if_faith.c revision 54263
154263Sshin/* 254263Sshin * Copyright (c) 1982, 1986, 1993 354263Sshin * The Regents of the University of California. All rights reserved. 454263Sshin * 554263Sshin * Redistribution and use in source and binary forms, with or without 654263Sshin * modification, are permitted provided that the following conditions 754263Sshin * are met: 854263Sshin * 1. Redistributions of source code must retain the above copyright 954263Sshin * notice, this list of conditions and the following disclaimer. 1054263Sshin * 2. Redistributions in binary form must reproduce the above copyright 1154263Sshin * notice, this list of conditions and the following disclaimer in the 1254263Sshin * documentation and/or other materials provided with the distribution. 1354263Sshin * 3. All advertising materials mentioning features or use of this software 1454263Sshin * must display the following acknowledgement: 1554263Sshin * This product includes software developed by the University of 1654263Sshin * California, Berkeley and its contributors. 1754263Sshin * 4. Neither the name of the University nor the names of its contributors 1854263Sshin * may be used to endorse or promote products derived from this software 1954263Sshin * without specific prior written permission. 2054263Sshin * 2154263Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2254263Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2354263Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2454263Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2554263Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2654263Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2754263Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2854263Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2954263Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3054263Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3154263Sshin * SUCH DAMAGE. 3254263Sshin * 3354263Sshin * $FreeBSD: head/sys/net/if_faith.c 54263 1999-12-07 17:39:16Z shin $ 3454263Sshin */ 3554263Sshin/* 3654263Sshin * derived from 3754263Sshin * @(#)if_loop.c 8.1 (Berkeley) 6/10/93 3854263Sshin * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp 3954263Sshin */ 4054263Sshin 4154263Sshin/* 4254263Sshin * Loopback interface driver for protocol testing and timing. 4354263Sshin */ 4454263Sshin 4554263Sshin#include "faith.h" 4654263Sshin#if NFAITH > 0 4754263Sshin 4854263Sshin#include <sys/param.h> 4954263Sshin#include <sys/systm.h> 5054263Sshin#include <sys/kernel.h> 5154263Sshin#include <sys/mbuf.h> 5254263Sshin#include <sys/socket.h> 5354263Sshin#include <sys/sockio.h> 5454263Sshin 5554263Sshin#include <net/if.h> 5654263Sshin#include <net/if_types.h> 5754263Sshin#include <net/netisr.h> 5854263Sshin#include <net/route.h> 5954263Sshin#include <net/bpf.h> 6054263Sshin 6154263Sshinextern int loioctl __P((struct ifnet *, u_long, caddr_t)); 6254263Sshinextern int looutput __P((struct ifnet *ifp, 6354263Sshin struct mbuf *m, struct sockaddr *dst, struct rtentry *rt)); 6454263Sshin 6554263Sshinvoid faithattach __P((void *)); 6654263SshinPSEUDO_SET(faithattach, if_faith); 6754263Sshinstatic struct ifnet faithif[NFAITH]; 6854263Sshin 6954263Sshin#define FAITHMTU 1500 7054263Sshin 7154263Sshin/* ARGSUSED */ 7254263Sshinvoid 7354263Sshinfaithattach(faith) 7454263Sshin void *faith; 7554263Sshin{ 7654263Sshin register struct ifnet *ifp; 7754263Sshin register int i; 7854263Sshin 7954263Sshin for (i = 0; i < NFAITH; i++) { 8054263Sshin ifp = &faithif[i]; 8154263Sshin bzero(ifp, sizeof(faithif[i])); 8254263Sshin ifp->if_name = "faith"; 8354263Sshin ifp->if_unit = i; 8454263Sshin ifp->if_mtu = FAITHMTU; 8554263Sshin /* Change to BROADCAST experimentaly to announce its prefix. */ 8654263Sshin ifp->if_flags = /* IFF_LOOPBACK */ IFF_BROADCAST | IFF_MULTICAST; 8754263Sshin ifp->if_ioctl = loioctl; 8854263Sshin ifp->if_output = looutput; 8954263Sshin ifp->if_type = IFT_FAITH; 9054263Sshin ifp->if_snd.ifq_maxlen = ifqmaxlen; 9154263Sshin ifp->if_hdrlen = 0; 9254263Sshin ifp->if_addrlen = 0; 9354263Sshin if_attach(ifp); 9454263Sshin bpfattach(ifp, DLT_NULL, sizeof(u_int)); 9554263Sshin } 9654263Sshin} 9754263Sshin#endif /* NFAITH > 0 */ 98