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WebSVN – planix.SVN – Blame – /os/branches/feature-vt/sys/src/cmd/ip/snoopy/aoemask.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	res;
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	uchar	cmd;
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	uchar	err;
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	uchar	cnt;
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} Hdr;
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enum {
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	Ocmd,
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	Oerr,
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	Ocnt,
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	Hsize	= 4,
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};
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static Field p_fields[] =
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{
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	{ "cmd",	Fnum,	Ocmd,	"command", },
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	{ "err",	Fnum,	Oerr,	"error", },
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	{ "cnt",	Fnum,	Ocnt,	"count", },
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	nil
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};
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static Mux p_mux[] = {
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	{ "aoemd",	0 },
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	{ "aoemd",	1 },
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	nil
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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(aoerr.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 aoemask 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 Ocmd:
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		return h->cmd == f->ulv;
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	case Oerr:
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		return h->err == f->ulv;
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	case Ocnt:
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		return h->cnt == f->ulv;
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	}
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	return 0;
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}
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static char *ctab[] = {
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	"read",
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	"edit",
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};
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static char *etab[] = {
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	"",
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	"bad",
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	"full",
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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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	char *s, *t;
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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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	s = "unk";
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	if(h->cmd < nelem(ctab))
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		s = ctab[h->cmd];
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	t = "unk";
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	if(h->err < nelem(etab))
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		s = etab[h->err];
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	m->p = seprint(m->p, m->e, "cmd=%d %s err=%d %s cnt=%d\n",
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		h->cmd, s, h->err, t, h->cnt);
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	return 0;
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}
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Proto aoemask = {
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	"aoemask",
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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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};