1 /* $OpenBSD: in_var.h,v 1.41 2018/10/18 15:23:04 cheloha 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 LIST_ENTRY(router_info) rti_list;
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 *
ifmatoinm(struct ifmaddr * ifma)128 ifmatoinm(struct ifmaddr *ifma)
129 {
130 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_ */
167