198 lines
6.2 KiB
C
198 lines
6.2 KiB
C
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/**
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* @file
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*
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* IPv6 layer.
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*/
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/*
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* Copyright (c) 2010 Inico Technologies Ltd.
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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 modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* 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 products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Ivan Delamer <delamer@inicotech.com>
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*
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*
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* Please coordinate changes and requests with Ivan Delamer
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* <delamer@inicotech.com>
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*/
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#ifndef __LWIP_IP6_H__
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#define __LWIP_IP6_H__
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#include "lwip/opt.h"
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#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
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#include "lwip/ip.h"
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#include "lwip/ip6_addr.h"
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#include "lwip/def.h"
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#include "lwip/pbuf.h"
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#include "lwip/netif.h"
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#include "lwip/err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define IP6_HLEN 40
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#define IP6_NEXTH_HOPBYHOP 0
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#define IP6_NEXTH_TCP 6
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#define IP6_NEXTH_UDP 17
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#define IP6_NEXTH_ENCAPS 41
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#define IP6_NEXTH_ROUTING 43
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#define IP6_NEXTH_FRAGMENT 44
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#define IP6_NEXTH_ICMP6 58
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#define IP6_NEXTH_NONE 59
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#define IP6_NEXTH_DESTOPTS 60
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#define IP6_NEXTH_UDPLITE 136
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/* The IPv6 header. */
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct ip6_hdr {
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/* version / traffic class / flow label */
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PACK_STRUCT_FIELD(u32_t _v_tc_fl);
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/* payload length */
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PACK_STRUCT_FIELD(u16_t _plen);
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/* next header */
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PACK_STRUCT_FIELD(u8_t _nexth);
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/* hop limit */
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PACK_STRUCT_FIELD(u8_t _hoplim);
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/* source and destination IP addresses */
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PACK_STRUCT_FIELD(ip6_addr_p_t src);
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PACK_STRUCT_FIELD(ip6_addr_p_t dest);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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/* Hop-by-hop router alert option. */
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#define IP6_HBH_HLEN 8
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#define IP6_PAD1_OPTION 0
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#define IP6_PADN_ALERT_OPTION 1
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#define IP6_ROUTER_ALERT_OPTION 5
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#define IP6_ROUTER_ALERT_VALUE_MLD 0
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct ip6_hbh_hdr {
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/* next header */
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PACK_STRUCT_FIELD(u8_t _nexth);
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/* header length */
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PACK_STRUCT_FIELD(u8_t _hlen);
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/* router alert option type */
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PACK_STRUCT_FIELD(u8_t _ra_opt_type);
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/* router alert option data len */
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PACK_STRUCT_FIELD(u8_t _ra_opt_dlen);
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/* router alert option data */
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PACK_STRUCT_FIELD(u16_t _ra_opt_data);
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/* PadN option type */
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PACK_STRUCT_FIELD(u8_t _padn_opt_type);
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/* PadN option data len */
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PACK_STRUCT_FIELD(u8_t _padn_opt_dlen);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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/* Fragment header. */
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#define IP6_FRAG_HLEN 8
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#define IP6_FRAG_OFFSET_MASK 0xfff8
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#define IP6_FRAG_MORE_FLAG 0x0001
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct ip6_frag_hdr {
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/* next header */
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PACK_STRUCT_FIELD(u8_t _nexth);
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/* reserved */
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PACK_STRUCT_FIELD(u8_t reserved);
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/* fragment offset */
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PACK_STRUCT_FIELD(u16_t _fragment_offset);
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/* fragmented packet identification */
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PACK_STRUCT_FIELD(u32_t _identification);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#define IP6H_V(hdr) ((ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f)
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#define IP6H_TC(hdr) ((ntohl((hdr)->_v_tc_fl) >> 20) & 0xff)
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#define IP6H_FL(hdr) (ntohl((hdr)->_v_tc_fl) & 0x000fffff)
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#define IP6H_PLEN(hdr) (ntohs((hdr)->_plen))
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#define IP6H_NEXTH(hdr) ((hdr)->_nexth)
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#define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6)
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#define IP6H_HOPLIM(hdr) ((hdr)->_hoplim)
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#define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (htonl(((v) << 28) | ((tc) << 20) | (fl)))
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#define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = htons(plen)
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#define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth)
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#define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl)
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#define ip6_init() /* TODO should we init current addresses and header pointer? */
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struct netif *ip6_route(struct ip6_addr *src, struct ip6_addr *dest);
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ip6_addr_t *ip6_select_source_address(struct netif *netif, ip6_addr_t * dest);
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err_t ip6_input(struct pbuf *p, struct netif *inp);
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err_t ip6_output(struct pbuf *p, struct ip6_addr *src, struct ip6_addr *dest,
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u8_t hl, u8_t tc, u8_t nexth);
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err_t ip6_output_if(struct pbuf *p, struct ip6_addr *src, struct ip6_addr *dest,
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u8_t hl, u8_t tc, u8_t nexth, struct netif *netif);
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#if LWIP_NETIF_HWADDRHINT
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err_t ip6_output_hinted(struct pbuf *p, ip6_addr_t *src, ip6_addr_t *dest,
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u8_t hl, u8_t tc, u8_t nexth, u8_t *addr_hint);
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#endif /* LWIP_NETIF_HWADDRHINT */
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#if LWIP_IPV6_MLD
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err_t ip6_options_add_hbh_ra(struct pbuf * p, u8_t nexth, u8_t value);
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#endif /* LWIP_IPV6_MLD */
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#define ip6_netif_get_local_ipX(netif, dest) (((netif) != NULL) ? \
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ip6_2_ipX(ip6_select_source_address(netif, dest)) : NULL)
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#if IP6_DEBUG
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void ip6_debug_print(struct pbuf *p);
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#else
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#define ip6_debug_print(p)
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#endif /* IP6_DEBUG */
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_IPV6 */
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#endif /* __LWIP_IP6_H__ */
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