1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 Max Laier. 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <sys/param.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <net/if.h> 37 38 #include <ctype.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include <libifconfig.h> 47 48 #include "ifconfig.h" 49 50 static void 51 setifgroup(if_ctx *ctx, const char *group_name, int dummy __unused) 52 { 53 struct ifgroupreq ifgr; 54 55 memset(&ifgr, 0, sizeof(ifgr)); 56 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); 57 58 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 59 errx(1, "setifgroup: group names may not end in a digit"); 60 61 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 62 errx(1, "setifgroup: group name too long"); 63 if (ioctl_ctx(ctx, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST) 64 err(1," SIOCAIFGROUP"); 65 } 66 67 static void 68 unsetifgroup(if_ctx *ctx, const char *group_name, int dummy __unused) 69 { 70 struct ifgroupreq ifgr; 71 72 memset(&ifgr, 0, sizeof(ifgr)); 73 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); 74 75 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 76 errx(1, "unsetifgroup: group names may not end in a digit"); 77 78 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 79 errx(1, "unsetifgroup: group name too long"); 80 if (ioctl_ctx(ctx, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT) 81 err(1, "SIOCDIFGROUP"); 82 } 83 84 static void 85 getifgroups(if_ctx *ctx __unused) 86 { 87 struct ifgroupreq ifgr; 88 size_t cnt; 89 90 if (ifconfig_get_groups(lifh, name, &ifgr) == -1) 91 return; 92 93 cnt = 0; 94 for (size_t i = 0; i < ifgr.ifgr_len / sizeof(struct ifg_req); ++i) { 95 struct ifg_req *ifg = &ifgr.ifgr_groups[i]; 96 97 if (strcmp(ifg->ifgrq_group, "all")) { 98 if (cnt == 0) 99 printf("\tgroups:"); 100 cnt++; 101 printf(" %s", ifg->ifgrq_group); 102 } 103 } 104 if (cnt) 105 printf("\n"); 106 107 free(ifgr.ifgr_groups); 108 } 109 110 static void 111 printgroup(const char *groupname) 112 { 113 struct ifgroupreq ifgr; 114 struct ifg_req *ifg; 115 unsigned int len; 116 int s; 117 118 s = socket(AF_LOCAL, SOCK_DGRAM, 0); 119 if (s == -1) 120 err(1, "socket(AF_LOCAL,SOCK_DGRAM)"); 121 bzero(&ifgr, sizeof(ifgr)); 122 strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name)); 123 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 124 if (errno == EINVAL || errno == ENOTTY || 125 errno == ENOENT) 126 exit(exit_code); 127 else 128 err(1, "SIOCGIFGMEMB"); 129 } 130 131 len = ifgr.ifgr_len; 132 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 133 err(1, "printgroup"); 134 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 135 err(1, "SIOCGIFGMEMB"); 136 137 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 138 ifg++) { 139 len -= sizeof(struct ifg_req); 140 printf("%s\n", ifg->ifgrq_member); 141 } 142 free(ifgr.ifgr_groups); 143 144 exit(exit_code); 145 } 146 147 static struct cmd group_cmds[] = { 148 DEF_CMD_ARG("group", setifgroup), 149 DEF_CMD_ARG("-group", unsetifgroup), 150 }; 151 152 static struct afswtch af_group = { 153 .af_name = "af_group", 154 .af_af = AF_UNSPEC, 155 .af_other_status = getifgroups, 156 }; 157 158 static struct option group_gopt = { 159 .opt = "g:", 160 .opt_usage = "[-g groupname]", 161 .cb = printgroup, 162 }; 163 164 static __constructor void 165 group_ctor(void) 166 { 167 for (size_t i = 0; i < nitems(group_cmds); i++) 168 cmd_register(&group_cmds[i]); 169 af_register(&af_group); 170 opt_register(&group_gopt); 171 } 172