/*
- * Copyright 2014 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* limitations under the License.
*/
-#include "IPAddressV6.h"
+#include <folly/IPAddressV6.h>
#include <ostream>
#include <string>
#include <folly/IPAddress.h>
#include <folly/IPAddressV4.h>
#include <folly/MacAddress.h>
+#include <folly/detail/IPAddressSource.h>
using std::ostream;
using std::string;
result->append(addr.str());
}
+bool IPAddressV6::validate(StringPiece ip) {
+ if (ip.size() > 0 && ip.front() == '[' && ip.back() == ']') {
+ ip = ip.subpiece(1, ip.size() - 2);
+ }
+
+ constexpr size_t kStrMaxLen = INET6_ADDRSTRLEN;
+ std::array<char, kStrMaxLen + 1> ip_cstr;
+ const size_t len = std::min(ip.size(), kStrMaxLen);
+ std::memcpy(ip_cstr.data(), ip.data(), len);
+ ip_cstr[len] = 0;
+ struct in6_addr addr;
+ return 1 == inet_pton(AF_INET6, ip_cstr.data(), &addr);
+}
+
// public default constructor
IPAddressV6::IPAddressV6() {
}
// Allow addresses surrounded in brackets
if (ip.size() < 2) {
- throw IPAddressFormatException("Invalid IPv6 address '", ip,
- "': address too short");
+ throw IPAddressFormatException(
+ to<std::string>("Invalid IPv6 address '", ip, "': address too short"));
}
if (ip.front() == '[' && ip.back() == ']') {
ip = ip.substr(1, ip.size() - 2);
}
- if (inet_pton(AF_INET6, ip.c_str(), &addr_.in6Addr_) != 1) {
- throw IPAddressFormatException("Invalid IPv6 address '", ip, "'");
+ struct addrinfo* result;
+ struct addrinfo hints;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET6;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_NUMERICHOST;
+ if (!getaddrinfo(ip.c_str(), nullptr, &hints, &result)) {
+ struct sockaddr_in6* ipAddr = (struct sockaddr_in6*)result->ai_addr;
+ addr_.in6Addr_ = ipAddr->sin6_addr;
+ scope_ = uint16_t(ipAddr->sin6_scope_id);
+ freeaddrinfo(result);
+ } else {
+ throw IPAddressFormatException(
+ to<std::string>("Invalid IPv6 address '", ip, "'"));
}
}
{
}
+// sockaddr_in6 constructor
+IPAddressV6::IPAddressV6(const sockaddr_in6& src)
+ : addr_(src.sin6_addr)
+ , scope_(uint16_t(src.sin6_scope_id))
+{
+}
+
// ByteArray16 constructor
IPAddressV6::IPAddressV6(const ByteArray16& src)
: addr_(src)
// See RFC 4291 sections 2.5.1, 2.5.6, and Appendix A
const auto* macBytes = mac.bytes();
memcpy(&bytes_.front(), "\xfe\x80\x00\x00\x00\x00\x00\x00", 8);
- bytes_[8] = macBytes[0] ^ 0x02;
+ bytes_[8] = uint8_t(macBytes[0] ^ 0x02);
bytes_[9] = macBytes[1];
bytes_[10] = macBytes[2];
bytes_[11] = 0xff;
bytes_[15] = macBytes[5];
}
+Optional<MacAddress> IPAddressV6::getMacAddressFromLinkLocal() const {
+ // Returned MacAddress must be constructed from a link-local IPv6 address.
+ if (!(addr_.bytes_[0] == 0xfe && addr_.bytes_[1] == 0x80 &&
+ addr_.bytes_[2] == 0x00 && addr_.bytes_[3] == 0x00 &&
+ addr_.bytes_[4] == 0x00 && addr_.bytes_[5] == 0x00 &&
+ addr_.bytes_[6] == 0x00 && addr_.bytes_[7] == 0x00 &&
+ addr_.bytes_[11] == 0xff && addr_.bytes_[12] == 0xfe)) {
+ return folly::none;
+ }
+ // The link-local address uses modified EUI-64 format,
+ // See RFC 4291 sections 2.5.1, 2.5.6, and Appendix A
+ std::array<uint8_t, MacAddress::SIZE> bytes;
+ // Step 1: first 8 bytes are fe:80:00:00:00:00:00:00, and can be stripped
+ // Step 2: invert the universal/local (U/L) flag (bit 7)
+ bytes[0] = addr_.bytes_[8] ^ 0x02;
+ // Step 3: copy thhese bytes are they are
+ bytes[1] = addr_.bytes_[9];
+ bytes[2] = addr_.bytes_[10];
+ // Step 4: strip bytes (0xfffe), which are bytes_[11] and bytes_[12]
+ // Step 5: copy the rest.
+ bytes[3] = addr_.bytes_[13];
+ bytes[4] = addr_.bytes_[14];
+ bytes[5] = addr_.bytes_[15];
+ return Optional<MacAddress>(MacAddress::fromBinary(range(bytes)));
+}
+
void IPAddressV6::setFromBinary(ByteRange bytes) {
if (bytes.size() != 16) {
- throw IPAddressFormatException("Invalid IPv6 binary data: length must "
- "be 16 bytes, got ", bytes.size());
+ throw IPAddressFormatException(to<std::string>(
+ "Invalid IPv6 binary data: length must ",
+ "be 16 bytes, got ",
+ bytes.size()));
}
memcpy(&addr_.in6Addr_.s6_addr, bytes.data(), sizeof(in6_addr));
+ scope_ = 0;
+}
+
+// static
+IPAddressV6 IPAddressV6::fromInverseArpaName(const std::string& arpaname) {
+ auto piece = StringPiece(arpaname);
+ if (!piece.removeSuffix(".ip6.arpa")) {
+ throw IPAddressFormatException(sformat(
+ "Invalid input. Should end with 'ip6.arpa'. Got '{}'", arpaname));
+ }
+ std::vector<StringPiece> pieces;
+ split(".", piece, pieces);
+ if (pieces.size() != 32) {
+ throw IPAddressFormatException(sformat("Invalid input. Got '{}'", piece));
+ }
+ std::array<char, IPAddressV6::kToFullyQualifiedSize> ip;
+ size_t pos = 0;
+ int count = 0;
+ for (size_t i = 1; i <= pieces.size(); i++) {
+ ip[pos] = pieces[pieces.size() - i][0];
+ pos++;
+ count++;
+ // add ':' every 4 chars
+ if (count == 4 && pos < ip.size()) {
+ ip[pos++] = ':';
+ count = 0;
+ }
+ }
+ return IPAddressV6(folly::range(ip));
}
// public
// convert two uint8_t bytes into a uint16_t as hibyte.lobyte
static inline uint16_t unpack(uint8_t lobyte, uint8_t hibyte) {
- return ((uint16_t)hibyte << 8) | (uint16_t)lobyte;
+ return uint16_t((uint16_t(hibyte) << 8) | lobyte);
}
// given a src string, unpack count*2 bytes into dest
static inline void unpackInto(const unsigned char* src,
uint16_t* dest,
size_t count) {
- for (int i = 0, hi = 1, lo = 0; i < count; i++) {
+ for (size_t i = 0, hi = 1, lo = 0; i < count; i++) {
dest[i] = unpack(src[hi], src[lo]);
hi += 2;
lo += 2;
auto subnetInfo = IPAddress::createNetwork(cidrNetwork);
auto addr = subnetInfo.first;
if (!addr.isV6()) {
- throw IPAddressFormatException("Address '", addr.toJson(), "' ",
- "is not a V6 address");
+ throw IPAddressFormatException(to<std::string>(
+ "Address '", addr.toJson(), "' ", "is not a V6 address"));
}
return inSubnetWithMask(addr.asV6(), fetchMask(subnetInfo.second));
}
// public
bool IPAddressV6::isLoopback() const {
- const unsigned char* by = bytes();
- for (int i = 0; i < 15; i++) {
- if (by[i] != 0x00) {
- return false;
- }
+ // Check if v4 mapped is loopback
+ if (isIPv4Mapped() && createIPv4().isLoopback()) {
+ return true;
}
- return (by[15] == 0x01);
+ auto socka = toSockAddr();
+ return IN6_IS_ADDR_LOOPBACK(&socka.sin6_addr);
}
bool IPAddressV6::isRoutable() const {
// public
bool IPAddressV6::isPrivate() const {
+ // Check if mapped is private
+ if (isIPv4Mapped() && createIPv4().isPrivate()) {
+ return true;
+ }
return isLoopback() || inBinarySubnet({{0xfc, 0x00}}, 7);
}
+// public
bool IPAddressV6::isLinkLocal() const {
return inBinarySubnet({{0xfe, 0x80}}, 10);
}
uint8_t IPAddressV6::getMulticastFlags() const {
DCHECK(isMulticast());
- return ((addr_.bytes_[1] >> 4) & 0xf);
+ return uint8_t((addr_.bytes_[1] >> 4) & 0xf);
}
uint8_t IPAddressV6::getMulticastScope() const {
DCHECK(isMulticast());
- return (addr_.bytes_[1] & 0xf);
+ return uint8_t(addr_.bytes_[1] & 0xf);
}
IPAddressV6 IPAddressV6::getSolicitedNodeAddress() const {
IPAddressV6 IPAddressV6::mask(size_t numBits) const {
static const auto bits = bitCount();
if (numBits > bits) {
- throw IPAddressFormatException("numBits(", numBits, ") > bitCount(",
- bits, ")");
+ throw IPAddressFormatException(
+ to<std::string>("numBits(", numBits, ") > bitCount(", bits, ")"));
}
ByteArray16 ba = detail::Bytes::mask(fetchMask(numBits), addr_.bytes_);
return IPAddressV6(ba);
// public
string IPAddressV6::str() const {
char buffer[INET6_ADDRSTRLEN] = {0};
- if (!inet_ntop(AF_INET6, &addr_.in6Addr_, buffer, INET6_ADDRSTRLEN)) {
- throw IPAddressFormatException("Invalid address with hex ",
- "'", detail::Bytes::toHex(bytes(), 16), "'");
+ sockaddr_in6 sock = toSockAddr();
+ if (!getnameinfo(
+ (sockaddr*)&sock, sizeof(sock),
+ buffer, INET6_ADDRSTRLEN,
+ nullptr, 0, NI_NUMERICHOST)) {
+ string ip(buffer);
+ return ip;
+ } else {
+ throw IPAddressFormatException(to<std::string>(
+ "Invalid address with hex ",
+ "'",
+ detail::Bytes::toHex(bytes(), 16),
+ "'"));
}
- string ip(buffer);
- return std::move(ip);
}
// public
string IPAddressV6::toFullyQualified() const {
- auto asHex = detail::Bytes::toHex(bytes(), 16);
- uint8_t chunks = asHex.size() / 4;
- for (int chunk = 1; chunk < chunks; chunk++) {
- // position changes as new characters are inserted
- int pos = (chunk*4) + (chunk - 1);
- asHex.insert(pos, ":");
+ return detail::fastIpv6ToString(addr_.in6Addr_);
+}
+
+// public
+string IPAddressV6::toInverseArpaName() const {
+ constexpr folly::StringPiece lut = "0123456789abcdef";
+ std::array<char, 32> a;
+ int j = 0;
+ for (int i = 15; i >= 0; i--) {
+ a[j] = (lut[bytes()[i] & 0xf]);
+ a[j + 1] = (lut[bytes()[i] >> 4]);
+ j += 2;
}
- return asHex;
+ return sformat("{}.ip6.arpa", join(".", a));
}
// public
// protected
const ByteArray16 IPAddressV6::fetchMask(size_t numBits) {
- static const uint8_t bits = bitCount();
+ static const size_t bits = bitCount();
if (numBits > bits) {
throw IPAddressFormatException("IPv6 addresses are 128 bits.");
}
return masks_[numBits];
}
+// public static
+CIDRNetworkV6 IPAddressV6::longestCommonPrefix(
+ const CIDRNetworkV6& one,
+ const CIDRNetworkV6& two) {
+ auto prefix = detail::Bytes::longestCommonPrefix(
+ one.first.addr_.bytes_, one.second, two.first.addr_.bytes_, two.second);
+ return {IPAddressV6(prefix.first), prefix.second};
+}
+
// protected
bool IPAddressV6::inBinarySubnet(const std::array<uint8_t, 2> addr,
size_t numBits) const {
- const unsigned char* subbytes = mask(numBits).bytes();
- return (std::memcmp(addr.data(), subbytes, 2) == 0);
+ auto masked = mask(numBits);
+ return (std::memcmp(addr.data(), masked.bytes(), 2) == 0);
}
// static private
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