/*  * 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. */ #include <u.h>#include <libc.h>#include <ip.h>#include "dat.h"#include "protos.h" typedef struct {	uchar	cmd;	uchar	nea;} Hdr; enum {	Ocmd,	Onea,	Oea, 	Hsize	= 2,}; static Field p_fields[] = {	{"cmd",	Fnum,	Ocmd,	"command",	},	{"nea",	Fnum,	Onea,	"ea count",	},	{"ea",	Fnum,	Onea,	"ethernet addr", },	nil}; static voidp_compile(Filter *f){	if(f->op == '='){		compile_cmp(aoerr.name, f, p_fields);		return;	}	sysfatal("unknown aoerr field: %s", f->s);} static intp_filter(Filter *f, Msg *m){	uchar buf[6];	int i;	Hdr *h; 	if(m->pe - m->ps < Hsize)		return 0; 	h = (Hdr*)m->ps;	m->ps += Hsize; 	switch(f->subop){	case Ocmd:		return h->cmd == f->ulv;	case Onea:		return h->nea == f->ulv;	case Oea:		if(m->pe - m->ps < 6*h->nea)			return 0;		for(i = 0; i < 6; i++)			buf[i] = f->ulv >> ((5 - i)*8);		for(i = 0; i < h->nea; i++)			if(memcmp(m->ps + 6*i, buf, 6) == 0)				return 1;		return 0;	}	return 0;} static char *ctab[] = {	"read",	"write",	"force",}; static intp_seprint(Msg *m){	char *s;	int i;	Hdr *h; 	if(m->pe - m->ps < Hsize)		return 0; 	h = (Hdr*)m->ps;	m->ps += Hsize; 	/* no next protocol */	m->pr = nil; 	s = "unk";	if(h->cmd < nelem(ctab))		s = ctab[h->cmd];	m->p = seprint(m->p, m->e, "cmd=%d %s nea=%d", h->cmd, s, h->nea);	for(i = 0;; i++){		if(h->nea < i)			break;		if(i == 3){			m->p = seprint(m->p, m->e, " ...");			break;		}		if(m->pe - m->ps < 6*i){			m->p = seprint(m->p, m->e, " *short*");			break;		}		m->p = seprint(m->p, m->e, " %E", m->pe + 6*i);	}	m->p = seprint(m->p, m->e, "\n");	return 0;} Proto aoerr = {	"aoerr",	p_compile,	p_filter,	p_seprint,	nil,	nil,	p_fields,	defaultframer,};