Main uIPv6 files addition - more
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julienabeille
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1423
core/net/sicslowpan.c
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1423
core/net/sicslowpan.c
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File diff suppressed because it is too large
Load Diff
259
core/net/sicslowpan.h
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259
core/net/sicslowpan.h
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/**
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* \addtogroup sicslowpan
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* @{
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*/
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/*
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* Copyright (c) 2008, Swedish Institute of Computer Science.
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be 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 INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: sicslowpan.h,v 1.1 2008/10/14 09:42:33 julienabeille Exp $
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*/
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/**
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* \file
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* Header file for the 6lowpan implementation
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* (RFC4944 and draft-hui-6lowpan-hc-01)
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* \author Adam Dunkels <adam@sics.se>
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* \author Nicolas Tsiftes <nvt@sics.se>
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* \author Niclas Finne <nfi@sics.se>
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* \author Mathilde Durvy <mdurvy@cisco.com>
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* \author Julien Abeille <jabeille@cisco.com>
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*/
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#ifndef __SICSLOWPAN_H__
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#define __SICSLOWPAN_H__
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#include "net/uip.h"
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#include "sicslowmac.h"
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/**
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* \name General sicslowpan defines
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* @{
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*/
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/* Min and Max compressable UDP ports */
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#define SICSLOWPAN_UDP_PORT_MIN 0xF0B0
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#define SICSLOWPAN_UDP_PORT_MAX 0xF0BF /* F0B0 + 15 */
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/** @} */
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/**
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* \name 6lowpan dispatchs
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* @{
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*/
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#define SICSLOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
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#define SICSLOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
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#define SICSLOWPAN_DISPATCH_IPHC 0x03 /* 00000011 = 3 */
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#define SICSLOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
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#define SICSLOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
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/** @} */
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/** \name HC1 encoding
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* @{
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*/
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#define SICSLOWPAN_HC1_NH_UDP 0x02
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#define SICSLOWPAN_HC1_NH_TCP 0x06
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#define SICSLOWPAN_HC1_NH_ICMP6 0x04
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/** @} */
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/** \name HC_UDP encoding (works together with HC1)
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* @{
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*/
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#define SICSLOWPAN_HC_UDP_ALL_C 0xE0
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/** @} */
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/**
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* \name IPHC encoding
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* @{
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*/
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/*
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* Values of fields within the IPHC encoding first byte
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* (C stands for compressed and I for inline)
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*/
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#define SICSLOWPAN_IPHC_TC_C 0x80
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#define SICSLOWPAN_IPHC_VF_C 0x40
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#define SICSLOWPAN_IPHC_NH_C 0x20
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#define SICSLOWPAN_IPHC_TTL_1 0x08
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#define SICSLOWPAN_IPHC_TTL_64 0x10
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#define SICSLOWPAN_IPHC_TTL_255 0x18
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#define SICSLOWPAN_IPHC_TTL_I 0x00
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/* Values of fields within the IPHC encoding second byte */
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#define SICSLOWPAN_IPHC_SAM_I 0x00
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#define SICSLOWPAN_IPHC_SAM_64 0x40
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#define SICSLOWPAN_IPHC_SAM_16 0x80
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#define SICSLOWPAN_IPHC_SAM_0 0xC0
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#define SICSLOWPAN_IPHC_DAM_I 0x00
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#define SICSLOWPAN_IPHC_DAM_64 0x04
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#define SICSLOWPAN_IPHC_DAM_16 0x08
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#define SICSLOWPAN_IPHC_DAM_0 0x0C
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/* Link local context number */
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#define SICSLOWPAN_IPHC_ADDR_CONTEXT_LL 0
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/* 16-bit multicast addresses compression */
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#define SICSLOWPAN_IPHC_MCAST_RANGE 0xA0
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/** @} */
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/**
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* \name LOWPAN_UDP encoding (works together with IPHC)
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* @{
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*/
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#define SICSLOWPAN_NHC_UDP_ID 0xF8
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#define SICSLOWPAN_NHC_UDP_C 0xFB
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#define SICSLOWPAN_NHC_UDP_I 0xF8
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/** @} */
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/**
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* \name The 6lowpan "headers" length
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* @{
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*/
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#define SICSLOWPAN_IPV6_HDR_LEN 1 /*one byte*/
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#define SICSLOWPAN_HC1_HDR_LEN 3
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#define SICSLOWPAN_HC1_HC_UDP_HDR_LEN 7
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#define SICSLOWPAN_FRAG1_HDR_LEN 4
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#define SICSLOWPAN_FRAGN_HDR_LEN 5
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/** @} */
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/**
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* \brief The header for fragments
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* \note We do not define different structuresfor FRAG1
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* and FRAGN headers, which are different. For FRAG1, the
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* offset field is just not used
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*/
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struct sicslowpan_frag_hdr {
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u16_t dispatch_size;
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u16_t tag;
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u8_t offset;
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};
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/**
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* \brief The HC1 header when HC_UDP is not used
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*
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* When all fields are compressed and HC_UDP is not used,
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* we use this structure. If HC_UDP is used, the ttl is
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* in another spot, and we use the sicslowpan_hc1_hc_udp
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* structure
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*/
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struct sicslowpan_hc1_hdr {
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u8_t dispatch;
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u8_t encoding;
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u8_t ttl;
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};
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/**
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* \brief HC1 followed by HC_UDP
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*/
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struct sicslowpan_hc1_hc_udp_hdr {
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u8_t dispatch;
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u8_t hc1_encoding;
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u8_t hc_udp_encoding;
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u8_t ttl;
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u8_t ports;
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u16_t udpchksum;
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};
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/**
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* \brief IPHC dispatch and encoding
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* the rest (uncompressed fields) is variable
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*/
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struct sicslowpan_iphc_hdr {
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u8_t dispatch;
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u8_t encoding[2];
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};
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struct sicslowpan_nhc_udp_comp_hdr {
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u8_t nhcid;
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u8_t ports;
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u16_t udpchksum;
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};
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/**
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* \brief An address context for IPHC address compression
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*/
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struct sicslowpan_addr_context {
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u8_t used;
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u8_t number;
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u8_t prefix[8];
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};
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/**
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* \name Address compressibility test functions
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* @{
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*/
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/**
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* \brief check whether we can compress the IID in
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* address 'a' to 16 bits.
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* This is used for unicast addresses only, and is true
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* if first 49 bits of IID are 0
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*/
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#define sicslowpan_is_iid_16_bit_compressable(a) \
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((((a)->u16[4]) == 0) && \
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(((a)->u16[5]) == 0) && \
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(((a)->u16[6]) == 0) && \
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((((a)->u8[14]) & 0x80) == 0))
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/**
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* \brief check whether the 9-bit group-id of the
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* compressed multicast address is known. It is true
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* if the 9-bit group is the all nodes or all routers
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* group.
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* \param a is typed u8_t *
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*/
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#define sicslowpan_is_mcast_addr_decompressable(a) \
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(((*a & 0x01) == 0) && \
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((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))
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/**
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* \brief check whether the 112-bit group-id of the
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* multicast address is mapable to a 9-bit group-id
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* It is true if the group is the all nodes or all
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* routers group.
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*/
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#define sicslowpan_is_mcast_addr_compressable(a) \
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((((a)->u16[1]) == 0) && \
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(((a)->u16[2]) == 0) && \
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(((a)->u16[3]) == 0) && \
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(((a)->u16[4]) == 0) && \
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(((a)->u16[5]) == 0) && \
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(((a)->u16[6]) == 0) && \
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(((a)->u8[14]) == 0) && \
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((((a)->u8[15]) == 1) || (((a)->u8[15]) == 2)))
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/** @} */
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/**
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* \brief 6lowpan init function
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* \param m is the MAC layer "driver"
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*/
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void sicslowpan_init(const struct mac_driver *m);
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#endif /* __SICSLOWPAN_H__ */
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/** @} */
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185
core/net/uip-icmp6.c
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185
core/net/uip-icmp6.c
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@ -0,0 +1,185 @@
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/**
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* \addtogroup uip6
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* @{
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*/
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/**
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* \file
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* ICMPv6 echo request and error messages (RFC 4443)
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* \author Julien Abeille <jabeille@cisco.com>
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* \author Mathilde Durvy <mdurvy@cisco.com>
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*/
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/*
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* Copyright (c) 2001-2003, Adam Dunkels.
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* All rights reserved.
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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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* 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
|
||||
* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
|
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the uIP TCP/IP stack.
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*
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*/
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#include <string.h>
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#include "net/uip-netif.h"
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#include "net/uip-icmp6.h"
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
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#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
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#else
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#define PRINTF(...)
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#define PRINT6ADDR(addr)
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#endif
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#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
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#define UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
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#define UIP_ICMP6_ERROR_BUF ((struct uip_icmp6_error *)&uip_buf[uip_l2_l3_icmp_hdr_len])
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/** \brief temporary IP address */
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static uip_ipaddr_t tmp_ipaddr;
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void
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uip_icmp6_echo_request_input(void)
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{
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/*
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* we send an echo reply. It is trivial if there was no extension
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* headers in the request otherwise we need to remove the extension
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* headers and change a few fields
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*/
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PRINTF("Received Echo Request from");
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PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
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PRINTF("to");
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PRINT6ADDR(&UIP_IP_BUF->destipaddr);
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PRINTF("\n");
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/* IP header */
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UIP_IP_BUF->ttl = uip_netif_physical_if.cur_hop_limit;
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if(uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)){
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uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
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uip_netif_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
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} else {
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uip_ipaddr_copy(&tmp_ipaddr, &UIP_IP_BUF->srcipaddr);
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uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
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uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &tmp_ipaddr);
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}
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if(uip_ext_len > 0) {
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/* If there were extension headers*/
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UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
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uip_len -= uip_ext_len;
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UIP_IP_BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
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UIP_IP_BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
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/* move the echo request payload (starting after the icmp header)
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* to the new location in the reply.
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* The shift is equal to the length of the extension headers present
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* Note: UIP_ICMP_BUF still points to the echo request at this stage
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*/
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memmove((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN - uip_ext_len,
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(void *)UIP_ICMP_BUF + UIP_ICMPH_LEN,
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(uip_len - UIP_IPH_LEN - UIP_ICMPH_LEN));
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}
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/* Below is important for the correctness of UIP_ICMP_BUF and the
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* checksum
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*/
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uip_ext_len = 0;
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/* Note: now UIP_ICMP_BUF points to the beginning of the echo reply */
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UIP_ICMP_BUF->type = ICMP6_ECHO_REPLY;
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UIP_ICMP_BUF->icode = 0;
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UIP_ICMP_BUF->icmpchksum = 0;
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UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
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PRINTF("Sending Echo Reply to");
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PRINT6ADDR(&UIP_IP_BUF->destipaddr);
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PRINTF("from");
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PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
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PRINTF("\n");
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UIP_STAT(++uip_stat.icmp.sent);
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return;
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}
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void
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uip_icmp6_error_output(u8_t type, u8_t code, u32_t param) {
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uip_ext_len = 0;
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/* remember data of original packet before shifting */
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uip_ipaddr_copy(&tmp_ipaddr, &UIP_IP_BUF->destipaddr);
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uip_len += UIP_IPICMPH_LEN + UIP_ICMP6_ERROR_LEN;
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if(uip_len > UIP_LINK_MTU)
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uip_len = UIP_LINK_MTU;
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memmove((void *)UIP_ICMP6_ERROR_BUF + UIP_ICMP6_ERROR_LEN,
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(void *)UIP_IP_BUF, uip_len - UIP_IPICMPH_LEN - UIP_ICMP6_ERROR_LEN);
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UIP_IP_BUF->vtc = 0x60;
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UIP_IP_BUF->tcflow = 0;
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UIP_IP_BUF->flow = 0;
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UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
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UIP_IP_BUF->ttl = uip_netif_physical_if.cur_hop_limit;
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/* the source should not be unspecified nor multicast, the check for
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multicast is done in uip_process */
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if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)){
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uip_len = 0;
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return;
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}
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uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
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|
||||
if(uip_is_addr_mcast(&tmp_ipaddr)){
|
||||
if(type == ICMP6_PARAM_PROB && code == ICMP6_PARAMPROB_OPTION){
|
||||
uip_netif_select_src(&UIP_IP_BUF->srcipaddr, &tmp_ipaddr);
|
||||
} else {
|
||||
uip_len = 0;
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &tmp_ipaddr);
|
||||
}
|
||||
|
||||
UIP_ICMP_BUF->type = type;
|
||||
UIP_ICMP_BUF->icode = code;
|
||||
UIP_ICMP6_ERROR_BUF->param = htonl(param);
|
||||
UIP_IP_BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
|
||||
UIP_IP_BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
|
||||
UIP_ICMP_BUF->icmpchksum = 0;
|
||||
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
|
||||
|
||||
UIP_STAT(++uip_stat.icmp.sent);
|
||||
|
||||
PRINTF("Sending ICMPv6 ERROR message to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/** @} */
|
||||
127
core/net/uip-icmp6.h
Normal file
127
core/net/uip-icmp6.h
Normal file
@ -0,0 +1,127 @@
|
||||
/**
|
||||
* \addtogroup uip6
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* ICMPv6 echo request and error messages (RFC 4443)
|
||||
* \author Julien Abeille <jabeille@cisco.com>
|
||||
* \author Mathilde Durvy <mdurvy@cisco.com>
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2006, 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.
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
#ifndef __ICMP6_H__
|
||||
#define __ICMP6_H__
|
||||
|
||||
#include "net/uip.h"
|
||||
|
||||
|
||||
/** \name ICMPv6 message types */
|
||||
/** @{ */
|
||||
#define ICMP6_DST_UNREACH 1 /**< dest unreachable */
|
||||
#define ICMP6_PACKET_TOO_BIG 2 /**< packet too big */
|
||||
#define ICMP6_TIME_EXCEEDED 3 /**< time exceeded */
|
||||
#define ICMP6_PARAM_PROB 4 /**< ip6 header bad */
|
||||
#define ICMP6_ECHO_REQUEST 128 /**< Echo request */
|
||||
#define ICMP6_ECHO_REPLY 129 /**< Echo reply */
|
||||
|
||||
#define ICMP6_RS 133 /**< Router Solicitation */
|
||||
#define ICMP6_RA 134 /**< Router Advertisement */
|
||||
#define ICMP6_NS 135 /**< Neighbor Solicitation */
|
||||
#define ICMP6_NA 136 /**< Neighbor advertisement */
|
||||
#define ICMP6_REDIRECT 137 /**< Redirect */
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name ICMPv6 Destination Unreachable message codes*/
|
||||
/** @{ */
|
||||
#define ICMP6_DST_UNREACH_NOROUTE 0 /**< no route to destination */
|
||||
#define ICMP6_DST_UNREACH_ADMIN 1 /**< administratively prohibited */
|
||||
#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /**< not a neighbor(obsolete) */
|
||||
#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /**< beyond scope of source address */
|
||||
#define ICMP6_DST_UNREACH_ADDR 3 /**< address unreachable */
|
||||
#define ICMP6_DST_UNREACH_NOPORT 4 /**< port unreachable */
|
||||
/** @} */
|
||||
|
||||
/** \name ICMPv6 Time Exceeded message codes*/
|
||||
/** @{ */
|
||||
#define ICMP6_TIME_EXCEED_TRANSIT 0 /**< ttl==0 in transit */
|
||||
#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /**< ttl==0 in reass */
|
||||
/** @} */
|
||||
|
||||
/** \name ICMPv6 Parameter Problem message codes*/
|
||||
/** @{ */
|
||||
#define ICMP6_PARAMPROB_HEADER 0 /**< erroneous header field */
|
||||
#define ICMP6_PARAMPROB_NEXTHEADER 1 /**< unrecognized next header */
|
||||
#define ICMP6_PARAMPROB_OPTION 2 /**< unrecognized option */
|
||||
/** @} */
|
||||
|
||||
/** \brief Echo Request constant part length */
|
||||
#define UIP_ICMP6_ECHO_REQUEST_LEN 4
|
||||
|
||||
/** \brief ICMPv6 Error message constant part length */
|
||||
#define UIP_ICMP6_ERROR_LEN 4
|
||||
|
||||
/** \brief ICMPv6 Error message constant part */
|
||||
struct uip_icmp6_error{
|
||||
u32_t param;
|
||||
};
|
||||
|
||||
/** \name ICMPv6 RFC4443 Message processing and sending */
|
||||
/** @{ */
|
||||
/** \
|
||||
* brief Process an echo request
|
||||
*
|
||||
* Perform a few checks, then send an Echop reply. The reply is
|
||||
* built here.
|
||||
*/
|
||||
void
|
||||
uip_icmp6_echo_request_input(void);
|
||||
|
||||
/**
|
||||
* \brief Send an icmpv6 error message
|
||||
* \param type type of the Error message
|
||||
* \param code of the error message
|
||||
* \param type 32 bit parameter of the error message, semantic depends on error
|
||||
*/
|
||||
void
|
||||
uip_icmp6_error_output(u8_t type, u8_t code, u32_t param);
|
||||
|
||||
/** @} */
|
||||
|
||||
#endif /*__ICMP6_H__*/
|
||||
/** @} */
|
||||
|
||||
919
core/net/uip-nd6-io.c
Normal file
919
core/net/uip-nd6-io.c
Normal file
@ -0,0 +1,919 @@
|
||||
/**
|
||||
* \addtogroup uip6
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Neighbor discovery Input-Output (RFC 4861)
|
||||
* \author Julien Abeille <jabeille@cisco.com>
|
||||
* \author Mathilde Durvy <mdurvy@cisco.com>
|
||||
*/
|
||||
/*
|
||||
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
||||
* 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 project 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 PROJECT 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 PROJECT 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.
|
||||
*/
|
||||
/*
|
||||
* Copyright (c) 2006, 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <string.h>
|
||||
#include "net/uip-icmp6.h"
|
||||
#include "net/uip-nd6.h"
|
||||
#include "net/uip-netif.h"
|
||||
|
||||
|
||||
|
||||
/*------------------------------------------------------------------*/
|
||||
#define DEBUG 0
|
||||
#if DEBUG
|
||||
#include <stdio.h>
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
|
||||
#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
|
||||
#else
|
||||
#define PRINTF(...)
|
||||
#define PRINT6ADDR(addr)
|
||||
#define PRINTLLADDR(lladdr)
|
||||
#endif
|
||||
|
||||
#if UIP_LOGGING
|
||||
#include <stdio.h>
|
||||
void uip_log(char *msg);
|
||||
#define UIP_LOG(m) uip_log(m)
|
||||
#else
|
||||
#define UIP_LOG(m)
|
||||
#endif /* UIP_LOGGING == 1 */
|
||||
|
||||
|
||||
/*------------------------------------------------------------------*/
|
||||
/** @{ */
|
||||
/** \name Pointers to the header structures.
|
||||
* All pointers except UIP_IP_BUF depend on uip_ext_len, which at
|
||||
* packet reception, is the total length of the extension headers.
|
||||
*
|
||||
* The pointer to ND6 options header also depends on nd6_opt_offset,
|
||||
* which we set in each function.
|
||||
*
|
||||
* Care should be taken when manipulating these buffers about the
|
||||
* value of these length variables
|
||||
*/
|
||||
|
||||
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
|
||||
/**< Pointer to IP header */
|
||||
#define UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
|
||||
/**< Pointer to ICMP header*/
|
||||
/**@{ Pointers to messages just after icmp header */
|
||||
#define UIP_ND6_RS_BUF ((struct uip_nd6_rs *)&uip_buf[uip_l2_l3_icmp_hdr_len])
|
||||
#define UIP_ND6_RA_BUF ((struct uip_nd6_ra *)&uip_buf[uip_l2_l3_icmp_hdr_len])
|
||||
#define UIP_ND6_NS_BUF ((struct uip_nd6_ns *)&uip_buf[uip_l2_l3_icmp_hdr_len])
|
||||
#define UIP_ND6_NA_BUF ((struct uip_nd6_na *)&uip_buf[uip_l2_l3_icmp_hdr_len])
|
||||
#define UIP_ICMP6_ERROR_BUF ((struct uip_icmp6_error *)&uip_buf[uip_l2_l3_icmp_hdr_len])
|
||||
/** @} */
|
||||
/** Pointer to ND option */
|
||||
#define UIP_ND6_OPT_HDR_BUF ((struct uip_nd6_opt_hdr *)&uip_buf[uip_l2_l3_icmp_hdr_len + nd6_opt_offset])
|
||||
/** @} */
|
||||
|
||||
/** \brief Offset from the end of the icmpv6 header to the option in uip_buf*/
|
||||
static u8_t nd6_opt_offset;
|
||||
/** \brief Pointer to llao option in uip_buf */
|
||||
static struct uip_nd6_opt_llao *nd6_opt_llao;
|
||||
/** \brief Pointer to mtu option in uip_buf */
|
||||
static struct uip_nd6_opt_mtu *nd6_opt_mtu;
|
||||
/** \brief Pointer to prefix information option in uip_buf */
|
||||
static struct uip_nd6_opt_prefix_info *nd6_opt_prefix_info[UIP_CONF_ND6_MAX_PREFIXES];
|
||||
/** \brief Pointer to a neighbor cache entry*/
|
||||
static struct uip_nd6_neighbor *neighbor;
|
||||
/** \brief Pointer to a prefix list entry */
|
||||
static struct uip_nd6_prefix *prefix;
|
||||
/** \brief Pointer to a router list entry */
|
||||
static struct uip_nd6_defrouter *router;
|
||||
/** \brief Pointer to an interface address */
|
||||
static struct uip_netif_addr *ifaddr;
|
||||
/** \brief Index used in loops */
|
||||
static u8_t i;
|
||||
|
||||
/*------------------------------------------------------------------*/
|
||||
void
|
||||
uip_nd6_io_ns_input(void)
|
||||
{
|
||||
PRINTF("Received NS from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("with target address");
|
||||
PRINT6ADDR((uip_ipaddr_t *)(&UIP_ND6_NS_BUF->tgtipaddr));
|
||||
PRINTF("\n");
|
||||
UIP_STAT(++uip_stat.nd6.recv);
|
||||
|
||||
u8_t flags;
|
||||
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
|
||||
(uip_is_addr_mcast(&UIP_ND6_NS_BUF->tgtipaddr)) ||
|
||||
(UIP_ICMP_BUF->icode != 0))
|
||||
{
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /* UIP_CONF_IPV6_CHECKS */
|
||||
|
||||
/* Options reading: we handle only SLLAO for now */
|
||||
nd6_opt_llao = NULL;
|
||||
nd6_opt_offset = UIP_ND6_NS_LEN;
|
||||
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /* UIP_CONF_IPV6_CHECKS */
|
||||
switch(UIP_ND6_OPT_HDR_BUF->type) {
|
||||
case UIP_ND6_OPT_SLLAO:
|
||||
nd6_opt_llao = (struct uip_nd6_opt_llao *)UIP_ND6_OPT_HDR_BUF;
|
||||
break;
|
||||
default:
|
||||
UIP_LOG("ND option not supported in NS");
|
||||
break;
|
||||
}
|
||||
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
|
||||
}
|
||||
|
||||
/* Options processing: only SLLAO */
|
||||
if(nd6_opt_llao != NULL) {
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
/* There must be NO option in a DAD NS */
|
||||
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
|
||||
goto badpkt;
|
||||
} else {
|
||||
#endif /*UIP_CONF_IPV6_CHECKS*/
|
||||
neighbor = uip_nd6_nbrcache_lookup(&UIP_IP_BUF->srcipaddr);
|
||||
if(neighbor == NULL) {
|
||||
/* we need to add the neighbor*/
|
||||
uip_nd6_nbrcache_add(&UIP_IP_BUF->srcipaddr,
|
||||
&nd6_opt_llao->addr, 0, STALE);
|
||||
} else {
|
||||
/* If LL address changed, set neighbor state to stale */
|
||||
if(memcmp(&nd6_opt_llao->addr, &neighbor->lladdr, UIP_LLADDR_LEN) != 0) {
|
||||
memcpy(&neighbor->lladdr, &nd6_opt_llao->addr, UIP_LLADDR_LEN);
|
||||
neighbor->state = STALE;
|
||||
} else {
|
||||
/* If neighbor state is INCOMPLETE, set to STALE */
|
||||
if(neighbor->state == INCOMPLETE) {
|
||||
neighbor->state = STALE;
|
||||
}
|
||||
}
|
||||
}
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_CHECKS*/
|
||||
}
|
||||
|
||||
/*
|
||||
* Rest of NS processing: Depends on the purpose of the NS: NUD or DAD or
|
||||
* Address Resolution
|
||||
*/
|
||||
/** \note we use ifaddr to remember the target address */
|
||||
ifaddr = uip_netif_addr_lookup(&UIP_ND6_NS_BUF->tgtipaddr, 128, 0);
|
||||
if(ifaddr != NULL) {
|
||||
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)){
|
||||
/* DAD CASE */
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
/* Dst address must be solicited node mcast address */
|
||||
if(!uip_netif_is_addr_my_solicited(&UIP_IP_BUF->destipaddr)){
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /* UIP_CONF_IPV6_CHECKS */
|
||||
/*
|
||||
* If my address is not tentative, then send a NA to all nodes with
|
||||
* TLLAO flags are: override = yes.
|
||||
*/
|
||||
if(ifaddr->state!=TENTATIVE) {
|
||||
/*
|
||||
* we need to send a NA, we set the src, dest, flags. tgt remains the
|
||||
* same and the rest is done at "create_na"
|
||||
*/
|
||||
uip_create_linklocal_allnodes_mcast(&UIP_IP_BUF->destipaddr);
|
||||
uip_netif_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
|
||||
flags = UIP_ND6_NA_FLAG_OVERRIDE;
|
||||
goto create_na;
|
||||
} else {
|
||||
/** \todo if I sent a NS before him, I win */
|
||||
uip_netif_dad_failed(&UIP_ND6_NS_BUF->tgtipaddr);
|
||||
goto discard;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
/* Duplicate check */
|
||||
if(uip_netif_is_addr_my_unicast(&UIP_IP_BUF->srcipaddr)) {
|
||||
/**
|
||||
* \NOTE do we do something here? we both are using the same address.
|
||||
* If we are doing dad, we could cancel it, though we should receive a
|
||||
* NA in response of DAD NS we sent, hence DAD will fail anyway. If we
|
||||
* were not doing DAD, it means there is a duplicate in the network!
|
||||
*/
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_CHECKS*/
|
||||
|
||||
/* Address resolution case */
|
||||
if(uip_netif_is_addr_my_solicited(&UIP_IP_BUF->destipaddr)){
|
||||
/*
|
||||
* we need to send a NA, we set the src, dest, flags. The rest is
|
||||
* set at the "create_na" label.
|
||||
*/
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_ND6_NS_BUF->tgtipaddr);
|
||||
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
|
||||
goto create_na;
|
||||
}
|
||||
|
||||
/*
|
||||
* NUD CASE. at this point the packet must be for us! we check this,
|
||||
* and at the same time if target == dest
|
||||
*/
|
||||
if(uip_netif_addr_lookup(&UIP_IP_BUF->destipaddr, 128, 0) == ifaddr){
|
||||
/*
|
||||
* we need to send a NA, we set the src, dest, flags. The rest is set
|
||||
* at the "create_na" label.
|
||||
*/
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_ND6_NS_BUF->tgtipaddr);
|
||||
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
|
||||
goto create_na;
|
||||
} else {
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
goto badpkt;
|
||||
#endif /* UIP_CONF_IPV6_CHECKS */
|
||||
}
|
||||
} else {
|
||||
goto discard;
|
||||
}
|
||||
|
||||
|
||||
create_na:
|
||||
/*
|
||||
* Fill the part of the NA which is common to all NAs. If the NS contained
|
||||
* extension headers, we must set the target address properly
|
||||
*/
|
||||
uip_ext_len = 0;
|
||||
|
||||
/* IP header */
|
||||
UIP_IP_BUF->vtc = 0x60;
|
||||
UIP_IP_BUF->tcflow = 0;
|
||||
UIP_IP_BUF->flow = 0;
|
||||
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
|
||||
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
|
||||
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
|
||||
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
|
||||
|
||||
/* ICMP header */
|
||||
UIP_ICMP_BUF->type = ICMP6_NA;
|
||||
UIP_ICMP_BUF->icode = 0;
|
||||
|
||||
/* NA static part */
|
||||
UIP_ND6_NA_BUF->flagsreserved = flags;
|
||||
memcpy(&UIP_ND6_NA_BUF->tgtipaddr, &ifaddr->ipaddr, sizeof(uip_ipaddr_t));
|
||||
|
||||
/* NA option: TLLAO. note that length field is in unit of 8 bytes */
|
||||
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
|
||||
nd6_opt_llao = (struct uip_nd6_opt_llao *)&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NA_LEN];
|
||||
nd6_opt_llao->type = UIP_ND6_OPT_TLLAO;
|
||||
nd6_opt_llao->len = UIP_ND6_OPT_LLAO_LEN >> 3;
|
||||
memcpy(&(nd6_opt_llao->addr), &uip_lladdr, UIP_LLADDR_LEN);
|
||||
/* padding if needed */
|
||||
memset((void *)(&nd6_opt_llao->addr) + UIP_LLADDR_LEN, 0, UIP_ND6_OPT_LLAO_LEN - 2 - UIP_LLADDR_LEN);
|
||||
|
||||
/*ICMP checksum*/
|
||||
UIP_ICMP_BUF->icmpchksum = 0;
|
||||
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
|
||||
|
||||
|
||||
UIP_STAT(++uip_stat.nd6.sent);
|
||||
PRINTF("Sending NA to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("with target address");
|
||||
PRINT6ADDR(&UIP_ND6_NA_BUF->tgtipaddr);
|
||||
PRINTF("\n");
|
||||
return;
|
||||
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
badpkt:
|
||||
UIP_STAT(++uip_stat.nd6.drop);
|
||||
UIP_LOG("NS received is bad");
|
||||
#endif /* UIP_CONF_IPV6_CHECKS */
|
||||
|
||||
discard:
|
||||
uip_len = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*------------------------------------------------------------------*/
|
||||
void
|
||||
uip_nd6_io_ns_output(uip_ipaddr_t *src, uip_ipaddr_t *dest, uip_ipaddr_t *tgt)
|
||||
{
|
||||
/* IP header fields */
|
||||
uip_ext_len = 0;
|
||||
UIP_IP_BUF->vtc = 0x60;
|
||||
UIP_IP_BUF->tcflow = 0;
|
||||
UIP_IP_BUF->flow = 0;
|
||||
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
|
||||
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
|
||||
|
||||
/*
|
||||
* The caller must put a valid tgt address.
|
||||
* For dest, if the caller is doing DAD or Address resolution, he sets
|
||||
* dest to NULL and we forge dest as the sollicited node mcast address
|
||||
* for tgt.
|
||||
* If the caller is sending the NS for NUD, dest is unicast and the caller
|
||||
* specifies it in the arguments
|
||||
*/
|
||||
if(dest == NULL) {
|
||||
uip_create_solicited_node(tgt, &UIP_IP_BUF->destipaddr);
|
||||
} else {
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, dest);
|
||||
}
|
||||
UIP_ICMP_BUF->type = ICMP6_NS;
|
||||
UIP_ICMP_BUF->icode = 0;
|
||||
UIP_ND6_NS_BUF->reserved = 0;
|
||||
|
||||
/* Copy the tgt address */
|
||||
uip_ipaddr_copy((uip_ipaddr_t *)&UIP_ND6_NS_BUF->tgtipaddr, tgt);
|
||||
|
||||
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
|
||||
/*
|
||||
* check if we add a SLLAO option: for DAD, MUST NOT, for NUD, MAY
|
||||
* (here yes), for Address resolution , MUST
|
||||
* i.e. if and only if tgt is our address (in this case it is DAD), we do
|
||||
* not add it
|
||||
*/
|
||||
if(!(uip_netif_is_addr_my_unicast(tgt))) {
|
||||
if(src != NULL) {
|
||||
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, src);
|
||||
} else {
|
||||
uip_netif_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
|
||||
}
|
||||
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NS_LEN + UIP_ND6_OPT_LLAO_LEN;
|
||||
|
||||
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NS_LEN + UIP_ND6_OPT_LLAO_LEN;
|
||||
nd6_opt_llao = (struct uip_nd6_opt_llao *)&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NS_LEN];
|
||||
nd6_opt_llao->type = UIP_ND6_OPT_SLLAO; /* type of the option */
|
||||
/*
|
||||
* length of the option: 2 bytes for type, length, plus the length of
|
||||
* the L2 address. It must be in units of 8 bytes
|
||||
*/
|
||||
nd6_opt_llao->len = UIP_ND6_OPT_LLAO_LEN >> 3;
|
||||
memcpy(&nd6_opt_llao->addr, &uip_lladdr, UIP_LLADDR_LEN);
|
||||
/* padding if needed */
|
||||
memset((void *)(&nd6_opt_llao->addr) + UIP_LLADDR_LEN, 0, UIP_ND6_OPT_LLAO_LEN - 2 - UIP_LLADDR_LEN);
|
||||
}
|
||||
else {
|
||||
uip_create_unspecified(&UIP_IP_BUF->srcipaddr);
|
||||
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NS_LEN;
|
||||
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NS_LEN;
|
||||
}
|
||||
|
||||
UIP_ICMP_BUF->icmpchksum = 0;
|
||||
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
|
||||
|
||||
UIP_STAT(++uip_stat.nd6.sent);
|
||||
PRINTF("Sending NS to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("with target address");
|
||||
PRINT6ADDR(tgt);
|
||||
PRINTF("\n");
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*------------------------------------------------------------------*/
|
||||
void
|
||||
uip_nd6_io_na_input(void)
|
||||
{
|
||||
|
||||
PRINTF("Received NA from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("with target address");
|
||||
PRINT6ADDR((uip_ipaddr_t *)(&UIP_ND6_NA_BUF->tgtipaddr));
|
||||
PRINTF("\n");
|
||||
UIP_STAT(++uip_stat.nd6.recv);
|
||||
|
||||
/*
|
||||
* booleans. the three last one are not 0 or 1 but 0 or 0x80, 0x40, 0x20
|
||||
* but it works. Be careful though, do not use tests such as is_router == 1
|
||||
*/
|
||||
u8_t is_llchange = 0;
|
||||
u8_t is_router = ((UIP_ND6_NA_BUF->flagsreserved & UIP_ND6_NA_FLAG_ROUTER));
|
||||
u8_t is_solicited = ((UIP_ND6_NA_BUF->flagsreserved & UIP_ND6_NA_FLAG_SOLICITED));
|
||||
u8_t is_override = ((UIP_ND6_NA_BUF->flagsreserved & UIP_ND6_NA_FLAG_OVERRIDE));
|
||||
|
||||
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
/*
|
||||
* Check hop limit / icmp code
|
||||
* target address must not be multicast
|
||||
* if the NA is solicited, dest must not be multicast
|
||||
*/
|
||||
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
|
||||
(UIP_ICMP_BUF->icode != 0) ||
|
||||
(uip_is_addr_mcast(&UIP_ND6_NA_BUF->tgtipaddr)) ||
|
||||
(is_solicited && uip_is_addr_mcast(&UIP_IP_BUF->destipaddr))) {
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_CHECKS*/
|
||||
|
||||
/* Options reading: we can handle TLLAO, and must ignore othehrs */
|
||||
nd6_opt_offset = UIP_ND6_NA_LEN;
|
||||
nd6_opt_llao = NULL;
|
||||
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_CHECKS*/
|
||||
switch(UIP_ND6_OPT_HDR_BUF->type) {
|
||||
case UIP_ND6_OPT_TLLAO:
|
||||
nd6_opt_llao = (struct uip_nd6_opt_llao *)UIP_ND6_OPT_HDR_BUF;
|
||||
break;
|
||||
default:
|
||||
UIP_LOG("ND option not supported in NA");
|
||||
break;
|
||||
}
|
||||
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
|
||||
}
|
||||
ifaddr = uip_netif_addr_lookup(&UIP_ND6_NA_BUF->tgtipaddr, 128, 0);
|
||||
/* Message processing, including TLLAO if any */
|
||||
if(ifaddr != NULL) {
|
||||
if(ifaddr->state == TENTATIVE) {
|
||||
/*It means DAD failed*/
|
||||
uip_netif_dad_failed(&UIP_ND6_NA_BUF->tgtipaddr);
|
||||
}
|
||||
goto discard;
|
||||
} else {
|
||||
neighbor = uip_nd6_nbrcache_lookup(&UIP_ND6_NA_BUF->tgtipaddr);
|
||||
/* if the neighbor entry does not exist, silently discard */
|
||||
if(neighbor == NULL) {
|
||||
goto discard;
|
||||
}
|
||||
if(nd6_opt_llao != 0) {
|
||||
is_llchange = memcmp((void *)&nd6_opt_llao->addr, (void *)(&neighbor->lladdr), UIP_LLADDR_LEN);
|
||||
}
|
||||
if(neighbor->state == INCOMPLETE){
|
||||
if(nd6_opt_llao == 0) {
|
||||
goto discard;
|
||||
}
|
||||
memcpy(&neighbor->lladdr, &nd6_opt_llao->addr, UIP_LLADDR_LEN);
|
||||
if(is_solicited) {
|
||||
neighbor->state = REACHABLE;
|
||||
/* reachable time is stored in ms*/
|
||||
timer_set(&(neighbor->reachable),
|
||||
uip_netif_physical_if.reachable_time * CLOCK_SECOND / 1000);
|
||||
|
||||
} else {
|
||||
neighbor->state = STALE;
|
||||
}
|
||||
neighbor->isrouter = is_router;
|
||||
} else {
|
||||
if(!is_override && is_llchange) {
|
||||
if(neighbor->state == REACHABLE) {
|
||||
neighbor->state = STALE;
|
||||
}
|
||||
goto discard;
|
||||
} else {
|
||||
if(is_override
|
||||
|| (!is_override && nd6_opt_llao != 0 && !is_llchange)
|
||||
|| nd6_opt_llao == 0) {
|
||||
|
||||
/* update LL address if any */
|
||||
if(nd6_opt_llao != 0) {
|
||||
memcpy(&neighbor->lladdr, &nd6_opt_llao->addr, UIP_LLADDR_LEN);
|
||||
}
|
||||
|
||||
/*
|
||||
* if the NA was solicited, change the state of the neighbor to
|
||||
* reachabe. Otherwise and if the neighbor LL changed, set the
|
||||
* state to STALE
|
||||
*/
|
||||
if(is_solicited) {
|
||||
neighbor->state = REACHABLE;
|
||||
/* reachable time is stored in ms*/
|
||||
timer_set(&(neighbor->reachable),
|
||||
uip_netif_physical_if.reachable_time*CLOCK_SECOND/1000);
|
||||
|
||||
} else {
|
||||
if(nd6_opt_llao != 0 && is_llchange) {
|
||||
neighbor->state = STALE;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if(neighbor->isrouter && !is_router){
|
||||
/* the neighbor stopped being a router, we remove it from the list */
|
||||
router = uip_nd6_defrouter_lookup(neighbor);
|
||||
if(router != NULL){
|
||||
uip_nd6_defrouter_rm(router);
|
||||
}
|
||||
}
|
||||
neighbor->isrouter = is_router;
|
||||
}
|
||||
}
|
||||
|
||||
#if UIP_CONF_IPV6_QUEUE_PKT
|
||||
/* The neighbor is now reachable, check if we had buffered a pkt for it */
|
||||
if(neighbor->queue_buf_len != 0) {
|
||||
uip_len = neighbor->queue_buf_len;
|
||||
memcpy(UIP_IP_BUF, neighbor->queue_buf, uip_len);
|
||||
neighbor->queue_buf_len = 0;
|
||||
return;
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
|
||||
uip_len = 0;
|
||||
return;
|
||||
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
badpkt:
|
||||
UIP_STAT(++uip_stat.nd6.drop);
|
||||
UIP_LOG("NA received is bad");
|
||||
#endif /* UIP_CONF_IPV6_CHECKS */
|
||||
|
||||
discard:
|
||||
uip_len = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_nd6_io_rs_output(void) {
|
||||
UIP_IP_BUF->vtc = 0x60;
|
||||
UIP_IP_BUF->tcflow = 0;
|
||||
UIP_IP_BUF->flow = 0;
|
||||
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
|
||||
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
|
||||
uip_create_linklocal_allrouters_mcast(&UIP_IP_BUF->destipaddr);
|
||||
uip_netif_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
|
||||
UIP_ICMP_BUF->type = ICMP6_RS;
|
||||
UIP_ICMP_BUF->icode = 0;
|
||||
UIP_ND6_RS_BUF->reserved = 0;
|
||||
|
||||
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
|
||||
|
||||
/* we add the SLLAO option only if src is not unspecified */
|
||||
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
|
||||
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_RS_LEN;
|
||||
uip_len = uip_l3_icmp_hdr_len + UIP_ND6_RS_LEN;
|
||||
} else {
|
||||
uip_len = uip_l3_icmp_hdr_len + UIP_ND6_RS_LEN + UIP_ND6_OPT_LLAO_LEN;
|
||||
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_RS_LEN + UIP_ND6_OPT_LLAO_LEN;
|
||||
nd6_opt_llao = (struct uip_nd6_opt_llao *)&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_RS_LEN];
|
||||
nd6_opt_llao->type = UIP_ND6_OPT_SLLAO; /* type of the option */
|
||||
nd6_opt_llao->len = UIP_ND6_OPT_LLAO_LEN >> 3;
|
||||
/* length of the option in units of 8 bytes */
|
||||
memcpy(&nd6_opt_llao->addr, &uip_lladdr, UIP_LLADDR_LEN);
|
||||
/* padding if needed */
|
||||
memset((void *)(&nd6_opt_llao->addr) + UIP_LLADDR_LEN, 0, UIP_ND6_OPT_LLAO_LEN - 2 - UIP_LLADDR_LEN);
|
||||
}
|
||||
|
||||
|
||||
UIP_ICMP_BUF->icmpchksum = 0;
|
||||
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
|
||||
|
||||
UIP_STAT(++uip_stat.nd6.sent);
|
||||
|
||||
PRINTF("Sendin RS to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("\n");
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_nd6_io_ra_input(void) {
|
||||
PRINTF("Received RA from");
|
||||
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
||||
PRINTF("to");
|
||||
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
||||
PRINTF("\n");
|
||||
UIP_STAT(++uip_stat.nd6.recv);
|
||||
|
||||
|
||||
#if UIP_CONF_IPV6_CHECKS
|
||||
/* a few validity checks */
|
||||
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
|
||||
(!uip_is_addr_link_local(&UIP_IP_BUF->srcipaddr)) ||
|
||||
(UIP_ICMP_BUF->icode != 0)) {
|
||||
goto badpkt;
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_CHECKS*/
|
||||
|
||||
/*
|
||||
* process the fields of the constant part
|
||||
* As per RFC 4861, for reachable time and retrans timer, a value of 0 means
|
||||
* unspecified by this router.
|
||||
* If router lifetime is 0, the router SHOULD NOT be placed in default
|
||||
* router list
|
||||
*/
|
||||
if(UIP_ND6_RA_BUF->cur_ttl != 0) {
|
||||
uip_netif_physical_if.cur_hop_limit = UIP_ND6_RA_BUF->cur_ttl;
|
||||
PRINTF("uip_netif_physical_if.cur_hop_limit %d\n", uip_netif_physical_if.cur_hop_limit);
|
||||
}
|
||||
/*
|
||||
* As per RFC4861 section 6.3.4, if reachable time field is non zero
|
||||
* and defers from the current base reachable time for the interface,
|
||||
* set base reachable time to the new value and recompute the reachable time
|
||||
* as a random value distributed between 0.5 and 1.5 x Base reachable time
|
||||
*/
|
||||
if(UIP_ND6_RA_BUF->reachable_time != 0) {
|
||||
if(uip_netif_physical_if.base_reachable_time != ntohl(UIP_ND6_RA_BUF->reachable_time)) {
|
||||
uip_netif_physical_if.base_reachable_time = ntohl(UIP_ND6_RA_BUF->reachable_time);
|
||||
uip_netif_physical_if.reachable_time = uip_netif_compute_reachable_time();
|
||||
}
|
||||
}
|
||||
if(UIP_ND6_RA_BUF->retrans_timer !=0) {
|
||||
uip_netif_physical_if.retrans_timer = ntohl(UIP_ND6_RA_BUF->retrans_timer);
|
||||
}
|
||||
|
||||
/*
|
||||
* Note: in our implementation, an entry in the default router list contains
|
||||
* does not contain the IP address of the router. The entry has a pointer
|
||||
* to the corresponding neighbor cache entry, where the IP address is stored
|
||||
*/
|
||||
/* Options reading: possible options are MTU, SLLAO, prefix */
|
||||
nd6_opt_llao = NULL;
|
||||
nd6_opt_mtu = NULL;
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_PREFIXES; i++) {
|
||||
nd6_opt_prefix_info[i] = NULL;
|
||||
}
|
||||
nd6_opt_offset = UIP_ND6_RA_LEN;
|
||||
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
|
||||
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
|
||||
goto badpkt;
|
||||
}
|
||||
switch(UIP_ND6_OPT_HDR_BUF->type) {
|
||||
case UIP_ND6_OPT_SLLAO:
|
||||
nd6_opt_llao = (struct uip_nd6_opt_llao *)UIP_ND6_OPT_HDR_BUF;
|
||||
break;
|
||||
case UIP_ND6_OPT_MTU:
|
||||
nd6_opt_mtu = (struct uip_nd6_opt_mtu *)UIP_ND6_OPT_HDR_BUF;
|
||||
break;
|
||||
case UIP_ND6_OPT_PREFIX_INFO:
|
||||
i = 0;
|
||||
while((i < UIP_CONF_ND6_MAX_PREFIXES) && (nd6_opt_prefix_info[i] != NULL)) {
|
||||
i++;
|
||||
}
|
||||
if(i < UIP_CONF_ND6_MAX_PREFIXES) {
|
||||
nd6_opt_prefix_info[i] = (struct uip_nd6_opt_prefix_info *)UIP_ND6_OPT_HDR_BUF;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
UIP_LOG("ND option not supported in RA");
|
||||
break;
|
||||
}
|
||||
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
|
||||
}
|
||||
|
||||
/* Process the MTU option if any */
|
||||
if(nd6_opt_mtu != NULL) {
|
||||
/* just set the link MTU to the value specified. Note that this option */
|
||||
PRINTF("Processing MTU option in RA\n");
|
||||
uip_netif_physical_if.link_mtu = ntohl(nd6_opt_mtu->mtu);
|
||||
}
|
||||
|
||||
/* Prefix information options processing */
|
||||
i = 0;
|
||||
while((i < UIP_CONF_ND6_MAX_PREFIXES) && (nd6_opt_prefix_info[i] != NULL)) {
|
||||
PRINTF("Processing PREFIX option in RA\n");
|
||||
|
||||
if((ntohl((nd6_opt_prefix_info[i])->validlt) >=
|
||||
ntohl((nd6_opt_prefix_info[i])->preferredlt)) &&
|
||||
(!uip_is_addr_link_local(&nd6_opt_prefix_info[i]->prefix))) {
|
||||
/* on-link flag related processing*/
|
||||
if(((nd6_opt_prefix_info[i])->flagsreserved1 & 0x80) == 0x80) {
|
||||
prefix = uip_nd6_prefix_lookup(&(nd6_opt_prefix_info[i])->prefix);
|
||||
if(prefix == NULL) {
|
||||
if((nd6_opt_prefix_info[i])->validlt != 0){
|
||||
if((nd6_opt_prefix_info[i])->validlt != UIP_ND6_INFINITE_LIFETIME){
|
||||
prefix = uip_nd6_prefix_add(&(nd6_opt_prefix_info[i])->prefix,
|
||||
(nd6_opt_prefix_info[i])->preflen,
|
||||
ntohl((nd6_opt_prefix_info[i])->validlt)*CLOCK_SECOND);
|
||||
} else {
|
||||
prefix = uip_nd6_prefix_add(&(nd6_opt_prefix_info[i])->prefix,
|
||||
(nd6_opt_prefix_info[i])->preflen,
|
||||
0);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* we update or remove an existing prefix */
|
||||
switch((nd6_opt_prefix_info[i])->validlt) {
|
||||
case 0:
|
||||
uip_nd6_prefix_rm(prefix);
|
||||
break;
|
||||
case UIP_ND6_INFINITE_LIFETIME:
|
||||
prefix->is_infinite = 1;
|
||||
break;
|
||||
default:
|
||||
timer_set(&prefix->vlifetime, ntohl((nd6_opt_prefix_info[i])->validlt)*CLOCK_SECOND);
|
||||
/*in case the prefix lifetime was previously infinite */
|
||||
prefix->is_infinite = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
/* End of on-link flag related processing */
|
||||
/* autonomous flag related processing*/
|
||||
if((((nd6_opt_prefix_info[i])->flagsreserved1 & 0x40) == 0x40) &&
|
||||
((nd6_opt_prefix_info[i])->validlt != 0)){
|
||||
ifaddr = uip_netif_addr_lookup(&(nd6_opt_prefix_info[i])->prefix,
|
||||
(nd6_opt_prefix_info[i])->preflen,
|
||||
AUTOCONF);
|
||||
if(ifaddr != NULL) {
|
||||
if((nd6_opt_prefix_info[i])->validlt != UIP_ND6_INFINITE_LIFETIME) {
|
||||
/* The processing below is defined in RFC4862 section 5.5.3 e */
|
||||
if((ntohl((nd6_opt_prefix_info[i])->validlt) > 2 * 60 * 60) ||
|
||||
(ntohl((nd6_opt_prefix_info[i])->validlt) * CLOCK_SECOND > timer_remaining(&ifaddr->vlifetime))) {
|
||||
PRINTF("Updating timer of address");
|
||||
PRINT6ADDR(&ifaddr->ipaddr);
|
||||
PRINTF("new value %d\n", ntohl((nd6_opt_prefix_info[i])->validlt));
|
||||
timer_set(&ifaddr->vlifetime, ntohl((nd6_opt_prefix_info[i])->validlt) * CLOCK_SECOND);
|
||||
} else {
|
||||
/** \TODO below overflows on raven, i.e. when times are on
|
||||
16 bits */
|
||||
timer_set(&ifaddr->vlifetime, 2 * 60 * 60 * CLOCK_SECOND);
|
||||
PRINTF("Updating timer of address ");
|
||||
PRINT6ADDR(&ifaddr->ipaddr);
|
||||
PRINTF("new value %d\n", 2 * 60 * 60);
|
||||
}
|
||||
/*in case the address lifetime was previously infinite */
|
||||
ifaddr->is_infinite = 0;
|
||||
} else {
|
||||
ifaddr->is_infinite = 1;
|
||||
}
|
||||
} else {
|
||||
/* Autoconfigure an address*/
|
||||
if((nd6_opt_prefix_info[i])->validlt != UIP_ND6_INFINITE_LIFETIME) {
|
||||
/* Add an address with FINITE lifetime */
|
||||
uip_netif_addr_add(&(nd6_opt_prefix_info[i])->prefix,
|
||||
(nd6_opt_prefix_info[i])->preflen,
|
||||
ntohl((nd6_opt_prefix_info[i])->validlt)*CLOCK_SECOND,
|
||||
AUTOCONF);
|
||||
} else {
|
||||
/* Add an address with INFINITE lifetime */
|
||||
uip_netif_addr_add(&(nd6_opt_prefix_info[i])->prefix,
|
||||
(nd6_opt_prefix_info[i])->preflen,
|
||||
0,
|
||||
AUTOCONF);
|
||||
}
|
||||
}
|
||||
}
|
||||
/* End of autonomous flag related processing */
|
||||
}
|
||||
i++;
|
||||
}
|
||||
/* End of Prefix Information Option processing*/
|
||||
|
||||
|
||||
/* SLLAO option processing */
|
||||
neighbor = uip_nd6_nbrcache_lookup(&UIP_IP_BUF->srcipaddr);
|
||||
if(nd6_opt_llao != NULL) {
|
||||
PRINTF("Processing SLLAO option in RA\n");
|
||||
if(neighbor == NULL) {
|
||||
neighbor = uip_nd6_nbrcache_add(&UIP_IP_BUF->srcipaddr,
|
||||
&nd6_opt_llao->addr, 1, STALE);
|
||||
} else {
|
||||
if(neighbor->state == INCOMPLETE) {
|
||||
neighbor->state = STALE;
|
||||
}
|
||||
/* check if there was an address change. it applies to the case
|
||||
* where if the router ND entry was in state NO_STATE */
|
||||
if(memcmp(&nd6_opt_llao->addr, &neighbor->lladdr, UIP_LLADDR_LEN) != 0) {
|
||||
memcpy(&neighbor->lladdr, &nd6_opt_llao->addr, UIP_LLADDR_LEN);
|
||||
neighbor->state = STALE;
|
||||
}
|
||||
/*in case the neighbor was not a router before */
|
||||
neighbor->isrouter = 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* As per RFC4861, section 6.3.4, and considering that in our
|
||||
* implementation, a router entry contains a pointer to an existing
|
||||
* neighbor entry:
|
||||
* if router lifetime != 0, if entry present in def router list
|
||||
* (and therefore neighbor cache), update timer, and update neighbor entry
|
||||
* if needed
|
||||
* else add entry to both router list (and neighbor cache if absent)
|
||||
* else delete entry in router list if it exists
|
||||
*/
|
||||
if(UIP_ND6_RA_BUF->router_lifetime != 0) {
|
||||
/* Add router or update timer, we need a neighbor entry for this */
|
||||
if(neighbor == NULL) {
|
||||
neighbor = uip_nd6_nbrcache_add(&UIP_IP_BUF->srcipaddr, NULL, 1, NO_STATE);
|
||||
} else {
|
||||
/* in case the neighbor was not a router before */
|
||||
neighbor->isrouter = 1;
|
||||
}
|
||||
if((router = uip_nd6_defrouter_lookup(neighbor)) == NULL) {
|
||||
uip_nd6_defrouter_add(neighbor, ntohs(UIP_ND6_RA_BUF->router_lifetime)*CLOCK_SECOND);
|
||||
} else {
|
||||
timer_set(&(router->lifetime), ntohs(UIP_ND6_RA_BUF->router_lifetime)*CLOCK_SECOND);
|
||||
}
|
||||
} else {
|
||||
/* delete router entry*/
|
||||
if(neighbor != NULL) {
|
||||
router = uip_nd6_defrouter_lookup(neighbor);
|
||||
if(router != NULL) {
|
||||
uip_nd6_defrouter_rm(router);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#if UIP_CONF_IPV6_QUEUE_PKT
|
||||
/*
|
||||
* If the neighbor just became reachable (e.g. it was in INCOMPLETE state
|
||||
* and we got a SLLAO), check if we had buffered a pkt for it
|
||||
*/
|
||||
if((neighbor != NULL) && (neighbor->queue_buf_len != 0)) {
|
||||
uip_len = neighbor->queue_buf_len;
|
||||
memcpy(UIP_IP_BUF, neighbor->queue_buf, uip_len);
|
||||
neighbor->queue_buf_len = 0;
|
||||
return;
|
||||
}
|
||||
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
|
||||
uip_len = 0;
|
||||
return;
|
||||
|
||||
badpkt:
|
||||
UIP_STAT(++uip_stat.nd6.drop);
|
||||
UIP_LOG("RA received is bad");
|
||||
uip_len = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
/** @} */
|
||||
471
core/net/uip-nd6.c
Normal file
471
core/net/uip-nd6.c
Normal file
@ -0,0 +1,471 @@
|
||||
/**
|
||||
* \addtogroup uip6
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Neighbor discovery (RFC 4861)
|
||||
* \author Mathilde Durvy <mdurvy@cisco.com>
|
||||
* \author Julien Abeille <jabeille@cisco.com>
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
||||
* 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 project 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 PROJECT 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 PROJECT 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.
|
||||
*/
|
||||
/*
|
||||
* Copyright (c) 2006, 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#include "net/uip-nd6.h"
|
||||
#include "net/uip-netif.h"
|
||||
#include "lib/random.h"
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#define DEBUG 0
|
||||
#if DEBUG
|
||||
#include <stdio.h>
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
|
||||
#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
|
||||
#else
|
||||
#define PRINTF(...)
|
||||
#define PRINT6ADDR(addr)
|
||||
#define PRINTLLADDR(addr)
|
||||
#endif
|
||||
|
||||
#if UIP_LOGGING
|
||||
#include <stdio.h>
|
||||
void uip_log(char *msg);
|
||||
#define UIP_LOG(m) uip_log(m)
|
||||
#else
|
||||
#define UIP_LOG(m)
|
||||
#endif /* UIP_LOGGING == 1 */
|
||||
|
||||
/** Remove a neighbor cache entry */
|
||||
#define uip_nd6_nbrcache_rm(neighbor) do { \
|
||||
PRINTF("Removing neighbor with ip addr"); \
|
||||
PRINT6ADDR(&neighbor->ipaddr); \
|
||||
PRINTF("\n"); \
|
||||
neighbor->used = 0; \
|
||||
} while(0)
|
||||
|
||||
|
||||
/**
|
||||
* \brief Timer for maintenance of neighbor cache, prefix list, and default
|
||||
* router lists
|
||||
*/
|
||||
struct etimer uip_nd6_timer_periodic;
|
||||
/** \brief Neighor cache */
|
||||
static struct uip_nd6_neighbor uip_nd6_nbrcache_list[UIP_CONF_ND6_MAX_NEIGHBORS];
|
||||
/** \brief Default router list */
|
||||
static struct uip_nd6_defrouter uip_nd6_defrouter_list[UIP_CONF_ND6_MAX_DEFROUTERS];
|
||||
/** \brief Prefix list */
|
||||
static struct uip_nd6_prefix uip_nd6_prefix_list[UIP_CONF_ND6_MAX_PREFIXES];
|
||||
|
||||
/** \name Temp variables*/
|
||||
/** @{*/
|
||||
static u8_t i;
|
||||
static struct uip_nd6_prefix *prefix;
|
||||
static struct uip_nd6_neighbor *neighbor;
|
||||
static struct uip_nd6_defrouter *router;
|
||||
/** @}*/
|
||||
|
||||
|
||||
void
|
||||
uip_nd6_init(void)
|
||||
{
|
||||
/* INITIALIZE NEIGHBOR DISCOVERY*/
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_NEIGHBORS; i ++) {
|
||||
uip_nd6_nbrcache_list[i].used = 0;
|
||||
}
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_DEFROUTERS; i ++) {
|
||||
uip_nd6_defrouter_list[i].used = 0;
|
||||
}
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_PREFIXES; i ++) {
|
||||
uip_nd6_prefix_list[i].used = 0;
|
||||
}
|
||||
|
||||
/* create link local prefix */
|
||||
uip_ip6addr(&(uip_nd6_prefix_list[0].ipaddr), 0xfe80, 0, 0, 0, 0, 0, 0, 0);
|
||||
uip_nd6_prefix_list[0].length = UIP_DEFAULT_PREFIX_LEN;
|
||||
uip_nd6_prefix_list[0].used = 1;
|
||||
uip_nd6_prefix_list[0].is_infinite = 1;
|
||||
|
||||
/* we check the ND structures every 100ms */
|
||||
etimer_set(&uip_nd6_timer_periodic, 0.1 * CLOCK_SECOND);
|
||||
}
|
||||
|
||||
struct uip_nd6_neighbor *
|
||||
uip_nd6_nbrcache_lookup(uip_ipaddr_t *ipaddr)
|
||||
{
|
||||
neighbor = NULL;
|
||||
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_NEIGHBORS; i ++) {
|
||||
if(uip_nd6_nbrcache_list[i].used == 0) {
|
||||
continue;
|
||||
}
|
||||
if(uip_ipaddr_cmp(&uip_nd6_nbrcache_list[i].ipaddr, ipaddr)) {
|
||||
neighbor = &uip_nd6_nbrcache_list[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
return neighbor;
|
||||
}
|
||||
|
||||
struct uip_nd6_neighbor *
|
||||
uip_nd6_nbrcache_add(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr,
|
||||
u8_t isrouter, uip_neighbor_state state)
|
||||
{
|
||||
neighbor = NULL;
|
||||
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_NEIGHBORS; ++i) {
|
||||
if(uip_nd6_nbrcache_list[i].used == 0) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(i == UIP_CONF_ND6_MAX_NEIGHBORS){
|
||||
i = (u8_t)(random_rand()%UIP_CONF_ND6_MAX_NEIGHBORS);
|
||||
UIP_LOG("CACHE FULL");
|
||||
}
|
||||
|
||||
neighbor = &(uip_nd6_nbrcache_list[i]);
|
||||
uip_ipaddr_copy(&(neighbor->ipaddr), ipaddr);
|
||||
if(lladdr != NULL){
|
||||
memcpy(&(neighbor->lladdr), lladdr, UIP_LLADDR_LEN);
|
||||
} else {
|
||||
memset(&(neighbor->lladdr), 0, UIP_LLADDR_LEN);
|
||||
}
|
||||
PRINTF("Adding neighbor with ip addr");
|
||||
PRINT6ADDR(ipaddr);
|
||||
PRINTF("link addr");
|
||||
PRINTLLADDR((&(neighbor->lladdr)));
|
||||
PRINTF("state %d\n", state);
|
||||
|
||||
neighbor->isrouter = isrouter;
|
||||
neighbor->state = state;
|
||||
/* timers are set separately, for now we put them in expired state */
|
||||
timer_set(&(neighbor->reachable),0);
|
||||
timer_set(&(neighbor->last_send),0);
|
||||
neighbor->count_send = 0;
|
||||
neighbor->used = 1;
|
||||
return neighbor;
|
||||
}
|
||||
|
||||
|
||||
struct uip_nd6_defrouter *
|
||||
uip_nd6_defrouter_lookup(struct uip_nd6_neighbor *neighbor)
|
||||
{
|
||||
router = NULL;
|
||||
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_DEFROUTERS; i ++) {
|
||||
if(uip_nd6_defrouter_list[i].used == 0) {
|
||||
continue;
|
||||
}
|
||||
if(uip_nd6_defrouter_list[i].nb == neighbor) {
|
||||
router = &uip_nd6_defrouter_list[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
return router;
|
||||
}
|
||||
|
||||
struct uip_nd6_defrouter *
|
||||
uip_nd6_choose_defrouter(void)
|
||||
{
|
||||
router = NULL;
|
||||
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_DEFROUTERS; i ++) {
|
||||
if(uip_nd6_defrouter_list[i].used == 0) {
|
||||
continue;
|
||||
}
|
||||
if(uip_nd6_defrouter_list[i].nb == NULL){
|
||||
continue;
|
||||
}
|
||||
if(uip_nd6_defrouter_list[i].nb->state == INCOMPLETE ||
|
||||
uip_nd6_defrouter_list[i].nb->state == NO_STATE){
|
||||
if(router == NULL)
|
||||
router = &(uip_nd6_defrouter_list[i]);
|
||||
} else {
|
||||
router = &(uip_nd6_defrouter_list[i]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return router;
|
||||
}
|
||||
|
||||
void
|
||||
uip_nd6_defrouter_rm(struct uip_nd6_defrouter *router)
|
||||
{
|
||||
PRINTF("Removing defrouter with ip addr");
|
||||
PRINT6ADDR(&((router->nb)->ipaddr));
|
||||
PRINTF("\n");
|
||||
router->used = 0;
|
||||
if(((router->nb)->state) == NO_STATE){
|
||||
/* Also remove the corresponding neighbor cache entry */
|
||||
uip_nd6_nbrcache_rm(router->nb);
|
||||
}
|
||||
}
|
||||
|
||||
struct uip_nd6_defrouter *
|
||||
uip_nd6_defrouter_add(struct uip_nd6_neighbor *neighbor, clock_time_t interval)
|
||||
{
|
||||
router = NULL;
|
||||
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_DEFROUTERS; ++i) {
|
||||
if(uip_nd6_defrouter_list[i].used == 0) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(i == UIP_CONF_ND6_MAX_DEFROUTERS){
|
||||
UIP_LOG("Defrouter list full");
|
||||
i = (u8_t)(random_rand()%UIP_CONF_ND6_MAX_DEFROUTERS);
|
||||
}
|
||||
|
||||
router = &(uip_nd6_defrouter_list[i]);
|
||||
router->nb = neighbor;
|
||||
|
||||
PRINTF("Adding defrouter with ip addr");
|
||||
PRINT6ADDR(&neighbor->ipaddr);
|
||||
PRINTF("\n");
|
||||
|
||||
timer_set(&(router->lifetime),interval);
|
||||
uip_nd6_defrouter_list[i].used = 1;
|
||||
|
||||
return router;
|
||||
}
|
||||
|
||||
u8_t
|
||||
uip_nd6_is_addr_onlink(uip_ipaddr_t *ipaddr)
|
||||
{
|
||||
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_PREFIXES; i ++) {
|
||||
if(uip_nd6_prefix_list[i].used == 0){
|
||||
continue;
|
||||
}
|
||||
if(uip_ipaddr_prefixcmp(&uip_nd6_prefix_list[i].ipaddr,
|
||||
ipaddr, uip_nd6_prefix_list[i].length)){
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct uip_nd6_prefix *
|
||||
uip_nd6_prefix_lookup(uip_ipaddr_t *ipaddr)
|
||||
{
|
||||
prefix = NULL;
|
||||
|
||||
for (i = 0; i < UIP_CONF_ND6_MAX_PREFIXES; i ++) {
|
||||
if (uip_nd6_prefix_list[i].used == 0){
|
||||
continue;
|
||||
}
|
||||
if (uip_ipaddr_cmp(&uip_nd6_prefix_list[i].ipaddr, ipaddr)) {
|
||||
prefix = &uip_nd6_prefix_list[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
return prefix;
|
||||
}
|
||||
|
||||
struct uip_nd6_prefix *
|
||||
uip_nd6_prefix_add(uip_ipaddr_t *ipaddr, u8_t length, clock_time_t interval){
|
||||
|
||||
prefix = NULL;
|
||||
|
||||
/*
|
||||
* we start at 1: we do not want to overwrite the link local
|
||||
* prefix
|
||||
*/
|
||||
for(i = 1; i < UIP_CONF_ND6_MAX_PREFIXES; ++i) {
|
||||
if(uip_nd6_prefix_list[i].used == 0) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(i == UIP_CONF_ND6_MAX_PREFIXES){
|
||||
UIP_LOG("Prefix list full");
|
||||
/*
|
||||
* we do not want it to pick the first entry, which
|
||||
* is the link local prefix
|
||||
*/
|
||||
i = (u8_t)(random_rand()%(UIP_CONF_ND6_MAX_PREFIXES -1) + 1);
|
||||
PRINTF("Prefix list full, picking index %x\n\n", i);
|
||||
}
|
||||
prefix = &(uip_nd6_prefix_list[i]);
|
||||
uip_ipaddr_copy(&(prefix->ipaddr), ipaddr);
|
||||
prefix->length = length;
|
||||
|
||||
PRINTF("Adding prefix ");
|
||||
PRINT6ADDR(&prefix->ipaddr);
|
||||
PRINTF("length %d, vlifetime * CLOCK_SECOND %d\n", length, (u16_t)interval);
|
||||
|
||||
if(interval != 0){
|
||||
timer_set(&(prefix->vlifetime),interval);
|
||||
prefix->is_infinite = 0;
|
||||
} else {
|
||||
prefix->is_infinite = 1;
|
||||
}
|
||||
|
||||
uip_nd6_prefix_list[i].used = 1;
|
||||
return prefix;
|
||||
}
|
||||
|
||||
|
||||
void uip_nd6_prefix_rm(struct uip_nd6_prefix *prefix) {
|
||||
PRINTF("Removing prefix ");
|
||||
PRINT6ADDR(&prefix->ipaddr);
|
||||
PRINTF("length %d\n", prefix->length);
|
||||
prefix->used = 0;
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
uip_nd6_periodic(void)
|
||||
{
|
||||
|
||||
etimer_reset(&uip_nd6_timer_periodic);
|
||||
|
||||
/*PERIODIC PROCESSING FOR DEFAULT ROUTER LIST*/
|
||||
router = NULL;
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_DEFROUTERS; i ++) {
|
||||
if(uip_nd6_defrouter_list[i].used == 1) {
|
||||
router = &(uip_nd6_defrouter_list[i]);
|
||||
if (timer_expired(&(router->lifetime))) {
|
||||
uip_nd6_defrouter_rm(router);
|
||||
}
|
||||
}
|
||||
}
|
||||
/*PERIODIC PROCESSING FOR NEIGHBOR CACHE*/
|
||||
neighbor = NULL;
|
||||
for(i = 0; i < UIP_CONF_ND6_MAX_NEIGHBORS; i ++) {
|
||||
if(uip_nd6_nbrcache_list[i].used == 1) {
|
||||
neighbor = &(uip_nd6_nbrcache_list[i]);
|
||||
switch (neighbor->state) {
|
||||
case INCOMPLETE:
|
||||
if(neighbor->count_send >= UIP_ND6_MAX_MULTICAST_SOLICIT) {
|
||||
uip_nd6_nbrcache_list[i].used = 0;
|
||||
}
|
||||
else if(timer_expired(&(neighbor->last_send))) {
|
||||
PRINTF("INCOMPLETE: NS %d\n",neighbor->count_send+1);
|
||||
uip_nd6_io_ns_output(NULL, NULL, &neighbor->ipaddr);
|
||||
timer_set(&(neighbor->last_send),
|
||||
uip_netif_physical_if.retrans_timer/1000*CLOCK_SECOND);
|
||||
neighbor->count_send++;
|
||||
}
|
||||
break;
|
||||
case REACHABLE:
|
||||
if(timer_expired(&(neighbor->reachable))) {
|
||||
PRINTF("REACHABLE: moving to STALE (");
|
||||
PRINT6ADDR(&neighbor->ipaddr);
|
||||
PRINTF(")\n");
|
||||
|
||||
neighbor->state = STALE;
|
||||
neighbor->count_send = 0;
|
||||
}
|
||||
break;
|
||||
case DELAY:
|
||||
if(timer_expired(&(neighbor->reachable))) {
|
||||
neighbor->state = PROBE;
|
||||
neighbor->count_send = 0;
|
||||
PRINTF("DELAY: moving to PROBE + NS %d\n", neighbor->count_send+1);
|
||||
uip_nd6_io_ns_output(NULL, &neighbor->ipaddr, &neighbor->ipaddr);
|
||||
timer_set(&(neighbor->last_send),
|
||||
uip_netif_physical_if.retrans_timer/1000*CLOCK_SECOND);
|
||||
neighbor->count_send++;
|
||||
}
|
||||
break;
|
||||
case PROBE:
|
||||
if(neighbor->count_send >= UIP_ND6_MAX_UNICAST_SOLICIT) {
|
||||
PRINTF("PROBE END \n");
|
||||
neighbor->count_send = 0;
|
||||
/* remove any corresponding default router (if any)*/
|
||||
router = uip_nd6_defrouter_lookup(neighbor);
|
||||
if(router != NULL)
|
||||
uip_nd6_defrouter_rm(router);
|
||||
/* remove neighbor cache entry */
|
||||
uip_nd6_nbrcache_rm(neighbor);
|
||||
continue;
|
||||
}
|
||||
if(timer_expired(&(neighbor->last_send))){
|
||||
PRINTF("PROBE: NS %d\n",neighbor->count_send+1);
|
||||
uip_nd6_io_ns_output(NULL, &neighbor->ipaddr, &neighbor->ipaddr);
|
||||
timer_set(&(neighbor->last_send),
|
||||
uip_netif_physical_if.retrans_timer/1000*CLOCK_SECOND);
|
||||
neighbor->count_send++;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
/*PERIODIC PROCESSING FOR PREFIX LIST*/
|
||||
prefix = NULL;
|
||||
/*
|
||||
* we start with i=1 because the first prefix is the link-local prefix
|
||||
* and therefore has INFINITE an lifetime
|
||||
*/
|
||||
for(i = 1; i < UIP_CONF_ND6_MAX_PREFIXES; i ++) {
|
||||
if(uip_nd6_prefix_list[i].used == 1) {
|
||||
prefix = &(uip_nd6_prefix_list[i]);
|
||||
if((prefix->is_infinite == 0) &&
|
||||
(timer_expired(&(prefix->vlifetime)))) {
|
||||
/* remove prefix */
|
||||
uip_nd6_prefix_rm(prefix);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
/** @} */
|
||||
688
core/net/uip-nd6.h
Normal file
688
core/net/uip-nd6.h
Normal file
@ -0,0 +1,688 @@
|
||||
/**
|
||||
* \addtogroup uip6
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Neighbor discovery (RFC 4861)
|
||||
* \author Julien Abeille <jabeille@cisco.com>
|
||||
* \author Mathilde Durvy <mdurvy@cisco.com>
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2006, 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __UIP_ND6_H__
|
||||
#define __UIP_ND6_H__
|
||||
|
||||
#include "net/uip.h"
|
||||
|
||||
/**
|
||||
* \name General
|
||||
* @{
|
||||
*/
|
||||
/** \brief HOP LIMIT to be used when sending ND messages (255) */
|
||||
#define UIP_ND6_HOP_LIMIT 255
|
||||
/** \brief INFINITE lifetime */
|
||||
#define UIP_ND6_INFINITE_LIFETIME 0xFFFFFFFF
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name Configuration options */
|
||||
/** @{ */
|
||||
#ifndef UIP_CONF_ND6_MAX_NEIGHBORS
|
||||
/** \brief max number of entries in the neighbor cache */
|
||||
#define UIP_CONF_ND6_MAX_NEIGHBORS 4
|
||||
#endif /*UIP_CONF_ND6_MAX_NEIGHBORS*/
|
||||
#ifndef UIP_CONF_ND6_MAX_DEFROUTERS
|
||||
/** \brief max number of entries in the default router cache */
|
||||
#define UIP_CONF_ND6_MAX_DEFROUTERS 2
|
||||
#endif /*UIP_CONF_ND6_MAX_DEFROUTERS*/
|
||||
#ifndef UIP_CONF_ND6_MAX_PREFIXES
|
||||
/** \brief max number of entries in the prefix list */
|
||||
#define UIP_CONF_ND6_MAX_PREFIXES 2
|
||||
#endif /*UIP_CONF_ND6_MAX_PREFIXES*/
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name RFC 4861 Host constant */
|
||||
/** @{ */
|
||||
#define UIP_ND6_MAX_RTR_SOLICITATION_DELAY 1
|
||||
#define UIP_ND6_RTR_SOLICITATION_INTERVAL 4
|
||||
#define UIP_ND6_MAX_RTR_SOLICITATIONS 3
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name RFC 4861 Node constant */
|
||||
#define UIP_ND6_MAX_MULTICAST_SOLICIT 3
|
||||
#define UIP_ND6_MAX_UNICAST_SOLICIT 3
|
||||
#define UIP_ND6_REACHABLE_TIME 30000
|
||||
#define UIP_ND6_RETRANS_TIMER 1000
|
||||
#define UIP_ND6_DELAY_FIRST_PROBE_TIME 5
|
||||
#define UIP_ND6_MIN_RANDOM_FACTOR 0.5
|
||||
#define UIP_ND6_MAX_RANDOM_FACTOR 1.5
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name ND6 option types */
|
||||
/** @{ */
|
||||
#define UIP_ND6_OPT_SLLAO 1
|
||||
#define UIP_ND6_OPT_TLLAO 2
|
||||
#define UIP_ND6_OPT_PREFIX_INFO 3
|
||||
#define UIP_ND6_OPT_REDIRECTED_HDR 4
|
||||
#define UIP_ND6_OPT_MTU 5
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name ND6 message length (excluding options) */
|
||||
/** @{ */
|
||||
#define UIP_ND6_NA_LEN 20
|
||||
#define UIP_ND6_NS_LEN 20
|
||||
#define UIP_ND6_RA_LEN 12
|
||||
#define UIP_ND6_RS_LEN 4
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name ND6 option length in bytes */
|
||||
/** @{ */
|
||||
#define UIP_ND6_OPT_HDR_LEN 2
|
||||
#define UIP_ND6_OPT_PREFIX_INFO_LEN 32
|
||||
#define UIP_ND6_OPT_MTU_LEN 8
|
||||
|
||||
|
||||
/* Length of TLLAO and SLLAO options, it is L2 dependant */
|
||||
#if UIP_CONF_LL_802154
|
||||
/* If the interface is 802.15.4. For now we use only long addresses */
|
||||
#define UIP_ND6_OPT_SHORT_LLAO_LEN 8
|
||||
#define UIP_ND6_OPT_LONG_LLAO_LEN 16
|
||||
/** \brief length of a ND6 LLAO option for 802.15.4 */
|
||||
#define UIP_ND6_OPT_LLAO_LEN UIP_ND6_OPT_LONG_LLAO_LEN
|
||||
#else /*UIP_CONF_LL_802154*/
|
||||
#if UIP_CONF_LL_80211
|
||||
/* If the interface is 802.11 */
|
||||
/** \brief length of a ND6 LLAO option for 802.11 */
|
||||
#define UIP_ND6_OPT_LLAO_LEN 8
|
||||
#else /*UIP_CONF_LL_80211*/
|
||||
/** \brief length of a ND6 LLAO option for default L2 type (e.g. Ethernet) */
|
||||
#define UIP_ND6_OPT_LLAO_LEN 8
|
||||
#endif /*UIP_CONF_LL_80211*/
|
||||
#endif /*UIP_CONF_LL_802154*/
|
||||
/** @} */
|
||||
|
||||
|
||||
/** \name Neighbor Advertisement flags masks */
|
||||
/** @{ */
|
||||
#define UIP_ND6_NA_FLAG_ROUTER 0x80
|
||||
#define UIP_ND6_NA_FLAG_SOLICITED 0x40
|
||||
#define UIP_ND6_NA_FLAG_OVERRIDE 0x20
|
||||
/** @} */
|
||||
|
||||
|
||||
/**
|
||||
* \brief Possible states for the neighbor cache entries
|
||||
*
|
||||
* NO_STATE is for implementation purposes: a router entry contains a pointer
|
||||
* to a neighbor entry, which holds its ip address. If we do not know the LL
|
||||
* address of the router, we do not have to create a neighbor entry as per
|
||||
* RFC 4861. However, we still need to have the IP of the router stored in a
|
||||
* neighbor entry, hence we create an entry in the NO_STATE state
|
||||
*/
|
||||
typedef enum {
|
||||
INCOMPLETE = 0,
|
||||
REACHABLE = 1,
|
||||
STALE = 2,
|
||||
DELAY = 3,
|
||||
PROBE = 4,
|
||||
NO_STATE = 5
|
||||
} uip_neighbor_state;
|
||||
|
||||
/**
|
||||
* \name ND structures
|
||||
* @{
|
||||
*/
|
||||
/** \brief An entry in the neighbor cache */
|
||||
struct uip_nd6_neighbor{
|
||||
uip_ipaddr_t ipaddr;
|
||||
uip_lladdr_t lladdr;
|
||||
u8_t isrouter;
|
||||
uip_neighbor_state state;
|
||||
struct timer reachable;
|
||||
struct timer last_send; /**< last time a ND message was sent */
|
||||
u8_t count_send; /**< how many ND message were already sent */
|
||||
u8_t used; /**< brief is this neighbor currently used */
|
||||
#if UIP_CONF_IPV6_QUEUE_PKT
|
||||
u8_t queue_buf[UIP_BUFSIZE - UIP_LLH_LEN];
|
||||
/**< buffer to hold one packet during address resolution */
|
||||
u8_t queue_buf_len;
|
||||
/**< length of the pkt in buffer, used as "boolean" as well*/
|
||||
#endif /*UIP_CONF_QUEUE_PKT*/
|
||||
};
|
||||
|
||||
|
||||
/** \brief An entry in the default router list */
|
||||
struct uip_nd6_defrouter {
|
||||
struct uip_nd6_neighbor *nb;
|
||||
struct timer lifetime;
|
||||
/**< the lifetime contained in RA corresponds to the interval field
|
||||
* of the timer
|
||||
*/
|
||||
u8_t used; /**< Is this default router entry currently used */
|
||||
};
|
||||
|
||||
/** \brief A prefix list entry */
|
||||
struct uip_nd6_prefix {
|
||||
uip_ipaddr_t ipaddr;
|
||||
u8_t length;
|
||||
/**< we do not use preferred lifetime, which is always smaller than
|
||||
* valid lifetime (for addr, preferred->deprecated)
|
||||
*/
|
||||
struct timer vlifetime;
|
||||
u8_t is_infinite; /**< Is the prefix lifetime INFINITE */
|
||||
u8_t used; /**< Is this prefix entry currently used */
|
||||
};
|
||||
/** @} */
|
||||
|
||||
extern struct etimer uip_nd6_timer_periodic;
|
||||
|
||||
/**
|
||||
* \note
|
||||
* We do not use a destination cache, do next-hop determination each time
|
||||
* a packet needs to be sent. (info such as rtt, path mtu could be stored
|
||||
* in uip_conn)
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* \name ND message structures
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \brief A neighbor solicitation constant part
|
||||
*
|
||||
* Possible option is: SLLAO
|
||||
*/
|
||||
struct uip_nd6_ns {
|
||||
u32_t reserved;
|
||||
uip_ipaddr_t tgtipaddr;
|
||||
};
|
||||
|
||||
/**
|
||||
* \brief A neighbor advertisement constant part.
|
||||
*
|
||||
* Possible option is: TLLAO
|
||||
*/
|
||||
struct uip_nd6_na {
|
||||
u8_t flagsreserved;
|
||||
u8_t reserved[3];
|
||||
uip_ipaddr_t tgtipaddr;
|
||||
};
|
||||
|
||||
/**
|
||||
* \brief A router solicitation constant part
|
||||
*
|
||||
* Possible option is: SLLAO
|
||||
*/
|
||||
struct uip_nd6_rs {
|
||||
u32_t reserved;
|
||||
};
|
||||
|
||||
/**
|
||||
* \brief A router advertisement constant part
|
||||
*
|
||||
* Possible options are: SLLAO, MTU, Prefix Information
|
||||
*/
|
||||
struct uip_nd6_ra {
|
||||
u8_t cur_ttl;
|
||||
u8_t flags_reserved;
|
||||
u16_t router_lifetime;
|
||||
u32_t reachable_time;
|
||||
u32_t retrans_timer;
|
||||
};
|
||||
|
||||
/**
|
||||
* \brief A redirect message constant part
|
||||
*
|
||||
* Possible options are: TLLAO, redirected header
|
||||
*/
|
||||
struct uip_nd6_redirect {
|
||||
u32_t reserved;
|
||||
uip_ipaddr_t tgtipaddress;
|
||||
uip_ipaddr_t destipaddress;
|
||||
};
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name ND Option structures
|
||||
* @{
|
||||
*/
|
||||
|
||||
/** \brief ND option header */
|
||||
struct uip_nd6_opt_hdr {
|
||||
u8_t type;
|
||||
u8_t len;
|
||||
};
|
||||
|
||||
/** \brief ND option prefix information */
|
||||
struct uip_nd6_opt_prefix_info {
|
||||
u8_t type;
|
||||
u8_t len;
|
||||
u8_t preflen;
|
||||
u8_t flagsreserved1;
|
||||
u32_t validlt;
|
||||
u32_t preferredlt;
|
||||
u32_t reserved2;
|
||||
uip_ipaddr_t prefix;
|
||||
};
|
||||
|
||||
/** \brief ND option MTU */
|
||||
struct uip_nd6_opt_mtu {
|
||||
u8_t type;
|
||||
u8_t len;
|
||||
u16_t reserved;
|
||||
u32_t mtu;
|
||||
};
|
||||
|
||||
/** \brief ND option: both TLLAO and SLLAO */
|
||||
struct uip_nd6_opt_llao {
|
||||
u8_t type;
|
||||
u8_t len;
|
||||
uip_lladdr_t addr;
|
||||
};
|
||||
|
||||
/** \struct Redirected header option */
|
||||
struct uip_nd6_opt_redirected_hdr {
|
||||
u8_t type;
|
||||
u8_t len;
|
||||
u8_t reserved[6];
|
||||
};
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name ND Neighbor Cache, Router List and Prefix List handling functions
|
||||
* @{
|
||||
*/
|
||||
/**
|
||||
* \brief Initialize Neighbor Discovery structures
|
||||
*/
|
||||
void uip_nd6_init(void);
|
||||
|
||||
/**
|
||||
* \brief Periodic processing of Neighbor Discovery Structures
|
||||
*/
|
||||
void uip_nd6_periodic(void);
|
||||
|
||||
/**
|
||||
* \brief Look for a neighbor cache entry corresponding to a specific IP
|
||||
* address
|
||||
* \param ipaddr the specific IP address
|
||||
* \return the corresponding neighbor cache entry
|
||||
*/
|
||||
struct uip_nd6_neighbor *uip_nd6_nbrcache_lookup(uip_ipaddr_t *ipaddr);
|
||||
|
||||
/**
|
||||
* \brief Add a neighbor cache entry
|
||||
* \param ipaddr the IP address of the entry
|
||||
* \param lladdr the layer 2 address of the entry
|
||||
* \param isrouter true is the entry is a router
|
||||
* \param state the state of the entry
|
||||
* \return the new neighbor or updated cache entry
|
||||
*/
|
||||
struct uip_nd6_neighbor * uip_nd6_nbrcache_add(uip_ipaddr_t *ipaddr,
|
||||
uip_lladdr_t *lladdr,
|
||||
u8_t isrouter,
|
||||
uip_neighbor_state state);
|
||||
/**
|
||||
* \brief Returns a default router
|
||||
*/
|
||||
struct uip_nd6_defrouter * uip_nd6_choose_defrouter(void);
|
||||
|
||||
/**
|
||||
* \brief Find a default router corresponding to a given neighbor cache entry
|
||||
* \param neighbor the neighbor cache entry
|
||||
* \return the corresponding router if any
|
||||
*/
|
||||
struct uip_nd6_defrouter *
|
||||
uip_nd6_defrouter_lookup(struct uip_nd6_neighbor *neighbor);
|
||||
|
||||
/**
|
||||
* \brief Remove a default router
|
||||
* \param router to be removed
|
||||
*/
|
||||
void uip_nd6_defrouter_rm(struct uip_nd6_defrouter *router);
|
||||
|
||||
/**
|
||||
* \brief Add a default router
|
||||
* \param neighbor the corresponding neighbor cache entry
|
||||
* \param interval the lifetime of the router
|
||||
* \return the new or updated defrouter entry
|
||||
*/
|
||||
struct uip_nd6_defrouter *
|
||||
uip_nd6_defrouter_add(struct uip_nd6_neighbor *neighbor, clock_time_t interval);
|
||||
|
||||
/**
|
||||
* \brief Check if an IP address in on-link by looking at prefix list
|
||||
* \param ipaddr an IP address
|
||||
* \return true if on-link
|
||||
*/
|
||||
u8_t uip_nd6_is_addr_onlink(uip_ipaddr_t *ipaddr);
|
||||
|
||||
/**
|
||||
* \brief Find a given prefix
|
||||
* \param ipaddr an IP address
|
||||
* \return the corresponding prefix if any
|
||||
*/
|
||||
struct uip_nd6_prefix *
|
||||
uip_nd6_prefix_lookup(uip_ipaddr_t *ipaddr);
|
||||
|
||||
/**
|
||||
* \brief Add a prefix
|
||||
* \param ipaddr the IP address of the prefix
|
||||
* \param length the length of the prefix
|
||||
* \param interval the lifetime of the prefix
|
||||
* \return the new or updated prefix entry
|
||||
*/
|
||||
struct uip_nd6_prefix *
|
||||
uip_nd6_prefix_add(uip_ipaddr_t *ipaddr, u8_t length, clock_time_t interval);
|
||||
|
||||
/**
|
||||
* \brief Remove a prefix from th eprefix list
|
||||
* \param prefix pointer to the prefix to be removed
|
||||
*/
|
||||
void
|
||||
uip_nd6_prefix_rm(struct uip_nd6_prefix *prefix);
|
||||
/** @} */
|
||||
|
||||
|
||||
/**
|
||||
* \name ND Messages Processing and Generation
|
||||
* @{
|
||||
*/
|
||||
/**
|
||||
* \brief Process a neighbor solicitation
|
||||
*
|
||||
* The NS can be received in 3 cases (procedures):
|
||||
* - sender is performing DAD (ip src = unspecified, no SLLAO option)
|
||||
* - sender is performing NUD (ip dst = unicast)
|
||||
* - sender is performing address resolution (ip dest = solicited node mcast
|
||||
* address)
|
||||
*
|
||||
* We do:
|
||||
* - if the tgt belongs to me, reply, otherwise ignore
|
||||
* - if i was performing DAD for the same address, two cases:
|
||||
* -- I already sent a NS, hence I win
|
||||
* -- I did not send a NS yet, hence I lose
|
||||
*
|
||||
* If we need to send a NA in response (i.e. the NS was done for NUD, or
|
||||
* address resolution, or DAD and there is a conflict), we do it in this
|
||||
* function: set src, dst, tgt address in the three cases, then for all cases
|
||||
* set the rest, including SLLAO
|
||||
*
|
||||
*/
|
||||
void
|
||||
uip_nd6_io_ns_input(void);
|
||||
|
||||
/**
|
||||
* \brief Send a neighbor solicitation, send a Neighbor Advertisement
|
||||
* \param src pointer to the src of the NS if known
|
||||
* \param dest pointer to ip address to send the NS, for DAD or ADDR Resol,
|
||||
* MUST be NULL, for NUD, must be correct unicast dest
|
||||
* \param tgt pointer to ip address to fill the target address field, must
|
||||
* not be NULL
|
||||
*
|
||||
* - RFC 4861, 7.2.2 :
|
||||
* "If the source address of the packet prompting the solicitation is the
|
||||
* same as one of the addresses assigned to the outgoing interface, that
|
||||
* address SHOULD be placed in the IP Source Address of the outgoing
|
||||
* solicitation. Otherwise, any one of the addresses assigned to the
|
||||
* interface should be used."
|
||||
* This is why we have a src ip address as argument. If NULL, we will do
|
||||
* src address selection, otherwise we use the argument.
|
||||
*
|
||||
* - we check if it is a NS for Address resolution or NUD, if yes we include
|
||||
* a SLLAO option, otherwise no.
|
||||
*/
|
||||
void
|
||||
uip_nd6_io_ns_output(uip_ipaddr_t *src, uip_ipaddr_t *dest, uip_ipaddr_t *tgt);
|
||||
|
||||
/**
|
||||
* \brief Process a Neighbor Advertisement
|
||||
*
|
||||
* we might have to send a pkt that had been buffered while address
|
||||
* resolution was performed (if we support buffering, see UIP_CONF_QUEUE_PKT)
|
||||
*
|
||||
* As per RFC 4861, on link layer that have addresses, TLLAO options MUST be
|
||||
* included when responding to multicast solicitations, SHOULD be included in
|
||||
* response to unicast (here we assume it is for now)
|
||||
*
|
||||
* NA can be received after sending NS for DAD, Address resolution or NUD. Can
|
||||
* be unsolicited as well.
|
||||
* It can trigger update of the state of the neighbor in the neighbor cache,
|
||||
* router in the router list.
|
||||
* If the NS was for DAD, it means DAD failed
|
||||
*
|
||||
*/
|
||||
void
|
||||
uip_nd6_io_na_input(void);
|
||||
|
||||
/**
|
||||
* \brief Send a Router Solicitation
|
||||
*
|
||||
* src is chosen through the uip_netif_select_src function. If src is
|
||||
* unspecified (i.e. we do not have a preferred address yet), then we do not
|
||||
* put a SLLAO option (MUST NOT in RFC 4861). Otherwise we do.
|
||||
*
|
||||
* RS message format,
|
||||
* possible option is SLLAO, MUST NOT be included if source = unspecified
|
||||
* SHOULD be included otherwise
|
||||
*/
|
||||
void uip_nd6_io_rs_output(void);
|
||||
|
||||
/**
|
||||
*
|
||||
* \brief process a Router Advertisement
|
||||
*
|
||||
* - Possible actions when receiving a RA: add router to router list,
|
||||
* recalculate reachable time, update link hop limit, update retrans timer.
|
||||
* - If MTU option: update MTU.
|
||||
* - If SLLAO option: update entry in neighbor cache
|
||||
* - If prefix option: start autoconf, add prefix to prefix list
|
||||
*/
|
||||
void
|
||||
uip_nd6_io_ra_input(void);
|
||||
/** @} */
|
||||
|
||||
|
||||
void
|
||||
uip_appserver_addr_get(uip_ipaddr_t *ipaddr);
|
||||
/*--------------------------------------*/
|
||||
/******* ANNEX - message formats ********/
|
||||
/*--------------------------------------*/
|
||||
|
||||
/*
|
||||
* RS format. possible option is SLLAO
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Code | Checksum |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Options ...
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-
|
||||
*
|
||||
*
|
||||
* RA format. possible options: prefix information, MTU, SLLAO
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Code | Checksum |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Cur Hop Limit |M|O| Reserved | Router Lifetime |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Reachable Time |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Retrans Timer |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Options ...
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-
|
||||
*
|
||||
*
|
||||
* NS format: options should be SLLAO
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Code | Checksum |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* + Target Address +
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Options ...
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-
|
||||
*
|
||||
*
|
||||
* NA message format. possible options is TLLAO
|
||||
*
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Code | Checksum |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* |R|S|O| Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* + Target Address +
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Options ...
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-
|
||||
*
|
||||
*
|
||||
* Redirect message format. Possible options are TLLAO and Redirected header
|
||||
*
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Code | Checksum |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* + Target Address +
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* + Destination Address +
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Options ...
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-
|
||||
*
|
||||
*
|
||||
* SLLAO/TLLAO option:
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Length | Link-Layer Address ...
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*
|
||||
*
|
||||
* Prefix information option
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Length | Prefix Length |L|A| Reserved1 |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Valid Lifetime |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Preferred Lifetime |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Reserved2 |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* + Prefix +
|
||||
* | |
|
||||
* + +
|
||||
* | |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*
|
||||
*
|
||||
* MTU option
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Length | Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | MTU |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*
|
||||
*
|
||||
* Redirected header option
|
||||
*
|
||||
* 0 1 2 3
|
||||
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Length | Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Reserved |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | |
|
||||
* ~ IP header + data ~
|
||||
* | |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*
|
||||
*/
|
||||
#endif /* __UIP_ND6_H__ */
|
||||
|
||||
/** @} */
|
||||
445
core/net/uip-netif.c
Normal file
445
core/net/uip-netif.c
Normal file
@ -0,0 +1,445 @@
|
||||
/**
|
||||
* \addtogroup uip6
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Network interface and stateless autoconfiguration (RFC 4862)
|
||||
* \author Mathilde Durvy <mdurvy@cisco.com>
|
||||
* \author 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.
|
||||
*
|
||||
*
|
||||
*/
|
||||
|
||||
#include "net/uip-nd6.h"
|
||||
#include "net/uip-netif.h"
|
||||
#include "lib/random.h"
|
||||
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
|
||||
#define DEBUG 0
|
||||
#if DEBUG
|
||||
#include <stdio.h>
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
|
||||
#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
|
||||
#else
|
||||
#define PRINTF(...)
|
||||
#define PRINT6ADDR(addr)
|
||||
#define PRINTLLADDR(lladdr)
|
||||
#endif
|
||||
|
||||
#if UIP_LOGGING
|
||||
#include <stdio.h>
|
||||
void uip_log(char *msg);
|
||||
#define UIP_LOG(m) uip_log(m)
|
||||
#else
|
||||
#define UIP_LOG(m)
|
||||
#endif /* UIP_LOGGING == 1 */
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/** \brief The single physical interface */
|
||||
struct uip_netif uip_netif_physical_if;
|
||||
/** \brief DAD timer */
|
||||
struct etimer uip_netif_timer_dad;
|
||||
/** \brief The interface address on which dad is being performed */
|
||||
static struct uip_netif_addr *dad_ifaddr;
|
||||
/** \brief Number of ns already sent for DAD*/
|
||||
static u8_t dad_ns;
|
||||
/** \brief RS timer, to schedule RS sending */
|
||||
struct etimer uip_netif_timer_rs;
|
||||
/** \brief number of rs already sent */
|
||||
static u8_t rs_count;
|
||||
/** \brief index for loops */
|
||||
static u8_t i;
|
||||
/** \brief timer to check the address states */
|
||||
struct etimer uip_netif_timer_periodic;
|
||||
|
||||
|
||||
/** \brief remove an interface address, argument type is uip_netif_addr* */
|
||||
#define uip_netif_addr_rm(addr) do { \
|
||||
PRINTF("Removing address"); \
|
||||
PRINT6ADDR(&addr->ipaddr); \
|
||||
PRINTF("\n"); \
|
||||
addr->state = NOT_USED; \
|
||||
} while(0)
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_init(void)
|
||||
{
|
||||
/* INITIALIZE INTERFACE (default values for now) */
|
||||
uip_netif_physical_if.link_mtu = UIP_LINK_MTU;
|
||||
uip_netif_physical_if.cur_hop_limit = UIP_TTL;
|
||||
uip_netif_physical_if.base_reachable_time = UIP_ND6_REACHABLE_TIME;
|
||||
uip_netif_physical_if.reachable_time = uip_netif_compute_reachable_time();
|
||||
uip_netif_physical_if.retrans_timer = UIP_ND6_RETRANS_TIMER;
|
||||
uip_netif_physical_if.dup_addr_detect_transmit = 1;
|
||||
|
||||
/*
|
||||
* STATELESS AUTOCONFIGURATION of the link local address. We set it to
|
||||
* infinite (this will become really true once DAD succeeds)
|
||||
*/
|
||||
uip_ip6addr(&(uip_netif_physical_if.addresses[0].ipaddr),
|
||||
0xfe80,0,0,0,0,0,0,0);
|
||||
uip_netif_addr_autoconf_set(&(uip_netif_physical_if.addresses[0].ipaddr), &uip_lladdr);
|
||||
uip_netif_physical_if.addresses[0].state = TENTATIVE;
|
||||
uip_netif_physical_if.addresses[0].type = MANUAL;
|
||||
uip_netif_physical_if.addresses[0].is_infinite = 1;
|
||||
|
||||
/* set all other addresses to NOT_USED initialy */
|
||||
for(i = 1; i < UIP_CONF_NETIF_MAX_ADDRESSES; i ++)
|
||||
uip_netif_physical_if.addresses[i].state = NOT_USED;
|
||||
|
||||
uip_ip6addr_u8(&(uip_netif_physical_if.solicited_node_mcastaddr),
|
||||
0xff, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x01, 0xff,
|
||||
uip_lladdr.addr[UIP_LLADDR_LEN - 3],
|
||||
uip_lladdr.addr[UIP_LLADDR_LEN - 2],
|
||||
uip_lladdr.addr[UIP_LLADDR_LEN - 1]);
|
||||
/* Start DAD */
|
||||
uip_netif_sched_dad(&(uip_netif_physical_if.addresses[0]));
|
||||
|
||||
/* Find router (send rs to all-routers multicast group)) */
|
||||
uip_netif_sched_send_rs();
|
||||
|
||||
/* Reset the timer */
|
||||
etimer_set(&uip_netif_timer_periodic, CLOCK_SECOND);
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_periodic(void) {
|
||||
for(i = 1; i < UIP_CONF_NETIF_MAX_ADDRESSES; i++) {
|
||||
if((uip_netif_physical_if.addresses[i].state != NOT_USED) &&
|
||||
(uip_netif_physical_if.addresses[i].is_infinite != 1) &&
|
||||
(timer_expired(&uip_netif_physical_if.addresses[i].vlifetime))) {
|
||||
uip_netif_addr_rm((&uip_netif_physical_if.addresses[i]));
|
||||
}
|
||||
}
|
||||
etimer_reset(&uip_netif_timer_periodic);
|
||||
return;
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
u32_t
|
||||
uip_netif_compute_reachable_time(void)
|
||||
{
|
||||
return (u32_t)(uip_netif_physical_if.base_reachable_time * UIP_ND6_MIN_RANDOM_FACTOR) + ((u16_t)(random_rand() << 8) + (u16_t)random_rand()) % (u32_t)(uip_netif_physical_if.base_reachable_time *(UIP_ND6_MAX_RANDOM_FACTOR - UIP_ND6_MIN_RANDOM_FACTOR));
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
u8_t
|
||||
uip_netif_is_addr_my_solicited(uip_ipaddr_t *ipaddr)
|
||||
{
|
||||
if(uip_ipaddr_cmp(ipaddr, &uip_netif_physical_if.solicited_node_mcastaddr))
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
struct uip_netif_addr *
|
||||
uip_netif_addr_lookup(uip_ipaddr_t *ipaddr, u8_t length, uip_netif_type type) {
|
||||
for(i = 0; i < UIP_CONF_NETIF_MAX_ADDRESSES; i ++) {
|
||||
if((uip_netif_physical_if.addresses[i].state != NOT_USED) &&
|
||||
(uip_netif_physical_if.addresses[i].type == type || type == 0) &&
|
||||
(uip_ipaddr_prefixcmp(&(uip_netif_physical_if.addresses[i].ipaddr), ipaddr, length))) {
|
||||
return &uip_netif_physical_if.addresses[i];
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_addr_add(uip_ipaddr_t *ipaddr, u8_t length, clock_time_t vlifetime, uip_netif_type type) {
|
||||
|
||||
/* check prefix has the right length if we are doing autoconf */
|
||||
if((type == AUTOCONF) && (length != UIP_DEFAULT_PREFIX_LEN)) {
|
||||
UIP_LOG("Error: UNSUPPORTED PREFIX LENGTH");
|
||||
return;
|
||||
}
|
||||
|
||||
/* check if addr does not already exist and find a free entry */
|
||||
for(i = 0; i < UIP_CONF_NETIF_MAX_ADDRESSES; ++i) {
|
||||
if(uip_netif_physical_if.addresses[i].state == NOT_USED){
|
||||
/*
|
||||
* Copying address
|
||||
* If we are doing autoconf, ipaddr is a prefix, we copy the 128 bits
|
||||
* of it, then overwrite the last 64 bits with the interface ID at
|
||||
* next if statement.
|
||||
* Otherwise ipaddr is an address, we just copy it
|
||||
*/
|
||||
uip_ipaddr_copy(&uip_netif_physical_if.addresses[i].ipaddr, ipaddr);
|
||||
if(type == AUTOCONF) {
|
||||
/* construct address from prefix and layer2 id */
|
||||
uip_netif_addr_autoconf_set(&uip_netif_physical_if.addresses[i].ipaddr, &uip_lladdr);
|
||||
}
|
||||
/* setting state, type */
|
||||
uip_netif_physical_if.addresses[i].state = TENTATIVE;
|
||||
uip_netif_physical_if.addresses[i].type = type;
|
||||
/* setting lifetime timer if lieftime is not infinite */
|
||||
if(vlifetime != 0) {
|
||||
timer_set(&(uip_netif_physical_if.addresses[i].vlifetime), vlifetime);
|
||||
uip_netif_physical_if.addresses[i].is_infinite = 0;
|
||||
} else {
|
||||
uip_netif_physical_if.addresses[i].is_infinite = 1;
|
||||
}
|
||||
PRINTF("Created new address");
|
||||
PRINT6ADDR(&uip_netif_physical_if.addresses[i].ipaddr);
|
||||
PRINTF("for interface\n");
|
||||
|
||||
/* schedule DAD */
|
||||
uip_netif_sched_dad(&uip_netif_physical_if.addresses[i]);
|
||||
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* If we did not find space, log */
|
||||
UIP_LOG("ADDRESS LIST FULL");
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_addr_autoconf_set(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr)
|
||||
{
|
||||
/* We consider only links with IEEE EUI-64 identifier or
|
||||
IEEE 48-bit MAC addresses */
|
||||
#if (UIP_LLADDR_LEN == 8)
|
||||
memcpy(ipaddr->u8 + 8, lladdr, UIP_LLADDR_LEN);
|
||||
ipaddr->u8[8] ^= 0x02;
|
||||
#elif (UIP_LLADDR_LEN == 6)
|
||||
memcpy(ipaddr->u8 + 8, lladdr, 3);
|
||||
ipaddr->u8[11] = 0xff;
|
||||
ipaddr->u8[12] = 0xfe;
|
||||
memcpy(ipaddr->u8 + 13, lladdr + 3, 3);
|
||||
ipaddr->u8[8] ^= 0x02;
|
||||
#else
|
||||
UIP_LOG("CAN NOT BUIL INTERFACE IDENTIFIER");
|
||||
UIP_LOG("THE STACK IS GOING TO SHUT DOWN");
|
||||
UIP_LOG("THE HOST WILL BE UNREACHABLE");
|
||||
exit(-1);
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
u8_t
|
||||
get_match_length(uip_ipaddr_t *src, uip_ipaddr_t *dst)
|
||||
{
|
||||
u8_t j, k, x_or;
|
||||
u8_t len = 0;
|
||||
for(j = 0; j < 16; j ++) {
|
||||
if(src->u8[j] == dst->u8[j]) {
|
||||
len += 8;
|
||||
} else {
|
||||
x_or = src->u8[j] ^ dst->u8[j];
|
||||
for(k = 0; k < 8; k ++) {
|
||||
if((x_or & 0x80) == 0){
|
||||
len ++;
|
||||
x_or <<= 1;
|
||||
}
|
||||
else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_select_src(uip_ipaddr_t *src, uip_ipaddr_t *dst)
|
||||
{
|
||||
u8_t best = 0; /* number of bit in common with best match*/
|
||||
u8_t n = 0;
|
||||
u8_t index = 0;
|
||||
|
||||
if(!uip_is_addr_link_local(dst) && !uip_is_addr_mcast(dst)) {
|
||||
for(i = 1; i < UIP_CONF_NETIF_MAX_ADDRESSES; ++i) {
|
||||
if(uip_netif_physical_if.addresses[i].state == PREFERRED){
|
||||
n = get_match_length(dst, &(uip_netif_physical_if.addresses[i].ipaddr));
|
||||
if(n >= best){
|
||||
best = n;
|
||||
index = i;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
uip_ipaddr_copy(src, &(uip_netif_physical_if.addresses[index].ipaddr));
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_sched_dad(struct uip_netif_addr *ifaddr)
|
||||
{
|
||||
if(ifaddr->state != TENTATIVE){
|
||||
UIP_LOG("DAD called with non tentative address");
|
||||
return;
|
||||
}
|
||||
/*
|
||||
* check dad is not running
|
||||
*/
|
||||
if(dad_ifaddr != NULL){
|
||||
UIP_LOG("DAD already running");
|
||||
return;
|
||||
}
|
||||
/*
|
||||
* Set the interface address that is going through DAD
|
||||
*/
|
||||
dad_ifaddr = ifaddr;
|
||||
|
||||
PRINTF("Scheduling DAD for ipaddr:");
|
||||
PRINT6ADDR(&dad_ifaddr->ipaddr);
|
||||
PRINTF("\n");
|
||||
|
||||
etimer_set(&uip_netif_timer_dad, random_rand()%(UIP_ND6_MAX_RTR_SOLICITATION_DELAY*CLOCK_SECOND));
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_dad(void)
|
||||
{
|
||||
/*
|
||||
* check if dad is running
|
||||
*/
|
||||
if(dad_ifaddr == NULL){
|
||||
PRINTF("uip_netif_dad: DAD not running\n");
|
||||
return;
|
||||
}
|
||||
/*
|
||||
* send dup_addr_detect_transmit NS for DAD
|
||||
*/
|
||||
if(dad_ns < uip_netif_physical_if.dup_addr_detect_transmit) {
|
||||
uip_nd6_io_ns_output(NULL, NULL, &dad_ifaddr->ipaddr);
|
||||
dad_ns++;
|
||||
etimer_set(&uip_netif_timer_dad, uip_netif_physical_if.retrans_timer/1000*CLOCK_SECOND);
|
||||
return;
|
||||
}
|
||||
/*
|
||||
* If we arrive here it means DAD succeeded, otherwise the dad process
|
||||
* would have been interrupted in nd6_dad_ns/na_input
|
||||
*/
|
||||
PRINTF("DAD succeeded for ipaddr:");
|
||||
PRINT6ADDR(&(dad_ifaddr->ipaddr));
|
||||
PRINTF("\n");
|
||||
|
||||
etimer_stop(&uip_netif_timer_dad);
|
||||
dad_ifaddr->state = PREFERRED;
|
||||
dad_ifaddr = NULL;
|
||||
dad_ns = 0;
|
||||
/*
|
||||
* check if we need to run DAD on another address
|
||||
* This is necessary because if you receive a RA,
|
||||
* you might want to run DAD for several addresses
|
||||
* Considering that we have structures to do DAD
|
||||
* for one address only, we start DAD for the subsequent
|
||||
* addresses here
|
||||
*/
|
||||
PRINTF("END of DAD\n");
|
||||
for(i = 0; i < UIP_CONF_NETIF_MAX_ADDRESSES; i ++){
|
||||
if(uip_netif_physical_if.addresses[i].state != NOT_USED){
|
||||
PRINTF("address %d : ",i);
|
||||
PRINT6ADDR(&(uip_netif_physical_if.addresses[i].ipaddr));
|
||||
PRINTF("\n");
|
||||
}
|
||||
if(uip_netif_physical_if.addresses[i].state == TENTATIVE){
|
||||
uip_netif_sched_dad(&uip_netif_physical_if.addresses[i]);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_dad_failed(uip_ipaddr_t *ipaddr)
|
||||
{
|
||||
|
||||
UIP_LOG("DAD FAILED");
|
||||
UIP_LOG("THE STACK IS GOING TO SHUT DOWN");
|
||||
UIP_LOG("THE HOST WILL BE UNREACHABLE");
|
||||
|
||||
if(uip_ipaddr_cmp(&dad_ifaddr->ipaddr, ipaddr)){
|
||||
etimer_stop(&uip_netif_timer_dad);
|
||||
dad_ifaddr->state = NOT_USED;
|
||||
dad_ifaddr = NULL;
|
||||
dad_ns = 0;
|
||||
}
|
||||
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_sched_send_rs(void)
|
||||
{
|
||||
/* before a host sends an initial solicitation, it SHOULD delay the
|
||||
transmission for a random amount of time between 0 and
|
||||
UIP_ND6_MAX_RTR_SOLICITATION_DELAY. */
|
||||
if(rs_count == 0){
|
||||
etimer_set(&uip_netif_timer_rs, random_rand()%(UIP_ND6_MAX_RTR_SOLICITATION_DELAY*CLOCK_SECOND));
|
||||
PRINTF("Scheduling RS\n");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_netif_send_rs(void)
|
||||
{
|
||||
if((uip_nd6_choose_defrouter() == NULL) && (rs_count < UIP_ND6_MAX_RTR_SOLICITATIONS)){
|
||||
//PRINTF("Sending RS %d\n", rs_count);
|
||||
uip_nd6_io_rs_output();
|
||||
rs_count++;
|
||||
etimer_set(&uip_netif_timer_rs, UIP_ND6_RTR_SOLICITATION_INTERVAL * CLOCK_SECOND);
|
||||
} else {
|
||||
PRINTF("Router found ? (boolean): %d\n", (uip_nd6_choose_defrouter() != NULL));
|
||||
etimer_stop(&uip_netif_timer_rs);
|
||||
rs_count = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/** @} */
|
||||
207
core/net/uip-netif.h
Normal file
207
core/net/uip-netif.h
Normal file
@ -0,0 +1,207 @@
|
||||
/**
|
||||
* \addtogroup uip6
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Network interface and stateless autoconfiguration (RFC 4862)
|
||||
* \author Mathilde Durvy <mdurvy@cisco.com>
|
||||
* \author 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 __UIP_NETIF_H__
|
||||
#define __UIP_NETIF_H__
|
||||
|
||||
#include "net/uip-nd6.h"
|
||||
|
||||
#ifndef UIP_CONF_NETIF_MAX_ADDRESSES
|
||||
#define UIP_CONF_NETIF_MAX_ADDRESSES 2
|
||||
#endif /*UIP_CONF_NETIF_MAX_ADDRESSES*/
|
||||
|
||||
/**
|
||||
* \brief Possible states for the address of an interface (RFC 4862 autoconf +
|
||||
* NOT_USED + INFINITE)
|
||||
*/
|
||||
typedef enum {
|
||||
NOT_USED = -1,
|
||||
TENTATIVE = 0,
|
||||
PREFERRED = 1,
|
||||
DEPRECATED = 2, /* not needed if we don't use pliffetime in prefix struct */
|
||||
} uip_netif_state;
|
||||
|
||||
/**
|
||||
* \brief How the address was acquired: Autoconf, DHCP or manually
|
||||
*
|
||||
*/
|
||||
typedef enum {
|
||||
AUTOCONF = 1,
|
||||
DHCP = 2,
|
||||
MANUAL = 3
|
||||
} uip_netif_type;
|
||||
|
||||
/**
|
||||
* \brief An address structure for an interface
|
||||
*
|
||||
* Contains an ip address assigned to the interface, and its state.
|
||||
*/
|
||||
struct uip_netif_addr {
|
||||
uip_ipaddr_t ipaddr;
|
||||
uip_netif_state state;
|
||||
struct timer vlifetime;
|
||||
u8_t is_infinite;
|
||||
uip_netif_type type;
|
||||
};
|
||||
|
||||
/** \brief Interface structure (contains all the interface variables) */
|
||||
struct uip_netif {
|
||||
u32_t link_mtu;
|
||||
u8_t cur_hop_limit;
|
||||
u32_t base_reachable_time; /* in msec */
|
||||
u32_t reachable_time; /* in msec */
|
||||
u32_t retrans_timer; /* in msec */
|
||||
u8_t dup_addr_detect_transmit;
|
||||
/** Note: the link-local address is at position 0 */
|
||||
struct uip_netif_addr addresses[UIP_CONF_NETIF_MAX_ADDRESSES];
|
||||
uip_ipaddr_t solicited_node_mcastaddr;
|
||||
};
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
extern struct uip_netif uip_netif_physical_if;
|
||||
extern struct etimer uip_netif_timer_dad;
|
||||
extern struct etimer uip_netif_timer_rs;
|
||||
extern struct etimer uip_netif_timer_periodic;
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/** \brief Initialize the network interfac and run stateless autoconf */
|
||||
void uip_netif_init(void);
|
||||
|
||||
|
||||
/**
|
||||
* \brief periodically check the state of the addresses.
|
||||
*/
|
||||
void uip_netif_periodic(void);
|
||||
|
||||
/**
|
||||
* \brief recompute random reachable timer
|
||||
* \return the new value for timer
|
||||
*/
|
||||
u32_t uip_netif_compute_reachable_time(void);
|
||||
|
||||
/**
|
||||
* \brief Check if an unicast address is attached to my interface
|
||||
* \param ipaddr an IP address to be checked
|
||||
* \return 1 if address is attached to my interface (otherwise false)
|
||||
*/
|
||||
#define uip_netif_is_addr_my_unicast(a) (uip_netif_addr_lookup(a, 128, 0) != NULL)
|
||||
|
||||
/**
|
||||
* \brief Check if this is my solicited-node multicast address
|
||||
* \param ipaddr an IP address to be checked
|
||||
* \return 1 if the address is my solicited-node (otherwise false)
|
||||
*/
|
||||
u8_t uip_netif_is_addr_my_solicited(uip_ipaddr_t *ipaddr);
|
||||
|
||||
/**
|
||||
* \brief Autoconfigure and add an address corresponding to a specific prefix
|
||||
* \param ipaddr the prefix if we are doing autoconf, the address for DHCP and manual
|
||||
* \param length the prefix length if autoconf, 0 for DHCP and manual
|
||||
* \param vlifetime valid lifetime of the address, 0 if the address has INFINITE lifetime,
|
||||
* non 0 otherwise
|
||||
* \param type AUTOCONF or MANUAL or DHCP
|
||||
*/
|
||||
void uip_netif_addr_add(uip_ipaddr_t *ipaddr, u8_t length, clock_time_t vlifetime, uip_netif_type type);
|
||||
|
||||
/**
|
||||
* \brief Set the 8 last bytes of the IP address
|
||||
* based on the L2 identifier using autoconf
|
||||
* \param *ipaddr the IP address to be completed with layer 2 info
|
||||
* \param *lladdr the L2 address
|
||||
*/
|
||||
void uip_netif_addr_autoconf_set(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr);
|
||||
|
||||
/**
|
||||
* \brief Lookup an address
|
||||
* \param ipaddr the prefix if we are looking for an autoconf address, the address otherwise
|
||||
* \param length the prefix length if we are looking for autoconf address, 128 otherwise
|
||||
* \param type AUTOCONF or MANUAL or DHCP or 0
|
||||
*
|
||||
*
|
||||
* If we are looking for an AUTOCONFIGURED address, ipaddr is a prefix
|
||||
* length is its length, type is AUTOCONF.
|
||||
* Otherwise ipaddr is a full address, length must be 128, type is MANUAL
|
||||
* or DHCP.
|
||||
* Note: if we do not care about the type, type MUST be 0
|
||||
*/
|
||||
struct uip_netif_addr *
|
||||
uip_netif_addr_lookup(uip_ipaddr_t *ipaddr, u8_t length, uip_netif_type type);
|
||||
|
||||
/**
|
||||
* \brief Select the appropriate source address for a packet
|
||||
* \param ipaddr the selected address (returned value)
|
||||
* \param ipaddr the destination of the packet
|
||||
*/
|
||||
void uip_netif_select_src(uip_ipaddr_t *src, uip_ipaddr_t *dst);
|
||||
|
||||
/**
|
||||
* \brief Schedule DAD for a given address
|
||||
* \param ifaddr the address for which schedule DAD
|
||||
*/
|
||||
void uip_netif_sched_dad(struct uip_netif_addr *ifaddr);
|
||||
|
||||
/**
|
||||
* \brief Perform DAD (i.e. Duplicate Address Detection)
|
||||
*/
|
||||
void uip_netif_dad(void);
|
||||
|
||||
/**
|
||||
* \brief DAD failed, should never happen!
|
||||
* \param ipaddr the address for which DAD failed
|
||||
*/
|
||||
void uip_netif_dad_failed(uip_ipaddr_t *ipaddr);
|
||||
|
||||
/**
|
||||
* \brief Schedule the sending of RS
|
||||
*/
|
||||
void uip_netif_sched_send_rs(void);
|
||||
|
||||
/**
|
||||
* \brief Send up to MAX_RTR_SOLICITATION_DELAY RS separated by a delay of
|
||||
* RTR_SOLICITATION_INTERVAL
|
||||
*/
|
||||
void uip_netif_send_rs(void);
|
||||
|
||||
#endif
|
||||
|
||||
/** @} */
|
||||
|
||||
2108
core/net/uip6.c
Normal file
2108
core/net/uip6.c
Normal file
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user