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