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 #include <sys/param.h> 29 #include <sys/ioctl.h> 30 #include <sys/socket.h> 31 #include <sys/sockio.h> 32 33 #include <stdlib.h> 34 #include <unistd.h> 35 36 #include <net/ethernet.h> 37 #include <net/if.h> 38 #include <net/if_gif.h> 39 #include <net/route.h> 40 41 #include <ctype.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <err.h> 47 #include <errno.h> 48 49 #include "ifconfig.h" 50 51 static const char *GIFBITS[] = { 52 [1] = "IGNORE_SOURCE", 53 }; 54 55 static void 56 gif_status(if_ctx *ctx) 57 { 58 int opts; 59 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 60 61 if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1) 62 return; 63 if (opts == 0) 64 return; 65 printf("\toptions=%x", opts); 66 print_bits("options", &opts, 1, GIFBITS, nitems(GIFBITS)); 67 putchar('\n'); 68 } 69 70 static void 71 setgifopts(if_ctx *ctx, const char *val __unused, int d) 72 { 73 int opts; 74 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 75 76 if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1) { 77 warn("ioctl(GIFGOPTS)"); 78 return; 79 } 80 81 if (d < 0) 82 opts &= ~(-d); 83 else 84 opts |= d; 85 86 if (ioctl_ctx(ctx, GIFSOPTS, &ifr) == -1) { 87 warn("ioctl(GIFSOPTS)"); 88 return; 89 } 90 } 91 92 static struct cmd gif_cmds[] = { 93 DEF_CMD("ignore_source", GIF_IGNORE_SOURCE, setgifopts), 94 DEF_CMD("-ignore_source", -GIF_IGNORE_SOURCE, setgifopts), 95 }; 96 97 static struct afswtch af_gif = { 98 .af_name = "af_gif", 99 .af_af = AF_UNSPEC, 100 .af_other_status = gif_status, 101 }; 102 103 static __constructor void 104 gif_ctor(void) 105 { 106 size_t i; 107 108 for (i = 0; i < nitems(gif_cmds); i++) 109 cmd_register(&gif_cmds[i]); 110 af_register(&af_gif); 111 } 112