| // Copyright 2019 The Chromium OS 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 <arpa/inet.h> |
| #include <ifaddrs.h> |
| #include <linux/in6.h> |
| #include <netinet/in.h> |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <string> |
| |
| #include "arc/network/mac_address_generator.h" |
| |
| #ifndef ARC_NETWORK_NET_UTIL_H_ |
| #define ARC_NETWORK_NET_UTIL_H_ |
| |
| namespace arc_networkd { |
| |
| // Reverses the byte order of the argument. |
| constexpr uint32_t Byteswap32(uint32_t x) { |
| return (x >> 24) | (x << 24) | ((x >> 8) & 0xff00) | ((x << 8) & 0xff0000); |
| } |
| |
| // Reverses the byte order of the argument. |
| constexpr uint16_t Byteswap16(uint16_t x) { |
| return (x >> 8) | (x << 8); |
| } |
| |
| // Constexpr version of ntohl(). |
| constexpr uint32_t Ntohl(uint32_t x) { |
| return Byteswap32(x); |
| } |
| |
| // Constexpr version of htonl(). |
| constexpr uint32_t Htonl(uint32_t x) { |
| return Byteswap32(x); |
| } |
| |
| // Constexpr version of ntohs(). |
| constexpr uint16_t Ntohs(uint16_t x) { |
| return Byteswap16(x); |
| } |
| |
| // Constexpr version of htons(). |
| constexpr uint16_t Htons(uint16_t x) { |
| return Byteswap16(x); |
| } |
| |
| // Returns the network-byte order int32 representation of the IPv4 address given |
| // byte per byte, most significant bytes first. |
| constexpr uint32_t Ipv4Addr(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3) { |
| return (b3 << 24) | (b2 << 16) | (b1 << 8) | b0; |
| } |
| |
| // Returns the literal representation of the IPv4 address given in network byte |
| // order. |
| std::string IPv4AddressToString(uint32_t addr); |
| |
| // Returns the CIDR representation of an IPv4 address given in network byte |
| // order. |
| std::string IPv4AddressToCidrString(uint32_t addr, uint32_t prefix_length); |
| |
| // Returns a string representation of MAC address given. |
| std::string MacAddressToString(const MacAddress& addr); |
| |
| bool FindFirstIPv6Address(const std::string& ifname, struct in6_addr* address); |
| |
| bool GenerateRandomIPv6Prefix(struct in6_addr* prefix, int len); |
| |
| std::ostream& operator<<(std::ostream& stream, const struct in_addr& addr); |
| std::ostream& operator<<(std::ostream& stream, const struct in6_addr& addr); |
| |
| } // namespace arc_networkd |
| |
| #endif // ARC_NETWORK_NET_UTIL_H_ |