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 #define GREBITS "\020\01ENABLE_CSUM\02ENABLE_SEQ\03UDPENCAP" 45 46 static void 47 gre_status(if_ctx *ctx) 48 { 49 uint32_t opts = 0, port; 50 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 51 52 if (ioctl_ctx(ctx, GREGKEY, &ifr) == 0) 53 if (opts != 0) 54 printf("\tgrekey: 0x%x (%u)\n", opts, opts); 55 opts = 0; 56 if (ioctl_ctx(ctx, GREGOPTS, &ifr) != 0 || opts == 0) 57 return; 58 59 port = 0; 60 ifr.ifr_data = (caddr_t)&port; 61 if (ioctl_ctx_ifr(ctx, GREGPORT, &ifr) == 0 && port != 0) 62 printf("\tudpport: %u\n", port); 63 printb("\toptions", opts, GREBITS); 64 putchar('\n'); 65 } 66 67 static void 68 setifgrekey(if_ctx *ctx, const char *val, int dummy __unused) 69 { 70 uint32_t grekey = strtol(val, NULL, 0); 71 struct ifreq ifr = { .ifr_data = (caddr_t)&grekey }; 72 73 ifr.ifr_data = (caddr_t)&grekey; 74 if (ioctl_ctx_ifr(ctx, GRESKEY, &ifr) < 0) 75 warn("ioctl (set grekey)"); 76 } 77 78 static void 79 setifgreport(if_ctx *ctx, const char *val, int dummy __unused) 80 { 81 uint32_t udpport = strtol(val, NULL, 0); 82 struct ifreq ifr = { .ifr_data = (caddr_t)&udpport }; 83 84 if (ioctl_ctx_ifr(ctx, GRESPORT, &ifr) < 0) 85 warn("ioctl (set udpport)"); 86 } 87 88 static void 89 setifgreopts(if_ctx *ctx, const char *val __unused, int d) 90 { 91 uint32_t opts; 92 struct ifreq ifr = { .ifr_data = (caddr_t)&opts }; 93 94 if (ioctl_ctx_ifr(ctx, GREGOPTS, &ifr) == -1) { 95 warn("ioctl(GREGOPTS)"); 96 return; 97 } 98 99 if (d < 0) 100 opts &= ~(-d); 101 else 102 opts |= d; 103 104 if (ioctl_ctx(ctx, GRESOPTS, &ifr) == -1) { 105 warn("ioctl(GIFSOPTS)"); 106 return; 107 } 108 } 109 110 111 static struct cmd gre_cmds[] = { 112 DEF_CMD_ARG("grekey", setifgrekey), 113 DEF_CMD_ARG("udpport", setifgreport), 114 DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts), 115 DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts), 116 DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts), 117 DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts), 118 DEF_CMD("udpencap", GRE_UDPENCAP, setifgreopts), 119 DEF_CMD("-udpencap",-GRE_UDPENCAP, setifgreopts), 120 }; 121 static struct afswtch af_gre = { 122 .af_name = "af_gre", 123 .af_af = AF_UNSPEC, 124 .af_other_status = gre_status, 125 }; 126 127 static __constructor void 128 gre_ctor(void) 129 { 130 size_t i; 131 132 for (i = 0; i < nitems(gre_cmds); i++) 133 cmd_register(&gre_cmds[i]); 134 af_register(&af_gre); 135 } 136