diff options
Diffstat (limited to 'src/netaddress.cpp')
-rw-r--r-- | src/netaddress.cpp | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/src/netaddress.cpp b/src/netaddress.cpp index eab7bfdb8e..bc1915aad9 100644 --- a/src/netaddress.cpp +++ b/src/netaddress.cpp @@ -10,7 +10,6 @@ #include <hash.h> #include <prevector.h> #include <tinyformat.h> -#include <util/asmap.h> #include <util/strencodings.h> #include <util/string.h> @@ -722,113 +721,6 @@ Network CNetAddr::GetNetClass() const return m_net; } -uint32_t CNetAddr::GetMappedAS(const std::vector<bool> &m_asmap) const { - const CNetAddr& address = *this; - uint32_t net_class = address.GetNetClass(); - if (m_asmap.size() == 0 || (net_class != NET_IPV4 && net_class != NET_IPV6)) { - return 0; // Indicates not found, safe because AS0 is reserved per RFC7607. - } - std::vector<bool> ip_bits(128); - if (address.HasLinkedIPv4()) { - // For lookup, treat as if it was just an IPv4 address (IPV4_IN_IPV6_PREFIX + IPv4 bits) - for (int8_t byte_i = 0; byte_i < 12; ++byte_i) { - for (uint8_t bit_i = 0; bit_i < 8; ++bit_i) { - ip_bits[byte_i * 8 + bit_i] = (IPV4_IN_IPV6_PREFIX[byte_i] >> (7 - bit_i)) & 1; - } - } - uint32_t ipv4 = address.GetLinkedIPv4(); - for (int i = 0; i < 32; ++i) { - ip_bits[96 + i] = (ipv4 >> (31 - i)) & 1; - } - } else { - // Use all 128 bits of the IPv6 address otherwise - assert(address.IsIPv6()); - auto addr_bytes = address.GetAddrBytes(); - for (int8_t byte_i = 0; byte_i < 16; ++byte_i) { - uint8_t cur_byte = addr_bytes[byte_i]; - for (uint8_t bit_i = 0; bit_i < 8; ++bit_i) { - ip_bits[byte_i * 8 + bit_i] = (cur_byte >> (7 - bit_i)) & 1; - } - } - } - uint32_t mapped_as = Interpret(m_asmap, ip_bits); - return mapped_as; -} - -/** - * Get the canonical identifier of our network group - * - * The groups are assigned in a way where it should be costly for an attacker to - * obtain addresses with many different group identifiers, even if it is cheap - * to obtain addresses with the same identifier. - * - * @note No two connections will be attempted to addresses with the same network - * group. - */ -std::vector<unsigned char> CNetAddr::GetGroup(const std::vector<bool> &m_asmap) const -{ - const CNetAddr& address = *this; - std::vector<unsigned char> vchRet; - // If non-empty asmap is supplied and the address is IPv4/IPv6, - // return ASN to be used for bucketing. - uint32_t asn = GetMappedAS(m_asmap); - if (asn != 0) { // Either asmap was empty, or address has non-asmappable net class (e.g. TOR). - vchRet.push_back(NET_IPV6); // IPv4 and IPv6 with same ASN should be in the same bucket - for (int i = 0; i < 4; i++) { - vchRet.push_back((asn >> (8 * i)) & 0xFF); - } - return vchRet; - } - - vchRet.push_back(address.GetNetClass()); - int nStartByte{0}; - int nBits{0}; - - if (address.IsLocal()) { - // all local addresses belong to the same group - } else if (address.IsInternal()) { - // All internal-usage addresses get their own group. - // Skip over the INTERNAL_IN_IPV6_PREFIX returned by CAddress::GetAddrBytes(). - nStartByte = INTERNAL_IN_IPV6_PREFIX.size(); - nBits = ADDR_INTERNAL_SIZE * 8; - } else if (!address.IsRoutable()) { - // all other unroutable addresses belong to the same group - } else if (address.HasLinkedIPv4()) { - // IPv4 addresses (and mapped IPv4 addresses) use /16 groups - uint32_t ipv4 = address.GetLinkedIPv4(); - vchRet.push_back((ipv4 >> 24) & 0xFF); - vchRet.push_back((ipv4 >> 16) & 0xFF); - return vchRet; - } else if (address.IsTor() || address.IsI2P()) { - nBits = 4; - } else if (address.IsCJDNS()) { - // Treat in the same way as Tor and I2P because the address in all of - // them is "random" bytes (derived from a public key). However in CJDNS - // the first byte is a constant 0xfc, so the random bytes come after it. - // Thus skip the constant 8 bits at the start. - nBits = 12; - } else if (address.IsHeNet()) { - // for he.net, use /36 groups - nBits = 36; - } else { - // for the rest of the IPv6 network, use /32 groups - nBits = 32; - } - - // Push our address onto vchRet. - auto addr_bytes = address.GetAddrBytes(); - const size_t num_bytes = nBits / 8; - vchRet.insert(vchRet.end(), addr_bytes.begin() + nStartByte, addr_bytes.begin() + nStartByte + num_bytes); - nBits %= 8; - // ...for the last byte, push nBits and for the rest of the byte push 1's - if (nBits > 0) { - assert(num_bytes < addr_bytes.size()); - vchRet.push_back(addr_bytes[num_bytes] | ((1 << (8 - nBits)) - 1)); - } - - return vchRet; -} - std::vector<unsigned char> CNetAddr::GetAddrBytes() const { if (IsAddrV1Compatible()) { |