/*
- * Copyright 2014 Facebook, Inc.
+ * Copyright 2015 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* isTeredo, isIPv4Mapped, tryCreateIPv4, type
*
* @see IPAddress
+ *
+ * Notes on scope ID parsing:
+ *
+ * getaddrinfo() uses if_nametoindex() to convert interface names
+ * into a numerical index. For instance,
+ * "fe80::202:c9ff:fec1:ee08%eth0" may return scope ID 2 on some
+ * hosts, but other numbers on other hosts. It will fail entirely on
+ * hosts without an eth0 interface.
+ *
+ * Serializing / Deserializing IPAddressB6's on different hosts
+ * that use link-local scoping probably won't work.
*/
class IPAddressV6 : boost::totally_ordered<IPAddressV6> {
public:
// Binary prefix for 6to4 networks
static const uint32_t PREFIX_6TO4;
+ // Size of std::string returned by toFullyQualified.
+ static constexpr size_t kToFullyQualifiedSize =
+ 8 /*words*/ * 4 /*hex chars per word*/ + 7 /*separators*/;
+
/**
* Create a new IPAddress instance from the provided binary data.
* @throws IPAddressFormatException if the input length is not 16 bytes.
// Create an IPAddressV6 from a string
// @throws IPAddressFormatException
+ //
explicit IPAddressV6(StringPiece ip);
// ByteArray16 constructor
// in6_addr constructor
explicit IPAddressV6(const in6_addr& src);
+ // sockaddr_in6 constructor
+ explicit IPAddressV6(const sockaddr_in6& src);
+
/**
* Create a link-local IPAddressV6 from the specified ethernet MAC address.
*/
// return underlying in6_addr structure
in6_addr toAddr() const { return addr_.in6Addr_; }
+ uint16_t getScopeId() const { return scope_; }
+ void setScopeId(uint16_t scope) {
+ scope_ = scope;
+ }
+
sockaddr_in6 toSockAddr() const {
sockaddr_in6 addr;
memset(&addr, 0, sizeof(sockaddr_in6));
addr.sin6_family = AF_INET6;
+ addr.sin6_scope_id = scope_;
memcpy(&addr.sin6_addr, &addr_.in6Addr_, sizeof(in6_addr));
return addr;
}
explicit AddressStorage(MacAddress mac);
} addr_;
+ // Link-local scope id. This should always be 0 for IPAddresses that
+ // are *not* link-local.
+ uint16_t scope_{0};
+
static const std::array<ByteArray16, 129> masks_;
/**
* Return true if two addresses are equal.
*/
inline bool operator==(const IPAddressV6& addr1, const IPAddressV6& addr2) {
- return (std::memcmp(addr1.toAddr().s6_addr, addr2.toAddr().s6_addr, 16) == 0);
+ return (std::memcmp(addr1.toAddr().s6_addr, addr2.toAddr().s6_addr, 16) == 0)
+ && addr1.getScopeId() == addr2.getScopeId();
}
// Return true if addr1 < addr2
inline bool operator<(const IPAddressV6& addr1, const IPAddressV6& addr2) {
- return (std::memcmp(addr1.toAddr().s6_addr, addr2.toAddr().s6_addr, 16) < 0);
+ auto cmp = std::memcmp(addr1.toAddr().s6_addr,
+ addr2.toAddr().s6_addr, 16) < 0;
+ if (!cmp) {
+ return addr1.getScopeId() < addr2.getScopeId();
+ } else {
+ return cmp;
+ }
}
} // folly