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6loWPAN: Rename net/6lowpan to net/sixlowpan; Add Contike sixlowpan.h to include/nuttx/net

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This commit is contained in:
Gregory Nutt 2017-03-27 14:53:52 -06:00
parent 6c4dac459a
commit a522fc4f34
6 changed files with 320 additions and 10 deletions
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310
include/nuttx/net/sixlowpan.h Normal file
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@ -0,0 +1,310 @@
/****************************************************************************
* include/nuttx/net/sixlowpan.h
* Header file for the 6lowpan implementation (RFC4944 and draft-hui-6lowpan-hc-01)
*
* Copyright (C) 2017, Gregory Nutt, all rights reserved
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Derives from Contiki:
*
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
* Authors: Adam Dunkels <adam@sics.se>
* Nicolas Tsiftes <nvt@sics.se>
* Niclas Finne <nfi@sics.se>
* Mathilde Durvy <mdurvy@cisco.com>
* Julien Abeille <jabeille@cisco.com>
*
* 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 __INCLUDE_NUTTX_NET_SIXLOWOAN_H
#define __INCLUDE_NUTTX_NET_SIXLOWOAN_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Min and Max compressible UDP ports - HC06 */
#define SIXLOWPAN_UDP_4_BIT_PORT_MIN 0xf0b0
#define SIXLOWPAN_UDP_4_BIT_PORT_MAX 0xf0bf /* F0B0 + 15 */
#define SIXLOWPAN_UDP_8_BIT_PORT_MIN 0xF000
#define SIXLOWPAN_UDP_8_BIT_PORT_MAX 0xf0ff /* F000 + 255 */
/* 6lowpan compressions */
#define SIXLOWPAN_COMPRESSION_IPV6 0
#define SIXLOWPAN_COMPRESSION_HC1 1
#define SIXLOWPAN_COMPRESSION_HC06 2
/* 6lowpan dispatches */
#define SIXLOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
#define SIXLOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
#define SIXLOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */
#define SIXLOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
#define SIXLOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
/* HC1 encoding */
#define SIXLOWPAN_HC1_NH_UDP 0x02
#define SIXLOWPAN_HC1_NH_TCP 0x06
#define SIXLOWPAN_HC1_NH_ICMP6 0x04
/* HC_UDP encoding (works together with HC1) */
#define SIXLOWPAN_HC_UDP_ALL_C 0xe0
/* IPHC encoding
*
* Values of fields within the IPHC encoding first byte (C stands for
* compressed and I for inline)
*/
#define SIXLOWPAN_IPHC_FL_C 0x10
#define SIXLOWPAN_IPHC_TC_C 0x08
#define SIXLOWPAN_IPHC_NH_C 0x04
#define SIXLOWPAN_IPHC_TTL_1 0x01
#define SIXLOWPAN_IPHC_TTL_64 0x02
#define SIXLOWPAN_IPHC_TTL_255 0x03
#define SIXLOWPAN_IPHC_TTL_I 0x00
/* Values of fields within the IPHC encoding second byte */
#define SIXLOWPAN_IPHC_CID 0x80
#define SIXLOWPAN_IPHC_SAC 0x40
#define SIXLOWPAN_IPHC_SAM_00 0x00
#define SIXLOWPAN_IPHC_SAM_01 0x10
#define SIXLOWPAN_IPHC_SAM_10 0x20
#define SIXLOWPAN_IPHC_SAM_11 0x30
#define SIXLOWPAN_IPHC_SAM_BIT 4
#define SIXLOWPAN_IPHC_M 0x08
#define SIXLOWPAN_IPHC_DAC 0x04
#define SIXLOWPAN_IPHC_DAM_00 0x00
#define SIXLOWPAN_IPHC_DAM_01 0x01
#define SIXLOWPAN_IPHC_DAM_10 0x02
#define SIXLOWPAN_IPHC_DAM_11 0x03
#define SIXLOWPAN_IPHC_DAM_BIT 0
/* Link local context number */
#define SIXLOWPAN_IPHC_ADDR_CONTEXT_LL 0
/* 16-bit multicast addresses compression */
#define SIXLOWPAN_IPHC_MCAST_RANGE 0xa0
/* NHC_EXT_HDR */
#define SIXLOWPAN_NHC_MASK 0xf0
#define SIXLOWPAN_NHC_EXT_HDR 0xe0
/* LOWPAN_UDP encoding (works together with IPHC) */
#define SIXLOWPAN_NHC_UDP_MASK 0xf8
#define SIXLOWPAN_NHC_UDP_ID 0xf0
#define SIXLOWPAN_NHC_UDP_CHECKSUMC 0x04
#define SIXLOWPAN_NHC_UDP_CHECKSUMI 0x00
/* Values for port compression, _with checksum_ ie bit 5 set to 0 */
#define SIXLOWPAN_NHC_UDP_CS_P_00 0xf0 /* All inline */
#define SIXLOWPAN_NHC_UDP_CS_P_01 0xf1 /* Source 16bit inline, dest = 0xf0 + 8 bit inline */
#define SIXLOWPAN_NHC_UDP_CS_P_10 0xf2 /* Source = 0xf0 + 8bit inline, dest = 16 bit inline */
#define SIXLOWPAN_NHC_UDP_CS_P_11 0xf3 /* Source & dest = 0xf0b + 4bit inline */
/* The 6lowpan "headers" length */
#define SIXLOWPAN_IPV6_HDR_LEN 1 /* One byte */
#define SIXLOWPAN_HC1_HDR_LEN 3
#define SIXLOWPAN_HC1_HC_UDP_HDR_LEN 7
#define SIXLOWPAN_FRAG1_HDR_LEN 4
#define SIXLOWPAN_FRAGN_HDR_LEN 5
/* Address compressibility test macros */
/* 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 SIXLOWPAN_IS_IID_16BIT_COMPRESSABLE(a) \
((((a)->u16[4]) == 0) && \
// (((a)->u8[10]) == 0)&& \
(((a)->u8[11]) == 0xff)&& \
(((a)->u8[12]) == 0xfe)&& \
(((a)->u8[13]) == 0))
/* 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. Parameter 'a' is typed uint8_t *
*/
#define SIXLOWPAN_IS_MCASTADDR_DECOMPRESSABLE(a) \
(((*a & 0x01) == 0) && \
((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))
/* 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 SIXLOWPAN_IS_MCASTADDR_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 SIXLOWPAN_IS_MCASTADDR_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 SIXLOWPAN_IS_MCASTADDR_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 SIXLOWPAN_IS_MCASTADDR_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))
/****************************************************************************
* Public Types
****************************************************************************/
/* 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 sixlowpan_frag_hdr
{
uint16_t dispatch_size;
uint16_t tag;
uint8_t offset;
};
/* 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
* sixlowpan_hc1_hc_udp structure
*/
struct sixlowpan_hc1_hdr
{
uint8_t dispatch;
uint8_t encoding;
uint8_t ttl;
};
/* HC1 followed by HC_UDP */
struct sixlowpan_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;
};
/* An address context for IPHC address compression each context can have up
* to 8 bytes
*/
struct sixlowpan_addr_context
{
uint8_t used; /* Possibly use as prefix-length */
uint8_t number;
uint8_t prefix[8];
};
/* The structure of a next header compressor.
*
* TODO: needs more parameters when compressing extension headers, etc.
*/
struct sixlowpan_nhcompressor_s
{
CODE int (*is_compressable)(uint8_t next_header);
/* Compress next header (TCP/UDP, etc) - ptr points to next header to
* compress.
*/
CODE int (*compress)(FAR uint8_t *compressed, FAR uint8_t *uncompressed_len);
/* Uncompress next header (TCP/UDP, etc) - ptr points to next header to
* uncompress.
*/
CODE int (*uncompress)(FAR uint8_t *compressed, FAR uint8_t *lowpanbuf,
FAR uint8_t *uncompressed_len);
};
#endif /* __INCLUDE_NUTTX_NET_SIXLOWOAN_H */

2
net/Kconfig
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@ -255,7 +255,7 @@ menuconfig NET_IPv6
Build in support for IPv6.
source "net/neighbor/Kconfig"
source "net/6lowpan/Kconfig"
source "net/sixlowpan/Kconfig"
endmenu # Internet Protocol Selection

2
net/Makefile
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@ -67,7 +67,7 @@ include pkt/Make.defs
include local/Make.defs
include tcp/Make.defs
include udp/Make.defs
include 6lowpan/Make.defs
include sixlowpan/Make.defs
include devif/Make.defs
include loopback/Make.defs
include route/Make.defs

0
net/6lowpan/Kconfig → net/sixlowpan/Kconfig
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8
net/6lowpan/Make.defs → net/sixlowpan/Make.defs
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@ -1,5 +1,5 @@
############################################################################
# net/6lowpan/Make.defs
# net/sixlowpan/Make.defs
#
# Copyright (C) 2016 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
@ -41,9 +41,9 @@ ifeq ($(CONFIG_NET_6LOWPAN),y)
# NET_CSRCS +=
# Include the 6lowpan directory in the build
# Include the sixlowpan directory in the build
DEPPATH += --dep-path 6lowpan
VPATH += :6lowpan
DEPPATH += --dep-path sixlowpan
VPATH += :sixlowpan
endif # CONFIG_NET_6LOWPAN

8
net/6lowpan/6lowpan.h → net/sixlowpan/sixlowpan.h
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@ -1,5 +1,5 @@
/****************************************************************************
* net/6lowpan/6lowpan.h
* net/sixlowpan/sixlowpan.h
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
@ -33,8 +33,8 @@
*
****************************************************************************/
#ifndef __NET_6LOWPAN_6LOWPAN_H
#define __NET_6LOWPAN_6LOWPAN_H
#ifndef _NET_SIXLOWPAN_SIXLOWPAN_H
#define _NET_SIXLOWPAN_SIXLOWPAN_H
/****************************************************************************
* Included Files
@ -53,4 +53,4 @@
****************************************************************************/
#endif /* CONFIG_NET_6LOWPAN */
#endif /* __NET_6LOWPAN_6LOWPAN_H */
#endif /* _NET_SIXLOWPAN_SIXLOWPAN_H */