258 lines
8.1 KiB
C
258 lines
8.1 KiB
C
/* in_var.h - internet interface variable header file */
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/* Copyright 1984 - 2001 Wind River Systems, Inc. */
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/*
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* Copyright (c) 1985, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_var.h 8.2 (Berkeley) 1/9/95
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*/
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/*
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modification history
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--------------------
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01d,04dec01,rae cleanup
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01c,10oct01,rae merge from truestack (IGMPv2, VIRTUAL)
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01b,05oct97,vin changed in_ifaddr for fast multicasting.
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01a,03mar96,vin created from BSD4.4lite2.
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*/
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#ifndef __INCin_varh
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#define __INCin_varh
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "net/if.h"
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#include "netinet/in_pcb.h"
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#if ((CPU_FAMILY==I960) && (defined __GNUC__))
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#pragma align 1 /* tell gcc960 not to optimize alignments */
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#endif /* CPU_FAMILY==I960 */
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/*
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* Interface address, Internet version. One of these structures
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* is allocated for each interface with an Internet address.
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* The ifaddr structure contains the protocol-independent part
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* of the structure and is assumed to be first.
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*/
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struct in_ifaddr {
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struct ifaddr ia_ifa; /* protocol-independent info */
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#define ia_ifp ia_ifa.ifa_ifp
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#define ia_flags ia_ifa.ifa_flags
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/* ia_{,sub}net{,mask} in host order */
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u_long ia_net; /* network number of interface */
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u_long ia_netmask; /* mask of net part */
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u_long ia_subnet; /* subnet number, including net */
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u_long ia_subnetmask; /* mask of subnet part */
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struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
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struct in_ifaddr *ia_next; /* next in list of internet addresses */
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struct sockaddr_in ia_addr; /* reserve space for interface name */
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struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
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#define ia_broadaddr ia_dstaddr
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struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
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};
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struct in_aliasreq {
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char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct sockaddr_in ifra_addr;
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struct sockaddr_in ifra_broadaddr;
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#define ifra_dstaddr ifra_broadaddr
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struct sockaddr_in ifra_mask;
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};
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/*
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* Given a pointer to an in_ifaddr (ifaddr),
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* return a pointer to the addr as a sockaddr_in.
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*/
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#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
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#define IN_LNAOF(in, ifa) \
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((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
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#ifndef VIRTUAL_STACK
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extern struct in_ifaddr *in_ifaddr;
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#endif /* VIRTUAL_STACK */
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extern struct ifqueue ipintrq; /* ip packet input queue */
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extern u_char inetctlerrmap[];
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extern void in_socktrim (struct sockaddr_in *);
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/*
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* Macro for finding the interface (ifnet structure) corresponding to one
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* of our IP addresses.
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*/
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#ifdef VIRTUAL_STACK
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#define INADDR_TO_IFP(addr, ifp) \
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/* struct in_addr addr; */ \
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/* struct ifnet *ifp; */ \
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{ \
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register struct in_ifaddr *ia; \
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\
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for (ia = _in_ifaddr; \
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ia != NULL && IA_SIN(ia)->sin_addr.s_addr != (addr).s_addr; \
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ia = ia->ia_next) \
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continue; \
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(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
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}
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#else
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#define INADDR_TO_IFP(addr, ifp) \
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/* struct in_addr addr; */ \
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/* struct ifnet *ifp; */ \
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{ \
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register struct in_ifaddr *ia; \
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\
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for (ia = in_ifaddr; \
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ia != NULL && IA_SIN(ia)->sin_addr.s_addr != (addr).s_addr; \
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ia = ia->ia_next) \
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continue; \
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(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
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}
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#endif /* VIRTUAL_STACK */
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/*
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* Macro for finding the internet address structure (in_ifaddr) corresponding
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* to a given interface (ifnet structure).
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*/
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#ifdef VIRTUAL_STACK
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#define IFP_TO_IA(ifp, ia) \
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/* struct ifnet *ifp; */ \
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/* struct in_ifaddr *ia; */ \
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{ \
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for ((ia) = _in_ifaddr; \
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(ia) != NULL && (ia)->ia_ifp != (ifp); \
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(ia) = (ia)->ia_next) \
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continue; \
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}
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#else
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#define IFP_TO_IA(ifp, ia) \
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/* struct ifnet *ifp; */ \
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/* struct in_ifaddr *ia; */ \
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{ \
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for ((ia) = in_ifaddr; \
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(ia) != NULL && (ia)->ia_ifp != (ifp); \
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(ia) = (ia)->ia_next) \
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continue; \
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}
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#endif /* VIRTUAL_STACK */
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LIST_HEAD(inMultiHead, in_multi);
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/*
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* This information should be part of the ifnet structure but we don't wish
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* to change that - as it might break a number of things
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*/
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struct router_info {
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struct ifnet *rti_ifp;
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int rti_type; /* type of router which is querier on this interface */
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int rti_time; /* # of slow timeouts since last old query */
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struct router_info *rti_next;
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};
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/*
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* Internet multicast address structure. There is one of these for each IP
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* multicast group to which this host belongs on a given network interface.
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* They are kept in a linked list, rooted in the interface's in_ifaddr
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* structure. (now it is a "hash list")
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*/
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struct in_multi {
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LIST_ENTRY(in_multi) inm_hash; /* hash list */
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struct in_addr inm_addr; /* IP multicast address */
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struct ifnet *inm_ifp; /* back pointer to ifnet */
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u_int inm_refcount; /* no. membership claims by sockets */
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u_int inm_timer; /* IGMP membership report timer */
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u_int inm_state; /* state of the membership */
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struct router_info *inm_rti; /* router info*/
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struct mBlk * pInPcbMblk; /* chain of pcbs */
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};
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struct mcastHashInfo
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{
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struct inMultiHead * hashBase;
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ULONG hashMask;
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};
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typedef struct in_multi IN_MULTI;
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typedef struct mcastHashInfo M_CAST_HASH_INFO;
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typedef struct inMultiHead IN_MULTI_HEAD;
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extern struct mcastHashInfo mCastHashInfo;
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/* necessary macros */
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#define MCAST_HASH(mCastAddr, ifp, mask) \
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(((mCastAddr) ^ ((mCastAddr) >> 16) ^ (int)(ifp)) & (mask))
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/*
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* Macro for looking up the in_multi record for a given IP multicast address
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* on a given interface. If no matching record is found, "inm" returns NULL.
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*/
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#define IN_LOOKUP_MULTI(addr, ifp, inm) \
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{ \
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(inm) = mcastHashTblLookup ((addr).s_addr, (ifp)); \
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}
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#if ((CPU_FAMILY==I960) && (defined __GNUC__))
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#pragma align 0 /* turn off alignment requirement */
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#endif /* CPU_FAMILY==I960 */
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extern int in_ifinit (struct ifnet *,
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struct in_ifaddr *, struct sockaddr_in *, int);
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extern struct mBlk * in_addmulti (struct in_addr *, struct ifnet *,
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struct inpcb *);
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extern int in_delmulti (struct mBlk *, struct inpcb *);
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extern void in_ifscrub (struct ifnet *, struct in_ifaddr *);
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extern int in_control (struct socket *, u_long, caddr_t, struct ifnet *);
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IMPORT STATUS mcastHashTblInsert (struct in_multi * pInMulti);
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IMPORT STATUS mcastHashTblDelete (struct in_multi * pInMulti);
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IMPORT IN_MULTI * mcastHashTblLookup (int mcastAddr, struct ifnet * pIf);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCin_varh */
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