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TOMOYO Linux Cross Reference
Linux/net/tipc/udp_media.h

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  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 

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