| 1 | /* |
| 2 | * net/tipc/eth_media.c: Ethernet bearer support for TIPC |
| 3 | * |
| 4 | * Copyright (c) 2001-2007, 2013-2014, 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 | /* Convert Ethernet address (media address format) to string */ |
| 41 | static int tipc_eth_addr2str(struct tipc_media_addr *addr, |
| 42 | char *strbuf, int bufsz) |
| 43 | { |
| 44 | if (bufsz < 18) /* 18 = strlen("aa:bb:cc:dd:ee:ff\0") */ |
| 45 | return 1; |
| 46 | |
| 47 | sprintf(strbuf, "%pM", addr->value); |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | /* Convert from media address format to discovery message addr format */ |
| 52 | static int tipc_eth_addr2msg(char *msg, struct tipc_media_addr *addr) |
| 53 | { |
| 54 | memset(msg, 0, TIPC_MEDIA_INFO_SIZE); |
| 55 | msg[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_ETH; |
| 56 | memcpy(msg + TIPC_MEDIA_ADDR_OFFSET, addr->value, ETH_ALEN); |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | /* Convert raw mac address format to media addr format */ |
| 61 | static int tipc_eth_raw2addr(struct tipc_bearer *b, |
| 62 | struct tipc_media_addr *addr, |
| 63 | char *msg) |
| 64 | { |
| 65 | char bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
| 66 | |
| 67 | memset(addr, 0, sizeof(*addr)); |
| 68 | ether_addr_copy(addr->value, msg); |
| 69 | addr->media_id = TIPC_MEDIA_TYPE_ETH; |
| 70 | addr->broadcast = !memcmp(addr->value, bcast_mac, ETH_ALEN); |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | /* Convert discovery msg addr format to Ethernet media addr format */ |
| 75 | static int tipc_eth_msg2addr(struct tipc_bearer *b, |
| 76 | struct tipc_media_addr *addr, |
| 77 | char *msg) |
| 78 | { |
| 79 | /* Skip past preamble: */ |
| 80 | msg += TIPC_MEDIA_ADDR_OFFSET; |
| 81 | return tipc_eth_raw2addr(b, addr, msg); |
| 82 | } |
| 83 | |
| 84 | /* Ethernet media registration info */ |
| 85 | struct tipc_media eth_media_info = { |
| 86 | .send_msg = tipc_l2_send_msg, |
| 87 | .enable_media = tipc_enable_l2_media, |
| 88 | .disable_media = tipc_disable_l2_media, |
| 89 | .addr2str = tipc_eth_addr2str, |
| 90 | .addr2msg = tipc_eth_addr2msg, |
| 91 | .msg2addr = tipc_eth_msg2addr, |
| 92 | .raw2addr = tipc_eth_raw2addr, |
| 93 | .priority = TIPC_DEF_LINK_PRI, |
| 94 | .tolerance = TIPC_DEF_LINK_TOL, |
| 95 | .window = TIPC_DEF_LINK_WIN, |
| 96 | .type_id = TIPC_MEDIA_TYPE_ETH, |
| 97 | .hwaddr_len = ETH_ALEN, |
| 98 | .name = "eth" |
| 99 | }; |