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156 lines
5.3 KiB
C
156 lines
5.3 KiB
C
/* $Id: ethernet.h,v 1.6 2007/02/15 01:27:13 fredette Exp $ */
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/* tme/generic/ethernet.h - header file for generic ethernet support: */
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/*
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* Copyright (c) 2003 Matt Fredette
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Matt Fredette.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TME_GENERIC_ETHERNET_H
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#define _TME_GENERIC_ETHERNET_H
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#include <tme/common.h>
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_TME_RCSID("$Id: ethernet.h,v 1.6 2007/02/15 01:27:13 fredette Exp $");
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/* includes: */
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#include <tme/element.h>
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/* macros: */
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/* the size of an address: */
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#define TME_ETHERNET_ADDR_SIZE (6)
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/* the size of a length field: */
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#define TME_ETHERNET_LENGTH_SIZE (2)
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/* the size of a CRC: */
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#define TME_ETHERNET_CRC_SIZE (4)
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/* the size of an Ethernet header: */
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#define TME_ETHERNET_HEADER_SIZE (TME_ETHERNET_ADDR_SIZE + TME_ETHERNET_ADDR_SIZE + TME_ETHERNET_LENGTH_SIZE)
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/* the minimum and maximum sizes of an Ethernet frame, including the
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complete header and CRC: */
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#define TME_ETHERNET_FRAME_MIN (64)
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#define TME_ETHERNET_FRAME_MAX (1518)
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/* Ethernet types: */
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#define TME_ETHERNET_TYPE_IPV4 (0x0800)
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#define TME_ETHERNET_TYPE_ARP (0x0806)
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#define TME_ETHERNET_TYPE_RARP (0x8035)
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/* Ethernet config flags: */
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#define TME_ETHERNET_CONFIG_NORMAL (0)
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#define TME_ETHERNET_CONFIG_PROMISC TME_BIT(0)
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/* Ethernet control flags: */
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#define TME_ETHERNET_CTRL_COLL_INPUT TME_BIT(0)
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#define TME_ETHERNET_CTRL_COLL_OUTPUT TME_BIT(1)
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#define TME_ETHERNET_CTRL_OK_READ TME_BIT(2)
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/* Ethernet read flags: */
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#define TME_ETHERNET_READ_SPECIFIC (0)
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#define TME_ETHERNET_READ_NEXT TME_BIT(0)
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#define TME_ETHERNET_READ_PEEK TME_BIT(1)
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/* types: */
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/* an ethernet frame identifier: */
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typedef tme_uint32_t tme_ethernet_fid_t;
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/* an ethernet header: */
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struct tme_ethernet_header {
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/* the destination address: */
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tme_uint8_t tme_ethernet_header_dst[TME_ETHERNET_ADDR_SIZE];
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/* the source address: */
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tme_uint8_t tme_ethernet_header_src[TME_ETHERNET_ADDR_SIZE];
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/* the type: */
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tme_uint8_t tme_ethernet_header_type[2];
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};
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/* a ethernet configuration: */
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struct tme_ethernet_config {
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/* the config flags: */
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tme_uint32_t tme_ethernet_config_flags;
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/* the set of specific Ethernet addresses to receive packets for: */
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unsigned int tme_ethernet_config_addr_count;
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_tme_const tme_uint8_t **tme_ethernet_config_addrs;
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};
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/* an ethernet frame chunk: */
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struct tme_ethernet_frame_chunk {
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/* the next chunk in the frame: */
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struct tme_ethernet_frame_chunk *tme_ethernet_frame_chunk_next;
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/* a pointer to the bytes in this chunk: */
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tme_uint8_t *tme_ethernet_frame_chunk_bytes;
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/* the number of bytes in this chunk: */
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unsigned int tme_ethernet_frame_chunk_bytes_count;
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};
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/* a ethernet connection: */
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struct tme_ethernet_connection {
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/* the generic connection side: */
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struct tme_connection tme_ethernet_connection;
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/* this is called when the ethernet configuration changes: */
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int (*tme_ethernet_connection_config) _TME_P((struct tme_ethernet_connection *,
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struct tme_ethernet_config *));
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/* this is called when control flags change: */
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int (*tme_ethernet_connection_ctrl) _TME_P((struct tme_ethernet_connection *,
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unsigned int));
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/* this is called to read data: */
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int (*tme_ethernet_connection_read) _TME_P((struct tme_ethernet_connection *,
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tme_ethernet_fid_t *,
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struct tme_ethernet_frame_chunk *,
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unsigned int));
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};
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/* globals: */
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extern _tme_const tme_uint8_t tme_ethernet_addr_broadcast[TME_ETHERNET_ADDR_SIZE];
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/* prototypes: */
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int tme_ethernet_addr_parse _TME_P((_tme_const char *, tme_uint8_t *));
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int tme_ethernet_connection_score _TME_P((struct tme_connection *, unsigned int *));
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unsigned int tme_ethernet_chunks_copy _TME_P((_tme_const struct tme_ethernet_frame_chunk *, _tme_const struct tme_ethernet_frame_chunk *));
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tme_uint32_t tme_ethernet_crc32_el _TME_P((_tme_const tme_uint8_t *, unsigned int));
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#endif /* !_TME_GENERIC_ETHERNET_H */
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