Line data Source code
1 : /* $OpenBSD: in_var.h,v 1.40 2017/05/29 14:36:22 mpi Exp $ */
2 : /* $NetBSD: in_var.h,v 1.16 1996/02/13 23:42:15 christos Exp $ */
3 :
4 : /*
5 : * Copyright (c) 1985, 1986, 1993
6 : * The Regents of the University of California. All rights reserved.
7 : *
8 : * Redistribution and use in source and binary forms, with or without
9 : * modification, are permitted provided that the following conditions
10 : * are met:
11 : * 1. Redistributions of source code must retain the above copyright
12 : * notice, this list of conditions and the following disclaimer.
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : * 3. Neither the name of the University nor the names of its contributors
17 : * may be used to endorse or promote products derived from this software
18 : * without specific prior written permission.
19 : *
20 : * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 : * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 : * SUCH DAMAGE.
31 : *
32 : * @(#)in_var.h 8.1 (Berkeley) 6/10/93
33 : */
34 :
35 : #ifndef _NETINET_IN_VAR_H_
36 : #define _NETINET_IN_VAR_H_
37 :
38 : #include <sys/queue.h>
39 :
40 : #ifdef _KERNEL
41 : /*
42 : * Interface address, Internet version. One of these structures
43 : * is allocated for each interface with an Internet address.
44 : * The ifaddr structure contains the protocol-independent part
45 : * of the structure and is assumed to be first.
46 : */
47 : struct in_ifaddr {
48 : struct ifaddr ia_ifa; /* protocol-independent info */
49 : #define ia_ifp ia_ifa.ifa_ifp
50 : #define ia_flags ia_ifa.ifa_flags
51 : /* ia_net{,mask} in host order */
52 : u_int32_t ia_net; /* network number of interface */
53 : u_int32_t ia_netmask; /* mask of net part */
54 : TAILQ_ENTRY(in_ifaddr) ia_list; /* list of internet addresses */
55 : struct sockaddr_in ia_addr; /* reserve space for interface name */
56 : struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
57 : #define ia_broadaddr ia_dstaddr
58 : struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
59 : struct in_multi *ia_allhosts; /* multicast address record for
60 : the allhosts multicast group */
61 : };
62 : #endif
63 :
64 : struct in_aliasreq {
65 : char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
66 : union {
67 : struct sockaddr_in ifrau_addr;
68 : int ifrau_align;
69 : } ifra_ifrau;
70 : #ifndef ifra_addr
71 : #define ifra_addr ifra_ifrau.ifrau_addr
72 : #endif
73 : struct sockaddr_in ifra_dstaddr;
74 : #define ifra_broadaddr ifra_dstaddr
75 : struct sockaddr_in ifra_mask;
76 : };
77 :
78 :
79 : #ifdef _KERNEL
80 : /*
81 : * Macro for finding the internet address structure (in_ifaddr) corresponding
82 : * to a given interface (ifnet structure).
83 : */
84 : #define IFP_TO_IA(ifp, ia) \
85 : /* struct ifnet *ifp; */ \
86 : /* struct in_ifaddr *ia; */ \
87 : do { \
88 : struct ifaddr *ifa; \
89 : NET_ASSERT_LOCKED(); \
90 : TAILQ_FOREACH(ifa, &(ifp)->if_addrlist, ifa_list) { \
91 : if (ifa->ifa_addr->sa_family == AF_INET) \
92 : break; \
93 : } \
94 : (ia) = ifatoia(ifa); \
95 : } while (/* CONSTCOND */ 0)
96 : #endif
97 :
98 : /*
99 : * Per-interface router version information.
100 : */
101 : struct router_info {
102 : unsigned int rti_ifidx;
103 : int rti_type; /* type of router on this interface */
104 : int rti_age; /* time since last v1 query */
105 : struct router_info *rti_next;
106 : };
107 :
108 : #ifdef _KERNEL
109 : /*
110 : * Internet multicast address structure. There is one of these for each IP
111 : * multicast group to which this host belongs on a given network interface.
112 : */
113 : struct in_multi {
114 : struct ifmaddr inm_ifma; /* Protocol-independent info */
115 : #define inm_refcnt inm_ifma.ifma_refcnt
116 : #define inm_ifidx inm_ifma.ifma_ifidx
117 :
118 : struct sockaddr_in inm_sin; /* IPv4 multicast address */
119 : #define inm_addr inm_sin.sin_addr
120 :
121 : u_int inm_state; /* state of membership */
122 : u_int inm_timer; /* IGMP membership report timer */
123 :
124 : struct router_info *inm_rti; /* router version info */
125 : };
126 :
127 : static __inline struct in_multi *
128 0 : ifmatoinm(struct ifmaddr *ifma)
129 : {
130 0 : return ((struct in_multi *)(ifma));
131 : }
132 :
133 : /*
134 : * Macro for looking up the in_multi record for a given IP multicast
135 : * address on a given interface. If no matching record is found, "inm"
136 : * returns NULL.
137 : */
138 : #define IN_LOOKUP_MULTI(addr, ifp, inm) \
139 : /* struct in_addr addr; */ \
140 : /* struct ifnet *ifp; */ \
141 : /* struct in_multi *inm; */ \
142 : do { \
143 : struct ifmaddr *ifma; \
144 : \
145 : (inm) = NULL; \
146 : NET_ASSERT_LOCKED(); \
147 : TAILQ_FOREACH(ifma, &(ifp)->if_maddrlist, ifma_list) \
148 : if (ifma->ifma_addr->sa_family == AF_INET && \
149 : ifmatoinm(ifma)->inm_addr.s_addr == (addr).s_addr) {\
150 : (inm) = ifmatoinm(ifma); \
151 : break; \
152 : } \
153 : } while (/* CONSTCOND */ 0)
154 :
155 : int in_ifinit(struct ifnet *,
156 : struct in_ifaddr *, struct sockaddr_in *, int);
157 : struct in_multi *in_addmulti(struct in_addr *, struct ifnet *);
158 : void in_delmulti(struct in_multi *);
159 : int in_hasmulti(struct in_addr *, struct ifnet *);
160 : void in_ifscrub(struct ifnet *, struct in_ifaddr *);
161 : int in_control(struct socket *, u_long, caddr_t, struct ifnet *);
162 : int in_ioctl(u_long, caddr_t, struct ifnet *, int);
163 : void in_prefixlen2mask(struct in_addr *, int);
164 : #endif
165 :
166 : #endif /* _NETINET_IN_VAR_H_ */
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