void actionInit(Json::Value &data,
std::shared_ptr<typename WsServer::Connection> &connection,
WsPacket<WsServer> &) {
// LOG(INFO) << "running actionInit JSON";
IfAddrs ifAddrs;
if (!IfAddrs::fromJson(data, ifAddrs)) {
LOG(ERROR) << "can't parse ifAddrs";
return;
}
// LOG(INFO) << ifAddrs.asCommands(std::string());
std::shared_ptr<TunDevice> tun(
new TunDevice(ifAddrs, tunaTor.getMtu(), tunaTor.getQsize()));
if (!tun->start()) {
LOG(ERROR) << "can't start tun device";
sendTun("init-res", tun, connection);
return;
}
if (!startStatThread(tun, connection)) {
tun->stop();
sendTun("init-res", tun, connection);
return;
}
if (!startRecvThread(tun, connection)) {
tun->stop();
sendTun("init-res", tun, connection);
return;
}
tunDevices.insert(std::make_pair(connection, tun));
// Create TunDevice
sendTun("init-res", tun, connection);
}
uint ip6_tunnels::get(const ip::address_v6& remote)
{
map::iterator i = _tunnels.find(remote);
if (i != _tunnels.end()) {
if (++i->second->refcount == 1)
_gc.erase(remote);
return i->second->tunnel.get_device_id();
}
std::auto_ptr<entry> tun(new entry(_io_service));
std::pair<map::iterator, bool> res = _tunnels.insert(remote, tun);
try {
res.first->second->tunnel.open("", _local.scope_id(), _local, remote);
res.first->second->tunnel.set_enable(true);
if (_global_address == true)
res.first->second->tunnel.add_address(_local, 64); // TODO make this prefix configurable
else {}
} catch (...) {
_tunnels.erase(res.first);
throw;
}
return res.first->second->tunnel.get_device_id();
}
void tun_serv(struct arguments *args) {
int fd_udp = 0, fd_tun = 0;
/* init server state */
struct tun_state *state = init_tun_state(args);
/* create tun if and sockets */
tun(state, &fd_tun);
fd_udp = udp_sock(state->public_port, 1, state->public_addr);
/* run capture threads */
xthread_create(capture_notun, (void *) state, 1);
if (!args->capture_notun_only)
xthread_create(capture_tun, (void *) state, 1);
synchronize();
/* run server */
debug_print("running serv ...\n");
xthread_create(serv_thread, (void*) state, 1);
/* init select loop */
fd_set input_set;
struct timeval tv;
int sel = 0, fd_max = 0;
char buf[BUFF_SIZE], *buffer;
buffer = buf;
if (state->planetlab) {
buffer[0]=0;buffer[1]=0;
buffer[2]=8;buffer[3]=0;
buffer+=4;
}
fd_max=max(fd_tun,fd_udp);
loop=1;
signal(SIGINT, serv_shutdown);
signal(SIGTERM, serv_shutdown);
while (loop) {
FD_ZERO(&input_set);
FD_SET(fd_udp, &input_set);
FD_SET(fd_tun, &input_set);
sel = xselect(&input_set, fd_max, &tv, state->inactivity_timeout);
if (sel == 0) {
debug_print("timeout\n");
break;
} else if (sel > 0) {
if (FD_ISSET(fd_udp, &input_set))
tun_serv_out(fd_udp, fd_tun, state, buffer);
if (FD_ISSET(fd_tun, &input_set))
tun_serv_in(fd_udp, fd_tun, state, buffer);
}
}
}
int
main (int argc, char **argv)
{
int utunfd = tun ();
if (utunfd == -1)
{
fprintf(stderr,"Unable to establish UTUN descriptor - aborting\n");
exit(1);
}
fprintf(stderr,"Utun interface is up.. Configure IPv4 using \"ifconfig utun1 _ipA_ _ipB_\"\n");
fprintf(stderr," Configure IPv6 using \"ifconfig utun1 inet6 _ip6_\"\n");
fprintf(stderr,"Then (e.g.) ping _ipB_ (IPv6 will automatically generate ND messages)\n");
// PoC - Just dump the packets...
for (;;)
{
unsigned char c[1500];
int len;
int i;
len = read (utunfd,c, 1500);
// First 4 bytes of read data are the AF: 2 for AF_INET, 1E for AF_INET6, etc..
for (i = 4; i< len; i++)
{
printf ("%02x ", c[i]);
if ( (i-4)%16 ==15) printf("\n");
}
printf ("\n");
}
return(0);
}
int main(int argc, char *argv[])
{
int header = 4;
int mtu = 1500;
int debug = 0;
char *hostname;
char *path;
int port;
int noDelayFlag = 0;
int tid;
int ch;
int utunfd;
int remoteFd;
pid_t pid;
while ((ch = getopt(argc, argv, "h:m:np:t:u:v")) != -1)
switch (ch)
{
case 'h':
hostname = optarg;
break;
case 'm':
mtu = atoi(optarg) + header;
break;
case 'n':
noDelayFlag = 1;
break;
case 'p':
port = atoi(optarg);
break;
case 't':
tid = atoi(optarg) + 1;
break;
case 'u':
path = optarg;
break;
case 'v':
debug++;
break;
default:
usage(argv[0]);
}
int max = mtu + header;
utunfd = tun(tid);
if (port > 0)
{
remoteFd = tcp(hostname, port, noDelayFlag);
}
else
{
remoteFd = unix(path);
}
fd_set readset;
int maxfd = remoteFd;
if (maxfd < utunfd)
maxfd = utunfd;
if (utunfd == -1 || remoteFd == -1)
{
fprintf(stderr, "Unable to establish UTUN/IPC descriptors - aborting\n");
exit(1);
}
unsigned char fromRemote[max];
unsigned char fromTun[max];
int len;
int expected = 0;
int totalLen = 0;
int remaining = 0;
for (;;)
{
FD_ZERO(&readset);
FD_SET(utunfd, &readset);
FD_SET(remoteFd, &readset);
select(maxfd + 1, &readset, NULL, NULL, NULL);
if (FD_ISSET(utunfd, &readset))
{
len = read(utunfd, fromTun, max);
if (len > 0)
{
if (debug)
{
printSome(fromTun, len, ">>");
}
//set frame
fromTun[0] = 0;
fromTun[1] = 0;
fromTun[2] = 8;
fromTun[3] = 0;
write(remoteFd, fromTun, len);
}
else if (len == 0)
{
break;
}
}
if (FD_ISSET(remoteFd, &readset))
{
//we always have remaining, set to header length
if (!expected && !remaining && !totalLen)
{
//frame + packet header
remaining = 8;
}
len = read(remoteFd, &fromRemote[totalLen], remaining);
remaining = remaining - len;
totalLen += len;
//got it all, but just the header, parse expected
if (!expected && !remaining)
{
remaining = expected = (fromRemote[6] << 8) | (fromRemote[7] & 0xff);
remaining = remaining - header;
if (debug)
{
fprintf(stderr,
"Finished reading header totalLen %i pExpected %i remaining %i\n",
totalLen, expected, remaining);
printSome(fromRemote, totalLen, "<<");
}
}
//really got it all, ship it
else if (expected && !remaining)
{
if (debug)
{
fprintf(stderr,
"Finished reading packet totalLen %i pExpected %i remaining %i\n",
totalLen, expected, remaining);
printSome(fromRemote, totalLen, "<<");
}
//set frame
fromRemote[0] = 0;
fromRemote[1] = 0;
fromRemote[2] = 0;
fromRemote[3] = 2;
write(utunfd, fromRemote, totalLen);
//we just completed a packet, so reset
expected = totalLen = remaining = 0;
}
else if (len == 0)
{
break;
}
else if (debug)
{
fprintf(stderr,
"Keep reading packet totalLen %i pExpected %i remaining %i\n",
totalLen, expected, remaining);
}
}
}
close(utunfd);
close(remoteFd);
return (0);
}