
587
tcp_sd = socket(pf, SOCK_STREAM, 0);
645
588
if(tcp_sd < 0){
646
589
int e = errno;
647
perror_plus("socket");
590
perror("socket");
648
591
errno = e;
649
592
goto mandos_end;
650
593
}
664
607
}
665
608
if(ret < 0 ){
666
609
int e = errno;
667
perror_plus("inet_pton");
610
perror("inet_pton");
668
611
errno = e;
669
612
goto mandos_end;
670
613
}
706
649
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
707
650
char interface[IF_NAMESIZE];
708
651
if(if_indextoname((unsigned int)if_index, interface) == NULL){
709
perror_plus("if_indextoname");
652
perror("if_indextoname");
710
653
} else {
711
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
655
ip, interface, port);
726
669
sizeof(addrstr));
727
670
}
728
671
if(pcret == NULL){
729
perror_plus("inet_ntop");
672
perror("inet_ntop");
730
673
} else {
731
674
if(strcmp(addrstr, ip) != 0){
732
675
fprintf(stderr, "Canonical address form: %s\n", addrstr);
745
688
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
746
689
}
747
690
if(ret < 0){
748
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
749
int e = errno;
750
perror_plus("connect");
751
errno = e;
752
}
691
int e = errno;
692
perror("connect");
693
errno = e;
753
694
goto mandos_end;
754
695
}
755
696
766
707
out_size - written));
767
708
if(ret == -1){
768
709
int e = errno;
769
perror_plus("write");
710
perror("write");
770
711
errno = e;
771
712
goto mandos_end;
772
713
}
797
738
goto mandos_end;
798
739
}
799
740
800
/* Spurious warning from -Wint-to-pointer-cast */
801
741
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
802
742
803
743
if(quit_now){
840
780
buffer_capacity);
841
781
if(buffer_capacity == 0){
842
782
int e = errno;
843
perror_plus("incbuffer");
783
perror("incbuffer");
844
784
errno = e;
845
785
goto mandos_end;
846
786
}
951
891
if(e == 0){
952
892
e = errno;
953
893
}
954
perror_plus("close");
894
perror("close");
955
895
}
956
896
gnutls_deinit(session);
957
errno = e;
958
897
if(quit_now){
959
errno = EINTR;
898
e = EINTR;
960
899
retval = -1;
961
900
}
901
errno = e;
962
902
}
963
903
return retval;
964
904
}
1007
947
avahi_proto_to_af(proto));
1008
948
if(ret == 0){
1009
949
avahi_simple_poll_quit(mc.simple_poll);
1010
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
1013
950
}
1014
951
}
1015
952
}
1069
1006
}
1070
1007
}
1071
1008
1072
/* Signal handler that stops main loop after SIGTERM */
1009
/* stop main loop after sigterm has been called */
1073
1010
static void handle_sigterm(int sig){
1074
1011
if(quit_now){
1075
1012
return;
1077
1014
quit_now = 1;
1078
1015
signal_received = sig;
1079
1016
int old_errno = errno;
1080
/* set main loop to exit */
1081
1017
if(mc.simple_poll != NULL){
1082
1018
avahi_simple_poll_quit(mc.simple_poll);
1083
1019
}
1084
1020
errno = old_errno;
1085
1021
}
1086
1022
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1143
if(debug){
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1146
}
1147
free(flagstring);
1148
return 0;
1149
}
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1154
if(debug){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1157
}
1158
return 0;
1159
}
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1162
if(debug){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1165
}
1166
return 1;
1167
}
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1170
if(debug){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1173
}
1174
return 0;
1175
}
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1178
if(debug){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1181
}
1182
return 0;
1183
}
1184
/* Accept this device */
1185
if(debug){
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1188
}
1189
return 1;
1190
}
1191
1192
int notdotentries(const struct dirent *direntry){
1193
/* Skip "." and ".." */
1194
if(direntry->d_name[0] == '.'
1195
and (direntry->d_name[1] == '\0'
1196
or (direntry->d_name[1] == '.'
1197
and direntry->d_name[2] == '\0'))){
1198
return 0;
1199
}
1200
return 1;
1201
}
1202
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1204
int ret;
1205
struct timespec now;
1206
struct timespec waited_time;
1207
intmax_t block_time;
1208
1209
while(true){
1210
if(mc.current_server == NULL){
1211
if (debug){
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1214
}
1215
ret = avahi_simple_poll_iterate(s, -1);
1216
} else {
1217
if (debug){
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1220
}
1221
/* the current time */
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1223
if(ret == -1){
1224
perror_plus("clock_gettime");
1225
return -1;
1226
}
1227
/* Calculating in ms how long time between now and server
1228
who we visted longest time ago. Now - last seen. */
1229
waited_time.tv_sec = (now.tv_sec
1230
- mc.current_server->last_seen.tv_sec);
1231
waited_time.tv_nsec = (now.tv_nsec
1232
- mc.current_server->last_seen.tv_nsec);
1233
/* total time is 10s/10,000ms.
1234
Converting to s from ms by dividing by 1,000,
1235
and ns to ms by dividing by 1,000,000. */
1236
block_time = ((retry_interval
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1239
1240
if (debug){
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1242
}
1243
1244
if(block_time <= 0){
1245
ret = start_mandos_communication(mc.current_server->ip,
1246
mc.current_server->port,
1247
mc.current_server->if_index,
1248
mc.current_server->af);
1249
if(ret == 0){
1250
avahi_simple_poll_quit(mc.simple_poll);
1251
return 0;
1252
}
1253
ret = clock_gettime(CLOCK_MONOTONIC,
1254
&mc.current_server->last_seen);
1255
if(ret == -1){
1256
perror_plus("clock_gettime");
1257
return -1;
1258
}
1259
mc.current_server = mc.current_server->next;
1260
block_time = 0; /* Call avahi to find new Mandos
1261
servers, but don't block */
1262
}
1263
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1265
}
1266
if(ret != 0){
1267
if (ret > 0 or errno != EINTR) {
1268
return (ret != 1) ? ret : 0;
1269
}
1270
}
1271
}
1272
}
1273
1274
1023
int main(int argc, char *argv[]){
1275
1024
AvahiSServiceBrowser *sb = NULL;
1276
1025
int error;
1278
1027
intmax_t tmpmax;
1279
1028
char *tmp;
1280
1029
int exitcode = EXIT_SUCCESS;
1281
const char *interface = "";
1030
const char *interface = "eth0";
1282
1031
struct ifreq network;
1283
1032
int sd = -1;
1284
1033
bool take_down_interface = false;
1285
1034
uid_t uid;
1286
1035
gid_t gid;
1036
char *connect_to = NULL;
1287
1037
char tempdir[] = "/tmp/mandosXXXXXX";
1288
1038
bool tempdir_created = false;
1289
1039
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1293
1043
bool gnutls_initialized = false;
1294
1044
bool gpgme_initialized = false;
1295
1045
float delay = 2.5f;
1296
double retry_interval = 10; /* 10s between trying a server and
1297
retrying the same server again */
1298
1046
1299
1047
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1300
1048
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1306
1054
errno = 0;
1307
1055
ret = setgid(gid);
1308
1056
if(ret == -1){
1309
perror_plus("setgid");
1057
perror("setgid");
1310
1058
}
1311
1059
1312
1060
/* Lower user privileges (temporarily) */
1313
1061
errno = 0;
1314
1062
ret = seteuid(uid);
1315
1063
if(ret == -1){
1316
perror_plus("seteuid");
1064
perror("seteuid");
1317
1065
}
1318
1066
1319
1067
if(quit_now){
1354
1102
.arg = "SECONDS",
1355
1103
.doc = "Maximum delay to wait for interface startup",
1356
1104
.group = 2 },
1357
{ .name = "retry", .key = 132,
1358
.arg = "SECONDS",
1359
.doc = "Retry interval used when denied by the mandos server",
1360
.group = 2 },
1361
1105
/*
1362
1106
* These reproduce what we would get without ARGP_NO_HELP
1363
1107
*/
1407
1151
if(errno != 0 or tmp == arg or *tmp != '\0'){
1408
1152
argp_error(state, "Bad delay");
1409
1153
}
1410
case 132: /* --retry */
1411
errno = 0;
1412
retry_interval = strtod(arg, &tmp);
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1414
or (retry_interval * 1000) > INT_MAX){
1415
argp_error(state, "Bad retry interval");
1416
}
1417
1154
break;
1418
1155
/*
1419
1156
* These reproduce what we would get without ARGP_NO_HELP
1447
1184
case ENOMEM:
1448
1185
default:
1449
1186
errno = ret;
1450
perror_plus("argp_parse");
1187
perror("argp_parse");
1451
1188
exitcode = EX_OSERR;
1452
1189
goto end;
1453
1190
case EINVAL:
1455
1192
goto end;
1456
1193
}
1457
1194
}
1458
1459
{
1460
/* Work around Debian bug #633582:
1461
<http://bugs.debian.org/633582> */
1462
struct stat st;
1463
1464
/* Re-raise priviliges */
1465
errno = 0;
1466
ret = seteuid(0);
1467
if(ret == -1){
1468
perror_plus("seteuid");
1469
}
1470
1471
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1472
if(seckey_fd == -1){
1473
perror_plus("open");
1474
} else {
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_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(seckey_fd, uid, gid);
1481
if(ret == -1){
1482
perror_plus("fchown");
1483
}
1484
}
1485
}
1486
TEMP_FAILURE_RETRY(close(seckey_fd));
1487
}
1488
1489
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1490
if(pubkey_fd == -1){
1491
perror_plus("open");
1492
} else {
1493
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1494
if(ret == -1){
1495
perror_plus("fstat");
1496
} else {
1497
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1498
ret = fchown(pubkey_fd, uid, gid);
1499
if(ret == -1){
1500
perror_plus("fchown");
1501
}
1502
}
1503
}
1504
TEMP_FAILURE_RETRY(close(pubkey_fd));
1505
}
1506
1507
/* Lower privileges */
1508
errno = 0;
1509
ret = seteuid(uid);
1510
if(ret == -1){
1511
perror_plus("seteuid");
1512
}
1513
}
1514
1195
1515
1196
if(not debug){
1516
1197
avahi_set_log_function(empty_log);
1517
1198
}
1518
1519
if(interface[0] == '\0'){
1520
struct dirent **direntries;
1521
ret = scandir(sys_class_net, &direntries, good_interface,
1522
alphasort);
1523
if(ret >= 1){
1524
/* Pick the first good interface */
1525
interface = strdup(direntries[0]->d_name);
1526
if(debug){
1527
fprintf(stderr, "Using interface \"%s\"\n", interface);
1528
}
1529
if(interface == NULL){
1530
perror_plus("malloc");
1531
free(direntries);
1532
exitcode = EXIT_FAILURE;
1533
goto end;
1534
}
1535
free(direntries);
1536
} else {
1537
free(direntries);
1538
fprintf(stderr, "Could not find a network interface\n");
1539
exitcode = EXIT_FAILURE;
1540
goto end;
1541
}
1542
}
1543
1199
1544
1200
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1545
1201
from the signal handler */
1555
1211
sigemptyset(&sigterm_action.sa_mask);
1556
1212
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1557
1213
if(ret == -1){
1558
perror_plus("sigaddset");
1214
perror("sigaddset");
1559
1215
exitcode = EX_OSERR;
1560
1216
goto end;
1561
1217
}
1562
1218
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1563
1219
if(ret == -1){
1564
perror_plus("sigaddset");
1220
perror("sigaddset");
1565
1221
exitcode = EX_OSERR;
1566
1222
goto end;
1567
1223
}
1568
1224
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1569
1225
if(ret == -1){
1570
perror_plus("sigaddset");
1226
perror("sigaddset");
1571
1227
exitcode = EX_OSERR;
1572
1228
goto end;
1573
1229
}
1577
1233
*/
1578
1234
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1579
1235
if(ret == -1){
1580
perror_plus("sigaction");
1236
perror("sigaction");
1581
1237
return EX_OSERR;
1582
1238
}
1583
1239
if(old_sigterm_action.sa_handler != SIG_IGN){
1584
1240
ret = sigaction(SIGINT, &sigterm_action, NULL);
1585
1241
if(ret == -1){
1586
perror_plus("sigaction");
1242
perror("sigaction");
1587
1243
exitcode = EX_OSERR;
1588
1244
goto end;
1589
1245
}
1590
1246
}
1591
1247
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1592
1248
if(ret == -1){
1593
perror_plus("sigaction");
1249
perror("sigaction");
1594
1250
return EX_OSERR;
1595
1251
}
1596
1252
if(old_sigterm_action.sa_handler != SIG_IGN){
1597
1253
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1598
1254
if(ret == -1){
1599
perror_plus("sigaction");
1255
perror("sigaction");
1600
1256
exitcode = EX_OSERR;
1601
1257
goto end;
1602
1258
}
1603
1259
}
1604
1260
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1605
1261
if(ret == -1){
1606
perror_plus("sigaction");
1262
perror("sigaction");
1607
1263
return EX_OSERR;
1608
1264
}
1609
1265
if(old_sigterm_action.sa_handler != SIG_IGN){
1610
1266
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1611
1267
if(ret == -1){
1612
perror_plus("sigaction");
1268
perror("sigaction");
1613
1269
exitcode = EX_OSERR;
1614
1270
goto end;
1615
1271
}
1616
1272
}
1617
1273
1618
1274
/* If the interface is down, bring it up */
1619
if(strcmp(interface, "none") != 0){
1275
if(interface[0] != '\0'){
1620
1276
if_index = (AvahiIfIndex) if_nametoindex(interface);
1621
1277
if(if_index == 0){
1622
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1632
1288
errno = 0;
1633
1289
ret = seteuid(0);
1634
1290
if(ret == -1){
1635
perror_plus("seteuid");
1291
perror("seteuid");
1636
1292
}
1637
1293
1638
1294
#ifdef __linux__
1642
1298
bool restore_loglevel = true;
1643
1299
if(ret == -1){
1644
1300
restore_loglevel = false;
1645
perror_plus("klogctl");
1301
perror("klogctl");
1646
1302
}
1647
1303
#endif /* __linux__ */
1648
1304
1649
1305
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1650
1306
if(sd < 0){
1651
perror_plus("socket");
1307
perror("socket");
1652
1308
exitcode = EX_OSERR;
1653
1309
#ifdef __linux__
1654
1310
if(restore_loglevel){
1655
1311
ret = klogctl(7, NULL, 0);
1656
1312
if(ret == -1){
1657
perror_plus("klogctl");
1313
perror("klogctl");
1658
1314
}
1659
1315
}
1660
1316
#endif /* __linux__ */
1662
1318
errno = 0;
1663
1319
ret = seteuid(uid);
1664
1320
if(ret == -1){
1665
perror_plus("seteuid");
1321
perror("seteuid");
1666
1322
}
1667
1323
goto end;
1668
1324
}
1669
1325
strcpy(network.ifr_name, interface);
1670
1326
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1671
1327
if(ret == -1){
1672
perror_plus("ioctl SIOCGIFFLAGS");
1328
perror("ioctl SIOCGIFFLAGS");
1673
1329
#ifdef __linux__
1674
1330
if(restore_loglevel){
1675
1331
ret = klogctl(7, NULL, 0);
1676
1332
if(ret == -1){
1677
perror_plus("klogctl");
1333
perror("klogctl");
1678
1334
}
1679
1335
}
1680
1336
#endif /* __linux__ */
1683
1339
errno = 0;
1684
1340
ret = seteuid(uid);
1685
1341
if(ret == -1){
1686
perror_plus("seteuid");
1342
perror("seteuid");
1687
1343
}
1688
1344
goto end;
1689
1345
}
1693
1349
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1694
1350
if(ret == -1){
1695
1351
take_down_interface = false;
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1352
perror("ioctl SIOCSIFFLAGS");
1697
1353
exitcode = EX_OSERR;
1698
1354
#ifdef __linux__
1699
1355
if(restore_loglevel){
1700
1356
ret = klogctl(7, NULL, 0);
1701
1357
if(ret == -1){
1702
perror_plus("klogctl");
1358
perror("klogctl");
1703
1359
}
1704
1360
}
1705
1361
#endif /* __linux__ */
1707
1363
errno = 0;
1708
1364
ret = seteuid(uid);
1709
1365
if(ret == -1){
1710
perror_plus("seteuid");
1366
perror("seteuid");
1711
1367
}
1712
1368
goto end;
1713
1369
}
1714
1370
}
1715
/* Sleep checking until interface is running.
1716
Check every 0.25s, up to total time of delay */
1371
/* sleep checking until interface is running */
1717
1372
for(int i=0; i < delay * 4; i++){
1718
1373
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1719
1374
if(ret == -1){
1720
perror_plus("ioctl SIOCGIFFLAGS");
1375
perror("ioctl SIOCGIFFLAGS");
1721
1376
} else if(network.ifr_flags & IFF_RUNNING){
1722
1377
break;
1723
1378
}
1724
1379
struct timespec sleeptime = { .tv_nsec = 250000000 };
1725
1380
ret = nanosleep(&sleeptime, NULL);
1726
1381
if(ret == -1 and errno != EINTR){
1727
perror_plus("nanosleep");
1382
perror("nanosleep");
1728
1383
}
1729
1384
}
1730
1385
if(not take_down_interface){
1731
1386
/* We won't need the socket anymore */
1732
1387
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1733
1388
if(ret == -1){
1734
perror_plus("close");
1389
perror("close");
1735
1390
}
1736
1391
}
1737
1392
#ifdef __linux__
1739
1394
/* Restores kernel loglevel to default */
1740
1395
ret = klogctl(7, NULL, 0);
1741
1396
if(ret == -1){
1742
perror_plus("klogctl");
1397
perror("klogctl");
1743
1398
}
1744
1399
}
1745
1400
#endif /* __linux__ */
1749
1404
/* Lower privileges */
1750
1405
ret = seteuid(uid);
1751
1406
if(ret == -1){
1752
perror_plus("seteuid");
1407
perror("seteuid");
1753
1408
}
1754
1409
} else {
1755
1410
/* Lower privileges permanently */
1756
1411
ret = setuid(uid);
1757
1412
if(ret == -1){
1758
perror_plus("setuid");
1413
perror("setuid");
1759
1414
}
1760
1415
}
1761
1416
}
1777
1432
goto end;
1778
1433
}
1779
1434
1435
tempdir_created = true;
1780
1436
if(mkdtemp(tempdir) == NULL){
1781
perror_plus("mkdtemp");
1437
tempdir_created = false;
1438
perror("mkdtemp");
1782
1439
goto end;
1783
1440
}
1784
tempdir_created = true;
1785
1441
1786
1442
if(quit_now){
1787
1443
goto end;
1841
1497
if(quit_now){
1842
1498
goto end;
1843
1499
}
1844
1845
while(not quit_now){
1846
ret = start_mandos_communication(address, port, if_index, af);
1847
if(quit_now or ret == 0){
1500
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;
1848
1520
break;
1849
1521
}
1850
sleep((int)retry_interval or 1);
1851
};
1852
1853
if (not quit_now){
1522
} else {
1854
1523
exitcode = EXIT_SUCCESS;
1855
1524
}
1856
1857
1525
goto end;
1858
1526
}
1859
1527
1911
1579
if(debug){
1912
1580
fprintf(stderr, "Starting Avahi loop search\n");
1913
1581
}
1914
1915
ret = avahi_loop_with_timeout(mc.simple_poll,
1916
(int)(retry_interval * 1000));
1917
if(debug){
1918
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1919
(ret == 0) ? "successfully" : "with error");
1920
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
1921
1584
1922
1585
end:
1923
1586
1944
1607
if(gpgme_initialized){
1945
1608
gpgme_release(mc.ctx);
1946
1609
}
1947
1948
/* Cleans up the circular linked list of Mandos servers the client
1949
has seen */
1950
if(mc.current_server != NULL){
1951
mc.current_server->prev->next = NULL;
1952
while(mc.current_server != NULL){
1953
server *next = mc.current_server->next;
1954
free(mc.current_server);
1955
mc.current_server = next;
1956
}
1957
}
1958
1610
1959
1611
/* Take down the network interface */
1960
1612
if(take_down_interface){
1962
1614
errno = 0;
1963
1615
ret = seteuid(0);
1964
1616
if(ret == -1){
1965
perror_plus("seteuid");
1617
perror("seteuid");
1966
1618
}
1967
1619
if(geteuid() == 0){
1968
1620
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1969
1621
if(ret == -1){
1970
perror_plus("ioctl SIOCGIFFLAGS");
1622
perror("ioctl SIOCGIFFLAGS");
1971
1623
} else if(network.ifr_flags & IFF_UP) {
1972
1624
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1973
1625
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1974
1626
if(ret == -1){
1975
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1627
perror("ioctl SIOCSIFFLAGS");
1976
1628
}
1977
1629
}
1978
1630
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1979
1631
if(ret == -1){
1980
perror_plus("close");
1632
perror("close");
1981
1633
}
1982
1634
/* Lower privileges permanently */
1983
1635
errno = 0;
1984
1636
ret = setuid(uid);
1985
1637
if(ret == -1){
1986
perror_plus("setuid");
1638
perror("setuid");
1987
1639
}
1988
1640
}
1989
1641
}
1990
1642
1991
/* Removes the GPGME temp directory and all files inside */
1643
/* Removes the temp directory used by GPGME */
1992
1644
if(tempdir_created){
1993
struct dirent **direntries = NULL;
1994
struct dirent *direntry = NULL;
1995
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1996
if (ret > 0){
1997
for(int i = 0; i < ret; i++){
1998
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
}
1999
1665
char *fullname = NULL;
2000
1666
ret = asprintf(&fullname, "%s/%s", tempdir,
2001
1667
direntry->d_name);
2002
1668
if(ret < 0){
2003
perror_plus("asprintf");
1669
perror("asprintf");
2004
1670
continue;
2005
1671
}
2006
1672
ret = remove(fullname);
2010
1676
}
2011
1677
free(fullname);
2012
1678
}
2013
}
2014
2015
/* need to be cleaned even if ret == 0 because man page doesn't
2016
specify */
2017
free(direntries);
2018
if (ret == -1){
2019
perror_plus("scandir");
1679
closedir(d);
2020
1680
}
2021
1681
ret = rmdir(tempdir);
2022
1682
if(ret == -1 and errno != ENOENT){
2023
perror_plus("rmdir");
1683
perror("rmdir");
2024
1684
}
2025
1685
}
2026
1686
2031
1691
&old_sigterm_action,
2032
1692
NULL));
2033
1693
if(ret == -1){
2034
perror_plus("sigaction");
1694
perror("sigaction");
2035
1695
}
2036
1696
do {
2037
1697
ret = raise(signal_received);
2038
1698
} while(ret != 0 and errno == EINTR);
2039
1699
if(ret != 0){
2040
perror_plus("raise");
1700
perror("raise");
2041
1701
abort();
2042
1702
}
2043
1703
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0