// Because of the massive pain that is libnl, this can't go into the socket
// portability header as you can't include <linux/if.h> and <net/if.h> in
// the same translation unit without getting errors -_-...
-#include <iphlpapi.h>
-#include <ntddndis.h>
+#include <iphlpapi.h> // @manual
+#include <ntddndis.h> // @manual
// Alias the max size of an interface name to what posix expects.
#define IFNAMSIZ IF_NAMESIZE
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) {}
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)) {
+ if (!isLinkLocal()) {
return folly::none;
}
- // The link-local address uses modified EUI-64 format,
+ return getMacAddressFromEUI64();
+}
+
+Optional<MacAddress> IPAddressV6::getMacAddressFromEUI64() const {
+ if (!(addr_.bytes_[11] == 0xff && addr_.bytes_[12] == 0xfe)) {
+ return folly::none;
+ }
+ // The auto configured 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 1: first 8 bytes are network prefix, 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
+ // Step 3: copy these bytes as they are
bytes[1] = addr_.bytes_[9];
bytes[2] = addr_.bytes_[10];
// Step 4: strip bytes (0xfffe), which are bytes_[11] and bytes_[12]
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
projects / folly.git / blobdiff