Watt-32 tcp/ip  2.2 dev-rel.10
in_var.h
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1 
5 /*
6  * Copyright (c) 1985, 1986, 1993
7  * The Regents of the University of California. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  * must display the following acknowledgement:
19  * This product includes software developed by the University of
20  * California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  * @(#)in_var.h 8.2 (Berkeley) 1/9/95
38  * $Id: in_var.h,v 1.17 1996/03/14 16:59:19 fenner Exp $
39  */
40 
41 #ifndef __NETINET_IN_VAR_H
42 #define __NETINET_IN_VAR_H
43 
44 #include <sys/queue.h>
45 
46 /*
47  * Interface address, Internet version. One of these structures
48  * is allocated for each interface with an Internet address.
49  * The ifaddr structure contains the protocol-independent part
50  * of the structure and is assumed to be first.
51  */
52 struct in_ifaddr {
53  struct ifaddr ia_ifa; /* protocol-independent info */
54 #define ia_ifp ia_ifa.ifa_ifp
55 #define ia_flags ia_ifa.ifa_flags
56  /* ia_{,sub}net{,mask} in host order */
57  u_long ia_net; /* network number of interface */
58  u_long ia_netmask; /* mask of net part */
59  u_long ia_subnet; /* subnet number, including net */
60  u_long ia_subnetmask; /* mask of subnet part */
61  struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
62  struct in_ifaddr *ia_next; /* next in list of internet addresses */
63  struct sockaddr_in ia_addr; /* reserve space for interface name */
64  struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
65 #define ia_broadaddr ia_dstaddr
66  struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
67  LIST_HEAD(in_multihead, in_multi) ia_multiaddrs;
68  /* list of multicast addresses */
69 };
70 
71 struct in_aliasreq {
72  char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
73  struct sockaddr_in ifra_addr;
74  struct sockaddr_in ifra_broadaddr;
75 #define ifra_dstaddr ifra_broadaddr
76  struct sockaddr_in ifra_mask;
77 };
78 /*
79  * Given a pointer to an in_ifaddr (ifaddr),
80  * return a pointer to the addr as a sockaddr_in.
81  */
82 #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
83 #define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
84 
85 #define IN_LNAOF(in, ifa) \
86  ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
87 
88 
89 /*
90  * This information should be part of the ifnet structure but we don't wish
91  * to change that - as it might break a number of things
92  */
93 
94 struct router_info {
95  struct ifnet *rti_ifp;
96  int rti_type; /* type of router which is querier on this interface */
97  int rti_time; /* # of slow timeouts since last old query */
98  struct router_info *rti_next;
99 };
100 
101 /*
102  * Internet multicast address structure. There is one of these for each IP
103  * multicast group to which this host belongs on a given network interface.
104  * They are kept in a linked list, rooted in the interface's in_ifaddr
105  * structure.
106  */
107 struct in_multi {
108  LIST_ENTRY(in_multi) inm_entry; /* list glue */
109  struct in_addr inm_addr; /* IP multicast address */
110  struct ifnet *inm_ifp; /* back pointer to ifnet */
111  struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */
112  u_int inm_refcount; /* no. membership claims by sockets */
113  u_int inm_timer; /* IGMP membership report timer */
114  u_int inm_state; /* state of the membership */
115  struct router_info *inm_rti; /* router info*/
116 };
117 
118 #endif
Definition: in.h:146
Definition: if.h:130
Definition: if.h:249