1 //==========================================================================
3 // include/netinet/in_var.h
7 //==========================================================================
8 //####BSDCOPYRIGHTBEGIN####
10 // -------------------------------------------
12 // Portions of this software may have been derived from OpenBSD or other sources,
13 // and are covered by the appropriate copyright disclaimers included herein.
15 // -------------------------------------------
17 //####BSDCOPYRIGHTEND####
18 //==========================================================================
19 //#####DESCRIPTIONBEGIN####
22 // Contributors: gthomas
28 //####DESCRIPTIONEND####
30 //==========================================================================
33 /* $OpenBSD: in_var.h,v 1.3 1999/12/08 06:50:19 itojun Exp $ */
34 /* $NetBSD: in_var.h,v 1.16 1996/02/13 23:42:15 christos Exp $ */
37 * Copyright (c) 1985, 1986, 1993
38 * The Regents of the University of California. All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. All advertising materials mentioning features or use of this software
49 * must display the following acknowledgement:
50 * This product includes software developed by the University of
51 * California, Berkeley and its contributors.
52 * 4. Neither the name of the University nor the names of its contributors
53 * may be used to endorse or promote products derived from this software
54 * without specific prior written permission.
56 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
59 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
62 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * @(#)in_var.h 8.1 (Berkeley) 6/10/93
71 #ifndef _NETINET_IN_VAR_H_
72 #define _NETINET_IN_VAR_H_
74 #include <sys/queue.h>
77 * Interface address, Internet version. One of these structures
78 * is allocated for each interface with an Internet address.
79 * The ifaddr structure contains the protocol-independent part
80 * of the structure and is assumed to be first.
83 struct ifaddr ia_ifa; /* protocol-independent info */
84 #define ia_ifp ia_ifa.ifa_ifp
85 #define ia_flags ia_ifa.ifa_flags
86 /* ia_{,sub}net{,mask} in host order */
87 u_int32_t ia_net; /* network number of interface */
88 u_int32_t ia_netmask; /* mask of net part */
89 u_int32_t ia_subnet; /* subnet number, including net */
90 u_int32_t ia_subnetmask; /* mask of subnet part */
91 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
92 TAILQ_ENTRY(in_ifaddr) ia_list; /* list of internet addresses */
93 struct sockaddr_in ia_addr; /* reserve space for interface name */
94 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
95 #define ia_broadaddr ia_dstaddr
96 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
97 LIST_HEAD(, in_multi) ia_multiaddrs; /* list of multicast addresses */
101 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
102 struct sockaddr_in ifra_addr;
103 struct sockaddr_in ifra_dstaddr;
104 #define ifra_broadaddr ifra_dstaddr
105 struct sockaddr_in ifra_mask;
108 * Given a pointer to an in_ifaddr (ifaddr),
109 * return a pointer to the addr as a sockaddr_in.
111 #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
115 TAILQ_HEAD(in_ifaddrhead, in_ifaddr);
116 extern struct in_ifaddrhead in_ifaddr;
117 extern struct ifqueue ipintrq; /* ip packet input queue */
118 extern int inetctlerrmap[];
119 void in_socktrim __P((struct sockaddr_in *));
123 * Macro for finding the interface (ifnet structure) corresponding to one
124 * of our IP addresses.
126 #define INADDR_TO_IFP(addr, ifp) \
127 /* struct in_addr addr; */ \
128 /* struct ifnet *ifp; */ \
130 register struct in_ifaddr *ia; \
132 for (ia = in_ifaddr.tqh_first; \
133 ia != NULL && ia->ia_addr.sin_addr.s_addr != (addr).s_addr; \
134 ia = ia->ia_list.tqe_next) \
136 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
140 * Macro for finding the internet address structure (in_ifaddr) corresponding
141 * to a given interface (ifnet structure).
143 #define IFP_TO_IA(ifp, ia) \
144 /* struct ifnet *ifp; */ \
145 /* struct in_ifaddr *ia; */ \
147 for ((ia) = in_ifaddr.tqh_first; \
148 (ia) != NULL && (ia)->ia_ifp != (ifp); \
149 (ia) = (ia)->ia_list.tqe_next) \
155 * Per-interface router version information.
158 struct ifnet *rti_ifp;
159 int rti_type; /* type of router on this interface */
160 int rti_age; /* time since last v1 query */
161 struct router_info *rti_next;
165 * Internet multicast address structure. There is one of these for each IP
166 * multicast group to which this host belongs on a given network interface.
167 * They are kept in a linked list, rooted in the interface's in_ifaddr
171 struct in_addr inm_addr; /* IP multicast address */
172 struct ifnet *inm_ifp; /* back pointer to ifnet */
173 struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */
174 u_int inm_refcount; /* no. membership claims by sockets */
175 u_int inm_timer; /* IGMP membership report timer */
176 LIST_ENTRY(in_multi) inm_list; /* list of multicast addresses */
177 u_int inm_state; /* state of membership */
178 struct router_info *inm_rti; /* router version info */
183 * Structure used by macros below to remember position when stepping through
184 * all of the in_multi records.
186 struct in_multistep {
187 struct in_ifaddr *i_ia;
188 struct in_multi *i_inm;
192 * Macro for looking up the in_multi record for a given IP multicast address
193 * on a given interface. If no matching record is found, "inm" returns NULL.
195 #define IN_LOOKUP_MULTI(addr, ifp, inm) \
196 /* struct in_addr addr; */ \
197 /* struct ifnet *ifp; */ \
198 /* struct in_multi *inm; */ \
200 register struct in_ifaddr *ia; \
202 IFP_TO_IA((ifp), ia); \
206 for ((inm) = ia->ia_multiaddrs.lh_first; \
207 (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \
208 (inm) = inm->inm_list.le_next) \
213 * Macro to step through all of the in_multi records, one at a time.
214 * The current position is remembered in "step", which the caller must
215 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
216 * and get the first record. Both macros return a NULL "inm" when there
217 * are no remaining records.
219 #define IN_NEXT_MULTI(step, inm) \
220 /* struct in_multistep step; */ \
221 /* struct in_multi *inm; */ \
223 if (((inm) = (step).i_inm) != NULL) \
224 (step).i_inm = (inm)->inm_list.le_next; \
226 while ((step).i_ia != NULL) { \
227 (inm) = (step).i_ia->ia_multiaddrs.lh_first; \
228 (step).i_ia = (step).i_ia->ia_list.tqe_next; \
229 if ((inm) != NULL) { \
230 (step).i_inm = (inm)->inm_list.le_next; \
236 #define IN_FIRST_MULTI(step, inm) \
237 /* struct in_multistep step; */ \
238 /* struct in_multi *inm; */ \
240 (step).i_ia = in_ifaddr.tqh_first; \
241 (step).i_inm = NULL; \
242 IN_NEXT_MULTI((step), (inm)); \
245 int in_ifinit __P((struct ifnet *,
246 struct in_ifaddr *, struct sockaddr_in *, int));
247 struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *));
248 void in_delmulti __P((struct in_multi *));
249 void in_ifscrub __P((struct ifnet *, struct in_ifaddr *));
250 int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *));
255 #include <netinet6/in6_var.h>
257 #endif // _NETINET_IN_VAR_H_