in_var.h revision 7090
155714Skris/* 255714Skris * Copyright (c) 1985, 1986, 1993 355714Skris * The Regents of the University of California. All rights reserved. 455714Skris * 555714Skris * Redistribution and use in source and binary forms, with or without 655714Skris * modification, are permitted provided that the following conditions 755714Skris * are met: 855714Skris * 1. Redistributions of source code must retain the above copyright 955714Skris * notice, this list of conditions and the following disclaimer. 1055714Skris * 2. Redistributions in binary form must reproduce the above copyright 1155714Skris * notice, this list of conditions and the following disclaimer in the 1255714Skris * documentation and/or other materials provided with the distribution. 1355714Skris * 3. All advertising materials mentioning features or use of this software 1455714Skris * must display the following acknowledgement: 1555714Skris * This product includes software developed by the University of 1655714Skris * California, Berkeley and its contributors. 1755714Skris * 4. Neither the name of the University nor the names of its contributors 1855714Skris * may be used to endorse or promote products derived from this software 1955714Skris * without specific prior written permission. 2055714Skris * 2155714Skris * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155714Skris * SUCH DAMAGE. 3255714Skris * 3355714Skris * @(#)in_var.h 8.1 (Berkeley) 6/10/93 3455714Skris * $Id: in_var.h,v 1.7 1994/10/25 22:13:32 swallace Exp $ 3555714Skris */ 3655714Skris 3755714Skris#ifndef _NETINET_IN_VAR_H_ 3855714Skris#define _NETINET_IN_VAR_H_ 3955714Skris 4055714Skris/* 4155714Skris * Interface address, Internet version. One of these structures 4255714Skris * is allocated for each interface with an Internet address. 4355714Skris * The ifaddr structure contains the protocol-independent part 4455714Skris * of the structure and is assumed to be first. 4555714Skris */ 4655714Skrisstruct in_ifaddr { 4755714Skris struct ifaddr ia_ifa; /* protocol-independent info */ 4855714Skris#define ia_ifp ia_ifa.ifa_ifp 4955714Skris#define ia_flags ia_ifa.ifa_flags 5055714Skris /* ia_{,sub}net{,mask} in host order */ 5155714Skris u_long ia_net; /* network number of interface */ 5255714Skris u_long ia_netmask; /* mask of net part */ 5355714Skris u_long ia_subnet; /* subnet number, including net */ 5455714Skris u_long ia_subnetmask; /* mask of subnet part */ 5555714Skris struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 5655714Skris struct in_ifaddr *ia_next; /* next in list of internet addresses */ 5755714Skris struct sockaddr_in ia_addr; /* reserve space for interface name */ 5855714Skris struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 5955714Skris#define ia_broadaddr ia_dstaddr 6055714Skris struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 6168651Skris struct in_multi *ia_multiaddrs; /* list of multicast addresses */ 6268651Skris}; 6368651Skris 6468651Skrisstruct in_aliasreq { 6555714Skris char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 6655714Skris struct sockaddr_in ifra_addr; 6755714Skris struct sockaddr_in ifra_broadaddr; 6855714Skris#define ifra_dstaddr ifra_broadaddr 6955714Skris struct sockaddr_in ifra_mask; 7055714Skris}; 7155714Skris/* 7255714Skris * Given a pointer to an in_ifaddr (ifaddr), 7355714Skris * return a pointer to the addr as a sockaddr_in. 7455714Skris */ 7555714Skris#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 7655714Skris#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) 7755714Skris 7855714Skris#define IN_LNAOF(in, ifa) \ 7955714Skris ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) 8055714Skris 8155714Skris 8255714Skris#ifdef KERNEL 8355714Skrisextern struct in_ifaddr *in_ifaddr; 8455714Skrisextern struct ifqueue ipintrq; /* ip packet input queue */ 8555714Skrisextern struct in_addr zeroin_addr; 8655714Skrisextern u_char inetctlerrmap[]; 8755714Skrisextern int rtq_reallyold; /* XXX */ 8855714Skrisextern int rtq_minreallyold; /* XXX */ 8955714Skrisextern int rtq_toomany; /* XXX */ 9055714Skris 9155714Skris/* 9255714Skris * Macro for finding the interface (ifnet structure) corresponding to one 9355714Skris * of our IP addresses. 9455714Skris */ 9555714Skris#define INADDR_TO_IFP(addr, ifp) \ 9655714Skris /* struct in_addr addr; */ \ 9755714Skris /* struct ifnet *ifp; */ \ 9855714Skris{ \ 9955714Skris register struct in_ifaddr *ia; \ 10055714Skris\ 10155714Skris for (ia = in_ifaddr; \ 10255714Skris ia != NULL && ((ia->ia_ifp->if_flags & IFF_POINTOPOINT)? \ 10355714Skris IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \ 10455714Skris ia = ia->ia_next) \ 10555714Skris continue; \ 10655714Skris (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 10755714Skris} 10855714Skris 10955714Skris/* 11055714Skris * Macro for finding the internet address structure (in_ifaddr) corresponding 11155714Skris * to a given interface (ifnet structure). 11255714Skris */ 11355714Skris#define IFP_TO_IA(ifp, ia) \ 11455714Skris /* struct ifnet *ifp; */ \ 11555714Skris /* struct in_ifaddr *ia; */ \ 11655714Skris{ \ 11755714Skris for ((ia) = in_ifaddr; \ 11855714Skris (ia) != NULL && (ia)->ia_ifp != (ifp); \ 11955714Skris (ia) = (ia)->ia_next) \ 12055714Skris continue; \ 12155714Skris} 12255714Skris#endif 12355714Skris 12455714Skris/* 12555714Skris * This information should be part of the ifnet structure but we don't wish 12655714Skris * to change that - as it might break a number of things 12755714Skris */ 12855714Skris 12955714Skrisstruct router_info { 13055714Skris struct ifnet *ifp; 13155714Skris int type; /* type of router which is querier on this interface */ 13255714Skris int time; /* # of slow timeouts since last old query */ 13355714Skris struct router_info *next; 13468651Skris}; 13568651Skris 13655714Skris/* 13755714Skris * Internet multicast address structure. There is one of these for each IP 13855714Skris * multicast group to which this host belongs on a given network interface. 13955714Skris * They are kept in a linked list, rooted in the interface's in_ifaddr 14055714Skris * structure. 14155714Skris */ 14255714Skrisstruct in_multi { 14355714Skris struct in_addr inm_addr; /* IP multicast address */ 14455714Skris struct ifnet *inm_ifp; /* back pointer to ifnet */ 14555714Skris struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */ 14655714Skris u_int inm_refcount; /* no. membership claims by sockets */ 14755714Skris u_int inm_timer; /* IGMP membership report timer */ 14855714Skris struct in_multi *inm_next; /* ptr to next multicast address */ 14955714Skris u_int inm_state; /* state of the membership */ 15055714Skris struct router_info *inm_rti; /* router info*/ 15155714Skris}; 15255714Skris 15355714Skris#ifdef KERNEL 15459191Skris/* 15559191Skris * Structure used by macros below to remember position when stepping through 15659191Skris * all of the in_multi records. 15759191Skris */ 15859191Skrisstruct in_multistep { 15955714Skris struct in_ifaddr *i_ia; 16055714Skris struct in_multi *i_inm; 16155714Skris}; 16255714Skris 16355714Skris/* 16455714Skris * Macro for looking up the in_multi record for a given IP multicast address 16555714Skris * on a given interface. If no matching record is found, "inm" returns NULL. 16655714Skris */ 16755714Skris#define IN_LOOKUP_MULTI(addr, ifp, inm) \ 16855714Skris /* struct in_addr addr; */ \ 16955714Skris /* struct ifnet *ifp; */ \ 17055714Skris /* struct in_multi *inm; */ \ 17155714Skris{ \ 17255714Skris register struct in_ifaddr *ia; \ 17355714Skris\ 17455714Skris IFP_TO_IA((ifp), ia); \ 17555714Skris if (ia == NULL) \ 17655714Skris (inm) = NULL; \ 17755714Skris else \ 17859191Skris for ((inm) = ia->ia_multiaddrs; \ 17959191Skris (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ 18055714Skris (inm) = inm->inm_next) \ 18155714Skris continue; \ 18255714Skris} 18359191Skris 18459191Skris/* 18559191Skris * Macro to step through all of the in_multi records, one at a time. 18659191Skris * The current position is remembered in "step", which the caller must 18759191Skris * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 18855714Skris * and get the first record. Both macros return a NULL "inm" when there 18955714Skris * are no remaining records. 19055714Skris */ 19159191Skris#define IN_NEXT_MULTI(step, inm) \ 19259191Skris /* struct in_multistep step; */ \ 19359191Skris /* struct in_multi *inm; */ \ 19455714Skris{ \ 19555714Skris if (((inm) = (step).i_inm) != NULL) \ 19655714Skris (step).i_inm = (inm)->inm_next; \ 19759191Skris else \ 19855714Skris while ((step).i_ia != NULL) { \ 19955714Skris (inm) = (step).i_ia->ia_multiaddrs; \ 20055714Skris (step).i_ia = (step).i_ia->ia_next; \ 20155714Skris if ((inm) != NULL) { \ 20255714Skris (step).i_inm = (inm)->inm_next; \ 20355714Skris break; \ 20455714Skris } \ 20555714Skris } \ 20655714Skris} 20755714Skris 20855714Skris#define IN_FIRST_MULTI(step, inm) \ 20955714Skris /* struct in_multistep step; */ \ 21055714Skris /* struct in_multi *inm; */ \ 21155714Skris{ \ 21255714Skris (step).i_ia = in_ifaddr; \ 21355714Skris (step).i_inm = NULL; \ 21455714Skris IN_NEXT_MULTI((step), (inm)); \ 21555714Skris} 21655714Skris 21755714Skrisint in_ifinit __P((struct ifnet *, 21855714Skris struct in_ifaddr *, struct sockaddr_in *, int)); 21955714Skrisstruct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); 22055714Skrisvoid in_delmulti __P((struct in_multi *)); 22155714Skrisvoid in_ifscrub __P((struct ifnet *, struct in_ifaddr *)); 22255714Skrisint in_control __P((struct socket *, int, caddr_t, struct ifnet *)); 22355714Skris 22455714Skris#endif 22555714Skris#endif 22655714Skris