/** * @file * * IPv6 layer. */ /* * Copyright (c) 2010 Inico Technologies Ltd. * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 lwIP TCP/IP stack. * * Author: Ivan Delamer * * * Please coordinate changes and requests with Ivan Delamer * */ #ifndef __LWIP_IP6_H__ #define __LWIP_IP6_H__ #include "lwip/opt.h" #if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ #include "lwip/ip.h" #include "lwip/ip6_addr.h" #include "lwip/def.h" #include "lwip/pbuf.h" #include "lwip/netif.h" #include "lwip/err.h" #ifdef __cplusplus extern "C" { #endif #define IP6_HLEN 40 #define IP6_NEXTH_HOPBYHOP 0 #define IP6_NEXTH_TCP 6 #define IP6_NEXTH_UDP 17 #define IP6_NEXTH_ENCAPS 41 #define IP6_NEXTH_ROUTING 43 #define IP6_NEXTH_FRAGMENT 44 #define IP6_NEXTH_ICMP6 58 #define IP6_NEXTH_NONE 59 #define IP6_NEXTH_DESTOPTS 60 #define IP6_NEXTH_UDPLITE 136 /* The IPv6 header. */ #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN struct ip6_hdr { /* version / traffic class / flow label */ PACK_STRUCT_FIELD(u32_t _v_tc_fl); /* payload length */ PACK_STRUCT_FIELD(u16_t _plen); /* next header */ PACK_STRUCT_FIELD(u8_t _nexth); /* hop limit */ PACK_STRUCT_FIELD(u8_t _hoplim); /* source and destination IP addresses */ PACK_STRUCT_FIELD(ip6_addr_p_t src); PACK_STRUCT_FIELD(ip6_addr_p_t dest); } PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif /* Hop-by-hop router alert option. */ #define IP6_HBH_HLEN 8 #define IP6_PAD1_OPTION 0 #define IP6_PADN_ALERT_OPTION 1 #define IP6_ROUTER_ALERT_OPTION 5 #define IP6_ROUTER_ALERT_VALUE_MLD 0 #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN struct ip6_hbh_hdr { /* next header */ PACK_STRUCT_FIELD(u8_t _nexth); /* header length */ PACK_STRUCT_FIELD(u8_t _hlen); /* router alert option type */ PACK_STRUCT_FIELD(u8_t _ra_opt_type); /* router alert option data len */ PACK_STRUCT_FIELD(u8_t _ra_opt_dlen); /* router alert option data */ PACK_STRUCT_FIELD(u16_t _ra_opt_data); /* PadN option type */ PACK_STRUCT_FIELD(u8_t _padn_opt_type); /* PadN option data len */ PACK_STRUCT_FIELD(u8_t _padn_opt_dlen); } PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif /* Fragment header. */ #define IP6_FRAG_HLEN 8 #define IP6_FRAG_OFFSET_MASK 0xfff8 #define IP6_FRAG_MORE_FLAG 0x0001 #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN struct ip6_frag_hdr { /* next header */ PACK_STRUCT_FIELD(u8_t _nexth); /* reserved */ PACK_STRUCT_FIELD(u8_t reserved); /* fragment offset */ PACK_STRUCT_FIELD(u16_t _fragment_offset); /* fragmented packet identification */ PACK_STRUCT_FIELD(u32_t _identification); } PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif #define IP6H_V(hdr) ((ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f) #define IP6H_TC(hdr) ((ntohl((hdr)->_v_tc_fl) >> 20) & 0xff) #define IP6H_FL(hdr) (ntohl((hdr)->_v_tc_fl) & 0x000fffff) #define IP6H_PLEN(hdr) (ntohs((hdr)->_plen)) #define IP6H_NEXTH(hdr) ((hdr)->_nexth) #define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6) #define IP6H_HOPLIM(hdr) ((hdr)->_hoplim) #define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (htonl(((v) << 28) | ((tc) << 20) | (fl))) #define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = htons(plen) #define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth) #define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl) #define ip6_init() /* TODO should we init current addresses and header pointer? */ struct netif *ip6_route(struct ip6_addr *src, struct ip6_addr *dest); ip6_addr_t *ip6_select_source_address(struct netif *netif, ip6_addr_t * dest); err_t ip6_input(struct pbuf *p, struct netif *inp); err_t ip6_output(struct pbuf *p, struct ip6_addr *src, struct ip6_addr *dest, u8_t hl, u8_t tc, u8_t nexth); err_t ip6_output_if(struct pbuf *p, struct ip6_addr *src, struct ip6_addr *dest, u8_t hl, u8_t tc, u8_t nexth, struct netif *netif); #if LWIP_NETIF_HWADDRHINT err_t ip6_output_hinted(struct pbuf *p, ip6_addr_t *src, ip6_addr_t *dest, u8_t hl, u8_t tc, u8_t nexth, u8_t *addr_hint); #endif /* LWIP_NETIF_HWADDRHINT */ #if LWIP_IPV6_MLD err_t ip6_options_add_hbh_ra(struct pbuf * p, u8_t nexth, u8_t value); #endif /* LWIP_IPV6_MLD */ #define ip6_netif_get_local_ipX(netif, dest) (((netif) != NULL) ? \ ip6_2_ipX(ip6_select_source_address(netif, dest)) : NULL) #if IP6_DEBUG void ip6_debug_print(struct pbuf *p); #else #define ip6_debug_print(p) #endif /* IP6_DEBUG */ #ifdef __cplusplus } #endif #endif /* LWIP_IPV6 */ #endif /* __LWIP_IP6_H__ */