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Diffstat (limited to 'net/ieee802154/6lowpan.h')
| -rw-r--r-- | net/ieee802154/6lowpan.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/net/ieee802154/6lowpan.h b/net/ieee802154/6lowpan.h new file mode 100644 index 00000000..aeff3f31 --- /dev/null +++ b/net/ieee802154/6lowpan.h @@ -0,0 +1,235 @@ +/* + * 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]) == 0x80FE) + +/* + * 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__ */ |