343 lines
12 KiB
C
343 lines
12 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Header file for the 6lowpan implementation
|
|
* (RFC4944 and draft-hui-6lowpan-hc-01)
|
|
* \author Adam Dunkels <adam@sics.se>
|
|
* \author Nicolas Tsiftes <nvt@sics.se>
|
|
* \author Niclas Finne <nfi@sics.se>
|
|
* \author Mathilde Durvy <mdurvy@cisco.com>
|
|
* \author Julien Abeille <jabeille@cisco.com>
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup sicslowpan
|
|
* @{
|
|
*/
|
|
|
|
#ifndef SICSLOWPAN_H_
|
|
#define SICSLOWPAN_H_
|
|
|
|
#include "net/ip/uip.h"
|
|
#include "net/mac/mac.h"
|
|
|
|
/**
|
|
* \name General sicslowpan defines
|
|
* @{
|
|
*/
|
|
/* Min and Max compressible UDP ports - HC06 */
|
|
#define SICSLOWPAN_UDP_4_BIT_PORT_MIN 0xF0B0
|
|
#define SICSLOWPAN_UDP_4_BIT_PORT_MAX 0xF0BF /* F0B0 + 15 */
|
|
#define SICSLOWPAN_UDP_8_BIT_PORT_MIN 0xF000
|
|
#define SICSLOWPAN_UDP_8_BIT_PORT_MAX 0xF0FF /* F000 + 255 */
|
|
|
|
/** @} */
|
|
|
|
/**
|
|
* \name 6lowpan compressions
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_COMPRESSION_IPV6 0 /* No compression */
|
|
#define SICSLOWPAN_COMPRESSION_IPHC 1 /* RFC 6282 */
|
|
#define SICSLOWPAN_COMPRESSION_6LORH 2 /* RFC 8025 for paging dispatch,
|
|
* draft-ietf-6lo-routin-dispatch-05 for 6LoRH. 6LoRH is not
|
|
* implemented yet -- only support for paging dispatch. */
|
|
/** @} */
|
|
|
|
/**
|
|
* \name 6lowpan dispatches
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
|
|
#define SICSLOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
|
|
#define SICSLOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */
|
|
#define SICSLOWPAN_DISPATCH_IPHC_MASK 0xe0
|
|
#define SICSLOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
|
|
#define SICSLOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
|
|
#define SICSLOWPAN_DISPATCH_FRAG_MASK 0xf8
|
|
#define SICSLOWPAN_DISPATCH_PAGING 0xf0 /* 1111xxxx */
|
|
#define SICSLOWPAN_DISPATCH_PAGING_MASK 0xf0
|
|
/** @} */
|
|
|
|
/** \name HC1 encoding
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_HC1_NH_UDP 0x02
|
|
#define SICSLOWPAN_HC1_NH_TCP 0x06
|
|
#define SICSLOWPAN_HC1_NH_ICMP6 0x04
|
|
/** @} */
|
|
|
|
/** \name HC_UDP encoding (works together with HC1)
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_HC_UDP_ALL_C 0xE0
|
|
/** @} */
|
|
|
|
/**
|
|
* \name IPHC encoding
|
|
* @{
|
|
*/
|
|
/*
|
|
* Values of fields within the IPHC encoding first byte
|
|
* (C stands for compressed and I for inline)
|
|
*/
|
|
#define SICSLOWPAN_IPHC_FL_C 0x10
|
|
#define SICSLOWPAN_IPHC_TC_C 0x08
|
|
#define SICSLOWPAN_IPHC_NH_C 0x04
|
|
#define SICSLOWPAN_IPHC_TTL_1 0x01
|
|
#define SICSLOWPAN_IPHC_TTL_64 0x02
|
|
#define SICSLOWPAN_IPHC_TTL_255 0x03
|
|
#define SICSLOWPAN_IPHC_TTL_I 0x00
|
|
|
|
|
|
/* Values of fields within the IPHC encoding second byte */
|
|
#define SICSLOWPAN_IPHC_CID 0x80
|
|
|
|
#define SICSLOWPAN_IPHC_SAC 0x40
|
|
#define SICSLOWPAN_IPHC_SAM_00 0x00
|
|
#define SICSLOWPAN_IPHC_SAM_01 0x10
|
|
#define SICSLOWPAN_IPHC_SAM_10 0x20
|
|
#define SICSLOWPAN_IPHC_SAM_11 0x30
|
|
|
|
#define SICSLOWPAN_IPHC_SAM_BIT 4
|
|
|
|
#define SICSLOWPAN_IPHC_M 0x08
|
|
#define SICSLOWPAN_IPHC_DAC 0x04
|
|
#define SICSLOWPAN_IPHC_DAM_00 0x00
|
|
#define SICSLOWPAN_IPHC_DAM_01 0x01
|
|
#define SICSLOWPAN_IPHC_DAM_10 0x02
|
|
#define SICSLOWPAN_IPHC_DAM_11 0x03
|
|
|
|
#define SICSLOWPAN_IPHC_DAM_BIT 0
|
|
|
|
/* Link local context number */
|
|
#define SICSLOWPAN_IPHC_ADDR_CONTEXT_LL 0
|
|
/* 16-bit multicast addresses compression */
|
|
#define SICSLOWPAN_IPHC_MCAST_RANGE 0xA0
|
|
/** @} */
|
|
|
|
/* NHC_EXT_HDR */
|
|
#define SICSLOWPAN_NHC_MASK 0xF0
|
|
#define SICSLOWPAN_NHC_EXT_HDR 0xE0
|
|
#define SICSLOWPAN_NHC_BIT 0x01
|
|
|
|
/* The header values */
|
|
#define SICSLOWPAN_NHC_ETX_HDR_HBHO 0x00
|
|
#define SICSLOWPAN_NHC_ETX_HDR_ROUTING 0x01
|
|
#define SICSLOWPAN_NHC_ETX_HDR_FRAG 0x02
|
|
#define SICSLOWPAN_NHC_ETX_HDR_DESTO 0x03
|
|
#define SICSLOWPAN_NHC_ETX_HDR_MOH 0x04
|
|
#define SICSLOWPAN_NHC_ETX_HDR_IPV6 0x07
|
|
|
|
/**
|
|
* \name LOWPAN_UDP encoding (works together with IPHC)
|
|
* @{
|
|
*/
|
|
/**
|
|
* \name LOWPAN_UDP encoding (works together with IPHC)
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_NHC_UDP_MASK 0xF8
|
|
#define SICSLOWPAN_NHC_UDP_ID 0xF0
|
|
#define SICSLOWPAN_NHC_UDP_CHECKSUMC 0x04
|
|
#define SICSLOWPAN_NHC_UDP_CHECKSUMI 0x00
|
|
/* values for port compression, _with checksum_ ie bit 5 set to 0 */
|
|
#define SICSLOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */
|
|
#define SICSLOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline, dest = 0xF0 + 8 bit inline */
|
|
#define SICSLOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline, dest = 16 bit inline */
|
|
#define SICSLOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */
|
|
/** @} */
|
|
|
|
|
|
/**
|
|
* \name The 6lowpan "headers" length
|
|
* @{
|
|
*/
|
|
|
|
#define SICSLOWPAN_IPV6_HDR_LEN 1 /*one byte*/
|
|
#define SICSLOWPAN_HC1_HDR_LEN 3
|
|
#define SICSLOWPAN_HC1_HC_UDP_HDR_LEN 7
|
|
#define SICSLOWPAN_FRAG1_HDR_LEN 4
|
|
#define SICSLOWPAN_FRAGN_HDR_LEN 5
|
|
/** @} */
|
|
|
|
/**
|
|
* \brief The header for fragments
|
|
* \note We do not define different structures for FRAG1
|
|
* and FRAGN headers, which are different. For FRAG1, the
|
|
* offset field is just not used
|
|
*/
|
|
/* struct sicslowpan_frag_hdr { */
|
|
/* uint16_t dispatch_size; */
|
|
/* uint16_t tag; */
|
|
/* uint8_t offset; */
|
|
/* }; */
|
|
|
|
/**
|
|
* \brief The HC1 header when HC_UDP is not used
|
|
*
|
|
* When all fields are compressed and HC_UDP is not used,
|
|
* we use this structure. If HC_UDP is used, the ttl is
|
|
* in another spot, and we use the sicslowpan_hc1_hc_udp
|
|
* structure
|
|
*/
|
|
/* struct sicslowpan_hc1_hdr { */
|
|
/* uint8_t dispatch; */
|
|
/* uint8_t encoding; */
|
|
/* uint8_t ttl; */
|
|
/* }; */
|
|
|
|
/**
|
|
* \brief HC1 followed by HC_UDP
|
|
*/
|
|
/* struct sicslowpan_hc1_hc_udp_hdr { */
|
|
/* uint8_t dispatch; */
|
|
/* uint8_t hc1_encoding; */
|
|
/* uint8_t hc_udp_encoding; */
|
|
/* uint8_t ttl; */
|
|
/* uint8_t ports; */
|
|
/* uint16_t udpchksum; */
|
|
/* }; */
|
|
|
|
/**
|
|
* \brief An address context for IPHC address compression
|
|
* each context can have upto 8 bytes
|
|
*/
|
|
struct sicslowpan_addr_context {
|
|
uint8_t used; /* possibly use as prefix-length */
|
|
uint8_t number;
|
|
uint8_t prefix[8];
|
|
};
|
|
|
|
/**
|
|
* \name Address compressibility test functions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief check whether we can compress the IID in
|
|
* address 'a' to 16 bits.
|
|
* This is used for unicast addresses only, and is true
|
|
* if the address is on the format \<PREFIX\>::0000:00ff:fe00:XXXX
|
|
* NOTE: we currently assume 64-bits prefixes
|
|
*/
|
|
#define sicslowpan_is_iid_16_bit_compressable(a) \
|
|
((((a)->u16[4]) == 0) && \
|
|
(((a)->u8[10]) == 0)&& \
|
|
(((a)->u8[11]) == 0xff)&& \
|
|
(((a)->u8[12]) == 0xfe)&& \
|
|
(((a)->u8[13]) == 0))
|
|
|
|
/**
|
|
* \brief check whether the 9-bit group-id of the
|
|
* compressed multicast address is known. It is true
|
|
* if the 9-bit group is the all nodes or all routers
|
|
* group.
|
|
* \param a is typed uint8_t *
|
|
*/
|
|
#define sicslowpan_is_mcast_addr_decompressable(a) \
|
|
(((*a & 0x01) == 0) && \
|
|
((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))
|
|
|
|
/**
|
|
* \brief check whether the 112-bit group-id of the
|
|
* multicast address is mappable to a 9-bit group-id
|
|
* It is true if the group is the all nodes or all
|
|
* routers group.
|
|
*/
|
|
#define sicslowpan_is_mcast_addr_compressable(a) \
|
|
((((a)->u16[1]) == 0) && \
|
|
(((a)->u16[2]) == 0) && \
|
|
(((a)->u16[3]) == 0) && \
|
|
(((a)->u16[4]) == 0) && \
|
|
(((a)->u16[5]) == 0) && \
|
|
(((a)->u16[6]) == 0) && \
|
|
(((a)->u8[14]) == 0) && \
|
|
((((a)->u8[15]) == 1) || (((a)->u8[15]) == 2)))
|
|
|
|
/* FFXX::00XX:XXXX:XXXX */
|
|
#define sicslowpan_is_mcast_addr_compressable48(a) \
|
|
((((a)->u16[1]) == 0) && \
|
|
(((a)->u16[2]) == 0) && \
|
|
(((a)->u16[3]) == 0) && \
|
|
(((a)->u16[4]) == 0) && \
|
|
(((a)->u8[10]) == 0))
|
|
|
|
/* FFXX::00XX:XXXX */
|
|
#define sicslowpan_is_mcast_addr_compressable32(a) \
|
|
((((a)->u16[1]) == 0) && \
|
|
(((a)->u16[2]) == 0) && \
|
|
(((a)->u16[3]) == 0) && \
|
|
(((a)->u16[4]) == 0) && \
|
|
(((a)->u16[5]) == 0) && \
|
|
(((a)->u8[12]) == 0))
|
|
|
|
/* FF02::00XX */
|
|
#define sicslowpan_is_mcast_addr_compressable8(a) \
|
|
((((a)->u8[1]) == 2) && \
|
|
(((a)->u16[1]) == 0) && \
|
|
(((a)->u16[2]) == 0) && \
|
|
(((a)->u16[3]) == 0) && \
|
|
(((a)->u16[4]) == 0) && \
|
|
(((a)->u16[5]) == 0) && \
|
|
(((a)->u16[6]) == 0) && \
|
|
(((a)->u8[14]) == 0))
|
|
|
|
/** @} */
|
|
|
|
/**
|
|
* The structure of a next header compressor.
|
|
*
|
|
* TODO: needs more parameters when compressing extension headers, etc.
|
|
*/
|
|
struct sicslowpan_nh_compressor {
|
|
int (* is_compressable)(uint8_t next_header);
|
|
|
|
/** compress next header (TCP/UDP, etc) - ptr points to next header to
|
|
compress */
|
|
int (* compress)(uint8_t *compressed, uint8_t *uncompressed_len);
|
|
|
|
/** uncompress next header (TCP/UDP, etc) - ptr points to next header to
|
|
uncompress */
|
|
int (* uncompress)(uint8_t *compressed, uint8_t *lowpanbuf, uint8_t *uncompressed_len);
|
|
|
|
};
|
|
|
|
int sicslowpan_get_last_rssi(void);
|
|
|
|
extern const struct network_driver sicslowpan_driver;
|
|
|
|
#endif /* SICSLOWPAN_H_ */
|
|
/** @} */
|