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- Committer: Teddy Hogeborn
- Date: 2011-07-27 17:58:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20110727175827-nrd1ysjl4jrh6qw1
Tags: version-1.3.1-1
* Makefile (version): Changed to "1.3.1".
* NEWS (Version 1.3.1): New entry.
* debian/changelog (1.3.1-1): - '' -
* NEWS (Version 1.3.1): New entry.
* debian/changelog (1.3.1-1): - '' -
- files removed:
- debian/source/local-options
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
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() */
123
123
#define PATHDIR "/conf/conf.d/mandos"
124
124
#define SECKEY "seckey.txt"
125
125
#define PUBKEY "pubkey.txt"
126
#define HOOKDIR "/lib/mandos/network-hooks.d"
127
126
128
127
bool debug = false;
129
128
static const char mandos_protocol_version[] = "1";
130
129
const char *argp_program_version = "mandos-client " VERSION;
131
const char *argp_program_bug_address = "<mandos@recompile.se>";
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
132
131
static const char sys_class_net[] = "/sys/class/net";
133
132
char *connect_to = NULL;
134
133
188
187
return buffer_capacity;
189
188
}
190
189
191
/* Add server to set of servers to retry periodically */
192
190
int add_server(const char *ip, uint16_t port,
193
191
AvahiIfIndex if_index,
194
192
int af){
206
204
perror_plus("strdup");
207
205
return -1;
208
206
}
209
/* Special case of first server */
207
/* unique case of first server */
210
208
if (mc.current_server == NULL){
211
209
new_server->next = new_server;
212
210
new_server->prev = new_server;
213
211
mc.current_server = new_server;
214
/* Place the new server last in the list */
212
/* Placing the new server last in the list */
215
213
} else {
216
214
new_server->next = mc.current_server;
217
215
new_server->prev = mc.current_server->prev;
284
282
return false;
285
283
}
286
284
287
/* Set GPGME home directory for the OpenPGP engine only */
285
/* Set GPGME home directory for the OpenPGP engine only */
288
286
rc = gpgme_get_engine_info(&engine_info);
289
287
if(rc != GPG_ERR_NO_ERROR){
290
288
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
1086
1084
errno = old_errno;
1087
1085
}
1088
1086
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){
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){
1100
1143
if(debug){
1101
perror_plus("ioctl SIOCGIFFLAGS");
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1102
1146
}
1103
return false;
1147
free(flagstring);
1148
return 0;
1104
1149
}
1105
return true;
1106
}
1107
1108
bool good_flags(const char *ifname, const struct ifreq *ifr){
1109
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1110
1152
/* Reject the loopback device */
1111
if(ifr->ifr_flags & IFF_LOOPBACK){
1153
if(flags & IFF_LOOPBACK){
1112
1154
if(debug){
1113
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1156
if_entry->d_name);
1115
1157
}
1116
return false;
1158
return 0;
1117
1159
}
1118
1160
/* Accept point-to-point devices only if connect_to is specified */
1119
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1120
1162
if(debug){
1121
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1164
if_entry->d_name);
1123
1165
}
1124
return true;
1166
return 1;
1125
1167
}
1126
1168
/* Otherwise, reject non-broadcast-capable devices */
1127
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1169
if(not (flags & IFF_BROADCAST)){
1128
1170
if(debug){
1129
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1172
if_entry->d_name);
1131
1173
}
1132
return false;
1174
return 0;
1133
1175
}
1134
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
if(ifr->ifr_flags & IFF_NOARP){
1177
if(flags & IFF_NOARP){
1136
1178
if(debug){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1138
1181
}
1139
return false;
1182
return 0;
1140
1183
}
1141
1142
1184
/* Accept this device */
1143
1185
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;
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1213
1188
}
1214
1189
return 1;
1215
1190
}
1225
1200
return 1;
1226
1201
}
1227
1202
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
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1273
1204
int ret;
1274
1205
struct timespec now;
1275
1206
struct timespec waited_time;
1276
1207
intmax_t block_time;
1277
1208
1278
1209
while(true){
1279
1210
if(mc.current_server == NULL){
1280
1211
if (debug){
1305
1236
block_time = ((retry_interval
1306
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1307
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1308
1239
1309
1240
if (debug){
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1311
1242
}
1312
1243
1313
1244
if(block_time <= 0){
1314
1245
ret = start_mandos_communication(mc.current_server->ip,
1315
1246
mc.current_server->port,
1480
1411
errno = 0;
1481
1412
retry_interval = strtod(arg, &tmp);
1482
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1483
or (retry_interval * 1000) > INT_MAX
1484
or retry_interval < 0){
1414
or (retry_interval * 1000) > INT_MAX){
1485
1415
argp_error(state, "Bad retry interval");
1486
1416
}
1487
1417
break;
1538
1468
perror_plus("seteuid");
1539
1469
}
1540
1470
1541
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1542
int seckey_fd = open(seckey, O_RDONLY);
1543
if(seckey_fd == -1){
1544
perror_plus("open");
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");
1545
1478
} 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
}
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");
1555
1483
}
1556
1484
}
1557
TEMP_FAILURE_RETRY(close(seckey_fd));
1558
1485
}
1486
TEMP_FAILURE_RETRY(close(seckey_fd));
1559
1487
}
1560
1488
1561
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1562
int pubkey_fd = open(pubkey, O_RDONLY);
1563
if(pubkey_fd == -1){
1564
perror_plus("open");
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");
1565
1496
} 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
}
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");
1575
1501
}
1576
1502
}
1577
TEMP_FAILURE_RETRY(close(pubkey_fd));
1578
1503
}
1504
TEMP_FAILURE_RETRY(close(pubkey_fd));
1579
1505
}
1580
1506
1581
1507
/* Lower privileges */
1586
1512
}
1587
1513
}
1588
1514
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
}
1649
1650
1515
if(not debug){
1651
1516
avahi_set_log_function(empty_log);
1652
1517
}
1653
1518
1654
1519
if(interface[0] == '\0'){
1655
1520
struct dirent **direntries;
1656
/* First look for interfaces that are up */
1657
ret = scandir(sys_class_net, &direntries, up_interface,
1521
ret = scandir(sys_class_net, &direntries, good_interface,
1658
1522
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
}
1665
1523
if(ret >= 1){
1666
/* Pick the first interface returned */
1524
/* Pick the first good interface */
1667
1525
interface = strdup(direntries[0]->d_name);
1668
1526
if(debug){
1669
1527
fprintf(stderr, "Using interface \"%s\"\n", interface);
1971
1829
1972
1830
port = (uint16_t)tmpmax;
1973
1831
*address = '\0';
1832
address = connect_to;
1974
1833
/* Colon in address indicates IPv6 */
1975
1834
int af;
1976
if(strchr(connect_to, ':') != NULL){
1835
if(strchr(address, ':') != NULL){
1977
1836
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
}
1984
1837
} else {
1985
1838
af = AF_INET;
1986
1839
}
1987
address = connect_to;
1988
1840
1989
1841
if(quit_now){
1990
1842
goto end;
1991
1843
}
1992
1844
1993
1845
while(not quit_now){
1994
1846
ret = start_mandos_communication(address, port, if_index, af);
1995
1847
if(quit_now or ret == 0){
1996
1848
break;
1997
1849
}
1998
if(debug){
1999
fprintf(stderr, "Retrying in %d seconds\n",
2000
(int)retry_interval);
2001
}
2002
sleep((int)retry_interval);
2003
}
2004
1850
sleep((int)retry_interval or 1);
1851
};
1852
2005
1853
if (not quit_now){
2006
1854
exitcode = EXIT_SUCCESS;
2007
1855
}
2008
1856
2009
1857
goto end;
2010
1858
}
2011
1859
2108
1956
}
2109
1957
}
2110
1958
2111
/* XXX run network hooks "stop" here */
2112
2113
1959
/* Take down the network interface */
2114
1960
if(take_down_interface){
2115
1961
/* Re-raise priviliges */
2146
1992
if(tempdir_created){
2147
1993
struct dirent **direntries = NULL;
2148
1994
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++){
1995
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1996
if (ret > 0){
1997
for(int i = 0; i < ret; i++){
2153
1998
direntry = direntries[i];
2154
1999
char *fullname = NULL;
2155
2000
ret = asprintf(&fullname, "%s/%s", tempdir,
2167
2012
}
2168
2013
}
2169
2014
2170
/* need to clean even if 0 because man page doesn't specify */
2015
/* need to be cleaned even if ret == 0 because man page doesn't
2016
specify */
2171
2017
free(direntries);
2172
if (numentries == -1){
2018
if (ret == -1){
2173
2019
perror_plus("scandir");
2174
2020
}
2175
2021
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0