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- Committer: Teddy Hogeborn
- Date: 2011-02-27 17:14:48 UTC
- mfrom: (463.1.10 mandos-python26)
- Revision ID: teddy@fukt.bsnet.se-20110227171448-cz13rrjix02t4l8b
Merge from Python 2.6 branch.
- files added:
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 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
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
66
#include <time.h> /* nanosleep(), time(), sleep() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
127
127
static const char mandos_protocol_version[] = "1";
128
128
const char *argp_program_version = "mandos-client " VERSION;
129
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
130
static const char sys_class_net[] = "/sys/class/net";
131
char *connect_to = NULL;
130
132
131
133
/* Used for passing in values through the Avahi callback functions */
132
134
typedef struct {
688
690
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
689
691
}
690
692
if(ret < 0){
691
int e = errno;
692
perror("connect");
693
errno = e;
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
int e = errno;
695
perror("connect");
696
errno = e;
697
}
694
698
goto mandos_end;
695
699
}
696
700
1020
1024
errno = old_errno;
1021
1025
}
1022
1026
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){
1081
if(debug){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1084
}
1085
free(flagstring);
1086
return 0;
1087
}
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1090
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1092
if(debug){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1095
}
1096
return 0;
1097
}
1098
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1100
if(debug){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1103
}
1104
return 1;
1105
}
1106
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1108
if(debug){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
1114
/* Accept this device */
1115
if(debug){
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
1120
}
1121
1023
1122
int main(int argc, char *argv[]){
1024
1123
AvahiSServiceBrowser *sb = NULL;
1025
1124
int error;
1027
1126
intmax_t tmpmax;
1028
1127
char *tmp;
1029
1128
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1129
const char *interface = "";
1031
1130
struct ifreq network;
1032
1131
int sd = -1;
1033
1132
bool take_down_interface = false;
1034
1133
uid_t uid;
1035
1134
gid_t gid;
1036
char *connect_to = NULL;
1037
1135
char tempdir[] = "/tmp/mandosXXXXXX";
1038
1136
bool tempdir_created = false;
1039
1137
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1196
1294
if(not debug){
1197
1295
avahi_set_log_function(empty_log);
1198
1296
}
1297
1298
if(interface[0] == '\0'){
1299
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1301
alphasort);
1302
if(ret >= 1){
1303
/* Pick the first good interface */
1304
interface = strdup(direntries[0]->d_name);
1305
if(debug){
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1307
}
1308
if(interface == NULL){
1309
perror("malloc");
1310
free(direntries);
1311
exitcode = EXIT_FAILURE;
1312
goto end;
1313
}
1314
free(direntries);
1315
} else {
1316
free(direntries);
1317
fprintf(stderr, "Could not find a network interface\n");
1318
exitcode = EXIT_FAILURE;
1319
goto end;
1320
}
1321
}
1199
1322
1200
1323
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
1324
from the signal handler */
1272
1395
}
1273
1396
1274
1397
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
1398
if(strcmp(interface, "none") != 0){
1276
1399
if_index = (AvahiIfIndex) if_nametoindex(interface);
1277
1400
if(if_index == 0){
1278
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1349
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1350
1473
if(ret == -1){
1351
1474
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1353
1476
exitcode = EX_OSERR;
1354
1477
#ifdef __linux__
1355
1478
if(restore_loglevel){
1497
1620
if(quit_now){
1498
1621
goto end;
1499
1622
}
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;
1623
1624
while(not quit_now){
1625
ret = start_mandos_communication(address, port, if_index, af);
1626
if(quit_now or ret == 0){
1520
1627
break;
1521
1628
}
1522
} else {
1629
sleep(15);
1630
};
1631
1632
if (not quit_now){
1523
1633
exitcode = EXIT_SUCCESS;
1524
1634
}
1635
1525
1636
goto end;
1526
1637
}
1527
1638
1624
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1625
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1626
1737
if(ret == -1){
1627
perror("ioctl SIOCSIFFLAGS");
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1628
1739
}
1629
1740
}
1630
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
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Version: 2.0.2.dev0