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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
	7	*
	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1997-1998 Apple Computer, Inc.
	27	* All Rights Reserved.
	28	*/
	29
	30	/*
	31	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	32	*/
	33	#include <sys/errno.h>
	34	#include <sys/types.h>
	35	#include <sys/param.h>
	36	#include <machine/spl.h>
	37	#include <sys/systm.h>
	38	#include <sys/kernel.h>
	39	#include <sys/proc.h>
	40	#include <sys/filedesc.h>
	41	#include <sys/fcntl.h>
	42	#include <sys/mbuf.h>
	43	#include <sys/socket.h>
	44	#include <sys/socketvar.h>
	45
	46	#include <net/if.h>
	47
	48	#include <netat/sysglue.h>
	49	#include <netat/appletalk.h>
	50	#include <netat/ep.h>
	51	#include <netat/ddp.h>
	52	#include <netat/debug.h>
	53	#include <netat/at_snmp.h>
	54	#include <netat/at_pcb.h>
	55	#include <netat/at_var.h>
	56
	57	extern snmpStats_t snmpStats;
	58
	59	/****************************************************************/
	60	/* */
	61	/* */
	62	/* Echo Protocol */
	63	/* */
	64	/* */
	65	/****************************************************************/
	66
	67	void ep_input (mp, ifID)
	68	gbuf_t *mp;
	69	register at_ifaddr_t *ifID;
	70	{
	71	register at_ddp_t *ddp;
	72
	73	snmpStats.ec_echoReq++;
	74	ddp = (at_ddp_t *)gbuf_rptr(mp);
	75
	76	/* ep packets that have a source broadcast can cause
	77	* possible broadcast storms, prevent that here
	78	*/
	79	if ( NET_VALUE(ddp->src_net) == 0 \|\| ddp->src_node == 255) {
	80	gbuf_freem(mp);
	81	return;
	82	}
	83
	84	/*
	85	* Check if this AEP message is for us or need to be forwarded
	86	*/
	87	if (!ROUTING_MODE \|\|
	88	(ifID->ifThisNode.s_net == NET_VALUE(ddp->dst_net))
	89	&& (ifID->ifThisNode.s_node == ddp->dst_node)) {
	90
	91	dPrintf(D_M_AEP, D_L_INFO, ("aep_input: received for this port from %d:%d\n",
	92	NET_VALUE(ddp->src_net), ddp->src_node));
	93
	94	if (ddp->type == DDP_ECHO &&
	95	ddp->data[0] == EP_REQUEST) {
	96	ddp->data[0] = EP_REPLY;
	97	NET_NET(ddp->dst_net, ddp->src_net);
	98	ddp->dst_node = ddp->src_node;
	99	ddp->dst_socket = ddp->src_socket;
	100	/* send the packet out.... */
	101	snmpStats.ec_echoReply++;
	102	(void)ddp_output(&mp, (at_socket)EP_SOCKET, FALSE);
	103	} else
	104	gbuf_freem(mp);
	105	}
	106	else {
	107	dPrintf(D_M_AEP, D_L_INFO,
	108	("aep_input: calling routing needed from %d:%d to %d:%d\n",
	109	NET_VALUE(ddp->src_net), ddp->src_node, NET_VALUE(ddp->dst_net),
	110	ddp->dst_node));
	111	routing_needed(mp, ifID, TRUE);
	112	}
	113
	114	return;
	115	}