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lwip/include/netif/etharp.h@0:281d6ff68967, 2010-11-19 (annotated)

Committer:: hexley
Date:: Fri Nov 19 01:54:45 2010 +0000
Revision:: 0:281d6ff68967

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User	Revision	Line number	New contents of line
hexley	0:281d6ff68967	1	/*
hexley	0:281d6ff68967	2	* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
hexley	0:281d6ff68967	3	* Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
hexley	0:281d6ff68967	4	* Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
hexley	0:281d6ff68967	5	* All rights reserved.
hexley	0:281d6ff68967	6	*
hexley	0:281d6ff68967	7	* Redistribution and use in source and binary forms, with or without modification,
hexley	0:281d6ff68967	8	* are permitted provided that the following conditions are met:
hexley	0:281d6ff68967	9	*
hexley	0:281d6ff68967	10	* 1. Redistributions of source code must retain the above copyright notice,
hexley	0:281d6ff68967	11	* this list of conditions and the following disclaimer.
hexley	0:281d6ff68967	12	* 2. Redistributions in binary form must reproduce the above copyright notice,
hexley	0:281d6ff68967	13	* this list of conditions and the following disclaimer in the documentation
hexley	0:281d6ff68967	14	* and/or other materials provided with the distribution.
hexley	0:281d6ff68967	15	* 3. The name of the author may not be used to endorse or promote products
hexley	0:281d6ff68967	16	* derived from this software without specific prior written permission.
hexley	0:281d6ff68967	17	*
hexley	0:281d6ff68967	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
hexley	0:281d6ff68967	19	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
hexley	0:281d6ff68967	20	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
hexley	0:281d6ff68967	21	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
hexley	0:281d6ff68967	22	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
hexley	0:281d6ff68967	23	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
hexley	0:281d6ff68967	24	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
hexley	0:281d6ff68967	25	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
hexley	0:281d6ff68967	26	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
hexley	0:281d6ff68967	27	* OF SUCH DAMAGE.
hexley	0:281d6ff68967	28	*
hexley	0:281d6ff68967	29	* This file is part of the lwIP TCP/IP stack.
hexley	0:281d6ff68967	30	*
hexley	0:281d6ff68967	31	* Author: Adam Dunkels <adam@sics.se>
hexley	0:281d6ff68967	32	*
hexley	0:281d6ff68967	33	*/
hexley	0:281d6ff68967	34
hexley	0:281d6ff68967	35	#ifndef __NETIF_ETHARP_H__
hexley	0:281d6ff68967	36	#define __NETIF_ETHARP_H__
hexley	0:281d6ff68967	37
hexley	0:281d6ff68967	38	#include "lwip/opt.h"
hexley	0:281d6ff68967	39
hexley	0:281d6ff68967	40	#if LWIP_ARP \|\| LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
hexley	0:281d6ff68967	41
hexley	0:281d6ff68967	42	#include "lwip/pbuf.h"
hexley	0:281d6ff68967	43	#include "lwip/ip_addr.h"
hexley	0:281d6ff68967	44	#include "lwip/netif.h"
hexley	0:281d6ff68967	45	#include "lwip/ip.h"
hexley	0:281d6ff68967	46
hexley	0:281d6ff68967	47	#ifdef __cplusplus
hexley	0:281d6ff68967	48	extern "C" {
hexley	0:281d6ff68967	49	#endif
hexley	0:281d6ff68967	50
hexley	0:281d6ff68967	51	#ifndef ETHARP_HWADDR_LEN
hexley	0:281d6ff68967	52	#define ETHARP_HWADDR_LEN 6
hexley	0:281d6ff68967	53	#endif
hexley	0:281d6ff68967	54
hexley	0:281d6ff68967	55	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	56	# include "arch/bpstruct.h"
hexley	0:281d6ff68967	57	#endif
hexley	0:281d6ff68967	58	PACK_STRUCT_BEGIN
hexley	0:281d6ff68967	59	struct eth_addr {
hexley	0:281d6ff68967	60	PACK_STRUCT_FIELD(u8_t addr[ETHARP_HWADDR_LEN]);
hexley	0:281d6ff68967	61	} PACK_STRUCT_STRUCT;
hexley	0:281d6ff68967	62	PACK_STRUCT_END
hexley	0:281d6ff68967	63	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	64	# include "arch/epstruct.h"
hexley	0:281d6ff68967	65	#endif
hexley	0:281d6ff68967	66
hexley	0:281d6ff68967	67	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	68	# include "arch/bpstruct.h"
hexley	0:281d6ff68967	69	#endif
hexley	0:281d6ff68967	70	PACK_STRUCT_BEGIN
hexley	0:281d6ff68967	71	/* Ethernet header */
hexley	0:281d6ff68967	72	struct eth_hdr {
hexley	0:281d6ff68967	73	#if ETH_PAD_SIZE
hexley	0:281d6ff68967	74	PACK_STRUCT_FIELD(u8_t padding[ETH_PAD_SIZE]);
hexley	0:281d6ff68967	75	#endif
hexley	0:281d6ff68967	76	PACK_STRUCT_FIELD(struct eth_addr dest);
hexley	0:281d6ff68967	77	PACK_STRUCT_FIELD(struct eth_addr src);
hexley	0:281d6ff68967	78	PACK_STRUCT_FIELD(u16_t type);
hexley	0:281d6ff68967	79	} PACK_STRUCT_STRUCT;
hexley	0:281d6ff68967	80	PACK_STRUCT_END
hexley	0:281d6ff68967	81	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	82	# include "arch/epstruct.h"
hexley	0:281d6ff68967	83	#endif
hexley	0:281d6ff68967	84
hexley	0:281d6ff68967	85	#define SIZEOF_ETH_HDR (14 + ETH_PAD_SIZE)
hexley	0:281d6ff68967	86
hexley	0:281d6ff68967	87	#if ETHARP_SUPPORT_VLAN
hexley	0:281d6ff68967	88
hexley	0:281d6ff68967	89	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	90	# include "arch/bpstruct.h"
hexley	0:281d6ff68967	91	#endif
hexley	0:281d6ff68967	92	PACK_STRUCT_BEGIN
hexley	0:281d6ff68967	93	/* VLAN header inserted between ethernet header and payload
hexley	0:281d6ff68967	94	* if 'type' in ethernet header is ETHTYPE_VLAN.
hexley	0:281d6ff68967	95	* See IEEE802.Q */
hexley	0:281d6ff68967	96	struct eth_vlan_hdr {
hexley	0:281d6ff68967	97	PACK_STRUCT_FIELD(u16_t tpid);
hexley	0:281d6ff68967	98	PACK_STRUCT_FIELD(u16_t prio_vid);
hexley	0:281d6ff68967	99	} PACK_STRUCT_STRUCT;
hexley	0:281d6ff68967	100	PACK_STRUCT_END
hexley	0:281d6ff68967	101	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	102	# include "arch/epstruct.h"
hexley	0:281d6ff68967	103	#endif
hexley	0:281d6ff68967	104
hexley	0:281d6ff68967	105	#define SIZEOF_VLAN_HDR 4
hexley	0:281d6ff68967	106	#define VLAN_ID(vlan_hdr) (htons((vlan_hdr)->prio_vid) & 0xFFF)
hexley	0:281d6ff68967	107
hexley	0:281d6ff68967	108	#endif /* ETHARP_SUPPORT_VLAN */
hexley	0:281d6ff68967	109
hexley	0:281d6ff68967	110	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	111	# include "arch/bpstruct.h"
hexley	0:281d6ff68967	112	#endif
hexley	0:281d6ff68967	113	PACK_STRUCT_BEGIN
hexley	0:281d6ff68967	114	/* the ARP message, see RFC 826 ("Packet format") */
hexley	0:281d6ff68967	115	struct etharp_hdr {
hexley	0:281d6ff68967	116	PACK_STRUCT_FIELD(u16_t hwtype);
hexley	0:281d6ff68967	117	PACK_STRUCT_FIELD(u16_t proto);
hexley	0:281d6ff68967	118	PACK_STRUCT_FIELD(u8_t hwlen);
hexley	0:281d6ff68967	119	PACK_STRUCT_FIELD(u8_t protolen);
hexley	0:281d6ff68967	120	PACK_STRUCT_FIELD(u16_t opcode);
hexley	0:281d6ff68967	121	PACK_STRUCT_FIELD(struct eth_addr shwaddr);
hexley	0:281d6ff68967	122	PACK_STRUCT_FIELD(struct ip_addr2 sipaddr);
hexley	0:281d6ff68967	123	PACK_STRUCT_FIELD(struct eth_addr dhwaddr);
hexley	0:281d6ff68967	124	PACK_STRUCT_FIELD(struct ip_addr2 dipaddr);
hexley	0:281d6ff68967	125	} PACK_STRUCT_STRUCT;
hexley	0:281d6ff68967	126	PACK_STRUCT_END
hexley	0:281d6ff68967	127	#ifdef PACK_STRUCT_USE_INCLUDES
hexley	0:281d6ff68967	128	# include "arch/epstruct.h"
hexley	0:281d6ff68967	129	#endif
hexley	0:281d6ff68967	130
hexley	0:281d6ff68967	131	#define SIZEOF_ETHARP_HDR 28
hexley	0:281d6ff68967	132	#define SIZEOF_ETHARP_PACKET (SIZEOF_ETH_HDR + SIZEOF_ETHARP_HDR)
hexley	0:281d6ff68967	133
hexley	0:281d6ff68967	134	/* 5 seconds period */
hexley	0:281d6ff68967	135	#define ARP_TMR_INTERVAL 5000
hexley	0:281d6ff68967	136
hexley	0:281d6ff68967	137	#define ETHTYPE_ARP 0x0806
hexley	0:281d6ff68967	138	#define ETHTYPE_IP 0x0800
hexley	0:281d6ff68967	139	#define ETHTYPE_VLAN 0x8100
hexley	0:281d6ff68967	140	#define ETHTYPE_PPPOEDISC 0x8863 /* PPP Over Ethernet Discovery Stage */
hexley	0:281d6ff68967	141	#define ETHTYPE_PPPOE 0x8864 /* PPP Over Ethernet Session Stage */
hexley	0:281d6ff68967	142
hexley	0:281d6ff68967	143	/* MEMCPY-like macro to copy to/from struct eth_addr's that are local variables
hexley	0:281d6ff68967	144	* or known to be 32-bit aligned within the protocol header. */
hexley	0:281d6ff68967	145	#ifndef ETHADDR32_COPY
hexley	0:281d6ff68967	146	#define ETHADDR32_COPY(src, dst) SMEMCPY(src, dst, ETHARP_HWADDR_LEN)
hexley	0:281d6ff68967	147	#endif
hexley	0:281d6ff68967	148
hexley	0:281d6ff68967	149	/* MEMCPY-like macro to copy to/from struct eth_addr's that are no local
hexley	0:281d6ff68967	150	* variables and known to be 16-bit aligned within the protocol header. */
hexley	0:281d6ff68967	151	#ifndef ETHADDR16_COPY
hexley	0:281d6ff68967	152	#define ETHADDR16_COPY(src, dst) SMEMCPY(src, dst, ETHARP_HWADDR_LEN)
hexley	0:281d6ff68967	153	#endif
hexley	0:281d6ff68967	154
hexley	0:281d6ff68967	155	#if LWIP_ARP /* don't build if not configured for use in lwipopts.h */
hexley	0:281d6ff68967	156
hexley	0:281d6ff68967	157	/* ARP message types (opcodes) */
hexley	0:281d6ff68967	158	#define ARP_REQUEST 1
hexley	0:281d6ff68967	159	#define ARP_REPLY 2
hexley	0:281d6ff68967	160
hexley	0:281d6ff68967	161	/* Define this to 1 and define LWIP_ARP_FILTER_NETIF_FN(pbuf, netif, type)
hexley	0:281d6ff68967	162	* to a filter function that returns the correct netif when using multiple
hexley	0:281d6ff68967	163	* netifs on one hardware interface where the netif's low-level receive
hexley	0:281d6ff68967	164	* routine cannot decide for the correct netif (e.g. when mapping multiple
hexley	0:281d6ff68967	165	* IP addresses to one hardware interface).
hexley	0:281d6ff68967	166	*/
hexley	0:281d6ff68967	167	#ifndef LWIP_ARP_FILTER_NETIF
hexley	0:281d6ff68967	168	#define LWIP_ARP_FILTER_NETIF 0
hexley	0:281d6ff68967	169	#endif
hexley	0:281d6ff68967	170
hexley	0:281d6ff68967	171	#if ARP_QUEUEING
hexley	0:281d6ff68967	172	/* struct for queueing outgoing packets for unknown address
hexley	0:281d6ff68967	173	* defined here to be accessed by memp.h
hexley	0:281d6ff68967	174	*/
hexley	0:281d6ff68967	175	struct etharp_q_entry {
hexley	0:281d6ff68967	176	struct etharp_q_entry *next;
hexley	0:281d6ff68967	177	struct pbuf *p;
hexley	0:281d6ff68967	178	};
hexley	0:281d6ff68967	179	#endif /* ARP_QUEUEING */
hexley	0:281d6ff68967	180
hexley	0:281d6ff68967	181	#define etharp_init() /* Compatibility define, not init needed. */
hexley	0:281d6ff68967	182	void etharp_tmr(void);
hexley	0:281d6ff68967	183	s8_t etharp_find_addr(struct netif netif, ip_addr_t ipaddr,
hexley	0:281d6ff68967	184	struct eth_addr eth_ret, ip_addr_t ip_ret);
hexley	0:281d6ff68967	185	err_t etharp_output(struct netif netif, struct pbuf q, ip_addr_t *ipaddr);
hexley	0:281d6ff68967	186	err_t etharp_query(struct netif netif, ip_addr_t ipaddr, struct pbuf *q);
hexley	0:281d6ff68967	187	err_t etharp_request(struct netif netif, ip_addr_t ipaddr);
hexley	0:281d6ff68967	188	/* For Ethernet network interfaces, we might want to send "gratuitous ARP";
hexley	0:281d6ff68967	189	* this is an ARP packet sent by a node in order to spontaneously cause other
hexley	0:281d6ff68967	190	* nodes to update an entry in their ARP cache.
hexley	0:281d6ff68967	191	* From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
hexley	0:281d6ff68967	192	#define etharp_gratuitous(netif) etharp_request((netif), &(netif)->ip_addr)
hexley	0:281d6ff68967	193
hexley	0:281d6ff68967	194	#if ETHARP_SUPPORT_STATIC_ENTRIES
hexley	0:281d6ff68967	195	err_t etharp_add_static_entry(ip_addr_t ipaddr, struct eth_addr ethaddr);
hexley	0:281d6ff68967	196	err_t etharp_remove_static_entry(ip_addr_t *ipaddr);
hexley	0:281d6ff68967	197	#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
hexley	0:281d6ff68967	198
hexley	0:281d6ff68967	199	#if LWIP_AUTOIP
hexley	0:281d6ff68967	200	err_t etharp_raw(struct netif netif, const struct eth_addr ethsrc_addr,
hexley	0:281d6ff68967	201	const struct eth_addr *ethdst_addr,
hexley	0:281d6ff68967	202	const struct eth_addr hwsrc_addr, const ip_addr_t ipsrc_addr,
hexley	0:281d6ff68967	203	const struct eth_addr hwdst_addr, const ip_addr_t ipdst_addr,
hexley	0:281d6ff68967	204	const u16_t opcode);
hexley	0:281d6ff68967	205	#endif /* LWIP_AUTOIP */
hexley	0:281d6ff68967	206
hexley	0:281d6ff68967	207	#endif /* LWIP_ARP */
hexley	0:281d6ff68967	208
hexley	0:281d6ff68967	209	err_t ethernet_input(struct pbuf p, struct netif netif);
hexley	0:281d6ff68967	210
hexley	0:281d6ff68967	211	#define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETHARP_HWADDR_LEN) == 0)
hexley	0:281d6ff68967	212
hexley	0:281d6ff68967	213	extern const struct eth_addr ethbroadcast, ethzero;
hexley	0:281d6ff68967	214
hexley	0:281d6ff68967	215	#ifdef __cplusplus
hexley	0:281d6ff68967	216	}
hexley	0:281d6ff68967	217	#endif
hexley	0:281d6ff68967	218
hexley	0:281d6ff68967	219	#endif /* LWIP_ARP \|\| LWIP_ETHERNET */
hexley	0:281d6ff68967	220
hexley	0:281d6ff68967	221	#endif /* __NETIF_ARP_H__ */

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Type:	Library
Created:	19 Nov 2010
Imports:	44
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

lwip/include/netif/etharp.h@0:281d6ff68967, 2010-11-19 (annotated)

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