26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
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
128
bool debug = false;
128
129
static const char mandos_protocol_version[] = "1";
129
130
const char *argp_program_version = "mandos-client " VERSION;
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
131
const char *argp_program_bug_address = "<mandos@recompile.se>";
131
132
static const char sys_class_net[] = "/sys/class/net";
132
133
char *connect_to = NULL;
170
171
perror(print_text);
174
int fprintf_plus(FILE *stream, const char *format, ...){
176
va_start (ap, format);
178
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));
179
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
174
183
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
184
* bytes. "buffer_capacity" is how much is currently allocated,
1085
1094
errno = old_errno;
1097
bool get_flags(const char *ifname, struct ifreq *ifr){
1100
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1102
perror_plus("socket");
1105
strcpy(ifr->ifr_name, ifname);
1106
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1109
perror_plus("ioctl SIOCGIFFLAGS");
1116
bool good_flags(const char *ifname, const struct ifreq *ifr){
1118
/* Reject the loopback device */
1119
if(ifr->ifr_flags & IFF_LOOPBACK){
1121
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1126
/* Accept point-to-point devices only if connect_to is specified */
1127
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1129
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1134
/* Otherwise, reject non-broadcast-capable devices */
1135
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1137
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1142
/* Reject non-ARP interfaces (including dummy interfaces) */
1143
if(ifr->ifr_flags & IFF_NOARP){
1145
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1150
/* Accept this device */
1152
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1089
1158
* This function determines if a directory entry in /sys/class/net
1090
1159
* corresponds to an acceptable network device.
1091
1160
* (This function is passed to scandir(3) as a filter function.)
1093
1162
int good_interface(const struct dirent *if_entry){
1164
if(if_entry->d_name[0] == '.'){
1169
if(not get_flags(if_entry->d_name, &ifr)){
1173
if(not good_flags(if_entry->d_name, &ifr)){
1180
* This function determines if a directory entry in /sys/class/net
1181
* corresponds to an acceptable network device which is up.
1182
* (This function is passed to scandir(3) as a filter function.)
1184
int up_interface(const struct dirent *if_entry){
1095
1186
char *flagname = NULL;
1096
1187
if(if_entry->d_name[0] == '.'){
1301
/* Is this directory entry a runnable program? */
1302
int runnable_hook(const struct dirent *direntry){
1306
if((direntry->d_name)[0] == '\0'){
1311
/* Save pointer to last character */
1312
char *end = strchr(direntry->d_name, '\0')-1;
1319
if(((direntry->d_name)[0] == '#')
1321
/* Temporary #name# */
1325
/* XXX more rules here */
1327
ret = stat(direntry->d_name, &st);
1330
perror_plus("Could not stat plugin");
1334
if(not (st.st_mode & S_ISREG)){
1335
/* Not a regular file */
1338
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1339
/* Not executable */
1204
1345
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1206
1347
struct timespec now;
1662
/* Find network hooks and run them */
1664
struct dirent **direntries;
1665
struct dirent *direntry;
1666
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1668
int devnull = open("/dev/null", O_RDONLY);
1669
for(int i = 0; i < numhooks; i++){
1670
direntry = direntries[0];
1671
char *fullname = NULL;
1672
ret = asprintf(&fullname, "%s/%s", tempdir,
1675
perror_plus("asprintf");
1678
pid_t hook_pid = fork();
1681
dup2(devnull, STDIN_FILENO);
1683
dup2(STDERR_FILENO, STDOUT_FILENO);
1684
setenv("DEVICE", interface, 1);
1685
setenv("VERBOSE", debug ? "1" : "0", 1);
1686
setenv("MODE", "start", 1);
1687
/* setenv( XXX more here */
1688
ret = execl(fullname, direntry->d_name, "start");
1689
perror_plus("execl");
1522
1700
avahi_set_log_function(empty_log);
1525
1703
if(interface[0] == '\0'){
1526
1704
struct dirent **direntries;
1527
1705
ret = scandir(sys_class_net, &direntries, good_interface,