2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char rcsid[] =
37 #include <sys/param.h>
38 #include <sys/ioctl.h>
39 #include <sys/queue.h>
40 #include <sys/socket.h>
54 struct if_clonereq ifcr;
59 s = socket(AF_LOCAL, SOCK_DGRAM, 0);
61 err(1, "socket(AF_LOCAL,SOCK_DGRAM)");
63 memset(&ifcr, 0, sizeof(ifcr));
65 if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0)
66 err(1, "SIOCIFGCLONERS for count");
68 buf = malloc(ifcr.ifcr_total * IFNAMSIZ);
70 err(1, "unable to allocate cloner name buffer");
72 ifcr.ifcr_count = ifcr.ifcr_total;
73 ifcr.ifcr_buffer = buf;
75 if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0)
76 err(1, "SIOCIFGCLONERS for names");
79 * In case some disappeared in the mean time, clamp it down.
81 if (ifcr.ifcr_count > ifcr.ifcr_total)
82 ifcr.ifcr_count = ifcr.ifcr_total;
84 for (cp = buf, idx = 0; idx < ifcr.ifcr_count; idx++, cp += IFNAMSIZ) {
96 char ifprefix[IFNAMSIZ];
97 clone_callback_func *clone_cb;
98 SLIST_ENTRY(clone_defcb) next;
101 static SLIST_HEAD(, clone_defcb) clone_defcbh =
102 SLIST_HEAD_INITIALIZER(clone_defcbh);
105 clone_setdefcallback(const char *ifprefix, clone_callback_func *p)
107 struct clone_defcb *dcp;
109 dcp = malloc(sizeof(*dcp));
110 strlcpy(dcp->ifprefix, ifprefix, IFNAMSIZ-1);
112 SLIST_INSERT_HEAD(&clone_defcbh, dcp, next);
116 * Do the actual clone operation. Any parameters must have been
117 * setup by now. If a callback has been setup to do the work
118 * then defer to it; otherwise do a simple create operation with
122 ifclonecreate(int s, void *arg)
125 struct clone_defcb *dcp;
126 clone_callback_func *clone_cb = NULL;
128 memset(&ifr, 0, sizeof(ifr));
129 (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
131 if (clone_cb == NULL) {
132 /* Try to find a default callback */
133 SLIST_FOREACH(dcp, &clone_defcbh, next) {
134 if (strncmp(dcp->ifprefix, ifr.ifr_name,
135 strlen(dcp->ifprefix)) == 0) {
136 clone_cb = dcp->clone_cb;
141 if (clone_cb == NULL) {
142 /* NB: no parameters */
143 if (ioctl(s, SIOCIFCREATE2, &ifr) < 0)
144 err(1, "SIOCIFCREATE2");
150 * If we get a different name back than we put in, update record and
151 * indicate it should be printed later.
153 if (strncmp(name, ifr.ifr_name, sizeof(name)) != 0) {
154 strlcpy(name, ifr.ifr_name, sizeof(name));
160 DECL_CMD_FUNC(clone_create, arg, d)
162 callback_register(ifclonecreate, NULL);
166 DECL_CMD_FUNC(clone_destroy, arg, d)
168 (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
169 if (ioctl(s, SIOCIFDESTROY, &ifr) < 0)
170 err(1, "SIOCIFDESTROY");
173 static struct cmd clone_cmds[] = {
174 DEF_CLONE_CMD("create", 0, clone_create),
175 DEF_CMD("destroy", 0, clone_destroy),
176 DEF_CLONE_CMD("plumb", 0, clone_create),
177 DEF_CMD("unplumb", 0, clone_destroy),
181 clone_Copt_cb(const char *optarg __unused)
186 static struct option clone_Copt = { .opt = "C", .opt_usage = "[-C]", .cb = clone_Copt_cb };
188 static __constructor void
193 for (i = 0; i < nitems(clone_cmds); i++)
194 cmd_register(&clone_cmds[i]);
195 opt_register(&clone_Copt);