84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/* ICMP for IP v4 and v6 */
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enum
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{
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/* Packet Types, icmp v4 (rfc 792) */
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EchoReply = 0,
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Unreachable = 3,
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SrcQuench = 4,
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Redirect = 5,
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EchoRequest = 8,
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TimeExceed = 11,
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InParmProblem = 12,
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Timestamp = 13,
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TimestampReply = 14,
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InfoRequest = 15,
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InfoReply = 16,
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AddrMaskRequest = 17,
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AddrMaskReply = 18,
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Traceroute = 30,
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IPv6WhereAreYou = 33,
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IPv6IAmHere = 34,
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/* packet types, icmp v6 (rfc 2463) */
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/* error messages */
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UnreachableV6 = 1,
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PacketTooBigV6 = 2,
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TimeExceedV6 = 3,
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ParamProblemV6 = 4,
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/* informational messages (rfc 2461 also) */
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EchoRequestV6 = 128,
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EchoReplyV6 = 129,
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RouterSolicit = 133,
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RouterAdvert = 134,
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NbrSolicit = 135,
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NbrAdvert = 136,
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RedirectV6 = 137,
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Maxtype6 = 137,
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ICMP_HDRSIZE = 8,
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};
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typedef struct Ip4hdr Ip4hdr;
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struct Ip4hdr
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{
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unsigned char vihl; /* Version and header length */
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unsigned char tos; /* Type of service */
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unsigned char length[2]; /* packet length */
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unsigned char id[2]; /* Identification */
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unsigned char frag[2]; /* Fragment information */
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unsigned char ttl; /* Time to live */
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unsigned char proto; /* Protocol */
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unsigned char ipcksum[2]; /* Header checksum */
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unsigned char src[4]; /* Ipv4 source */
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unsigned char dst[4]; /* Ipv4 destination */
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unsigned char data[];
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};
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// #define IP4HDRSZ offsetof(Ip4hdr, data[0])
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/* the icmp payload has the same format in v4 and v6 */
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typedef struct Icmphdr Icmphdr;
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struct Icmphdr {
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unsigned char type;
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unsigned char code;
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unsigned char cksum[2];
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unsigned char icmpid[2];
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unsigned char seq[2];
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unsigned char data[];
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};
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// #define ICMPHDRSZ offsetof(Icmphdr, data[0])
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