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Neighbor.cxx
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Neighbor.cxx
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//////////////////////////////////////////////////////////////////
//
// Neighboring System for GNU Gatekeeper
//
// Copyright (c) Citron Network Inc. 2002-2003
// Copyright (c) 2004-2022, Jan Willamowius
//
// This work is published under the GNU Public License version 2 (GPLv2)
// see file COPYING for details.
// We also explicitly grant the right to link this code
// with the OpenH323/H323Plus and OpenSSL library.
//
//////////////////////////////////////////////////////////////////
#include "config.h"
#include <ptlib.h>
#include <ptclib/pdns.h>
#include <ptclib/enum.h>
#include <h323pdu.h>
#include <ptclib/cypher.h>
#include "gk_const.h"
#include "stl_supp.h"
#include "GkClient.h"
#include "RasPDU.h"
#include "RasSrv.h"
#include "RasTbl.h"
#include "sigmsg.h"
#include "cisco.h"
#include "h323util.h"
#include "Neighbor.h"
#ifdef HAS_H460
#include <h460/h4601.h>
#endif
#ifdef P_SSL
#include <openssl/rand.h>
#endif // P_SSL
using std::multimap;
using std::make_pair;
using std::find_if;
using std::bind2nd;
using std::equal_to;
using std::mem_fun;
using Routing::Route;
namespace Neighbors {
const char *NeighborSection = "RasSrv::Neighbors";
const char *LRQFeaturesSection = "RasSrv::LRQFeatures";
const char *RoutedSec = "RoutedMode";
static const char OID_MD5[] = "1.2.840.113549.2.5";
void SetCryptoGkTokens(H225_ArrayOf_CryptoH323Token & cryptoTokens, const PString & id, const PString & password)
{
cryptoTokens.SetSize(0);
H235AuthSimpleMD5 auth;
// avoid copying for thread-safety
auth.SetLocalId((const char *)id);
auth.SetPassword((const char *)password);
H225_ArrayOf_ClearToken dumbTokens;
H225_ArrayOf_CryptoH323Token newCryptoTokens;
auth.PrepareTokens(dumbTokens, newCryptoTokens);
H225_CryptoH323Token_cryptoEPPwdHash & cryptoEPPwdHash = newCryptoTokens[0];
// Create the H.225 GK crypto token with the hash calculated for the EP token
H225_CryptoH323Token * finalCryptoToken = new H225_CryptoH323Token;
finalCryptoToken->SetTag(H225_CryptoH323Token::e_cryptoGKPwdHash);
H225_CryptoH323Token_cryptoGKPwdHash & cryptoGKPwdHash = *finalCryptoToken;
// Set the token data that actually goes over the wire
cryptoGKPwdHash.m_gatekeeperId = id;
cryptoGKPwdHash.m_timeStamp = cryptoEPPwdHash.m_timeStamp;
cryptoGKPwdHash.m_token.m_algorithmOID = OID_MD5;
cryptoGKPwdHash.m_token.m_hash = cryptoEPPwdHash.m_token.m_hash;
cryptoTokens.Append(finalCryptoToken);
}
class OldGK : public Neighbor {
// override from class Neighbor
virtual bool SetProfile(const PString &, const PString &);
};
class GnuGK : public Neighbor {
// override from class Neighbor
virtual bool OnSendingLRQ(H225_LocationRequest &, const AdmissionRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const SetupRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const FacilityRequest &);
virtual bool IsAcceptable(RasMsg *ras) const;
};
class CiscoGK : public Neighbor {
public:
// override from class Neighbor
virtual bool OnSendingLRQ(H225_LocationRequest &, const AdmissionRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const LocationRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const SetupRequest &);
virtual bool CheckReply(RasMsg *msg) const;
};
// stupid Clarent gatekeeper
class ClarentGK : public Neighbor {
// override from class Neighbor
virtual bool OnSendingLRQ(H225_LocationRequest &);
};
// a gatekeeper from a Korean vendor
class GlonetGK : public Neighbor {
// override from class Neighbor
virtual bool OnSendingLRQ(H225_LocationRequest &, const AdmissionRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const LocationRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const SetupRequest &);
virtual bool OnSendingLRQ(H225_LocationRequest &, const FacilityRequest &);
bool BuildLRQ(H225_LocationRequest &, WORD);
};
namespace { // anonymous namespace
SimpleCreator<OldGK> OldGKCreator("OldGK");
SimpleCreator<GnuGK> GnuGKCreator("GnuGK");
SimpleCreator<CiscoGK> CiscoGKCreator("CiscoGK");
SimpleCreator<ClarentGK> ClarentGKCreator("ClarentGK");
SimpleCreator<GlonetGK> GlonetGKCreator("GlonetGK");
int challenge;
const char * const OID_T = "0.0.8.235.0.2.5";
}
// if we put nomatch into anonymous namespace,
// stupid VC can't find it, why??
static const PrefixInfo nomatch(-1, 0);
// template class LRQSender
typedef Functor2<PrefixInfo, Neighbor *, WORD> LRQFunctor;
template<class R>
class LRQSender : public LRQFunctor {
public:
LRQSender(const R & r) : m_r(r) { }
virtual PrefixInfo operator()(Neighbor *, WORD seqnum) const;
private:
const R & m_r;
};
template<class R>
PrefixInfo LRQSender<R>::operator()(Neighbor *nb, WORD seqnum) const
{
// select neighbor based on dialed alias
if (const H225_ArrayOf_AliasAddress *dest = m_r.GetAliases()) {
H225_ArrayOf_AliasAddress aliases;
if (PrefixInfo info = nb->GetPrefixInfo(*dest, aliases)) {
H225_RasMessage lrq_ras;
H225_LocationRequest & lrq = nb->BuildLRQ(lrq_ras, seqnum, aliases);
if (nb->OnSendingLRQ(lrq, m_r) && nb->SendLRQ(lrq_ras))
return info;
}
}
// select neighbor based on dialed IP
if (const H225_TransportAddress *dest = m_r.GetDestIP()) {
H225_ArrayOf_AliasAddress aliases;
if (nb->GetIPInfo(*dest, aliases)) {
H225_RasMessage lrq_ras;
H225_LocationRequest & lrq = nb->BuildLRQ(lrq_ras, seqnum, aliases);
if (nb->OnSendingLRQ(lrq, m_r) && nb->SendLRQ(lrq_ras))
return PrefixInfo(100, 1);
}
}
return nomatch;
}
class LRQForwarder : public LRQFunctor {
public:
LRQForwarder(const LocationRequest & l) : m_lrq(l) { }
virtual PrefixInfo operator()(Neighbor *, WORD) const;
private:
const LocationRequest & m_lrq;
};
PrefixInfo LRQForwarder::operator()(Neighbor *nb, WORD /*seqnum*/) const
{
H225_ArrayOf_AliasAddress aliases;
if (PrefixInfo info = nb->GetPrefixInfo(m_lrq.GetRequest().m_destinationInfo, aliases)) {
H225_RasMessage lrq_ras;
lrq_ras.SetTag(H225_RasMessage::e_locationRequest);
H225_LocationRequest & lrq = lrq_ras;
// copy and forward
lrq = m_lrq.GetRequest();
lrq.m_destinationInfo = aliases;
// do the GW OUT rewrites
PString neighbor_id = nb->GetId();
PString neighbor_gkid = nb->GetGkId();
if (!neighbor_id.IsEmpty() && lrq.m_destinationInfo.GetSize() > 0) {
Toolkit::Instance()->GWRewriteE164(neighbor_id, GW_REWRITE_OUT, lrq.m_destinationInfo[0]);
}
if (!neighbor_gkid.IsEmpty() && (neighbor_gkid != neighbor_id) && lrq.m_destinationInfo.GetSize() > 0) {
Toolkit::Instance()->GWRewriteE164(neighbor_gkid, GW_REWRITE_OUT, lrq.m_destinationInfo[0]);
}
// include hopCount if configured and not already included
if (nb->GetDefaultHopCount() >= 1
&& !lrq.HasOptionalField(H225_LocationRequest::e_hopCount)) {
lrq.IncludeOptionalField(H225_LocationRequest::e_hopCount);
lrq.m_hopCount = nb->GetDefaultHopCount();
}
if (nb->OnSendingLRQ(lrq, m_lrq) && nb->SendLRQ(lrq_ras))
return info;
}
return nomatch;
}
// class LRQRequester
class LRQRequester : public RasRequester {
public:
LRQRequester(const LRQFunctor &);
virtual ~LRQRequester();
bool Send(NeighborList::List &, Neighbor * requester = NULL);
bool Send(Neighbor * nb);
int GetReqNumber() const { return m_requests.size(); }
H225_LocationConfirm * WaitForDestination(int timeout);
PString GetNeighborUsed() const { return m_neighbor_used; }
bool IsTraversalClient() const { return m_h46018_client; }
bool IsTraversalServer() const { return m_h46018_server; }
bool IsTraversalZone() const { return m_h46018_client || m_h46018_server; }
bool IsH46024Supported() const;
bool IsTLSNegotiated();
bool UseTLS() const { return m_useTLS; }
bool HasVendorInfo() const;
bool SupportLanguages() const;
PStringList GetLanguages() const;
// override from class RasRequester
virtual bool IsExpected(const RasMsg *) const;
virtual void Process(RasMsg *);
virtual bool OnTimeout();
private:
struct Request {
Request(Neighbor *n) : m_neighbor(n), m_reply(NULL), m_count(1) { }
Neighbor * m_neighbor;
RasMsg * m_reply;
int m_count;
};
typedef multimap<PrefixInfo, Request> Queue;
Queue m_requests;
PMutex m_rmutex;
const LRQFunctor & m_sendto;
RasMsg * m_result;
PString m_neighbor_used;
bool m_h46018_client, m_h46018_server;
bool m_useTLS;
};
class NeighborPingThread : public PThread, public RasRequester {
public:
NeighborPingThread(Neighbor * nb) : PThread(5000, AutoDeleteThread, NormalPriority, "NeighborPingThread"), m_nb(nb), m_stopThread(false) { }
virtual ~NeighborPingThread() { }
virtual void Main();
virtual void Process(RasMsg * ras);
virtual void StopThread() { m_stopThread = true; }
bool SendRequest(const Address & addr, WORD pt, int r);
protected:
Neighbor * m_nb;
bool m_stopThread;
};
void NeighborPingThread::Main()
{
int timeout = GkConfig()->GetInteger(LRQFeaturesSection, "NeighborTimeout", 5) * 100;
PString pingAlias = GkConfig()->GetString(LRQFeaturesSection, "PingAlias", "gatekeeper-monitoring-check");
H225_ArrayOf_AliasAddress aliases;
aliases.SetSize(1);
H323SetAliasAddress(pingAlias, aliases[0]);
while (!m_stopThread) {
AddFilter(H225_RasMessage::e_locationConfirm);
AddFilter(H225_RasMessage::e_locationReject);
m_rasSrv->RegisterHandler(this);
m_request = new H225_RasMessage();
m_nb->BuildLRQ(*m_request, m_seqNum, aliases);
SendRequest(m_nb->GetIP(), m_nb->GetPort(), 0); // no retries
bool signaled = m_sync.Wait(timeout);
if (!signaled) {
if (!m_nb->IsDisabled()) {
PTRACE(3, "NB\tPing timeout: Disabling neighbor " << m_nb->GetId());
m_nb->SetDisabled(true);
}
}
m_rasSrv->UnregisterHandler(this);
delete m_request;
m_request = NULL;
Suspend();
}
Terminate(); // stop thread and auto delete
}
void NeighborPingThread::Process(RasMsg * ras)
{
switch (ras->GetTag()) {
case H225_RasMessage::e_requestInProgress:
break;
case H225_RasMessage::e_locationConfirm:
case H225_RasMessage::e_locationReject:
if (m_nb->IsDisabled()) {
PTRACE(3, "NB\tPing successful: Activating neighbor " << m_nb->GetId());
m_nb->SetDisabled(false);
}
m_sync.Signal();
break;
default:
PTRACE(1, "RAS\tUnknown reply " << ras->GetTagName());
break;
}
delete ras;
}
bool NeighborPingThread::SendRequest(const Address & addr, WORD pt, int r)
{
m_txAddr = addr, m_txPort = pt, m_retry = r;
vector<Address> GKHome;
Toolkit::Instance()->GetGKHome(GKHome);
for (std::vector<Address>::iterator i = GKHome.begin(); i != GKHome.end(); ++i) {
if ((IsLoopback(addr) || IsLoopback(*i)) && addr != *i)
continue;
if (addr.GetVersion() != i->GetVersion())
continue;
GkInterface * inter = m_rasSrv->SelectInterface(*i);
if (inter == NULL)
return false;
RasListener *socket = inter->GetRasListener();
socket->SendRas(*m_request, addr, pt, NULL);
}
m_sentTime = PTime();
return true;
}
// class Neighbor
Neighbor::Neighbor()
{
m_rasSrv = RasServer::Instance();
m_port = 0;
m_forwardHopCount = 0;
m_dynamic = false;
m_acceptForwarded = true;
m_forwardResponse = false;
m_forwardto = 0;
m_externalGK = false;
m_keepAliveTimer = GkTimerManager::INVALID_HANDLE;
m_keepAliveTimerInterval = 0;
m_lrqPingTimer = GkTimerManager::INVALID_HANDLE;
m_lrqPingInterval = 0;
m_pingThread = NULL;
m_H46018Server = false;
m_H46018Client = false;
m_useTLS = false;
m_disabled = false;
m_loopDetection = false;
}
Neighbor::~Neighbor()
{
if (m_keepAliveTimer != GkTimerManager::INVALID_HANDLE)
Toolkit::Instance()->GetTimerManager()->UnregisterTimer(m_keepAliveTimer);
if (m_lrqPingTimer != GkTimerManager::INVALID_HANDLE)
Toolkit::Instance()->GetTimerManager()->UnregisterTimer(m_lrqPingTimer);
if (m_pingThread != NULL) {
m_pingThread->StopThread();
m_pingThread = NULL; // auto delete thread will delete itself
}
PTRACE(1, "NB\tDelete neighbor " << m_id);
}
bool Neighbor::SendLRQ(H225_RasMessage & lrq_ras)
{
if (!m_sendPassword.IsEmpty()) {
H225_LocationRequest & lrq = lrq_ras;
lrq.IncludeOptionalField(H225_LocationRequest::e_cryptoTokens);
lrq.m_cryptoTokens.SetSize(1);
SetCryptoGkTokens(lrq.m_cryptoTokens, m_sendAuthUser, m_sendPassword);
}
return m_rasSrv->SendRas(lrq_ras, GetIP(), m_port);
}
PIPSocket::Address Neighbor::GetIP() const
{
if (m_dynamic) {
PIPSocket::ClearNameCache();
// Retrieve the ip address at this time
if (!GetTransportAddress(m_name, GK_DEF_UNICAST_RAS_PORT, m_ip, m_port)) {
PTRACE(1, "NB\tCan't get neighbor ip for " << m_name);
}
}
return m_ip;
}
WORD Neighbor::GetPort() const
{
if (m_dynamic) {
PIPSocket::ClearNameCache();
// Retrieve the ip address at this time
if (!GetTransportAddress(m_name, GK_DEF_UNICAST_RAS_PORT, m_ip, m_port)) {
PTRACE(1, "NB\tCan't get neighbor port for " << m_name);
}
}
return m_port;
}
H225_LocationRequest & Neighbor::BuildLRQ(H225_RasMessage & lrq_ras, WORD seqnum, const H225_ArrayOf_AliasAddress & dest)
{
lrq_ras.SetTag(H225_RasMessage::e_locationRequest);
H225_LocationRequest & lrq = lrq_ras;
lrq.m_requestSeqNum = seqnum;
lrq.m_destinationInfo = dest;
// perform outbound per GK rewrite on the destination of the LRQ
Toolkit::Instance()->GWRewriteE164(m_id, GW_REWRITE_OUT, lrq.m_destinationInfo[0]);
if (m_gkid != m_id)
Toolkit::Instance()->GWRewriteE164(m_gkid, GW_REWRITE_OUT, lrq.m_destinationInfo[0]);
lrq.m_replyAddress = m_rasSrv->GetRasAddress(GetIP());
// lrq.IncludeOptionalField(H225_LocationRequest::e_gatekeeperIdentifier);
// lrq.m_gatekeeperIdentifier = Toolkit::GKName();
// lrq.IncludeOptionalField(H225_LocationRequest::e_nonStandardData);
// lrq.m_nonStandardData.m_data.SetValue(m_id);
lrq.IncludeOptionalField(H225_LocationRequest::e_sourceInfo);
lrq.m_sourceInfo.SetSize(1);
H323SetAliasAddress(Toolkit::GKName(), lrq.m_sourceInfo[0], H225_AliasAddress::e_h323_ID);
// TODO: is this right ?
if (m_externalGK) {
m_rasSrv->GetGkClient()->SetNBPassword(lrq, Toolkit::GKName());
}
if (m_forwardHopCount >= 1) { // what if set hopCount = 1?
lrq.IncludeOptionalField(H225_LocationRequest::e_hopCount);
lrq.m_hopCount = m_forwardHopCount;
}
return lrq;
}
bool Neighbor::SetProfile(const PString & id, const PString & type, bool reload)
{
PConfig *config = GkConfig();
PString section("Neighbor::" + (m_id = id));
m_gkid = config->GetString(section, "GatekeeperIdentifier", id);
m_name = config->GetString(section, "Host", "");
m_dynamic = Toolkit::AsBool(config->GetString(section, "Dynamic", "0"));
m_externalGK = false;
m_authUser = config->GetString(section, "AuthUser", m_gkid); // defaults to GatekeeperIdentifier
m_password = Toolkit::Instance()->ReadPassword(section, "Password"); // checking incoming password in LRQ (not implemented, yet)
m_sendAuthUser = config->GetString(section, "SendAuthUser", Toolkit::GKName()); // defaults to own GatekeeperId
m_sendPassword = Toolkit::Instance()->ReadPassword(section, "SendPassword"); // password to send to neighbor
#ifdef HAS_H46018
m_H46018Server = Toolkit::AsBool(config->GetString(section, "H46018Server", "0"));
#endif // HAS_H46018
if (!m_dynamic
#ifdef HAS_H46018
&& !m_H46018Server
#endif // HAS_H46018
&& !GetTransportAddress(m_name, GK_DEF_UNICAST_RAS_PORT, m_ip, m_port)) {
return false;
}
m_sendPrefixes.clear();
PString sprefix(config->GetString(section, "SendPrefixes", ""));
PStringArray sprefixes(sprefix.Tokenise(",", false));
for (PINDEX i = 0; i < sprefixes.GetSize(); ++i) {
PStringArray p(sprefixes[i].Tokenise(":=", false));
m_sendPrefixes[p[0]] = (p.GetSize() > 1) ? p[1].AsInteger() : 1;
}
m_sendIPs = config->GetString(section, "SendIPs", "");
PString salias(config->GetString(section, "SendAliases", ""));
PStringArray defs(salias.Tokenise(",", FALSE));
m_sendAliases.SetSize(0);
for (PINDEX i = 0; i < defs.GetSize(); i++) {
if (defs[i].Find("-") != P_MAX_INDEX) {
// range
PStringArray bounds(defs[i].Tokenise("-", FALSE));
PUInt64 lower = bounds[0].AsUnsigned64();
PUInt64 upper = 0;
if (bounds.GetSize() == 2) {
upper = bounds[1].AsUnsigned64();
} else {
PTRACE(1, "SendAliases: Invalid range definition: " << defs[i]);
continue;
}
if (upper <= lower) {
PTRACE(1, "SendAliases: Invalid range bounds: " << defs[i]);
continue;
}
PUInt64 num = upper - lower;
for (unsigned j = 0; j <= num; j++) {
PString number(lower + j);
PTRACE(4, "Adding alias " << number << " to neighbor " << m_id << " (from range)");
m_sendAliases.AppendString(number);
}
} else {
// single alias
PTRACE(4, "Adding alias " << defs[i] << " to neighbor " << m_id);
m_sendAliases.AppendString(defs[i]);
}
}
PString aprefix(config->GetString(section, "AcceptPrefixes", "*"));
m_acceptPrefixes = PStringArray(aprefix.Tokenise(",", false));
if (m_keepAliveTimer != GkTimerManager::INVALID_HANDLE)
Toolkit::Instance()->GetTimerManager()->UnregisterTimer(m_keepAliveTimer);
#ifdef HAS_H46018
if (Toolkit::AsBool(config->GetString(section, "H46018Client", "0"))) {
m_H46018Client = true;
// this is our initial interval, the server will tell the client the real interval
int h46018GkKeepAliveInterval = config->GetInteger(RoutedSec, "H46018KeepAliveInterval", 19);
SetH46018GkKeepAliveInterval(h46018GkKeepAliveInterval);
}
#endif // HAS_H46018
if (m_lrqPingTimer != GkTimerManager::INVALID_HANDLE)
Toolkit::Instance()->GetTimerManager()->UnregisterTimer(m_lrqPingTimer);
if (config->GetBoolean(LRQFeaturesSection, "SendLRQPing", false) || config->GetBoolean(section, "SendLRQPing", false)) {
SetLRQPingInterval(config->GetInteger(LRQFeaturesSection, "LRQPingInterval", 60));
} else {
if (m_pingThread != NULL) {
// config changed: we had a ping thread, but now we don't need it anymore
m_pingThread->StopThread();
m_pingThread = NULL; // auto delete thread will delete itself
}
}
#ifdef HAS_TLS
m_useTLS = Toolkit::AsBool(config->GetString(section, "UseTLS", "0")); // forced use of TLS
#endif
m_loopDetection = config->GetBoolean(LRQFeaturesSection, "LoopDetection", false);
SetForwardedInfo(section);
PString info = " of type " + type;
if (!sprefix)
info = " send=" + sprefix;
if (!aprefix)
info += " accept=" + aprefix;
PTRACE(1, "Set neighbor " << id << '(' << (m_dynamic ? m_name : AsString(m_ip, m_port)) << ')' << info);
if (!reload && (m_H46018Client || m_H46018Server)) {
// H.460 client and server start out disabled and get enabled on the first SCI/SCR
// don't do on reload, otherwise working neighbors become unavailable for a short time on config reload
SetDisabled(true);
}
return true;
}
void Neighbor::SendLRQPing(GkTimer * timer)
{
if (m_pingThread == NULL)
m_pingThread = new NeighborPingThread(this);
m_pingThread->Resume(); // send 1 ping, process and suspend yourself
}
void Neighbor::SetLRQPingInterval(int interval)
{
if (m_lrqPingInterval != interval) {
m_lrqPingInterval = interval;
if (m_keepAliveTimer != GkTimerManager::INVALID_HANDLE) {
Toolkit::Instance()->GetTimerManager()->UnregisterTimer(m_keepAliveTimer);
m_keepAliveTimer = GkTimerManager::INVALID_HANDLE;
}
if (m_lrqPingInterval > 0) {
PTime now;
m_keepAliveTimer = Toolkit::Instance()->GetTimerManager()->RegisterTimer(
this, &Neighbor::SendLRQPing, now, m_lrqPingInterval);
}
}
}
void Neighbor::SendH46018GkKeepAlive(GkTimer* timer)
{
#ifdef HAS_H46018
// TODO: set this neighbor to disabled if we didn't receive any messages since INTERVAL sec
// send SCI to open the pinhole to neighbor GK
H225_RasMessage sci_ras;
sci_ras.SetTag(H225_RasMessage::e_serviceControlIndication);
H225_ServiceControlIndication & sci = sci_ras;
sci.m_requestSeqNum = m_rasSrv->GetRequestSeqNum();
// Tandberg GK adds open here, the standard doesn't mention this
H225_ServiceControlSession controlOpen;
controlOpen.m_sessionId = 0;
controlOpen.m_reason = H225_ServiceControlSession_reason::e_open;
sci.m_serviceControl.SetSize(1);
sci.m_serviceControl[0] = controlOpen;
H460_FeatureStd feat = H460_FeatureStd(18);
sci.IncludeOptionalField(H225_ServiceControlIndication::e_featureSet);
sci.m_featureSet.IncludeOptionalField(H225_FeatureSet::e_supportedFeatures);
H225_ArrayOf_FeatureDescriptor & desc = sci.m_featureSet.m_supportedFeatures;
desc.SetSize(1);
desc[0] = feat;
if (!m_sendPassword.IsEmpty()) {
sci.IncludeOptionalField(H225_ServiceControlIndication::e_cryptoTokens);
sci.m_cryptoTokens.SetSize(1);
SetCryptoGkTokens(sci.m_cryptoTokens, m_sendAuthUser, m_sendPassword);
}
m_rasSrv->SendRas(sci_ras, GetIP(), m_port);
#endif
}
void Neighbor::SetH46018GkKeepAliveInterval(int interval)
{
if (m_keepAliveTimerInterval != interval) {
m_keepAliveTimerInterval = interval;
if (m_keepAliveTimer != GkTimerManager::INVALID_HANDLE)
Toolkit::Instance()->GetTimerManager()->UnregisterTimer(m_keepAliveTimer);
if (m_keepAliveTimerInterval > 0) {
PTime now;
m_keepAliveTimer = Toolkit::Instance()->GetTimerManager()->RegisterTimer(
this, &Neighbor::SendH46018GkKeepAlive, now, m_keepAliveTimerInterval); // do it now and every n seconds
}
}
}
// initialize neighbor object created by SRV policy
bool Neighbor::SetProfile(const PString & name, const H323TransportAddress & addr)
{
addr.GetIpAndPort(m_ip, m_port);
m_id = "SRVrec";
m_name = name;
m_dynamic = false;
m_externalGK = true;
m_sendPrefixes.clear();
m_sendPrefixes["*"] = 1;
SetForwardedInfo(LRQFeaturesSection);
return true;
}
PrefixInfo Neighbor::GetPrefixInfo(const H225_ArrayOf_AliasAddress & aliases, H225_ArrayOf_AliasAddress & dest)
{
if (IsDisabled()) {
PTRACE(3, "NB\tSkipping disabled neighbor " << GetId());
return nomatch;
}
Prefixes::iterator iter, biter = m_sendPrefixes.begin(), eiter = m_sendPrefixes.end();
for (PINDEX i = 0; i < aliases.GetSize(); ++i) {
H225_AliasAddress & alias = aliases[i];
// send by alias type
iter = m_sendPrefixes.find(alias.GetTagName());
if (iter != eiter) {
dest.SetSize(1);
dest[0] = alias;
return PrefixInfo(100, (short)iter->second);
}
PString destination(AsString(alias, false));
// send by exact alias match
for (PINDEX j = 0; j < m_sendAliases.GetSize(); j++) {
if (destination == m_sendAliases[j]) {
dest.SetSize(1);
dest[0] = alias;
return PrefixInfo(100, 1);
}
}
// send by prefix
while (iter != biter) {
--iter; // search in reverse order
const int len = MatchPrefix(destination, iter->first);
if (len < 0) {
return nomatch;
}
else if (len > 0) {
dest.SetSize(1);
dest[0] = alias;
return PrefixInfo((short)len, (short)iter->second);
}
}
}
// send always ? (handled last, treated as shortest match)
iter = m_sendPrefixes.find("*");
if (iter == eiter)
return nomatch;
dest = aliases;
return PrefixInfo(0, (short)iter->second);
}
PrefixInfo Neighbor::GetIPInfo(const H225_TransportAddress & ip, H225_ArrayOf_AliasAddress & dest) const
{
if (IsDisabled()) {
PTRACE(3, "NB\tSkipping disabled neighbor " << GetId());
return nomatch;
}
PStringArray sendNet(m_sendIPs.Tokenise(","));
for (PINDEX i = 0; i < sendNet.GetSize(); ++i) {
bool noMatch = false;
if (sendNet[i].Left(1) == "!") {
noMatch = true;
sendNet[i] = sendNet[i].Mid(1); // cut away first char ("!")
}
NetworkAddress network = NetworkAddress(sendNet[i]);
PIPSocket::Address addr;
bool validNetwork = GetIPFromTransportAddr(ip, addr);
if ((sendNet[i] == "*")
|| ((sendNet[i] == "public") && !IsPrivate(addr))
|| ((sendNet[i] == "private") && IsPrivate(addr))
|| (validNetwork && !noMatch && (NetworkAddress(addr) << network))
|| (validNetwork && noMatch && !(NetworkAddress(addr) << network)) )
{
dest.SetSize(1);
H323SetAliasAddress(AsDotString(ip), dest[0], H225_AliasAddress::e_transportID);
return PrefixInfo(100, 1);
}
}
return nomatch; // don't send to this neighbor
}
bool Neighbor::OnSendingLRQ(H225_LocationRequest & lrq)
{
return true;
}
bool Neighbor::OnSendingLRQ(H225_LocationRequest & lrq, const AdmissionRequest &)
{
return OnSendingLRQ(lrq);
}
bool Neighbor::OnSendingLRQ(H225_LocationRequest & lrq, const LocationRequest & orig_lrq)
{
// adjust hopCount to be lesser or equal to the original value
if (orig_lrq.GetRequest().HasOptionalField(H225_LocationRequest::e_hopCount)) {
if (lrq.HasOptionalField(H225_LocationRequest::e_hopCount)) {
if (lrq.m_hopCount > orig_lrq.GetRequest().m_hopCount)
lrq.m_hopCount = orig_lrq.GetRequest().m_hopCount;
} else {
lrq.IncludeOptionalField(H225_LocationRequest::e_hopCount);
lrq.m_hopCount = orig_lrq.GetRequest().m_hopCount;
}
}
// copy over canMapAlias
if (orig_lrq.GetRequest().HasOptionalField(H225_LocationRequest::e_canMapAlias)) {
lrq.IncludeOptionalField(H225_LocationRequest::e_canMapAlias);
lrq.m_canMapAlias = orig_lrq.GetRequest().m_canMapAlias;
}
if (m_loopDetection) {
if (orig_lrq.GetRequest().HasOptionalField(H225_LocationRequest::e_callIdentifier)) {
lrq.IncludeOptionalField(H225_LocationRequest::e_callIdentifier);
lrq.m_callIdentifier = orig_lrq.GetRequest().m_callIdentifier;
}
if (orig_lrq.GetRequest().HasOptionalField(H225_LocationRequest::e_sourceEndpointInfo)) {
lrq.IncludeOptionalField(H225_LocationRequest::e_sourceEndpointInfo);
lrq.m_sourceEndpointInfo = orig_lrq.GetRequest().m_sourceEndpointInfo;
}
}
return OnSendingLRQ(lrq);
}
bool Neighbor::OnSendingLRQ(H225_LocationRequest & lrq, const SetupRequest &)
{
return OnSendingLRQ(lrq);
}
bool Neighbor::OnSendingLRQ(H225_LocationRequest & lrq, const FacilityRequest &)
{
return OnSendingLRQ(lrq);
}
bool Neighbor::CheckReply(RasMsg *ras) const
{
if( ras->IsFrom(GetIP(), 0) )
return true;
const H225_NonStandardParameter *param = ras->GetNonStandardParam();
if (param == NULL)
return false;
int iec = Toolkit::iecUnknown;
if (param->m_nonStandardIdentifier.GetTag() == H225_NonStandardIdentifier::e_h221NonStandard) {
iec = Toolkit::Instance()->GetInternalExtensionCode((const H225_H221NonStandard&)param->m_nonStandardIdentifier);
} else if (param->m_nonStandardIdentifier.GetTag() == H225_NonStandardIdentifier::e_object) {
const PASN_ObjectId &oid = param->m_nonStandardIdentifier;
if (oid.GetDataLength() == 0)
iec = Toolkit::iecNeighborId;
}
return iec == Toolkit::iecNeighborId
? strncmp(m_id, param->m_data.AsString(), m_id.GetLength()) == 0
: false;
}
bool Neighbor::Authenticate(RasMsg *ras) const
{
if (m_password.IsEmpty()) {
return true; // no password, no check needed
} else {
// check tokens
H225_ArrayOf_CryptoH323Token tokens;
// check LRQs and SCIs
switch (ras->GetTag()) {
case H225_RasMessage::e_locationRequest:
{
H225_LocationRequest & lrq = (*ras)->m_recvRAS;
if (lrq.HasOptionalField(H225_LocationRequest::e_cryptoTokens))
tokens = lrq.m_cryptoTokens;
}
break;
case H225_RasMessage::e_serviceControlIndication:
{
H225_ServiceControlIndication & sci = (*ras)->m_recvRAS;
if (sci.HasOptionalField(H225_ServiceControlIndication::e_cryptoTokens))
tokens = sci.m_cryptoTokens;
}
break;
default:
break;
}
H235AuthSimpleMD5 authMD5;
PBYTEArray dummy;
authMD5.SetLocalId(m_authUser);
authMD5.SetPassword(m_password);
for (PINDEX i = 0 ; i < tokens.GetSize(); i++) {
H225_CryptoH323Token cryptoToken;
if (tokens[i].GetTag() == H225_CryptoH323Token::e_cryptoGKPwdHash) {
// convert the GKPwdHash into an EPPwdHash that H323Plus is able to check
H225_CryptoH323Token_cryptoGKPwdHash & cryptoGKPwdHash = tokens[i];
cryptoToken.SetTag(H225_CryptoH323Token::e_cryptoEPPwdHash);
H225_CryptoH323Token_cryptoEPPwdHash & cryptoEPPwdHash = cryptoToken;
H323SetAliasAddress(cryptoGKPwdHash.m_gatekeeperId, cryptoEPPwdHash.m_alias);
cryptoEPPwdHash.m_timeStamp = cryptoGKPwdHash.m_timeStamp;
cryptoEPPwdHash.m_token.m_algorithmOID = OID_MD5;
cryptoEPPwdHash.m_token.m_hash = cryptoGKPwdHash.m_token.m_hash;
} else {
cryptoToken = tokens[i]; // use other tokens as they are
}
if (authMD5.ValidateCryptoToken(cryptoToken, dummy) == H235Authenticator::e_OK) {
PTRACE(5, "Neighbor\tMD5 password match");
return true;
}
}
PTRACE(1, "Neighbor\tPassword required, but no match");
return false; // no token found that allows access
}
}
bool Neighbor::IsAcceptable(RasMsg *ras) const
{
if (ras->IsFrom(GetIP(), 0)) {
// ras must be an LRQ
H225_LocationRequest & lrq = (*ras)->m_recvRAS;
PINDEX i, j, sz = m_acceptPrefixes.GetSize();
H225_ArrayOf_AliasAddress & aliases = lrq.m_destinationInfo;
for (j = 0; j < aliases.GetSize(); ++j) {
H225_AliasAddress & alias = aliases[j];
for (i = 0; i < sz; ++i) {
if (m_acceptPrefixes[i] == alias.GetTagName()) {
return true;
}
}
PString destination(AsString(alias, false));
int maxlen = 0;
for (i = 0; i < sz; ++i) {
const PString & prefix = m_acceptPrefixes[i];
const int len = MatchPrefix(destination, prefix);
if (len < 0)
return false;
else if (len > maxlen)
maxlen = len;
}
if (maxlen > 0)
return true;
}
for (i = 0; i < sz; ++i) {
if (m_acceptPrefixes[i] == "*") {
return true;
}
}
}
return false;
}
void Neighbor::SetForwardedInfo(const PString & section)
{
PConfig * config = GkConfig();
m_forwardHopCount = (WORD)config->GetInteger(section, "ForwardHopCount", config->GetInteger(LRQFeaturesSection, "ForwardHopCount", 0));
m_acceptForwarded = config->GetBoolean(section, "AcceptForwardedLRQ", config->GetBoolean(LRQFeaturesSection, "AcceptForwardedLRQ", true));
m_forwardResponse = config->GetBoolean(section, "ForwardResponse", config->GetBoolean(LRQFeaturesSection, "ForwardResponse", true));
PString forwardto(config->GetString(section, "ForwardLRQ", config->GetString(LRQFeaturesSection, "ForwardLRQ", "0")));
if (forwardto *= "never")
m_forwardto = -1;
else if (forwardto *= "always")
m_forwardto = 1;
else
m_forwardto = 0;
}
// class OldGK
bool OldGK::SetProfile(const PString & id, const PString & args)
{
m_authUser = m_id = m_gkid = id;
PStringArray cfg(args.Tokenise(";", true));
m_name = cfg[0].Trim();
m_sendPrefixes.clear();
if (cfg.GetSize() > 1) {
PStringArray p = cfg[1].Tokenise(",", false);
for (PINDEX i = 0; i < p.GetSize(); ++i)
m_sendPrefixes[p[i]] = 1;
} else
m_sendPrefixes["*"] = 1;
m_acceptPrefixes.SetSize(1);
m_acceptPrefixes[0] = "*";
if (cfg.GetSize() > 2)
m_password = cfg[2];
m_dynamic = (cfg.GetSize() > 3) ? Toolkit::AsBool(cfg[3]) : false;
if (!m_dynamic && !GetTransportAddress(m_name, GK_DEF_UNICAST_RAS_PORT, m_ip, m_port))
return false;
SetForwardedInfo(LRQFeaturesSection);
if (Toolkit::AsBool(GkConfig()->GetString(LRQFeaturesSection, "AlwaysForwardLRQ", "0")))
m_forwardto = 1;
PTRACE(1, "Set neighbor " << m_gkid << '(' << (m_dynamic ? m_name : AsString(m_ip, m_port)) << ')' << (cfg.GetSize() > 1 ? (" for prefix " + cfg[1]) : PString::Empty()));
return true;
}
// class GnuGK
bool GnuGK::OnSendingLRQ(H225_LocationRequest & lrq, const AdmissionRequest & request)
{
lrq.IncludeOptionalField(H225_LocationRequest::e_gatekeeperIdentifier);
lrq.m_gatekeeperIdentifier = Toolkit::GKName();
lrq.IncludeOptionalField(H225_LocationRequest::e_nonStandardData);
lrq.m_nonStandardData.m_nonStandardIdentifier.SetTag(H225_NonStandardIdentifier::e_h221NonStandard);
H225_H221NonStandard & t35 = lrq.m_nonStandardData.m_nonStandardIdentifier;
t35.m_t35CountryCode = Toolkit::t35cPoland;
t35.m_manufacturerCode = Toolkit::t35mGnuGk;
t35.m_t35Extension = Toolkit::t35eNeighborId;
lrq.m_nonStandardData.m_data.SetValue(m_id);
const H225_AdmissionRequest & arq = request.GetRequest();
lrq.IncludeOptionalField(H225_LocationRequest::e_sourceInfo);
lrq.m_sourceInfo = arq.m_srcInfo;
if (arq.HasOptionalField(H225_AdmissionRequest::e_canMapAlias)) {
lrq.IncludeOptionalField(H225_LocationRequest::e_canMapAlias);
lrq.m_canMapAlias = arq.m_canMapAlias;
}
// must include callID to traversal servers and clients, no harm to always include it
if (arq.HasOptionalField(H225_AdmissionRequest::e_callIdentifier)) {
lrq.IncludeOptionalField(H225_LocationRequest::e_callIdentifier);
lrq.m_callIdentifier = arq.m_callIdentifier;
}
lrq.IncludeOptionalField(H225_LocationRequest::e_sourceEndpointInfo);
lrq.m_sourceEndpointInfo = arq.m_srcInfo;
if (m_loopDetection) {
CallLoopTable::Instance()->CollectLoopData(lrq, "");
}
#if defined(HAS_TLS) && defined(HAS_H460)
// H.460.22
if (RasServer::Instance()->IsGKRouted()) {
// in routed mode we signal gatekeeper capabilities
if (Toolkit::Instance()->IsTLSEnabled()) {
// include H.460.22 in supported features
H460_FeatureStd h46022 = H460_FeatureStd(22);
H460_FeatureStd settings;
settings.Add(Std22_Priority, H460_FeatureContent(1, 8)); // Priority=1, type=number8
WORD tlsSignalPort = (WORD)GkConfig()->GetInteger(RoutedSec, "TLSCallSignalPort", GK_DEF_TLS_CALL_SIGNAL_PORT);
H225_TransportAddress h225Addr = m_rasSrv->GetRasAddress(GetIP());
SetH225Port(h225Addr, tlsSignalPort);
H323TransportAddress signalAddr = h225Addr;
settings.Add(Std22_ConnectionAddress, H460_FeatureContent(signalAddr));
h46022.Add(Std22_TLS, H460_FeatureContent(settings.GetCurrentTable()));
lrq.IncludeOptionalField(H225_LocationRequest::e_featureSet);