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 #include <sys/param.h> 29 #include <sys/ioctl.h> 30 #include <sys/socket.h> 31 #include <net/if.h> 32 33 #include <ctype.h> 34 #include <err.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include <libifconfig.h> 42 43 #include "ifconfig.h" 44 45 static void 46 setifgroup(if_ctx *ctx, const char *group_name, int dummy __unused) 47 { 48 struct ifgroupreq ifgr = {}; 49 50 strlcpy(ifgr.ifgr_name, ctx->ifname, IFNAMSIZ); 51 52 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 53 errx(1, "setifgroup: group names may not end in a digit"); 54 55 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 56 errx(1, "setifgroup: group name too long"); 57 if (ioctl_ctx(ctx, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST) 58 err(1," SIOCAIFGROUP"); 59 } 60 61 static void 62 unsetifgroup(if_ctx *ctx, const char *group_name, int dummy __unused) 63 { 64 struct ifgroupreq ifgr = {}; 65 66 strlcpy(ifgr.ifgr_name, ctx->ifname, IFNAMSIZ); 67 68 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1])) 69 errx(1, "unsetifgroup: group names may not end in a digit"); 70 71 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ) 72 errx(1, "unsetifgroup: group name too long"); 73 if (ioctl_ctx(ctx, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT) 74 err(1, "SIOCDIFGROUP"); 75 } 76 77 static void 78 getifgroups(if_ctx *ctx) 79 { 80 struct ifgroupreq ifgr; 81 size_t cnt; 82 83 if (ifconfig_get_groups(lifh, ctx->ifname, &ifgr) == -1) 84 return; 85 86 cnt = 0; 87 for (size_t i = 0; i < ifgr.ifgr_len / sizeof(struct ifg_req); ++i) { 88 struct ifg_req *ifg = &ifgr.ifgr_groups[i]; 89 90 if (strcmp(ifg->ifgrq_group, "all")) { 91 if (cnt == 0) 92 printf("\tgroups:"); 93 cnt++; 94 printf(" %s", ifg->ifgrq_group); 95 } 96 } 97 if (cnt) 98 printf("\n"); 99 100 free(ifgr.ifgr_groups); 101 } 102 103 static void 104 printgroup(const char *groupname) 105 { 106 struct ifgroupreq ifgr; 107 struct ifg_req *ifg; 108 unsigned int len; 109 int s; 110 111 s = socket(AF_LOCAL, SOCK_DGRAM, 0); 112 if (s == -1) 113 err(1, "socket(AF_LOCAL,SOCK_DGRAM)"); 114 bzero(&ifgr, sizeof(ifgr)); 115 strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name)); 116 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 117 if (errno == EINVAL || errno == ENOTTY || 118 errno == ENOENT) 119 exit(exit_code); 120 else 121 err(1, "SIOCGIFGMEMB"); 122 } 123 124 len = ifgr.ifgr_len; 125 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 126 err(1, "printgroup"); 127 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 128 err(1, "SIOCGIFGMEMB"); 129 130 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 131 ifg++) { 132 len -= sizeof(struct ifg_req); 133 printf("%s\n", ifg->ifgrq_member); 134 } 135 free(ifgr.ifgr_groups); 136 137 exit(exit_code); 138 } 139 140 static struct cmd group_cmds[] = { 141 DEF_CMD_ARG("group", setifgroup), 142 DEF_CMD_ARG("-group", unsetifgroup), 143 }; 144 145 static struct afswtch af_group = { 146 .af_name = "af_group", 147 .af_af = AF_UNSPEC, 148 .af_other_status = getifgroups, 149 }; 150 151 static struct option group_gopt = { 152 .opt = "g:", 153 .opt_usage = "[-g groupname]", 154 .cb = printgroup, 155 }; 156 157 static __constructor void 158 group_ctor(void) 159 { 160 for (size_t i = 0; i < nitems(group_cmds); i++) 161 cmd_register(&group_cmds[i]); 162 af_register(&af_group); 163 opt_register(&group_gopt); 164 } 165