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
setifgroup(if_ctx * ctx,const char * group_name,int dummy __unused)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
unsetifgroup(if_ctx * ctx,const char * group_name,int dummy __unused)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
getifgroups(if_ctx * ctx)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
printgroup(const char * groupname)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
group_ctor(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