ng_ip_input.c revision 139823
184053Sbrooks/* 284053Sbrooks * ng_ip_input.c 3139823Simp */ 4139823Simp 5139823Simp/*- 684053Sbrooks * Copyright 2001 The Aerospace Corporation. All rights reserved. 784053Sbrooks * 884053Sbrooks * Redistribution and use in source and binary forms, with or without 984053Sbrooks * modification, are permitted provided that the following conditions 1084053Sbrooks * are met: 1184053Sbrooks * 1284053Sbrooks * 1. Redistributions of source code must retain the above copyright 1384053Sbrooks * notice, this list of conditions, and the following disclaimer. 1484053Sbrooks * 2. Redistributions in binary form must reproduce the above copyright 1584053Sbrooks * notice, this list of conditions, and the following disclaimer in the 1684053Sbrooks * documentation and/or other materials provided with the distribution. 1784053Sbrooks * 3. The name of The Aerospace Corporation may not be used to endorse or 1884053Sbrooks * promote products derived from this software. 1984053Sbrooks * 2084053Sbrooks * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND 2184053Sbrooks * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2284053Sbrooks * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2384053Sbrooks * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE 2484053Sbrooks * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2584053Sbrooks * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2684053Sbrooks * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2784053Sbrooks * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2884053Sbrooks * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2984053Sbrooks * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3084053Sbrooks * SUCH DAMAGE. 3184053Sbrooks * 3284053Sbrooks * Copyright (c) 1996-1999 Whistle Communications, Inc. 3384053Sbrooks * All rights reserved. 3484053Sbrooks * 3584053Sbrooks * Subject to the following obligations and disclaimer of warranty, use and 3684053Sbrooks * redistribution of this software, in source or object code forms, with or 3784053Sbrooks * without modifications are expressly permitted by Whistle Communications; 3884053Sbrooks * provided, however, that: 3984053Sbrooks * 1. Any and all reproductions of the source or object code must include the 4084053Sbrooks * copyright notice above and the following disclaimer of warranties; and 4184053Sbrooks * 2. No rights are granted, in any manner or form, to use Whistle 4284053Sbrooks * Communications, Inc. trademarks, including the mark "WHISTLE 4384053Sbrooks * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 4484053Sbrooks * such appears in the above copyright notice or in the software. 4584053Sbrooks * 4684053Sbrooks * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 4784053Sbrooks * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 4884053Sbrooks * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 4984053Sbrooks * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 5084053Sbrooks * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 5184053Sbrooks * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 5284053Sbrooks * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 5384053Sbrooks * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 5484053Sbrooks * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 5584053Sbrooks * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 5684053Sbrooks * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 5784053Sbrooks * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 5884053Sbrooks * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 5984053Sbrooks * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 6084053Sbrooks * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 6184053Sbrooks * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 6284053Sbrooks * OF SUCH DAMAGE. 6384053Sbrooks * 6484053Sbrooks * Author: Brooks Davis <brooks@FreeBSD.org> 6584053Sbrooks * Derived from: ng_hole.c 6684053Sbrooks * 6784053Sbrooks * $FreeBSD: head/sys/netgraph/ng_ip_input.c 139823 2005-01-07 01:45:51Z imp $ 6884053Sbrooks */ 6984053Sbrooks 7084053Sbrooks/* 7184053Sbrooks * This node simply takes IP packets and calls ip_input on them 7284053Sbrooks */ 7384053Sbrooks 7484053Sbrooks#include <sys/param.h> 7584053Sbrooks#include <sys/systm.h> 7684053Sbrooks#include <sys/kernel.h> 7784053Sbrooks#include <sys/malloc.h> 7884053Sbrooks#include <sys/mbuf.h> 7984053Sbrooks#include <sys/socket.h> 8084053Sbrooks#include <net/if.h> 8184053Sbrooks#include <net/if_types.h> 8284053Sbrooks#include <net/if_var.h> 8384053Sbrooks#include <netinet/in.h> 8484053Sbrooks#include <netinet/in_var.h> 8584053Sbrooks#include <net/netisr.h> 8684053Sbrooks#include <netgraph/ng_message.h> 8784053Sbrooks#include <netgraph/netgraph.h> 8884053Sbrooks#include <netgraph/ng_ip_input.h> 8984053Sbrooks 9084053Sbrooks/* Netgraph methods */ 9184053Sbrooksstatic ng_constructor_t ngipi_cons; 9284053Sbrooksstatic ng_rcvdata_t ngipi_rcvdata; 9384053Sbrooksstatic ng_disconnect_t ngipi_disconnect; 9484053Sbrooks 9584053Sbrooksstatic struct ng_type typestruct = { 96129823Sjulian .version = NG_ABI_VERSION, 97129823Sjulian .name = NG_IP_INPUT_NODE_TYPE, 98129823Sjulian .constructor = ngipi_cons, 99129823Sjulian .rcvdata = ngipi_rcvdata, 100129823Sjulian .disconnect = ngipi_disconnect, 10184053Sbrooks}; 10284053SbrooksNETGRAPH_INIT(ip_input, &typestruct); 10384053Sbrooks 10484053Sbrooks/* 10584053Sbrooks * Be obliging. but no work to do. 10684053Sbrooks */ 10784053Sbrooksstatic int 10884053Sbrooksngipi_cons(node_p node) 10984053Sbrooks{ 11084053Sbrooks return(0); 11184053Sbrooks} 11284053Sbrooks 11384053Sbrooks/* 11484053Sbrooks * Receive data 11584053Sbrooks */ 11684053Sbrooksstatic int 11784053Sbrooksngipi_rcvdata(hook_p hook, item_p item) 11884053Sbrooks{ 11984053Sbrooks struct mbuf *m; 12084053Sbrooks 12184053Sbrooks NGI_GET_M(item, m); 12284053Sbrooks NG_FREE_ITEM(item); 123111888Sjlemon netisr_dispatch(NETISR_IP, m); 12484053Sbrooks return 0; 12584053Sbrooks} 12684053Sbrooks 12784053Sbrooks/* 12884053Sbrooks * Hook disconnection 12984053Sbrooks */ 13084053Sbrooksstatic int 13184053Sbrooksngipi_disconnect(hook_p hook) 13284053Sbrooks{ 13384053Sbrooks if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 13484053Sbrooks ng_rmnode_self(NG_HOOK_NODE(hook)); 13584053Sbrooks return (0); 13684053Sbrooks} 137