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>
44 #include <libifconfig.h>
60 ifconfig_handle_t *lifh;
64 lifh = ifconfig_open();
68 if (ifconfig_list_cloners(lifh, &cloners, &cloners_count) < 0)
69 errc(1, ifconfig_err_errno(lifh), "unable to list cloners");
72 for (const char *name = cloners;
73 name < cloners + cloners_count * IFNAMSIZ;
85 char ifprefix[IFNAMSIZ];
86 clone_match_func *ifmatch;
88 clone_match_type clone_mt;
89 clone_callback_func *clone_cb;
90 SLIST_ENTRY(clone_defcb) next;
93 static SLIST_HEAD(, clone_defcb) clone_defcbh =
94 SLIST_HEAD_INITIALIZER(clone_defcbh);
97 clone_setdefcallback_prefix(const char *ifprefix, clone_callback_func *p)
99 struct clone_defcb *dcp;
101 dcp = malloc(sizeof(*dcp));
102 strlcpy(dcp->ifprefix, ifprefix, IFNAMSIZ-1);
103 dcp->clone_mt = MT_PREFIX;
105 SLIST_INSERT_HEAD(&clone_defcbh, dcp, next);
109 clone_setdefcallback_filter(clone_match_func *filter, clone_callback_func *p)
111 struct clone_defcb *dcp;
113 dcp = malloc(sizeof(*dcp));
114 dcp->ifmatch = filter;
115 dcp->clone_mt = MT_FILTER;
117 SLIST_INSERT_HEAD(&clone_defcbh, dcp, next);
121 * Do the actual clone operation. Any parameters must have been
122 * setup by now. If a callback has been setup to do the work
123 * then defer to it; otherwise do a simple create operation with
127 ifclonecreate(int s, void *arg)
130 struct clone_defcb *dcp;
131 clone_callback_func *clone_cb = NULL;
133 memset(&ifr, 0, sizeof(ifr));
134 (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
136 if (clone_cb == NULL) {
137 /* Try to find a default callback */
138 SLIST_FOREACH(dcp, &clone_defcbh, next) {
139 if ((dcp->clone_mt == MT_PREFIX) &&
140 (strncmp(dcp->ifprefix, ifr.ifr_name,
141 strlen(dcp->ifprefix)) == 0)) {
142 clone_cb = dcp->clone_cb;
145 if ((dcp->clone_mt == MT_FILTER) &&
146 dcp->ifmatch(ifr.ifr_name)) {
147 clone_cb = dcp->clone_cb;
152 if (clone_cb == NULL) {
153 /* NB: no parameters */
154 ioctl_ifcreate(s, &ifr);
160 * If we get a different name back than we put in, update record and
161 * indicate it should be printed later.
163 if (strncmp(name, ifr.ifr_name, sizeof(name)) != 0) {
164 strlcpy(name, ifr.ifr_name, sizeof(name));
170 DECL_CMD_FUNC(clone_create, arg, d)
172 callback_register(ifclonecreate, NULL);
176 DECL_CMD_FUNC(clone_destroy, arg, d)
178 (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
179 if (ioctl(s, SIOCIFDESTROY, &ifr) < 0)
180 err(1, "SIOCIFDESTROY");
183 static struct cmd clone_cmds[] = {
184 DEF_CLONE_CMD("create", 0, clone_create),
185 DEF_CMD("destroy", 0, clone_destroy),
186 DEF_CLONE_CMD("plumb", 0, clone_create),
187 DEF_CMD("unplumb", 0, clone_destroy),
191 clone_Copt_cb(const char *optarg __unused)
196 static struct option clone_Copt = { .opt = "C", .opt_usage = "[-C]", .cb = clone_Copt_cb };
198 static __constructor void
203 for (i = 0; i < nitems(clone_cmds); i++)
204 cmd_register(&clone_cmds[i]);
205 opt_register(&clone_Copt);