/*  * 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 Hdr	Hdr;struct Hdr{	uchar	sum[2];		/* Checksum including header */	uchar	len[2];		/* Packet length */	uchar	type;		/* Packet type */	uchar	spec;		/* Special */	uchar	sport[2];	/* Src port */	uchar	dport[2];	/* Dst port */	uchar	id[4];		/* Sequence id */	uchar	ack[4];		/* Acked sequence */}; enum{	ILLEN= 18,}; enum{	Os,	Od,	Osd,}; static Field p_fields[] = {	{"s",		Fnum,	Os,	"source port",	} ,	{"d",		Fnum,	Od,	"dest port",	} ,	{"a",		Fnum,	Osd,	"source/dest port",	} ,	{"sd",		Fnum,	Osd,	"source/dest port",	} ,	{0}}; static Mux p_mux[] ={	{"ninep",	17007, },	/* exportfs */	{"ninep",	17008, },	/* 9fs */	{"ninep",	17005, },	/* ocpu */	{"ninep",	17010, },	/* ncpu */	{"ninep",	17013, },	/* cpu */	{0},}; static voidp_compile(Filter *f){	Mux *m; 	if(f->op == '='){		compile_cmp(il.name, f, p_fields);		return;	}	for(m = p_mux; m->name != nil; m++)		if(strcmp(f->s, m->name) == 0){			f->pr = m->pr;			f->ulv = m->val;			f->subop = Osd;			return;		}	sysfatal("unknown il field or protocol: %s", f->s);} static intp_filter(Filter *f, Msg *m){	Hdr *h; 	if(m->pe - m->ps < ILLEN)		return 0;	h = (Hdr*)m->ps;	m->ps += ILLEN; 	switch(f->subop){	case Os:		return NetS(h->sport) == f->ulv;	case Od:		return NetS(h->dport) == f->ulv;	case Osd:		return NetS(h->sport) == f->ulv || NetS(h->dport) == f->ulv;	}	return 0;} char *pktnames[] = {	"Sync",		"Data",	"Dataquery",	"Ack",	"Query",	"State",	"Close"}; static char*pkttype(int t){	static char b[10];		if(t > 6){		sprint(b, "%d", t);		return b;	}	return pktnames[t];} static intp_seprint(Msg *m){	Hdr *h;	int dport, sport; 	if(m->pe - m->ps < ILLEN)		return -1;	h = (Hdr*)m->ps;	m->ps += ILLEN; 	dport = NetS(h->dport);	sport = NetS(h->sport);	demux(p_mux, sport, dport, m, &dump); 	m->p = seprint(m->p, m->e, "s=%d d=%d t=%s id=%lud ack=%lud spec=%d ck=%4.4ux ln=%d",			sport, dport, pkttype(h->type),			(ulong)NetL(h->id), (ulong)NetL(h->ack),			h->spec,			NetS(h->sum), NetS(h->len));	return 0;} Proto il ={	"il",	p_compile,	p_filter,	p_seprint,	p_mux,	"%lud",	p_fields,	defaultframer,};