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WebSVN – planix.SVN – Blame – /os/branches/planix-v0/sys/src/cmd/ip/snoopy/aoe.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <ip.h>
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#include "dat.h"
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#include "protos.h"
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typedef struct{
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	uchar	verflags;
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	uchar	error;
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	uchar	major[2];
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	uchar	minor;
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	uchar	cmd;
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	uchar	tag[4];
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}Hdr;
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enum{
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	Hsize	= 10,
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};
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enum{
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	Omajor,
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	Ominor,
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	Ocmd,
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};
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static Mux p_mux[] = {
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	{"aoeata",	0},
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	{"aoecmd",	1},
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	{"aoemask",	2},
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	{"aoerr",	3},
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	{0},
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};
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static Field p_fields[] =
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{
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	{"shelf",	Fnum,	Ominor,		"shelf", },
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	{"slot",	Fnum,	Omajor,		"slot",	},
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	{"cmd",		Fnum,	Ocmd,		"cmd",	},
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	{0}
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};
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static void
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p_compile(Filter *f)
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{
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	Mux *m;
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	if(f->op == '='){
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		compile_cmp(aoe.name, f, p_fields);
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		return;
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	}
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	for(m = p_mux; m->name; m++)
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		if(strcmp(f->s, m->name) == 0){
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			f->pr = m->pr;
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			f->ulv = m->val;
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			f->subop = Ocmd;
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			return;
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		}
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	sysfatal("unknown aoe field: %s", f->s);
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}
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static int
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p_filter(Filter *f, Msg *m)
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{
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	Hdr *h;
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	if(m->pe - m->ps < Hsize)
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		return 0;
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	h = (Hdr*)m->ps;
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	m->ps += Hsize;
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	switch(f->subop){
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	case Omajor:
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		return NetS(h->major) == f->ulv;
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	case Ominor:
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		return h->minor == f->ulv;
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	case Ocmd:
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		return h->cmd == f->ulv;
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	}
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	return 0;
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}
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static int
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p_seprint(Msg *m)
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{
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	Hdr *h;
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	if(m->pe - m->ps < Hsize)
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		return 0;
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	h = (Hdr*)m->ps;
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	m->ps += Hsize;
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	demux(p_mux, h->cmd, h->cmd, m, &dump);
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	m->p = seprint(m->p, m->e, "ver=%d flag=%4b err=%d %d.%d cmd=%ux tag=%ux",
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		h->verflags >> 4, h->verflags & 0xf, h->error, NetS(h->major),
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		h->minor, h->cmd, NetL(h->tag));
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	return 0;
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}
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Proto aoe =
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{
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	"aoe",
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	p_compile,
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	p_filter,
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	p_seprint,
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	p_mux,
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	"%lud",
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	p_fields,
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	defaultframer,
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};