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568 lines
16 KiB
C++
568 lines
16 KiB
C++
#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 <boost/filesystem.hpp>
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#include <boost/lexical_cast.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 "Log.h"
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#include "NetDb.h"
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#include "ClientContext.h"
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#include "AddressBook.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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class AddressBookFilesystemStorage: public AddressBookStorage
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{
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public:
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AddressBookFilesystemStorage ();
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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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int Load (std::map<std::string, i2p::data::IdentHash>& addresses);
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int Save (const std::map<std::string, i2p::data::IdentHash>& addresses);
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private:
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boost::filesystem::path GetPath () const { return i2p::util::filesystem::GetDefaultDataDir() / "addressbook"; };
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};
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AddressBookFilesystemStorage::AddressBookFilesystemStorage ()
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{
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auto path = GetPath ();
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if (!boost::filesystem::exists (path))
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{
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// Create directory is necessary
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if (!boost::filesystem::create_directory (path))
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LogPrint (eLogError, "Failed to create addressbook directory");
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}
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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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auto filename = GetPath () / (ident.ToBase32() + ".b32");
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std::ifstream f(filename.c_str (), std::ifstream::binary);
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if (f.is_open ())
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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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{
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LogPrint (eLogError, "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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else
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return nullptr;
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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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auto filename = GetPath () / (address->GetIdentHash ().ToBase32() + ".b32");
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std::ofstream f (filename.c_str (), std::ofstream::binary | std::ofstream::out);
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if (f.is_open ())
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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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else
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LogPrint (eLogError, "Can't open file ", filename);
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}
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void AddressBookFilesystemStorage::RemoveAddress (const i2p::data::IdentHash& ident)
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{
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auto filename = GetPath () / (ident.ToBase32() + ".b32");
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if (boost::filesystem::exists (filename))
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boost::filesystem::remove (filename);
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}
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int AddressBookFilesystemStorage::Load (std::map<std::string, i2p::data::IdentHash>& addresses)
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{
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int num = 0;
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auto filename = GetPath () / "addresses.csv";
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std::ifstream f (filename.c_str (), std::ofstream::in); // in text mode
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if (f.is_open ())
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{
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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())
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continue; // skip empty 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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i2p::data::IdentHash ident;
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ident.FromBase32 (addr);
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addresses[name] = ident;
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num++;
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}
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}
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LogPrint (eLogInfo, num, " addresses loaded");
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}
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else
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LogPrint (eLogWarning, filename, " not found");
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return num;
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}
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int AddressBookFilesystemStorage::Save (const std::map<std::string, i2p::data::IdentHash>& addresses)
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{
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int num = 0;
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auto filename = GetPath () / "addresses.csv";
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std::ofstream f (filename.c_str (), std::ofstream::out); // in text mode
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if (f.is_open ())
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{
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for (auto it: addresses)
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{
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f << it.first << "," << it.second.ToBase32 () << std::endl;
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num++;
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}
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LogPrint (eLogInfo, num, " addresses saved");
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}
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else
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LogPrint (eLogError, "Can't open file ", filename);
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return num;
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}
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//---------------------------------------------------------------------
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AddressBook::AddressBook (): m_Storage (nullptr), m_IsLoaded (false), m_IsDownloading (false),
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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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StartSubscriptions ();
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}
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void AddressBook::Stop ()
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{
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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, "Subscription is downloading. Waiting for temination...");
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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, "Subscription 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, "Subscription download hangs");
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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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if (m_DefaultSubscription)
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{
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delete m_DefaultSubscription;
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m_DefaultSubscription = nullptr;
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}
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for (auto it: m_Subscriptions)
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delete it;
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m_Subscriptions.clear ();
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}
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AddressBookStorage * AddressBook::CreateStorage ()
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{
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return new AddressBookFilesystemStorage ();
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}
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bool AddressBook::GetIdentHash (const std::string& address, i2p::data::IdentHash& ident)
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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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Base32ToByteStream (address.c_str(), pos, ident, 32);
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return true;
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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 identHash = FindAddress (address);
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if (identHash)
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{
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ident = *identHash;
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return true;
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}
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else
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return false;
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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 false;
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ident = dest.GetIdentHash ();
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return true;
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}
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const i2p::data::IdentHash * AddressBook::FindAddress (const std::string& address)
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{
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if (!m_IsLoaded)
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LoadHosts ();
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if (m_IsLoaded)
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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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}
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return nullptr;
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}
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void AddressBook::InsertAddress (const std::string& address, const std::string& base64)
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{
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auto ident = std::make_shared<i2p::data::IdentityEx>();
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ident->FromBase64 (base64);
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if (!m_Storage)
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m_Storage = CreateStorage ();
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m_Storage->AddAddress (ident);
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m_Addresses[address] = ident->GetIdentHash ();
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LogPrint (address,"->", ToAddress(ident->GetIdentHash ()), " added");
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}
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void AddressBook::InsertAddress (std::shared_ptr<const i2p::data::IdentityEx> address)
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{
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if (!m_Storage)
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m_Storage = CreateStorage ();
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m_Storage->AddAddress (address);
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}
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std::shared_ptr<const i2p::data::IdentityEx> AddressBook::GetAddress (const std::string& address)
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{
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if (!m_Storage)
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m_Storage = CreateStorage ();
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i2p::data::IdentHash ident;
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if (!GetIdentHash (address, ident)) return nullptr;
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return m_Storage->GetAddress (ident);
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}
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void AddressBook::LoadHosts ()
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{
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if (!m_Storage)
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m_Storage = CreateStorage ();
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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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// try hosts.txt first
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std::ifstream f (i2p::util::filesystem::GetFullPath ("hosts.txt").c_str (), std::ofstream::in); // in text mode
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if (f.is_open ())
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{
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LoadHostsFromStream (f);
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m_IsLoaded = true;
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}
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else
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{
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// if not found download it from http://i2p-projekt.i2p/hosts.txt
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LogPrint (eLogInfo, "hosts.txt not found. Try to download it from default subscription...");
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if (!m_IsDownloading)
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{
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m_IsDownloading = true;
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if (!m_DefaultSubscription)
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m_DefaultSubscription = new AddressBookSubscription (*this, DEFAULT_SUBSCRIPTION_ADDRESS);
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m_DefaultSubscription->CheckSubscription ();
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}
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}
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}
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void AddressBook::LoadHostsFromStream (std::istream& f)
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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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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())
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continue; // skip empty 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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auto ident = std::make_shared<i2p::data::IdentityEx> ();
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if (ident->FromBase64(addr))
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{
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m_Addresses[name] = ident->GetIdentHash ();
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m_Storage->AddAddress (ident);
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numAddresses++;
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}
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else
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LogPrint (eLogError, "Malformed address ", addr, " for ", name);
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}
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}
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LogPrint (eLogInfo, numAddresses, " addresses processed");
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if (numAddresses > 0)
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{
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m_IsLoaded = true;
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m_Storage->Save (m_Addresses);
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}
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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::util::filesystem::GetFullPath ("subscriptions.txt").c_str (), std::ofstream::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 (new AddressBookSubscription (*this, s));
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}
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LogPrint (eLogInfo, m_Subscriptions.size (), " subscriptions loaded");
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}
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else
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LogPrint (eLogWarning, "subscriptions.txt not found");
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}
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else
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LogPrint (eLogError, "Subscriptions already loaded");
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}
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void AddressBook::DownloadComplete (bool success)
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{
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m_IsDownloading = false;
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if (m_SubscriptionsUpdateTimer)
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{
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m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(
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success ? CONTINIOUS_SUBSCRIPTION_UPDATE_TIMEOUT : CONTINIOUS_SUBSCRIPTION_RETRY_TIMEOUT));
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m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer,
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this, std::placeholders::_1));
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}
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}
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void AddressBook::StartSubscriptions ()
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{
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LoadSubscriptions ();
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if (!m_Subscriptions.size ()) return;
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auto dest = i2p::client::context.GetSharedLocalDestination ();
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if (dest)
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{
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m_SubscriptionsUpdateTimer = new boost::asio::deadline_timer (dest->GetService ());
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m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(INITIAL_SUBSCRIPTION_UPDATE_TIMEOUT));
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m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer,
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this, std::placeholders::_1));
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}
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else
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LogPrint (eLogError, "Can't start subscriptions: missing shared local destination");
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}
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void AddressBook::StopSubscriptions ()
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{
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if (m_SubscriptionsUpdateTimer)
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m_SubscriptionsUpdateTimer->cancel ();
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}
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void AddressBook::HandleSubscriptionsUpdateTimer (const boost::system::error_code& ecode)
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{
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if (ecode != boost::asio::error::operation_aborted)
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{
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auto dest = i2p::client::context.GetSharedLocalDestination ();
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if (!dest) return;
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if (m_IsLoaded && !m_IsDownloading && dest->IsReady () && !m_Subscriptions.empty ())
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{
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// pick random subscription
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auto ind = rand () % m_Subscriptions.size();
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m_IsDownloading = true;
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m_Subscriptions[ind]->CheckSubscription ();
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}
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else
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{
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if (!m_IsLoaded)
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LoadHosts ();
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// try it again later
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m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(INITIAL_SUBSCRIPTION_RETRY_TIMEOUT));
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m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer,
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this, std::placeholders::_1));
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}
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}
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}
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AddressBookSubscription::AddressBookSubscription (AddressBook& book, const std::string& link):
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m_Book (book), m_Link (link)
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{
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}
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void AddressBookSubscription::CheckSubscription ()
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{
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std::thread load_hosts(&AddressBookSubscription::Request, this);
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load_hosts.detach(); // TODO: use join
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}
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void AddressBookSubscription::Request ()
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{
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// must be run in separate thread
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LogPrint (eLogInfo, "Downloading hosts from ", m_Link, " ETag: ", m_Etag, " Last-Modified: ", m_LastModified);
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bool success = false;
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i2p::util::http::url u (m_Link);
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i2p::data::IdentHash ident;
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if (m_Book.GetIdentHash (u.host_, ident))
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{
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std::condition_variable newDataReceived;
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std::mutex newDataReceivedMutex;
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auto leaseSet = i2p::client::context.GetSharedLocalDestination ()->FindLeaseSet (ident);
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if (!leaseSet)
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{
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std::unique_lock<std::mutex> l(newDataReceivedMutex);
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i2p::client::context.GetSharedLocalDestination ()->RequestDestination (ident,
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[&newDataReceived, &leaseSet](std::shared_ptr<i2p::data::LeaseSet> ls)
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{
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leaseSet = ls;
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newDataReceived.notify_all ();
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});
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if (newDataReceived.wait_for (l, std::chrono::seconds (SUBSCRIPTION_REQUEST_TIMEOUT)) == std::cv_status::timeout)
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LogPrint (eLogError, "Subscription LeseseSet request timeout expired");
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}
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if (leaseSet)
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{
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std::stringstream request, response;
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// standard header
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request << "GET " << u.path_ << " HTTP/1.1\r\nHost: " << u.host_
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<< "\r\nAccept: */*\r\n" << "User-Agent: Wget/1.11.4\r\n" << "Connection: close\r\n";
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if (m_Etag.length () > 0) // etag
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request << i2p::util::http::IF_NONE_MATCH << ": \"" << m_Etag << "\"\r\n";
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if (m_LastModified.length () > 0) // if-modfief-since
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request << i2p::util::http::IF_MODIFIED_SINCE << ": " << m_LastModified << "\r\n";
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request << "\r\n"; // end of header
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auto stream = i2p::client::context.GetSharedLocalDestination ()->CreateStream (leaseSet, u.port_);
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stream->Send ((uint8_t *)request.str ().c_str (), request.str ().length ());
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uint8_t buf[4096];
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bool end = false;
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while (!end)
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{
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stream->AsyncReceive (boost::asio::buffer (buf, 4096),
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[&](const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (bytes_transferred)
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response.write ((char *)buf, bytes_transferred);
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if (ecode == boost::asio::error::timed_out || !stream->IsOpen ())
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end = true;
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newDataReceived.notify_all ();
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},
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30); // wait for 30 seconds
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std::unique_lock<std::mutex> l(newDataReceivedMutex);
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if (newDataReceived.wait_for (l, std::chrono::seconds (SUBSCRIPTION_REQUEST_TIMEOUT)) == std::cv_status::timeout)
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LogPrint (eLogError, "Subscription timeout expired");
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}
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// process remaining buffer
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while (size_t len = stream->ReadSome (buf, 4096))
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response.write ((char *)buf, len);
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// parse response
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std::string version;
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response >> version; // HTTP version
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int status = 0;
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response >> status; // status
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if (status == 200) // OK
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{
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bool isChunked = false;
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std::string header, statusMessage;
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std::getline (response, statusMessage);
|
|
// read until new line meaning end of header
|
|
while (!response.eof () && header != "\r")
|
|
{
|
|
std::getline (response, header);
|
|
auto colon = header.find (':');
|
|
if (colon != std::string::npos)
|
|
{
|
|
std::string field = header.substr (0, colon);
|
|
header.resize (header.length () - 1); // delete \r
|
|
if (field == i2p::util::http::ETAG)
|
|
m_Etag = header.substr (colon + 1);
|
|
else if (field == i2p::util::http::LAST_MODIFIED)
|
|
m_LastModified = header.substr (colon + 1);
|
|
else if (field == i2p::util::http::TRANSFER_ENCODING)
|
|
isChunked = !header.compare (colon + 1, std::string::npos, "chunked");
|
|
}
|
|
}
|
|
LogPrint (eLogInfo, m_Link, " ETag: ", m_Etag, " Last-Modified: ", m_LastModified);
|
|
if (!response.eof ())
|
|
{
|
|
success = true;
|
|
if (!isChunked)
|
|
m_Book.LoadHostsFromStream (response);
|
|
else
|
|
{
|
|
// merge chunks
|
|
std::stringstream merged;
|
|
i2p::util::http::MergeChunkedResponse (response, merged);
|
|
m_Book.LoadHostsFromStream (merged);
|
|
}
|
|
}
|
|
}
|
|
else if (status == 304)
|
|
{
|
|
success = true;
|
|
LogPrint (eLogInfo, "No updates from ", m_Link);
|
|
}
|
|
else
|
|
LogPrint (eLogWarning, "Adressbook HTTP response ", status);
|
|
}
|
|
else
|
|
LogPrint (eLogError, "Address ", u.host_, " not found");
|
|
}
|
|
else
|
|
LogPrint (eLogError, "Can't resolve ", u.host_);
|
|
LogPrint (eLogInfo, "Download complete ", success ? "Success" : "Failed");
|
|
m_Book.DownloadComplete (success);
|
|
}
|
|
}
|
|
}
|
|
|