2 * The olsr.org Optimized Link-State Routing daemon(olsrd)
3 * Copyright (c) 2004-2009, the olsr.org team - see HISTORY file
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
16 * * Neither the name of olsr.org, olsrd nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
33 * Visit http://www.olsr.org for more information.
35 * If you find this software useful feel free to make a donation
36 * to the project. For more information see the website or contact
37 * the copyright holders.
42 #ifndef _MDNS_PACKET_H
43 #define _MDNS_PACKET_H
47 #include <net/if.h> /* IFNAMSIZ, IFHWADDRLEN */
48 #include <sys/types.h> /* u_int8_t, u_int16_t */
50 /* BMF-encapsulated packets are Ethernet-IP-UDP packets, which start
51 * with a 8-bytes BMF header (struct TEncapHeader), followed by the
52 * encapsulated Ethernet-IP packet itself */
55 /* Use a standard Type-Length-Value (TLV) element */
58 u_int16_t reserved; /* Always 0 */
60 } __attribute__ ((__packed__));
62 #define ENCAP_HDR_LEN ((int)sizeof(struct TEncapHeader))
63 #define BMF_ENCAP_TYPE 1
64 #define BMF_ENCAP_LEN 6
69 } __attribute__ ((__packed__));
71 int IsIpFragment(unsigned char *ipPacket);
72 u_int16_t GetIpTotalLength(unsigned char *ipPacket);
73 unsigned int GetIpHeaderLength(unsigned char *ipPacket);
74 u_int8_t GetTtl(unsigned char *ipPacket);
75 void SaveTtlAndChecksum(unsigned char *ipPacket, struct TSaveTtl *sttl);
76 void RestoreTtlAndChecksum(unsigned char *ipPacket, struct TSaveTtl *sttl);
77 void DecreaseTtlAndUpdateHeaderChecksum(unsigned char *ipPacket);
78 struct ip *GetIpHeader(unsigned char *encapsulationUdpData);
79 unsigned char *GetIpPacket(unsigned char *encapsulationUdpData);
81 #endif /* _MDNS_PACKET_H */