NetBSD/sys/netinet/in_var.h

318 lines
11 KiB
C

/* $NetBSD: in_var.h,v 1.51 2003/11/11 20:25:26 jonathan Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Public Access Networks Corporation ("Panix"). It was developed under
* contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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. 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
*/
#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_int32_t ia_net; /* network number of interface */
u_int32_t ia_netmask; /* mask of net part */
u_int32_t ia_subnet; /* subnet number, including net */
u_int32_t ia_subnetmask; /* mask of subnet part */
struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
LIST_ENTRY(in_ifaddr) ia_hash; /* entry in bucket of inet addresses */
TAILQ_ENTRY(in_ifaddr) ia_list; /* 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_multi) ia_multiaddrs; /* list of multicast addresses */
struct in_multi *ia_allhosts; /* multicast address record for
the allhosts multicast group */
};
struct in_aliasreq {
char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
struct sockaddr_in ifra_addr;
struct sockaddr_in ifra_dstaddr;
#define ifra_broadaddr ifra_dstaddr
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))
#ifdef _KERNEL
#ifndef IN_IFADDR_HASH_SIZE
#define IN_IFADDR_HASH_SIZE 509 /* 61, 127, 251, 509, 1021, 2039 are good */
#endif
#ifndef IN_MULTI_HASH_SIZE
#define IN_MULTI_HASH_SIZE 509 /* 61, 127, 251, 509, 1021, 2039 are good */
#endif
/*
* This is a bit unconventional, and wastes a little bit of space, but
* because we want a very even hash function we don't use & in_ifaddrhash
* here, but rather % the hash size, which should obviously be prime.
*/
#define IN_IFADDR_HASH(x) in_ifaddrhashtbl[(u_long)(x) % IN_IFADDR_HASH_SIZE]
#define IN_MULTI_HASH(x, ifp) \
(in_multihashtbl[(u_long)((x) ^ (ifp->if_index)) % IN_MULTI_HASH_SIZE])
LIST_HEAD(in_ifaddrhashhead, in_ifaddr); /* Type of the hash head */
TAILQ_HEAD(in_ifaddrhead, in_ifaddr); /* Type of the list head */
LIST_HEAD(in_multihashhead, in_multi); /* Type of the hash head */
extern u_long in_ifaddrhash; /* size of hash table - 1 */
extern int in_ifaddrentries; /* total number of addrs */
extern struct in_ifaddrhashhead *in_ifaddrhashtbl; /* Hash table head */
extern struct in_ifaddrhead in_ifaddrhead; /* List head (in ip_input) */
extern u_long in_multihash; /* size of hash table - 1 */
extern int in_multientries; /* total number of addrs */
extern struct in_multihashhead *in_multihashtbl; /* Hash table head */
extern struct ifqueue ipintrq; /* ip packet input queue */
extern const int inetctlerrmap[];
/*
* Macro for finding whether an internet address (in_addr) belongs to one
* of our interfaces (in_ifaddr). NULL if the address isn't ours.
*/
#define INADDR_TO_IA(addr, ia) \
/* struct in_addr addr; */ \
/* struct in_ifaddr *ia; */ \
{ \
LIST_FOREACH(ia, &IN_IFADDR_HASH((addr).s_addr), ia_hash) { \
if (in_hosteq(ia->ia_addr.sin_addr, (addr))) \
break; \
} \
}
/*
* Macro for finding the next in_ifaddr structure with the same internet
* address as ia. Call only with a valid ia pointer.
* Will set ia to NULL if none found.
*/
#define NEXT_IA_WITH_SAME_ADDR(ia) \
/* struct in_ifaddr *ia; */ \
{ \
struct in_addr addr; \
addr = ia->ia_addr.sin_addr; \
do { \
ia = LIST_NEXT(ia, ia_hash); \
} while ((ia != NULL) && !in_hosteq(ia->ia_addr.sin_addr, addr)); \
}
/*
* 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; */ \
{ \
struct in_ifaddr *ia; \
\
INADDR_TO_IA(addr, ia); \
(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
}
/*
* Macro for finding an 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; */ \
{ \
struct ifaddr *ifa; \
\
TAILQ_FOREACH(ifa, &(ifp)->if_addrlist, ifa_list) { \
if (ifa->ifa_addr->sa_family == AF_INET) \
break; \
} \
(ia) = ifatoia(ifa); \
}
#endif
/*
* Per-interface router version information.
*/
struct router_info {
LIST_ENTRY(router_info) rti_link;
struct ifnet *rti_ifp;
int rti_type; /* type of router on this interface */
int rti_age; /* time since last v1 query */
};
/*
* 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_list; /* list of multicast addresses */
struct router_info *inm_rti; /* router version info */
struct ifnet *inm_ifp; /* back pointer to ifnet */
struct in_addr inm_addr; /* IP multicast address */
u_int inm_refcount; /* no. membership claims by sockets */
u_int inm_timer; /* IGMP membership report timer */
u_int inm_state; /* state of membership */
};
#ifdef _KERNEL
/*
* Structure used by macros below to remember position when stepping through
* all of the in_multi records.
*/
struct in_multistep {
int i_n;
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; */ \
{ \
LIST_FOREACH((inm), &IN_MULTI_HASH(((addr).s_addr), (ifp)), inm_list) {\
if (in_hosteq((inm)->inm_addr, (addr)) && \
(inm)->inm_ifp == (ifp)) \
break; \
} \
}
/*
* 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; */ \
{ \
while ((step).i_inm == NULL && (step).i_n < IN_MULTI_HASH_SIZE) \
(step).i_inm = LIST_FIRST(&in_multihashtbl[++(step).i_n]); \
if (((inm) = (step).i_inm) != NULL) \
(step).i_inm = LIST_NEXT((inm), inm_list); \
}
#define IN_FIRST_MULTI(step, inm) \
/* struct in_multistep step; */ \
/* struct in_multi *inm; */ \
{ \
(step).i_n = 0; \
(step).i_inm = LIST_FIRST(&in_multihashtbl[0]); \
IN_NEXT_MULTI((step), (inm)); \
}
struct ifaddr;
int in_ifinit __P((struct ifnet *,
struct in_ifaddr *, struct sockaddr_in *, int));
void in_savemkludge __P((struct in_ifaddr *));
void in_restoremkludge __P((struct in_ifaddr *, struct ifnet *));
void in_purgemkludge __P((struct ifnet *));
struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *));
void in_delmulti __P((struct in_multi *));
void in_ifscrub __P((struct ifnet *, struct in_ifaddr *));
void in_setmaxmtu __P((void));
const char *in_fmtaddr __P((struct in_addr));
int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *,
struct proc *));
void in_purgeaddr __P((struct ifaddr *, struct ifnet *));
void in_purgeif __P((struct ifnet *));
void ip_input __P((struct mbuf *));
int ipflow_fastforward __P((struct mbuf *));
#endif
/* INET6 stuff */
#include <netinet6/in6_var.h>
#endif /* _NETINET_IN_VAR_H_ */