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- Committer: teddy at bsnet
- Date: 2011-11-11 20:19:01 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@fukt.bsnet.se-20111111201901-a92of11prspld20x
* plugins.d/mandos-client.c (main): Add "DELAY" environment variable.
Check return value from setenv().
Check return value from setenv().
- files added:
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.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() */
56
#include <sys/stat.h> /* open(), S_ISREG */
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 */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
66
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
76
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
122
123
#define PATHDIR "/conf/conf.d/mandos"
123
124
#define SECKEY "seckey.txt"
124
125
#define PUBKEY "pubkey.txt"
126
#define HOOKDIR "/lib/mandos/network-hooks.d"
125
127
126
128
bool debug = false;
127
129
static const char mandos_protocol_version[] = "1";
128
130
const char *argp_program_version = "mandos-client " VERSION;
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
131
const char *argp_program_bug_address = "<mandos@recompile.se>";
130
132
static const char sys_class_net[] = "/sys/class/net";
131
133
char *connect_to = NULL;
132
134
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
133
146
/* Used for passing in values through the Avahi callback functions */
134
147
typedef struct {
135
148
AvahiSimplePoll *simple_poll;
139
152
gnutls_dh_params_t dh_params;
140
153
const char *priority;
141
154
gpgme_ctx_t ctx;
155
server *current_server;
142
156
} mandos_context;
143
157
144
158
/* global context so signal handler can reach it*/
145
159
mandos_context mc = { .simple_poll = NULL, .server = NULL,
146
160
.dh_bits = 1024, .priority = "SECURE256"
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
161
":!CTYPE-X.509:+CTYPE-OPENPGP",
162
.current_server = NULL };
148
163
149
164
sig_atomic_t quit_now = 0;
150
165
int signal_received = 0;
151
166
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
152
174
/*
153
175
* Make additional room in "buffer" for at least BUFFER_SIZE more
154
176
* bytes. "buffer_capacity" is how much is currently allocated,
166
188
return buffer_capacity;
167
189
}
168
190
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
169
229
/*
170
230
* Initialize GPGME.
171
231
*/
185
245
186
246
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
187
247
if(fd == -1){
188
perror("open");
248
perror_plus("open");
189
249
return false;
190
250
}
191
251
205
265
206
266
ret = (int)TEMP_FAILURE_RETRY(close(fd));
207
267
if(ret == -1){
208
perror("close");
268
perror_plus("close");
209
269
}
210
270
gpgme_data_release(pgp_data);
211
271
return true;
224
284
return false;
225
285
}
226
286
227
/* Set GPGME home directory for the OpenPGP engine only */
287
/* Set GPGME home directory for the OpenPGP engine only */
228
288
rc = gpgme_get_engine_info(&engine_info);
229
289
if(rc != GPG_ERR_NO_ERROR){
230
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
336
396
337
397
/* Seek back to the beginning of the GPGME plaintext data buffer */
338
398
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
339
perror("gpgme_data_seek");
399
perror_plus("gpgme_data_seek");
340
400
plaintext_length = -1;
341
401
goto decrypt_end;
342
402
}
347
407
(size_t)plaintext_length,
348
408
plaintext_capacity);
349
409
if(plaintext_capacity == 0){
350
perror("incbuffer");
410
perror_plus("incbuffer");
351
411
plaintext_length = -1;
352
412
goto decrypt_end;
353
413
}
360
420
break;
361
421
}
362
422
if(ret < 0){
363
perror("gpgme_data_read");
423
perror_plus("gpgme_data_read");
364
424
plaintext_length = -1;
365
425
goto decrypt_end;
366
426
}
423
483
}
424
484
425
485
/* OpenPGP credentials */
426
gnutls_certificate_allocate_credentials(&mc.cred);
486
ret = gnutls_certificate_allocate_credentials(&mc.cred);
427
487
if(ret != GNUTLS_E_SUCCESS){
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
488
fprintf(stderr, "GnuTLS memory error: %s\n",
432
489
safer_gnutls_strerror(ret));
433
490
gnutls_global_deinit();
434
491
return -1;
589
646
tcp_sd = socket(pf, SOCK_STREAM, 0);
590
647
if(tcp_sd < 0){
591
648
int e = errno;
592
perror("socket");
649
perror_plus("socket");
593
650
errno = e;
594
651
goto mandos_end;
595
652
}
609
666
}
610
667
if(ret < 0 ){
611
668
int e = errno;
612
perror("inet_pton");
669
perror_plus("inet_pton");
613
670
errno = e;
614
671
goto mandos_end;
615
672
}
651
708
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
652
709
char interface[IF_NAMESIZE];
653
710
if(if_indextoname((unsigned int)if_index, interface) == NULL){
654
perror("if_indextoname");
711
perror_plus("if_indextoname");
655
712
} else {
656
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
714
ip, interface, port);
671
728
sizeof(addrstr));
672
729
}
673
730
if(pcret == NULL){
674
perror("inet_ntop");
731
perror_plus("inet_ntop");
675
732
} else {
676
733
if(strcmp(addrstr, ip) != 0){
677
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
692
749
if(ret < 0){
693
750
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
751
int e = errno;
695
perror("connect");
752
perror_plus("connect");
696
753
errno = e;
697
754
}
698
755
goto mandos_end;
711
768
out_size - written));
712
769
if(ret == -1){
713
770
int e = errno;
714
perror("write");
771
perror_plus("write");
715
772
errno = e;
716
773
goto mandos_end;
717
774
}
742
799
goto mandos_end;
743
800
}
744
801
802
/* Spurious warning from -Wint-to-pointer-cast */
745
803
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
746
804
747
805
if(quit_now){
784
842
buffer_capacity);
785
843
if(buffer_capacity == 0){
786
844
int e = errno;
787
perror("incbuffer");
845
perror_plus("incbuffer");
788
846
errno = e;
789
847
goto mandos_end;
790
848
}
895
953
if(e == 0){
896
954
e = errno;
897
955
}
898
perror("close");
956
perror_plus("close");
899
957
}
900
958
gnutls_deinit(session);
959
errno = e;
901
960
if(quit_now){
902
e = EINTR;
961
errno = EINTR;
903
962
retval = -1;
904
963
}
905
errno = e;
906
964
}
907
965
return retval;
908
966
}
951
1009
avahi_proto_to_af(proto));
952
1010
if(ret == 0){
953
1011
avahi_simple_poll_quit(mc.simple_poll);
1012
} else {
1013
ret = add_server(ip, port, interface,
1014
avahi_proto_to_af(proto));
954
1015
}
955
1016
}
956
1017
}
1010
1071
}
1011
1072
}
1012
1073
1013
/* stop main loop after sigterm has been called */
1074
/* Signal handler that stops main loop after SIGTERM */
1014
1075
static void handle_sigterm(int sig){
1015
1076
if(quit_now){
1016
1077
return;
1018
1079
quit_now = 1;
1019
1080
signal_received = sig;
1020
1081
int old_errno = errno;
1082
/* set main loop to exit */
1021
1083
if(mc.simple_poll != NULL){
1022
1084
avahi_simple_poll_quit(mc.simple_poll);
1023
1085
}
1024
1086
errno = old_errno;
1025
1087
}
1026
1088
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){
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){
1081
1100
if(debug){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1101
perror_plus("ioctl SIOCGIFFLAGS");
1084
1102
}
1085
free(flagstring);
1086
return 0;
1103
return false;
1087
1104
}
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1105
return true;
1106
}
1107
1108
bool good_flags(const char *ifname, const struct ifreq *ifr){
1109
1090
1110
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1111
if(ifr->ifr_flags & IFF_LOOPBACK){
1092
1112
if(debug){
1093
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1114
ifname);
1095
1115
}
1096
return 0;
1116
return false;
1097
1117
}
1098
1118
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1119
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1100
1120
if(debug){
1101
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1122
ifname);
1103
1123
}
1104
return 1;
1124
return true;
1105
1125
}
1106
1126
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1127
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1108
1128
if(debug){
1109
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
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
1114
1142
/* Accept this device */
1115
1143
if(debug){
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
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
}
1120
1341
}
1121
1342
1122
1343
int main(int argc, char *argv[]){
1141
1362
bool gnutls_initialized = false;
1142
1363
bool gpgme_initialized = false;
1143
1364
float delay = 2.5f;
1365
double retry_interval = 10; /* 10s between trying a server and
1366
retrying the same server again */
1144
1367
1145
1368
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1146
1369
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1152
1375
errno = 0;
1153
1376
ret = setgid(gid);
1154
1377
if(ret == -1){
1155
perror("setgid");
1378
perror_plus("setgid");
1156
1379
}
1157
1380
1158
1381
/* Lower user privileges (temporarily) */
1159
1382
errno = 0;
1160
1383
ret = seteuid(uid);
1161
1384
if(ret == -1){
1162
perror("seteuid");
1385
perror_plus("seteuid");
1163
1386
}
1164
1387
1165
1388
if(quit_now){
1200
1423
.arg = "SECONDS",
1201
1424
.doc = "Maximum delay to wait for interface startup",
1202
1425
.group = 2 },
1426
{ .name = "retry", .key = 132,
1427
.arg = "SECONDS",
1428
.doc = "Retry interval used when denied by the mandos server",
1429
.group = 2 },
1203
1430
/*
1204
1431
* These reproduce what we would get without ARGP_NO_HELP
1205
1432
*/
1249
1476
if(errno != 0 or tmp == arg or *tmp != '\0'){
1250
1477
argp_error(state, "Bad delay");
1251
1478
}
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
}
1252
1487
break;
1253
1488
/*
1254
1489
* These reproduce what we would get without ARGP_NO_HELP
1282
1517
case ENOMEM:
1283
1518
default:
1284
1519
errno = ret;
1285
perror("argp_parse");
1520
perror_plus("argp_parse");
1286
1521
exitcode = EX_OSERR;
1287
1522
goto end;
1288
1523
case EINVAL:
1290
1525
goto end;
1291
1526
}
1292
1527
}
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
ret = setenv("DEVICE", interface, 1);
1612
if(ret == -1){
1613
perror_plus("setenv");
1614
exit(1);
1615
}
1616
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1617
if(ret == -1){
1618
perror_plus("setenv");
1619
exit(1);
1620
}
1621
ret = setenv("MODE", "start", 1);
1622
if(ret == -1){
1623
perror_plus("setenv");
1624
exit(1);
1625
}
1626
char *delaystring;
1627
ret = asprintf(&delaystring, "%f", delay);
1628
if(ret == -1){
1629
perror_plus("asprintf");
1630
exit(1);
1631
}
1632
ret = setenv("DELAY", delaystring, 1);
1633
if(ret == -1){
1634
free(delaystring);
1635
perror_plus("setenv");
1636
exit(1);
1637
}
1638
free(delaystring);
1639
ret = execl(fullname, direntry->d_name, "start", NULL);
1640
perror_plus("execl");
1641
}
1642
free(fullname);
1643
if(quit_now){
1644
goto end;
1645
}
1646
}
1647
close(devnull);
1648
}
1293
1649
1294
1650
if(not debug){
1295
1651
avahi_set_log_function(empty_log);
1296
1652
}
1297
1653
1298
1654
if(interface[0] == '\0'){
1299
1655
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1656
/* First look for interfaces that are up */
1657
ret = scandir(sys_class_net, &direntries, up_interface,
1301
1658
alphasort);
1659
if(ret == 0){
1660
/* No up interfaces, look for any good interfaces */
1661
free(direntries);
1662
ret = scandir(sys_class_net, &direntries, good_interface,
1663
alphasort);
1664
}
1302
1665
if(ret >= 1){
1303
/* Pick the first good interface */
1666
/* Pick the first interface returned */
1304
1667
interface = strdup(direntries[0]->d_name);
1305
1668
if(debug){
1306
1669
fprintf(stderr, "Using interface \"%s\"\n", interface);
1307
1670
}
1308
1671
if(interface == NULL){
1309
perror("malloc");
1672
perror_plus("malloc");
1310
1673
free(direntries);
1311
1674
exitcode = EXIT_FAILURE;
1312
1675
goto end;
1334
1697
sigemptyset(&sigterm_action.sa_mask);
1335
1698
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1336
1699
if(ret == -1){
1337
perror("sigaddset");
1700
perror_plus("sigaddset");
1338
1701
exitcode = EX_OSERR;
1339
1702
goto end;
1340
1703
}
1341
1704
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1342
1705
if(ret == -1){
1343
perror("sigaddset");
1706
perror_plus("sigaddset");
1344
1707
exitcode = EX_OSERR;
1345
1708
goto end;
1346
1709
}
1347
1710
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1348
1711
if(ret == -1){
1349
perror("sigaddset");
1712
perror_plus("sigaddset");
1350
1713
exitcode = EX_OSERR;
1351
1714
goto end;
1352
1715
}
1356
1719
*/
1357
1720
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1358
1721
if(ret == -1){
1359
perror("sigaction");
1722
perror_plus("sigaction");
1360
1723
return EX_OSERR;
1361
1724
}
1362
1725
if(old_sigterm_action.sa_handler != SIG_IGN){
1363
1726
ret = sigaction(SIGINT, &sigterm_action, NULL);
1364
1727
if(ret == -1){
1365
perror("sigaction");
1728
perror_plus("sigaction");
1366
1729
exitcode = EX_OSERR;
1367
1730
goto end;
1368
1731
}
1369
1732
}
1370
1733
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1371
1734
if(ret == -1){
1372
perror("sigaction");
1735
perror_plus("sigaction");
1373
1736
return EX_OSERR;
1374
1737
}
1375
1738
if(old_sigterm_action.sa_handler != SIG_IGN){
1376
1739
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1377
1740
if(ret == -1){
1378
perror("sigaction");
1741
perror_plus("sigaction");
1379
1742
exitcode = EX_OSERR;
1380
1743
goto end;
1381
1744
}
1382
1745
}
1383
1746
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1384
1747
if(ret == -1){
1385
perror("sigaction");
1748
perror_plus("sigaction");
1386
1749
return EX_OSERR;
1387
1750
}
1388
1751
if(old_sigterm_action.sa_handler != SIG_IGN){
1389
1752
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1390
1753
if(ret == -1){
1391
perror("sigaction");
1754
perror_plus("sigaction");
1392
1755
exitcode = EX_OSERR;
1393
1756
goto end;
1394
1757
}
1411
1774
errno = 0;
1412
1775
ret = seteuid(0);
1413
1776
if(ret == -1){
1414
perror("seteuid");
1777
perror_plus("seteuid");
1415
1778
}
1416
1779
1417
1780
#ifdef __linux__
1421
1784
bool restore_loglevel = true;
1422
1785
if(ret == -1){
1423
1786
restore_loglevel = false;
1424
perror("klogctl");
1787
perror_plus("klogctl");
1425
1788
}
1426
1789
#endif /* __linux__ */
1427
1790
1428
1791
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1429
1792
if(sd < 0){
1430
perror("socket");
1793
perror_plus("socket");
1431
1794
exitcode = EX_OSERR;
1432
1795
#ifdef __linux__
1433
1796
if(restore_loglevel){
1434
1797
ret = klogctl(7, NULL, 0);
1435
1798
if(ret == -1){
1436
perror("klogctl");
1799
perror_plus("klogctl");
1437
1800
}
1438
1801
}
1439
1802
#endif /* __linux__ */
1441
1804
errno = 0;
1442
1805
ret = seteuid(uid);
1443
1806
if(ret == -1){
1444
perror("seteuid");
1807
perror_plus("seteuid");
1445
1808
}
1446
1809
goto end;
1447
1810
}
1448
1811
strcpy(network.ifr_name, interface);
1449
1812
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1450
1813
if(ret == -1){
1451
perror("ioctl SIOCGIFFLAGS");
1814
perror_plus("ioctl SIOCGIFFLAGS");
1452
1815
#ifdef __linux__
1453
1816
if(restore_loglevel){
1454
1817
ret = klogctl(7, NULL, 0);
1455
1818
if(ret == -1){
1456
perror("klogctl");
1819
perror_plus("klogctl");
1457
1820
}
1458
1821
}
1459
1822
#endif /* __linux__ */
1462
1825
errno = 0;
1463
1826
ret = seteuid(uid);
1464
1827
if(ret == -1){
1465
perror("seteuid");
1828
perror_plus("seteuid");
1466
1829
}
1467
1830
goto end;
1468
1831
}
1472
1835
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1473
1836
if(ret == -1){
1474
1837
take_down_interface = false;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1838
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1476
1839
exitcode = EX_OSERR;
1477
1840
#ifdef __linux__
1478
1841
if(restore_loglevel){
1479
1842
ret = klogctl(7, NULL, 0);
1480
1843
if(ret == -1){
1481
perror("klogctl");
1844
perror_plus("klogctl");
1482
1845
}
1483
1846
}
1484
1847
#endif /* __linux__ */
1486
1849
errno = 0;
1487
1850
ret = seteuid(uid);
1488
1851
if(ret == -1){
1489
perror("seteuid");
1852
perror_plus("seteuid");
1490
1853
}
1491
1854
goto end;
1492
1855
}
1493
1856
}
1494
/* sleep checking until interface is running */
1857
/* Sleep checking until interface is running.
1858
Check every 0.25s, up to total time of delay */
1495
1859
for(int i=0; i < delay * 4; i++){
1496
1860
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1497
1861
if(ret == -1){
1498
perror("ioctl SIOCGIFFLAGS");
1862
perror_plus("ioctl SIOCGIFFLAGS");
1499
1863
} else if(network.ifr_flags & IFF_RUNNING){
1500
1864
break;
1501
1865
}
1502
1866
struct timespec sleeptime = { .tv_nsec = 250000000 };
1503
1867
ret = nanosleep(&sleeptime, NULL);
1504
1868
if(ret == -1 and errno != EINTR){
1505
perror("nanosleep");
1869
perror_plus("nanosleep");
1506
1870
}
1507
1871
}
1508
1872
if(not take_down_interface){
1509
1873
/* We won't need the socket anymore */
1510
1874
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1511
1875
if(ret == -1){
1512
perror("close");
1876
perror_plus("close");
1513
1877
}
1514
1878
}
1515
1879
#ifdef __linux__
1517
1881
/* Restores kernel loglevel to default */
1518
1882
ret = klogctl(7, NULL, 0);
1519
1883
if(ret == -1){
1520
perror("klogctl");
1884
perror_plus("klogctl");
1521
1885
}
1522
1886
}
1523
1887
#endif /* __linux__ */
1527
1891
/* Lower privileges */
1528
1892
ret = seteuid(uid);
1529
1893
if(ret == -1){
1530
perror("seteuid");
1894
perror_plus("seteuid");
1531
1895
}
1532
1896
} else {
1533
1897
/* Lower privileges permanently */
1534
1898
ret = setuid(uid);
1535
1899
if(ret == -1){
1536
perror("setuid");
1900
perror_plus("setuid");
1537
1901
}
1538
1902
}
1539
1903
}
1555
1919
goto end;
1556
1920
}
1557
1921
1922
if(mkdtemp(tempdir) == NULL){
1923
perror_plus("mkdtemp");
1924
goto end;
1925
}
1558
1926
tempdir_created = true;
1559
if(mkdtemp(tempdir) == NULL){
1560
tempdir_created = false;
1561
perror("mkdtemp");
1562
goto end;
1563
}
1564
1927
1565
1928
if(quit_now){
1566
1929
goto end;
1608
1971
1609
1972
port = (uint16_t)tmpmax;
1610
1973
*address = '\0';
1611
address = connect_to;
1612
1974
/* Colon in address indicates IPv6 */
1613
1975
int af;
1614
if(strchr(address, ':') != NULL){
1976
if(strchr(connect_to, ':') != NULL){
1615
1977
af = AF_INET6;
1978
/* Accept [] around IPv6 address - see RFC 5952 */
1979
if(connect_to[0] == '[' and address[-1] == ']')
1980
{
1981
connect_to++;
1982
address[-1] = '\0';
1983
}
1616
1984
} else {
1617
1985
af = AF_INET;
1618
1986
}
1987
address = connect_to;
1619
1988
1620
1989
if(quit_now){
1621
1990
goto end;
1622
1991
}
1623
1992
1624
1993
while(not quit_now){
1625
1994
ret = start_mandos_communication(address, port, if_index, af);
1626
1995
if(quit_now or ret == 0){
1627
1996
break;
1628
1997
}
1629
sleep(15);
1630
};
1631
1998
if(debug){
1999
fprintf(stderr, "Retrying in %d seconds\n",
2000
(int)retry_interval);
2001
}
2002
sleep((int)retry_interval);
2003
}
2004
1632
2005
if (not quit_now){
1633
2006
exitcode = EXIT_SUCCESS;
1634
2007
}
1635
2008
1636
2009
goto end;
1637
2010
}
1638
2011
1690
2063
if(debug){
1691
2064
fprintf(stderr, "Starting Avahi loop search\n");
1692
2065
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
2066
2067
ret = avahi_loop_with_timeout(mc.simple_poll,
2068
(int)(retry_interval * 1000));
2069
if(debug){
2070
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2071
(ret == 0) ? "successfully" : "with error");
2072
}
1695
2073
1696
2074
end:
1697
2075
1718
2096
if(gpgme_initialized){
1719
2097
gpgme_release(mc.ctx);
1720
2098
}
2099
2100
/* Cleans up the circular linked list of Mandos servers the client
2101
has seen */
2102
if(mc.current_server != NULL){
2103
mc.current_server->prev->next = NULL;
2104
while(mc.current_server != NULL){
2105
server *next = mc.current_server->next;
2106
free(mc.current_server);
2107
mc.current_server = next;
2108
}
2109
}
2110
2111
/* XXX run network hooks "stop" here */
1721
2112
1722
2113
/* Take down the network interface */
1723
2114
if(take_down_interface){
1725
2116
errno = 0;
1726
2117
ret = seteuid(0);
1727
2118
if(ret == -1){
1728
perror("seteuid");
2119
perror_plus("seteuid");
1729
2120
}
1730
2121
if(geteuid() == 0){
1731
2122
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1732
2123
if(ret == -1){
1733
perror("ioctl SIOCGIFFLAGS");
2124
perror_plus("ioctl SIOCGIFFLAGS");
1734
2125
} else if(network.ifr_flags & IFF_UP) {
1735
2126
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1736
2127
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1737
2128
if(ret == -1){
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2129
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1739
2130
}
1740
2131
}
1741
2132
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1742
2133
if(ret == -1){
1743
perror("close");
2134
perror_plus("close");
1744
2135
}
1745
2136
/* Lower privileges permanently */
1746
2137
errno = 0;
1747
2138
ret = setuid(uid);
1748
2139
if(ret == -1){
1749
perror("setuid");
2140
perror_plus("setuid");
1750
2141
}
1751
2142
}
1752
2143
}
1753
2144
1754
/* Removes the temp directory used by GPGME */
2145
/* Removes the GPGME temp directory and all files inside */
1755
2146
if(tempdir_created){
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
}
2147
struct dirent **direntries = NULL;
2148
struct dirent *direntry = NULL;
2149
int numentries = scandir(tempdir, &direntries, notdotentries,
2150
alphasort);
2151
if (numentries > 0){
2152
for(int i = 0; i < numentries; i++){
2153
direntry = direntries[i];
1776
2154
char *fullname = NULL;
1777
2155
ret = asprintf(&fullname, "%s/%s", tempdir,
1778
2156
direntry->d_name);
1779
2157
if(ret < 0){
1780
perror("asprintf");
2158
perror_plus("asprintf");
1781
2159
continue;
1782
2160
}
1783
2161
ret = remove(fullname);
1787
2165
}
1788
2166
free(fullname);
1789
2167
}
1790
closedir(d);
2168
}
2169
2170
/* need to clean even if 0 because man page doesn't specify */
2171
free(direntries);
2172
if (numentries == -1){
2173
perror_plus("scandir");
1791
2174
}
1792
2175
ret = rmdir(tempdir);
1793
2176
if(ret == -1 and errno != ENOENT){
1794
perror("rmdir");
2177
perror_plus("rmdir");
1795
2178
}
1796
2179
}
1797
2180
1802
2185
&old_sigterm_action,
1803
2186
NULL));
1804
2187
if(ret == -1){
1805
perror("sigaction");
2188
perror_plus("sigaction");
1806
2189
}
1807
2190
do {
1808
2191
ret = raise(signal_received);
1809
2192
} while(ret != 0 and errno == EINTR);
1810
2193
if(ret != 0){
1811
perror("raise");
2194
perror_plus("raise");
1812
2195
abort();
1813
2196
}
1814
2197
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0