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// Copyright (c) 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/ip_address.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "net/base/ip_address_number.h"
#include "url/gurl.h"
#include "url/url_canon_ip.h"
namespace net {
IPAddress::IPAddress() {}
IPAddress::IPAddress(const IPAddressNumber& address) : ip_address_(address) {}
IPAddress::IPAddress(const IPAddress& other) = default;
IPAddress::IPAddress(const uint8_t* address, size_t address_len)
: ip_address_(address, address + address_len) {}
IPAddress::IPAddress(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3) {
ip_address_.reserve(4);
ip_address_.push_back(b0);
ip_address_.push_back(b1);
ip_address_.push_back(b2);
ip_address_.push_back(b3);
}
IPAddress::~IPAddress() {}
bool IPAddress::IsIPv4() const {
return ip_address_.size() == kIPv4AddressSize;
}
bool IPAddress::IsIPv6() const {
return ip_address_.size() == kIPv6AddressSize;
}
bool IPAddress::IsValid() const {
return IsIPv4() || IsIPv6();
}
bool IPAddress::IsReserved() const {
return IsIPAddressReserved(ip_address_);
}
bool IPAddress::IsZero() const {
for (auto x : ip_address_) {
if (x != 0)
return false;
}
return !empty();
}
bool IPAddress::IsIPv4MappedIPv6() const {
return net::IsIPv4Mapped(ip_address_);
}
std::string IPAddress::ToString() const {
return IPAddressToString(ip_address_);
}
bool IPAddress::AssignFromIPLiteral(const base::StringPiece& ip_literal) {
std::vector<uint8_t> number;
if (!ParseIPLiteralToNumber(ip_literal, &number))
return false;
std::swap(number, ip_address_);
return true;
}
// static
IPAddress IPAddress::IPv4Localhost() {
static const uint8_t kLocalhostIPv4[] = {127, 0, 0, 1};
return IPAddress(kLocalhostIPv4);
}
// static
IPAddress IPAddress::IPv6Localhost() {
static const uint8_t kLocalhostIPv6[] = {0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1};
return IPAddress(kLocalhostIPv6);
}
// static
IPAddress IPAddress::AllZeros(size_t num_zero_bytes) {
return IPAddress(std::vector<uint8_t>(num_zero_bytes));
}
// static
IPAddress IPAddress::IPv4AllZeros() {
return AllZeros(kIPv4AddressSize);
}
// static
IPAddress IPAddress::IPv6AllZeros() {
return AllZeros(kIPv6AddressSize);
}
bool IPAddress::operator==(const IPAddress& that) const {
return ip_address_ == that.ip_address_;
}
bool IPAddress::operator!=(const IPAddress& that) const {
return ip_address_ != that.ip_address_;
}
bool IPAddress::operator<(const IPAddress& that) const {
// Sort IPv4 before IPv6.
if (ip_address_.size() != that.ip_address_.size()) {
return ip_address_.size() < that.ip_address_.size();
}
return ip_address_ < that.ip_address_;
}
std::string IPAddressToStringWithPort(const IPAddress& address, uint16_t port) {
return IPAddressToStringWithPort(address.bytes(), port);
}
std::string IPAddressToPackedString(const IPAddress& address) {
return IPAddressToPackedString(address.bytes());
}
IPAddress ConvertIPv4ToIPv4MappedIPv6(const IPAddress& address) {
return IPAddress(ConvertIPv4NumberToIPv6Number(address.bytes()));
}
IPAddress ConvertIPv4MappedIPv6ToIPv4(const IPAddress& address) {
return IPAddress(ConvertIPv4MappedToIPv4(address.bytes()));
}
bool IPAddressMatchesPrefix(const IPAddress& ip_address,
const IPAddress& ip_prefix,
size_t prefix_length_in_bits) {
return IPNumberMatchesPrefix(ip_address.bytes(), ip_prefix.bytes(),
prefix_length_in_bits);
}
bool ParseCIDRBlock(const std::string& cidr_literal,
IPAddress* ip_address,
size_t* prefix_length_in_bits) {
// We expect CIDR notation to match one of these two templates:
// <IPv4-literal> "/" <number of bits>
// <IPv6-literal> "/" <number of bits>
std::vector<base::StringPiece> parts = base::SplitStringPiece(
cidr_literal, "/", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (parts.size() != 2)
return false;
// Parse the IP address.
if (!ip_address->AssignFromIPLiteral(parts[0]))
return false;
// TODO(martijnc): Find a more general solution for the overly permissive
// base::StringToInt() parsing. https://crbug.com/596523.
const base::StringPiece& prefix_length = parts[1];
if (prefix_length.starts_with("+"))
return false;
// Parse the prefix length.
int number_of_bits = -1;
if (!base::StringToInt(prefix_length, &number_of_bits))
return false;
// Make sure the prefix length is in a valid range.
if (number_of_bits < 0 ||
number_of_bits > static_cast<int>(ip_address->size() * 8))
return false;
*prefix_length_in_bits = static_cast<size_t>(number_of_bits);
return true;
}
unsigned CommonPrefixLength(const IPAddress& a1, const IPAddress& a2) {
return CommonPrefixLength(a1.bytes(), a2.bytes());
}
unsigned MaskPrefixLength(const IPAddress& mask) {
return MaskPrefixLength(mask.bytes());
}
} // namespace net
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