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address resolver

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orignal 2016-03-24 14:48:07 -04:00
parent bc5ff37e37
commit 2e5c56205c
2 changed files with 103 additions and 4 deletions
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81
AddressBook.cpp
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@ -330,8 +330,7 @@ namespace client
LoadHostsFromStream (f);
m_IsLoaded = true;
}
// load local
m_Storage->LoadLocal (m_Addresses);
LoadLocal ();
}
void AddressBook::LoadHostsFromStream (std::istream& f)
@ -395,6 +394,40 @@ namespace client
LogPrint (eLogError, "Addressbook: subscriptions already loaded");
}
void AddressBook::LoadLocal ()
{
std::map<std::string, i2p::data::IdentHash> localAddresses;
m_Storage->LoadLocal (localAddresses);
for (auto it: localAddresses)
{
auto dot = it.first.find ('.');
if (dot != std::string::npos)
{
auto domain = it.first.substr (dot + 1);
auto it1 = m_Addresses.find (domain); // find domain in our addressbook
if (it1 != m_Addresses.end ())
{
auto dest = context.FindLocalDestination (it1->second);
if (dest)
{
// address is ours
std::shared_ptr<AddressResolver> resolver;
auto it2 = m_Resolvers.find (it1->second);
if (it2 != m_Resolvers.end ())
resolver = it2->second; // resolver exists
else
{
// create new resolver
resolver = std::make_shared<AddressResolver>(dest);
m_Resolvers.insert (std::make_pair(it1->second, resolver));
}
resolver->AddAddress (it.first, it.second);
}
}
}
}
}
bool AddressBook::GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified)
{
if (m_Storage)
@ -653,6 +686,50 @@ namespace client
m_Book.LoadHostsFromStream (s);
return true;
}
AddressResolver::AddressResolver (std::shared_ptr<ClientDestination> destination):
m_LocalDestination (destination)
{
if (m_LocalDestination)
{
auto datagram = m_LocalDestination->GetDatagramDestination ();
if (!datagram)
datagram = m_LocalDestination->CreateDatagramDestination ();
datagram->SetReceiver (std::bind (&AddressResolver::HandleRequest, this,
std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4, std::placeholders::_5),
ADDRESS_RESOLVER_DATAGRAM_PORT);
}
}
void AddressResolver::HandleRequest (const i2p::data::IdentityEx& from, uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len)
{
if (len < 9 || len < buf[8] + 9U)
{
LogPrint (eLogError, "Address request is too short ", len);
return;
}
// read requested address
uint8_t l = buf[8];
char address[255];
memcpy (address, buf + 9, l);
address[l] = 0;
// send response
uint8_t response[40];
memset (response, 0, 4); // reserved
memcpy (response + 4, buf + 4, 4); // nonce
auto it = m_LocalAddresses.find (address); // address lookup
if (it != m_LocalAddresses.end ())
memcpy (response + 8, it->second, 32); // ident
else
memset (response + 8, 0, 32); // not found
m_LocalDestination->GetDatagramDestination ()->SendDatagramTo (response, 40, from.GetIdentHash (), toPort, fromPort);
}
void AddressResolver::AddAddress (const std::string& name, const i2p::data::IdentHash& ident)
{
m_LocalAddresses[name] = ident;
}
}
}