/*
- * Copyright 2016 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.
#include <folly/IPAddress.h>
#include <folly/IPAddressV4.h>
#include <folly/MacAddress.h>
+#include <folly/detail/IPAddressSource.h>
using std::ostream;
using std::string;
// 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 (!getaddrinfo(ip.c_str(), nullptr, &hints, &result)) {
struct sockaddr_in6* ipAddr = (struct sockaddr_in6*)result->ai_addr;
addr_.in6Addr_ = ipAddr->sin6_addr;
- scope_ = ipAddr->sin6_scope_id;
+ scope_ = uint16_t(ipAddr->sin6_scope_id);
freeaddrinfo(result);
} else {
- throw IPAddressFormatException("Invalid IPv6 address '", ip, "'");
+ throw IPAddressFormatException(
+ to<std::string>("Invalid IPv6 address '", ip, "'"));
}
}
// sockaddr_in6 constructor
IPAddressV6::IPAddressV6(const sockaddr_in6& src)
: addr_(src.sin6_addr)
- , scope_(src.sin6_scope_id)
+ , scope_(uint16_t(src.sin6_scope_id))
{
}
// 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
IPAddressV4 IPAddressV6::createIPv4() const {
if (!isIPv4Mapped()) {
// 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
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));
}
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);
string ip(buffer);
return ip;
} else {
- throw IPAddressFormatException("Invalid address with hex ",
- "'", detail::Bytes::toHex(bytes(), 16), "'");
+ throw IPAddressFormatException(to<std::string>(
+ "Invalid address with hex ",
+ "'",
+ detail::Bytes::toHex(bytes(), 16),
+ "'"));
}
}
return detail::fastIpv6ToString(addr_.in6Addr_);
}
+// public
+void IPAddressV6::toFullyQualifiedAppend(std::string& out) const {
+ detail::fastIpv6AppendToString(addr_.in6Addr_, out);
+}
+
+// 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 sformat("{}.ip6.arpa", join(".", a));
+}
+
// public
uint8_t IPAddressV6::getNthMSByte(size_t byteIndex) const {
const auto highestIndex = byteCount() - 1;
// 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 {