| /* |
| * 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 |
