int VBoxNetDhcp::hostDnsServers(const ComHostPtr& host,
const RTNETADDRIPV4& networkid,
const AddressToOffsetMapping& mapping,
AddressList& servers)
{
ComBstrArray strs;
HRESULT hrc = host->COMGETTER(NameServers)(ComSafeArrayAsOutParam(strs));
if (FAILED(hrc))
return VERR_NOT_FOUND;
/*
* Recent fashion is to run dnsmasq on 127.0.1.1 which we
* currently can't map. If that's the only nameserver we've got,
* we need to use DNS proxy for VMs to reach it.
*/
bool fUnmappedLoopback = false;
for (size_t i = 0; i < strs.size(); ++i)
{
RTNETADDRIPV4 addr;
int rc;
rc = RTNetStrToIPv4Addr(com::Utf8Str(strs[i]).c_str(), &addr);
if (RT_FAILURE(rc))
continue;
if (addr.au8[0] == 127)
{
AddressToOffsetMapping::const_iterator remap(mapping.find(addr));
if (remap != mapping.end())
{
int offset = remap->second;
addr.u = RT_H2N_U32(RT_N2H_U32(networkid.u) + offset);
}
else
{
fUnmappedLoopback = true;
continue;
}
}
servers.push_back(addr);
}
if (servers.empty() && fUnmappedLoopback)
{
RTNETADDRIPV4 proxy;
proxy.u = networkid.u | RT_H2N_U32_C(1U);
servers.push_back(proxy);
}
return VINF_SUCCESS;
}
int localMappings(const ComNatPtr& nat, AddressToOffsetMapping& mapping)
{
mapping.clear();
ComBstrArray strs;
size_t cStrs;
HRESULT hrc = nat->COMGETTER(LocalMappings)(ComSafeArrayAsOutParam(strs));
if ( SUCCEEDED(hrc)
&& (cStrs = strs.size()))
{
for (size_t i = 0; i < cStrs; ++i)
{
char szAddr[17];
RTNETADDRIPV4 ip4addr;
char *pszTerm;
uint32_t u32Off;
com::Utf8Str strLo2Off(strs[i]);
const char *pszLo2Off = strLo2Off.c_str();
RT_ZERO(szAddr);
pszTerm = RTStrStr(pszLo2Off, "=");
if ( pszTerm
&& (pszTerm - pszLo2Off) <= INET_ADDRSTRLEN)
{
memcpy(szAddr, pszLo2Off, (pszTerm - pszLo2Off));
int rc = RTNetStrToIPv4Addr(szAddr, &ip4addr);
if (RT_SUCCESS(rc))
{
u32Off = RTStrToUInt32(pszTerm + 1);
if (u32Off != 0)
mapping.insert(
AddressToOffsetMapping::value_type(ip4addr, u32Off));
}
}
}
}
else
return VERR_NOT_FOUND;
return VINF_SUCCESS;
}
/**
* Main thread. Starts also the LWIP thread.
*/
int VBoxNetLwipNAT::init()
{
LogFlowFuncEnter();
/* virtualbox initialized in super class */
int rc = ::VBoxNetBaseService::init();
AssertRCReturn(rc, rc);
std::string networkName = getNetworkName();
rc = findNatNetwork(virtualbox, networkName, m_net);
AssertRCReturn(rc, rc);
ComEventTypeArray aNetEvents;
aNetEvents.push_back(VBoxEventType_OnNATNetworkPortForward);
aNetEvents.push_back(VBoxEventType_OnNATNetworkSetting);
rc = createNatListener(m_listener, virtualbox, this, aNetEvents);
AssertRCReturn(rc, rc);
// resolver changes are reported on vbox but are retrieved from
// host so stash a pointer for future lookups
HRESULT hrc = virtualbox->COMGETTER(Host)(m_host.asOutParam());
AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
ComEventTypeArray aVBoxEvents;
aVBoxEvents.push_back(VBoxEventType_OnHostNameResolutionConfigurationChange);
aVBoxEvents.push_back(VBoxEventType_OnNATNetworkStartStop);
rc = createNatListener(m_vboxListener, virtualbox, this, aVBoxEvents);
AssertRCReturn(rc, rc);
BOOL fIPv6Enabled = FALSE;
hrc = m_net->COMGETTER(IPv6Enabled)(&fIPv6Enabled);
AssertComRCReturn(hrc, VERR_NOT_FOUND);
BOOL fIPv6DefaultRoute = FALSE;
if (fIPv6Enabled)
{
hrc = m_net->COMGETTER(AdvertiseDefaultIPv6RouteEnabled)(&fIPv6DefaultRoute);
AssertComRCReturn(hrc, VERR_NOT_FOUND);
}
m_ProxyOptions.ipv6_enabled = fIPv6Enabled;
m_ProxyOptions.ipv6_defroute = fIPv6DefaultRoute;
com::Bstr bstrSourceIp4Key = com::BstrFmt("NAT/%s/SourceIp4", networkName.c_str());
com::Bstr bstrSourceIpX;
hrc = virtualbox->GetExtraData(bstrSourceIp4Key.raw(), bstrSourceIpX.asOutParam());
if (SUCCEEDED(hrc))
{
RTNETADDRIPV4 addr;
rc = RTNetStrToIPv4Addr(com::Utf8Str(bstrSourceIpX).c_str(), &addr);
if (RT_SUCCESS(rc))
{
RT_ZERO(m_src4);
m_src4.sin_addr.s_addr = addr.u;
m_ProxyOptions.src4 = &m_src4;
bstrSourceIpX.setNull();
}
}
if (!fDontLoadRulesOnStartup)
{
fetchNatPortForwardRules(m_net, false, m_vecPortForwardRule4);
fetchNatPortForwardRules(m_net, true, m_vecPortForwardRule6);
} /* if (!fDontLoadRulesOnStartup) */
AddressToOffsetMapping tmp;
rc = localMappings(m_net, tmp);
if (RT_SUCCESS(rc) && tmp.size() != 0)
{
unsigned long i = 0;
for (AddressToOffsetMapping::iterator it = tmp.begin();
it != tmp.end() && i < RT_ELEMENTS(m_lo2off);
++it, ++i)
{
ip4_addr_set_u32(&m_lo2off[i].loaddr, it->first.u);
m_lo2off[i].off = it->second;
}
m_loOptDescriptor.lomap = m_lo2off;
m_loOptDescriptor.num_lomap = i;
m_ProxyOptions.lomap_desc = &m_loOptDescriptor;
}
com::Bstr bstr;
hrc = virtualbox->COMGETTER(HomeFolder)(bstr.asOutParam());
AssertComRCReturn(hrc, VERR_NOT_FOUND);
if (!bstr.isEmpty())
{
com::Utf8Str strTftpRoot(com::Utf8StrFmt("%ls%c%s",
bstr.raw(), RTPATH_DELIMITER, "TFTP"));
char *pszStrTemp; // avoid const char ** vs char **
rc = RTStrUtf8ToCurrentCP(&pszStrTemp, strTftpRoot.c_str());
AssertRC(rc);
m_ProxyOptions.tftp_root = pszStrTemp;
}
m_ProxyOptions.nameservers = getHostNameservers();
/* end of COM initialization */
rc = g_pLwipNat->tryGoOnline();
if (RT_FAILURE(rc))
return rc;
/* this starts LWIP thread */
vboxLwipCoreInitialize(VBoxNetLwipNAT::onLwipTcpIpInit, this);
LogFlowFuncLeaveRC(rc);
return rc;
}
