102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/*
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* net/tipc/eth_media.c: Ethernet bearer support for TIPC
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*
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* Copyright (c) 2001-2007, 2013-2014, Ericsson AB
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* Copyright (c) 2005-2008, 2011-2013, Wind River Systems
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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 are met:
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*
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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. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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#include "core.h"
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#include "bearer.h"
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#define ETH_ADDR_OFFSET 4 /* MAC addr position inside address field */
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/* Convert Ethernet address (media address format) to string */
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static int tipc_eth_addr2str(struct tipc_media_addr *addr,
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char *strbuf, int bufsz)
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{
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if (bufsz < 18) /* 18 = strlen("aa:bb:cc:dd:ee:ff\0") */
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return 1;
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sprintf(strbuf, "%pM", addr->value);
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return 0;
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}
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/* Convert from media address format to discovery message addr format */
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static int tipc_eth_addr2msg(char *msg, struct tipc_media_addr *addr)
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{
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memset(msg, 0, TIPC_MEDIA_ADDR_SIZE);
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msg[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_ETH;
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memcpy(msg + ETH_ADDR_OFFSET, addr->value, ETH_ALEN);
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return 0;
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}
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/* Convert raw mac address format to media addr format */
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static int tipc_eth_raw2addr(struct tipc_bearer *b,
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struct tipc_media_addr *addr,
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char *msg)
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{
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char bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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memset(addr, 0, sizeof(*addr));
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ether_addr_copy(addr->value, msg);
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addr->media_id = TIPC_MEDIA_TYPE_ETH;
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addr->broadcast = !memcmp(addr->value, bcast_mac, ETH_ALEN);
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return 0;
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}
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/* Convert discovery msg addr format to Ethernet media addr format */
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static int tipc_eth_msg2addr(struct tipc_bearer *b,
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struct tipc_media_addr *addr,
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char *msg)
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{
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/* Skip past preamble: */
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msg += ETH_ADDR_OFFSET;
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return tipc_eth_raw2addr(b, addr, msg);
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}
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/* Ethernet media registration info */
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struct tipc_media eth_media_info = {
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.send_msg = tipc_l2_send_msg,
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.enable_media = tipc_enable_l2_media,
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.disable_media = tipc_disable_l2_media,
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.addr2str = tipc_eth_addr2str,
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.addr2msg = tipc_eth_addr2msg,
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.msg2addr = tipc_eth_msg2addr,
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.raw2addr = tipc_eth_raw2addr,
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.priority = TIPC_DEF_LINK_PRI,
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.tolerance = TIPC_DEF_LINK_TOL,
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.window = TIPC_DEF_LINK_WIN,
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.type_id = TIPC_MEDIA_TYPE_ETH,
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.hwaddr_len = ETH_ALEN,
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.name = "eth"
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};
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