/* * Copyright (c) 2013 * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. */ #ifndef SLIRP_IP6_ICMP_H #define SLIRP_IP6_ICMP_H /* * Interface Control Message Protocol version 6 Definitions. * Per RFC 4443, March 2006. * * Network Discover Protocol Definitions. * Per RFC 4861, September 2007. */ struct icmp6_echo { /* Echo Messages */ uint16_t id; uint16_t seq_num; }; union icmp6_error_body { uint32_t unused; uint32_t pointer; uint32_t mtu; }; /* * NDP Messages */ struct ndp_rs { /* Router Solicitation Message */ uint32_t reserved; }; struct ndp_ra { /* Router Advertisement Message */ uint8_t chl; /* Cur Hop Limit */ #ifdef HOST_WORDS_BIGENDIAN uint8_t M:1, O:1, reserved:6; #else uint8_t reserved:6, O:1, M:1; #endif uint16_t lifetime; /* Router Lifetime */ uint32_t reach_time; /* Reachable Time */ uint32_t retrans_time; /* Retrans Timer */ } QEMU_PACKED; struct ndp_ns { /* Neighbor Solicitation Message */ uint32_t reserved; struct in6_addr target; /* Target Address */ } QEMU_PACKED; struct ndp_na { /* Neighbor Advertisement Message */ #ifdef HOST_WORDS_BIGENDIAN uint32_t R:1, /* Router Flag */ S:1, /* Solicited Flag */ O:1, /* Override Flag */ reserved_hi:5, reserved_lo:24; #else uint32_t reserved_hi:5, O:1, S:1, R:1, reserved_lo:24; #endif struct in6_addr target; /* Target Address */ } QEMU_PACKED; struct ndp_redirect { uint32_t reserved; struct in6_addr target; /* Target Address */ struct in6_addr dest; /* Destination Address */ } QEMU_PACKED; /* * Structure of an icmpv6 header. */ struct icmp6 { uint8_t icmp6_type; /* type of message, see below */ uint8_t icmp6_code; /* type sub code */ uint16_t icmp6_cksum; /* ones complement cksum of struct */ union { union icmp6_error_body error_body; struct icmp6_echo echo; struct ndp_rs ndp_rs; struct ndp_ra ndp_ra; struct ndp_ns ndp_ns; struct ndp_na ndp_na; struct ndp_redirect ndp_redirect; } icmp6_body; #define icmp6_err icmp6_body.error_body #define icmp6_echo icmp6_body.echo #define icmp6_nrs icmp6_body.ndp_rs #define icmp6_nra icmp6_body.ndp_ra #define icmp6_nns icmp6_body.ndp_ns #define icmp6_nna icmp6_body.ndp_na #define icmp6_redirect icmp6_body.ndp_redirect } QEMU_PACKED; #define ICMP6_MINLEN 4 #define ICMP6_ERROR_MINLEN 8 #define ICMP6_ECHO_MINLEN 8 #define ICMP6_NDP_RS_MINLEN 8 #define ICMP6_NDP_RA_MINLEN 16 #define ICMP6_NDP_NS_MINLEN 24 #define ICMP6_NDP_NA_MINLEN 24 #define ICMP6_NDP_REDIRECT_MINLEN 40 /* * NDP Options */ struct ndpopt { uint8_t ndpopt_type; /* Option type */ uint8_t ndpopt_len; /* /!\ In units of 8 octets */ union { unsigned char linklayer_addr[6]; /* Source/Target Link-layer */ #define ndpopt_linklayer ndpopt_body.linklayer_addr struct prefixinfo { /* Prefix Information */ uint8_t prefix_length; #ifdef HOST_WORDS_BIGENDIAN uint8_t L:1, A:1, reserved1:6; #else uint8_t reserved1:6, A:1, L:1; #endif uint32_t valid_lt; /* Valid Lifetime */ uint32_t pref_lt; /* Preferred Lifetime */ uint32_t reserved2; struct in6_addr prefix; } QEMU_PACKED prefixinfo; #define ndpopt_prefixinfo ndpopt_body.prefixinfo struct rdnss { uint16_t reserved; uint32_t lifetime; struct in6_addr addr; } QEMU_PACKED rdnss; #define ndpopt_rdnss ndpopt_body.rdnss } ndpopt_body; } QEMU_PACKED; /* NDP options type */ #define NDPOPT_LINKLAYER_SOURCE 1 /* Source Link-Layer Address */ #define NDPOPT_LINKLAYER_TARGET 2 /* Target Link-Layer Address */ #define NDPOPT_PREFIX_INFO 3 /* Prefix Information */ #define NDPOPT_RDNSS 25 /* Recursive DNS Server Address */ /* NDP options size, in octets. */ #define NDPOPT_LINKLAYER_LEN 8 #define NDPOPT_PREFIXINFO_LEN 32 #define NDPOPT_RDNSS_LEN 24 /* * Definition of type and code field values. * Per https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xml * Last Updated 2012-11-12 */ /* Errors */ #define ICMP6_UNREACH 1 /* Destination Unreachable */ #define ICMP6_UNREACH_NO_ROUTE 0 /* no route to dest */ #define ICMP6_UNREACH_DEST_PROHIB 1 /* com with dest prohibited */ #define ICMP6_UNREACH_SCOPE 2 /* beyond scope of src addr */ #define ICMP6_UNREACH_ADDRESS 3 /* address unreachable */ #define ICMP6_UNREACH_PORT 4 /* port unreachable */ #define ICMP6_UNREACH_SRC_FAIL 5 /* src addr failed */ #define ICMP6_UNREACH_REJECT_ROUTE 6 /* reject route to dest */ #define ICMP6_UNREACH_SRC_HDR_ERROR 7 /* error in src routing header */ #define ICMP6_TOOBIG 2 /* Packet Too Big */ #define ICMP6_TIMXCEED 3 /* Time Exceeded */ #define ICMP6_TIMXCEED_INTRANS 0 /* hop limit exceeded in transit */ #define ICMP6_TIMXCEED_REASS 1 /* ttl=0 in reass */ #define ICMP6_PARAMPROB 4 /* Parameter Problem */ #define ICMP6_PARAMPROB_HDR_FIELD 0 /* err header field */ #define ICMP6_PARAMPROB_NXTHDR_TYPE 1 /* unrecognized Next Header type */ #define ICMP6_PARAMPROB_IPV6_OPT 2 /* unrecognized IPv6 option */ /* Informational Messages */ #define ICMP6_ECHO_REQUEST 128 /* Echo Request */ #define ICMP6_ECHO_REPLY 129 /* Echo Reply */ #define ICMP6_NDP_RS 133 /* Router Solicitation (NDP) */ #define ICMP6_NDP_RA 134 /* Router Advertisement (NDP) */ #define ICMP6_NDP_NS 135 /* Neighbor Solicitation (NDP) */ #define ICMP6_NDP_NA 136 /* Neighbor Advertisement (NDP) */ #define ICMP6_NDP_REDIRECT 137 /* Redirect Message (NDP) */ /* * Router Configuration Variables (rfc4861#section-6) */ #define NDP_IsRouter 1 #define NDP_AdvSendAdvertisements 1 #define NDP_MaxRtrAdvInterval 600000 #define NDP_MinRtrAdvInterval ((NDP_MaxRtrAdvInterval >= 9) ? \ NDP_MaxRtrAdvInterval / 3 : \ NDP_MaxRtrAdvInterval) #define NDP_AdvManagedFlag 0 #define NDP_AdvOtherConfigFlag 0 #define NDP_AdvLinkMTU 0 #define NDP_AdvReachableTime 0 #define NDP_AdvRetransTime 0 #define NDP_AdvCurHopLimit 64 #define NDP_AdvDefaultLifetime ((3 * NDP_MaxRtrAdvInterval) / 1000) #define NDP_AdvValidLifetime 86400 #define NDP_AdvOnLinkFlag 1 #define NDP_AdvPrefLifetime 14400 #define NDP_AdvAutonomousFlag 1 void icmp6_init(Slirp *slirp); void icmp6_cleanup(Slirp *slirp); void icmp6_input(struct mbuf *); void icmp6_send_error(struct mbuf *m, uint8_t type, uint8_t code); void ndp_send_ra(Slirp *slirp); void ndp_send_ns(Slirp *slirp, struct in6_addr addr); #endif