182 lines
4.2 KiB
C++
182 lines
4.2 KiB
C++
/*
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* \brief Ethernet protocol
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* \author Stefan Kalkowski
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* \date 2010-08-19
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*/
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/*
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* Copyright (C) 2010-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _NET__ETHERNET_H_
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#define _NET__ETHERNET_H_
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/* Genode includes */
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#include <base/exception.h>
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#include <util/string.h>
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#include <util/endian.h>
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#include <net/netaddress.h>
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namespace Net { class Ethernet_frame; }
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/**
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* Data layout of this class conforms to the Ethernet II frame
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* (IEEE 802.3).
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*
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* Ethernet-frame-header-format:
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*
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* ----------------------------------------------------------
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* | destination mac address | source mac address | ethertype |
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* | 6 bytes | 6 bytes | 2 bytes |
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* ----------------------------------------------------------
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*/
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class Net::Ethernet_frame
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{
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public:
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enum Size {
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ADDR_LEN = 6, /* MAC address length in bytes */
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};
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typedef Network_address<ADDR_LEN> Mac_address;
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static const Mac_address BROADCAST; /* broadcast address */
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private:
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Genode::uint8_t _dst_mac[ADDR_LEN]; /* destination mac address */
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Genode::uint8_t _src_mac[ADDR_LEN]; /* source mac address */
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Genode::uint16_t _type; /* encapsulated protocol */
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unsigned _data[0]; /* encapsulated data */
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public:
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class No_ethernet_frame : Genode::Exception {};
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/**
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* Id representing encapsulated protocol.
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*/
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enum Ether_type {
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IPV4 = 0x0800,
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ARP = 0x0806,
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WAKE_ON_LAN = 0x0842,
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SYN3 = 0x1337,
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RARP = 0x8035,
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APPLETALK = 0x809B,
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AARP = 0x80F3,
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VLAN_TAGGED = 0x8100,
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IPX = 0x8137,
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NOVELL = 0x8138,
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IPV6 = 0x86DD,
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MAC_CONTROL = 0x8808,
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SLOW = 0x8809,
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COBRANET = 0x8819,
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MPLS_UNICAST = 0x8847,
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MPLS_MULTICAST = 0x8848,
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PPPOE_DISCOVERY = 0x8863,
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PPPOE_STAGE = 0x8864,
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NLB = 0x886F,
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JUMBO_FRAMES = 0x8870,
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EAP = 0x888E,
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PROFINET = 0x8892,
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HYPERSCSI = 0x889A,
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ATAOE = 0x88A2,
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ETHERCAT = 0x88A4,
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PROVIDER_BRIDGING = 0x88A8,
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POWERLINK = 0x88AB,
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LLDP = 0x88CC,
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SERCOS_III = 0x88CD,
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CESOE = 0x88D8,
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HOMEPLUG = 0x88E1,
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MAC_SEC = 0x88E5,
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PRECISION_TIME = 0x88F7,
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CFM = 0x8902,
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FCOE = 0x8906,
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FCOE_Init = 0x8914,
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Q_IN_Q = 0x9100,
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LLT = 0xCAFE
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};
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/*****************
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** Constructor **
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*****************/
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Ethernet_frame(Genode::size_t size) {
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/* at least, frame header needs to fit in */
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if (size < sizeof(Ethernet_frame))
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throw No_ethernet_frame();
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}
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/***********************************
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** Ethernet field read-accessors **
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***********************************/
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/**
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* \return destination MAC address of frame.
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*/
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Mac_address dst() { return Mac_address(&_dst_mac); }
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/**
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* \return source MAC address of frame.
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*/
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Mac_address src() { return Mac_address(&_src_mac); }
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/**
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* \return EtherType - type of encapsulated protocol.
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*/
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Genode::uint16_t type() { return host_to_big_endian(_type); }
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/**
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* \return payload data.
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*/
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void *data() { return &_data; }
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/***********************************
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** Ethernet field write-accessors **
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***********************************/
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/**
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* Set the destination MAC address of this frame.
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*
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* \param mac MAC address to be set.
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*/
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void dst(Mac_address mac) { mac.copy(&_dst_mac); }
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/**
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* Set the source MAC address of this frame.
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*
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* \param mac MAC address to be set.
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*/
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void src(Mac_address mac) { mac.copy(&_src_mac); }
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/**
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* Set type of encapsulated protocol.
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*
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* \param type the EtherType to be set.
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*/
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void type(Genode::uint16_t type) { _type = host_to_big_endian(type); }
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/***************
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** Operators **
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***************/
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/**
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* Placement new operator.
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*/
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void * operator new(Genode::size_t size, void* addr) {
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return addr; }
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} __attribute__((packed));
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#endif /* _NET__ETHERNET_H_ */
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