ref: b863253879268c658abd3e61c24cf27adc99a6c1
dir: /sys/src/9/ip/ipv6.h/
/* * 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, IP6HDR = 40, /* sizeof(Ip6hdr) = 8 + 2*16 */ /* option types */ /* neighbour discovery */ SRC_LLADDR = 1, TARGET_LLADDR = 2, PREFIX_INFO = 3, REDIR_HEADER = 4, MTU_OPTION = 5, /* new since rfc2461; see iana.org/assignments/icmpv6-parameters */ V6nd_home = 8, V6nd_srcaddrs = 9, /* rfc3122 */ V6nd_ip = 17, /* /lib/rfc/drafts/draft-jeong-dnsop-ipv6-dns-discovery-12.txt */ V6nd_rdns = 25, /* plan 9 extensions */ V6nd_9fs = 250, V6nd_9auth = 251, SRC_UNSPEC = 0, SRC_UNI = 1, TARG_UNI = 2, TARG_MULTI = 3, Tunitent = 1, Tuniproxy = 2, Tunirany = 3, /* Node constants */ MAX_MULTICAST_SOLICIT = 3, RETRANS_TIMER = 1000, }; typedef struct Ip6hdr Ip6hdr; typedef struct Opthdr Opthdr; typedef struct Routinghdr Routinghdr; typedef struct Fraghdr6 Fraghdr6; /* we do this in case there's padding at the end of Ip6hdr */ #define IPV6HDR \ 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 Ip6hdr { IPV6HDR; uchar payload[]; }; struct Opthdr { /* unused */ uchar nexthdr; uchar len; }; /* * Beware routing header type 0 (loose source routing); see * http://www.secdev.org/conf/IPv6_RH_security-csw07.pdf. * Type 1 is unused. Type 2 is for MIPv6 (mobile IPv6) filtering * against type 0 header. */ struct Routinghdr { /* unused */ 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 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 v6multicast[IPaddrlen]; extern uchar v6multicastmask[IPaddrlen]; extern int v6llpreflen; 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 icmphostunr6(Fs *f, Ipifc *ifc, Block *bp, int code, int tome);