mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-13 13:10:28 +00:00
799 lines
24 KiB
C++
799 lines
24 KiB
C++
/*
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* Copyright (c) 2013-2022, 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 <fstream>
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#include <sstream>
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#include <boost/asio.hpp>
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#include <boost/asio/ssl.hpp>
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#include <boost/algorithm/string.hpp>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <zlib.h>
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#include "Crypto.h"
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#include "I2PEndian.h"
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#include "Reseed.h"
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#include "FS.h"
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#include "Log.h"
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#include "Identity.h"
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#include "NetDb.hpp"
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#include "HTTP.h"
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#include "util.h"
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#include "Config.h"
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namespace i2p
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{
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namespace data
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{
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Reseeder::Reseeder()
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{
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}
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Reseeder::~Reseeder()
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{
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}
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/**
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@brief tries to bootstrap into I2P network (from local files and servers, with respect of options)
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*/
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void Reseeder::Bootstrap ()
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{
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std::string su3FileName; i2p::config::GetOption("reseed.file", su3FileName);
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std::string zipFileName; i2p::config::GetOption("reseed.zipfile", zipFileName);
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if (su3FileName.length() > 0) // bootstrap from SU3 file or URL
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{
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int num;
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if (su3FileName.length() > 8 && su3FileName.substr(0, 8) == "https://")
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{
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num = ReseedFromSU3Url (su3FileName); // from https URL
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}
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else
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{
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num = ProcessSU3File (su3FileName.c_str ());
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}
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if (num == 0)
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LogPrint (eLogWarning, "Reseed: Failed to reseed from ", su3FileName);
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}
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else if (zipFileName.length() > 0) // bootstrap from ZIP file
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{
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int num = ProcessZIPFile (zipFileName.c_str ());
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if (num == 0)
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LogPrint (eLogWarning, "Reseed: Failed to reseed from ", zipFileName);
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}
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else // bootstrap from reseed servers
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{
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int num = ReseedFromServers ();
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if (num == 0)
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LogPrint (eLogWarning, "Reseed: Failed to reseed from servers");
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}
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}
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/**
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* @brief bootstrap from random server, retry 10 times
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* @return number of entries added to netDb
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*/
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int Reseeder::ReseedFromServers ()
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{
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bool ipv6; i2p::config::GetOption("ipv6", ipv6);
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bool ipv4; i2p::config::GetOption("ipv4", ipv4);
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bool yggdrasil; i2p::config::GetOption("meshnets.yggdrasil", yggdrasil);
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std::vector<std::string> httpsReseedHostList;
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if (ipv4 || ipv6)
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{
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std::string reseedURLs; i2p::config::GetOption("reseed.urls", reseedURLs);
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if (!reseedURLs.empty ())
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boost::split(httpsReseedHostList, reseedURLs, boost::is_any_of(","), boost::token_compress_on);
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}
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std::vector<std::string> yggReseedHostList;
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if (yggdrasil && !i2p::util::net::GetYggdrasilAddress ().is_unspecified ())
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{
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LogPrint (eLogInfo, "Reseed: Yggdrasil is supported");
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std::string yggReseedURLs; i2p::config::GetOption("reseed.yggurls", yggReseedURLs);
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if (!yggReseedURLs.empty ())
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boost::split(yggReseedHostList, yggReseedURLs, boost::is_any_of(","), boost::token_compress_on);
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}
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if (httpsReseedHostList.empty () && yggReseedHostList.empty())
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{
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LogPrint (eLogWarning, "Reseed: No reseed servers specified");
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return 0;
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}
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int reseedRetries = 0;
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while (reseedRetries < 10)
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{
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auto ind = rand () % (httpsReseedHostList.size () + yggReseedHostList.size ());
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bool isHttps = ind < httpsReseedHostList.size ();
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std::string reseedUrl = isHttps ? httpsReseedHostList[ind] :
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yggReseedHostList[ind - httpsReseedHostList.size ()];
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reseedUrl += "i2pseeds.su3";
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auto num = ReseedFromSU3Url (reseedUrl, isHttps);
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if (num > 0) return num; // success
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reseedRetries++;
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}
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LogPrint (eLogWarning, "Reseed: Failed to reseed from servers after 10 attempts");
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return 0;
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}
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/**
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* @brief bootstrap from HTTPS URL with SU3 file
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* @param url
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* @return number of entries added to netDb
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*/
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int Reseeder::ReseedFromSU3Url (const std::string& url, bool isHttps)
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{
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LogPrint (eLogInfo, "Reseed: Downloading SU3 from ", url);
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std::string su3 = isHttps ? HttpsRequest (url) : YggdrasilRequest (url);
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if (su3.length () > 0)
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{
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std::stringstream s(su3);
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return ProcessSU3Stream (s);
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}
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else
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{
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LogPrint (eLogWarning, "Reseed: SU3 download failed");
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return 0;
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}
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}
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int Reseeder::ProcessSU3File (const char * filename)
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{
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std::ifstream s(filename, std::ifstream::binary);
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if (s.is_open ())
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return ProcessSU3Stream (s);
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else
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{
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LogPrint (eLogError, "Reseed: Can't open file ", filename);
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return 0;
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}
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}
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int Reseeder::ProcessZIPFile (const char * filename)
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{
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std::ifstream s(filename, std::ifstream::binary);
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if (s.is_open ())
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{
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s.seekg (0, std::ios::end);
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auto len = s.tellg ();
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s.seekg (0, std::ios::beg);
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return ProcessZIPStream (s, len);
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}
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else
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{
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LogPrint (eLogError, "Reseed: Can't open file ", filename);
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return 0;
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}
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}
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const char SU3_MAGIC_NUMBER[]="I2Psu3";
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int Reseeder::ProcessSU3Stream (std::istream& s)
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{
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char magicNumber[7];
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s.read (magicNumber, 7); // magic number and zero byte 6
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if (strcmp (magicNumber, SU3_MAGIC_NUMBER))
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{
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LogPrint (eLogError, "Reseed: Unexpected SU3 magic number");
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return 0;
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}
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s.seekg (1, std::ios::cur); // su3 file format version
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SigningKeyType signatureType;
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s.read ((char *)&signatureType, 2); // signature type
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signatureType = be16toh (signatureType);
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uint16_t signatureLength;
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s.read ((char *)&signatureLength, 2); // signature length
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signatureLength = be16toh (signatureLength);
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s.seekg (1, std::ios::cur); // unused
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uint8_t versionLength;
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s.read ((char *)&versionLength, 1); // version length
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s.seekg (1, std::ios::cur); // unused
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uint8_t signerIDLength;
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s.read ((char *)&signerIDLength, 1); // signer ID length
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uint64_t contentLength;
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s.read ((char *)&contentLength, 8); // content length
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contentLength = be64toh (contentLength);
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s.seekg (1, std::ios::cur); // unused
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uint8_t fileType;
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s.read ((char *)&fileType, 1); // file type
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if (fileType != 0x00) // zip file
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{
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LogPrint (eLogError, "Reseed: Can't handle file type ", (int)fileType);
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return 0;
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}
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s.seekg (1, std::ios::cur); // unused
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uint8_t contentType;
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s.read ((char *)&contentType, 1); // content type
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if (contentType != 0x03) // reseed data
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{
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LogPrint (eLogError, "Reseed: Unexpected content type ", (int)contentType);
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return 0;
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}
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s.seekg (12, std::ios::cur); // unused
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s.seekg (versionLength, std::ios::cur); // skip version
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char signerID[256];
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s.read (signerID, signerIDLength); // signerID
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signerID[signerIDLength] = 0;
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bool verify; i2p::config::GetOption("reseed.verify", verify);
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if (verify)
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{
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//try to verify signature
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auto it = m_SigningKeys.find (signerID);
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if (it != m_SigningKeys.end ())
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{
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// TODO: implement all signature types
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if (signatureType == SIGNING_KEY_TYPE_RSA_SHA512_4096)
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{
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size_t pos = s.tellg ();
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size_t tbsLen = pos + contentLength;
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uint8_t * tbs = new uint8_t[tbsLen];
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s.seekg (0, std::ios::beg);
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s.read ((char *)tbs, tbsLen);
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uint8_t * signature = new uint8_t[signatureLength];
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s.read ((char *)signature, signatureLength);
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// RSA-raw
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{
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// calculate digest
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uint8_t digest[64];
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SHA512 (tbs, tbsLen, digest);
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// encrypt signature
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BN_CTX * bnctx = BN_CTX_new ();
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BIGNUM * s = BN_new (), * n = BN_new ();
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BN_bin2bn (signature, signatureLength, s);
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BN_bin2bn (it->second, 512, n); // RSA 4096 assumed
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BN_mod_exp (s, s, i2p::crypto::GetRSAE (), n, bnctx); // s = s^e mod n
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uint8_t * enSigBuf = new uint8_t[signatureLength];
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i2p::crypto::bn2buf (s, enSigBuf, signatureLength);
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// digest is right aligned
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// we can't use RSA_verify due wrong padding in SU3
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if (memcmp (enSigBuf + (signatureLength - 64), digest, 64))
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LogPrint (eLogWarning, "Reseed: SU3 signature verification failed");
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else
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verify = false; // verified
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delete[] enSigBuf;
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BN_free (s); BN_free (n);
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BN_CTX_free (bnctx);
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}
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delete[] signature;
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delete[] tbs;
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s.seekg (pos, std::ios::beg);
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}
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else
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LogPrint (eLogWarning, "Reseed: Signature type ", signatureType, " is not supported");
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}
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else
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LogPrint (eLogWarning, "Reseed: Certificate for ", signerID, " not loaded");
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}
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if (verify) // not verified
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{
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LogPrint (eLogError, "Reseed: SU3 verification failed");
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return 0;
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}
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// handle content
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return ProcessZIPStream (s, contentLength);
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}
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const uint32_t ZIP_HEADER_SIGNATURE = 0x04034B50;
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const uint32_t ZIP_CENTRAL_DIRECTORY_HEADER_SIGNATURE = 0x02014B50;
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const uint16_t ZIP_BIT_FLAG_DATA_DESCRIPTOR = 0x0008;
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int Reseeder::ProcessZIPStream (std::istream& s, uint64_t contentLength)
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{
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int numFiles = 0;
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size_t contentPos = s.tellg ();
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while (!s.eof ())
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{
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uint32_t signature;
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s.read ((char *)&signature, 4);
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signature = le32toh (signature);
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if (signature == ZIP_HEADER_SIGNATURE)
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{
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// next local file
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s.seekg (2, std::ios::cur); // version
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uint16_t bitFlag;
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s.read ((char *)&bitFlag, 2);
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bitFlag = le16toh (bitFlag);
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uint16_t compressionMethod;
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s.read ((char *)&compressionMethod, 2);
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compressionMethod = le16toh (compressionMethod);
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s.seekg (4, std::ios::cur); // skip fields we don't care about
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uint32_t compressedSize, uncompressedSize;
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uint32_t crc_32;
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s.read ((char *)&crc_32, 4);
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crc_32 = le32toh (crc_32);
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s.read ((char *)&compressedSize, 4);
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compressedSize = le32toh (compressedSize);
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s.read ((char *)&uncompressedSize, 4);
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uncompressedSize = le32toh (uncompressedSize);
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uint16_t fileNameLength, extraFieldLength;
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s.read ((char *)&fileNameLength, 2);
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fileNameLength = le16toh (fileNameLength);
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if ( fileNameLength > 255 ) {
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// too big
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LogPrint(eLogError, "Reseed: SU3 fileNameLength too large: ", fileNameLength);
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return numFiles;
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}
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s.read ((char *)&extraFieldLength, 2);
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extraFieldLength = le16toh (extraFieldLength);
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char localFileName[255];
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s.read (localFileName, fileNameLength);
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localFileName[fileNameLength] = 0;
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s.seekg (extraFieldLength, std::ios::cur);
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// take care about data descriptor if presented
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if (bitFlag & ZIP_BIT_FLAG_DATA_DESCRIPTOR)
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{
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size_t pos = s.tellg ();
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if (!FindZipDataDescriptor (s))
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{
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LogPrint (eLogError, "Reseed: SU3 archive data descriptor not found");
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return numFiles;
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}
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s.read ((char *)&crc_32, 4);
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crc_32 = le32toh (crc_32);
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s.read ((char *)&compressedSize, 4);
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compressedSize = le32toh (compressedSize) + 4; // ??? we must consider signature as part of compressed data
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s.read ((char *)&uncompressedSize, 4);
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uncompressedSize = le32toh (uncompressedSize);
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// now we know compressed and uncompressed size
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s.seekg (pos, std::ios::beg); // back to compressed data
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}
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LogPrint (eLogDebug, "Reseed: Processing file ", localFileName, " ", compressedSize, " bytes");
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if (!compressedSize)
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{
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LogPrint (eLogWarning, "Reseed: Unexpected size 0. Skipped");
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continue;
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}
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uint8_t * compressed = new uint8_t[compressedSize];
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s.read ((char *)compressed, compressedSize);
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if (compressionMethod) // we assume Deflate
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{
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z_stream inflator;
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memset (&inflator, 0, sizeof (inflator));
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inflateInit2 (&inflator, -MAX_WBITS); // no zlib header
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uint8_t * uncompressed = new uint8_t[uncompressedSize];
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inflator.next_in = compressed;
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inflator.avail_in = compressedSize;
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inflator.next_out = uncompressed;
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inflator.avail_out = uncompressedSize;
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int err;
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if ((err = inflate (&inflator, Z_SYNC_FLUSH)) >= 0)
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{
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uncompressedSize -= inflator.avail_out;
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if (crc32 (0, uncompressed, uncompressedSize) == crc_32)
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{
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i2p::data::netdb.AddRouterInfo (uncompressed, uncompressedSize);
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numFiles++;
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}
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else
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LogPrint (eLogError, "Reseed: CRC32 verification failed");
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}
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else
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LogPrint (eLogError, "Reseed: SU3 decompression error ", err);
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delete[] uncompressed;
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inflateEnd (&inflator);
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}
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else // no compression
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{
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i2p::data::netdb.AddRouterInfo (compressed, compressedSize);
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numFiles++;
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}
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delete[] compressed;
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if (bitFlag & ZIP_BIT_FLAG_DATA_DESCRIPTOR)
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s.seekg (12, std::ios::cur); // skip data descriptor section if presented (12 = 16 - 4)
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}
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else
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{
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if (signature != ZIP_CENTRAL_DIRECTORY_HEADER_SIGNATURE)
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LogPrint (eLogWarning, "Reseed: Missing zip central directory header");
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break; // no more files
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}
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size_t end = s.tellg ();
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if (end - contentPos >= contentLength)
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break; // we are beyond contentLength
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}
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if (numFiles) // check if routers are not outdated
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{
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auto ts = i2p::util::GetMillisecondsSinceEpoch ();
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int numOutdated = 0;
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i2p::data::netdb.VisitRouterInfos (
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[&numOutdated, ts](std::shared_ptr<const RouterInfo> r)
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{
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if (r && ts > r->GetTimestamp () + 10*i2p::data::NETDB_MAX_EXPIRATION_TIMEOUT*1000LL) // 270 hours
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{
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LogPrint (eLogError, "Reseed: Router ", r->GetIdentHash().ToBase64 (), " is outdated by ", (ts - r->GetTimestamp ())/1000LL/3600LL, " hours");
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numOutdated++;
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}
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});
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if (numOutdated > numFiles/2) // more than half
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{
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LogPrint (eLogError, "Reseed: Mammoth's shit\n"
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" *_____*\n"
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" *_*****_*\n"
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" *_(O)_(O)_*\n"
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" **____V____**\n"
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" **_________**\n"
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" **_________**\n"
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" *_________*\n"
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" ***___***");
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i2p::data::netdb.ClearRouterInfos ();
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numFiles = 0;
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}
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}
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return numFiles;
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}
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const uint8_t ZIP_DATA_DESCRIPTOR_SIGNATURE[] = { 0x50, 0x4B, 0x07, 0x08 };
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bool Reseeder::FindZipDataDescriptor (std::istream& s)
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{
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size_t nextInd = 0;
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while (!s.eof ())
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{
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uint8_t nextByte;
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s.read ((char *)&nextByte, 1);
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if (nextByte == ZIP_DATA_DESCRIPTOR_SIGNATURE[nextInd])
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{
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nextInd++;
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if (nextInd >= sizeof (ZIP_DATA_DESCRIPTOR_SIGNATURE))
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return true;
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}
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else
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nextInd = 0;
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}
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return false;
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}
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void Reseeder::LoadCertificate (const std::string& filename)
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{
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SSL_CTX * ctx = SSL_CTX_new (TLS_method ());
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int ret = SSL_CTX_use_certificate_file (ctx, filename.c_str (), SSL_FILETYPE_PEM);
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if (ret)
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{
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SSL * ssl = SSL_new (ctx);
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X509 * cert = SSL_get_certificate (ssl);
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// verify
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if (cert)
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{
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// extract issuer name
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char name[100];
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X509_NAME_oneline (X509_get_issuer_name(cert), name, 100);
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char * cn = strstr (name, "CN=");
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if (cn)
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{
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cn += 3;
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char * terminator = strchr (cn, '/');
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if (terminator) terminator[0] = 0;
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}
|
|
// extract RSA key (we need n only, e = 65537)
|
|
const RSA * key = EVP_PKEY_get0_RSA (X509_get_pubkey (cert));
|
|
const BIGNUM * n, * e, * d;
|
|
RSA_get0_key(key, &n, &e, &d);
|
|
PublicKey value;
|
|
i2p::crypto::bn2buf (n, value, 512);
|
|
if (cn)
|
|
m_SigningKeys[cn] = value;
|
|
else
|
|
LogPrint (eLogError, "Reseed: Can't find CN field in ", filename);
|
|
}
|
|
SSL_free (ssl);
|
|
}
|
|
else
|
|
LogPrint (eLogError, "Reseed: Can't open certificate file ", filename);
|
|
SSL_CTX_free (ctx);
|
|
}
|
|
|
|
void Reseeder::LoadCertificates ()
|
|
{
|
|
std::string certDir = i2p::fs::GetCertsDir() + i2p::fs::dirSep + "reseed";
|
|
|
|
std::vector<std::string> files;
|
|
int numCertificates = 0;
|
|
|
|
if (!i2p::fs::ReadDir(certDir, files)) {
|
|
LogPrint(eLogWarning, "Reseed: Can't load reseed certificates from ", certDir);
|
|
return;
|
|
}
|
|
|
|
for (const std::string & file : files) {
|
|
if (file.compare(file.size() - 4, 4, ".crt") != 0) {
|
|
LogPrint(eLogWarning, "Reseed: Ignoring file ", file);
|
|
continue;
|
|
}
|
|
LoadCertificate (file);
|
|
numCertificates++;
|
|
}
|
|
LogPrint (eLogInfo, "Reseed: ", numCertificates, " certificates loaded");
|
|
}
|
|
|
|
std::string Reseeder::HttpsRequest (const std::string& address)
|
|
{
|
|
i2p::http::URL proxyUrl;
|
|
std::string proxy; i2p::config::GetOption("reseed.proxy", proxy);
|
|
// check for proxy url
|
|
if(proxy.size()) {
|
|
// parse
|
|
if(proxyUrl.parse(proxy)) {
|
|
if (proxyUrl.schema == "http" && !proxyUrl.port) {
|
|
proxyUrl.port = 80;
|
|
} else if (proxyUrl.schema == "socks" && !proxyUrl.port) {
|
|
proxyUrl.port = 1080;
|
|
}
|
|
// check for valid proxy url schema
|
|
if (proxyUrl.schema != "http" && proxyUrl.schema != "socks") {
|
|
LogPrint(eLogError, "Reseed: Bad proxy url: ", proxy);
|
|
return "";
|
|
}
|
|
} else {
|
|
LogPrint(eLogError, "Reseed: Bad proxy url: ", proxy);
|
|
return "";
|
|
}
|
|
}
|
|
i2p::http::URL url;
|
|
if (!url.parse(address)) {
|
|
LogPrint(eLogError, "Reseed: Failed to parse url: ", address);
|
|
return "";
|
|
}
|
|
url.schema = "https";
|
|
if (!url.port)
|
|
url.port = 443;
|
|
|
|
boost::asio::io_service service;
|
|
boost::system::error_code ecode;
|
|
|
|
boost::asio::ssl::context ctx(boost::asio::ssl::context::sslv23);
|
|
ctx.set_verify_mode(boost::asio::ssl::context::verify_none);
|
|
boost::asio::ssl::stream<boost::asio::ip::tcp::socket> s(service, ctx);
|
|
|
|
if(proxyUrl.schema.size())
|
|
{
|
|
// proxy connection
|
|
auto it = boost::asio::ip::tcp::resolver(service).resolve (
|
|
boost::asio::ip::tcp::resolver::query (proxyUrl.host, std::to_string(proxyUrl.port)), ecode);
|
|
if(!ecode)
|
|
{
|
|
s.lowest_layer().connect(*it, ecode);
|
|
if(!ecode)
|
|
{
|
|
auto & sock = s.next_layer();
|
|
if(proxyUrl.schema == "http")
|
|
{
|
|
i2p::http::HTTPReq proxyReq;
|
|
i2p::http::HTTPRes proxyRes;
|
|
proxyReq.method = "CONNECT";
|
|
proxyReq.version = "HTTP/1.1";
|
|
proxyReq.uri = url.host + ":" + std::to_string(url.port);
|
|
auto auth = i2p::http::CreateBasicAuthorizationString (proxyUrl.user, proxyUrl.pass);
|
|
if (!auth.empty ())
|
|
proxyReq.AddHeader("Proxy-Authorization", auth);
|
|
|
|
boost::asio::streambuf writebuf, readbuf;
|
|
std::ostream out(&writebuf);
|
|
out << proxyReq.to_string();
|
|
|
|
boost::asio::write(sock, writebuf.data(), boost::asio::transfer_all(), ecode);
|
|
if (ecode)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: HTTP CONNECT write error: ", ecode.message());
|
|
return "";
|
|
}
|
|
boost::asio::read_until(sock, readbuf, "\r\n\r\n", ecode);
|
|
if (ecode)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: HTTP CONNECT read error: ", ecode.message());
|
|
return "";
|
|
}
|
|
if(proxyRes.parse(boost::asio::buffer_cast<const char *>(readbuf.data()), readbuf.size()) <= 0)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: HTTP CONNECT malformed reply");
|
|
return "";
|
|
}
|
|
if(proxyRes.code != 200)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: HTTP CONNECT got bad status: ", proxyRes.code);
|
|
return "";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// assume socks if not http, is checked before this for other types
|
|
// TODO: support username/password auth etc
|
|
uint8_t hs_writebuf[3] = {0x05, 0x01, 0x00};
|
|
uint8_t hs_readbuf[2];
|
|
boost::asio::write(sock, boost::asio::buffer(hs_writebuf, 3), boost::asio::transfer_all(), ecode);
|
|
if(ecode)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: SOCKS handshake write failed: ", ecode.message());
|
|
return "";
|
|
}
|
|
boost::asio::read(sock, boost::asio::buffer(hs_readbuf, 2), ecode);
|
|
if(ecode)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: SOCKS handshake read failed: ", ecode.message());
|
|
return "";
|
|
}
|
|
size_t sz = 0;
|
|
uint8_t buf[256];
|
|
|
|
buf[0] = 0x05;
|
|
buf[1] = 0x01;
|
|
buf[2] = 0x00;
|
|
buf[3] = 0x03;
|
|
sz += 4;
|
|
size_t hostsz = url.host.size();
|
|
if(1 + 2 + hostsz + sz > sizeof(buf))
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: SOCKS handshake failed, hostname too big: ", url.host);
|
|
return "";
|
|
}
|
|
buf[4] = (uint8_t) hostsz;
|
|
memcpy(buf+5, url.host.c_str(), hostsz);
|
|
sz += hostsz + 1;
|
|
htobe16buf(buf+sz, url.port);
|
|
sz += 2;
|
|
boost::asio::write(sock, boost::asio::buffer(buf, sz), boost::asio::transfer_all(), ecode);
|
|
if(ecode)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: SOCKS handshake failed writing: ", ecode.message());
|
|
return "";
|
|
}
|
|
boost::asio::read(sock, boost::asio::buffer(buf, 10), ecode);
|
|
if(ecode)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: SOCKS handshake failed reading: ", ecode.message());
|
|
return "";
|
|
}
|
|
if(buf[1] != 0x00)
|
|
{
|
|
sock.close();
|
|
LogPrint(eLogError, "Reseed: SOCKS handshake bad reply code: ", std::to_string(buf[1]));
|
|
return "";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// direct connection
|
|
auto it = boost::asio::ip::tcp::resolver(service).resolve (
|
|
boost::asio::ip::tcp::resolver::query (url.host, std::to_string(url.port)), ecode);
|
|
if (!ecode)
|
|
{
|
|
bool connected = false;
|
|
boost::asio::ip::tcp::resolver::iterator end;
|
|
while (it != end)
|
|
{
|
|
boost::asio::ip::tcp::endpoint ep = *it;
|
|
if ((ep.address ().is_v4 () && i2p::context.SupportsV4 ()) ||
|
|
(ep.address ().is_v6 () && i2p::context.SupportsV6 ()))
|
|
{
|
|
s.lowest_layer().connect (ep, ecode);
|
|
if (!ecode)
|
|
{
|
|
connected = true;
|
|
break;
|
|
}
|
|
}
|
|
it++;
|
|
}
|
|
if (!connected)
|
|
{
|
|
LogPrint(eLogError, "Reseed: Failed to connect to ", url.host);
|
|
return "";
|
|
}
|
|
}
|
|
}
|
|
if (!ecode)
|
|
{
|
|
SSL_set_tlsext_host_name(s.native_handle(), url.host.c_str ());
|
|
s.handshake (boost::asio::ssl::stream_base::client, ecode);
|
|
if (!ecode)
|
|
{
|
|
LogPrint (eLogDebug, "Reseed: Connected to ", url.host, ":", url.port);
|
|
return ReseedRequest (s, url.to_string());
|
|
}
|
|
else
|
|
LogPrint (eLogError, "Reseed: SSL handshake failed: ", ecode.message ());
|
|
}
|
|
else
|
|
LogPrint (eLogError, "Reseed: Couldn't connect to ", url.host, ": ", ecode.message ());
|
|
return "";
|
|
}
|
|
|
|
template<typename Stream>
|
|
std::string Reseeder::ReseedRequest (Stream& s, const std::string& uri)
|
|
{
|
|
boost::system::error_code ecode;
|
|
i2p::http::HTTPReq req;
|
|
req.uri = uri;
|
|
req.AddHeader("User-Agent", "Wget/1.11.4");
|
|
req.AddHeader("Connection", "close");
|
|
s.write_some (boost::asio::buffer (req.to_string()));
|
|
// read response
|
|
std::stringstream rs;
|
|
char recv_buf[1024]; size_t l = 0;
|
|
do {
|
|
l = s.read_some (boost::asio::buffer (recv_buf, sizeof(recv_buf)), ecode);
|
|
if (l) rs.write (recv_buf, l);
|
|
} while (!ecode && l);
|
|
// process response
|
|
std::string data = rs.str();
|
|
i2p::http::HTTPRes res;
|
|
int len = res.parse(data);
|
|
if (len <= 0) {
|
|
LogPrint(eLogWarning, "Reseed: Incomplete/broken response from ", uri);
|
|
return "";
|
|
}
|
|
if (res.code != 200) {
|
|
LogPrint(eLogError, "Reseed: Failed to reseed from ", uri, ", http code ", res.code);
|
|
return "";
|
|
}
|
|
data.erase(0, len); /* drop http headers from response */
|
|
LogPrint(eLogDebug, "Reseed: Got ", data.length(), " bytes of data from ", uri);
|
|
if (res.is_chunked()) {
|
|
std::stringstream in(data), out;
|
|
if (!i2p::http::MergeChunkedResponse(in, out)) {
|
|
LogPrint(eLogWarning, "Reseed: Failed to merge chunked response from ", uri);
|
|
return "";
|
|
}
|
|
LogPrint(eLogDebug, "Reseed: Got ", data.length(), "(", out.tellg(), ") bytes of data from ", uri);
|
|
data = out.str();
|
|
}
|
|
return data;
|
|
}
|
|
|
|
std::string Reseeder::YggdrasilRequest (const std::string& address)
|
|
{
|
|
i2p::http::URL url;
|
|
if (!url.parse(address))
|
|
{
|
|
LogPrint(eLogError, "Reseed: Failed to parse url: ", address);
|
|
return "";
|
|
}
|
|
url.schema = "http";
|
|
if (!url.port) url.port = 80;
|
|
|
|
boost::system::error_code ecode;
|
|
boost::asio::io_service service;
|
|
boost::asio::ip::tcp::socket s(service, boost::asio::ip::tcp::v6());
|
|
|
|
if (url.host.length () < 2) return ""; // assume []
|
|
auto host = url.host.substr (1, url.host.length () - 2);
|
|
LogPrint (eLogDebug, "Reseed: Connecting to Yggdrasil ", url.host, ":", url.port);
|
|
s.connect (boost::asio::ip::tcp::endpoint (boost::asio::ip::address_v6::from_string (host), url.port), ecode);
|
|
if (!ecode)
|
|
{
|
|
LogPrint (eLogDebug, "Reseed: Connected to Yggdrasil ", url.host, ":", url.port);
|
|
return ReseedRequest (s, url.to_string());
|
|
}
|
|
else
|
|
LogPrint (eLogError, "Reseed: Couldn't connect to Yggdrasil ", url.host, ": ", ecode.message ());
|
|
|
|
return "";
|
|
}
|
|
}
|
|
}
|