1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2008 Andrew Thompson. 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/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/ioctl.h> 33 #include <sys/socket.h> 34 #include <sys/sockio.h> 35 #include <net/if.h> 36 #include <net/if_gre.h> 37 38 #include <ctype.h> 39 #include <limits.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <err.h> 44 45 #include "ifconfig.h" 46 47 #define GREBITS "\020\01ENABLE_CSUM\02ENABLE_SEQ" 48 49 static void gre_status(int s); 50 51 static void 52 gre_status(int s) 53 { 54 uint32_t opts = 0; 55 56 ifr.ifr_data = (caddr_t)&opts; 57 if (ioctl(s, GREGKEY, &ifr) == 0) 58 if (opts != 0) 59 printf("\tgrekey: 0x%x (%u)\n", opts, opts); 60 opts = 0; 61 if (ioctl(s, GREGOPTS, &ifr) != 0 || opts == 0) 62 return; 63 printb("\toptions", opts, GREBITS); 64 putchar('\n'); 65 } 66 67 static void 68 setifgrekey(const char *val, int dummy __unused, int s, 69 const struct afswtch *afp) 70 { 71 uint32_t grekey = strtol(val, NULL, 0); 72 73 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 74 ifr.ifr_data = (caddr_t)&grekey; 75 if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0) 76 warn("ioctl (set grekey)"); 77 } 78 79 static void 80 setifgreopts(const char *val, int d, int s, const struct afswtch *afp) 81 { 82 uint32_t opts; 83 84 ifr.ifr_data = (caddr_t)&opts; 85 if (ioctl(s, GREGOPTS, &ifr) == -1) { 86 warn("ioctl(GREGOPTS)"); 87 return; 88 } 89 90 if (d < 0) 91 opts &= ~(-d); 92 else 93 opts |= d; 94 95 if (ioctl(s, GRESOPTS, &ifr) == -1) { 96 warn("ioctl(GIFSOPTS)"); 97 return; 98 } 99 } 100 101 102 static struct cmd gre_cmds[] = { 103 DEF_CMD_ARG("grekey", setifgrekey), 104 DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts), 105 DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts), 106 DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts), 107 DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts), 108 }; 109 static struct afswtch af_gre = { 110 .af_name = "af_gre", 111 .af_af = AF_UNSPEC, 112 .af_other_status = gre_status, 113 }; 114 115 static __constructor void 116 gre_ctor(void) 117 { 118 size_t i; 119 120 for (i = 0; i < nitems(gre_cmds); i++) 121 cmd_register(&gre_cmds[i]); 122 af_register(&af_gre); 123 } 124