1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 29 #include <sys/ioctl.h> 30 #include <sys/socket.h> 31 #include <sys/sockio.h> 32 #include <net/if.h> 33 #include <net/if_gre.h> 34 35 #include <ctype.h> 36 #include <limits.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <err.h> 41 42 #include "ifconfig.h" 43 44 static const char *GREBITS[] = { 45 [0] = "ENABLE_CSUM", 46 [1] = "ENABLE_SEQ", 47 [2] = "UDPENCAP", 48 }; 49 50 static void 51 gre_status(if_ctx *ctx) 52 { 53 uint32_t opts = 0, port; 54 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 55 56 if (ioctl_ctx(ctx, GREGKEY, &ifr) == 0) 57 if (opts != 0) 58 printf("\tgrekey: 0x%x (%u)\n", opts, opts); 59 opts = 0; 60 if (ioctl_ctx(ctx, GREGOPTS, &ifr) != 0 || opts == 0) 61 return; 62 63 port = 0; 64 ifr.ifr_data = (caddr_t)&port; 65 if (ioctl_ctx_ifr(ctx, GREGPORT, &ifr) == 0 && port != 0) 66 printf("\tudpport: %u\n", port); 67 printf("\toptions=%x", opts); 68 print_bits("options", &opts, 1, GREBITS, nitems(GREBITS)); 69 putchar('\n'); 70 } 71 72 static void 73 setifgrekey(if_ctx *ctx, const char *val, int dummy __unused) 74 { 75 uint32_t grekey = strtol(val, NULL, 0); 76 struct ifreq ifr = { .ifr_data = (caddr_t)&grekey }; 77 78 ifr.ifr_data = (caddr_t)&grekey; 79 if (ioctl_ctx_ifr(ctx, GRESKEY, &ifr) < 0) 80 warn("ioctl (set grekey)"); 81 } 82 83 static void 84 setifgreport(if_ctx *ctx, const char *val, int dummy __unused) 85 { 86 uint32_t udpport = strtol(val, NULL, 0); 87 struct ifreq ifr = { .ifr_data = (caddr_t)&udpport }; 88 89 if (ioctl_ctx_ifr(ctx, GRESPORT, &ifr) < 0) 90 warn("ioctl (set udpport)"); 91 } 92 93 static void 94 setifgreopts(if_ctx *ctx, const char *val __unused, int d) 95 { 96 uint32_t opts; 97 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 98 99 if (ioctl_ctx_ifr(ctx, GREGOPTS, &ifr) == -1) { 100 warn("ioctl(GREGOPTS)"); 101 return; 102 } 103 104 if (d < 0) 105 opts &= ~(-d); 106 else 107 opts |= d; 108 109 if (ioctl_ctx(ctx, GRESOPTS, &ifr) == -1) { 110 warn("ioctl(GIFSOPTS)"); 111 return; 112 } 113 } 114 115 116 static struct cmd gre_cmds[] = { 117 DEF_CMD_ARG("grekey", setifgrekey), 118 DEF_CMD_ARG("udpport", setifgreport), 119 DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts), 120 DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts), 121 DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts), 122 DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts), 123 DEF_CMD("udpencap", GRE_UDPENCAP, setifgreopts), 124 DEF_CMD("-udpencap",-GRE_UDPENCAP, setifgreopts), 125 }; 126 static struct afswtch af_gre = { 127 .af_name = "af_gre", 128 .af_af = AF_UNSPEC, 129 .af_other_status = gre_status, 130 }; 131 132 static __constructor void 133 gre_ctor(void) 134 { 135 size_t i; 136 137 for (i = 0; i < nitems(gre_cmds); i++) 138 cmd_register(&gre_cmds[i]); 139 af_register(&af_gre); 140 } 141