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686 lines
18 KiB
C++
686 lines
18 KiB
C++
#include <stdio.h>
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#include <string.h>
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#include "I2PEndian.h"
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#include <fstream>
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#include <boost/lexical_cast.hpp>
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#include "Crypto.h"
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#include "Base.h"
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#include "Timestamp.h"
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#include "Log.h"
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#include "RouterInfo.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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RouterInfo::RouterInfo (const std::string& fullPath):
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m_FullPath (fullPath), m_IsUpdated (false), m_IsUnreachable (false),
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m_SupportedTransports (0), m_Caps (0)
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{
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m_Buffer = new uint8_t[MAX_RI_BUFFER_SIZE];
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ReadFromFile ();
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}
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RouterInfo::RouterInfo (const uint8_t * buf, int len):
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m_IsUpdated (true), m_IsUnreachable (false), m_SupportedTransports (0), m_Caps (0)
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{
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m_Buffer = new uint8_t[MAX_RI_BUFFER_SIZE];
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memcpy (m_Buffer, buf, len);
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m_BufferLen = len;
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ReadFromBuffer (true);
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}
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RouterInfo::~RouterInfo ()
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{
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delete[] m_Buffer;
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}
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void RouterInfo::Update (const uint8_t * buf, int len)
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{
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// verify signature since we have indentity already
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int l = len - m_RouterIdentity->GetSignatureLen ();
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if (m_RouterIdentity->Verify (buf, l, buf + l))
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{
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// clean up
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m_IsUpdated = true;
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m_IsUnreachable = false;
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m_SupportedTransports = 0;
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m_Caps = 0;
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m_Addresses.clear ();
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m_Properties.clear ();
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// copy buffer
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if (!m_Buffer)
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m_Buffer = new uint8_t[MAX_RI_BUFFER_SIZE];
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memcpy (m_Buffer, buf, len);
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m_BufferLen = len;
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// skip identity
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size_t identityLen = m_RouterIdentity->GetFullLen ();
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// read new RI
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std::stringstream str (std::string ((char *)m_Buffer + identityLen, m_BufferLen - identityLen));
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ReadFromStream (str);
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// don't delete buffer until saved to the file
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}
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else
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{
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LogPrint (eLogError, "RouterInfo: signature verification failed");
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m_IsUnreachable = true;
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}
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}
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void RouterInfo::SetRouterIdentity (std::shared_ptr<const IdentityEx> identity)
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{
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m_RouterIdentity = identity;
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m_Timestamp = i2p::util::GetMillisecondsSinceEpoch ();
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}
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bool RouterInfo::LoadFile ()
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{
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std::ifstream s(m_FullPath.c_str (), 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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m_BufferLen = s.tellg ();
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if (m_BufferLen < 40)
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{
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LogPrint(eLogError, "RouterInfo: File", m_FullPath, " is malformed");
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return false;
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}
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s.seekg(0, std::ios::beg);
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if (!m_Buffer)
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m_Buffer = new uint8_t[MAX_RI_BUFFER_SIZE];
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s.read((char *)m_Buffer, m_BufferLen);
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}
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else
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{
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LogPrint (eLogError, "RouterInfo: Can't open file ", m_FullPath);
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return false;
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}
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return true;
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}
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void RouterInfo::ReadFromFile ()
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{
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if (LoadFile ())
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ReadFromBuffer (false);
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}
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void RouterInfo::ReadFromBuffer (bool verifySignature)
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{
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m_RouterIdentity = std::make_shared<IdentityEx>(m_Buffer, m_BufferLen);
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size_t identityLen = m_RouterIdentity->GetFullLen ();
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std::stringstream str (std::string ((char *)m_Buffer + identityLen, m_BufferLen - identityLen));
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ReadFromStream (str);
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if (verifySignature)
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{
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// verify signature
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int l = m_BufferLen - m_RouterIdentity->GetSignatureLen ();
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if (!m_RouterIdentity->Verify ((uint8_t *)m_Buffer, l, (uint8_t *)m_Buffer + l))
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{
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LogPrint (eLogError, "RouterInfo: signature verification failed");
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m_IsUnreachable = true;
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}
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m_RouterIdentity->DropVerifier ();
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}
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}
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void RouterInfo::ReadFromStream (std::istream& s)
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{
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s.read ((char *)&m_Timestamp, sizeof (m_Timestamp));
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m_Timestamp = be64toh (m_Timestamp);
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// read addresses
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uint8_t numAddresses;
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s.read ((char *)&numAddresses, sizeof (numAddresses));
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bool introducers = false;
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for (int i = 0; i < numAddresses; i++)
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{
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bool isValidAddress = true;
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Address address;
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s.read ((char *)&address.cost, sizeof (address.cost));
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s.read ((char *)&address.date, sizeof (address.date));
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char transportStyle[5];
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ReadString (transportStyle, s);
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if (!strcmp (transportStyle, "NTCP"))
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address.transportStyle = eTransportNTCP;
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else if (!strcmp (transportStyle, "SSU"))
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address.transportStyle = eTransportSSU;
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else
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address.transportStyle = eTransportUnknown;
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address.port = 0;
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address.mtu = 0;
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uint16_t size, r = 0;
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s.read ((char *)&size, sizeof (size));
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size = be16toh (size);
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while (r < size)
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{
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char key[500], value[500];
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r += ReadString (key, s);
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s.seekg (1, std::ios_base::cur); r++; // =
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r += ReadString (value, s);
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s.seekg (1, std::ios_base::cur); r++; // ;
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if (!strcmp (key, "host"))
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{
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boost::system::error_code ecode;
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address.host = boost::asio::ip::address::from_string (value, ecode);
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if (ecode)
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{
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if (address.transportStyle == eTransportNTCP)
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{
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m_SupportedTransports |= eNTCPV4; // TODO:
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address.addressString = value;
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}
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else
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{
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m_SupportedTransports |= eSSUV4; // TODO:
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address.addressString = value;
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}
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}
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else
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{
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// add supported protocol
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if (address.host.is_v4 ())
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m_SupportedTransports |= (address.transportStyle == eTransportNTCP) ? eNTCPV4 : eSSUV4;
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else
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m_SupportedTransports |= (address.transportStyle == eTransportNTCP) ? eNTCPV6 : eSSUV6;
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}
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}
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else if (!strcmp (key, "port"))
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address.port = boost::lexical_cast<int>(value);
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else if (!strcmp (key, "mtu"))
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address.mtu = boost::lexical_cast<int>(value);
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else if (!strcmp (key, "key"))
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Base64ToByteStream (value, strlen (value), address.key, 32);
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else if (!strcmp (key, "caps"))
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ExtractCaps (value);
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else if (key[0] == 'i')
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{
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// introducers
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introducers = true;
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size_t l = strlen(key);
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unsigned char index = key[l-1] - '0'; // TODO:
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key[l-1] = 0;
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if (index >= address.introducers.size ())
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address.introducers.resize (index + 1);
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Introducer& introducer = address.introducers.at (index);
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if (!strcmp (key, "ihost"))
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{
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boost::system::error_code ecode;
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introducer.iHost = boost::asio::ip::address::from_string (value, ecode);
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}
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else if (!strcmp (key, "iport"))
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introducer.iPort = boost::lexical_cast<int>(value);
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else if (!strcmp (key, "itag"))
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introducer.iTag = boost::lexical_cast<uint32_t>(value);
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else if (!strcmp (key, "ikey"))
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Base64ToByteStream (value, strlen (value), introducer.iKey, 32);
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}
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}
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if (isValidAddress)
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m_Addresses.push_back(address);
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}
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// read peers
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uint8_t numPeers;
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s.read ((char *)&numPeers, sizeof (numPeers));
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s.seekg (numPeers*32, std::ios_base::cur); // TODO: read peers
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// read properties
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uint16_t size, r = 0;
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s.read ((char *)&size, sizeof (size));
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size = be16toh (size);
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while (r < size)
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{
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#ifdef _WIN32
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char key[500], value[500];
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// TODO: investigate why properties get read as one long string under Windows
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// length should not be more than 44
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#else
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char key[50], value[50];
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#endif
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r += ReadString (key, s);
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s.seekg (1, std::ios_base::cur); r++; // =
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r += ReadString (value, s);
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s.seekg (1, std::ios_base::cur); r++; // ;
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m_Properties[key] = value;
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// extract caps
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if (!strcmp (key, "caps"))
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ExtractCaps (value);
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}
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if (!m_SupportedTransports || !m_Addresses.size() || (UsesIntroducer () && !introducers))
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SetUnreachable (true);
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}
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void RouterInfo::ExtractCaps (const char * value)
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{
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const char * cap = value;
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while (*cap)
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{
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switch (*cap)
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{
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case CAPS_FLAG_FLOODFILL:
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m_Caps |= Caps::eFloodfill;
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break;
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case CAPS_FLAG_HIGH_BANDWIDTH1:
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case CAPS_FLAG_HIGH_BANDWIDTH2:
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case CAPS_FLAG_HIGH_BANDWIDTH3:
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m_Caps |= Caps::eHighBandwidth;
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break;
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case CAPS_FLAG_EXTRA_BANDWIDTH1:
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case CAPS_FLAG_EXTRA_BANDWIDTH2:
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m_Caps |= Caps::eExtraBandwidth;
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break;
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case CAPS_FLAG_HIDDEN:
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m_Caps |= Caps::eHidden;
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break;
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case CAPS_FLAG_REACHABLE:
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m_Caps |= Caps::eReachable;
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break;
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case CAPS_FLAG_UNREACHABLE:
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m_Caps |= Caps::eUnreachable;
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break;
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case CAPS_FLAG_SSU_TESTING:
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m_Caps |= Caps::eSSUTesting;
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break;
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case CAPS_FLAG_SSU_INTRODUCER:
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m_Caps |= Caps::eSSUIntroducer;
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break;
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default: ;
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}
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cap++;
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}
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}
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void RouterInfo::UpdateCapsProperty ()
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{
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std::string caps;
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if (m_Caps & eFloodfill)
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{
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if (m_Caps & eExtraBandwidth) caps += CAPS_FLAG_EXTRA_BANDWIDTH1; // 'P'
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caps += CAPS_FLAG_HIGH_BANDWIDTH3; // 'O'
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caps += CAPS_FLAG_FLOODFILL; // floodfill
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}
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else
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{
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if (m_Caps & eExtraBandwidth) caps += CAPS_FLAG_EXTRA_BANDWIDTH1;
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caps += (m_Caps & eHighBandwidth) ? CAPS_FLAG_HIGH_BANDWIDTH3 : CAPS_FLAG_LOW_BANDWIDTH2; // bandwidth
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}
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if (m_Caps & eHidden) caps += CAPS_FLAG_HIDDEN; // hidden
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if (m_Caps & eReachable) caps += CAPS_FLAG_REACHABLE; // reachable
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if (m_Caps & eUnreachable) caps += CAPS_FLAG_UNREACHABLE; // unreachable
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SetProperty ("caps", caps.c_str ());
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}
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void RouterInfo::WriteToStream (std::ostream& s)
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{
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uint64_t ts = htobe64 (m_Timestamp);
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s.write ((char *)&ts, sizeof (ts));
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// addresses
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uint8_t numAddresses = m_Addresses.size ();
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s.write ((char *)&numAddresses, sizeof (numAddresses));
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for (auto& address : m_Addresses)
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{
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s.write ((char *)&address.cost, sizeof (address.cost));
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s.write ((char *)&address.date, sizeof (address.date));
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std::stringstream properties;
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if (address.transportStyle == eTransportNTCP)
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WriteString ("NTCP", s);
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else if (address.transportStyle == eTransportSSU)
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{
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WriteString ("SSU", s);
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// caps
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WriteString ("caps", properties);
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properties << '=';
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std::string caps;
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if (IsPeerTesting ()) caps += CAPS_FLAG_SSU_TESTING;
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if (IsIntroducer ()) caps += CAPS_FLAG_SSU_INTRODUCER;
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WriteString (caps, properties);
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properties << ';';
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}
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else
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WriteString ("", s);
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WriteString ("host", properties);
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properties << '=';
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WriteString (address.host.to_string (), properties);
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properties << ';';
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if (address.transportStyle == eTransportSSU)
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{
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// write introducers if any
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if (address.introducers.size () > 0)
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{
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int i = 0;
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for (auto introducer: address.introducers)
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{
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WriteString ("ihost" + boost::lexical_cast<std::string>(i), properties);
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properties << '=';
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WriteString (introducer.iHost.to_string (), properties);
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properties << ';';
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i++;
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}
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i = 0;
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for (auto introducer: address.introducers)
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{
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WriteString ("ikey" + boost::lexical_cast<std::string>(i), properties);
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properties << '=';
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char value[64];
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size_t l = ByteStreamToBase64 (introducer.iKey, 32, value, 64);
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value[l] = 0;
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WriteString (value, properties);
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properties << ';';
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i++;
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}
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i = 0;
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for (auto introducer: address.introducers)
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{
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WriteString ("iport" + boost::lexical_cast<std::string>(i), properties);
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properties << '=';
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WriteString (boost::lexical_cast<std::string>(introducer.iPort), properties);
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properties << ';';
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i++;
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}
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i = 0;
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for (auto introducer: address.introducers)
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{
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WriteString ("itag" + boost::lexical_cast<std::string>(i), properties);
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properties << '=';
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WriteString (boost::lexical_cast<std::string>(introducer.iTag), properties);
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properties << ';';
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i++;
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}
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}
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// write intro key
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WriteString ("key", properties);
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properties << '=';
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char value[64];
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size_t l = ByteStreamToBase64 (address.key, 32, value, 64);
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value[l] = 0;
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WriteString (value, properties);
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properties << ';';
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// write mtu
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if (address.mtu)
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{
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WriteString ("mtu", properties);
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properties << '=';
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WriteString (boost::lexical_cast<std::string>(address.mtu), properties);
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properties << ';';
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}
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}
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WriteString ("port", properties);
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properties << '=';
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WriteString (boost::lexical_cast<std::string>(address.port), properties);
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properties << ';';
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uint16_t size = htobe16 (properties.str ().size ());
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s.write ((char *)&size, sizeof (size));
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s.write (properties.str ().c_str (), properties.str ().size ());
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}
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// peers
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uint8_t numPeers = 0;
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s.write ((char *)&numPeers, sizeof (numPeers));
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// properties
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std::stringstream properties;
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for (auto& p : m_Properties)
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{
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WriteString (p.first, properties);
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properties << '=';
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WriteString (p.second, properties);
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properties << ';';
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}
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uint16_t size = htobe16 (properties.str ().size ());
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s.write ((char *)&size, sizeof (size));
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s.write (properties.str ().c_str (), properties.str ().size ());
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}
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const uint8_t * RouterInfo::LoadBuffer ()
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{
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if (!m_Buffer)
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{
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if (LoadFile ())
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LogPrint (eLogDebug, "RouterInfo: Buffer for ", GetIdentHashAbbreviation (GetIdentHash ()), " loaded from file");
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}
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return m_Buffer;
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}
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void RouterInfo::CreateBuffer (const PrivateKeys& privateKeys)
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{
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m_Timestamp = i2p::util::GetMillisecondsSinceEpoch (); // refresh timstamp
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std::stringstream s;
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uint8_t ident[1024];
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auto identLen = privateKeys.GetPublic ()->ToBuffer (ident, 1024);
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s.write ((char *)ident, identLen);
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WriteToStream (s);
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m_BufferLen = s.str ().size ();
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if (!m_Buffer)
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m_Buffer = new uint8_t[MAX_RI_BUFFER_SIZE];
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memcpy (m_Buffer, s.str ().c_str (), m_BufferLen);
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// signature
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privateKeys.Sign ((uint8_t *)m_Buffer, m_BufferLen, (uint8_t *)m_Buffer + m_BufferLen);
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m_BufferLen += privateKeys.GetPublic ()->GetSignatureLen ();
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}
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void RouterInfo::SaveToFile (const std::string& fullPath)
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{
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m_FullPath = fullPath;
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if (m_Buffer)
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{
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std::ofstream f (fullPath, std::ofstream::binary | std::ofstream::out);
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if (f.is_open ())
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f.write ((char *)m_Buffer, m_BufferLen);
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else
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LogPrint(eLogError, "RouterInfo: Can't save to ", fullPath);
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}
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else
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LogPrint (eLogError, "RouterInfo: Can't save, m_Buffer == NULL");
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}
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size_t RouterInfo::ReadString (char * str, std::istream& s)
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{
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uint8_t len;
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s.read ((char *)&len, 1);
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s.read (str, len);
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str[len] = 0;
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return len+1;
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}
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void RouterInfo::WriteString (const std::string& str, std::ostream& s)
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{
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uint8_t len = str.size ();
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s.write ((char *)&len, 1);
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s.write (str.c_str (), len);
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}
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void RouterInfo::AddNTCPAddress (const char * host, int port)
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{
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Address addr;
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addr.host = boost::asio::ip::address::from_string (host);
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addr.port = port;
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addr.transportStyle = eTransportNTCP;
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addr.cost = 2;
|
|
addr.date = 0;
|
|
addr.mtu = 0;
|
|
for (auto it: m_Addresses) // don't insert same address twice
|
|
if (it == addr) return;
|
|
m_Addresses.push_back(addr);
|
|
m_SupportedTransports |= addr.host.is_v6 () ? eNTCPV6 : eNTCPV4;
|
|
}
|
|
|
|
void RouterInfo::AddSSUAddress (const char * host, int port, const uint8_t * key, int mtu)
|
|
{
|
|
Address addr;
|
|
addr.host = boost::asio::ip::address::from_string (host);
|
|
addr.port = port;
|
|
addr.transportStyle = eTransportSSU;
|
|
addr.cost = 10; // NTCP should have priority over SSU
|
|
addr.date = 0;
|
|
addr.mtu = mtu;
|
|
memcpy (addr.key, key, 32);
|
|
for (auto it: m_Addresses) // don't insert same address twice
|
|
if (it == addr) return;
|
|
m_Addresses.push_back(addr);
|
|
m_SupportedTransports |= addr.host.is_v6 () ? eNTCPV6 : eSSUV4;
|
|
m_Caps |= eSSUTesting;
|
|
m_Caps |= eSSUIntroducer;
|
|
}
|
|
|
|
bool RouterInfo::AddIntroducer (const Introducer& introducer)
|
|
{
|
|
for (auto& addr : m_Addresses)
|
|
{
|
|
if (addr.transportStyle == eTransportSSU && addr.host.is_v4 ())
|
|
{
|
|
for (auto intro: addr.introducers)
|
|
if (intro.iTag == introducer.iTag) return false; // already presented
|
|
addr.introducers.push_back (introducer);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RouterInfo::RemoveIntroducer (const boost::asio::ip::udp::endpoint& e)
|
|
{
|
|
for (auto& addr : m_Addresses)
|
|
{
|
|
if (addr.transportStyle == eTransportSSU && addr.host.is_v4 ())
|
|
{
|
|
for (std::vector<Introducer>::iterator it = addr.introducers.begin (); it != addr.introducers.end (); it++)
|
|
if ( boost::asio::ip::udp::endpoint (it->iHost, it->iPort) == e)
|
|
{
|
|
addr.introducers.erase (it);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void RouterInfo::SetCaps (uint8_t caps)
|
|
{
|
|
m_Caps = caps;
|
|
UpdateCapsProperty ();
|
|
}
|
|
|
|
void RouterInfo::SetCaps (const char * caps)
|
|
{
|
|
SetProperty ("caps", caps);
|
|
m_Caps = 0;
|
|
ExtractCaps (caps);
|
|
}
|
|
|
|
void RouterInfo::SetProperty (const std::string& key, const std::string& value)
|
|
{
|
|
m_Properties[key] = value;
|
|
}
|
|
|
|
void RouterInfo::DeleteProperty (const std::string& key)
|
|
{
|
|
m_Properties.erase (key);
|
|
}
|
|
|
|
bool RouterInfo::IsFloodfill () const
|
|
{
|
|
return m_Caps & Caps::eFloodfill;
|
|
}
|
|
|
|
bool RouterInfo::IsNTCP (bool v4only) const
|
|
{
|
|
if (v4only)
|
|
return m_SupportedTransports & eNTCPV4;
|
|
else
|
|
return m_SupportedTransports & (eNTCPV4 | eNTCPV6);
|
|
}
|
|
|
|
bool RouterInfo::IsSSU (bool v4only) const
|
|
{
|
|
if (v4only)
|
|
return m_SupportedTransports & eSSUV4;
|
|
else
|
|
return m_SupportedTransports & (eSSUV4 | eSSUV6);
|
|
}
|
|
|
|
bool RouterInfo::IsV6 () const
|
|
{
|
|
return m_SupportedTransports & (eNTCPV6 | eSSUV6);
|
|
}
|
|
|
|
void RouterInfo::EnableV6 ()
|
|
{
|
|
if (!IsV6 ())
|
|
m_SupportedTransports |= eNTCPV6 | eSSUV6;
|
|
}
|
|
|
|
void RouterInfo::DisableV6 ()
|
|
{
|
|
if (IsV6 ())
|
|
{
|
|
// NTCP
|
|
m_SupportedTransports &= ~eNTCPV6;
|
|
for (size_t i = 0; i < m_Addresses.size (); i++)
|
|
{
|
|
if (m_Addresses[i].transportStyle == i2p::data::RouterInfo::eTransportNTCP &&
|
|
m_Addresses[i].host.is_v6 ())
|
|
{
|
|
m_Addresses.erase (m_Addresses.begin () + i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// SSU
|
|
m_SupportedTransports &= ~eSSUV6;
|
|
for (size_t i = 0; i < m_Addresses.size (); i++)
|
|
{
|
|
if (m_Addresses[i].transportStyle == i2p::data::RouterInfo::eTransportSSU &&
|
|
m_Addresses[i].host.is_v6 ())
|
|
{
|
|
m_Addresses.erase (m_Addresses.begin () + i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool RouterInfo::UsesIntroducer () const
|
|
{
|
|
return m_Caps & Caps::eUnreachable; // non-reachable
|
|
}
|
|
|
|
const RouterInfo::Address * RouterInfo::GetNTCPAddress (bool v4only) const
|
|
{
|
|
return GetAddress (eTransportNTCP, v4only);
|
|
}
|
|
|
|
const RouterInfo::Address * RouterInfo::GetSSUAddress (bool v4only) const
|
|
{
|
|
return GetAddress (eTransportSSU, v4only);
|
|
}
|
|
|
|
const RouterInfo::Address * RouterInfo::GetSSUV6Address () const
|
|
{
|
|
return GetAddress (eTransportSSU, false, true);
|
|
}
|
|
|
|
const RouterInfo::Address * RouterInfo::GetAddress (TransportStyle s, bool v4only, bool v6only) const
|
|
{
|
|
for (auto& address : m_Addresses)
|
|
{
|
|
if (address.transportStyle == s)
|
|
{
|
|
if ((!v4only || address.host.is_v4 ()) && (!v6only || address.host.is_v6 ()))
|
|
return &address;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
std::shared_ptr<RouterProfile> RouterInfo::GetProfile () const
|
|
{
|
|
if (!m_Profile)
|
|
m_Profile = GetRouterProfile (GetIdentHash ());
|
|
return m_Profile;
|
|
}
|
|
}
|
|
}
|