1 /* 2 * net/tipc/eth_media.c: Ethernet bearer support for TIPC 3 * 4 * Copyright (c) 2001-2007, 2013, Ericsson AB 5 * Copyright (c) 2005-2008, 2011-2013, Wind River Systems 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the names of the copyright holders nor the names of its 17 * contributors may be used to endorse or promote products derived from 18 * this software without specific prior written permission. 19 * 20 * Alternatively, this software may be distributed under the terms of the 21 * GNU General Public License ("GPL") version 2 as published by the Free 22 * Software Foundation. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include "core.h" 38 #include "bearer.h" 39 40 #define ETH_ADDR_OFFSET 4 /* message header offset of MAC address */ 41 42 /* convert Ethernet address to string */ 43 static int tipc_eth_addr2str(struct tipc_media_addr *a, char *str_buf, 44 int str_size) 45 { 46 if (str_size < 18) /* 18 = strlen("aa:bb:cc:dd:ee:ff\0") */ 47 return 1; 48 49 sprintf(str_buf, "%pM", a->value); 50 return 0; 51 } 52 53 /* convert Ethernet address format to message header format */ 54 static int tipc_eth_addr2msg(struct tipc_media_addr *a, char *msg_area) 55 { 56 memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE); 57 msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_ETH; 58 memcpy(msg_area + ETH_ADDR_OFFSET, a->value, ETH_ALEN); 59 return 0; 60 } 61 62 /* convert message header address format to Ethernet format */ 63 static int tipc_eth_msg2addr(const struct tipc_bearer *tb_ptr, 64 struct tipc_media_addr *a, char *msg_area) 65 { 66 if (msg_area[TIPC_MEDIA_TYPE_OFFSET] != TIPC_MEDIA_TYPE_ETH) 67 return 1; 68 69 tipc_l2_media_addr_set(tb_ptr, a, msg_area + ETH_ADDR_OFFSET); 70 return 0; 71 } 72 73 /* Ethernet media registration info */ 74 struct tipc_media eth_media_info = { 75 .send_msg = tipc_l2_send_msg, 76 .enable_media = tipc_enable_l2_media, 77 .disable_media = tipc_disable_l2_media, 78 .addr2str = tipc_eth_addr2str, 79 .addr2msg = tipc_eth_addr2msg, 80 .msg2addr = tipc_eth_msg2addr, 81 .priority = TIPC_DEF_LINK_PRI, 82 .tolerance = TIPC_DEF_LINK_TOL, 83 .window = TIPC_DEF_LINK_WIN, 84 .type_id = TIPC_MEDIA_TYPE_ETH, 85 .hwaddr_len = ETH_ALEN, 86 .name = "eth" 87 }; 88 89