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- Committer: Björn Påhlsson
- Date: 2010-10-02 17:53:34 UTC
- Revision ID: belorn@fukt.bsnet.se-20101002175334-45vmfxvdexfvnc8t
Tags: version-1.2.1-2
* debian/changelog (1.2.1-2): New entry.
- files removed:
- debian/source/local-options
- files modified:
- DBUS-API
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 © 2008-2010 Teddy Hogeborn
13
* Copyright © 2008-2010 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() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
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,
123
122
#define PATHDIR "/conf/conf.d/mandos"
124
123
#define SECKEY "seckey.txt"
125
124
#define PUBKEY "pubkey.txt"
126
#define HOOKDIR "/lib/mandos/network-hooks.d"
127
125
128
126
bool debug = false;
129
127
static const char mandos_protocol_version[] = "1";
130
128
const char *argp_program_version = "mandos-client " VERSION;
131
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
132
130
static const char sys_class_net[] = "/sys/class/net";
133
131
char *connect_to = NULL;
134
132
135
/* Doubly linked list that need to be circularly linked when used */
136
typedef struct server{
137
const char *ip;
138
uint16_t port;
139
AvahiIfIndex if_index;
140
int af;
141
struct timespec last_seen;
142
struct server *next;
143
struct server *prev;
144
} server;
145
146
133
/* Used for passing in values through the Avahi callback functions */
147
134
typedef struct {
148
135
AvahiSimplePoll *simple_poll;
152
139
gnutls_dh_params_t dh_params;
153
140
const char *priority;
154
141
gpgme_ctx_t ctx;
155
server *current_server;
156
142
} mandos_context;
157
143
158
144
/* global context so signal handler can reach it*/
159
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
160
146
.dh_bits = 1024, .priority = "SECURE256"
161
":!CTYPE-X.509:+CTYPE-OPENPGP",
162
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
163
148
164
149
sig_atomic_t quit_now = 0;
165
150
int signal_received = 0;
166
151
167
/* Function to use when printing errors */
168
void perror_plus(const char *print_text){
169
fprintf(stderr, "Mandos plugin %s: ",
170
program_invocation_short_name);
171
perror(print_text);
172
}
173
174
152
/*
175
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
154
* bytes. "buffer_capacity" is how much is currently allocated,
188
166
return buffer_capacity;
189
167
}
190
168
191
/* Add server to set of servers to retry periodically */
192
int add_server(const char *ip, uint16_t port,
193
AvahiIfIndex if_index,
194
int af){
195
int ret;
196
server *new_server = malloc(sizeof(server));
197
if(new_server == NULL){
198
perror_plus("malloc");
199
return -1;
200
}
201
*new_server = (server){ .ip = strdup(ip),
202
.port = port,
203
.if_index = if_index,
204
.af = af };
205
if(new_server->ip == NULL){
206
perror_plus("strdup");
207
return -1;
208
}
209
/* Special case of first server */
210
if (mc.current_server == NULL){
211
new_server->next = new_server;
212
new_server->prev = new_server;
213
mc.current_server = new_server;
214
/* Place the new server last in the list */
215
} else {
216
new_server->next = mc.current_server;
217
new_server->prev = mc.current_server->prev;
218
new_server->prev->next = new_server;
219
mc.current_server->prev = new_server;
220
}
221
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
if(ret == -1){
223
perror_plus("clock_gettime");
224
return -1;
225
}
226
return 0;
227
}
228
229
169
/*
230
170
* Initialize GPGME.
231
171
*/
245
185
246
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
247
187
if(fd == -1){
248
perror_plus("open");
188
perror("open");
249
189
return false;
250
190
}
251
191
265
205
266
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
267
207
if(ret == -1){
268
perror_plus("close");
208
perror("close");
269
209
}
270
210
gpgme_data_release(pgp_data);
271
211
return true;
284
224
return false;
285
225
}
286
226
287
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
288
228
rc = gpgme_get_engine_info(&engine_info);
289
229
if(rc != GPG_ERR_NO_ERROR){
290
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
396
336
397
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
398
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
399
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
400
340
plaintext_length = -1;
401
341
goto decrypt_end;
402
342
}
407
347
(size_t)plaintext_length,
408
348
plaintext_capacity);
409
349
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
350
perror("incbuffer");
411
351
plaintext_length = -1;
412
352
goto decrypt_end;
413
353
}
420
360
break;
421
361
}
422
362
if(ret < 0){
423
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
424
364
plaintext_length = -1;
425
365
goto decrypt_end;
426
366
}
483
423
}
484
424
485
425
/* OpenPGP credentials */
486
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
487
427
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
489
432
safer_gnutls_strerror(ret));
490
433
gnutls_global_deinit();
491
434
return -1;
646
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
647
590
if(tcp_sd < 0){
648
591
int e = errno;
649
perror_plus("socket");
592
perror("socket");
650
593
errno = e;
651
594
goto mandos_end;
652
595
}
666
609
}
667
610
if(ret < 0 ){
668
611
int e = errno;
669
perror_plus("inet_pton");
612
perror("inet_pton");
670
613
errno = e;
671
614
goto mandos_end;
672
615
}
708
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
709
652
char interface[IF_NAMESIZE];
710
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
perror_plus("if_indextoname");
654
perror("if_indextoname");
712
655
} else {
713
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
657
ip, interface, port);
728
671
sizeof(addrstr));
729
672
}
730
673
if(pcret == NULL){
731
perror_plus("inet_ntop");
674
perror("inet_ntop");
732
675
} else {
733
676
if(strcmp(addrstr, ip) != 0){
734
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
749
692
if(ret < 0){
750
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
751
694
int e = errno;
752
perror_plus("connect");
695
perror("connect");
753
696
errno = e;
754
697
}
755
698
goto mandos_end;
768
711
out_size - written));
769
712
if(ret == -1){
770
713
int e = errno;
771
perror_plus("write");
714
perror("write");
772
715
errno = e;
773
716
goto mandos_end;
774
717
}
799
742
goto mandos_end;
800
743
}
801
744
802
/* Spurious warning from -Wint-to-pointer-cast */
803
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
804
746
805
747
if(quit_now){
842
784
buffer_capacity);
843
785
if(buffer_capacity == 0){
844
786
int e = errno;
845
perror_plus("incbuffer");
787
perror("incbuffer");
846
788
errno = e;
847
789
goto mandos_end;
848
790
}
953
895
if(e == 0){
954
896
e = errno;
955
897
}
956
perror_plus("close");
898
perror("close");
957
899
}
958
900
gnutls_deinit(session);
959
errno = e;
960
901
if(quit_now){
961
errno = EINTR;
902
e = EINTR;
962
903
retval = -1;
963
904
}
905
errno = e;
964
906
}
965
907
return retval;
966
908
}
1009
951
avahi_proto_to_af(proto));
1010
952
if(ret == 0){
1011
953
avahi_simple_poll_quit(mc.simple_poll);
1012
} else {
1013
ret = add_server(ip, port, interface,
1014
avahi_proto_to_af(proto));
1015
954
}
1016
955
}
1017
956
}
1071
1010
}
1072
1011
}
1073
1012
1074
/* Signal handler that stops main loop after SIGTERM */
1013
/* stop main loop after sigterm has been called */
1075
1014
static void handle_sigterm(int sig){
1076
1015
if(quit_now){
1077
1016
return;
1079
1018
quit_now = 1;
1080
1019
signal_received = sig;
1081
1020
int old_errno = errno;
1082
/* set main loop to exit */
1083
1021
if(mc.simple_poll != NULL){
1084
1022
avahi_simple_poll_quit(mc.simple_poll);
1085
1023
}
1086
1024
errno = old_errno;
1087
1025
}
1088
1026
1089
bool get_flags(const char *ifname, struct ifreq *ifr){
1090
int ret;
1091
1092
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1093
if(s < 0){
1094
perror_plus("socket");
1095
return false;
1096
}
1097
strcpy(ifr->ifr_name, ifname);
1098
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1099
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
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1036
if_entry->d_name);
1037
if(ret < 0){
1038
perror("asprintf");
1039
return 0;
1040
}
1041
if(if_entry->d_name[0] == '.'){
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
return 0;
1048
}
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1055
perror("malloc");
1056
close(flags_fd);
1057
return 0;
1058
}
1059
while(to_read > 0){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1061
(size_t)to_read));
1062
if(ssret == -1){
1063
perror("read");
1064
free(flagstring);
1065
close(flags_fd);
1066
return 0;
1067
}
1068
to_read -= ssret;
1069
if(ssret == 0){
1070
break;
1071
}
1072
}
1073
close(flags_fd);
1074
intmax_t tmpmax;
1075
char *tmp;
1076
errno = 0;
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
1100
1081
if(debug){
1101
perror_plus("ioctl SIOCGIFFLAGS");
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1102
1084
}
1103
return false;
1085
free(flagstring);
1086
return 0;
1104
1087
}
1105
return true;
1106
}
1107
1108
bool good_flags(const char *ifname, const struct ifreq *ifr){
1109
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1110
1090
/* Reject the loopback device */
1111
if(ifr->ifr_flags & IFF_LOOPBACK){
1091
if(flags & IFF_LOOPBACK){
1112
1092
if(debug){
1113
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1094
if_entry->d_name);
1115
1095
}
1116
return false;
1096
return 0;
1117
1097
}
1118
1098
/* Accept point-to-point devices only if connect_to is specified */
1119
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1120
1100
if(debug){
1121
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1102
if_entry->d_name);
1123
1103
}
1124
return true;
1104
return 1;
1125
1105
}
1126
1106
/* Otherwise, reject non-broadcast-capable devices */
1127
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1107
if(not (flags & IFF_BROADCAST)){
1128
1108
if(debug){
1129
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1131
}
1132
return false;
1133
}
1134
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
if(ifr->ifr_flags & IFF_NOARP){
1136
if(debug){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1138
}
1139
return false;
1140
}
1141
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
1142
1114
/* Accept this device */
1143
1115
if(debug){
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1145
}
1146
return true;
1147
}
1148
1149
/*
1150
* This function determines if a directory entry in /sys/class/net
1151
* corresponds to an acceptable network device.
1152
* (This function is passed to scandir(3) as a filter function.)
1153
*/
1154
int good_interface(const struct dirent *if_entry){
1155
if(if_entry->d_name[0] == '.'){
1156
return 0;
1157
}
1158
1159
struct ifreq ifr;
1160
if(not get_flags(if_entry->d_name, &ifr)){
1161
if(debug){
1162
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1163
if_entry->d_name);
1164
}
1165
return 0;
1166
}
1167
1168
if(not good_flags(if_entry->d_name, &ifr)){
1169
return 0;
1170
}
1171
return 1;
1172
}
1173
1174
/*
1175
* This function determines if a directory entry in /sys/class/net
1176
* corresponds to an acceptable network device which is up.
1177
* (This function is passed to scandir(3) as a filter function.)
1178
*/
1179
int up_interface(const struct dirent *if_entry){
1180
if(if_entry->d_name[0] == '.'){
1181
return 0;
1182
}
1183
1184
struct ifreq ifr;
1185
if(not get_flags(if_entry->d_name, &ifr)){
1186
if(debug){
1187
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1188
if_entry->d_name);
1189
}
1190
return 0;
1191
}
1192
1193
/* Reject down interfaces */
1194
if(not (ifr.ifr_flags & IFF_UP)){
1195
if(debug){
1196
fprintf(stderr, "Rejecting down interface \"%s\"\n",
1197
if_entry->d_name);
1198
}
1199
return 0;
1200
}
1201
1202
/* Reject non-running interfaces */
1203
if(not (ifr.ifr_flags & IFF_RUNNING)){
1204
if(debug){
1205
fprintf(stderr, "Rejecting non-running interface \"%s\"\n",
1206
if_entry->d_name);
1207
}
1208
return 0;
1209
}
1210
1211
if(not good_flags(if_entry->d_name, &ifr)){
1212
return 0;
1213
}
1214
return 1;
1215
}
1216
1217
int notdotentries(const struct dirent *direntry){
1218
/* Skip "." and ".." */
1219
if(direntry->d_name[0] == '.'
1220
and (direntry->d_name[1] == '\0'
1221
or (direntry->d_name[1] == '.'
1222
and direntry->d_name[2] == '\0'))){
1223
return 0;
1224
}
1225
return 1;
1226
}
1227
1228
/* Is this directory entry a runnable program? */
1229
int runnable_hook(const struct dirent *direntry){
1230
int ret;
1231
struct stat st;
1232
1233
if((direntry->d_name)[0] == '\0'){
1234
/* Empty name? */
1235
return 0;
1236
}
1237
1238
/* Save pointer to last character */
1239
char *end = strchr(direntry->d_name, '\0')-1;
1240
1241
if(*end == '~'){
1242
/* Backup name~ */
1243
return 0;
1244
}
1245
1246
if(((direntry->d_name)[0] == '#')
1247
and (*end == '#')){
1248
/* Temporary #name# */
1249
return 0;
1250
}
1251
1252
/* XXX more rules here */
1253
1254
ret = stat(direntry->d_name, &st);
1255
if(ret == -1){
1256
if(debug){
1257
perror_plus("Could not stat plugin");
1258
}
1259
return 0;
1260
}
1261
if(not (S_ISREG(st.st_mode))){
1262
/* Not a regular file */
1263
return 0;
1264
}
1265
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1266
/* Not executable */
1267
return 0;
1268
}
1269
return 1;
1270
}
1271
1272
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1273
int ret;
1274
struct timespec now;
1275
struct timespec waited_time;
1276
intmax_t block_time;
1277
1278
while(true){
1279
if(mc.current_server == NULL){
1280
if (debug){
1281
fprintf(stderr,
1282
"Wait until first server is found. No timeout!\n");
1283
}
1284
ret = avahi_simple_poll_iterate(s, -1);
1285
} else {
1286
if (debug){
1287
fprintf(stderr, "Check current_server if we should run it,"
1288
" or wait\n");
1289
}
1290
/* the current time */
1291
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1292
if(ret == -1){
1293
perror_plus("clock_gettime");
1294
return -1;
1295
}
1296
/* Calculating in ms how long time between now and server
1297
who we visted longest time ago. Now - last seen. */
1298
waited_time.tv_sec = (now.tv_sec
1299
- mc.current_server->last_seen.tv_sec);
1300
waited_time.tv_nsec = (now.tv_nsec
1301
- mc.current_server->last_seen.tv_nsec);
1302
/* total time is 10s/10,000ms.
1303
Converting to s from ms by dividing by 1,000,
1304
and ns to ms by dividing by 1,000,000. */
1305
block_time = ((retry_interval
1306
- ((intmax_t)waited_time.tv_sec * 1000))
1307
- ((intmax_t)waited_time.tv_nsec / 1000000));
1308
1309
if (debug){
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1311
}
1312
1313
if(block_time <= 0){
1314
ret = start_mandos_communication(mc.current_server->ip,
1315
mc.current_server->port,
1316
mc.current_server->if_index,
1317
mc.current_server->af);
1318
if(ret == 0){
1319
avahi_simple_poll_quit(mc.simple_poll);
1320
return 0;
1321
}
1322
ret = clock_gettime(CLOCK_MONOTONIC,
1323
&mc.current_server->last_seen);
1324
if(ret == -1){
1325
perror_plus("clock_gettime");
1326
return -1;
1327
}
1328
mc.current_server = mc.current_server->next;
1329
block_time = 0; /* Call avahi to find new Mandos
1330
servers, but don't block */
1331
}
1332
1333
ret = avahi_simple_poll_iterate(s, (int)block_time);
1334
}
1335
if(ret != 0){
1336
if (ret > 0 or errno != EINTR) {
1337
return (ret != 1) ? ret : 0;
1338
}
1339
}
1340
}
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
1341
1120
}
1342
1121
1343
1122
int main(int argc, char *argv[]){
1362
1141
bool gnutls_initialized = false;
1363
1142
bool gpgme_initialized = false;
1364
1143
float delay = 2.5f;
1365
double retry_interval = 10; /* 10s between trying a server and
1366
retrying the same server again */
1367
1144
1368
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1369
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1375
1152
errno = 0;
1376
1153
ret = setgid(gid);
1377
1154
if(ret == -1){
1378
perror_plus("setgid");
1155
perror("setgid");
1379
1156
}
1380
1157
1381
1158
/* Lower user privileges (temporarily) */
1382
1159
errno = 0;
1383
1160
ret = seteuid(uid);
1384
1161
if(ret == -1){
1385
perror_plus("seteuid");
1162
perror("seteuid");
1386
1163
}
1387
1164
1388
1165
if(quit_now){
1423
1200
.arg = "SECONDS",
1424
1201
.doc = "Maximum delay to wait for interface startup",
1425
1202
.group = 2 },
1426
{ .name = "retry", .key = 132,
1427
.arg = "SECONDS",
1428
.doc = "Retry interval used when denied by the mandos server",
1429
.group = 2 },
1430
1203
/*
1431
1204
* These reproduce what we would get without ARGP_NO_HELP
1432
1205
*/
1476
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1477
1250
argp_error(state, "Bad delay");
1478
1251
}
1479
case 132: /* --retry */
1480
errno = 0;
1481
retry_interval = strtod(arg, &tmp);
1482
if(errno != 0 or tmp == arg or *tmp != '\0'
1483
or (retry_interval * 1000) > INT_MAX
1484
or retry_interval < 0){
1485
argp_error(state, "Bad retry interval");
1486
}
1487
1252
break;
1488
1253
/*
1489
1254
* These reproduce what we would get without ARGP_NO_HELP
1517
1282
case ENOMEM:
1518
1283
default:
1519
1284
errno = ret;
1520
perror_plus("argp_parse");
1285
perror("argp_parse");
1521
1286
exitcode = EX_OSERR;
1522
1287
goto end;
1523
1288
case EINVAL:
1525
1290
goto end;
1526
1291
}
1527
1292
}
1528
1529
{
1530
/* Work around Debian bug #633582:
1531
<http://bugs.debian.org/633582> */
1532
struct stat st;
1533
1534
/* Re-raise priviliges */
1535
errno = 0;
1536
ret = seteuid(0);
1537
if(ret == -1){
1538
perror_plus("seteuid");
1539
}
1540
1541
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1542
int seckey_fd = open(seckey, O_RDONLY);
1543
if(seckey_fd == -1){
1544
perror_plus("open");
1545
} else {
1546
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1547
if(ret == -1){
1548
perror_plus("fstat");
1549
} else {
1550
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1551
ret = fchown(seckey_fd, uid, gid);
1552
if(ret == -1){
1553
perror_plus("fchown");
1554
}
1555
}
1556
}
1557
TEMP_FAILURE_RETRY(close(seckey_fd));
1558
}
1559
}
1560
1561
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1562
int pubkey_fd = open(pubkey, O_RDONLY);
1563
if(pubkey_fd == -1){
1564
perror_plus("open");
1565
} else {
1566
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1567
if(ret == -1){
1568
perror_plus("fstat");
1569
} else {
1570
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1571
ret = fchown(pubkey_fd, uid, gid);
1572
if(ret == -1){
1573
perror_plus("fchown");
1574
}
1575
}
1576
}
1577
TEMP_FAILURE_RETRY(close(pubkey_fd));
1578
}
1579
}
1580
1581
/* Lower privileges */
1582
errno = 0;
1583
ret = seteuid(uid);
1584
if(ret == -1){
1585
perror_plus("seteuid");
1586
}
1587
}
1588
1589
/* Find network hooks and run them */
1590
{
1591
struct dirent **direntries;
1592
struct dirent *direntry;
1593
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1594
alphasort);
1595
int devnull = open("/dev/null", O_RDONLY);
1596
for(int i = 0; i < numhooks; i++){
1597
direntry = direntries[0];
1598
char *fullname = NULL;
1599
ret = asprintf(&fullname, "%s/%s", tempdir,
1600
direntry->d_name);
1601
if(ret < 0){
1602
perror_plus("asprintf");
1603
continue;
1604
}
1605
pid_t hook_pid = fork();
1606
if(hook_pid == 0){
1607
/* Child */
1608
dup2(devnull, STDIN_FILENO);
1609
close(devnull);
1610
dup2(STDERR_FILENO, STDOUT_FILENO);
1611
setenv("DEVICE", interface, 1);
1612
setenv("VERBOSE", debug ? "1" : "0", 1);
1613
setenv("MODE", "start", 1);
1614
/* setenv( XXX more here */
1615
ret = execl(fullname, direntry->d_name, "start", NULL);
1616
perror_plus("execl");
1617
}
1618
free(fullname);
1619
if(quit_now){
1620
goto end;
1621
}
1622
}
1623
close(devnull);
1624
}
1625
1293
1626
1294
if(not debug){
1627
1295
avahi_set_log_function(empty_log);
1628
1296
}
1629
1297
1630
1298
if(interface[0] == '\0'){
1631
1299
struct dirent **direntries;
1632
/* First look for interfaces that are up */
1633
ret = scandir(sys_class_net, &direntries, up_interface,
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1634
1301
alphasort);
1635
if(ret == 0){
1636
/* No up interfaces, look for any good interfaces */
1637
free(direntries);
1638
ret = scandir(sys_class_net, &direntries, good_interface,
1639
alphasort);
1640
}
1641
1302
if(ret >= 1){
1642
/* Pick the first interface returned */
1303
/* Pick the first good interface */
1643
1304
interface = strdup(direntries[0]->d_name);
1644
1305
if(debug){
1645
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1646
1307
}
1647
1308
if(interface == NULL){
1648
perror_plus("malloc");
1309
perror("malloc");
1649
1310
free(direntries);
1650
1311
exitcode = EXIT_FAILURE;
1651
1312
goto end;
1673
1334
sigemptyset(&sigterm_action.sa_mask);
1674
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1675
1336
if(ret == -1){
1676
perror_plus("sigaddset");
1337
perror("sigaddset");
1677
1338
exitcode = EX_OSERR;
1678
1339
goto end;
1679
1340
}
1680
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1681
1342
if(ret == -1){
1682
perror_plus("sigaddset");
1343
perror("sigaddset");
1683
1344
exitcode = EX_OSERR;
1684
1345
goto end;
1685
1346
}
1686
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1687
1348
if(ret == -1){
1688
perror_plus("sigaddset");
1349
perror("sigaddset");
1689
1350
exitcode = EX_OSERR;
1690
1351
goto end;
1691
1352
}
1695
1356
*/
1696
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1697
1358
if(ret == -1){
1698
perror_plus("sigaction");
1359
perror("sigaction");
1699
1360
return EX_OSERR;
1700
1361
}
1701
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
1702
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
1703
1364
if(ret == -1){
1704
perror_plus("sigaction");
1365
perror("sigaction");
1705
1366
exitcode = EX_OSERR;
1706
1367
goto end;
1707
1368
}
1708
1369
}
1709
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1710
1371
if(ret == -1){
1711
perror_plus("sigaction");
1372
perror("sigaction");
1712
1373
return EX_OSERR;
1713
1374
}
1714
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
1715
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1716
1377
if(ret == -1){
1717
perror_plus("sigaction");
1378
perror("sigaction");
1718
1379
exitcode = EX_OSERR;
1719
1380
goto end;
1720
1381
}
1721
1382
}
1722
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1723
1384
if(ret == -1){
1724
perror_plus("sigaction");
1385
perror("sigaction");
1725
1386
return EX_OSERR;
1726
1387
}
1727
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
1728
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1729
1390
if(ret == -1){
1730
perror_plus("sigaction");
1391
perror("sigaction");
1731
1392
exitcode = EX_OSERR;
1732
1393
goto end;
1733
1394
}
1750
1411
errno = 0;
1751
1412
ret = seteuid(0);
1752
1413
if(ret == -1){
1753
perror_plus("seteuid");
1414
perror("seteuid");
1754
1415
}
1755
1416
1756
1417
#ifdef __linux__
1760
1421
bool restore_loglevel = true;
1761
1422
if(ret == -1){
1762
1423
restore_loglevel = false;
1763
perror_plus("klogctl");
1424
perror("klogctl");
1764
1425
}
1765
1426
#endif /* __linux__ */
1766
1427
1767
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1768
1429
if(sd < 0){
1769
perror_plus("socket");
1430
perror("socket");
1770
1431
exitcode = EX_OSERR;
1771
1432
#ifdef __linux__
1772
1433
if(restore_loglevel){
1773
1434
ret = klogctl(7, NULL, 0);
1774
1435
if(ret == -1){
1775
perror_plus("klogctl");
1436
perror("klogctl");
1776
1437
}
1777
1438
}
1778
1439
#endif /* __linux__ */
1780
1441
errno = 0;
1781
1442
ret = seteuid(uid);
1782
1443
if(ret == -1){
1783
perror_plus("seteuid");
1444
perror("seteuid");
1784
1445
}
1785
1446
goto end;
1786
1447
}
1787
1448
strcpy(network.ifr_name, interface);
1788
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1789
1450
if(ret == -1){
1790
perror_plus("ioctl SIOCGIFFLAGS");
1451
perror("ioctl SIOCGIFFLAGS");
1791
1452
#ifdef __linux__
1792
1453
if(restore_loglevel){
1793
1454
ret = klogctl(7, NULL, 0);
1794
1455
if(ret == -1){
1795
perror_plus("klogctl");
1456
perror("klogctl");
1796
1457
}
1797
1458
}
1798
1459
#endif /* __linux__ */
1801
1462
errno = 0;
1802
1463
ret = seteuid(uid);
1803
1464
if(ret == -1){
1804
perror_plus("seteuid");
1465
perror("seteuid");
1805
1466
}
1806
1467
goto end;
1807
1468
}
1811
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1812
1473
if(ret == -1){
1813
1474
take_down_interface = false;
1814
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1815
1476
exitcode = EX_OSERR;
1816
1477
#ifdef __linux__
1817
1478
if(restore_loglevel){
1818
1479
ret = klogctl(7, NULL, 0);
1819
1480
if(ret == -1){
1820
perror_plus("klogctl");
1481
perror("klogctl");
1821
1482
}
1822
1483
}
1823
1484
#endif /* __linux__ */
1825
1486
errno = 0;
1826
1487
ret = seteuid(uid);
1827
1488
if(ret == -1){
1828
perror_plus("seteuid");
1489
perror("seteuid");
1829
1490
}
1830
1491
goto end;
1831
1492
}
1832
1493
}
1833
/* Sleep checking until interface is running.
1834
Check every 0.25s, up to total time of delay */
1494
/* sleep checking until interface is running */
1835
1495
for(int i=0; i < delay * 4; i++){
1836
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1837
1497
if(ret == -1){
1838
perror_plus("ioctl SIOCGIFFLAGS");
1498
perror("ioctl SIOCGIFFLAGS");
1839
1499
} else if(network.ifr_flags & IFF_RUNNING){
1840
1500
break;
1841
1501
}
1842
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
1843
1503
ret = nanosleep(&sleeptime, NULL);
1844
1504
if(ret == -1 and errno != EINTR){
1845
perror_plus("nanosleep");
1505
perror("nanosleep");
1846
1506
}
1847
1507
}
1848
1508
if(not take_down_interface){
1849
1509
/* We won't need the socket anymore */
1850
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1851
1511
if(ret == -1){
1852
perror_plus("close");
1512
perror("close");
1853
1513
}
1854
1514
}
1855
1515
#ifdef __linux__
1857
1517
/* Restores kernel loglevel to default */
1858
1518
ret = klogctl(7, NULL, 0);
1859
1519
if(ret == -1){
1860
perror_plus("klogctl");
1520
perror("klogctl");
1861
1521
}
1862
1522
}
1863
1523
#endif /* __linux__ */
1867
1527
/* Lower privileges */
1868
1528
ret = seteuid(uid);
1869
1529
if(ret == -1){
1870
perror_plus("seteuid");
1530
perror("seteuid");
1871
1531
}
1872
1532
} else {
1873
1533
/* Lower privileges permanently */
1874
1534
ret = setuid(uid);
1875
1535
if(ret == -1){
1876
perror_plus("setuid");
1536
perror("setuid");
1877
1537
}
1878
1538
}
1879
1539
}
1895
1555
goto end;
1896
1556
}
1897
1557
1558
tempdir_created = true;
1898
1559
if(mkdtemp(tempdir) == NULL){
1899
perror_plus("mkdtemp");
1560
tempdir_created = false;
1561
perror("mkdtemp");
1900
1562
goto end;
1901
1563
}
1902
tempdir_created = true;
1903
1564
1904
1565
if(quit_now){
1905
1566
goto end;
1947
1608
1948
1609
port = (uint16_t)tmpmax;
1949
1610
*address = '\0';
1611
address = connect_to;
1950
1612
/* Colon in address indicates IPv6 */
1951
1613
int af;
1952
if(strchr(connect_to, ':') != NULL){
1614
if(strchr(address, ':') != NULL){
1953
1615
af = AF_INET6;
1954
/* Accept [] around IPv6 address - see RFC 5952 */
1955
if(connect_to[0] == '[' and address[-1] == ']')
1956
{
1957
connect_to++;
1958
address[-1] = '\0';
1959
}
1960
1616
} else {
1961
1617
af = AF_INET;
1962
1618
}
1963
address = connect_to;
1964
1619
1965
1620
if(quit_now){
1966
1621
goto end;
1967
1622
}
1968
1623
1969
1624
while(not quit_now){
1970
1625
ret = start_mandos_communication(address, port, if_index, af);
1971
1626
if(quit_now or ret == 0){
1972
1627
break;
1973
1628
}
1974
if(debug){
1975
fprintf(stderr, "Retrying in %d seconds\n",
1976
(int)retry_interval);
1977
}
1978
sleep((int)retry_interval);
1979
}
1980
1629
sleep(15);
1630
};
1631
1981
1632
if (not quit_now){
1982
1633
exitcode = EXIT_SUCCESS;
1983
1634
}
1984
1635
1985
1636
goto end;
1986
1637
}
1987
1638
2039
1690
if(debug){
2040
1691
fprintf(stderr, "Starting Avahi loop search\n");
2041
1692
}
2042
2043
ret = avahi_loop_with_timeout(mc.simple_poll,
2044
(int)(retry_interval * 1000));
2045
if(debug){
2046
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2047
(ret == 0) ? "successfully" : "with error");
2048
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
2049
1695
2050
1696
end:
2051
1697
2072
1718
if(gpgme_initialized){
2073
1719
gpgme_release(mc.ctx);
2074
1720
}
2075
2076
/* Cleans up the circular linked list of Mandos servers the client
2077
has seen */
2078
if(mc.current_server != NULL){
2079
mc.current_server->prev->next = NULL;
2080
while(mc.current_server != NULL){
2081
server *next = mc.current_server->next;
2082
free(mc.current_server);
2083
mc.current_server = next;
2084
}
2085
}
2086
2087
/* XXX run network hooks "stop" here */
2088
1721
2089
1722
/* Take down the network interface */
2090
1723
if(take_down_interface){
2092
1725
errno = 0;
2093
1726
ret = seteuid(0);
2094
1727
if(ret == -1){
2095
perror_plus("seteuid");
1728
perror("seteuid");
2096
1729
}
2097
1730
if(geteuid() == 0){
2098
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2099
1732
if(ret == -1){
2100
perror_plus("ioctl SIOCGIFFLAGS");
1733
perror("ioctl SIOCGIFFLAGS");
2101
1734
} else if(network.ifr_flags & IFF_UP) {
2102
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2103
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2104
1737
if(ret == -1){
2105
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2106
1739
}
2107
1740
}
2108
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2109
1742
if(ret == -1){
2110
perror_plus("close");
1743
perror("close");
2111
1744
}
2112
1745
/* Lower privileges permanently */
2113
1746
errno = 0;
2114
1747
ret = setuid(uid);
2115
1748
if(ret == -1){
2116
perror_plus("setuid");
1749
perror("setuid");
2117
1750
}
2118
1751
}
2119
1752
}
2120
1753
2121
/* Removes the GPGME temp directory and all files inside */
1754
/* Removes the temp directory used by GPGME */
2122
1755
if(tempdir_created){
2123
struct dirent **direntries = NULL;
2124
struct dirent *direntry = NULL;
2125
int numentries = scandir(tempdir, &direntries, notdotentries,
2126
alphasort);
2127
if (numentries > 0){
2128
for(int i = 0; i < numentries; i++){
2129
direntry = direntries[i];
1756
DIR *d;
1757
struct dirent *direntry;
1758
d = opendir(tempdir);
1759
if(d == NULL){
1760
if(errno != ENOENT){
1761
perror("opendir");
1762
}
1763
} else {
1764
while(true){
1765
direntry = readdir(d);
1766
if(direntry == NULL){
1767
break;
1768
}
1769
/* Skip "." and ".." */
1770
if(direntry->d_name[0] == '.'
1771
and (direntry->d_name[1] == '\0'
1772
or (direntry->d_name[1] == '.'
1773
and direntry->d_name[2] == '\0'))){
1774
continue;
1775
}
2130
1776
char *fullname = NULL;
2131
1777
ret = asprintf(&fullname, "%s/%s", tempdir,
2132
1778
direntry->d_name);
2133
1779
if(ret < 0){
2134
perror_plus("asprintf");
1780
perror("asprintf");
2135
1781
continue;
2136
1782
}
2137
1783
ret = remove(fullname);
2141
1787
}
2142
1788
free(fullname);
2143
1789
}
2144
}
2145
2146
/* need to clean even if 0 because man page doesn't specify */
2147
free(direntries);
2148
if (numentries == -1){
2149
perror_plus("scandir");
1790
closedir(d);
2150
1791
}
2151
1792
ret = rmdir(tempdir);
2152
1793
if(ret == -1 and errno != ENOENT){
2153
perror_plus("rmdir");
1794
perror("rmdir");
2154
1795
}
2155
1796
}
2156
1797
2161
1802
&old_sigterm_action,
2162
1803
NULL));
2163
1804
if(ret == -1){
2164
perror_plus("sigaction");
1805
perror("sigaction");
2165
1806
}
2166
1807
do {
2167
1808
ret = raise(signal_received);
2168
1809
} while(ret != 0 and errno == EINTR);
2169
1810
if(ret != 0){
2170
perror_plus("raise");
1811
perror("raise");
2171
1812
abort();
2172
1813
}
2173
1814
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0