259 lines
7.7 KiB
C
259 lines
7.7 KiB
C
/**
|
|
* \addtogroup sicslowpan
|
|
* @{
|
|
*/
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* $Id: sicslowpan.h,v 1.3 2009/03/17 20:28:44 nvt-se Exp $
|
|
*/
|
|
/**
|
|
* \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>
|
|
*/
|
|
|
|
#ifndef __SICSLOWPAN_H__
|
|
#define __SICSLOWPAN_H__
|
|
#include "net/uip.h"
|
|
|
|
/**
|
|
* \name General sicslowpan defines
|
|
* @{
|
|
*/
|
|
/* Min and Max compressible UDP ports */
|
|
#define SICSLOWPAN_UDP_PORT_MIN 0xF0B0
|
|
#define SICSLOWPAN_UDP_PORT_MAX 0xF0BF /* F0B0 + 15 */
|
|
/** @} */
|
|
|
|
|
|
/**
|
|
* \name 6lowpan dispatches
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
|
|
#define SICSLOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
|
|
#define SICSLOWPAN_DISPATCH_IPHC 0x03 /* 00000011 = 3 */
|
|
#define SICSLOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
|
|
#define SICSLOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
|
|
/** @} */
|
|
|
|
/** \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_TC_C 0x80
|
|
#define SICSLOWPAN_IPHC_VF_C 0x40
|
|
#define SICSLOWPAN_IPHC_NH_C 0x20
|
|
#define SICSLOWPAN_IPHC_TTL_1 0x08
|
|
#define SICSLOWPAN_IPHC_TTL_64 0x10
|
|
#define SICSLOWPAN_IPHC_TTL_255 0x18
|
|
#define SICSLOWPAN_IPHC_TTL_I 0x00
|
|
|
|
/* Values of fields within the IPHC encoding second byte */
|
|
#define SICSLOWPAN_IPHC_SAM_I 0x00
|
|
#define SICSLOWPAN_IPHC_SAM_64 0x40
|
|
#define SICSLOWPAN_IPHC_SAM_16 0x80
|
|
#define SICSLOWPAN_IPHC_SAM_0 0xC0
|
|
#define SICSLOWPAN_IPHC_DAM_I 0x00
|
|
#define SICSLOWPAN_IPHC_DAM_64 0x04
|
|
#define SICSLOWPAN_IPHC_DAM_16 0x08
|
|
#define SICSLOWPAN_IPHC_DAM_0 0x0C
|
|
|
|
/* Link local context number */
|
|
#define SICSLOWPAN_IPHC_ADDR_CONTEXT_LL 0
|
|
/* 16-bit multicast addresses compression */
|
|
#define SICSLOWPAN_IPHC_MCAST_RANGE 0xA0
|
|
/** @} */
|
|
|
|
|
|
/**
|
|
* \name LOWPAN_UDP encoding (works together with IPHC)
|
|
* @{
|
|
*/
|
|
#define SICSLOWPAN_NHC_UDP_ID 0xF8
|
|
#define SICSLOWPAN_NHC_UDP_C 0xFB
|
|
#define SICSLOWPAN_NHC_UDP_I 0xF8
|
|
/** @} */
|
|
|
|
|
|
/**
|
|
* \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 {
|
|
u16_t dispatch_size;
|
|
u16_t tag;
|
|
u8_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 {
|
|
u8_t dispatch;
|
|
u8_t encoding;
|
|
u8_t ttl;
|
|
};
|
|
|
|
/**
|
|
* \brief HC1 followed by HC_UDP
|
|
*/
|
|
struct sicslowpan_hc1_hc_udp_hdr {
|
|
u8_t dispatch;
|
|
u8_t hc1_encoding;
|
|
u8_t hc_udp_encoding;
|
|
u8_t ttl;
|
|
u8_t ports;
|
|
u16_t udpchksum;
|
|
};
|
|
|
|
/**
|
|
* \brief IPHC dispatch and encoding
|
|
* the rest (uncompressed fields) is variable
|
|
*/
|
|
struct sicslowpan_iphc_hdr {
|
|
u8_t dispatch;
|
|
u8_t encoding[2];
|
|
};
|
|
|
|
struct sicslowpan_nhc_udp_comp_hdr {
|
|
u8_t nhcid;
|
|
u8_t ports;
|
|
u16_t udpchksum;
|
|
};
|
|
|
|
/**
|
|
* \brief An address context for IPHC address compression
|
|
*/
|
|
struct sicslowpan_addr_context {
|
|
u8_t used;
|
|
u8_t number;
|
|
u8_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 first 49 bits of IID are 0
|
|
*/
|
|
#define sicslowpan_is_iid_16_bit_compressable(a) \
|
|
((((a)->u16[4]) == 0) && \
|
|
(((a)->u16[5]) == 0) && \
|
|
(((a)->u16[6]) == 0) && \
|
|
((((a)->u8[14]) & 0x80) == 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 u8_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)))
|
|
|
|
/** @} */
|
|
|
|
/**
|
|
* \brief 6lowpan init function
|
|
* \param m is the MAC layer "driver"
|
|
*/
|
|
void sicslowpan_init(const struct mac_driver *m);
|
|
|
|
#endif /* __SICSLOWPAN_H__ */
|
|
/** @} */
|