/* Copyright © Coraid, Inc. 2006.  All rights reserved. */#include <u.h>#include <libc.h>#include "cec.h" int	fd = -1;int	cfd = -1;int	efd = -1; intnetopen0(char *e){	char buf[128], ctl[13];	int n; 	snprint(buf, sizeof buf, "%s/clone", e);	if((efd = open(buf, ORDWR)) == -1)		return -1;	memset(ctl, 0, sizeof ctl);	if(read(efd, ctl, sizeof ctl) < 0)		return -1;	n = atoi(ctl);	snprint(buf, sizeof buf, "connect %d", Etype);	if(write(efd, buf, strlen(buf)) != strlen(buf))		return -1;	snprint(buf, sizeof buf, "%s/%d/ctl", e, n);	if((cfd = open(buf, ORDWR)) < 0)		return -1;	snprint(buf, sizeof buf, "nonblocking");	if(write(cfd, buf, strlen(buf)) != strlen(buf))		return -1;	snprint(buf, sizeof buf, "%s/%d/data", e, n);	fd = open(buf, ORDWR);	return fd;} voidnetclose(void){	close(efd);	close(cfd);	close(fd);	efd = -1;	cfd = -1;	fd = -1;} intnetopen(char *e){	int r; 	if((r = netopen0(e)) >= 0)		return r;	perror("netopen");	netclose();	return -1;} /* what if len < netlen? */intnetget(void *v, int len){	int l; 	l = read(fd, v, len);	if(debug && l > 0){		fprint(2, "read %d bytes\n", l);		dump((uchar*)v, l);	}	if (l <= 0)		return 0;	return l;} intnetsend(void *v, int len){	uchar *p; 	p = v;	if (debug) {		fprint(2, "sending %d bytes\n", len);		dump(p, len);	}	if (len < 60)		len = 60;	/* mintu */	return write(fd, p, len);}