diff --git a/src/Makefile.am b/src/Makefile.am index e3eaacdb4..0a35a052c 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -106,6 +106,7 @@ BITCOIN_CORE_H = \ miner.h \ net.h \ netbase.h \ + netaddress.h \ noui.h \ policy/fees.h \ policy/policy.h \ @@ -289,6 +290,7 @@ libbitcoin_common_a_SOURCES = \ core_write.cpp \ key.cpp \ keystore.cpp \ + netaddress.cpp \ netbase.cpp \ protocol.cpp \ scheduler.cpp \ diff --git a/src/netaddress.cpp b/src/netaddress.cpp new file mode 100644 index 000000000..7000ce3f0 --- /dev/null +++ b/src/netaddress.cpp @@ -0,0 +1,716 @@ +// Copyright (c) 2009-2010 Satoshi Nakamoto +// Copyright (c) 2009-2015 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#ifdef HAVE_CONFIG_H +#include "config/bitcoin-config.h" +#endif + +#include "netaddress.h" +#include "hash.h" +#include "utilstrencodings.h" +#include "tinyformat.h" + +static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff }; +static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43}; + +void CNetAddr::Init() +{ + memset(ip, 0, sizeof(ip)); + scopeId = 0; +} + +void CNetAddr::SetIP(const CNetAddr& ipIn) +{ + memcpy(ip, ipIn.ip, sizeof(ip)); +} + +void CNetAddr::SetRaw(Network network, const uint8_t *ip_in) +{ + switch(network) + { + case NET_IPV4: + memcpy(ip, pchIPv4, 12); + memcpy(ip+12, ip_in, 4); + break; + case NET_IPV6: + memcpy(ip, ip_in, 16); + break; + default: + assert(!"invalid network"); + } +} + +bool CNetAddr::SetSpecial(const std::string &strName) +{ + if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") { + std::vector vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str()); + if (vchAddr.size() != 16-sizeof(pchOnionCat)) + return false; + memcpy(ip, pchOnionCat, sizeof(pchOnionCat)); + for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++) + ip[i + sizeof(pchOnionCat)] = vchAddr[i]; + return true; + } + return false; +} + +CNetAddr::CNetAddr() +{ + Init(); +} + +CNetAddr::CNetAddr(const struct in_addr& ipv4Addr) +{ + SetRaw(NET_IPV4, (const uint8_t*)&ipv4Addr); +} + +CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr, const uint32_t scope) +{ + SetRaw(NET_IPV6, (const uint8_t*)&ipv6Addr); + scopeId = scope; +} + +unsigned int CNetAddr::GetByte(int n) const +{ + return ip[15-n]; +} + +bool CNetAddr::IsIPv4() const +{ + return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0); +} + +bool CNetAddr::IsIPv6() const +{ + return (!IsIPv4() && !IsTor()); +} + +bool CNetAddr::IsRFC1918() const +{ + return IsIPv4() && ( + GetByte(3) == 10 || + (GetByte(3) == 192 && GetByte(2) == 168) || + (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31))); +} + +bool CNetAddr::IsRFC2544() const +{ + return IsIPv4() && GetByte(3) == 198 && (GetByte(2) == 18 || GetByte(2) == 19); +} + +bool CNetAddr::IsRFC3927() const +{ + return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254); +} + +bool CNetAddr::IsRFC6598() const +{ + return IsIPv4() && GetByte(3) == 100 && GetByte(2) >= 64 && GetByte(2) <= 127; +} + +bool CNetAddr::IsRFC5737() const +{ + return IsIPv4() && ((GetByte(3) == 192 && GetByte(2) == 0 && GetByte(1) == 2) || + (GetByte(3) == 198 && GetByte(2) == 51 && GetByte(1) == 100) || + (GetByte(3) == 203 && GetByte(2) == 0 && GetByte(1) == 113)); +} + +bool CNetAddr::IsRFC3849() const +{ + return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8; +} + +bool CNetAddr::IsRFC3964() const +{ + return (GetByte(15) == 0x20 && GetByte(14) == 0x02); +} + +bool CNetAddr::IsRFC6052() const +{ + static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0}; + return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0); +} + +bool CNetAddr::IsRFC4380() const +{ + return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0); +} + +bool CNetAddr::IsRFC4862() const +{ + static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0}; + return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0); +} + +bool CNetAddr::IsRFC4193() const +{ + return ((GetByte(15) & 0xFE) == 0xFC); +} + +bool CNetAddr::IsRFC6145() const +{ + static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0}; + return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0); +} + +bool CNetAddr::IsRFC4843() const +{ + return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10); +} + +bool CNetAddr::IsTor() const +{ + return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0); +} + +bool CNetAddr::IsLocal() const +{ + // IPv4 loopback + if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0)) + return true; + + // IPv6 loopback (::1/128) + static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}; + if (memcmp(ip, pchLocal, 16) == 0) + return true; + + return false; +} + +bool CNetAddr::IsMulticast() const +{ + return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0) + || (GetByte(15) == 0xFF); +} + +bool CNetAddr::IsValid() const +{ + // Cleanup 3-byte shifted addresses caused by garbage in size field + // of addr messages from versions before 0.2.9 checksum. + // Two consecutive addr messages look like this: + // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26... + // so if the first length field is garbled, it reads the second batch + // of addr misaligned by 3 bytes. + if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0) + return false; + + // unspecified IPv6 address (::/128) + unsigned char ipNone[16] = {}; + if (memcmp(ip, ipNone, 16) == 0) + return false; + + // documentation IPv6 address + if (IsRFC3849()) + return false; + + if (IsIPv4()) + { + // INADDR_NONE + uint32_t ipNone = INADDR_NONE; + if (memcmp(ip+12, &ipNone, 4) == 0) + return false; + + // 0 + ipNone = 0; + if (memcmp(ip+12, &ipNone, 4) == 0) + return false; + } + + return true; +} + +bool CNetAddr::IsRoutable() const +{ + return IsValid() && !(IsRFC1918() || IsRFC2544() || IsRFC3927() || IsRFC4862() || IsRFC6598() || IsRFC5737() || (IsRFC4193() && !IsTor()) || IsRFC4843() || IsLocal()); +} + +enum Network CNetAddr::GetNetwork() const +{ + if (!IsRoutable()) + return NET_UNROUTABLE; + + if (IsIPv4()) + return NET_IPV4; + + if (IsTor()) + return NET_TOR; + + return NET_IPV6; +} + +std::string CNetAddr::ToStringIP() const +{ + if (IsTor()) + return EncodeBase32(&ip[6], 10) + ".onion"; + CService serv(*this, 0); + struct sockaddr_storage sockaddr; + socklen_t socklen = sizeof(sockaddr); + if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) { + char name[1025] = ""; + if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST)) + return std::string(name); + } + if (IsIPv4()) + return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0)); + else + return strprintf("%x:%x:%x:%x:%x:%x:%x:%x", + GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12), + GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8), + GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4), + GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0)); +} + +std::string CNetAddr::ToString() const +{ + return ToStringIP(); +} + +bool operator==(const CNetAddr& a, const CNetAddr& b) +{ + return (memcmp(a.ip, b.ip, 16) == 0); +} + +bool operator!=(const CNetAddr& a, const CNetAddr& b) +{ + return (memcmp(a.ip, b.ip, 16) != 0); +} + +bool operator<(const CNetAddr& a, const CNetAddr& b) +{ + return (memcmp(a.ip, b.ip, 16) < 0); +} + +bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const +{ + if (!IsIPv4()) + return false; + memcpy(pipv4Addr, ip+12, 4); + return true; +} + +bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const +{ + memcpy(pipv6Addr, ip, 16); + return true; +} + +// get canonical identifier of an address' group +// no two connections will be attempted to addresses with the same group +std::vector CNetAddr::GetGroup() const +{ + std::vector vchRet; + int nClass = NET_IPV6; + int nStartByte = 0; + int nBits = 16; + + // all local addresses belong to the same group + if (IsLocal()) + { + nClass = 255; + nBits = 0; + } + + // all unroutable addresses belong to the same group + if (!IsRoutable()) + { + nClass = NET_UNROUTABLE; + nBits = 0; + } + // for IPv4 addresses, '1' + the 16 higher-order bits of the IP + // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix + else if (IsIPv4() || IsRFC6145() || IsRFC6052()) + { + nClass = NET_IPV4; + nStartByte = 12; + } + // for 6to4 tunnelled addresses, use the encapsulated IPv4 address + else if (IsRFC3964()) + { + nClass = NET_IPV4; + nStartByte = 2; + } + // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address + else if (IsRFC4380()) + { + vchRet.push_back(NET_IPV4); + vchRet.push_back(GetByte(3) ^ 0xFF); + vchRet.push_back(GetByte(2) ^ 0xFF); + return vchRet; + } + else if (IsTor()) + { + nClass = NET_TOR; + nStartByte = 6; + nBits = 4; + } + // for he.net, use /36 groups + else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70) + nBits = 36; + // for the rest of the IPv6 network, use /32 groups + else + nBits = 32; + + vchRet.push_back(nClass); + while (nBits >= 8) + { + vchRet.push_back(GetByte(15 - nStartByte)); + nStartByte++; + nBits -= 8; + } + if (nBits > 0) + vchRet.push_back(GetByte(15 - nStartByte) | ((1 << (8 - nBits)) - 1)); + + return vchRet; +} + +uint64_t CNetAddr::GetHash() const +{ + uint256 hash = Hash(&ip[0], &ip[16]); + uint64_t nRet; + memcpy(&nRet, &hash, sizeof(nRet)); + return nRet; +} + +// private extensions to enum Network, only returned by GetExtNetwork, +// and only used in GetReachabilityFrom +static const int NET_UNKNOWN = NET_MAX + 0; +static const int NET_TEREDO = NET_MAX + 1; +int static GetExtNetwork(const CNetAddr *addr) +{ + if (addr == NULL) + return NET_UNKNOWN; + if (addr->IsRFC4380()) + return NET_TEREDO; + return addr->GetNetwork(); +} + +/** Calculates a metric for how reachable (*this) is from a given partner */ +int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const +{ + enum Reachability { + REACH_UNREACHABLE, + REACH_DEFAULT, + REACH_TEREDO, + REACH_IPV6_WEAK, + REACH_IPV4, + REACH_IPV6_STRONG, + REACH_PRIVATE + }; + + if (!IsRoutable()) + return REACH_UNREACHABLE; + + int ourNet = GetExtNetwork(this); + int theirNet = GetExtNetwork(paddrPartner); + bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145(); + + switch(theirNet) { + case NET_IPV4: + switch(ourNet) { + default: return REACH_DEFAULT; + case NET_IPV4: return REACH_IPV4; + } + case NET_IPV6: + switch(ourNet) { + default: return REACH_DEFAULT; + case NET_TEREDO: return REACH_TEREDO; + case NET_IPV4: return REACH_IPV4; + case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled + } + case NET_TOR: + switch(ourNet) { + default: return REACH_DEFAULT; + case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well + case NET_TOR: return REACH_PRIVATE; + } + case NET_TEREDO: + switch(ourNet) { + default: return REACH_DEFAULT; + case NET_TEREDO: return REACH_TEREDO; + case NET_IPV6: return REACH_IPV6_WEAK; + case NET_IPV4: return REACH_IPV4; + } + case NET_UNKNOWN: + case NET_UNROUTABLE: + default: + switch(ourNet) { + default: return REACH_DEFAULT; + case NET_TEREDO: return REACH_TEREDO; + case NET_IPV6: return REACH_IPV6_WEAK; + case NET_IPV4: return REACH_IPV4; + case NET_TOR: return REACH_PRIVATE; // either from Tor, or don't care about our address + } + } +} + +void CService::Init() +{ + port = 0; +} + +CService::CService() +{ + Init(); +} + +CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn) +{ +} + +CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn) +{ +} + +CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn) +{ +} + +CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port)) +{ + assert(addr.sin_family == AF_INET); +} + +CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr, addr.sin6_scope_id), port(ntohs(addr.sin6_port)) +{ + assert(addr.sin6_family == AF_INET6); +} + +bool CService::SetSockAddr(const struct sockaddr *paddr) +{ + switch (paddr->sa_family) { + case AF_INET: + *this = CService(*(const struct sockaddr_in*)paddr); + return true; + case AF_INET6: + *this = CService(*(const struct sockaddr_in6*)paddr); + return true; + default: + return false; + } +} + +unsigned short CService::GetPort() const +{ + return port; +} + +bool operator==(const CService& a, const CService& b) +{ + return (CNetAddr)a == (CNetAddr)b && a.port == b.port; +} + +bool operator!=(const CService& a, const CService& b) +{ + return (CNetAddr)a != (CNetAddr)b || a.port != b.port; +} + +bool operator<(const CService& a, const CService& b) +{ + return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port); +} + +bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const +{ + if (IsIPv4()) { + if (*addrlen < (socklen_t)sizeof(struct sockaddr_in)) + return false; + *addrlen = sizeof(struct sockaddr_in); + struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr; + memset(paddrin, 0, *addrlen); + if (!GetInAddr(&paddrin->sin_addr)) + return false; + paddrin->sin_family = AF_INET; + paddrin->sin_port = htons(port); + return true; + } + if (IsIPv6()) { + if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6)) + return false; + *addrlen = sizeof(struct sockaddr_in6); + struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr; + memset(paddrin6, 0, *addrlen); + if (!GetIn6Addr(&paddrin6->sin6_addr)) + return false; + paddrin6->sin6_scope_id = scopeId; + paddrin6->sin6_family = AF_INET6; + paddrin6->sin6_port = htons(port); + return true; + } + return false; +} + +std::vector CService::GetKey() const +{ + std::vector vKey; + vKey.resize(18); + memcpy(&vKey[0], ip, 16); + vKey[16] = port / 0x100; + vKey[17] = port & 0x0FF; + return vKey; +} + +std::string CService::ToStringPort() const +{ + return strprintf("%u", port); +} + +std::string CService::ToStringIPPort() const +{ + if (IsIPv4() || IsTor()) { + return ToStringIP() + ":" + ToStringPort(); + } else { + return "[" + ToStringIP() + "]:" + ToStringPort(); + } +} + +std::string CService::ToString() const +{ + return ToStringIPPort(); +} + +void CService::SetPort(unsigned short portIn) +{ + port = portIn; +} + +CSubNet::CSubNet(): + valid(false) +{ + memset(netmask, 0, sizeof(netmask)); +} + +CSubNet::CSubNet(const CNetAddr &addr, int32_t mask) +{ + valid = true; + network = addr; + // Default to /32 (IPv4) or /128 (IPv6), i.e. match single address + memset(netmask, 255, sizeof(netmask)); + + // IPv4 addresses start at offset 12, and first 12 bytes must match, so just offset n + const int astartofs = network.IsIPv4() ? 12 : 0; + + int32_t n = mask; + if(n >= 0 && n <= (128 - astartofs*8)) // Only valid if in range of bits of address + { + n += astartofs*8; + // Clear bits [n..127] + for (; n < 128; ++n) + netmask[n>>3] &= ~(1<<(7-(n&7))); + } else + valid = false; + + // Normalize network according to netmask + for(int x=0; x<16; ++x) + network.ip[x] &= netmask[x]; +} + +CSubNet::CSubNet(const CNetAddr &addr, const CNetAddr &mask) +{ + valid = true; + network = addr; + // Default to /32 (IPv4) or /128 (IPv6), i.e. match single address + memset(netmask, 255, sizeof(netmask)); + + // IPv4 addresses start at offset 12, and first 12 bytes must match, so just offset n + const int astartofs = network.IsIPv4() ? 12 : 0; + + for(int x=astartofs; x<16; ++x) + netmask[x] = mask.ip[x]; + + // Normalize network according to netmask + for(int x=0; x<16; ++x) + network.ip[x] &= netmask[x]; +} + +CSubNet::CSubNet(const CNetAddr &addr): + valid(addr.IsValid()) +{ + memset(netmask, 255, sizeof(netmask)); + network = addr; +} + +bool CSubNet::Match(const CNetAddr &addr) const +{ + if (!valid || !addr.IsValid()) + return false; + for(int x=0; x<16; ++x) + if ((addr.ip[x] & netmask[x]) != network.ip[x]) + return false; + return true; +} + +static inline int NetmaskBits(uint8_t x) +{ + switch(x) { + case 0x00: return 0; break; + case 0x80: return 1; break; + case 0xc0: return 2; break; + case 0xe0: return 3; break; + case 0xf0: return 4; break; + case 0xf8: return 5; break; + case 0xfc: return 6; break; + case 0xfe: return 7; break; + case 0xff: return 8; break; + default: return -1; break; + } +} + +std::string CSubNet::ToString() const +{ + /* Parse binary 1{n}0{N-n} to see if mask can be represented as /n */ + int cidr = 0; + bool valid_cidr = true; + int n = network.IsIPv4() ? 12 : 0; + for (; n < 16 && netmask[n] == 0xff; ++n) + cidr += 8; + if (n < 16) { + int bits = NetmaskBits(netmask[n]); + if (bits < 0) + valid_cidr = false; + else + cidr += bits; + ++n; + } + for (; n < 16 && valid_cidr; ++n) + if (netmask[n] != 0x00) + valid_cidr = false; + + /* Format output */ + std::string strNetmask; + if (valid_cidr) { + strNetmask = strprintf("%u", cidr); + } else { + if (network.IsIPv4()) + strNetmask = strprintf("%u.%u.%u.%u", netmask[12], netmask[13], netmask[14], netmask[15]); + else + strNetmask = strprintf("%x:%x:%x:%x:%x:%x:%x:%x", + netmask[0] << 8 | netmask[1], netmask[2] << 8 | netmask[3], + netmask[4] << 8 | netmask[5], netmask[6] << 8 | netmask[7], + netmask[8] << 8 | netmask[9], netmask[10] << 8 | netmask[11], + netmask[12] << 8 | netmask[13], netmask[14] << 8 | netmask[15]); + } + + return network.ToString() + "/" + strNetmask; +} + +bool CSubNet::IsValid() const +{ + return valid; +} + +bool operator==(const CSubNet& a, const CSubNet& b) +{ + return a.valid == b.valid && a.network == b.network && !memcmp(a.netmask, b.netmask, 16); +} + +bool operator!=(const CSubNet& a, const CSubNet& b) +{ + return !(a==b); +} + +bool operator<(const CSubNet& a, const CSubNet& b) +{ + return (a.network < b.network || (a.network == b.network && memcmp(a.netmask, b.netmask, 16) < 0)); +} diff --git a/src/netaddress.h b/src/netaddress.h new file mode 100644 index 000000000..9330fe332 --- /dev/null +++ b/src/netaddress.h @@ -0,0 +1,171 @@ +// Copyright (c) 2009-2015 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#ifndef BITCOIN_NETADDRESS_H +#define BITCOIN_NETADDRESS_H + +#if defined(HAVE_CONFIG_H) +#include "config/bitcoin-config.h" +#endif + +#include "compat.h" +#include "serialize.h" + +#include +#include +#include + +enum Network +{ + NET_UNROUTABLE = 0, + NET_IPV4, + NET_IPV6, + NET_TOR, + + NET_MAX, +}; + +/** IP address (IPv6, or IPv4 using mapped IPv6 range (::FFFF:0:0/96)) */ +class CNetAddr +{ + protected: + unsigned char ip[16]; // in network byte order + uint32_t scopeId; // for scoped/link-local ipv6 addresses + + public: + CNetAddr(); + CNetAddr(const struct in_addr& ipv4Addr); + void Init(); + void SetIP(const CNetAddr& ip); + + /** + * Set raw IPv4 or IPv6 address (in network byte order) + * @note Only NET_IPV4 and NET_IPV6 are allowed for network. + */ + void SetRaw(Network network, const uint8_t *data); + + bool SetSpecial(const std::string &strName); // for Tor addresses + bool IsIPv4() const; // IPv4 mapped address (::FFFF:0:0/96, 0.0.0.0/0) + bool IsIPv6() const; // IPv6 address (not mapped IPv4, not Tor) + bool IsRFC1918() const; // IPv4 private networks (10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12) + bool IsRFC2544() const; // IPv4 inter-network communcations (192.18.0.0/15) + bool IsRFC6598() const; // IPv4 ISP-level NAT (100.64.0.0/10) + bool IsRFC5737() const; // IPv4 documentation addresses (192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24) + bool IsRFC3849() const; // IPv6 documentation address (2001:0DB8::/32) + bool IsRFC3927() const; // IPv4 autoconfig (169.254.0.0/16) + bool IsRFC3964() const; // IPv6 6to4 tunnelling (2002::/16) + bool IsRFC4193() const; // IPv6 unique local (FC00::/7) + bool IsRFC4380() const; // IPv6 Teredo tunnelling (2001::/32) + bool IsRFC4843() const; // IPv6 ORCHID (2001:10::/28) + bool IsRFC4862() const; // IPv6 autoconfig (FE80::/64) + bool IsRFC6052() const; // IPv6 well-known prefix (64:FF9B::/96) + bool IsRFC6145() const; // IPv6 IPv4-translated address (::FFFF:0:0:0/96) + bool IsTor() const; + bool IsLocal() const; + bool IsRoutable() const; + bool IsValid() const; + bool IsMulticast() const; + enum Network GetNetwork() const; + std::string ToString() const; + std::string ToStringIP() const; + unsigned int GetByte(int n) const; + uint64_t GetHash() const; + bool GetInAddr(struct in_addr* pipv4Addr) const; + std::vector GetGroup() const; + int GetReachabilityFrom(const CNetAddr *paddrPartner = NULL) const; + + CNetAddr(const struct in6_addr& pipv6Addr, const uint32_t scope = 0); + bool GetIn6Addr(struct in6_addr* pipv6Addr) const; + + friend bool operator==(const CNetAddr& a, const CNetAddr& b); + friend bool operator!=(const CNetAddr& a, const CNetAddr& b); + friend bool operator<(const CNetAddr& a, const CNetAddr& b); + + ADD_SERIALIZE_METHODS; + + template + inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { + READWRITE(FLATDATA(ip)); + } + + friend class CSubNet; +}; + +class CSubNet +{ + protected: + /// Network (base) address + CNetAddr network; + /// Netmask, in network byte order + uint8_t netmask[16]; + /// Is this value valid? (only used to signal parse errors) + bool valid; + + public: + CSubNet(); + CSubNet(const CNetAddr &addr, int32_t mask); + CSubNet(const CNetAddr &addr, const CNetAddr &mask); + + //constructor for single ip subnet (/32 or /128) + explicit CSubNet(const CNetAddr &addr); + + bool Match(const CNetAddr &addr) const; + + std::string ToString() const; + bool IsValid() const; + + friend bool operator==(const CSubNet& a, const CSubNet& b); + friend bool operator!=(const CSubNet& a, const CSubNet& b); + friend bool operator<(const CSubNet& a, const CSubNet& b); + + ADD_SERIALIZE_METHODS; + + template + inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { + READWRITE(network); + READWRITE(FLATDATA(netmask)); + READWRITE(FLATDATA(valid)); + } +}; + +/** A combination of a network address (CNetAddr) and a (TCP) port */ +class CService : public CNetAddr +{ + protected: + unsigned short port; // host order + + public: + CService(); + CService(const CNetAddr& ip, unsigned short port); + CService(const struct in_addr& ipv4Addr, unsigned short port); + CService(const struct sockaddr_in& addr); + void Init(); + void SetPort(unsigned short portIn); + unsigned short GetPort() const; + bool GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const; + bool SetSockAddr(const struct sockaddr* paddr); + friend bool operator==(const CService& a, const CService& b); + friend bool operator!=(const CService& a, const CService& b); + friend bool operator<(const CService& a, const CService& b); + std::vector GetKey() const; + std::string ToString() const; + std::string ToStringPort() const; + std::string ToStringIPPort() const; + + CService(const struct in6_addr& ipv6Addr, unsigned short port); + CService(const struct sockaddr_in6& addr); + + ADD_SERIALIZE_METHODS; + + template + inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { + READWRITE(FLATDATA(ip)); + unsigned short portN = htons(port); + READWRITE(FLATDATA(portN)); + if (ser_action.ForRead()) + port = ntohs(portN); + } +}; + +#endif // BITCOIN_NETADDRESS_H diff --git a/src/netbase.cpp b/src/netbase.cpp index 52badcd98..c2294a078 100644 --- a/src/netbase.cpp +++ b/src/netbase.cpp @@ -42,8 +42,6 @@ static CCriticalSection cs_proxyInfos; int nConnectTimeout = DEFAULT_CONNECT_TIMEOUT; bool fNameLookup = DEFAULT_NAME_LOOKUP; -static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff }; - // Need ample time for negotiation for very slow proxies such as Tor (milliseconds) static const int SOCKS5_RECV_TIMEOUT = 20 * 1000; @@ -646,618 +644,6 @@ bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest return ConnectThroughProxy(nameProxy, strDest, port, hSocketRet, nTimeout, outProxyConnectionFailed); } -void CNetAddr::Init() -{ - memset(ip, 0, sizeof(ip)); - scopeId = 0; -} - -void CNetAddr::SetIP(const CNetAddr& ipIn) -{ - memcpy(ip, ipIn.ip, sizeof(ip)); -} - -void CNetAddr::SetRaw(Network network, const uint8_t *ip_in) -{ - switch(network) - { - case NET_IPV4: - memcpy(ip, pchIPv4, 12); - memcpy(ip+12, ip_in, 4); - break; - case NET_IPV6: - memcpy(ip, ip_in, 16); - break; - default: - assert(!"invalid network"); - } -} - -static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43}; - -bool CNetAddr::SetSpecial(const std::string &strName) -{ - if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") { - std::vector vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str()); - if (vchAddr.size() != 16-sizeof(pchOnionCat)) - return false; - memcpy(ip, pchOnionCat, sizeof(pchOnionCat)); - for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++) - ip[i + sizeof(pchOnionCat)] = vchAddr[i]; - return true; - } - return false; -} - -CNetAddr::CNetAddr() -{ - Init(); -} - -CNetAddr::CNetAddr(const struct in_addr& ipv4Addr) -{ - SetRaw(NET_IPV4, (const uint8_t*)&ipv4Addr); -} - -CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr, const uint32_t scope) -{ - SetRaw(NET_IPV6, (const uint8_t*)&ipv6Addr); - scopeId = scope; -} - -unsigned int CNetAddr::GetByte(int n) const -{ - return ip[15-n]; -} - -bool CNetAddr::IsIPv4() const -{ - return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0); -} - -bool CNetAddr::IsIPv6() const -{ - return (!IsIPv4() && !IsTor()); -} - -bool CNetAddr::IsRFC1918() const -{ - return IsIPv4() && ( - GetByte(3) == 10 || - (GetByte(3) == 192 && GetByte(2) == 168) || - (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31))); -} - -bool CNetAddr::IsRFC2544() const -{ - return IsIPv4() && GetByte(3) == 198 && (GetByte(2) == 18 || GetByte(2) == 19); -} - -bool CNetAddr::IsRFC3927() const -{ - return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254); -} - -bool CNetAddr::IsRFC6598() const -{ - return IsIPv4() && GetByte(3) == 100 && GetByte(2) >= 64 && GetByte(2) <= 127; -} - -bool CNetAddr::IsRFC5737() const -{ - return IsIPv4() && ((GetByte(3) == 192 && GetByte(2) == 0 && GetByte(1) == 2) || - (GetByte(3) == 198 && GetByte(2) == 51 && GetByte(1) == 100) || - (GetByte(3) == 203 && GetByte(2) == 0 && GetByte(1) == 113)); -} - -bool CNetAddr::IsRFC3849() const -{ - return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8; -} - -bool CNetAddr::IsRFC3964() const -{ - return (GetByte(15) == 0x20 && GetByte(14) == 0x02); -} - -bool CNetAddr::IsRFC6052() const -{ - static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0}; - return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0); -} - -bool CNetAddr::IsRFC4380() const -{ - return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0); -} - -bool CNetAddr::IsRFC4862() const -{ - static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0}; - return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0); -} - -bool CNetAddr::IsRFC4193() const -{ - return ((GetByte(15) & 0xFE) == 0xFC); -} - -bool CNetAddr::IsRFC6145() const -{ - static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0}; - return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0); -} - -bool CNetAddr::IsRFC4843() const -{ - return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10); -} - -bool CNetAddr::IsTor() const -{ - return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0); -} - -bool CNetAddr::IsLocal() const -{ - // IPv4 loopback - if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0)) - return true; - - // IPv6 loopback (::1/128) - static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}; - if (memcmp(ip, pchLocal, 16) == 0) - return true; - - return false; -} - -bool CNetAddr::IsMulticast() const -{ - return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0) - || (GetByte(15) == 0xFF); -} - -bool CNetAddr::IsValid() const -{ - // Cleanup 3-byte shifted addresses caused by garbage in size field - // of addr messages from versions before 0.2.9 checksum. - // Two consecutive addr messages look like this: - // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26... - // so if the first length field is garbled, it reads the second batch - // of addr misaligned by 3 bytes. - if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0) - return false; - - // unspecified IPv6 address (::/128) - unsigned char ipNone[16] = {}; - if (memcmp(ip, ipNone, 16) == 0) - return false; - - // documentation IPv6 address - if (IsRFC3849()) - return false; - - if (IsIPv4()) - { - // INADDR_NONE - uint32_t ipNone = INADDR_NONE; - if (memcmp(ip+12, &ipNone, 4) == 0) - return false; - - // 0 - ipNone = 0; - if (memcmp(ip+12, &ipNone, 4) == 0) - return false; - } - - return true; -} - -bool CNetAddr::IsRoutable() const -{ - return IsValid() && !(IsRFC1918() || IsRFC2544() || IsRFC3927() || IsRFC4862() || IsRFC6598() || IsRFC5737() || (IsRFC4193() && !IsTor()) || IsRFC4843() || IsLocal()); -} - -enum Network CNetAddr::GetNetwork() const -{ - if (!IsRoutable()) - return NET_UNROUTABLE; - - if (IsIPv4()) - return NET_IPV4; - - if (IsTor()) - return NET_TOR; - - return NET_IPV6; -} - -std::string CNetAddr::ToStringIP() const -{ - if (IsTor()) - return EncodeBase32(&ip[6], 10) + ".onion"; - CService serv(*this, 0); - struct sockaddr_storage sockaddr; - socklen_t socklen = sizeof(sockaddr); - if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) { - char name[1025] = ""; - if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST)) - return std::string(name); - } - if (IsIPv4()) - return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0)); - else - return strprintf("%x:%x:%x:%x:%x:%x:%x:%x", - GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12), - GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8), - GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4), - GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0)); -} - -std::string CNetAddr::ToString() const -{ - return ToStringIP(); -} - -bool operator==(const CNetAddr& a, const CNetAddr& b) -{ - return (memcmp(a.ip, b.ip, 16) == 0); -} - -bool operator!=(const CNetAddr& a, const CNetAddr& b) -{ - return (memcmp(a.ip, b.ip, 16) != 0); -} - -bool operator<(const CNetAddr& a, const CNetAddr& b) -{ - return (memcmp(a.ip, b.ip, 16) < 0); -} - -bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const -{ - if (!IsIPv4()) - return false; - memcpy(pipv4Addr, ip+12, 4); - return true; -} - -bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const -{ - memcpy(pipv6Addr, ip, 16); - return true; -} - -// get canonical identifier of an address' group -// no two connections will be attempted to addresses with the same group -std::vector CNetAddr::GetGroup() const -{ - std::vector vchRet; - int nClass = NET_IPV6; - int nStartByte = 0; - int nBits = 16; - - // all local addresses belong to the same group - if (IsLocal()) - { - nClass = 255; - nBits = 0; - } - - // all unroutable addresses belong to the same group - if (!IsRoutable()) - { - nClass = NET_UNROUTABLE; - nBits = 0; - } - // for IPv4 addresses, '1' + the 16 higher-order bits of the IP - // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix - else if (IsIPv4() || IsRFC6145() || IsRFC6052()) - { - nClass = NET_IPV4; - nStartByte = 12; - } - // for 6to4 tunnelled addresses, use the encapsulated IPv4 address - else if (IsRFC3964()) - { - nClass = NET_IPV4; - nStartByte = 2; - } - // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address - else if (IsRFC4380()) - { - vchRet.push_back(NET_IPV4); - vchRet.push_back(GetByte(3) ^ 0xFF); - vchRet.push_back(GetByte(2) ^ 0xFF); - return vchRet; - } - else if (IsTor()) - { - nClass = NET_TOR; - nStartByte = 6; - nBits = 4; - } - // for he.net, use /36 groups - else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70) - nBits = 36; - // for the rest of the IPv6 network, use /32 groups - else - nBits = 32; - - vchRet.push_back(nClass); - while (nBits >= 8) - { - vchRet.push_back(GetByte(15 - nStartByte)); - nStartByte++; - nBits -= 8; - } - if (nBits > 0) - vchRet.push_back(GetByte(15 - nStartByte) | ((1 << (8 - nBits)) - 1)); - - return vchRet; -} - -uint64_t CNetAddr::GetHash() const -{ - uint256 hash = Hash(&ip[0], &ip[16]); - uint64_t nRet; - memcpy(&nRet, &hash, sizeof(nRet)); - return nRet; -} - -// private extensions to enum Network, only returned by GetExtNetwork, -// and only used in GetReachabilityFrom -static const int NET_UNKNOWN = NET_MAX + 0; -static const int NET_TEREDO = NET_MAX + 1; -int static GetExtNetwork(const CNetAddr *addr) -{ - if (addr == NULL) - return NET_UNKNOWN; - if (addr->IsRFC4380()) - return NET_TEREDO; - return addr->GetNetwork(); -} - -/** Calculates a metric for how reachable (*this) is from a given partner */ -int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const -{ - enum Reachability { - REACH_UNREACHABLE, - REACH_DEFAULT, - REACH_TEREDO, - REACH_IPV6_WEAK, - REACH_IPV4, - REACH_IPV6_STRONG, - REACH_PRIVATE - }; - - if (!IsRoutable()) - return REACH_UNREACHABLE; - - int ourNet = GetExtNetwork(this); - int theirNet = GetExtNetwork(paddrPartner); - bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145(); - - switch(theirNet) { - case NET_IPV4: - switch(ourNet) { - default: return REACH_DEFAULT; - case NET_IPV4: return REACH_IPV4; - } - case NET_IPV6: - switch(ourNet) { - default: return REACH_DEFAULT; - case NET_TEREDO: return REACH_TEREDO; - case NET_IPV4: return REACH_IPV4; - case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled - } - case NET_TOR: - switch(ourNet) { - default: return REACH_DEFAULT; - case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well - case NET_TOR: return REACH_PRIVATE; - } - case NET_TEREDO: - switch(ourNet) { - default: return REACH_DEFAULT; - case NET_TEREDO: return REACH_TEREDO; - case NET_IPV6: return REACH_IPV6_WEAK; - case NET_IPV4: return REACH_IPV4; - } - case NET_UNKNOWN: - case NET_UNROUTABLE: - default: - switch(ourNet) { - default: return REACH_DEFAULT; - case NET_TEREDO: return REACH_TEREDO; - case NET_IPV6: return REACH_IPV6_WEAK; - case NET_IPV4: return REACH_IPV4; - case NET_TOR: return REACH_PRIVATE; // either from Tor, or don't care about our address - } - } -} - -void CService::Init() -{ - port = 0; -} - -CService::CService() -{ - Init(); -} - -CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn) -{ -} - -CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn) -{ -} - -CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn) -{ -} - -CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port)) -{ - assert(addr.sin_family == AF_INET); -} - -CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr, addr.sin6_scope_id), port(ntohs(addr.sin6_port)) -{ - assert(addr.sin6_family == AF_INET6); -} - -bool CService::SetSockAddr(const struct sockaddr *paddr) -{ - switch (paddr->sa_family) { - case AF_INET: - *this = CService(*(const struct sockaddr_in*)paddr); - return true; - case AF_INET6: - *this = CService(*(const struct sockaddr_in6*)paddr); - return true; - default: - return false; - } -} - -unsigned short CService::GetPort() const -{ - return port; -} - -bool operator==(const CService& a, const CService& b) -{ - return (CNetAddr)a == (CNetAddr)b && a.port == b.port; -} - -bool operator!=(const CService& a, const CService& b) -{ - return (CNetAddr)a != (CNetAddr)b || a.port != b.port; -} - -bool operator<(const CService& a, const CService& b) -{ - return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port); -} - -bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const -{ - if (IsIPv4()) { - if (*addrlen < (socklen_t)sizeof(struct sockaddr_in)) - return false; - *addrlen = sizeof(struct sockaddr_in); - struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr; - memset(paddrin, 0, *addrlen); - if (!GetInAddr(&paddrin->sin_addr)) - return false; - paddrin->sin_family = AF_INET; - paddrin->sin_port = htons(port); - return true; - } - if (IsIPv6()) { - if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6)) - return false; - *addrlen = sizeof(struct sockaddr_in6); - struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr; - memset(paddrin6, 0, *addrlen); - if (!GetIn6Addr(&paddrin6->sin6_addr)) - return false; - paddrin6->sin6_scope_id = scopeId; - paddrin6->sin6_family = AF_INET6; - paddrin6->sin6_port = htons(port); - return true; - } - return false; -} - -std::vector CService::GetKey() const -{ - std::vector vKey; - vKey.resize(18); - memcpy(&vKey[0], ip, 16); - vKey[16] = port / 0x100; - vKey[17] = port & 0x0FF; - return vKey; -} - -std::string CService::ToStringPort() const -{ - return strprintf("%u", port); -} - -std::string CService::ToStringIPPort() const -{ - if (IsIPv4() || IsTor()) { - return ToStringIP() + ":" + ToStringPort(); - } else { - return "[" + ToStringIP() + "]:" + ToStringPort(); - } -} - -std::string CService::ToString() const -{ - return ToStringIPPort(); -} - -void CService::SetPort(unsigned short portIn) -{ - port = portIn; -} - -CSubNet::CSubNet(): - valid(false) -{ - memset(netmask, 0, sizeof(netmask)); -} - -CSubNet::CSubNet(const CNetAddr &addr, int32_t mask) -{ - valid = true; - network = addr; - // Default to /32 (IPv4) or /128 (IPv6), i.e. match single address - memset(netmask, 255, sizeof(netmask)); - - // IPv4 addresses start at offset 12, and first 12 bytes must match, so just offset n - const int astartofs = network.IsIPv4() ? 12 : 0; - - int32_t n = mask; - if(n >= 0 && n <= (128 - astartofs*8)) // Only valid if in range of bits of address - { - n += astartofs*8; - // Clear bits [n..127] - for (; n < 128; ++n) - netmask[n>>3] &= ~(1<<(7-(n&7))); - } else - valid = false; - - // Normalize network according to netmask - for(int x=0; x<16; ++x) - network.ip[x] &= netmask[x]; -} - -CSubNet::CSubNet(const CNetAddr &addr, const CNetAddr &mask) -{ - valid = true; - network = addr; - // Default to /32 (IPv4) or /128 (IPv6), i.e. match single address - memset(netmask, 255, sizeof(netmask)); - - // IPv4 addresses start at offset 12, and first 12 bytes must match, so just offset n - const int astartofs = network.IsIPv4() ? 12 : 0; - - for(int x=astartofs; x<16; ++x) - netmask[x] = mask.ip[x]; - - // Normalize network according to netmask - for(int x=0; x<16; ++x) - network.ip[x] &= netmask[x]; -} - - bool LookupSubNet(const char* pszName, CSubNet& ret) { std::string strSubnet(pszName); @@ -1295,97 +681,6 @@ bool LookupSubNet(const char* pszName, CSubNet& ret) return false; } -CSubNet::CSubNet(const CNetAddr &addr): - valid(addr.IsValid()) -{ - memset(netmask, 255, sizeof(netmask)); - network = addr; -} - -bool CSubNet::Match(const CNetAddr &addr) const -{ - if (!valid || !addr.IsValid()) - return false; - for(int x=0; x<16; ++x) - if ((addr.ip[x] & netmask[x]) != network.ip[x]) - return false; - return true; -} - -static inline int NetmaskBits(uint8_t x) -{ - switch(x) { - case 0x00: return 0; break; - case 0x80: return 1; break; - case 0xc0: return 2; break; - case 0xe0: return 3; break; - case 0xf0: return 4; break; - case 0xf8: return 5; break; - case 0xfc: return 6; break; - case 0xfe: return 7; break; - case 0xff: return 8; break; - default: return -1; break; - } -} - -std::string CSubNet::ToString() const -{ - /* Parse binary 1{n}0{N-n} to see if mask can be represented as /n */ - int cidr = 0; - bool valid_cidr = true; - int n = network.IsIPv4() ? 12 : 0; - for (; n < 16 && netmask[n] == 0xff; ++n) - cidr += 8; - if (n < 16) { - int bits = NetmaskBits(netmask[n]); - if (bits < 0) - valid_cidr = false; - else - cidr += bits; - ++n; - } - for (; n < 16 && valid_cidr; ++n) - if (netmask[n] != 0x00) - valid_cidr = false; - - /* Format output */ - std::string strNetmask; - if (valid_cidr) { - strNetmask = strprintf("%u", cidr); - } else { - if (network.IsIPv4()) - strNetmask = strprintf("%u.%u.%u.%u", netmask[12], netmask[13], netmask[14], netmask[15]); - else - strNetmask = strprintf("%x:%x:%x:%x:%x:%x:%x:%x", - netmask[0] << 8 | netmask[1], netmask[2] << 8 | netmask[3], - netmask[4] << 8 | netmask[5], netmask[6] << 8 | netmask[7], - netmask[8] << 8 | netmask[9], netmask[10] << 8 | netmask[11], - netmask[12] << 8 | netmask[13], netmask[14] << 8 | netmask[15]); - } - - return network.ToString() + "/" + strNetmask; -} - -bool CSubNet::IsValid() const -{ - return valid; -} - -bool operator==(const CSubNet& a, const CSubNet& b) -{ - return a.valid == b.valid && a.network == b.network && !memcmp(a.netmask, b.netmask, 16); -} - -bool operator!=(const CSubNet& a, const CSubNet& b) -{ - return !(a==b); -} - -bool operator<(const CSubNet& a, const CSubNet& b) -{ - return (a.network < b.network || (a.network == b.network && memcmp(a.netmask, b.netmask, 16) < 0)); -} - #ifdef WIN32 std::string NetworkErrorString(int err) { diff --git a/src/netbase.h b/src/netbase.h index 26807ae69..d0abd5e95 100644 --- a/src/netbase.h +++ b/src/netbase.h @@ -10,6 +10,7 @@ #endif #include "compat.h" +#include "netaddress.h" #include "serialize.h" #include @@ -24,163 +25,6 @@ static const int DEFAULT_CONNECT_TIMEOUT = 5000; //! -dns default static const int DEFAULT_NAME_LOOKUP = true; -#ifdef WIN32 -// In MSVC, this is defined as a macro, undefine it to prevent a compile and link error -#undef SetPort -#endif - -enum Network -{ - NET_UNROUTABLE = 0, - NET_IPV4, - NET_IPV6, - NET_TOR, - - NET_MAX, -}; - -/** IP address (IPv6, or IPv4 using mapped IPv6 range (::FFFF:0:0/96)) */ -class CNetAddr -{ - protected: - unsigned char ip[16]; // in network byte order - uint32_t scopeId; // for scoped/link-local ipv6 addresses - - public: - CNetAddr(); - CNetAddr(const struct in_addr& ipv4Addr); - void Init(); - void SetIP(const CNetAddr& ip); - - /** - * Set raw IPv4 or IPv6 address (in network byte order) - * @note Only NET_IPV4 and NET_IPV6 are allowed for network. - */ - void SetRaw(Network network, const uint8_t *data); - - bool SetSpecial(const std::string &strName); // for Tor addresses - bool IsIPv4() const; // IPv4 mapped address (::FFFF:0:0/96, 0.0.0.0/0) - bool IsIPv6() const; // IPv6 address (not mapped IPv4, not Tor) - bool IsRFC1918() const; // IPv4 private networks (10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12) - bool IsRFC2544() const; // IPv4 inter-network communcations (192.18.0.0/15) - bool IsRFC6598() const; // IPv4 ISP-level NAT (100.64.0.0/10) - bool IsRFC5737() const; // IPv4 documentation addresses (192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24) - bool IsRFC3849() const; // IPv6 documentation address (2001:0DB8::/32) - bool IsRFC3927() const; // IPv4 autoconfig (169.254.0.0/16) - bool IsRFC3964() const; // IPv6 6to4 tunnelling (2002::/16) - bool IsRFC4193() const; // IPv6 unique local (FC00::/7) - bool IsRFC4380() const; // IPv6 Teredo tunnelling (2001::/32) - bool IsRFC4843() const; // IPv6 ORCHID (2001:10::/28) - bool IsRFC4862() const; // IPv6 autoconfig (FE80::/64) - bool IsRFC6052() const; // IPv6 well-known prefix (64:FF9B::/96) - bool IsRFC6145() const; // IPv6 IPv4-translated address (::FFFF:0:0:0/96) - bool IsTor() const; - bool IsLocal() const; - bool IsRoutable() const; - bool IsValid() const; - bool IsMulticast() const; - enum Network GetNetwork() const; - std::string ToString() const; - std::string ToStringIP() const; - unsigned int GetByte(int n) const; - uint64_t GetHash() const; - bool GetInAddr(struct in_addr* pipv4Addr) const; - std::vector GetGroup() const; - int GetReachabilityFrom(const CNetAddr *paddrPartner = NULL) const; - - CNetAddr(const struct in6_addr& pipv6Addr, const uint32_t scope = 0); - bool GetIn6Addr(struct in6_addr* pipv6Addr) const; - - friend bool operator==(const CNetAddr& a, const CNetAddr& b); - friend bool operator!=(const CNetAddr& a, const CNetAddr& b); - friend bool operator<(const CNetAddr& a, const CNetAddr& b); - - ADD_SERIALIZE_METHODS; - - template - inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { - READWRITE(FLATDATA(ip)); - } - - friend class CSubNet; -}; - -class CSubNet -{ - protected: - /// Network (base) address - CNetAddr network; - /// Netmask, in network byte order - uint8_t netmask[16]; - /// Is this value valid? (only used to signal parse errors) - bool valid; - - public: - CSubNet(); - CSubNet(const CNetAddr &addr, int32_t mask); - CSubNet(const CNetAddr &addr, const CNetAddr &mask); - - //constructor for single ip subnet (/32 or /128) - explicit CSubNet(const CNetAddr &addr); - - bool Match(const CNetAddr &addr) const; - - std::string ToString() const; - bool IsValid() const; - - friend bool operator==(const CSubNet& a, const CSubNet& b); - friend bool operator!=(const CSubNet& a, const CSubNet& b); - friend bool operator<(const CSubNet& a, const CSubNet& b); - - ADD_SERIALIZE_METHODS; - - template - inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { - READWRITE(network); - READWRITE(FLATDATA(netmask)); - READWRITE(FLATDATA(valid)); - } -}; - -/** A combination of a network address (CNetAddr) and a (TCP) port */ -class CService : public CNetAddr -{ - protected: - unsigned short port; // host order - - public: - CService(); - CService(const CNetAddr& ip, unsigned short port); - CService(const struct in_addr& ipv4Addr, unsigned short port); - CService(const struct sockaddr_in& addr); - void Init(); - void SetPort(unsigned short portIn); - unsigned short GetPort() const; - bool GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const; - bool SetSockAddr(const struct sockaddr* paddr); - friend bool operator==(const CService& a, const CService& b); - friend bool operator!=(const CService& a, const CService& b); - friend bool operator<(const CService& a, const CService& b); - std::vector GetKey() const; - std::string ToString() const; - std::string ToStringPort() const; - std::string ToStringIPPort() const; - - CService(const struct in6_addr& ipv6Addr, unsigned short port); - CService(const struct sockaddr_in6& addr); - - ADD_SERIALIZE_METHODS; - - template - inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { - READWRITE(FLATDATA(ip)); - unsigned short portN = htons(port); - READWRITE(FLATDATA(portN)); - if (ser_action.ForRead()) - port = ntohs(portN); - } -}; - class proxyType { public: