9
9
* "browse_callback", and parts of "main".
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
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
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 */
1020
1025
errno = old_errno;
1029
* This function determines if a directory entry in /sys/class/net
1030
* corresponds to an acceptable network device.
1031
* (This function is passed to scandir(3) as a filter function.)
1033
int good_interface(const struct dirent *if_entry){
1035
char *flagname = NULL;
1036
if(if_entry->d_name[0] == '.'){
1039
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1045
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1052
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1053
/* read line from flags_fd */
1054
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1055
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1056
flagstring[(size_t)to_read] = '\0';
1057
if(flagstring == NULL){
1063
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1080
tmpmax = strtoimax(flagstring, &tmp, 0);
1081
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1082
and not (isspace(*tmp)))
1083
or tmpmax != (ifreq_flags)tmpmax){
1085
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1086
flagstring, if_entry->d_name);
1092
ifreq_flags flags = (ifreq_flags)tmpmax;
1093
/* Reject the loopback device */
1094
if(flags & IFF_LOOPBACK){
1096
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1101
/* Accept point-to-point devices only if connect_to is specified */
1102
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1104
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1109
/* Otherwise, reject non-broadcast-capable devices */
1110
if(not (flags & IFF_BROADCAST)){
1112
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1117
/* Reject non-ARP interfaces (including dummy interfaces) */
1118
if(flags & IFF_NOARP){
1120
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1125
/* Accept this device */
1127
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1133
int notdotentries(const struct dirent *direntry){
1134
/* Skip "." and ".." */
1135
if(direntry->d_name[0] == '.'
1136
and (direntry->d_name[1] == '\0'
1137
or (direntry->d_name[1] == '.'
1138
and direntry->d_name[2] == '\0'))){
1023
1144
int main(int argc, char *argv[]){
1024
1145
AvahiSServiceBrowser *sb = NULL;
1027
1148
intmax_t tmpmax;
1029
1150
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1151
const char *interface = "";
1031
1152
struct ifreq network;
1033
1154
bool take_down_interface = false;
1036
char *connect_to = NULL;
1037
1157
char tempdir[] = "/tmp/mandosXXXXXX";
1038
1158
bool tempdir_created = false;
1039
1159
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1197
1317
avahi_set_log_function(empty_log);
1320
if(interface[0] == '\0'){
1321
struct dirent **direntries;
1322
ret = scandir(sys_class_net, &direntries, good_interface,
1325
/* Pick the first good interface */
1326
interface = strdup(direntries[0]->d_name);
1328
fprintf(stderr, "Using interface \"%s\"\n", interface);
1330
if(interface == NULL){
1333
exitcode = EXIT_FAILURE;
1339
fprintf(stderr, "Could not find a network interface\n");
1340
exitcode = EXIT_FAILURE;
1200
1345
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
1346
from the signal handler */
1274
1419
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
1420
if(strcmp(interface, "none") != 0){
1276
1421
if_index = (AvahiIfIndex) if_nametoindex(interface);
1277
1422
if(if_index == 0){
1278
1423
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1643
/* Removes the temp directory used by GPGME */
1775
/* Removes the GPGME temp directory and all files inside */
1644
1776
if(tempdir_created){
1646
struct dirent *direntry;
1647
d = opendir(tempdir);
1649
if(errno != ENOENT){
1654
direntry = readdir(d);
1655
if(direntry == NULL){
1658
/* Skip "." and ".." */
1659
if(direntry->d_name[0] == '.'
1660
and (direntry->d_name[1] == '\0'
1661
or (direntry->d_name[1] == '.'
1662
and direntry->d_name[2] == '\0'))){
1777
struct dirent **direntries = NULL;
1778
struct dirent *direntry = NULL;
1779
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1781
for(int i = 0; i < ret; i++){
1782
direntry = direntries[i];
1665
1783
char *fullname = NULL;
1666
1784
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
1785
direntry->d_name);