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-rw-r--r--common/netd/libnetdutils/include/netdutils/InternetAddresses.h331
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diff --git a/common/netd/libnetdutils/include/netdutils/InternetAddresses.h b/common/netd/libnetdutils/include/netdutils/InternetAddresses.h
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index d10cec7d..00000000
--- a/common/netd/libnetdutils/include/netdutils/InternetAddresses.h
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@@ -1,331 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <netdb.h>
-#include <netinet/in.h>
-#include <stdint.h>
-#include <cstring>
-#include <limits>
-#include <string>
-
-#include "netdutils/NetworkConstants.h"
-
-namespace android {
-namespace netdutils {
-
-namespace internal_ {
-
-// A structure to hold data for dealing with Internet addresses (IPAddress) and
-// related types such as IPSockAddr and IPPrefix.
-struct compact_ipdata {
- uint8_t family{AF_UNSPEC};
- uint8_t cidrlen{0U}; // written and read in host-byte order
- in_port_t port{0U}; // written and read in host-byte order
- uint32_t scope_id{0U};
- union {
- in_addr v4;
- in6_addr v6;
- } ip{.v6 = IN6ADDR_ANY_INIT}; // written and read in network-byte order
-
- // Classes that use compact_ipdata and this method should be sure to clear
- // (i.e. zero or make uniform) any fields not relevant to the class.
- friend bool operator==(const compact_ipdata& a, const compact_ipdata& b) {
- if ((a.family != b.family) || (a.cidrlen != b.cidrlen) || (a.port != b.port) ||
- (a.scope_id != b.scope_id)) {
- return false;
- }
- switch (a.family) {
- case AF_UNSPEC:
- // After the above checks, two AF_UNSPEC objects can be
- // considered equal, for convenience.
- return true;
- case AF_INET: {
- const in_addr v4a = a.ip.v4;
- const in_addr v4b = b.ip.v4;
- return (v4a.s_addr == v4b.s_addr);
- }
- case AF_INET6: {
- const in6_addr v6a = a.ip.v6;
- const in6_addr v6b = b.ip.v6;
- return IN6_ARE_ADDR_EQUAL(&v6a, &v6b);
- }
- }
- return false;
- }
-
- // Classes that use compact_ipdata and this method should be sure to clear
- // (i.e. zero or make uniform) any fields not relevant to the class.
- friend bool operator!=(const compact_ipdata& a, const compact_ipdata& b) { return !(a == b); }
-
- // Classes that use compact_ipdata and this method should be sure to clear
- // (i.e. zero or make uniform) any fields not relevant to the class.
- friend bool operator<(const compact_ipdata& a, const compact_ipdata& b) {
- if (a.family != b.family) return (a.family < b.family);
- switch (a.family) {
- case AF_INET: {
- const in_addr v4a = a.ip.v4;
- const in_addr v4b = b.ip.v4;
- if (v4a.s_addr != v4b.s_addr) return (ntohl(v4a.s_addr) < ntohl(v4b.s_addr));
- break;
- }
- case AF_INET6: {
- const in6_addr v6a = a.ip.v6;
- const in6_addr v6b = b.ip.v6;
- const int cmp = std::memcmp(v6a.s6_addr, v6b.s6_addr, IPV6_ADDR_LEN);
- if (cmp != 0) return cmp < 0;
- break;
- }
- }
- if (a.cidrlen != b.cidrlen) return (a.cidrlen < b.cidrlen);
- if (a.port != b.port) return (a.port < b.port);
- return (a.scope_id < b.scope_id);
- }
-};
-
-static_assert(AF_UNSPEC <= std::numeric_limits<uint8_t>::max(), "AF_UNSPEC value too large");
-static_assert(AF_INET <= std::numeric_limits<uint8_t>::max(), "AF_INET value too large");
-static_assert(AF_INET6 <= std::numeric_limits<uint8_t>::max(), "AF_INET6 value too large");
-static_assert(sizeof(compact_ipdata) == 24U, "compact_ipdata unexpectedly large");
-
-} // namespace internal_
-
-struct AddrinfoDeleter {
- void operator()(struct addrinfo* p) const {
- if (p != nullptr) {
- freeaddrinfo(p);
- }
- }
-};
-
-typedef std::unique_ptr<struct addrinfo, struct AddrinfoDeleter> ScopedAddrinfo;
-
-inline bool usesScopedIds(const in6_addr& ipv6) {
- return (IN6_IS_ADDR_LINKLOCAL(&ipv6) || IN6_IS_ADDR_MC_LINKLOCAL(&ipv6));
-}
-
-class IPPrefix;
-class IPSockAddr;
-
-class IPAddress {
- public:
- static bool forString(const std::string& repr, IPAddress* ip);
- static IPAddress forString(const std::string& repr) {
- IPAddress ip;
- if (!forString(repr, &ip)) return IPAddress();
- return ip;
- }
-
- IPAddress() = default;
- IPAddress(const IPAddress&) = default;
- IPAddress(IPAddress&&) = default;
-
- explicit IPAddress(const in_addr& ipv4)
- : mData({AF_INET, IPV4_ADDR_BITS, 0U, 0U, {.v4 = ipv4}}) {}
- explicit IPAddress(const in6_addr& ipv6)
- : mData({AF_INET6, IPV6_ADDR_BITS, 0U, 0U, {.v6 = ipv6}}) {}
- IPAddress(const in6_addr& ipv6, uint32_t scope_id)
- : mData({AF_INET6,
- IPV6_ADDR_BITS,
- 0U,
- // Sanity check: scoped_ids only for link-local addresses.
- usesScopedIds(ipv6) ? scope_id : 0U,
- {.v6 = ipv6}}) {}
- IPAddress(const IPAddress& ip, uint32_t scope_id) : IPAddress(ip) {
- mData.scope_id = (family() == AF_INET6 && usesScopedIds(mData.ip.v6)) ? scope_id : 0U;
- }
-
- IPAddress& operator=(const IPAddress&) = default;
- IPAddress& operator=(IPAddress&&) = default;
-
- constexpr sa_family_t family() const noexcept { return mData.family; }
- constexpr uint32_t scope_id() const noexcept { return mData.scope_id; }
-
- std::string toString() const noexcept;
-
- friend std::ostream& operator<<(std::ostream& os, const IPAddress& ip) {
- os << ip.toString();
- return os;
- }
- friend bool operator==(const IPAddress& a, const IPAddress& b) { return (a.mData == b.mData); }
- friend bool operator!=(const IPAddress& a, const IPAddress& b) { return (a.mData != b.mData); }
- friend bool operator<(const IPAddress& a, const IPAddress& b) { return (a.mData < b.mData); }
- friend bool operator>(const IPAddress& a, const IPAddress& b) { return (b.mData < a.mData); }
- friend bool operator<=(const IPAddress& a, const IPAddress& b) { return (a < b) || (a == b); }
- friend bool operator>=(const IPAddress& a, const IPAddress& b) { return (b < a) || (a == b); }
-
- private:
- friend class IPPrefix;
- friend class IPSockAddr;
-
- explicit IPAddress(const internal_::compact_ipdata& ipdata) : mData(ipdata) {
- mData.port = 0U;
- switch (mData.family) {
- case AF_INET:
- mData.cidrlen = IPV4_ADDR_BITS;
- mData.scope_id = 0U;
- break;
- case AF_INET6:
- mData.cidrlen = IPV6_ADDR_BITS;
- if (usesScopedIds(ipdata.ip.v6)) mData.scope_id = ipdata.scope_id;
- break;
- default:
- mData.cidrlen = 0U;
- mData.scope_id = 0U;
- break;
- }
- }
-
- internal_::compact_ipdata mData{};
-};
-
-class IPPrefix {
- public:
- static bool forString(const std::string& repr, IPPrefix* prefix);
- static IPPrefix forString(const std::string& repr) {
- IPPrefix prefix;
- if (!forString(repr, &prefix)) return IPPrefix();
- return prefix;
- }
-
- IPPrefix() = default;
- IPPrefix(const IPPrefix&) = default;
- IPPrefix(IPPrefix&&) = default;
-
- explicit IPPrefix(const IPAddress& ip) : mData(ip.mData) {}
-
- // Truncate the IP address |ip| at length |length|. Lengths greater than
- // the address-family-relevant maximum, along with negative values, are
- // interpreted as if the address-family-relevant maximum had been given.
- IPPrefix(const IPAddress& ip, int length);
-
- IPPrefix& operator=(const IPPrefix&) = default;
- IPPrefix& operator=(IPPrefix&&) = default;
-
- constexpr sa_family_t family() const noexcept { return mData.family; }
- IPAddress ip() const noexcept { return IPAddress(mData); }
- in_addr addr4() const noexcept { return mData.ip.v4; }
- in6_addr addr6() const noexcept { return mData.ip.v6; }
- constexpr int length() const noexcept { return mData.cidrlen; }
- bool contains(const IPPrefix& other) {
- return length() <= other.length() && IPPrefix(other.ip(), length()).ip() == ip();
- }
- bool contains(const IPAddress& other) {
- return IPPrefix(other, length()).ip() == ip();
- }
-
- bool isUninitialized() const noexcept;
- std::string toString() const noexcept;
-
- friend std::ostream& operator<<(std::ostream& os, const IPPrefix& prefix) {
- os << prefix.toString();
- return os;
- }
- friend bool operator==(const IPPrefix& a, const IPPrefix& b) { return (a.mData == b.mData); }
- friend bool operator!=(const IPPrefix& a, const IPPrefix& b) { return (a.mData != b.mData); }
- friend bool operator<(const IPPrefix& a, const IPPrefix& b) { return (a.mData < b.mData); }
- friend bool operator>(const IPPrefix& a, const IPPrefix& b) { return (b.mData < a.mData); }
- friend bool operator<=(const IPPrefix& a, const IPPrefix& b) { return (a < b) || (a == b); }
- friend bool operator>=(const IPPrefix& a, const IPPrefix& b) { return (b < a) || (a == b); }
-
- private:
- internal_::compact_ipdata mData{};
-};
-
-// An Internet socket address.
-//
-// Cannot represent other types of socket addresses (e.g. UNIX socket address, et cetera).
-class IPSockAddr {
- public:
- // TODO: static forString
-
- static IPSockAddr toIPSockAddr(const std::string& repr, in_port_t port) {
- return IPSockAddr(IPAddress::forString(repr), port);
- }
- static IPSockAddr toIPSockAddr(const sockaddr& sa) {
- switch (sa.sa_family) {
- case AF_INET:
- return IPSockAddr(*reinterpret_cast<const sockaddr_in*>(&sa));
- case AF_INET6:
- return IPSockAddr(*reinterpret_cast<const sockaddr_in6*>(&sa));
- default:
- return IPSockAddr();
- }
- }
- static IPSockAddr toIPSockAddr(const sockaddr_storage& ss) {
- return toIPSockAddr(*reinterpret_cast<const sockaddr*>(&ss));
- }
-
- IPSockAddr() = default;
- IPSockAddr(const IPSockAddr&) = default;
- IPSockAddr(IPSockAddr&&) = default;
-
- explicit IPSockAddr(const IPAddress& ip) : mData(ip.mData) {}
- IPSockAddr(const IPAddress& ip, in_port_t port) : mData(ip.mData) { mData.port = port; }
- explicit IPSockAddr(const sockaddr_in& ipv4sa)
- : IPSockAddr(IPAddress(ipv4sa.sin_addr), ntohs(ipv4sa.sin_port)) {}
- explicit IPSockAddr(const sockaddr_in6& ipv6sa)
- : IPSockAddr(IPAddress(ipv6sa.sin6_addr, ipv6sa.sin6_scope_id), ntohs(ipv6sa.sin6_port)) {}
-
- IPSockAddr& operator=(const IPSockAddr&) = default;
- IPSockAddr& operator=(IPSockAddr&&) = default;
-
- constexpr sa_family_t family() const noexcept { return mData.family; }
- IPAddress ip() const noexcept { return IPAddress(mData); }
- constexpr in_port_t port() const noexcept { return mData.port; }
-
- // Implicit conversion to sockaddr_storage.
- operator sockaddr_storage() const noexcept {
- sockaddr_storage ss;
- ss.ss_family = mData.family;
- switch (mData.family) {
- case AF_INET:
- reinterpret_cast<sockaddr_in*>(&ss)->sin_addr = mData.ip.v4;
- reinterpret_cast<sockaddr_in*>(&ss)->sin_port = htons(mData.port);
- break;
- case AF_INET6:
- reinterpret_cast<sockaddr_in6*>(&ss)->sin6_addr = mData.ip.v6;
- reinterpret_cast<sockaddr_in6*>(&ss)->sin6_port = htons(mData.port);
- reinterpret_cast<sockaddr_in6*>(&ss)->sin6_scope_id = mData.scope_id;
- break;
- }
- return ss;
- }
-
- std::string toString() const noexcept;
-
- friend std::ostream& operator<<(std::ostream& os, const IPSockAddr& prefix) {
- os << prefix.toString();
- return os;
- }
- friend bool operator==(const IPSockAddr& a, const IPSockAddr& b) {
- return (a.mData == b.mData);
- }
- friend bool operator!=(const IPSockAddr& a, const IPSockAddr& b) {
- return (a.mData != b.mData);
- }
- friend bool operator<(const IPSockAddr& a, const IPSockAddr& b) { return (a.mData < b.mData); }
- friend bool operator>(const IPSockAddr& a, const IPSockAddr& b) { return (b.mData < a.mData); }
- friend bool operator<=(const IPSockAddr& a, const IPSockAddr& b) { return (a < b) || (a == b); }
- friend bool operator>=(const IPSockAddr& a, const IPSockAddr& b) { return (b < a) || (a == b); }
-
- private:
- internal_::compact_ipdata mData{};
-};
-
-} // namespace netdutils
-} // namespace android
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