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 * $FreeBSD$ 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 <sys/proc.h> 81 #include <net/if.h> 82 #include <net/if_types.h> 83 #include <net/if_var.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 #include <net/netisr.h> 87 #include <netgraph/ng_message.h> 88 #include <netgraph/netgraph.h> 89 #include <netgraph/ng_ip_input.h> 90 91 /* Netgraph methods */ 92 static ng_constructor_t ngipi_cons; 93 static ng_rcvdata_t ngipi_rcvdata; 94 static ng_disconnect_t ngipi_disconnect; 95 96 static struct ng_type typestruct = { 97 .version = NG_ABI_VERSION, 98 .name = NG_IP_INPUT_NODE_TYPE, 99 .constructor = ngipi_cons, 100 .rcvdata = ngipi_rcvdata, 101 .disconnect = ngipi_disconnect, 102 }; 103 NETGRAPH_INIT(ip_input, &typestruct); 104 105 /* 106 * Be obliging. but no work to do. 107 */ 108 static int 109 ngipi_cons(node_p node) 110 { 111 return(0); 112 } 113 114 /* 115 * Receive data 116 */ 117 static int 118 ngipi_rcvdata(hook_p hook, item_p item) 119 { 120 struct mbuf *m; 121 122 NGI_GET_M(item, m); 123 NG_FREE_ITEM(item); 124 if (curthread->td_ng_outbound) 125 netisr_queue(NETISR_IP, m); 126 else 127 netisr_dispatch(NETISR_IP, m); 128 return 0; 129 } 130 131 /* 132 * Hook disconnection 133 */ 134 static int 135 ngipi_disconnect(hook_p hook) 136 { 137 if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 138 ng_rmnode_self(NG_HOOK_NODE(hook)); 139 return (0); 140 } 141