2 * Copyright (c) 1982, 1986, 1991, 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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)in.c 8.2 (Berkeley) 11/15/93
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/ioctl.h>
39 #include <sys/errno.h>
40 #include <sys/malloc.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
43 #include <sys/queue.h>
46 #include <net/route.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/in.h>
50 #include <netinet/in_var.h>
51 #include <netinet/if_ether.h>
53 #include <netinet/igmp_var.h>
56 * This structure is used to keep track of in_multi chains which belong to
57 * deleted interface addresses.
60 static LIST_HEAD(in_mk_type
, multi_kludge
) in_mk
; /* XXX BSS initialization */
64 LIST_ENTRY(multi_kludge
) mk_entry
;
66 struct in_multihead mk_head
;
69 #ifndef SUBNETSARELOCAL
70 #define SUBNETSARELOCAL 1
72 int subnetsarelocal
= SUBNETSARELOCAL
;
74 * Return 1 if an internet address is for a ``local'' host
75 * (one to which we have a connection). If subnetsarelocal
76 * is true, this includes other subnets of the local net.
77 * Otherwise, it includes only the directly-connected (sub)nets.
83 register u_long i
= ntohl(in
.s_addr
);
84 register struct in_ifaddr
*ia
;
86 if (subnetsarelocal
) {
87 for (ia
= in_ifaddr
; ia
; ia
= ia
->ia_next
)
88 if ((i
& ia
->ia_netmask
) == ia
->ia_net
)
91 for (ia
= in_ifaddr
; ia
; ia
= ia
->ia_next
)
92 if ((i
& ia
->ia_subnetmask
) == ia
->ia_subnet
)
98 int in_interfaces
; /* number of external internet interfaces */
101 * Generic internet control operations (ioctl's).
102 * Ifp is 0 if not an interface-specific ioctl.
106 in_control(so
, cmd
, data
, ifp
)
110 register struct ifnet
*ifp
;
116 * Delete a multicast address record.
120 register struct in_multi
*inm
;
123 register struct in_multi
**p
;
127 if (--inm
->inm_refcount
== 0) {
129 * No remaining claims to this record; let IGMP know that
130 * we are leaving the multicast group.
132 /* igmp_leavegroup(inm); XXX arty */
136 LIST_REMOVE(inm
, inm_entry
);
139 * Notify the network driver to update its multicast reception
142 ((struct sockaddr_in
*)&(ifr
.ifr_addr
))->sin_family
= AF_INET
;
143 ((struct sockaddr_in
*)&(ifr
.ifr_addr
))->sin_addr
=
145 (*inm
->inm_ifp
->if_ioctl
)(inm
->inm_ifp
, SIOCDELMULTI
,
147 free(inm
, M_IPMADDR
);