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 <libifconfig.h> 47 48 #include "ifconfig.h" 49 50 /* ARGSUSED */ 51 static void 52 setifgroup(const char *group_name, int d, int s, const struct afswtch *rafp) 53 { 54 struct ifgroupreq ifgr; 55 56 memset(&ifgr, 0, sizeof(ifgr)); 57 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); 58 59 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 60 errx(1, "setifgroup: group names may not end in a digit"); 61 62 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 63 errx(1, "setifgroup: group name too long"); 64 if (ioctl(s, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST) 65 err(1," SIOCAIFGROUP"); 66 } 67 68 /* ARGSUSED */ 69 static void 70 unsetifgroup(const char *group_name, int d, int s, const struct afswtch *rafp) 71 { 72 struct ifgroupreq ifgr; 73 74 memset(&ifgr, 0, sizeof(ifgr)); 75 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); 76 77 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 78 errx(1, "unsetifgroup: group names may not end in a digit"); 79 80 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 81 errx(1, "unsetifgroup: group name too long"); 82 if (ioctl(s, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT) 83 err(1, "SIOCDIFGROUP"); 84 } 85 86 static void 87 getifgroups(int s) 88 { 89 ifconfig_handle_t *lifh; 90 struct ifgroupreq ifgr; 91 size_t cnt; 92 93 lifh = ifconfig_open(); 94 if (lifh == NULL) 95 return; 96 97 if (ifconfig_get_groups(lifh, name, &ifgr) == -1) 98 goto close; 99 100 cnt = 0; 101 for (size_t i = 0; i < ifgr.ifgr_len / sizeof(struct ifg_req); ++i) { 102 struct ifg_req *ifg = &ifgr.ifgr_groups[i]; 103 104 if (strcmp(ifg->ifgrq_group, "all")) { 105 if (cnt == 0) 106 printf("\tgroups:"); 107 cnt++; 108 printf(" %s", ifg->ifgrq_group); 109 } 110 } 111 if (cnt) 112 printf("\n"); 113 114 free(ifgr.ifgr_groups); 115 close: 116 ifconfig_close(lifh); 117 } 118 119 static void 120 printgroup(const char *groupname) 121 { 122 struct ifgroupreq ifgr; 123 struct ifg_req *ifg; 124 int len, cnt = 0; 125 int s; 126 127 s = socket(AF_LOCAL, SOCK_DGRAM, 0); 128 if (s == -1) 129 err(1, "socket(AF_LOCAL,SOCK_DGRAM)"); 130 bzero(&ifgr, sizeof(ifgr)); 131 strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name)); 132 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 133 if (errno == EINVAL || errno == ENOTTY || 134 errno == ENOENT) 135 exit(exit_code); 136 else 137 err(1, "SIOCGIFGMEMB"); 138 } 139 140 len = ifgr.ifgr_len; 141 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 142 err(1, "printgroup"); 143 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 144 err(1, "SIOCGIFGMEMB"); 145 146 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 147 ifg++) { 148 len -= sizeof(struct ifg_req); 149 printf("%s\n", ifg->ifgrq_member); 150 cnt++; 151 } 152 free(ifgr.ifgr_groups); 153 154 exit(exit_code); 155 } 156 157 static struct cmd group_cmds[] = { 158 DEF_CMD_ARG("group", setifgroup), 159 DEF_CMD_ARG("-group", unsetifgroup), 160 }; 161 static struct afswtch af_group = { 162 .af_name = "af_group", 163 .af_af = AF_UNSPEC, 164 .af_other_status = getifgroups, 165 }; 166 static struct option group_gopt = { "g:", "[-g groupname]", printgroup }; 167 168 static __constructor void 169 group_ctor(void) 170 { 171 int i; 172 173 for (i = 0; i < nitems(group_cmds); i++) 174 cmd_register(&group_cmds[i]); 175 af_register(&af_group); 176 opt_register(&group_gopt); 177 } 178