mirror of
https://github.com/PurpleI2P/i2pd.git
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978 lines
30 KiB
C++
978 lines
30 KiB
C++
/*
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* Copyright (c) 2013-2020, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#include <string.h>
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#include <inttypes.h>
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#include <string>
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#include <map>
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#include <fstream>
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#include <chrono>
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#include <condition_variable>
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#include <openssl/rand.h>
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#include <boost/algorithm/string.hpp>
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#include <boost/filesystem.hpp>
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#include "Base.h"
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#include "util.h"
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#include "Identity.h"
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#include "FS.h"
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#include "Log.h"
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#include "HTTP.h"
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#include "NetDb.hpp"
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#include "ClientContext.h"
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#include "AddressBook.h"
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#include "Config.h"
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namespace i2p
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{
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namespace client
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{
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// TODO: this is actually proxy class
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class AddressBookFilesystemStorage: public AddressBookStorage
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{
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private:
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i2p::fs::HashedStorage storage;
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std::string etagsPath, indexPath, localPath;
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public:
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AddressBookFilesystemStorage (): storage("addressbook", "b", "", "b32")
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{
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i2p::config::GetOption("persist.addressbook", m_IsPersist);
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}
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std::shared_ptr<const i2p::data::IdentityEx> GetAddress (const i2p::data::IdentHash& ident) const;
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void AddAddress (std::shared_ptr<const i2p::data::IdentityEx> address);
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void RemoveAddress (const i2p::data::IdentHash& ident);
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bool Init ();
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int Load (std::map<std::string, std::shared_ptr<Address> > & addresses);
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int LoadLocal (std::map<std::string, std::shared_ptr<Address> >& addresses);
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int Save (const std::map<std::string, std::shared_ptr<Address> >& addresses);
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void SaveEtag (const i2p::data::IdentHash& subsciption, const std::string& etag, const std::string& lastModified);
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bool GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified);
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void ResetEtags ();
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private:
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int LoadFromFile (const std::string& filename, std::map<std::string, std::shared_ptr<Address> >& addresses); // returns -1 if can't open file, otherwise number of records
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private:
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bool m_IsPersist;
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};
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bool AddressBookFilesystemStorage::Init()
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{
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storage.SetPlace(i2p::fs::GetDataDir());
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// init storage
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if (storage.Init(i2p::data::GetBase32SubstitutionTable(), 32))
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{
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// init ETags
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etagsPath = i2p::fs::StorageRootPath (storage, "etags");
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if (!i2p::fs::Exists (etagsPath))
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i2p::fs::CreateDirectory (etagsPath);
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// init address files
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indexPath = i2p::fs::StorageRootPath (storage, "addresses.csv");
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localPath = i2p::fs::StorageRootPath (storage, "local.csv");
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return true;
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}
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return false;
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}
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std::shared_ptr<const i2p::data::IdentityEx> AddressBookFilesystemStorage::GetAddress (const i2p::data::IdentHash& ident) const
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{
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if (!m_IsPersist)
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{
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LogPrint(eLogDebug, "Addressbook: Persistence is disabled");
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return nullptr;
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}
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std::string filename = storage.Path(ident.ToBase32());
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std::ifstream f(filename, std::ifstream::binary);
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if (!f.is_open ()) {
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LogPrint(eLogDebug, "Addressbook: Requested, but not found: ", filename);
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return nullptr;
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}
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f.seekg (0,std::ios::end);
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size_t len = f.tellg ();
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if (len < i2p::data::DEFAULT_IDENTITY_SIZE) {
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LogPrint (eLogError, "Addressbook: File ", filename, " is too short: ", len);
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return nullptr;
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}
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f.seekg(0, std::ios::beg);
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uint8_t * buf = new uint8_t[len];
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f.read((char *)buf, len);
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auto address = std::make_shared<i2p::data::IdentityEx>(buf, len);
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delete[] buf;
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return address;
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}
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void AddressBookFilesystemStorage::AddAddress (std::shared_ptr<const i2p::data::IdentityEx> address)
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{
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if (!m_IsPersist) return;
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std::string path = storage.Path( address->GetIdentHash().ToBase32() );
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std::ofstream f (path, std::ofstream::binary | std::ofstream::out);
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if (!f.is_open ()) {
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LogPrint (eLogError, "Addressbook: can't open file ", path);
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return;
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}
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size_t len = address->GetFullLen ();
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uint8_t * buf = new uint8_t[len];
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address->ToBuffer (buf, len);
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f.write ((char *)buf, len);
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delete[] buf;
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}
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void AddressBookFilesystemStorage::RemoveAddress (const i2p::data::IdentHash& ident)
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{
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if (!m_IsPersist) return;
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storage.Remove( ident.ToBase32() );
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}
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int AddressBookFilesystemStorage::LoadFromFile (const std::string& filename, std::map<std::string, std::shared_ptr<Address> >& addresses)
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{
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int num = 0;
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std::ifstream f (filename, std::ifstream::in); // in text mode
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if (!f) return -1;
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addresses.clear ();
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while (!f.eof ())
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{
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std::string s;
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getline(f, s);
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if (!s.length()) continue; // skip empty line
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std::size_t pos = s.find(',');
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if (pos != std::string::npos)
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{
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std::string name = s.substr(0, pos++);
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std::string addr = s.substr(pos);
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addresses[name] = std::make_shared<Address>(addr);
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num++;
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}
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}
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return num;
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}
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int AddressBookFilesystemStorage::Load (std::map<std::string, std::shared_ptr<Address> >& addresses)
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{
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int num = LoadFromFile (indexPath, addresses);
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if (num < 0)
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{
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LogPrint(eLogWarning, "Addressbook: Can't open ", indexPath);
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return 0;
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}
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LogPrint(eLogInfo, "Addressbook: using index file ", indexPath);
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LogPrint (eLogInfo, "Addressbook: ", num, " addresses loaded from storage");
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return num;
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}
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int AddressBookFilesystemStorage::LoadLocal (std::map<std::string, std::shared_ptr<Address> >& addresses)
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{
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int num = LoadFromFile (localPath, addresses);
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if (num < 0) return 0;
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LogPrint (eLogInfo, "Addressbook: ", num, " local addresses loaded");
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return num;
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}
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int AddressBookFilesystemStorage::Save (const std::map<std::string, std::shared_ptr<Address> >& addresses)
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{
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if (addresses.empty()) {
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LogPrint(eLogWarning, "Addressbook: not saving empty addressbook");
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return 0;
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}
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int num = 0;
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std::ofstream f (indexPath, std::ofstream::out); // in text mode
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if (!f.is_open ()) {
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LogPrint (eLogWarning, "Addressbook: Can't open ", indexPath);
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return 0;
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}
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for (const auto& it: addresses)
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{
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if (it.second->IsValid ())
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{
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f << it.first << ",";
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if (it.second->IsIdentHash ())
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f << it.second->identHash.ToBase32 ();
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else
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f << it.second->blindedPublicKey->ToB33 ();
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f << std::endl;
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num++;
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}
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else
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LogPrint (eLogWarning, "Addressbook: invalid address ", it.first);
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}
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LogPrint (eLogInfo, "Addressbook: ", num, " addresses saved");
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return num;
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}
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void AddressBookFilesystemStorage::SaveEtag (const i2p::data::IdentHash& subscription, const std::string& etag, const std::string& lastModified)
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{
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std::string fname = etagsPath + i2p::fs::dirSep + subscription.ToBase32 () + ".txt";
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std::ofstream f (fname, std::ofstream::out | std::ofstream::trunc);
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if (f)
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{
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f << etag << std::endl;
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f<< lastModified << std::endl;
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}
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}
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bool AddressBookFilesystemStorage::GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified)
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{
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std::string fname = etagsPath + i2p::fs::dirSep + subscription.ToBase32 () + ".txt";
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std::ifstream f (fname, std::ofstream::in);
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if (!f || f.eof ()) return false;
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std::getline (f, etag);
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if (f.eof ()) return false;
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std::getline (f, lastModified);
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return true;
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}
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void AddressBookFilesystemStorage::ResetEtags ()
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{
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LogPrint (eLogError, "Addressbook: resetting eTags");
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for (boost::filesystem::directory_iterator it (etagsPath); it != boost::filesystem::directory_iterator (); ++it)
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{
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if (!boost::filesystem::is_regular_file (it->status ()))
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continue;
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boost::filesystem::remove (it->path ());
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}
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}
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//---------------------------------------------------------------------
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Address::Address (const std::string& b32):
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addressType (eAddressInvalid)
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{
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if (b32.length () <= B33_ADDRESS_THRESHOLD)
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{
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if (identHash.FromBase32 (b32) > 0)
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addressType = eAddressIndentHash;
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}
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else
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{
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blindedPublicKey = std::make_shared<i2p::data::BlindedPublicKey>(b32);
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if (blindedPublicKey->IsValid ())
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addressType = eAddressBlindedPublicKey;
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}
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}
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Address::Address (const i2p::data::IdentHash& hash)
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{
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addressType = eAddressIndentHash;
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identHash = hash;
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}
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AddressBook::AddressBook (): m_Storage(nullptr), m_IsLoaded (false), m_IsDownloading (false),
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m_NumRetries (0), m_DefaultSubscription (nullptr), m_SubscriptionsUpdateTimer (nullptr)
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{
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}
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AddressBook::~AddressBook ()
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{
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Stop ();
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}
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void AddressBook::Start ()
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{
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if (!m_Storage)
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m_Storage = new AddressBookFilesystemStorage;
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m_Storage->Init();
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LoadHosts (); /* try storage, then hosts.txt, then download */
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StartSubscriptions ();
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StartLookups ();
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}
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void AddressBook::StartResolvers ()
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{
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LoadLocal ();
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}
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void AddressBook::Stop ()
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{
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StopLookups ();
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StopSubscriptions ();
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if (m_SubscriptionsUpdateTimer)
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{
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delete m_SubscriptionsUpdateTimer;
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m_SubscriptionsUpdateTimer = nullptr;
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}
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if (m_IsDownloading)
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{
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LogPrint (eLogInfo, "Addressbook: subscriptions are downloading, abort");
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for (int i = 0; i < 30; i++)
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{
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if (!m_IsDownloading)
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{
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LogPrint (eLogInfo, "Addressbook: subscriptions download complete");
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break;
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}
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std::this_thread::sleep_for (std::chrono::seconds (1)); // wait for 1 seconds
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}
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LogPrint (eLogError, "Addressbook: subscription download timeout");
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m_IsDownloading = false;
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}
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if (m_Storage)
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{
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m_Storage->Save (m_Addresses);
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delete m_Storage;
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m_Storage = nullptr;
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}
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m_DefaultSubscription = nullptr;
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m_Subscriptions.clear ();
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}
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std::shared_ptr<const Address> AddressBook::GetAddress (const std::string& address)
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{
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auto pos = address.find(".b32.i2p");
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if (pos != std::string::npos)
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{
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auto addr = std::make_shared<const Address>(address.substr (0, pos));
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return addr->IsValid () ? addr : nullptr;
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}
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else
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{
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pos = address.find (".i2p");
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if (pos != std::string::npos)
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{
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auto addr = FindAddress (address);
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if (!addr)
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LookupAddress (address); // TODO:
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return addr;
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}
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}
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// if not .b32 we assume full base64 address
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i2p::data::IdentityEx dest;
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if (!dest.FromBase64 (address))
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return nullptr;
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return std::make_shared<const Address>(dest.GetIdentHash ());
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}
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std::shared_ptr<const Address> AddressBook::FindAddress (const std::string& address)
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{
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auto it = m_Addresses.find (address);
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if (it != m_Addresses.end ())
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return it->second;
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return nullptr;
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}
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void AddressBook::InsertAddress (const std::string& address, const std::string& jump)
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{
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auto pos = jump.find(".b32.i2p");
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if (pos != std::string::npos)
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{
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m_Addresses[address] = std::make_shared<Address>(jump.substr (0, pos));
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LogPrint (eLogInfo, "Addressbook: added ", address," -> ", jump);
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}
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else
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{
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// assume base64
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auto ident = std::make_shared<i2p::data::IdentityEx>();
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if (ident->FromBase64 (jump))
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{
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m_Storage->AddAddress (ident);
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m_Addresses[address] = std::make_shared<Address>(ident->GetIdentHash ());
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LogPrint (eLogInfo, "Addressbook: added ", address," -> ", ToAddress(ident->GetIdentHash ()));
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}
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else
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LogPrint (eLogError, "Addressbook: malformed address ", jump);
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}
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}
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void AddressBook::InsertFullAddress (std::shared_ptr<const i2p::data::IdentityEx> address)
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{
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m_Storage->AddAddress (address);
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}
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std::shared_ptr<const i2p::data::IdentityEx> AddressBook::GetFullAddress (const std::string& address)
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{
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auto addr = GetAddress (address);
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if (!addr || !addr->IsIdentHash ()) return nullptr;
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return m_Storage->GetAddress (addr->identHash);
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}
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void AddressBook::LoadHosts ()
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{
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if (m_Storage->Load (m_Addresses) > 0)
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{
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m_IsLoaded = true;
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return;
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}
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// then try hosts.txt
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std::ifstream f (i2p::fs::DataDirPath("hosts.txt"), std::ifstream::in); // in text mode
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if (f.is_open ())
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{
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LoadHostsFromStream (f, false);
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m_IsLoaded = true;
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}
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// reset eTags, because we don’t know how old hosts.txt is or can't load addressbook
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m_Storage->ResetEtags ();
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}
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bool AddressBook::LoadHostsFromStream (std::istream& f, bool is_update)
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{
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std::unique_lock<std::mutex> l(m_AddressBookMutex);
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int numAddresses = 0;
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bool incomplete = false;
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std::string s;
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while (!f.eof ())
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{
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getline(f, s);
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if (!s.length() || s[0] == '#')
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continue; // skip empty or comment line
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size_t pos = s.find('=');
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if (pos != std::string::npos)
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{
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std::string name = s.substr(0, pos++);
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std::string addr = s.substr(pos);
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size_t pos = addr.find('#');
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if (pos != std::string::npos)
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addr = addr.substr(0, pos); // remove comments
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auto ident = std::make_shared<i2p::data::IdentityEx> ();
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if (!ident->FromBase64(addr)) {
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LogPrint (eLogError, "Addressbook: malformed address ", addr, " for ", name);
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incomplete = f.eof ();
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continue;
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}
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numAddresses++;
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auto it = m_Addresses.find (name);
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if (it != m_Addresses.end ()) // already exists ?
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{
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if (it->second->IsIdentHash () && it->second->identHash != ident->GetIdentHash () && // address changed?
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ident->GetSigningKeyType () != i2p::data::SIGNING_KEY_TYPE_DSA_SHA1) // don't replace by DSA
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{
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it->second->identHash = ident->GetIdentHash ();
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m_Storage->AddAddress (ident);
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m_Storage->RemoveAddress (it->second->identHash);
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LogPrint (eLogInfo, "Addressbook: updated host: ", name);
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}
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}
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else
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{
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m_Addresses.emplace (name, std::make_shared<Address>(ident->GetIdentHash ()));
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m_Storage->AddAddress (ident);
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if (is_update)
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LogPrint (eLogInfo, "Addressbook: added new host: ", name);
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}
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}
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else
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incomplete = f.eof ();
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}
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LogPrint (eLogInfo, "Addressbook: ", numAddresses, " addresses processed");
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if (numAddresses > 0)
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{
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if (!incomplete) m_IsLoaded = true;
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m_Storage->Save (m_Addresses);
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}
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return !incomplete;
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}
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void AddressBook::LoadSubscriptions ()
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{
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if (!m_Subscriptions.size ())
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{
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std::ifstream f (i2p::fs::DataDirPath ("subscriptions.txt"), std::ifstream::in); // in text mode
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if (f.is_open ())
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{
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std::string s;
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while (!f.eof ())
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{
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getline(f, s);
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if (!s.length()) continue; // skip empty line
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m_Subscriptions.push_back (std::make_shared<AddressBookSubscription> (*this, s));
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}
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LogPrint (eLogInfo, "Addressbook: ", m_Subscriptions.size (), " subscriptions urls loaded");
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LogPrint (eLogWarning, "Addressbook: subscriptions.txt usage is deprecated, use config file instead");
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}
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else if (!i2p::config::IsDefault("addressbook.subscriptions"))
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{
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// using config file items
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std::string subscriptionURLs; i2p::config::GetOption("addressbook.subscriptions", subscriptionURLs);
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std::vector<std::string> subsList;
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boost::split(subsList, subscriptionURLs, boost::is_any_of(","), boost::token_compress_on);
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for (size_t i = 0; i < subsList.size (); i++)
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{
|
||
m_Subscriptions.push_back (std::make_shared<AddressBookSubscription> (*this, subsList[i]));
|
||
}
|
||
LogPrint (eLogInfo, "Addressbook: ", m_Subscriptions.size (), " subscriptions urls loaded");
|
||
}
|
||
}
|
||
else
|
||
LogPrint (eLogError, "Addressbook: subscriptions already loaded");
|
||
}
|
||
|
||
void AddressBook::LoadLocal ()
|
||
{
|
||
std::map<std::string, std::shared_ptr<Address>> localAddresses;
|
||
m_Storage->LoadLocal (localAddresses);
|
||
for (const auto& it: localAddresses)
|
||
{
|
||
if (!it.second->IsIdentHash ()) continue; // skip blinded for now
|
||
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 () && it1->second->IsIdentHash ())
|
||
{
|
||
auto dest = context.FindLocalDestination (it1->second->identHash);
|
||
if (dest)
|
||
{
|
||
// address is ours
|
||
std::shared_ptr<AddressResolver> resolver;
|
||
auto it2 = m_Resolvers.find (it1->second->identHash);
|
||
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->identHash, resolver));
|
||
}
|
||
resolver->AddAddress (it.first, it.second->identHash);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
bool AddressBook::GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified)
|
||
{
|
||
if (m_Storage)
|
||
return m_Storage->GetEtag (subscription, etag, lastModified);
|
||
else
|
||
return false;
|
||
}
|
||
|
||
void AddressBook::DownloadComplete (bool success, const i2p::data::IdentHash& subscription, const std::string& etag, const std::string& lastModified)
|
||
{
|
||
m_IsDownloading = false;
|
||
m_NumRetries++;
|
||
int nextUpdateTimeout = m_NumRetries*CONTINIOUS_SUBSCRIPTION_RETRY_TIMEOUT;
|
||
if (m_NumRetries > CONTINIOUS_SUBSCRIPTION_MAX_NUM_RETRIES || nextUpdateTimeout > CONTINIOUS_SUBSCRIPTION_UPDATE_TIMEOUT)
|
||
nextUpdateTimeout = CONTINIOUS_SUBSCRIPTION_UPDATE_TIMEOUT;
|
||
if (success)
|
||
{
|
||
m_NumRetries = 0;
|
||
if (m_DefaultSubscription) m_DefaultSubscription = nullptr;
|
||
if (m_IsLoaded)
|
||
nextUpdateTimeout = CONTINIOUS_SUBSCRIPTION_UPDATE_TIMEOUT;
|
||
else
|
||
m_IsLoaded = true;
|
||
if (m_Storage) m_Storage->SaveEtag (subscription, etag, lastModified);
|
||
}
|
||
if (m_SubscriptionsUpdateTimer)
|
||
{
|
||
m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(nextUpdateTimeout));
|
||
m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer,
|
||
this, std::placeholders::_1));
|
||
}
|
||
}
|
||
|
||
void AddressBook::StartSubscriptions ()
|
||
{
|
||
LoadSubscriptions ();
|
||
if (m_IsLoaded && m_Subscriptions.empty ()) return;
|
||
|
||
auto dest = i2p::client::context.GetSharedLocalDestination ();
|
||
if (dest)
|
||
{
|
||
m_SubscriptionsUpdateTimer = new boost::asio::deadline_timer (dest->GetService ());
|
||
m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(INITIAL_SUBSCRIPTION_UPDATE_TIMEOUT));
|
||
m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer,
|
||
this, std::placeholders::_1));
|
||
}
|
||
else
|
||
LogPrint (eLogError, "Addressbook: can't start subscriptions: missing shared local destination");
|
||
}
|
||
|
||
void AddressBook::StopSubscriptions ()
|
||
{
|
||
if (m_SubscriptionsUpdateTimer)
|
||
m_SubscriptionsUpdateTimer->cancel ();
|
||
}
|
||
|
||
void AddressBook::HandleSubscriptionsUpdateTimer (const boost::system::error_code& ecode)
|
||
{
|
||
if (ecode != boost::asio::error::operation_aborted)
|
||
{
|
||
auto dest = i2p::client::context.GetSharedLocalDestination ();
|
||
if (!dest) {
|
||
LogPrint(eLogWarning, "Addressbook: missing local destination, skip subscription update");
|
||
return;
|
||
}
|
||
if (!m_IsDownloading && dest->IsReady ())
|
||
{
|
||
if (!m_IsLoaded)
|
||
{
|
||
// download it from default subscription
|
||
LogPrint (eLogInfo, "Addressbook: trying to download it from default subscription.");
|
||
std::string defaultSubURL; i2p::config::GetOption("addressbook.defaulturl", defaultSubURL);
|
||
if (!m_DefaultSubscription)
|
||
m_DefaultSubscription = std::make_shared<AddressBookSubscription>(*this, defaultSubURL);
|
||
m_IsDownloading = true;
|
||
std::thread load_hosts(std::bind (&AddressBookSubscription::CheckUpdates, m_DefaultSubscription));
|
||
load_hosts.detach(); // TODO: use join
|
||
}
|
||
else if (!m_Subscriptions.empty ())
|
||
{
|
||
// pick random subscription
|
||
auto ind = rand () % m_Subscriptions.size();
|
||
m_IsDownloading = true;
|
||
std::thread load_hosts(std::bind (&AddressBookSubscription::CheckUpdates, m_Subscriptions[ind]));
|
||
load_hosts.detach(); // TODO: use join
|
||
}
|
||
}
|
||
else
|
||
{
|
||
// try it again later
|
||
m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(INITIAL_SUBSCRIPTION_RETRY_TIMEOUT));
|
||
m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer,
|
||
this, std::placeholders::_1));
|
||
}
|
||
}
|
||
}
|
||
|
||
void AddressBook::StartLookups ()
|
||
{
|
||
auto dest = i2p::client::context.GetSharedLocalDestination ();
|
||
if (dest)
|
||
{
|
||
auto datagram = dest->GetDatagramDestination ();
|
||
if (!datagram)
|
||
datagram = dest->CreateDatagramDestination ();
|
||
datagram->SetReceiver (std::bind (&AddressBook::HandleLookupResponse, this,
|
||
std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4, std::placeholders::_5),
|
||
ADDRESS_RESPONSE_DATAGRAM_PORT);
|
||
}
|
||
}
|
||
|
||
void AddressBook::StopLookups ()
|
||
{
|
||
auto dest = i2p::client::context.GetSharedLocalDestination ();
|
||
if (dest)
|
||
{
|
||
auto datagram = dest->GetDatagramDestination ();
|
||
if (datagram) datagram->ResetReceiver (ADDRESS_RESPONSE_DATAGRAM_PORT);
|
||
}
|
||
}
|
||
|
||
void AddressBook::LookupAddress (const std::string& address)
|
||
{
|
||
std::shared_ptr<const Address> addr;
|
||
auto dot = address.find ('.');
|
||
if (dot != std::string::npos)
|
||
addr = FindAddress (address.substr (dot + 1));
|
||
if (!addr || !addr->IsIdentHash ()) // TODO:
|
||
{
|
||
LogPrint (eLogError, "Addressbook: Can't find domain for ", address);
|
||
return;
|
||
}
|
||
|
||
auto dest = i2p::client::context.GetSharedLocalDestination ();
|
||
if (dest)
|
||
{
|
||
auto datagram = dest->GetDatagramDestination ();
|
||
if (datagram)
|
||
{
|
||
uint32_t nonce;
|
||
RAND_bytes ((uint8_t *)&nonce, 4);
|
||
{
|
||
std::unique_lock<std::mutex> l(m_LookupsMutex);
|
||
m_Lookups[nonce] = address;
|
||
}
|
||
LogPrint (eLogDebug, "Addressbook: Lookup of ", address, " to ", addr->identHash.ToBase32 (), " nonce=", nonce);
|
||
size_t len = address.length () + 9;
|
||
uint8_t * buf = new uint8_t[len];
|
||
memset (buf, 0, 4);
|
||
htobe32buf (buf + 4, nonce);
|
||
buf[8] = address.length ();
|
||
memcpy (buf + 9, address.c_str (), address.length ());
|
||
datagram->SendDatagramTo (buf, len, addr->identHash, ADDRESS_RESPONSE_DATAGRAM_PORT, ADDRESS_RESOLVER_DATAGRAM_PORT);
|
||
delete[] buf;
|
||
}
|
||
}
|
||
}
|
||
|
||
void AddressBook::HandleLookupResponse (const i2p::data::IdentityEx& from, uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len)
|
||
{
|
||
if (len < 44)
|
||
{
|
||
LogPrint (eLogError, "Addressbook: Lookup response is too short ", len);
|
||
return;
|
||
}
|
||
uint32_t nonce = bufbe32toh (buf + 4);
|
||
LogPrint (eLogDebug, "Addressbook: Lookup response received from ", from.GetIdentHash ().ToBase32 (), " nonce=", nonce);
|
||
std::string address;
|
||
{
|
||
std::unique_lock<std::mutex> l(m_LookupsMutex);
|
||
auto it = m_Lookups.find (nonce);
|
||
if (it != m_Lookups.end ())
|
||
{
|
||
address = it->second;
|
||
m_Lookups.erase (it);
|
||
}
|
||
}
|
||
if (address.length () > 0)
|
||
{
|
||
// TODO: verify from
|
||
i2p::data::IdentHash hash(buf + 8);
|
||
if (!hash.IsZero ())
|
||
m_Addresses[address] = std::make_shared<Address>(hash);
|
||
else
|
||
LogPrint (eLogInfo, "AddressBook: Lookup response: ", address, " not found");
|
||
}
|
||
}
|
||
|
||
AddressBookSubscription::AddressBookSubscription (AddressBook& book, const std::string& link):
|
||
m_Book (book), m_Link (link)
|
||
{
|
||
}
|
||
|
||
void AddressBookSubscription::CheckUpdates ()
|
||
{
|
||
i2p::util::SetThreadName("Addressbook");
|
||
|
||
bool result = MakeRequest ();
|
||
m_Book.DownloadComplete (result, m_Ident, m_Etag, m_LastModified);
|
||
}
|
||
|
||
bool AddressBookSubscription::MakeRequest ()
|
||
{
|
||
i2p::http::URL url;
|
||
// must be run in separate thread
|
||
LogPrint (eLogInfo, "Addressbook: Downloading hosts database from ", m_Link);
|
||
if (!url.parse(m_Link))
|
||
{
|
||
LogPrint(eLogError, "Addressbook: failed to parse url: ", m_Link);
|
||
return false;
|
||
}
|
||
auto addr = m_Book.GetAddress (url.host);
|
||
if (!addr || !addr->IsIdentHash ())
|
||
{
|
||
LogPrint (eLogError, "Addressbook: Can't resolve ", url.host);
|
||
return false;
|
||
}
|
||
else
|
||
m_Ident = addr->identHash;
|
||
/* this code block still needs some love */
|
||
std::condition_variable newDataReceived;
|
||
std::mutex newDataReceivedMutex;
|
||
auto leaseSet = i2p::client::context.GetSharedLocalDestination ()->FindLeaseSet (m_Ident);
|
||
if (!leaseSet)
|
||
{
|
||
std::unique_lock<std::mutex> l(newDataReceivedMutex);
|
||
i2p::client::context.GetSharedLocalDestination ()->RequestDestination (m_Ident,
|
||
[&newDataReceived, &leaseSet, &newDataReceivedMutex](std::shared_ptr<i2p::data::LeaseSet> ls)
|
||
{
|
||
leaseSet = ls;
|
||
std::unique_lock<std::mutex> l1(newDataReceivedMutex);
|
||
newDataReceived.notify_all ();
|
||
});
|
||
if (newDataReceived.wait_for (l, std::chrono::seconds (SUBSCRIPTION_REQUEST_TIMEOUT)) == std::cv_status::timeout)
|
||
{
|
||
LogPrint (eLogError, "Addressbook: Subscription LeaseSet request timeout expired");
|
||
i2p::client::context.GetSharedLocalDestination ()->CancelDestinationRequest (m_Ident, false); // don't notify, because we know it already
|
||
return false;
|
||
}
|
||
}
|
||
if (!leaseSet) {
|
||
/* still no leaseset found */
|
||
LogPrint (eLogError, "Addressbook: LeaseSet for address ", url.host, " not found");
|
||
return false;
|
||
}
|
||
if (m_Etag.empty() && m_LastModified.empty()) {
|
||
m_Book.GetEtag (m_Ident, m_Etag, m_LastModified);
|
||
LogPrint (eLogDebug, "Addressbook: loaded for ", url.host, ": ETag: ", m_Etag, ", Last-Modified: ", m_LastModified);
|
||
}
|
||
/* save url parts for later use */
|
||
std::string dest_host = url.host;
|
||
int dest_port = url.port ? url.port : 80;
|
||
/* create http request & send it */
|
||
i2p::http::HTTPReq req;
|
||
req.AddHeader("Host", dest_host);
|
||
req.AddHeader("User-Agent", "Wget/1.11.4");
|
||
req.AddHeader("Accept-Encoding", "gzip");
|
||
req.AddHeader("X-Accept-Encoding", "x-i2p-gzip;q=1.0, identity;q=0.5, deflate;q=0, gzip;q=0, *;q=0");
|
||
req.AddHeader("Connection", "close");
|
||
if (!m_Etag.empty())
|
||
req.AddHeader("If-None-Match", m_Etag);
|
||
if (!m_LastModified.empty())
|
||
req.AddHeader("If-Modified-Since", m_LastModified);
|
||
/* convert url to relative */
|
||
url.schema = "";
|
||
url.host = "";
|
||
req.uri = url.to_string();
|
||
req.version = "HTTP/1.1";
|
||
auto stream = i2p::client::context.GetSharedLocalDestination ()->CreateStream (leaseSet, dest_port);
|
||
std::string request = req.to_string();
|
||
stream->Send ((const uint8_t *) request.data(), request.length());
|
||
/* read response */
|
||
std::string response;
|
||
uint8_t recv_buf[4096];
|
||
bool end = false;
|
||
int numAttempts = 0;
|
||
while (!end)
|
||
{
|
||
stream->AsyncReceive (boost::asio::buffer (recv_buf, 4096),
|
||
[&](const boost::system::error_code& ecode, std::size_t bytes_transferred)
|
||
{
|
||
if (bytes_transferred)
|
||
response.append ((char *)recv_buf, bytes_transferred);
|
||
if (ecode == boost::asio::error::timed_out || !stream->IsOpen ())
|
||
end = true;
|
||
newDataReceived.notify_all ();
|
||
},
|
||
SUBSCRIPTION_REQUEST_TIMEOUT);
|
||
std::unique_lock<std::mutex> l(newDataReceivedMutex);
|
||
// wait 1 more second
|
||
if (newDataReceived.wait_for (l, std::chrono::seconds (SUBSCRIPTION_REQUEST_TIMEOUT + 1)) == std::cv_status::timeout)
|
||
{
|
||
LogPrint (eLogError, "Addressbook: subscriptions request timeout expired");
|
||
numAttempts++;
|
||
if (numAttempts > 5) end = true;
|
||
}
|
||
}
|
||
// process remaining buffer
|
||
while (size_t len = stream->ReadSome (recv_buf, sizeof(recv_buf)))
|
||
response.append ((char *)recv_buf, len);
|
||
/* parse response */
|
||
i2p::http::HTTPRes res;
|
||
int res_head_len = res.parse(response);
|
||
if (res_head_len < 0)
|
||
{
|
||
LogPrint(eLogError, "Addressbook: can't parse http response from ", dest_host);
|
||
return false;
|
||
}
|
||
if (res_head_len == 0)
|
||
{
|
||
LogPrint(eLogError, "Addressbook: incomplete http response from ", dest_host, ", interrupted by timeout");
|
||
return false;
|
||
}
|
||
/* assert: res_head_len > 0 */
|
||
response.erase(0, res_head_len);
|
||
if (res.code == 304)
|
||
{
|
||
LogPrint (eLogInfo, "Addressbook: no updates from ", dest_host, ", code 304");
|
||
return false;
|
||
}
|
||
if (res.code != 200)
|
||
{
|
||
LogPrint (eLogWarning, "Adressbook: can't get updates from ", dest_host, ", response code ", res.code);
|
||
return false;
|
||
}
|
||
int len = res.content_length();
|
||
if (response.empty())
|
||
{
|
||
LogPrint(eLogError, "Addressbook: empty response from ", dest_host, ", expected ", len, " bytes");
|
||
return false;
|
||
}
|
||
if (!res.is_gzipped () && len > 0 && len != (int) response.length())
|
||
{
|
||
LogPrint(eLogError, "Addressbook: response size mismatch, expected: ", len, ", got: ", response.length(), "bytes");
|
||
return false;
|
||
}
|
||
/* assert: res.code == 200 */
|
||
auto it = res.headers.find("ETag");
|
||
if (it != res.headers.end()) m_Etag = it->second;
|
||
it = res.headers.find("Last-Modified");
|
||
if (it != res.headers.end()) m_LastModified = it->second;
|
||
if (res.is_chunked())
|
||
{
|
||
std::stringstream in(response), out;
|
||
i2p::http::MergeChunkedResponse (in, out);
|
||
response = out.str();
|
||
}
|
||
if (res.is_gzipped())
|
||
{
|
||
std::stringstream out;
|
||
i2p::data::GzipInflator inflator;
|
||
inflator.Inflate ((const uint8_t *) response.data(), response.length(), out);
|
||
if (out.fail())
|
||
{
|
||
LogPrint(eLogError, "Addressbook: can't gunzip http response");
|
||
return false;
|
||
}
|
||
response = out.str();
|
||
}
|
||
std::stringstream ss(response);
|
||
LogPrint (eLogInfo, "Addressbook: got update from ", dest_host);
|
||
m_Book.LoadHostsFromStream (ss, true);
|
||
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);
|
||
}
|
||
}
|
||
|
||
AddressResolver::~AddressResolver ()
|
||
{
|
||
if (m_LocalDestination)
|
||
{
|
||
auto datagram = m_LocalDestination->GetDatagramDestination ();
|
||
if (datagram)
|
||
datagram->ResetReceiver (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, "Addressbook: 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;
|
||
LogPrint (eLogDebug, "Addressbook: Address request ", address);
|
||
// send response
|
||
uint8_t response[44];
|
||
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
|
||
memset (response + 40, 0, 4); // set expiration time to zero
|
||
m_LocalDestination->GetDatagramDestination ()->SendDatagramTo (response, 44, from.GetIdentHash(), toPort, fromPort);
|
||
}
|
||
|
||
void AddressResolver::AddAddress (const std::string& name, const i2p::data::IdentHash& ident)
|
||
{
|
||
m_LocalAddresses[name] = ident;
|
||
}
|
||
|
||
}
|
||
}
|