1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 59 gif_status(if_ctx *ctx) 60 { 61 int opts; 62 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 63 64 if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1) 65 return; 66 if (opts == 0) 67 return; 68 printb("\toptions", opts, GIFBITS); 69 putchar('\n'); 70 } 71 72 static void 73 setgifopts(if_ctx *ctx, const char *val __unused, int d) 74 { 75 int opts; 76 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 77 78 if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1) { 79 warn("ioctl(GIFGOPTS)"); 80 return; 81 } 82 83 if (d < 0) 84 opts &= ~(-d); 85 else 86 opts |= d; 87 88 if (ioctl_ctx(ctx, GIFSOPTS, &ifr) == -1) { 89 warn("ioctl(GIFSOPTS)"); 90 return; 91 } 92 } 93 94 static struct cmd gif_cmds[] = { 95 DEF_CMD("ignore_source", GIF_IGNORE_SOURCE, setgifopts), 96 DEF_CMD("-ignore_source", -GIF_IGNORE_SOURCE, setgifopts), 97 }; 98 99 static struct afswtch af_gif = { 100 .af_name = "af_gif", 101 .af_af = AF_UNSPEC, 102 .af_other_status = gif_status, 103 }; 104 105 static __constructor void 106 gif_ctor(void) 107 { 108 size_t i; 109 110 for (i = 0; i < nitems(gif_cmds); i++) 111 cmd_register(&gif_cmds[i]); 112 af_register(&af_gif); 113 } 114