244 lines
8.3 KiB
C
244 lines
8.3 KiB
C
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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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* $FreeBSD: src/sys/netinet/in_var.h,v 1.45 2002/03/24 10:19:10 bde Exp $
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*/
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#ifndef _NETINET_IN_VAR_H_
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#define _NETINET_IN_VAR_H_
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#include <sys/queue.h>
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#include <sys/fnv_hash.h>
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/*
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* Interface address, Internet version. One of these structures
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* is allocated for each Internet address on an interface.
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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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LIST_ENTRY(in_ifaddr) ia_hash; /* entry in bucket of inet addresses */
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TAILQ_ENTRY(in_ifaddr) ia_link; /* 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 IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
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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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#ifdef _KERNEL
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extern struct ifqueue ipintrq; /* ip packet input queue */
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extern struct in_addr zeroin_addr;
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extern u_char inetctlerrmap[];
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/*
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* Hash table for IP addresses.
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*/
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extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr) *in_ifaddrhashtbl;
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extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead;
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extern u_long in_ifaddrhmask; /* mask for hash table */
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#define INADDR_NHASH_LOG2 9
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#define INADDR_NHASH (1 << INADDR_NHASH_LOG2)
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#define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT)
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#define INADDR_HASH(x) \
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(&in_ifaddrhashtbl[INADDR_HASHVAL(x) & in_ifaddrhmask])
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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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#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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struct in_ifaddr *ia; \
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\
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LIST_FOREACH(ia, INADDR_HASH((addr).s_addr), ia_hash) \
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if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
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break; \
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(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
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}
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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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#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) = TAILQ_FIRST(&in_ifaddrhead); \
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(ia) != NULL && (ia)->ia_ifp != (ifp); \
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(ia) = TAILQ_NEXT((ia), ia_link)) \
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continue; \
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}
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#endif
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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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* For every entry on the interface's if_multiaddrs list which represents
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* an IP multicast group, there is one of these structures. They are also
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* kept on a system-wide list to make it easier to keep our legacy IGMP code
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* compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
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*/
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struct in_multi {
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LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
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struct in_addr inm_addr; /* IP multicast address, convenience */
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struct ifnet *inm_ifp; /* back pointer to ifnet */
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struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */
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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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};
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#ifdef _KERNEL
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_net_inet_ip);
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SYSCTL_DECL(_net_inet_raw);
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#endif
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extern LIST_HEAD(in_multihead, in_multi) in_multihead;
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/*
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* Structure used by macros below to remember position when stepping through
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* all of the in_multi records.
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*/
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struct in_multistep {
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struct in_multi *i_inm;
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};
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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" is set null.
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*/
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#define IN_LOOKUP_MULTI(addr, ifp, inm) \
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/* struct in_addr addr; */ \
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/* struct ifnet *ifp; */ \
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/* struct in_multi *inm; */ \
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do { \
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struct ifmultiaddr *ifma; \
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\
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TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \
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if (ifma->ifma_addr->sa_family == AF_INET \
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&& ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \
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(addr).s_addr) \
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break; \
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} \
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(inm) = ifma ? ifma->ifma_protospec : 0; \
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} while(0)
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/*
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* Macro to step through all of the in_multi records, one at a time.
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* The current position is remembered in "step", which the caller must
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* provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
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* and get the first record. Both macros return a NULL "inm" when there
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* are no remaining records.
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*/
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#define IN_NEXT_MULTI(step, inm) \
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/* struct in_multistep step; */ \
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/* struct in_multi *inm; */ \
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do { \
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if (((inm) = (step).i_inm) != NULL) \
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(step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
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} while(0)
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#define IN_FIRST_MULTI(step, inm) \
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/* struct in_multistep step; */ \
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/* struct in_multi *inm; */ \
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do { \
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(step).i_inm = LIST_FIRST(&in_multihead); \
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IN_NEXT_MULTI((step), (inm)); \
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} while(0)
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struct route;
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struct in_multi *in_addmulti(struct in_addr *, struct ifnet *);
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void in_delmulti(struct in_multi *);
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int in_control(struct socket *, u_long, caddr_t, struct ifnet *,
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struct thread *);
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void in_rtqdrain(void);
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void ip_input(struct mbuf *);
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int in_ifadown(struct ifaddr *ifa, int);
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void in_ifscrub(struct ifnet *, struct in_ifaddr *);
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int ipflow_fastforward(struct mbuf *);
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void ipflow_create(const struct route *, struct mbuf *);
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void ipflow_slowtimo(void);
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#endif /* _KERNEL */
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/* INET6 stuff */
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#include <netinet6/in6_var.h>
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#endif /* _NETINET_IN_VAR_H_ */
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