1/*-
2 * Copyright (c) 2006 Max Laier. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#ifndef lint
27static const char rcsid[] =
28 "$FreeBSD: head/sbin/ifconfig/ifgroup.c 288305 2015-09-27 07:51:18Z ngie $";
29#endif /* not lint */
30
31#include <sys/param.h>
32#include <sys/ioctl.h>
33#include <sys/socket.h>
34#include <net/if.h>
35
36#include <ctype.h>
37#include <err.h>
38#include <errno.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44#include "ifconfig.h"
45
46/* ARGSUSED */
47static void
48setifgroup(const char *group_name, int d, int s, const struct afswtch *rafp)
49{
50 struct ifgroupreq ifgr;
51
52 memset(&ifgr, 0, sizeof(ifgr));
53 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
54
55 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1]))
56 errx(1, "setifgroup: group names may not end in a digit");
57
58 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ)
59 errx(1, "setifgroup: group name too long");
60 if (ioctl(s, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST)
61 err(1," SIOCAIFGROUP");
62}
63
64/* ARGSUSED */
65static void
66unsetifgroup(const char *group_name, int d, int s, const struct afswtch *rafp)
67{
68 struct ifgroupreq ifgr;
69
70 memset(&ifgr, 0, sizeof(ifgr));
71 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
72
73 if (group_name[0] && isdigit(group_name[strlen(group_name) - 1]))
74 errx(1, "unsetifgroup: group names may not end in a digit");
75
76 if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ)
77 errx(1, "unsetifgroup: group name too long");
78 if (ioctl(s, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT)
79 err(1, "SIOCDIFGROUP");
80}
81
82static void
83getifgroups(int s)
84{
85 int len, cnt;
86 struct ifgroupreq ifgr;
87 struct ifg_req *ifg;
88
89 memset(&ifgr, 0, sizeof(ifgr));
90 strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
91
92 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
93 if (errno == EINVAL || errno == ENOTTY)
94 return;
95 else
96 err(1, "SIOCGIFGROUP");
97 }
98
99 len = ifgr.ifgr_len;
100 ifgr.ifgr_groups =
101 (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
102 sizeof(struct ifg_req));
103 if (ifgr.ifgr_groups == NULL)
104 err(1, "getifgroups");
105 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
106 err(1, "SIOCGIFGROUP");
107
108 cnt = 0;
109 ifg = ifgr.ifgr_groups;
110 for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
111 len -= sizeof(struct ifg_req);
112 if (strcmp(ifg->ifgrq_group, "all")) {
113 if (cnt == 0)
114 printf("\tgroups: ");
115 cnt++;
116 printf("%s ", ifg->ifgrq_group);
117 }
118 }
119 if (cnt)
120 printf("\n");
121
122 free(ifgr.ifgr_groups);
123}
124
125static void
126printgroup(const char *groupname)
127{
128 struct ifgroupreq ifgr;
129 struct ifg_req *ifg;
130 int len, cnt = 0;
131 int s;
132
133 s = socket(AF_LOCAL, SOCK_DGRAM, 0);
134 if (s == -1)
135 err(1, "socket(AF_LOCAL,SOCK_DGRAM)");
136 bzero(&ifgr, sizeof(ifgr));
137 strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name));
138 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
139 if (errno == EINVAL || errno == ENOTTY ||
140 errno == ENOENT)
141 exit(0);
142 else
143 err(1, "SIOCGIFGMEMB");
144 }
145
146 len = ifgr.ifgr_len;
147 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
148 err(1, "printgroup");
149 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
150 err(1, "SIOCGIFGMEMB");
151
152 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
153 ifg++) {
154 len -= sizeof(struct ifg_req);
155 printf("%s\n", ifg->ifgrq_member);
156 cnt++;
157 }
158 free(ifgr.ifgr_groups);
159
160 exit(0);
161}
162
163static struct cmd group_cmds[] = {
164 DEF_CMD_ARG("group", setifgroup),
165 DEF_CMD_ARG("-group", unsetifgroup),
166};
167static struct afswtch af_group = {
168 .af_name = "af_group",
169 .af_af = AF_UNSPEC,
170 .af_other_status = getifgroups,
171};
172static struct option group_gopt = { "g:", "[-g groupname]", printgroup };
173
174static __constructor void
175group_ctor(void)
176{
177 int i;
178
179 for (i = 0; i < nitems(group_cmds); i++)
180 cmd_register(&group_cmds[i]);
181 af_register(&af_group);
182 opt_register(&group_gopt);
183}