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Toolkit.cxx
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Toolkit.cxx
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//////////////////////////////////////////////////////////////////
//
// Toolkit base class for the GnuGk
//
// Copyright (c) 2000-2022, 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/cypher.h>
#include <ptclib/http.h>
#include <h323pdu.h>
#include <map>
#include <vector>
#include <cstdlib>
#ifndef _WIN32
#include <unistd.h>
#endif // _WIN32
#include "stl_supp.h"
#include "gktimer.h"
#include "h323util.h"
#include "GkStatus.h"
#include "gkconfig.h"
#if HAS_DATABASE
#include "gksql.h"
#endif
#include "clirw.h"
#include "capctrl.h"
#include "RasSrv.h"
#include "Toolkit.h"
#include "gk_const.h"
#include "SoftPBX.h"
#include "snmp.h"
#include "gk.h"
#ifdef H323_H350
const char * H350Section = "GkH350::Settings";
#include <ptclib/pldap.h>
#include "h350/h350.h"
#endif
#ifdef HAS_LIBCURL
#include <curl/curl.h>
#endif // HAS_LIBCURL
#ifdef HAS_OLM
#include "api/license++.h"
#include "pc-identifiers.h"
#endif
#if (!_WIN32) && (GCC_VERSION >= 40600)
#pragma GCC diagnostic ignored "-Wstrict-overflow"
#endif
using namespace std;
PIPSocket::Address GNUGK_INADDR_ANY(INADDR_ANY);
PReadWriteMutex ConfigReloadMutex;
PSemaphore ShutdownMutex(1, 1);
bool ShutdownFlag = false; // you may only set this flag if you own the ShutdownMutex, once it is set, it can never be cleared!
bool g_disableSettingUDPSourceIP = false;
extern const char *ProxySection;
extern const char *RoutedSec;
extern const char *TLSSec;
extern int g_maxSocketQueue;
bool IsGatekeeperShutdown()
{
return ShutdownFlag;
}
namespace {
const PString paddingByteConfigKey("KeyFilled");
const BYTE AnyRawAddress[16] = {
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255
};
} /* namespace */
NetworkAddress::NetworkAddress() : m_address(0), m_netmask(0)
{
}
NetworkAddress::NetworkAddress(
const PIPSocket::Address & addr
) : m_address(addr), m_netmask(addr.GetSize(), AnyRawAddress)
{
}
NetworkAddress::NetworkAddress(
const PIPSocket::Address & addr,
const PIPSocket::Address & nm
) : m_netmask(nm)
{
// normalize the address
if (addr.GetSize() == nm.GetSize()) {
BYTE rawdata[16];
const unsigned sz = addr.GetSize();
for (unsigned i = 0; i < sz; i++)
rawdata[i] = addr[i] & nm[i];
m_address = PIPSocket::Address(sz, rawdata);
} else {
PTRACE(1, "Error: Non-matching network and netmask");
}
}
NetworkAddress::NetworkAddress(
const PString & str /// an address in a form A.B.C.D, A.B.C.D/24 or A.B.C.D/255.255.255.0
)
{
Toolkit::GetNetworkFromString(str, m_address, m_netmask);
}
unsigned NetworkAddress::GetNetmaskLen() const
{
unsigned len = 0;
const unsigned sz = m_netmask.GetSize() * 8;
const char *rawdata = m_netmask.GetPointer();
for (int b = sz - 1; b >= 0; b--)
if (rawdata[b >> 3] & (0x80 >> (b & 7)))
break;
else
len++;
return sz - len;
}
bool NetworkAddress::operator==(const NetworkAddress & addr) const
{
if (m_address.GetSize() != addr.m_address.GetSize())
return false;
const unsigned sz = m_address.GetSize();
for (unsigned i = 0; i < sz; i++)
if (m_address[i] != addr.m_address[i] || m_netmask[i] != addr.m_netmask[i])
return false;
return true;
}
bool NetworkAddress::operator==(const PIPSocket::Address & addr) const
{
if (m_address.GetSize() != addr.GetSize())
return false;
const unsigned sz = m_address.GetSize();
for (unsigned i = 0; i < sz; i++)
if (m_netmask[i] != 255 || m_address[i] != addr[i])
return false;
return true;
}
bool NetworkAddress::operator>>(const NetworkAddress & addr) const
{
if (m_address.GetSize() != addr.m_address.GetSize())
return false;
const unsigned sz = m_address.GetSize();
for (unsigned i = 0; i < sz; i++)
if (m_netmask[i] != (addr.m_netmask[i] & m_netmask[i])
|| m_address[i] != (addr.m_address[i] & m_netmask[i]))
return false;
return true;
}
bool NetworkAddress::operator<<(const NetworkAddress & addr) const
{
return addr >> *this;
}
bool NetworkAddress::operator>>(const PIPSocket::Address & addr) const
{
if (m_address.GetSize() != addr.GetSize())
return false;
const unsigned sz = m_address.GetSize();
for (unsigned i = 0; i < sz; i++)
if (m_address[i] != (addr[i] & m_netmask[i]))
return false;
return true;
}
int NetworkAddress::Compare(const NetworkAddress & addr) const
{
int diff = m_address.GetSize() - addr.m_address.GetSize();
if (diff == 0) {
diff = GetNetmaskLen() - addr.GetNetmaskLen();
if (diff == 0) {
const unsigned sz = m_address.GetSize();
for (unsigned i = 0; i < sz; i++) {
diff = m_address[i] - addr.m_address[i];
if (diff != 0)
break;
}
}
}
return diff;
}
PString NetworkAddress::AsString() const
{
return m_address.AsString() + "/" + PString(GetNetmaskLen());
}
bool NetworkAddress::IsAny() const
{
return m_address.IsAny() && (GetNetmaskLen() == 0);
}
bool NetworkAddress::operator<(const NetworkAddress & addr) const
{
return Compare(addr) < 0;
}
bool NetworkAddress::operator<=(const NetworkAddress & addr) const
{
return Compare(addr) <= 0;
}
bool NetworkAddress::operator>(const NetworkAddress & addr) const
{
return Compare(addr) > 0;
}
bool NetworkAddress::operator>=(const NetworkAddress & addr) const
{
return Compare(addr) >= 0;
}
bool operator==(const PIPSocket::Address & addr, const NetworkAddress & net)
{
return net == addr;
}
bool operator<<(const PIPSocket::Address & addr, const NetworkAddress & net)
{
return net >> addr;
}
// class Toolkit::RouteTable::RouteEntry
Toolkit::RouteTable::RouteEntry::RouteEntry(const PString & net) : PIPSocket::RouteEntry(0)
{
if (net.Find('-') != P_MAX_INDEX) {
// format: net/mask-dest eg. 10.0.0.0/8-20.1.1.1
destination = net.Tokenise("-", FALSE)[1];
GetNetworkFromString(net.Tokenise("-", FALSE)[0], network, net_mask);
} else {
// format: net/mask-dest eg. 10.1.1.1/8
destination = net.Tokenise("/", FALSE)[0];
GetNetworkFromString(net, network, net_mask);
}
}
Toolkit::RouteTable::RouteEntry::RouteEntry(
const PIPSocket::RouteEntry & re,
const InterfaceTable & it
) : PIPSocket::RouteEntry(re)
{
// look at the interface table which local IP to use for this route entry
PINDEX i;
// try to select outgoing IP from network - check if IP is valid with netmask
for (i = 0; i < it.GetSize(); ++i) {
const Address & ip = it[i].GetAddress();
if (Toolkit::Instance()->IsGKHome(ip) && CompareWithMask(&ip)) {
destination = ip;
return;
}
}
for (i = 0; i < it.GetSize(); ++i) {
const Address & ip = it[i].GetAddress();
if (Toolkit::Instance()->IsGKHome(ip) && CompareWithoutMask(&ip)) { // skip IPs we don't listen to
destination = ip;
return;
}
}
for (i = 0; i < it.GetSize(); ++i) {
if ((it[i].GetName() == interfaceName) && Toolkit::Instance()->IsGKHome(it[i].GetAddress())) {
destination = it[i].GetAddress();
return;
}
}
}
inline bool Toolkit::RouteTable::RouteEntry::CompareWithoutMask(const Address *ip) const
{
return (*ip == destination) || (((*ip & net_mask) == network) && (ip->GetVersion() == network.GetVersion()));
}
bool Toolkit::RouteTable::RouteEntry::CompareWithMask(const Address *ip) const
{
if (ip->GetVersion() != network.GetVersion())
return false;
#if P_HAS_IPV6
PINDEX mmax = ip->GetVersion() == 6 ? 16 : 4;
#else
PINDEX mmax = 4;
#endif
bool maskValid = true;
bool networkStarted = false; // this is a non-zero network byte
for (PINDEX m = mmax - 1; m >= 0 ; --m) {
BYTE ipByte = (*ip)[m];
BYTE maskByte = net_mask[m];
if (maskByte == 0) {
if (networkStarted && (ipByte > 0)){
return false;
}
// mask non-zero bits not reached yet
continue;
}
networkStarted = true;
BYTE match = (unsigned char)ipByte & (unsigned char)maskByte;
if ((unsigned char)match != (unsigned char)network[m]){
maskValid = false;
break;
}
}
return (maskValid);
}
// class Toolkit::RouteTable
void Toolkit::RouteTable::InitTable()
{
// workaround for OS that don't support GetRouteTable
PIPSocket::GetHostAddress(defAddr);
#ifdef hasIPV6
PIPSocket::GetHostAddress(defAddrV6);
#endif
ClearTable();
if (!CreateTable())
return;
// get Home IPs (all detected IPs or set through config file)
std::vector<PIPSocket::Address> home;
Toolkit::Instance()->GetGKHome(home);
// if we only have 1 Home IP, then thats also the default IP
if (home.size() == 1) {
defAddr = home[0];
#ifdef hasIPV6
defAddrV6 = home[0];
#endif
}
// Bind= always sets the default IP
PString bind = GkConfig()->GetString("Bind", "");
if (!bind.IsEmpty()) {
defAddr = bind;
#ifdef hasIPV6
defAddrV6 = bind;
#endif
}
// if we do not already have a valid entry, try and retrieve the default interface
if ((defAddr.GetVersion() != 4) || defAddr.IsLoopback() || !defAddr.IsValid()) {
// Set default IP according to route table
defAddr = GetDefaultIP(4);
if ((defAddr.GetVersion() != 4) || defAddr.IsLoopback() || !defAddr.IsValid()) {
// no default gateway, use first interface as default
PIPSocket::GetNetworkInterface(defAddr);
}
}
#ifdef hasIPV6
// if we do not already have a valid entry, try and retrieve the default interface
if ((defAddrV6.GetVersion() != 6) || defAddrV6.IsLoopback() || !defAddrV6.IsValid()) {
// Set default IP according to route table
defAddrV6 = GetDefaultIP(6);
if ((defAddrV6.GetVersion() != 6) || defAddrV6.IsLoopback() || !defAddrV6.IsValid()) {
// no default gateway, use first interface as default
PIPSocket::GetNetworkInterface(defAddrV6);
}
}
#endif
// if we have a list of Home IPs and the default address is not in it, use the first IPv4 Home IP,
// unless the default IP was explicitly specified in Bind=
if (bind.IsEmpty() &&
!home.empty() && (find(home.begin(), home.end(), defAddr) == home.end())) {
for (unsigned i = 0; i < home.size(); ++i) {
if (home[i].GetVersion() == 4) {
defAddr = home[i];
break;
}
}
}
#ifdef hasIPV6
if (bind.IsEmpty() &&
!home.empty() && (find(home.begin(), home.end(), defAddrV6) == home.end())) {
for (unsigned i = 0; i < home.size(); ++i) {
if (home[i].GetVersion() == 6) {
defAddrV6 = home[i];
break;
}
}
}
#endif
for (RouteEntry *entry = rtable_begin; entry != rtable_end; ++entry) {
PTRACE(2, "Network=" << NetworkAddress(entry->GetNetwork(), entry->GetNetMask()).AsString() <<
", IP=" << entry->GetDestination());
}
#ifdef hasIPV6
if (Toolkit::Instance()->IsIPv6Enabled())
PTRACE(2, "Default IP IPv4=" << defAddr << " IPv6=" << defAddrV6);
else
#endif
{
PTRACE(2, "Default IP=" << defAddr);
}
if (defAddr.IsLoopback()) {
PTRACE(1, "WARNING: Your default IP=" << defAddr << " is a loopback address. That probably won't work!");
}
}
// get default route from route table, because GetGatewayAddress() is broken until PTLib 2.11.1
PIPSocket::Address Toolkit::RouteTable::GetDefaultIP(unsigned version) const
{
for (RouteEntry *entry = rtable_begin; entry != rtable_end; ++entry) {
if ((entry->GetNetMask() == 0) && (entry->GetDestination().GetVersion() == version))
return GetLocalAddress(entry->GetDestination());
}
return Address(0);
}
void Toolkit::RouteTable::ClearTable()
{
if (rtable_begin) {
for (RouteEntry *r = rtable_begin; r != rtable_end; ++r)
r->~RouteEntry();
::free(rtable_begin);
rtable_begin = 0;
}
}
void Toolkit::RouteTable::ClearInternalNetworks()
{
m_internalnetworks.clear();
}
void Toolkit::RouteTable::AddInternalNetwork(const NetworkAddress & network)
{
if (find(m_internalnetworks.begin(), m_internalnetworks.end(), network) == m_internalnetworks.end())
m_internalnetworks.push_back(network);
}
PIPSocket::Address Toolkit::RouteTable::GetLocalAddress(unsigned version) const
{
#ifdef hasIPV6
if (version == 6)
return defAddrV6;
#endif
return defAddr;
}
PIPSocket::Address Toolkit::RouteTable::GetLocalAddress(const Address & addr) const
{
// look through internal networks and make sure we don't return the external IP for them
for (unsigned j = 0; j < m_internalnetworks.size(); ++j) {
if (addr << m_internalnetworks[j]) {
// check if internal network is in route table, but don't use the default route
RouteEntry *entry = find_if(rtable_begin, rtable_end,
bind2nd(mem_fun_ref(&RouteEntry::CompareWithoutMask), &addr));
if ((entry != rtable_end) && (entry->GetNetMask() != INADDR_ANY)
#ifdef hasIPV6
&& (entry->GetNetMask() != in6addr_any)
#endif
) {
return entry->GetDestination();
}
else {
#ifdef hasIPV6
if (addr.GetVersion() == 6)
return defAddrV6;
#endif
return defAddr;
}
}
}
// if external IP is configured
if (!ExtIP.IsEmpty()) {
if (DynExtIP) { // if dynamic resolve DNS entry
PIPSocket::Address extip;
H323TransportAddress ex = H323TransportAddress(ExtIP);
ex.GetIpAddress(extip);
if (extip.IsValid()) {
return extip;
} else {
PTRACE(2, "NAT\tERROR: External IP " << ExtIP << " unresolvable." );
SNMP_TRAP(10, SNMPError, Configuration, "External IP " + ExtIP + " unresolvable");
}
} else { // If valid IP then use the ExtIP value
PIPSocket::Address extip(ExtIP);
if (extip.IsValid()) {
return extip;
} else {
PTRACE(2, "NAT\tERROR: ExtIP " << ExtIP << " unusable." );
SNMP_TRAP(10, SNMPError, Configuration, "External IP " + ExtIP + " unusable");
}
}
}
RouteEntry *entry = find_if(rtable_begin, rtable_end,
bind2nd(mem_fun_ref(&RouteEntry::CompareWithMask), &addr));
if (entry != rtable_end) {
return entry->GetDestination();
}
#ifdef hasIPV6
if (addr.GetVersion() == 6) {
return defAddrV6;
}
#endif
return defAddr;
}
bool Toolkit::RouteTable::CreateRouteTable(const PString & extroute)
{
InterfaceTable if_table;
if (!PIPSocket::GetInterfaceTable(if_table)) {
PTRACE(1, "Error: Can't get interface table");
SNMP_TRAP(10, SNMPError, Configuration, "Error fetching interface table");
return false;
}
PTRACE(4, "InterfaceTable:\n" << setfill('\n') << if_table << setfill(' '));
PIPSocket::RouteTable r_table;
if (!PIPSocket::GetRouteTable(r_table)) {
PTRACE(1, "Error: Can't get route table");
SNMP_TRAP(10, SNMPError, Configuration, "Error fetching route table");
return false;
}
// filter out route with destination localhost
// we can't use those for routing calls, unless the net itself is localhost
for(PINDEX i = 0; i < r_table.GetSize(); ++i) {
if ((r_table[i].GetDestination().IsLoopback())
&& !r_table[i].GetNetwork().IsLoopback()) {
r_table.RemoveAt(i--);
}
}
// filter out IPv6 networks if IPv6 is not enabled
for(PINDEX i = 0; i < r_table.GetSize(); ++i) {
if ((r_table[i].GetNetwork().GetVersion() == 6)
&& !Toolkit::Instance()->IsIPv6Enabled()) {
r_table.RemoveAt(i--);
}
}
if (AsBool(GkConfig()->GetString(ProxySection, "Enable", "0"))) {
for (PINDEX i = 0; i < r_table.GetSize(); ++i) {
if (IsPrivate(r_table[i].GetNetwork())
&& (r_table[i].GetNetMask().AsString() != "255.255.255.255")
&& (r_table[i].GetNetMask().AsString() != "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")) {
m_internalnetworks.resize( m_internalnetworks.size() + 1);
m_internalnetworks[m_internalnetworks.size() - 1] = NetworkAddress(r_table[i].GetNetwork(), r_table[i].GetNetMask());
PTRACE(2, "Internal Network Detected " << m_internalnetworks.back().AsString());
}
}
}
PString tmpRoutes = GkConfig()->GetString(ProxySection, "ExplicitRoutes", "");
PStringArray explicitRoutes;
if (!tmpRoutes.IsEmpty()) {
explicitRoutes = tmpRoutes.Tokenise(",", false);
PString defaultRoute;
PINDEX e = 0;
while (e < explicitRoutes.GetSize()) {
PString explicitRoute = explicitRoutes[e].Trim();
if (explicitRoute.Left(9) == "0.0.0.0/0" || PCaselessString(explicitRoute.Left(7)) == "default") {
explicitRoutes.RemoveAt(e);
defaultRoute = explicitRoute;
} else {
RouteEntry entry(explicitRoute);
if (Toolkit::Instance()->IsGKHome(entry.GetDestination())) {
PTRACE(2, "Adding explicit route: " << entry.GetNetwork() << "/" << entry.GetNetMask() << "->" << entry.GetDestination());
e++;
} else {
PTRACE(1, "Ignoring explicit route (invalid source IP): "
<< entry.GetNetwork() << "/" << entry.GetNetMask() << "->" << entry.GetDestination());
explicitRoutes.RemoveAt(e);
}
}
}
if (!defaultRoute.IsEmpty()) {
// replace 0.0.0.0/0 or "default" with 2 routes (0.0.0.0/1 + 128.0.0.0/1), because "0.0.0.0/0" is also treated as invalid network
if (PCaselessString(defaultRoute.Left(7)) == "default") {
defaultRoute = PString("0.0.0.0/0") + defaultRoute.Mid(7);
}
defaultRoute.Replace("0.0.0.0/0", "0.0.0.0/1"); // 1st part
// check if source is a Home= IP
RouteEntry entry(defaultRoute);
if (Toolkit::Instance()->IsGKHome(entry.GetDestination())) {
explicitRoutes.AppendString(defaultRoute);
defaultRoute.Replace("0.0.0.0/1", "128.0.0.0/1"); // 2nd part
explicitRoutes.AppendString(defaultRoute);
} else {
PTRACE(1, "Ignoring explicit default route: Invalid source IP " << entry.GetDestination());
}
}
}
int i = (!extroute) ? r_table.GetSize()+1 : r_table.GetSize();
i += explicitRoutes.GetSize();
rtable_end = rtable_begin = static_cast<RouteEntry *>(::malloc(i * sizeof(RouteEntry)));
// prepend explicit routes
for (PINDEX e = 0; e < explicitRoutes.GetSize(); ++e) {
::new (rtable_end++) RouteEntry(explicitRoutes[e]);
}
for (PINDEX r = 0; r < (i - explicitRoutes.GetSize()); ++r) {
if (!extroute && (r==r_table.GetSize())) {
::new (rtable_end++) RouteEntry(extroute);
} else {
PIPSocket::RouteEntry & r_entry = r_table[r];
if (!r_entry.GetNetMask().IsAny()) {
::new (rtable_end++) RouteEntry(r_entry, if_table);
}
}
}
return true;
}
bool Toolkit::VirtualRouteTable::CreateTable()
{
PString nets = GkConfig()->GetString("NetworkInterfaces", "");
if (!nets) {
PStringArray networks(nets.Tokenise(" ,;\t", FALSE));
int i = networks.GetSize();
if (i > 0) {
rtable_end = rtable_begin = static_cast<RouteEntry *>(::malloc(i * sizeof(RouteEntry)));
for (PINDEX r = 0; r < i; ++r) {
::new (rtable_end++) RouteEntry(networks[r]);
}
}
}
// If we have an external IP setting then load the detected Route Table and add a route for the external IP
// If dynamic IP then only store the PString value and resolve the DNS when required.
PString extip = Toolkit::Instance()->GetExternalIP();
if (!extip.IsEmpty()) {
DynExtIP = AsBool(GkConfig()->GetString("ExternalIsDynamic", "0"));
PIPSocket::Address ext((DWORD)0);
H323TransportAddress ex = H323TransportAddress(extip);
ex.GetIpAddress(ext);
if (ext.IsValid()) {
ExtIP = extip;
PString extroute;
if (!DynExtIP)
extroute = ext.AsString() + "/0";
CreateRouteTable(extroute);
PTRACE(1, "External IP=" << ExtIP << " dynamic=" << DynExtIP);
return true;
} else
DynExtIP = false;
}
return false;
}
bool Toolkit::VirtualRouteTable::IsMasquerade(PIPSocket::Address & addr) const
{
if (!ExtIP) {
H323TransportAddress ex = H323TransportAddress(ExtIP);
ex.GetIpAddress(addr);
return true;
}
return false;
}
// class Toolkit::ProxyCriterion
Toolkit::ProxyCriterion::ProxyCriterion() : m_enable(false)
{
}
Toolkit::ProxyCriterion::~ProxyCriterion()
{
}
void Toolkit::ProxyCriterion::LoadConfig(PConfig *config)
{
// read switch for default proxy mode
m_enable = AsBool(config->GetString(ProxySection, "Enable", "0"));
if (!m_enable) {
PTRACE(2, "GK\tH.323 Proxy not enabled by default");
} else {
PTRACE(2, "GK\tH.323 Proxy enabled");
}
m_internalnetworks.clear();
m_modeselection.clear();
PStringArray networks(config->GetString(ProxySection, "InternalNetwork", "").Tokenise(" ,;\t", FALSE));
// if no networks specified then use the detected values
int signalRoutingMode = CallRec::Undefined;
if (RasServer::Instance()->IsGKRouted()) {
if (RasServer::Instance()->IsH245Routed()) {
signalRoutingMode = CallRec::H245Routed;
} else {
signalRoutingMode = CallRec::SignalRouted;
}
}
NetworkModes internal_netmode;
internal_netmode.fromExternal = m_enable ? CallRec::Proxied : signalRoutingMode;
internal_netmode.insideNetwork = signalRoutingMode;
if (networks.GetSize() == 0) {
m_internalnetworks = Toolkit::Instance()->GetInternalNetworks();
for (unsigned j = 0; j < m_internalnetworks.size(); ++j) {
m_modeselection[m_internalnetworks[j]] = internal_netmode;
PTRACE(2, "GK\tInternal Network " << j << " = " << m_internalnetworks[j].AsString()
<< " (" << internal_netmode.fromExternal << "," << internal_netmode.insideNetwork << ")");
}
} else {
m_internalnetworks.clear();
Toolkit::Instance()->GetRouteTable()->ClearInternalNetworks();
for (PINDEX i = 0; i < networks.GetSize(); ++i) {
m_internalnetworks.push_back(networks[i]);
Toolkit::Instance()->GetRouteTable()->AddInternalNetwork(networks[i]);
m_modeselection[networks[i]] = internal_netmode;
PTRACE(2, "GK\tINI Internal Network " << i << " = " << m_internalnetworks[i].AsString()
<< " (" << internal_netmode.fromExternal << "," << internal_netmode.insideNetwork << ")");
}
}
// read [ModeSelection] section
PStringToString mode_rules(config->GetAllKeyValues("ModeSelection"));
if (mode_rules.GetSize() > 0) {
// if we have ModeSelection rules, only use those, don't try to merge them with detected
m_modeselection.clear();
}
for (PINDEX i = 0; i < mode_rules.GetSize(); ++i) {
PString network = mode_rules.GetKeyAt(i);
if (!network.IsEmpty()) {
PStringArray modes((mode_rules.GetDataAt(i)).Tokenise(" ,;\t", FALSE));
if (modes.GetSize() >= 1 && modes.GetSize() <= 2) {
NetworkAddress addr = NetworkAddress(network);
NetworkModes netmode;
netmode.fromExternal = ToRoutingMode(modes[0].Trim());
netmode.insideNetwork = netmode.fromExternal;
if (modes.GetSize() == 2)
netmode.insideNetwork = ToRoutingMode(modes[1].Trim());
// replace 0.0.0.0/0 with 2 rules (0.0.0.0/1 + 128.0.0.0/1), because 0.0.0.0/0 is also treated as invalid network
if (network == "0.0.0.0/0" || network == PCaselessString("default")) {
m_modeselection[NetworkAddress("0.0.0.0/1")] = netmode;
PTRACE(2, "GK\tModeSelection rule: 0.0.0.0/1=" << netmode.fromExternal << "," << netmode.insideNetwork);
m_modeselection[NetworkAddress("128.0.0.0/1")] = netmode;
PTRACE(2, "GK\tModeSelection rule: 128.0.0.0/1=" << netmode.fromExternal << "," << netmode.insideNetwork);
} else {
m_modeselection[addr] = netmode;
PTRACE(2, "GK\tModeSelection rule: " << addr.AsString() << "=" << netmode.fromExternal << "," << netmode.insideNetwork);
}
} else {
PTRACE(1, "GK\tInvalid ModeSelection rule: " << mode_rules.GetKeyAt(i) << "=" << mode_rules.GetDataAt(i) );
}
}
}
}
int Toolkit::ProxyCriterion::ToRoutingMode(const PCaselessString & mode) const
{
if (mode == "Routed")
return CallRec::SignalRouted;
else if (mode == "H245Routed")
return CallRec::H245Routed;
else if (mode == "Proxy")
return CallRec::Proxied;
else
return CallRec::Undefined;
}
// returns network for the rule or IsAny() when no is rule found
NetworkAddress Toolkit::ProxyCriterion::FindModeRule(const NetworkAddress & ip) const
{
NetworkAddress bestmatch;
std::map<NetworkAddress, NetworkModes>::const_iterator iter = m_modeselection.begin();
while (iter != m_modeselection.end()) {
if ((ip << iter->first) && (iter->first.GetNetmaskLen() >= bestmatch.GetNetmaskLen())) {
bestmatch = iter->first;
}
++iter;
}
return bestmatch;
}
int Toolkit::ProxyCriterion::SelectRoutingMode(const Address & ip1, const Address & ip2) const
{
// default mode
int mode = m_enable ? CallRec::Proxied : CallRec::SignalRouted;
if (mode == CallRec::SignalRouted && RasServer::Instance()->IsH245Routed())
mode = CallRec::H245Routed;
PTRACE(5, "ModeSelection for " << ip1.AsString() << " -> " << ip2.AsString() << " default=" << mode);
// check if we have a more specific setting
NetworkAddress bestMatchIP1 = FindModeRule(ip1);
NetworkAddress bestMatchIP2 = FindModeRule(ip2);
std::map<NetworkAddress, NetworkModes>::const_iterator iter;
// check for same network
if (!bestMatchIP1.IsAny() && !bestMatchIP2.IsAny()) {
// rules for both IPs
if (bestMatchIP1.Compare(bestMatchIP2) == 0) {
// both on same network
iter = m_modeselection.find(bestMatchIP1);
if (iter != m_modeselection.end()) {
mode = iter->second.insideNetwork;
PTRACE(5, "ModeSelection: Both IPs on same network: mode=" << mode);
}
} else {
// on different networks, use maximum proxying
iter = m_modeselection.find(bestMatchIP1);
int mode1 = iter->second.fromExternal; // no check, must exist
iter = m_modeselection.find(bestMatchIP2);
int mode2 = iter->second.fromExternal; // no check, must exist
mode = max(mode1, mode2);
PTRACE(5, "ModeSelection: Both IPs on different networks: mode1=" << mode1 << " mode2=" << mode2 << " => " << mode);
}
} else {
// only one rule, use that
if (!bestMatchIP1.IsAny()) {
iter = m_modeselection.find(bestMatchIP1);
if (iter != m_modeselection.end()) {
mode = iter->second.fromExternal;
PTRACE(5, "ModeSelection: Only rule for IP 1 = " << ip1.AsString() << " mode=" << mode);
}
}
if (!bestMatchIP2.IsAny()) {
iter = m_modeselection.find(bestMatchIP2);
if (iter != m_modeselection.end()) {
mode = iter->second.fromExternal;
PTRACE(5, "ModeSelection: Only rule for IP 2 = " << ip2.AsString() << " mode=" << mode);
}
}
}
return mode;
}
int Toolkit::ProxyCriterion::IsInternal(const Address & ip) const
{
// Return the network Id. Addresses may be on different internal networks
int retval = 0;
std::vector<NetworkAddress>::const_iterator i = m_internalnetworks.begin();
while (i != m_internalnetworks.end()) {
retval++;
if (ip << *i++)
return retval;
}
return 0;
}
// class Toolkit::RewriteTool
static const char *RewriteSection = "RasSrv::RewriteE164";
static const char *AliasRewriteSection = "RasSrv::RewriteAlias";
static const char *AssignedAliasSection = "RasSrv::AssignedAlias";
#ifdef h323v6
static const char *AssignedGatekeeperSection = "RasSrv::AssignedGatekeeper";
#endif
static const char *ModeVendorSection = "ModeVendorSelection";
void Toolkit::RewriteData::AddSection(PConfig * config, const PString & section)
{
PStringToString cfgs(config->GetAllKeyValues(section));
PINDEX n_size = cfgs.GetSize();
if (n_size > 0) {
std::map<PString, PString, pstr_prefix_lesser> rules;
for (PINDEX i = 0; i < n_size; ++i) {
PString key = cfgs.GetKeyAt(i);
PCaselessString first = PCaselessString(key[0]);
if (!key && (isdigit(static_cast<unsigned char>(key[0])) || (first.FindOneOf("+!.%*#ABCDEFGHIGKLMNOPQRSTUVWXYZ") != P_MAX_INDEX)))
rules[key] = cfgs.GetDataAt(i);
}
// now the rules are ascendantly sorted by the keys
if ((n_size = rules.size()) > 0) {
// add any existing rules to be resorted
if (m_size > 0) {
for (PINDEX j = 0; j < m_size; ++j) {
rules[Key(j)] = Value(j);
}
}
m_size = m_size + n_size;
// replace array constructor with explicit memory allocation
// and in-place new operators - workaround for VC compiler
m_RewriteKey = (PString*)(new BYTE[sizeof(PString) * m_size * 2]);
m_RewriteValue = m_RewriteKey + m_size;
std::map<PString, PString, pstr_prefix_lesser>::iterator iter = rules.begin();
// reverse the order
for (int i = m_size; i-- > 0; ++iter) {
::new(m_RewriteKey + i) PString(iter->first);
::new(m_RewriteValue + i) PString(iter->second);
}
}
}
}
Toolkit::RewriteData::RewriteData(PConfig *config, const PString & section)
{
m_RewriteKey = NULL;
m_RewriteValue = NULL;
m_size = 0;
AddSection(config, section);
}
Toolkit::RewriteData::~RewriteData()
{
if (m_RewriteKey) {
for (int i = 0; i < m_size * 2; i++) {
(m_RewriteKey+i)->~PString();
}
}
delete[] ((BYTE*)m_RewriteKey);
}
void Toolkit::RewriteTool::LoadConfig(PConfig *config)
{
m_RewriteFastmatch = config->GetString(RewriteSection, "Fastmatch", "");
m_TrailingChar = config->GetString("RasSrv::ARQFeatures", "RemoveTrailingChar", " ")[0];
PString defDomain = config->GetString("Gatekeeper::Main", "DefaultDomain", "");
m_defaultDomain = defDomain.Tokenise(",");
m_externalIP = config->GetString("Gatekeeper::Main", "ExternalIP", "");
delete m_Rewrite;
m_Rewrite = new RewriteData(config, RewriteSection);
m_Rewrite->AddSection(config,AliasRewriteSection);
}
bool Toolkit::RewriteTool::RewritePString(PString & s) const
{
bool changed = false;
// remove trailing character TODO: loop and replace multiple chars ?
if (s.GetLength() > 1 && s[s.GetLength() - 1] == m_TrailingChar) {
s = s.Left(s.GetLength() - 1);
changed = true;
}
// if URL remove the domain if default domain
PINDEX at = s.Find('@');
if (at != P_MAX_INDEX) {
PString num = s.Left(at);
if (num.Left(5) *= "h323:") num = num.Mid(5);
PString domain = s.Mid(at+1);
PIPSocket::Address domIP(domain);
// Check if we have a default domain and strip it
for (PINDEX i = 0; i < m_defaultDomain.GetSize(); i++) {
if (domain == m_defaultDomain[i]) {
PTRACE(2, "\tRewriteDomain (default domain): " << s << " to " << num);
s = num;
changed = true;
break;
}
}
// Check that the domain is not a local IP address.
if (!changed && domIP.IsValid() && Toolkit::Instance()->IsGKHome(domIP)) {
PTRACE(2, "\tRemoveDomain (local IP): " << domain << " to " << num);
s = num;
changed = true;
}
if (!changed && domIP.IsValid() && !m_externalIP.IsEmpty() && domIP.AsString() == m_externalIP) {
PTRACE(2, "\tRemoveDomain (external IP): " << domain << " to " << num);
s = num;
changed = true;
}
}
// startsWith?
if (strncmp(s, m_RewriteFastmatch, m_RewriteFastmatch.GetLength()) != 0)
return changed;
PString t;
for (PINDEX i = 0; i < m_Rewrite->Size(); ++i) {
const char *prefix = m_Rewrite->Key(i);
if (prefix == s){
s = m_Rewrite->Value(i);
return true;
}
const int len = MatchPrefix(s, prefix);
// try a prefix match through all keys