| /* |
| * Copyright 2011, Siemens AG |
| * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com> |
| */ |
| |
| /* |
| * Based on patches from Jon Smirl <jonsmirl@gmail.com> |
| * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| /* Jon's code is based on 6lowpan implementation for Contiki which is: |
| * Copyright (c) 2008, Swedish Institute of Computer Science. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the Institute nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #ifndef __6LOWPAN_H__ |
| #define __6LOWPAN_H__ |
| |
| /* need to know address length to manipulate with it */ |
| #define IEEE802154_ALEN 8 |
| |
| #define UIP_802154_SHORTADDR_LEN 2 /* compressed ipv6 address length */ |
| #define UIP_IPH_LEN 40 /* ipv6 fixed header size */ |
| #define UIP_PROTO_UDP 17 /* ipv6 next header value for UDP */ |
| #define UIP_FRAGH_LEN 8 /* ipv6 fragment header size */ |
| |
| /* |
| * ipv6 address based on mac |
| * second bit-flip (Universe/Local) is done according RFC2464 |
| */ |
| #define is_addr_mac_addr_based(a, m) \ |
| ((((a)->s6_addr[8]) == (((m)[0]) ^ 0x02)) && \ |
| (((a)->s6_addr[9]) == (m)[1]) && \ |
| (((a)->s6_addr[10]) == (m)[2]) && \ |
| (((a)->s6_addr[11]) == (m)[3]) && \ |
| (((a)->s6_addr[12]) == (m)[4]) && \ |
| (((a)->s6_addr[13]) == (m)[5]) && \ |
| (((a)->s6_addr[14]) == (m)[6]) && \ |
| (((a)->s6_addr[15]) == (m)[7])) |
| |
| /* ipv6 address is unspecified */ |
| #define is_addr_unspecified(a) \ |
| ((((a)->s6_addr32[0]) == 0) && \ |
| (((a)->s6_addr32[1]) == 0) && \ |
| (((a)->s6_addr32[2]) == 0) && \ |
| (((a)->s6_addr32[3]) == 0)) |
| |
| /* compare ipv6 addresses prefixes */ |
| #define ipaddr_prefixcmp(addr1, addr2, length) \ |
| (memcmp(addr1, addr2, length >> 3) == 0) |
| |
| /* local link, i.e. FE80::/10 */ |
| #define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80)) |
| |
| /* |
| * check whether we can compress the IID to 16 bits, |
| * it's possible for unicast adresses with first 49 bits are zero only. |
| */ |
| #define lowpan_is_iid_16_bit_compressable(a) \ |
| ((((a)->s6_addr16[4]) == 0) && \ |
| (((a)->s6_addr16[5]) == 0) && \ |
| (((a)->s6_addr16[6]) == 0) && \ |
| ((((a)->s6_addr[14]) & 0x80) == 0)) |
| |
| /* multicast address */ |
| #define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF) |
| |
| /* check whether the 112-bit gid of the multicast address is mappable to: */ |
| |
| /* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */ |
| #define lowpan_is_mcast_addr_compressable(a) \ |
| ((((a)->s6_addr16[1]) == 0) && \ |
| (((a)->s6_addr16[2]) == 0) && \ |
| (((a)->s6_addr16[3]) == 0) && \ |
| (((a)->s6_addr16[4]) == 0) && \ |
| (((a)->s6_addr16[5]) == 0) && \ |
| (((a)->s6_addr16[6]) == 0) && \ |
| (((a)->s6_addr[14]) == 0) && \ |
| ((((a)->s6_addr[15]) == 1) || (((a)->s6_addr[15]) == 2))) |
| |
| /* 48 bits, FFXX::00XX:XXXX:XXXX */ |
| #define lowpan_is_mcast_addr_compressable48(a) \ |
| ((((a)->s6_addr16[1]) == 0) && \ |
| (((a)->s6_addr16[2]) == 0) && \ |
| (((a)->s6_addr16[3]) == 0) && \ |
| (((a)->s6_addr16[4]) == 0) && \ |
| (((a)->s6_addr[10]) == 0)) |
| |
| /* 32 bits, FFXX::00XX:XXXX */ |
| #define lowpan_is_mcast_addr_compressable32(a) \ |
| ((((a)->s6_addr16[1]) == 0) && \ |
| (((a)->s6_addr16[2]) == 0) && \ |
| (((a)->s6_addr16[3]) == 0) && \ |
| (((a)->s6_addr16[4]) == 0) && \ |
| (((a)->s6_addr16[5]) == 0) && \ |
| (((a)->s6_addr[12]) == 0)) |
| |
| /* 8 bits, FF02::00XX */ |
| #define lowpan_is_mcast_addr_compressable8(a) \ |
| ((((a)->s6_addr[1]) == 2) && \ |
| (((a)->s6_addr16[1]) == 0) && \ |
| (((a)->s6_addr16[2]) == 0) && \ |
| (((a)->s6_addr16[3]) == 0) && \ |
| (((a)->s6_addr16[4]) == 0) && \ |
| (((a)->s6_addr16[5]) == 0) && \ |
| (((a)->s6_addr16[6]) == 0) && \ |
| (((a)->s6_addr[14]) == 0)) |
| |
| #define lowpan_is_addr_broadcast(a) \ |
| ((((a)[0]) == 0xFF) && \ |
| (((a)[1]) == 0xFF) && \ |
| (((a)[2]) == 0xFF) && \ |
| (((a)[3]) == 0xFF) && \ |
| (((a)[4]) == 0xFF) && \ |
| (((a)[5]) == 0xFF) && \ |
| (((a)[6]) == 0xFF) && \ |
| (((a)[7]) == 0xFF)) |
| |
| #define LOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */ |
| #define LOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */ |
| #define LOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */ |
| #define LOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */ |
| #define LOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */ |
| |
| #define LOWPAN_DISPATCH_MASK 0xf8 /* 11111000 */ |
| |
| #define LOWPAN_FRAG_TIMEOUT (HZ * 60) /* time-out 60 sec */ |
| |
| #define LOWPAN_FRAG1_HEAD_SIZE 0x4 |
| #define LOWPAN_FRAGN_HEAD_SIZE 0x5 |
| |
| /* |
| * According IEEE802.15.4 standard: |
| * - MTU is 127 octets |
| * - maximum MHR size is 37 octets |
| * - MFR size is 2 octets |
| * |
| * so minimal payload size that we may guarantee is: |
| * MTU - MHR - MFR = 88 octets |
| */ |
| #define LOWPAN_FRAG_SIZE 88 |
| |
| /* |
| * Values of fields within the IPHC encoding first byte |
| * (C stands for compressed and I for inline) |
| */ |
| #define LOWPAN_IPHC_TF 0x18 |
| |
| #define LOWPAN_IPHC_FL_C 0x10 |
| #define LOWPAN_IPHC_TC_C 0x08 |
| #define LOWPAN_IPHC_NH_C 0x04 |
| #define LOWPAN_IPHC_TTL_1 0x01 |
| #define LOWPAN_IPHC_TTL_64 0x02 |
| #define LOWPAN_IPHC_TTL_255 0x03 |
| #define LOWPAN_IPHC_TTL_I 0x00 |
| |
| |
| /* Values of fields within the IPHC encoding second byte */ |
| #define LOWPAN_IPHC_CID 0x80 |
| |
| #define LOWPAN_IPHC_SAC 0x40 |
| #define LOWPAN_IPHC_SAM_00 0x00 |
| #define LOWPAN_IPHC_SAM_01 0x10 |
| #define LOWPAN_IPHC_SAM_10 0x20 |
| #define LOWPAN_IPHC_SAM 0x30 |
| |
| #define LOWPAN_IPHC_SAM_BIT 4 |
| |
| #define LOWPAN_IPHC_M 0x08 |
| #define LOWPAN_IPHC_DAC 0x04 |
| #define LOWPAN_IPHC_DAM_00 0x00 |
| #define LOWPAN_IPHC_DAM_01 0x01 |
| #define LOWPAN_IPHC_DAM_10 0x02 |
| #define LOWPAN_IPHC_DAM_11 0x03 |
| |
| #define LOWPAN_IPHC_DAM_BIT 0 |
| /* |
| * LOWPAN_UDP encoding (works together with IPHC) |
| */ |
| #define LOWPAN_NHC_UDP_MASK 0xF8 |
| #define LOWPAN_NHC_UDP_ID 0xF0 |
| #define LOWPAN_NHC_UDP_CHECKSUMC 0x04 |
| #define LOWPAN_NHC_UDP_CHECKSUMI 0x00 |
| |
| #define LOWPAN_NHC_UDP_4BIT_PORT 0xF0B0 |
| #define LOWPAN_NHC_UDP_4BIT_MASK 0xFFF0 |
| #define LOWPAN_NHC_UDP_8BIT_PORT 0xF000 |
| #define LOWPAN_NHC_UDP_8BIT_MASK 0xFF00 |
| |
| /* values for port compression, _with checksum_ ie bit 5 set to 0 */ |
| #define LOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */ |
| #define LOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline, |
| dest = 0xF0 + 8 bit inline */ |
| #define LOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline, |
| dest = 16 bit inline */ |
| #define LOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */ |
| |
| #endif /* __6LOWPAN_H__ */ |