int
nr_turn_client_rewrite_indication_data(UCHAR *msg, size_t len, size_t *newlen, nr_transport_addr *remote_addr)
{
int _status;
#if 0
int r,_status;
nr_stun_message ind;
if ((r=nr_stun_parse_message((char*)msg, len, &ind)))
ABORT(r);
if (ind.msgHdr.msgType != DataIndicationMsg)
ABORT(R_BAD_ARGS);
if (ind.hasRemoteAddress) {
if ((r=nr_transport_addr_copy(remote_addr, &ind.remoteAddress)))
ABORT(r);
}
else {
ABORT(R_BAD_ARGS);
}
if (ind.hasData) {
assert(ind.data.length < len);
memmove(msg, ind.data.data, ind.data.length);
msg[ind.data.length] = '\0';
*newlen = ind.data.length;
}
else {
*newlen = 0;
}
#else
//TODO: what will this be turned into in the latest version of the spec???
ABORT(R_FAILED);
#endif
_status=0;
abort:
return(_status);
}
static void s_cb(int s, int how, void *cb_arg)
{
#if 0
nr_socket *sock = (nr_socket*)cb_arg;
UCHAR buf2[4096];
size_t len;
nr_transport_addr addr2;
int r;
StunMessage req;
StunMessage res;
//StunAddress4 from;
fprintf(stderr,"TURN_SERVER_UTIL: SERVER CB\n");
if(r=nr_socket_recvfrom(sock,buf2,sizeof(buf2),&len,0,&addr2)){
fprintf(stderr,"Error in recvfrom\n");
exit(1);
}
memset(&req, 0, sizeof(req));
memset(&res, 0, sizeof(res));
//memset(&from, 0, sizeof(from));
//from.addr = ntohl(addr2.u.addr4.sin_addr.s_addr);
//from.port = ntohs(addr2.u.addr4.sin_port);
if ((r=nr_stun_parse_message((char*)buf2, len, &req))) {
fprintf(stderr,"Error in nr_stun_parse_message\n");
exit(1);
}
if ((r=nr_stun_process_request(&req, buf2, len, &addr2, 0, 0, &res))) {
/* failure is expected because the server code doesn't support TURN */
if (r!=R_FAILED) {
fprintf(stderr,"Failed to process message!\n");
exit(1);
}
fprintf(stderr,"TURN_SERVER_UTIL: No problem with parse failure ... process TURN in test server code\n");
}
if (!nr_is_stun_message((char*)buf2, len)) {
fprintf(stderr,"TURN_SERVER_UTIL: not a STUN/TURN message\n");
/* instead of sending to remoteAddress, just echo the content back
* for the purposes of our tests */
goto send;
}
res.hasFingerprint = 1;
switch (req.msgHdr.msgType) {
case AllocateRequestMsg:
if (! req.hasNonce) {
fprintf(stderr, "Received AllocateRequestMsg #1\n");
assert(!req.hasMessageIntegrity);
/* TODO: what about username: does it go into the req or not? spec not clear */
res.msgHdr.msgType = AllocateErrorResponseMsg;
res.hasUsername = 0;
res.hasNonce = 1;
strcpy(res.nonce, nonce);
res.hasRealm = 1;
strcpy(res.realm, "REALM");
res.hasErrorCode = 1;
res.errorCode.errorClass = 4;
res.errorCode.number = 35;
}
else {
fprintf(stderr, "Received AllocateRequestMsg #2\n");
assert(req.hasUsername);
assert(req.hasRealm);
assert(req.hasNonce);
assert(req.hasMessageIntegrity);
res.msgHdr.msgType = AllocateResponseMsg;
res.hasUsername = 1;
res.hasMessageIntegrity = 1;
strcpy(res.username, req.username);
#if 0
//TODO: this is totally broken, but TURN is changing and so
//TODO: we'll need to take another pass at all this code
//TODO: anyhow, so leave it broken for now
res.hasRelayAddress = 1;
res.relayAddress.family = IPv4Family;
res.relayAddress.ipv4.addr = from.addr;
res.relayAddress.ipv4.port = from.port;
res.hasXorMappedAddress = 1;
res.xorMappedAddress.family = IPv4Family;
res.xorMappedAddress.ipv4.addr = from.addr;
res.xorMappedAddress.ipv4.port = from.port;
#endif
}
break;
case SendIndicationMsg:
fprintf(stderr, "Received SendIndicationMsg\n");
assert(req.hasRemoteAddress);
/* pretend to send empty UDP packet to remoteAddress per the
* TURN spec and to wait for a DataIndication resonse */
fprintf(stderr, "Sending UDP packet to REMOTE-ADDRESS...\n");
fprintf(stderr, "Waiting for response from REMOTE-ADDRESS...\n");
/* ok, this is an indication, so formally there is no "response",
* but we're going to send a data indication to it, so just pretend
* that it's a formal response */
res.msgHdr.msgType = DataIndicationMsg;
res.hasRemoteAddress = 1;
nr_transport_addr_copy(&res.remoteAddress, &req.remoteAddress);
break;
case SetActiveDestRequestMsg:
fprintf(stderr, "Received SetActiveDestRequestMsg\n");
assert(req.hasRemoteAddress);
res.msgHdr.msgType = SetActiveDestResponseMsg;
break;
default:
assert(0);
break;
}
memset(&buf2, 0, sizeof(buf2));
if ((r=nr_stun_encode_message(STUN_MODE_STUN, &res, (char*)buf2, STUN_MAX_MESSAGE_SIZE, &pass, (unsigned int*)&len))) {
fprintf(stderr,"Error encoding TURN response\n");
exit(1);
}
send:
fprintf(stderr,"Sending response to %s\n", addr2.as_string);
if(r=nr_socket_sendto(sock,buf2,len,0,&addr2)) {
fprintf(stderr,"Error sending TURN response\n");
exit(1);
}
NR_ASYNC_WAIT(s, how, s_cb, cb_arg);
#else
UNIMPLEMENTED;
#endif
}
