1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Hiroki Sato. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 25 * THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif 32 33 #include <sys/param.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <sys/sockio.h> 37 38 #include <stdlib.h> 39 #include <unistd.h> 40 41 #include <net/ethernet.h> 42 #include <net/if.h> 43 #include <net/if_gif.h> 44 #include <net/route.h> 45 46 #include <ctype.h> 47 #include <stdio.h> 48 #include <string.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 #include <err.h> 52 #include <errno.h> 53 54 #include "ifconfig.h" 55 56 #define GIFBITS "\020\2IGNORE_SOURCE" 57 58 static void gif_status(int); 59 60 static void 61 gif_status(int s) 62 { 63 int opts; 64 65 ifr.ifr_data = (caddr_t)&opts; 66 if (ioctl(s, GIFGOPTS, &ifr) == -1) 67 return; 68 if (opts == 0) 69 return; 70 printb("\toptions", opts, GIFBITS); 71 putchar('\n'); 72 } 73 74 static void 75 setgifopts(const char *val, int d, int s, const struct afswtch *afp) 76 { 77 int opts; 78 79 ifr.ifr_data = (caddr_t)&opts; 80 if (ioctl(s, GIFGOPTS, &ifr) == -1) { 81 warn("ioctl(GIFGOPTS)"); 82 return; 83 } 84 85 if (d < 0) 86 opts &= ~(-d); 87 else 88 opts |= d; 89 90 if (ioctl(s, GIFSOPTS, &ifr) == -1) { 91 warn("ioctl(GIFSOPTS)"); 92 return; 93 } 94 } 95 96 static struct cmd gif_cmds[] = { 97 DEF_CMD("ignore_source", GIF_IGNORE_SOURCE, setgifopts), 98 DEF_CMD("-ignore_source", -GIF_IGNORE_SOURCE, setgifopts), 99 }; 100 101 static struct afswtch af_gif = { 102 .af_name = "af_gif", 103 .af_af = AF_UNSPEC, 104 .af_other_status = gif_status, 105 }; 106 107 static __constructor void 108 gif_ctor(void) 109 { 110 size_t i; 111 112 for (i = 0; i < nitems(gif_cmds); i++) 113 cmd_register(&gif_cmds[i]); 114 af_register(&af_gif); 115 } 116