Seastar
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ethernet.hh
1/*
2 * This file is open source software, licensed to you under the terms
3 * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
4 * distributed with this work for additional information regarding copyright
5 * ownership. You may not use this file except in compliance with the License.
6 *
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing,
12 * software distributed under the License is distributed on an
13 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14 * KIND, either express or implied. See the License for the
15 * specific language governing permissions and limitations
16 * under the License.
17 */
18/*
19 * Copyright (C) 2014 Cloudius Systems, Ltd.
20 */
21
22#pragma once
23
24#if FMT_VERSION >= 90000
25#include <fmt/ostream.h>
26#endif
27
28#include <array>
29#include <assert.h>
30#include <algorithm>
31#include <seastar/net/byteorder.hh>
32
33namespace seastar {
34
35namespace net {
36
38 ethernet_address() noexcept
39 : mac{} {}
40
41 ethernet_address(const uint8_t *eaddr) noexcept {
42 std::copy(eaddr, eaddr + 6, mac.begin());
43 }
44
45 ethernet_address(std::initializer_list<uint8_t> eaddr) noexcept {
46 assert(eaddr.size() == mac.size());
47 std::copy(eaddr.begin(), eaddr.end(), mac.begin());
48 }
49
50 std::array<uint8_t, 6> mac;
51
52 template <typename Adjuster>
53 void adjust_endianness(Adjuster) noexcept {}
54
55 static ethernet_address read(const char* p) noexcept {
57 std::copy_n(p, size(), reinterpret_cast<char*>(ea.mac.data()));\
58 return ea;
59 }
60 static ethernet_address consume(const char*& p) noexcept {
61 auto ea = read(p);
62 p += size();
63 return ea;
64 }
65 void write(char* p) const noexcept {
66 std::copy_n(reinterpret_cast<const char*>(mac.data()), size(), p);
67 }
68 void produce(char*& p) const noexcept {
69 write(p);
70 p += size();
71 }
72 static constexpr size_t size() noexcept {
73 return 6;
74 }
75} __attribute__((packed));
76
77std::ostream& operator<<(std::ostream& os, ethernet_address ea);
78
79struct ethernet {
81 static address broadcast_address() {
82 return {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
83 }
84 static constexpr uint16_t arp_hardware_type() { return 1; }
85};
86
87struct eth_hdr {
88 ethernet_address dst_mac;
89 ethernet_address src_mac;
90 packed<uint16_t> eth_proto;
91 template <typename Adjuster>
92 auto adjust_endianness(Adjuster a) {
93 return a(eth_proto);
94 }
95} __attribute__((packed));
96
97ethernet_address parse_ethernet_address(std::string addr);
98}
99
100}
101
102#if FMT_VERSION >= 90000
103template <> struct fmt::formatter<seastar::net::ethernet_address> : fmt::ostream_formatter {};
104#endif
Seastar API namespace.
Definition: abort_on_ebadf.hh:26
Definition: ethernet.hh:87
Definition: ethernet.hh:37
Definition: ethernet.hh:79
Definition: unaligned.hh:58