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- /*
- * Internet Protocol Version 6
- *
- * rfc2460 defines the protocol, rfc2461 neighbour discovery, and
- * rfc2462 address autoconfiguration. rfc4443 defines ICMP; was rfc2463.
- * rfc4291 defines the address architecture (including prefices), was rfc3513.
- * rfc4007 defines the scoped address architecture.
- *
- * global unicast is anything but unspecified (::), loopback (::1),
- * multicast (ff00::/8), and link-local unicast (fe80::/10).
- *
- * site-local (fec0::/10) is now deprecated, originally by rfc3879.
- *
- * Unique Local IPv6 Unicast Addresses are defined by rfc4193.
- * prefix is fc00::/7, scope is global, routing is limited to roughly a site.
- */
- #define isv6mcast(addr) ((addr)[0] == 0xff)
- #define islinklocal(addr) ((addr)[0] == 0xfe && ((addr)[1] & 0xc0) == 0x80)
- #define optexsts(np) (nhgets((np)->ploadlen) > 24)
- #define issmcast(addr) (memcmp((addr), v6solicitednode, 13) == 0)
- #ifndef MIN
- #define MIN(a, b) ((a) <= (b)? (a): (b))
- #endif
- enum { /* Header Types */
- HBH = 0, /* hop-by-hop multicast routing protocol */
- ICMP = 1,
- IGMP = 2,
- GGP = 3,
- IPINIP = 4,
- ST = 5,
- TCP = 6,
- UDP = 17,
- ISO_TP4 = 29,
- RH = 43,
- FH = 44,
- IDRP = 45,
- RSVP = 46,
- AH = 51,
- ESP = 52,
- ICMPv6 = 58,
- NNH = 59,
- DOH = 60,
- ISO_IP = 80,
- IGRP = 88,
- OSPF = 89,
- Maxhdrtype = 256,
- };
- enum {
- /* multicast flags and scopes */
- // Well_known_flg = 0,
- // Transient_flg = 1,
- // Interface_local_scop = 1,
- Link_local_scop = 2,
- // Site_local_scop = 5,
- // Org_local_scop = 8,
- Global_scop = 14,
- /* various prefix lengths */
- SOLN_PREF_LEN = 13,
- /* icmpv6 unreachability codes */
- Icmp6_no_route = 0,
- Icmp6_ad_prohib = 1,
- Icmp6_out_src_scope = 2,
- Icmp6_adr_unreach = 3,
- Icmp6_port_unreach = 4,
- Icmp6_gress_src_fail = 5,
- Icmp6_rej_route = 6,
- Icmp6_unknown = 7, /* our own invention for internal use */
- /* various flags & constants */
- v6MINTU = 1280,
- HOP_LIMIT = 255,
- ETHERHDR_LEN = 14,
- IPV6HDR_LEN = 40,
- IPV4HDR_LEN = 20,
- /* option types */
- SRC_LLADDR = 1,
- TARGET_LLADDR = 2,
- PREFIX_INFO = 3,
- REDIR_HEADER = 4,
- MTU_OPTION = 5,
- SRC_UNSPEC = 0,
- SRC_UNI = 1,
- TARG_UNI = 2,
- TARG_MULTI = 3,
- Tunitent = 1,
- Tuniproxy = 2,
- Tunirany = 3,
- /* Router constants (all times in milliseconds) */
- MAX_INIT_RTR_ADVERT_INTVL = 16000,
- MAX_INIT_RTR_ADVERTS = 3,
- MAX_FINAL_RTR_ADVERTS = 3,
- MIN_DELAY_BETWEEN_RAS = 3000,
- MAX_RA_DELAY_TIME = 500,
- /* Host constants */
- MAX_RTR_SOLICIT_DELAY = 1000,
- RTR_SOLICIT_INTVL = 4000,
- MAX_RTR_SOLICITS = 3,
- /* Node constants */
- MAX_MULTICAST_SOLICIT = 3,
- MAX_UNICAST_SOLICIT = 3,
- MAX_ANYCAST_DELAY_TIME = 1000,
- MAX_NEIGHBOR_ADVERT = 3,
- REACHABLE_TIME = 30000,
- RETRANS_TIMER = 1000,
- DELAY_FIRST_PROBE_TIME = 5000,
- };
- typedef struct Ip6hdr Ip6hdr;
- typedef struct Opthdr Opthdr;
- typedef struct Routinghdr Routinghdr;
- typedef struct Fraghdr6 Fraghdr6;
- struct Ip6hdr {
- uchar vcf[4]; /* version:4, traffic class:8, flow label:20 */
- uchar ploadlen[2]; /* payload length: packet length - 40 */
- uchar proto; /* next header type */
- uchar ttl; /* hop limit */
- uchar src[IPaddrlen];
- uchar dst[IPaddrlen];
- };
- struct Opthdr {
- uchar nexthdr;
- uchar len;
- };
- struct Routinghdr {
- uchar nexthdr;
- uchar len;
- uchar rtetype;
- uchar segrem;
- };
- struct Fraghdr6 {
- uchar nexthdr;
- uchar res;
- uchar offsetRM[2]; /* Offset, Res, M flag */
- uchar id[4];
- };
- extern uchar v6allnodesN[IPaddrlen];
- extern uchar v6allnodesL[IPaddrlen];
- extern uchar v6allroutersN[IPaddrlen];
- extern uchar v6allroutersL[IPaddrlen];
- extern uchar v6allnodesNmask[IPaddrlen];
- extern uchar v6allnodesLmask[IPaddrlen];
- extern uchar v6allroutersS[IPaddrlen];
- extern uchar v6solicitednode[IPaddrlen];
- extern uchar v6solicitednodemask[IPaddrlen];
- extern uchar v6Unspecified[IPaddrlen];
- extern uchar v6loopback[IPaddrlen];
- extern uchar v6loopbackmask[IPaddrlen];
- extern uchar v6linklocal[IPaddrlen];
- extern uchar v6linklocalmask[IPaddrlen];
- extern uchar v6glunicast[IPaddrlen];
- extern uchar v6multicast[IPaddrlen];
- extern uchar v6multicastmask[IPaddrlen];
- extern int v6llpreflen;
- extern int v6lbpreflen;
- extern int v6mcpreflen;
- extern int v6snpreflen;
- extern int v6aNpreflen;
- extern int v6aLpreflen;
- extern int ReTransTimer;
- void ipv62smcast(uchar *, uchar *);
- void icmpns(Fs *f, uchar* src, int suni, uchar* targ, int tuni, uchar* mac);
- void icmpna(Fs *f, uchar* src, uchar* dst, uchar* targ, uchar* mac, uchar flags);
- void icmpttlexceeded6(Fs *f, Ipifc *ifc, Block *bp);
- void icmppkttoobig6(Fs *f, Ipifc *ifc, Block *bp);
- void icmphostunr(Fs *f, Ipifc *ifc, Block *bp, int code, int free);
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