/*
- * 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.
// 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(to<std::string>(
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
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 {
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;