1 | /* |
2 | * net/tipc/udp_media.h: Include file for UDP bearer media |
3 | * |
4 | * Copyright (c) 1996-2006, 2013-2016, Ericsson AB |
5 | * Copyright (c) 2005, 2010-2011, 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 | #ifdef CONFIG_TIPC_MEDIA_UDP |
38 | #ifndef _TIPC_UDP_MEDIA_H |
39 | #define _TIPC_UDP_MEDIA_H |
40 | |
41 | #include <linux/ip.h> |
42 | #include <linux/udp.h> |
43 | |
44 | int tipc_udp_nl_bearer_add(struct tipc_bearer *b, struct nlattr *attr); |
45 | int tipc_udp_nl_add_bearer_data(struct tipc_nl_msg *msg, struct tipc_bearer *b); |
46 | int tipc_udp_nl_dump_remoteip(struct sk_buff *skb, struct netlink_callback *cb); |
47 | |
48 | /* check if configured MTU is too low for tipc headers */ |
49 | static inline bool tipc_udp_mtu_bad(u32 mtu) |
50 | { |
51 | if (mtu >= (TIPC_MIN_BEARER_MTU + sizeof(struct iphdr) + |
52 | sizeof(struct udphdr))) |
53 | return false; |
54 | |
55 | pr_warn("MTU too low for tipc bearer\n" ); |
56 | return true; |
57 | } |
58 | |
59 | #endif |
60 | #endif |
61 | |