]>
git.saurik.com Git - apple/network_cmds.git/blob - ifconfig.tproj/ifclone.c
f6b8c072ea463b01826834fa7b60c6b87eb9f952
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/types.h>
31 #include <sys/ioctl.h>
32 #include <sys/socket.h>
46 struct if_clonereq ifcr
;
51 s
= socket(AF_INET
, SOCK_DGRAM
, 0);
53 err(1, "socket(AF_INET,SOCK_DGRAM)");
55 memset(&ifcr
, 0, sizeof(ifcr
));
57 if (ioctl(s
, SIOCIFGCLONERS
, &ifcr
) < 0)
58 err(1, "SIOCIFGCLONERS for count");
60 buf
= malloc(ifcr
.ifcr_total
* IFNAMSIZ
);
62 err(1, "unable to allocate cloner name buffer");
64 ifcr
.ifcr_count
= ifcr
.ifcr_total
;
65 ifcr
.ifcr_buffer
= buf
;
67 if (ioctl(s
, SIOCIFGCLONERS
, &ifcr
) < 0)
68 err(1, "SIOCIFGCLONERS for names");
71 * In case some disappeared in the mean time, clamp it down.
73 if (ifcr
.ifcr_count
> ifcr
.ifcr_total
)
74 ifcr
.ifcr_count
= ifcr
.ifcr_total
;
76 for (cp
= buf
, idx
= 0; idx
< ifcr
.ifcr_count
; idx
++, cp
+= IFNAMSIZ
) {
86 static clone_callback_func
*clone_cb
= NULL
;
89 clone_setcallback(clone_callback_func
*p
)
91 if (clone_cb
!= NULL
&& clone_cb
!= p
)
92 errx(1, "conflicting device create parameters");
97 * Do the actual clone operation. Any parameters must have been
98 * setup by now. If a callback has been setup to do the work
99 * then defer to it; otherwise do a simple create operation with
103 ifclonecreate(int s
, void *arg
)
107 memset(&ifr
, 0, sizeof(ifr
));
108 (void) strlcpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
109 if (clone_cb
== NULL
) {
111 /* NB: no parameters */
112 if (ioctl(s
, SIOCIFCREATE2
, &ifr
) < 0)
113 err(1, "SIOCIFCREATE2");
115 if (ioctl(s
, SIOCIFCREATE
, &ifr
) < 0)
116 err(1, "SIOCIFCREATE");
123 * If we get a different name back than we put in, print it.
125 if (strncmp(name
, ifr
.ifr_name
, sizeof(name
)) != 0) {
126 strlcpy(name
, ifr
.ifr_name
, sizeof(name
));
127 printf("%s\n", name
);
132 DECL_CMD_FUNC(clone_create
, arg
, d
)
134 callback_register(ifclonecreate
, NULL
);
138 DECL_CMD_FUNC(clone_destroy
, arg
, d
)
140 (void) strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
141 if (ioctl(s
, SIOCIFDESTROY
, &ifr
) < 0)
142 err(1, "SIOCIFDESTROY");
145 static struct cmd clone_cmds
[] = {
146 DEF_CLONE_CMD("create", 0, clone_create
),
147 DEF_CMD("destroy", 0, clone_destroy
),
148 DEF_CLONE_CMD("plumb", 0, clone_create
),
149 DEF_CMD("unplumb", 0, clone_destroy
),
153 clone_Copt_cb(const char *optarg __unused
)
158 static struct option clone_Copt
= { "C", "[-C]", clone_Copt_cb
};
160 static __constructor
void
163 #define N(a) (sizeof(a) / sizeof(a[0]))
166 for (i
= 0; i
< N(clone_cmds
); i
++)
167 cmd_register(&clone_cmds
[i
]);
168 opt_register(&clone_Copt
);