Update TODO list; Add RFC6775 header file.
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Gregory Nutt
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TODO
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TODO
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NuttX TODO List (Last updated June 17, 2017)
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NuttX TODO List (Last updated June 18, 2017)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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This file summarizes known NuttX bugs, limitations, inconsistencies with
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@ -1237,8 +1237,39 @@ o Network (net/, drivers/net)
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Ethernet MAC. For 6loWPAN, a new more conservative ICMPv6
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definitions is provided by RFC 6775. This RFC needs to be
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supported in order to support ping6 on a 6loWPAN network.
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If RFC 6775 were implemented, then arbitrary IPv6 addresses,
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including addresses from DHCPv6 could be used.
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can
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UPDATE: With ICMPv6 neighbor discovery, any IPv6 address may
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be associated with any short or extended address. In fact,
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that is the whole purpose of the neighbor discover logic: It
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plays the same role as ARP in IPv4; it ultimately just manages
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a neighbor table that, like the arp table, provides the
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mapping between IP addresses and node addresses.
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The NuttX, Contiki-based 6loWPAN implementation circumvented
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the need for the neighbor discovery logic by using only MAC-
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based addressing, i.e., the lower two or eight bytes of the
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IP address are the node address.
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Most of the 6loWPAN compression algorithms exploit this to
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compress the IPv6 address to nothing but a bit indicating
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that the IP address derives from the node address. So I
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think ICMPv6 is useless in the current implementation.
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If we want to use ICMPv6, we could dispense with the all MAC
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based addressing. But if we want to retain the more compact
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MAC-based addressing, then we don't need ICMPv6.
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So, the full neighbor discovery logic is not currently useful,
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but it would still be nice to have enough in place to support
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ping6.
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Status: Open
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Priority: Low for now.
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Priority: Low for now. I don't plan on implementing this. It would
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only be relevant if we were to decide to abandon the use of
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MAC-based addressing in the 6loWPAN implementation.
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Title: ETHERNET LOCAL BROADCAST DOES NOT WORK
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141
include/nuttx/net/rfc6775.h
Normal file
141
include/nuttx/net/rfc6775.h
Normal file
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/****************************************************************************
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* include/nuttx/net/enc28j60.h
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*
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* Copyright (C) 2010, 2012, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_NET_RFC6775_H
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#define __INCLUDE_NUTTX_NET_RFC6775_H
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* 4.2 Bit definitions for 6CO resccid field */
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#define RESCCID_CID_SHIFT (0) /* Bits 0-3: Context identifier */
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#define RESCCID_CID_MASK (7 << RESCCID_CID_SHIFT)
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#define RESCCID_C (1 << 4) /* Bit 4: Compression Flag */
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/* Bits 5-7: Reserved */
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/* 9 Protocol Constants */
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/* 6LBR Constants: */
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#define MIN_CONTEXT_CHANGE_DELAY 300 /* Seconds */
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/* 6LR Constants: */
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#define MAX_RTR_ADVERTISEMENTS 3 /* Transmissions */
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#define MIN_DELAY_BETWEEN_RAS 10 /* Seconds */
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#define MAX_RA_DELAY_TIME 2 /* Seconds */
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#define TENTATIVE_NCE_LIFETIME 20 /* Seconds */
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/* Router Constants: */
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#define MULTIHOP_HOPLIMI 64
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/* Host Constants: */
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#define RTR_SOLICITATION_INTERVAL 10 /* Seconds */
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#define MAX_RTR_SOLICITATIONS 3 /* Transmissions */
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#define MAX_RTR_SOLICITATION_INTERVAL 60 /* Seconds */
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* Table 1. alues for status field */
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enum icmpv6_status_e
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{
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ICMPV6_SUCCESS = 0, /* Success */
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ICMPV6_DUPLICATE = 1, /* Duplicate address */
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ICMPV6_FULL = 2, /* Neighbor cache full */
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ICMPV6_ALLOCATED = 3 /* 3-255: Allocated using standard action (RFC5226 */
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};
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/* 4.1 Source Link-Layer Address Option (SLLAO) */
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struct icmpv6_sllao_s
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{
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uint8_t type; /* Byte 0: Type = 33 */
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uint8_t length; /* Byte 1: Length in units of 8 bytes = 2 */
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uint8_t status; /* Byte 2: Status of NS message. See enum icmpv6_status_e */
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uint8_t reserved[3]; /* Bytes 3-5: Reserved */
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uint8_t lifetime[2]; /* Bytes 6-7: Registration lifetime */
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uint8_t eui64[8]; /* Bytes 8-15: EUI-64 identifier assigned to interface */
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};
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/* 4.2 6loWPAN Context Option (6CO) */
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struct icmpv6_6co_s
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{
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uint8_t type; /* Byte 0: Type = 34 */
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uint8_t length; /* Byte 1: Length in units of 8 bytes = 2 or 3 */
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uint8_t ctxlen; /* Byte 2: Context length = 0-128 bits */
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uint8_t resccid; /* Byte 3: See RESCCID_* bit definitions */
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uint8_t reserved[2]; /* Bytes 4-6: Reserved */
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uint8_t lifetime[2]; /* Bytes 6-7: Valid lifetime */
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uint8_t prefix[1]; /* Bytes 8-15 or 8-23: Context Prefix */
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};
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#define ICMPV6_6CO_LEN(b) ((b > 64) ? 16 : 8)
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#define SIZEOF_ICMPV6_6CO_S(b) (sizeof(struct icmpv6_6co_s) + CMPV6_6CO_LEN(b) - 1)
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/* 4.3 Authoritative Border Router Option (ABRO) */
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struct icmpv6_abro_s
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{
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uint8_t type; /* Byte 0: Type = 35 */
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uint8_t length; /* Byte 1: Length in units of 8 bytes = 3 */
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uint8_t verlo[2]; /* Bytes 2-3: Version low */
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uint8_t verhi[2]; /* Bytes 4-5: Version high */
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uint8_t lifetime[2]; /* Bytes 6-7: Valid lifetime */
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uint8_t ipv6[16]; /* Bytes 8-23: IPv6 address of the 6LBR orign of version */
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};
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/* 4.4 Duplicate Address Messages (DAD for both DAR and DAC) */
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struct icmpv6_dad_s
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{
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uint8_t type; /* Byte 0: Type = 157 (DAR) or 158 (DAC) */
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uint8_t code; /* Byte 1: Code */
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uint8_t chksum[2]; /* Bytes 2-3: Checksum */
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uint8_t status; /* Byte 4: Status of DAR. See enum icmpv6_status_e */
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uint8_t reserved; /* Byte 5: Reserved */
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uint8_t lifetime[2]; /* Bytes 6-7: Registration lifetime */
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uint8_t eui64[8]; /* Bytes 8-15: EUI-64 identifier registered address */
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uint8_t ipv6[16]; /* Bytes 16-31: Registered address */
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};
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#endif /* __INCLUDE_NUTTX_NET_RFC6775_H */
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