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FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_ip_input.c

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    1 /*
    2  * ng_ip_input.c
    3  */
    4 
    5 /*-
    6  * Copyright 2001 The Aerospace Corporation.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  *
   12  * 1.  Redistributions of source code must retain the above copyright
   13  *     notice, this list of conditions, and the following disclaimer.
   14  * 2.  Redistributions in binary form must reproduce the above copyright
   15  *     notice, this list of conditions, and the following disclaimer in the
   16  *     documentation and/or other materials provided with the distribution.
   17  * 3.  The name of The Aerospace Corporation may not be used to endorse or
   18  *     promote products derived from this software.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * Copyright (c) 1996-1999 Whistle Communications, Inc.
   33  * All rights reserved.
   34  * 
   35  * Subject to the following obligations and disclaimer of warranty, use and
   36  * redistribution of this software, in source or object code forms, with or
   37  * without modifications are expressly permitted by Whistle Communications;
   38  * provided, however, that:
   39  * 1. Any and all reproductions of the source or object code must include the
   40  *    copyright notice above and the following disclaimer of warranties; and
   41  * 2. No rights are granted, in any manner or form, to use Whistle
   42  *    Communications, Inc. trademarks, including the mark "WHISTLE
   43  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   44  *    such appears in the above copyright notice or in the software.
   45  * 
   46  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   47  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   48  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   49  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   50  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   51  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
   52  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   53  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   54  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   55  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   56  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   57  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   58  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   61  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   62  * OF SUCH DAMAGE.
   63  *
   64  * Author:              Brooks Davis <brooks@FreeBSD.org>
   65  * Derived from:        ng_hole.c
   66  *
   67  * $FreeBSD: src/sys/netgraph/ng_ip_input.c,v 1.4 2005/01/07 01:45:39 imp Exp $
   68  */
   69 
   70 /*
   71  * This node simply takes IP packets and calls ip_input on them
   72  */
   73 
   74 #include <sys/param.h>
   75 #include <sys/systm.h>
   76 #include <sys/kernel.h>
   77 #include <sys/malloc.h>
   78 #include <sys/mbuf.h>
   79 #include <sys/socket.h>
   80 #include <net/if.h>
   81 #include <net/if_types.h>
   82 #include <net/if_var.h>
   83 #include <netinet/in.h>
   84 #include <netinet/in_var.h>
   85 #include <net/netisr.h>
   86 #include <netgraph/ng_message.h>
   87 #include <netgraph/netgraph.h>
   88 #include <netgraph/ng_ip_input.h>
   89 
   90 /* Netgraph methods */
   91 static ng_constructor_t ngipi_cons;
   92 static ng_rcvdata_t     ngipi_rcvdata;
   93 static ng_disconnect_t  ngipi_disconnect;
   94 
   95 static struct ng_type typestruct = {
   96         .version =      NG_ABI_VERSION,
   97         .name =         NG_IP_INPUT_NODE_TYPE,
   98         .constructor =  ngipi_cons,
   99         .rcvdata =      ngipi_rcvdata,
  100         .disconnect =   ngipi_disconnect,
  101 };
  102 NETGRAPH_INIT(ip_input, &typestruct);
  103 
  104 /* 
  105  * Be obliging. but no work to do.
  106  */
  107 static int
  108 ngipi_cons(node_p node)
  109 {
  110         return(0);
  111 }
  112 
  113 /*
  114  * Receive data
  115  */
  116 static int
  117 ngipi_rcvdata(hook_p hook, item_p item)
  118 {
  119         struct mbuf *m;
  120 
  121         NGI_GET_M(item, m);
  122         NG_FREE_ITEM(item);
  123         netisr_dispatch(NETISR_IP, m);
  124         return 0;
  125 }
  126 
  127 /*
  128  * Hook disconnection
  129  */
  130 static int
  131 ngipi_disconnect(hook_p hook)
  132 {
  133         if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
  134                 ng_rmnode_self(NG_HOOK_NODE(hook));
  135         return (0);
  136 }

Cache object: 79dc271624873273e7b58c62ca5a8623


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