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WebSVN – planix.SVN – Blame – /os/branches/feature_fixcpp/sys/src/cmd/ip/icmp.h – Rev 2

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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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	uchar	vihl;		/* Version and header length */
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	uchar	tos;		/* Type of service */
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	uchar	length[2];	/* packet length */
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	uchar	id[2];		/* Identification */
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	uchar	frag[2];	/* Fragment information */
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	uchar	ttl;		/* Time to live */
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	uchar	proto;		/* Protocol */
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	uchar	ipcksum[2];	/* Header checksum */
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	uchar	src[4];		/* Ipv4 source */
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	uchar	dst[4];		/* Ipv4 destination */
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	uchar	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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	uchar	type;
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	uchar	code;
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	uchar	cksum[2];
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	uchar	icmpid[2];
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	uchar	seq[2];
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	uchar	data[];
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};
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// #define ICMPHDRSZ offsetof(Icmphdr, data[0])