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+/*
+ * Copyright (c) 1985, 1986, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)in_var.h 8.2 (Berkeley) 1/9/95
+ * $Id$
+ */
+
+#ifndef _NETINET_IN_VAR_H_
+#define _NETINET_IN_VAR_H_
+
+#include <sys/queue.h>
+
+/*
+ * Interface address, Internet version. One of these structures
+ * is allocated for each interface with an Internet address.
+ * The ifaddr structure contains the protocol-independent part
+ * of the structure and is assumed to be first.
+ */
+struct in_ifaddr {
+ struct ifaddr ia_ifa; /* protocol-independent info */
+#define ia_ifp ia_ifa.ifa_ifp
+#define ia_flags ia_ifa.ifa_flags
+ /* ia_{,sub}net{,mask} in host order */
+ u_long ia_net; /* network number of interface */
+ u_long ia_netmask; /* mask of net part */
+ u_long ia_subnet; /* subnet number, including net */
+ u_long ia_subnetmask; /* mask of subnet part */
+ struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
+ struct in_ifaddr *ia_next; /* next in list of internet addresses */
+ struct sockaddr_in ia_addr; /* reserve space for interface name */
+ struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
+#define ia_broadaddr ia_dstaddr
+ struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
+ LIST_HEAD(in_multihead, in_multi) ia_multiaddrs;
+ /* list of multicast addresses */
+};
+
+struct in_aliasreq {
+ char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
+ struct sockaddr_in ifra_addr;
+ struct sockaddr_in ifra_broadaddr;
+#define ifra_dstaddr ifra_broadaddr
+ struct sockaddr_in ifra_mask;
+};
+/*
+ * Given a pointer to an in_ifaddr (ifaddr),
+ * return a pointer to the addr as a sockaddr_in.
+ */
+#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
+#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
+
+#define IN_LNAOF(in, ifa) \
+ ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
+
+
+#ifdef KERNEL
+extern struct in_ifaddr *in_ifaddr;
+extern struct ifqueue ipintrq; /* ip packet input queue */
+extern struct in_addr zeroin_addr;
+extern u_char inetctlerrmap[];
+extern int rtq_reallyold; /* XXX */
+extern int rtq_minreallyold; /* XXX */
+extern int rtq_toomany; /* XXX */
+
+/*
+ * Macro for finding the interface (ifnet structure) corresponding to one
+ * of our IP addresses.
+ */
+#define INADDR_TO_IFP(addr, ifp) \
+ /* struct in_addr addr; */ \
+ /* struct ifnet *ifp; */ \
+{ \
+ register struct in_ifaddr *ia; \
+\
+ for (ia = in_ifaddr; \
+ ia != NULL && ((ia->ia_ifp->if_flags & IFF_POINTOPOINT)? \
+ IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \
+ ia = ia->ia_next) \
+ continue; \
+ if (ia == NULL) \
+ for (ia = in_ifaddr; \
+ ia != NULL; \
+ ia = ia->ia_next) \
+ if (ia->ia_ifp->if_flags & IFF_POINTOPOINT && \
+ IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
+ break; \
+ (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
+}
+
+/*
+ * Macro for finding the internet address structure (in_ifaddr) corresponding
+ * to a given interface (ifnet structure).
+ */
+#define IFP_TO_IA(ifp, ia) \
+ /* struct ifnet *ifp; */ \
+ /* struct in_ifaddr *ia; */ \
+{ \
+ for ((ia) = in_ifaddr; \
+ (ia) != NULL && (ia)->ia_ifp != (ifp); \
+ (ia) = (ia)->ia_next) \
+ continue; \
+}
+#endif
+
+/*
+ * This information should be part of the ifnet structure but we don't wish
+ * to change that - as it might break a number of things
+ */
+
+struct router_info {
+ struct ifnet *rti_ifp;
+ int rti_type; /* type of router which is querier on this interface */
+ int rti_time; /* # of slow timeouts since last old query */
+ struct router_info *rti_next;
+};
+
+/*
+ * Internet multicast address structure. There is one of these for each IP
+ * multicast group to which this host belongs on a given network interface.
+ * They are kept in a linked list, rooted in the interface's in_ifaddr
+ * structure.
+ */
+struct in_multi {
+ LIST_ENTRY(in_multi) inm_entry; /* list glue */
+ struct in_addr inm_addr; /* IP multicast address */
+ struct ifnet *inm_ifp; /* back pointer to ifnet */
+ struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */
+ u_int inm_refcount; /* no. membership claims by sockets */
+ u_int inm_timer; /* IGMP membership report timer */
+ u_int inm_state; /* state of the membership */
+ struct router_info *inm_rti; /* router info*/
+};
+
+#ifdef KERNEL
+/*
+ * Structure used by macros below to remember position when stepping through
+ * all of the in_multi records.
+ */
+struct in_multistep {
+ struct in_ifaddr *i_ia;
+ struct in_multi *i_inm;
+};
+
+/*
+ * Macro for looking up the in_multi record for a given IP multicast address
+ * on a given interface. If no matching record is found, "inm" returns NULL.
+ */
+#define IN_LOOKUP_MULTI(addr, ifp, inm) \
+ /* struct in_addr addr; */ \
+ /* struct ifnet *ifp; */ \
+ /* struct in_multi *inm; */ \
+{ \
+ register struct in_ifaddr *ia; \
+\
+ IFP_TO_IA((ifp), ia); \
+ if (ia == NULL) \
+ (inm) = NULL; \
+ else \
+ for ((inm) = ia->ia_multiaddrs.lh_first; \
+ (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \
+ (inm) = inm->inm_entry.le_next) \
+ continue; \
+}
+
+/*
+ * Macro to step through all of the in_multi records, one at a time.
+ * The current position is remembered in "step", which the caller must
+ * provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
+ * and get the first record. Both macros return a NULL "inm" when there
+ * are no remaining records.
+ */
+#define IN_NEXT_MULTI(step, inm) \
+ /* struct in_multistep step; */ \
+ /* struct in_multi *inm; */ \
+{ \
+ if (((inm) = (step).i_inm) != NULL) \
+ (step).i_inm = (inm)->inm_entry.le_next; \
+ else \
+ while ((step).i_ia != NULL) { \
+ (inm) = (step).i_ia->ia_multiaddrs.lh_first; \
+ (step).i_ia = (step).i_ia->ia_next; \
+ if ((inm) != NULL) { \
+ (step).i_inm = (inm)->inm_entry.le_next; \
+ break; \
+ } \
+ } \
+}
+
+#define IN_FIRST_MULTI(step, inm) \
+ /* struct in_multistep step; */ \
+ /* struct in_multi *inm; */ \
+{ \
+ (step).i_ia = in_ifaddr; \
+ (step).i_inm = NULL; \
+ IN_NEXT_MULTI((step), (inm)); \
+}
+
+struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *));
+void in_delmulti __P((struct in_multi *));
+int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *));
+void in_rtqdrain __P((void));
+void ip_input __P((struct mbuf *));
+
+#endif /* KERNEL */
+
+#endif /* _NETINET_IN_VAR_H_ */