1 /*- 2 * Copyright (c) 2009 Hiroki Sato. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 17 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 19 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 21 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 22 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef lint 27 static const char rcsid[] = 28 "$FreeBSD$"; 29 #endif 30 31 #include <sys/param.h> 32 #include <sys/ioctl.h> 33 #include <sys/socket.h> 34 #include <sys/sockio.h> 35 36 #include <stdlib.h> 37 #include <unistd.h> 38 39 #include <net/ethernet.h> 40 #include <net/if.h> 41 #include <net/if_gif.h> 42 #include <net/route.h> 43 44 #include <ctype.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include <err.h> 50 #include <errno.h> 51 52 #include "ifconfig.h" 53 54 #define GIFBITS "\020\1ACCEPT_REV_ETHIP_VER\5SEND_REV_ETHIP_VER" 55 56 static void gif_status(int); 57 58 static void 59 gif_status(int s) 60 { 61 int opts; 62 63 ifr.ifr_data = (caddr_t)&opts; 64 if (ioctl(s, 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(const char *val, 74 int d, int s, const struct afswtch *afp) 75 { 76 int opts; 77 78 ifr.ifr_data = (caddr_t)&opts; 79 if (ioctl(s, GIFGOPTS, &ifr) == -1) { 80 warn("ioctl(GIFGOPTS)"); 81 return; 82 } 83 84 if (d < 0) 85 opts &= ~(-d); 86 else 87 opts |= d; 88 89 if (ioctl(s, GIFSOPTS, &ifr) == -1) { 90 warn("ioctl(GIFSOPTS)"); 91 return; 92 } 93 } 94 95 static struct cmd gif_cmds[] = { 96 DEF_CMD("accept_rev_ethip_ver", GIF_ACCEPT_REVETHIP, setgifopts), 97 DEF_CMD("-accept_rev_ethip_ver",-GIF_ACCEPT_REVETHIP, setgifopts), 98 DEF_CMD("send_rev_ethip_ver", GIF_SEND_REVETHIP, setgifopts), 99 DEF_CMD("-send_rev_ethip_ver", -GIF_SEND_REVETHIP, setgifopts), 100 }; 101 102 static struct afswtch af_gif = { 103 .af_name = "af_gif", 104 .af_af = AF_UNSPEC, 105 .af_other_status = gif_status, 106 }; 107 108 static __constructor void 109 gif_ctor(void) 110 { 111 #define N(a) (sizeof(a) / sizeof(a[0])) 112 size_t i; 113 114 for (i = 0; i < N(gif_cmds); i++) 115 cmd_register(&gif_cmds[i]); 116 af_register(&af_gif); 117 #undef N 118 } 119