1 /* 2 * ng_ip_input.c 3 */ 4 5 /*- 6 * SPDX-License-Identifier: BSD-3-Clause AND BSD-2-Clause 7 * 8 * Copyright 2001 The Aerospace Corporation. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions, and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of The Aerospace Corporation may not be used to endorse or 20 * promote products derived from this software. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Copyright (c) 1996-1999 Whistle Communications, Inc. 35 * All rights reserved. 36 * 37 * Subject to the following obligations and disclaimer of warranty, use and 38 * redistribution of this software, in source or object code forms, with or 39 * without modifications are expressly permitted by Whistle Communications; 40 * provided, however, that: 41 * 1. Any and all reproductions of the source or object code must include the 42 * copyright notice above and the following disclaimer of warranties; and 43 * 2. No rights are granted, in any manner or form, to use Whistle 44 * Communications, Inc. trademarks, including the mark "WHISTLE 45 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 46 * such appears in the above copyright notice or in the software. 47 * 48 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 49 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 50 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 51 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 52 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 53 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 54 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 55 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 56 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 57 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 58 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 59 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 60 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 63 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 64 * OF SUCH DAMAGE. 65 * 66 * Author: Brooks Davis <brooks@FreeBSD.org> 67 * Derived from: ng_hole.c 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 struct epoch_tracker et; 128 129 NET_EPOCH_ENTER(et); 130 netisr_dispatch(NETISR_IP, m); 131 NET_EPOCH_EXIT(et); 132 } 133 return 0; 134 } 135 136 /* 137 * Hook disconnection 138 */ 139 static int 140 ngipi_disconnect(hook_p hook) 141 { 142 if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 143 ng_rmnode_self(NG_HOOK_NODE(hook)); 144 return (0); 145 } 146