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(buf: strbuf, fmt: "%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 | const char *msg) |
64 | { |
65 | memset(addr, 0, sizeof(*addr)); |
66 | ether_addr_copy(dst: addr->value, src: msg); |
67 | addr->media_id = TIPC_MEDIA_TYPE_ETH; |
68 | addr->broadcast = is_broadcast_ether_addr(addr: addr->value); |
69 | return 0; |
70 | } |
71 | |
72 | /* Convert discovery msg addr format to Ethernet media addr format */ |
73 | static int tipc_eth_msg2addr(struct tipc_bearer *b, |
74 | struct tipc_media_addr *addr, |
75 | char *msg) |
76 | { |
77 | /* Skip past preamble: */ |
78 | msg += TIPC_MEDIA_ADDR_OFFSET; |
79 | return tipc_eth_raw2addr(b, addr, msg); |
80 | } |
81 | |
82 | /* Ethernet media registration info */ |
83 | struct tipc_media eth_media_info = { |
84 | .send_msg = tipc_l2_send_msg, |
85 | .enable_media = tipc_enable_l2_media, |
86 | .disable_media = tipc_disable_l2_media, |
87 | .addr2str = tipc_eth_addr2str, |
88 | .addr2msg = tipc_eth_addr2msg, |
89 | .msg2addr = tipc_eth_msg2addr, |
90 | .raw2addr = tipc_eth_raw2addr, |
91 | .priority = TIPC_DEF_LINK_PRI, |
92 | .tolerance = TIPC_DEF_LINK_TOL, |
93 | .min_win = TIPC_DEF_LINK_WIN, |
94 | .max_win = TIPC_MAX_LINK_WIN, |
95 | .type_id = TIPC_MEDIA_TYPE_ETH, |
96 | .hwaddr_len = ETH_ALEN, |
97 | .name = "eth" |
98 | }; |
99 | |