/*
- * Copyright 2017 Facebook, Inc.
+ * Copyright 2014-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
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);
+bool IPAddressV6::validate(StringPiece ip) noexcept {
+ return tryFromString(ip).hasValue();
}
// public default constructor
// public string constructor
IPAddressV6::IPAddressV6(StringPiece addr) {
- auto ip = addr.str();
+ auto maybeIp = tryFromString(addr);
+ if (maybeIp.hasError()) {
+ throw IPAddressFormatException(
+ to<std::string>("Invalid IPv6 address '", addr, "'"));
+ }
+ *this = std::move(maybeIp.value());
+}
+
+Expected<IPAddressV6, IPAddressFormatError> IPAddressV6::tryFromString(
+ StringPiece str) noexcept {
+ auto ip = str.str();
// Allow addresses surrounded in brackets
if (ip.size() < 2) {
- throw IPAddressFormatException(
- sformat("Invalid IPv6 address '{}': address too short", ip));
+ return makeUnexpected(IPAddressFormatError::INVALID_IP);
}
if (ip.front() == '[' && ip.back() == ']') {
ip = ip.substr(1, ip.size() - 2);
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(sformat("Invalid IPv6 address '{}'", ip));
+ if (::getaddrinfo(ip.c_str(), nullptr, &hints, &result) == 0) {
+ SCOPE_EXIT {
+ ::freeaddrinfo(result);
+ };
+ const struct sockaddr_in6* sa =
+ reinterpret_cast<struct sockaddr_in6*>(result->ai_addr);
+ return IPAddressV6(*sa);
}
+ return makeUnexpected(IPAddressFormatError::INVALID_IP);
}
// in6_addr constructor
-IPAddressV6::IPAddressV6(const in6_addr& src) : addr_(src) {}
+IPAddressV6::IPAddressV6(const in6_addr& src) noexcept : addr_(src) {}
// sockaddr_in6 constructor
-IPAddressV6::IPAddressV6(const sockaddr_in6& src)
+IPAddressV6::IPAddressV6(const sockaddr_in6& src) noexcept
: addr_(src.sin6_addr), scope_(uint16_t(src.sin6_scope_id)) {}
// ByteArray16 constructor
-IPAddressV6::IPAddressV6(const ByteArray16& src) : addr_(src) {}
+IPAddressV6::IPAddressV6(const ByteArray16& src) noexcept : addr_(src) {}
// link-local constructor
IPAddressV6::IPAddressV6(LinkLocalTag, MacAddress mac) : addr_(mac) {}
return Optional<MacAddress>(MacAddress::fromBinary(range(bytes)));
}
-void IPAddressV6::setFromBinary(ByteRange bytes) {
- if (bytes.size() != 16) {
- throw IPAddressFormatException(sformat(
- "Invalid IPv6 binary data: length must be 16 bytes, got {}",
+IPAddressV6 IPAddressV6::fromBinary(ByteRange bytes) {
+ auto maybeIp = tryFromBinary(bytes);
+ if (maybeIp.hasError()) {
+ throw IPAddressFormatException(to<std::string>(
+ "Invalid IPv6 binary data: length must be 16 bytes, got ",
bytes.size()));
}
+ return maybeIp.value();
+}
+
+Expected<IPAddressV6, IPAddressFormatError> IPAddressV6::tryFromBinary(
+ ByteRange bytes) noexcept {
+ IPAddressV6 addr;
+ auto setResult = addr.trySetFromBinary(bytes);
+ if (setResult.hasError()) {
+ return makeUnexpected(std::move(setResult.error()));
+ }
+ return addr;
+}
+
+Expected<Unit, IPAddressFormatError> IPAddressV6::trySetFromBinary(
+ ByteRange bytes) noexcept {
+ if (bytes.size() != 16) {
+ return makeUnexpected(IPAddressFormatError::INVALID_IP);
+ }
memcpy(&addr_.in6Addr_.s6_addr, bytes.data(), sizeof(in6_addr));
scope_ = 0;
+ return unit;
}
// static