6lowpan.h revision 841a5ec72c028432f716670c4a7c2e1b70ee1341
144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * Copyright 2011, Siemens AG 344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com> 444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * Based on patches from Jon Smirl <jonsmirl@gmail.com> 844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com> 944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 1044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * This program is free software; you can redistribute it and/or modify 1144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * it under the terms of the GNU General Public License version 2 1244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * as published by the Free Software Foundation. 1344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 1444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * This program is distributed in the hope that it will be useful, 1544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * but WITHOUT ANY WARRANTY; without even the implied warranty of 1644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * GNU General Public License for more details. 1844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 1944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * You should have received a copy of the GNU General Public License along 2044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * with this program; if not, write to the Free Software Foundation, Inc., 2144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 2244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 2344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 2444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* Jon's code is based on 6lowpan implementation for Contiki which is: 2544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * Copyright (c) 2008, Swedish Institute of Computer Science. 2644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * All rights reserved. 2744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 2844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * Redistribution and use in source and binary forms, with or without 2944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * modification, are permitted provided that the following conditions 3044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * are met: 3144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 1. Redistributions of source code must retain the above copyright 3244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * notice, this list of conditions and the following disclaimer. 3344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 2. Redistributions in binary form must reproduce the above copyright 3444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * notice, this list of conditions and the following disclaimer in the 3544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * documentation and/or other materials provided with the distribution. 3644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 3. Neither the name of the Institute nor the names of its contributors 3744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * may be used to endorse or promote products derived from this software 3844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * without specific prior written permission. 3944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * 4044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 4144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 4444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 4944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * SUCH DAMAGE. 5144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 5244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 5344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#ifndef __6LOWPAN_H__ 5444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define __6LOWPAN_H__ 5544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 5644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define UIP_802154_SHORTADDR_LEN 2 /* compressed ipv6 address length */ 5744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define UIP_IPH_LEN 40 /* ipv6 fixed header size */ 5844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define UIP_PROTO_UDP 17 /* ipv6 next header value for UDP */ 5944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define UIP_FRAGH_LEN 8 /* ipv6 fragment header size */ 6044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 6144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 6244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * ipv6 address based on mac 6344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * second bit-flip (Universe/Local) is done according RFC2464 6444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 6544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define is_addr_mac_addr_based(a, m) \ 6644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr[8]) == (((m)[0]) ^ 0x02)) && \ 6744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[9]) == (m)[1]) && \ 6844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[10]) == (m)[2]) && \ 6944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[11]) == (m)[3]) && \ 7044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[12]) == (m)[4]) && \ 7144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[13]) == (m)[5]) && \ 7244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[14]) == (m)[6]) && \ 7344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[15]) == (m)[7])) 7444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 7544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* ipv6 address is unspecified */ 7644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define is_addr_unspecified(a) \ 7744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr32[0]) == 0) && \ 7844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr32[1]) == 0) && \ 7944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr32[2]) == 0) && \ 8044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr32[3]) == 0)) 8144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 8244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* compare ipv6 addresses prefixes */ 8344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define ipaddr_prefixcmp(addr1, addr2, length) \ 8444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (memcmp(addr1, addr2, length >> 3) == 0) 8544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 8644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* local link, i.e. FE80::/10 */ 879026c4927254f5bea695cc3ef2e255280e6a3011YOSHIFUJI Hideaki / 吉藤英明#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80)) 8844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 8944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 9044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * check whether we can compress the IID to 16 bits, 9144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * it's possible for unicast adresses with first 49 bits are zero only. 9244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 9344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define lowpan_is_iid_16_bit_compressable(a) \ 9444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr16[4]) == 0) && \ 958d879a3f9856fe6c6e27853a96c0beaed03acb2cTony Cheneau (((a)->s6_addr[10]) == 0) && \ 968d879a3f9856fe6c6e27853a96c0beaed03acb2cTony Cheneau (((a)->s6_addr[11]) == 0xff) && \ 978d879a3f9856fe6c6e27853a96c0beaed03acb2cTony Cheneau (((a)->s6_addr[12]) == 0xfe) && \ 988d879a3f9856fe6c6e27853a96c0beaed03acb2cTony Cheneau (((a)->s6_addr[13]) == 0)) 9944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 10044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* multicast address */ 10144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF) 10244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 10344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* check whether the 112-bit gid of the multicast address is mappable to: */ 10444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 10544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */ 10644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define lowpan_is_mcast_addr_compressable(a) \ 10744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr16[1]) == 0) && \ 10844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[2]) == 0) && \ 10944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[3]) == 0) && \ 11044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[4]) == 0) && \ 11144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[5]) == 0) && \ 11244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[6]) == 0) && \ 11344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[14]) == 0) && \ 11444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr[15]) == 1) || (((a)->s6_addr[15]) == 2))) 11544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 11644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 48 bits, FFXX::00XX:XXXX:XXXX */ 11744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define lowpan_is_mcast_addr_compressable48(a) \ 11844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr16[1]) == 0) && \ 11944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[2]) == 0) && \ 12044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[3]) == 0) && \ 12144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[4]) == 0) && \ 12244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[10]) == 0)) 12344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 12444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 32 bits, FFXX::00XX:XXXX */ 12544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define lowpan_is_mcast_addr_compressable32(a) \ 12644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr16[1]) == 0) && \ 12744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[2]) == 0) && \ 12844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[3]) == 0) && \ 12944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[4]) == 0) && \ 13044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[5]) == 0) && \ 13144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[12]) == 0)) 13244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 13344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 8 bits, FF02::00XX */ 13444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define lowpan_is_mcast_addr_compressable8(a) \ 13544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)->s6_addr[1]) == 2) && \ 13644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[1]) == 0) && \ 13744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[2]) == 0) && \ 13844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[3]) == 0) && \ 13944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[4]) == 0) && \ 14044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[5]) == 0) && \ 14144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr16[6]) == 0) && \ 14244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)->s6_addr[14]) == 0)) 14344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 14444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define lowpan_is_addr_broadcast(a) \ 14544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov ((((a)[0]) == 0xFF) && \ 14644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[1]) == 0xFF) && \ 14744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[2]) == 0xFF) && \ 14844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[3]) == 0xFF) && \ 14944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[4]) == 0xFF) && \ 15044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[5]) == 0xFF) && \ 15144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[6]) == 0xFF) && \ 15244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov (((a)[7]) == 0xFF)) 15344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 15444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */ 15544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */ 15644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */ 15744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */ 15844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */ 15944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 160719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com#define LOWPAN_DISPATCH_MASK 0xf8 /* 11111000 */ 161719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com 162719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com#define LOWPAN_FRAG_TIMEOUT (HZ * 60) /* time-out 60 sec */ 163719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com 164719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com#define LOWPAN_FRAG1_HEAD_SIZE 0x4 165719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com#define LOWPAN_FRAGN_HEAD_SIZE 0x5 166719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com 167719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com/* 168719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * According IEEE802.15.4 standard: 169719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * - MTU is 127 octets 170719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * - maximum MHR size is 37 octets 171719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * - MFR size is 2 octets 172719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * 173719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * so minimal payload size that we may guarantee is: 174719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com * MTU - MHR - MFR = 88 octets 175719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com */ 176719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com#define LOWPAN_FRAG_SIZE 88 177719269afbc69ab96339aad6c2d3b32f7d8311146alex.bluesman.smirnov@gmail.com 17844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 17944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * Values of fields within the IPHC encoding first byte 18044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * (C stands for compressed and I for inline) 18144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 18244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_TF 0x18 18344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 18444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_FL_C 0x10 18544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_TC_C 0x08 18644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_NH_C 0x04 18744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_TTL_1 0x01 18844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_TTL_64 0x02 18944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_TTL_255 0x03 19044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_TTL_I 0x00 19144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 19244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 19344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* Values of fields within the IPHC encoding second byte */ 19444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_CID 0x80 19544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 196ce2463b283a0cb63e0e4de5e7d971b4c92be542aAlexander Aring#define LOWPAN_IPHC_ADDR_00 0x00 197ce2463b283a0cb63e0e4de5e7d971b4c92be542aAlexander Aring#define LOWPAN_IPHC_ADDR_01 0x01 198ce2463b283a0cb63e0e4de5e7d971b4c92be542aAlexander Aring#define LOWPAN_IPHC_ADDR_02 0x02 199ce2463b283a0cb63e0e4de5e7d971b4c92be542aAlexander Aring#define LOWPAN_IPHC_ADDR_03 0x03 200ce2463b283a0cb63e0e4de5e7d971b4c92be542aAlexander Aring 20144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_SAC 0x40 20244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_SAM 0x30 20344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 20444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_SAM_BIT 4 20544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 20644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_M 0x08 20744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_DAC 0x04 20844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_DAM_00 0x00 20944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_DAM_01 0x01 21044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_DAM_10 0x02 21144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_DAM_11 0x03 21244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 21344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_IPHC_DAM_BIT 0 21444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* 21544331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov * LOWPAN_UDP encoding (works together with IPHC) 21644331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov */ 21744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_MASK 0xF8 21844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_ID 0xF0 21944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_CHECKSUMC 0x04 22044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_CHECKSUMI 0x00 22144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 2223bd5b958c2a2dd1a9b4c8d21e75fb47b062fc941alex.bluesman.smirnov@gmail.com#define LOWPAN_NHC_UDP_4BIT_PORT 0xF0B0 2233bd5b958c2a2dd1a9b4c8d21e75fb47b062fc941alex.bluesman.smirnov@gmail.com#define LOWPAN_NHC_UDP_4BIT_MASK 0xFFF0 2243bd5b958c2a2dd1a9b4c8d21e75fb47b062fc941alex.bluesman.smirnov@gmail.com#define LOWPAN_NHC_UDP_8BIT_PORT 0xF000 2253bd5b958c2a2dd1a9b4c8d21e75fb47b062fc941alex.bluesman.smirnov@gmail.com#define LOWPAN_NHC_UDP_8BIT_MASK 0xFF00 2263bd5b958c2a2dd1a9b4c8d21e75fb47b062fc941alex.bluesman.smirnov@gmail.com 22744331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov/* values for port compression, _with checksum_ ie bit 5 set to 0 */ 22844331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */ 22944331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline, 23044331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov dest = 0xF0 + 8 bit inline */ 23144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline, 23244331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov dest = 16 bit inline */ 23344331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#define LOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */ 23444331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov 235841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring#ifdef DEBUG 236841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring/* print data in line */ 237841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aringstatic inline void raw_dump_inline(const char *caller, char *msg, 238841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring unsigned char *buf, int len) 239841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring{ 240841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring if (msg) 241841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring pr_debug("%s():%s: ", caller, msg); 242841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring 243841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, buf, len, false); 244841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring} 245841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring 246841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring/* print data in a table format: 247841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring * 248841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring * addr: xx xx xx xx xx xx 249841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring * addr: xx xx xx xx xx xx 250841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring * ... 251841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring */ 252841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aringstatic inline void raw_dump_table(const char *caller, char *msg, 253841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring unsigned char *buf, int len) 254841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring{ 255841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring if (msg) 256841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring pr_debug("%s():%s:\n", caller, msg); 257841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring 258841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring print_hex_dump_debug("\t", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false); 259841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring} 260841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring#else 261841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aringstatic inline void raw_dump_table(const char *caller, char *msg, 262841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring unsigned char *buf, int len) { } 263841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aringstatic inline void raw_dump_inline(const char *caller, char *msg, 264841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring unsigned char *buf, int len) { } 265841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring#endif 266841a5ec72c028432f716670c4a7c2e1b70ee1341Alexander Aring 2678df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanenstatic inline int lowpan_fetch_skb_u8(struct sk_buff *skb, u8 *val) 2688df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen{ 2698df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen if (unlikely(!pskb_may_pull(skb, 1))) 2708df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen return -EINVAL; 2718df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 2728df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen *val = skb->data[0]; 2738df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen skb_pull(skb, 1); 2748df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 2758df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen return 0; 2768df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen} 2778df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 2788df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanenstatic inline int lowpan_fetch_skb_u16(struct sk_buff *skb, u16 *val) 2798df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen{ 2808df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen if (unlikely(!pskb_may_pull(skb, 2))) 2818df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen return -EINVAL; 2828df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 2838df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen *val = (skb->data[0] << 8) | skb->data[1]; 2848df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen skb_pull(skb, 2); 2858df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 2868df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen return 0; 2878df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen} 2888df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 2894666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aringstatic inline bool lowpan_fetch_skb(struct sk_buff *skb, 2904666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring void *data, const unsigned int len) 2914666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring{ 2924666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring if (unlikely(!pskb_may_pull(skb, len))) 2934666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring return true; 2944666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring 2954666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring skb_copy_from_linear_data(skb, data, len); 2964666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring skb_pull(skb, len); 2974666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring 2984666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring return false; 2994666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring} 3004666669fc3b83f0d01b08c6b17432563f2eedcbaAlexander Aring 3018df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanentypedef int (*skb_delivery_cb)(struct sk_buff *skb, struct net_device *dev); 3028df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 3038df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanenint lowpan_process_data(struct sk_buff *skb, struct net_device *dev, 3048df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen const u8 *saddr, const u8 saddr_type, const u8 saddr_len, 3058df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen const u8 *daddr, const u8 daddr_type, const u8 daddr_len, 3068df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen u8 iphc0, u8 iphc1, skb_delivery_cb skb_deliver); 3078df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanenint lowpan_header_compress(struct sk_buff *skb, struct net_device *dev, 3088df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen unsigned short type, const void *_daddr, 3098df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen const void *_saddr, unsigned int len); 3108df8c56a5abc70af5862aa7cac2875aeeb17a42bJukka Rissanen 31144331fe2aa0d7eed54e68484df58e9e00aee0f6eAlexander Smirnov#endif /* __6LOWPAN_H__ */ 312