1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 "ifconfig.h" 47 48 /* ARGSUSED */ 49 static void 50 setifgroup(const char *group_name, int d, int s, const struct afswtch *rafp) 51 { 52 struct ifgroupreq ifgr; 53 54 memset(&ifgr, 0, sizeof(ifgr)); 55 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); 56 57 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 58 errx(1, "setifgroup: group names may not end in a digit"); 59 60 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 61 errx(1, "setifgroup: group name too long"); 62 if (ioctl(s, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST) 63 err(1," SIOCAIFGROUP"); 64 } 65 66 /* ARGSUSED */ 67 static void 68 unsetifgroup(const char *group_name, int d, int s, const struct afswtch *rafp) 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(s, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT) 81 err(1, "SIOCDIFGROUP"); 82 } 83 84 static void 85 getifgroups(int s) 86 { 87 int len, cnt; 88 struct ifgroupreq ifgr; 89 struct ifg_req *ifg; 90 91 memset(&ifgr, 0, sizeof(ifgr)); 92 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); 93 94 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) { 95 if (errno == EINVAL || errno == ENOTTY) 96 return; 97 else 98 err(1, "SIOCGIFGROUP"); 99 } 100 101 len = ifgr.ifgr_len; 102 ifgr.ifgr_groups = 103 (struct ifg_req *)calloc(len / sizeof(struct ifg_req), 104 sizeof(struct ifg_req)); 105 if (ifgr.ifgr_groups == NULL) 106 err(1, "getifgroups"); 107 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) 108 err(1, "SIOCGIFGROUP"); 109 110 cnt = 0; 111 ifg = ifgr.ifgr_groups; 112 for (; ifg && len >= sizeof(struct ifg_req); ifg++) { 113 len -= sizeof(struct ifg_req); 114 if (strcmp(ifg->ifgrq_group, "all")) { 115 if (cnt == 0) 116 printf("\tgroups: "); 117 cnt++; 118 printf("%s ", ifg->ifgrq_group); 119 } 120 } 121 if (cnt) 122 printf("\n"); 123 124 free(ifgr.ifgr_groups); 125 } 126 127 static void 128 printgroup(const char *groupname) 129 { 130 struct ifgroupreq ifgr; 131 struct ifg_req *ifg; 132 int len, cnt = 0; 133 int s; 134 135 s = socket(AF_LOCAL, SOCK_DGRAM, 0); 136 if (s == -1) 137 err(1, "socket(AF_LOCAL,SOCK_DGRAM)"); 138 bzero(&ifgr, sizeof(ifgr)); 139 strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name)); 140 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 141 if (errno == EINVAL || errno == ENOTTY || 142 errno == ENOENT) 143 exit(exit_code); 144 else 145 err(1, "SIOCGIFGMEMB"); 146 } 147 148 len = ifgr.ifgr_len; 149 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 150 err(1, "printgroup"); 151 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 152 err(1, "SIOCGIFGMEMB"); 153 154 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 155 ifg++) { 156 len -= sizeof(struct ifg_req); 157 printf("%s\n", ifg->ifgrq_member); 158 cnt++; 159 } 160 free(ifgr.ifgr_groups); 161 162 exit(exit_code); 163 } 164 165 static struct cmd group_cmds[] = { 166 DEF_CMD_ARG("group", setifgroup), 167 DEF_CMD_ARG("-group", unsetifgroup), 168 }; 169 static struct afswtch af_group = { 170 .af_name = "af_group", 171 .af_af = AF_UNSPEC, 172 .af_other_status = getifgroups, 173 }; 174 static struct option group_gopt = { "g:", "[-g groupname]", printgroup }; 175 176 static __constructor void 177 group_ctor(void) 178 { 179 int i; 180 181 for (i = 0; i < nitems(group_cmds); i++) 182 cmd_register(&group_cmds[i]); 183 af_register(&af_group); 184 opt_register(&group_gopt); 185 } 186