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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.
* 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
* $FreeBSD$
*/
#ifndef _NETINET_IN_VAR_H_
#define _NETINET_IN_VAR_H_
#include <sys/queue.h>
#include <sys/fnv_hash.h>
/*
* Interface address, Internet version. One of these structures
* is allocated for each Internet address on an interface.
* 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 */
LIST_ENTRY(in_ifaddr) ia_hash; /* entry in bucket of inet addresses */
TAILQ_ENTRY(in_ifaddr) ia_link; /* 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 */
};
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 u_char inetctlerrmap[];
/*
* Hash table for IP addresses.
*/
extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr) *in_ifaddrhashtbl;
extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead;
extern u_long in_ifaddrhmask; /* mask for hash table */
#define INADDR_NHASH_LOG2 9
#define INADDR_NHASH (1 << INADDR_NHASH_LOG2)
#define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT)
#define INADDR_HASH(x) \
(&in_ifaddrhashtbl[INADDR_HASHVAL(x) & in_ifaddrhmask])
/*
* Macro for finding the internet address structure (in_ifaddr)
* corresponding to one of our IP addresses (in_addr).
*/
#define INADDR_TO_IFADDR(addr, ia) \
/* struct in_addr addr; */ \
/* struct in_ifaddr *ia; */ \
do { \
\
LIST_FOREACH(ia, INADDR_HASH((addr).s_addr), ia_hash) \
if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
break; \
} while (0)
/*
* 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_IFADDR(addr, ia); \
(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) = TAILQ_FIRST(&in_ifaddrhead); \
(ia) != NULL && (ia)->ia_ifp != (ifp); \
(ia) = TAILQ_NEXT((ia), ia_link)) \
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 */
SLIST_ENTRY(router_info) rti_list;
};
/*
* Internet multicast address structure. There is one of these for each IP
* multicast group to which this host belongs on a given network interface.
* For every entry on the interface's if_multiaddrs list which represents
* an IP multicast group, there is one of these structures. They are also
* kept on a system-wide list to make it easier to keep our legacy IGMP code
* compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
*/
struct in_multi {
LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
struct in_addr inm_addr; /* IP multicast address, convenience */
struct ifnet *inm_ifp; /* back pointer to ifnet */
struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */
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
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet);
SYSCTL_DECL(_net_inet_ip);
SYSCTL_DECL(_net_inet_raw);
#endif
extern LIST_HEAD(in_multihead, in_multi) in_multihead;
/*
* Lock macros for IPv4 layer multicast address lists. IPv4 lock goes
* before link layer multicast locks in the lock order. In most cases,
* consumers of IN_*_MULTI() macros should acquire the locks before
* calling them; users of the in_{add,del}multi() functions should not.
*/
extern struct mtx in_multi_mtx;
#define IN_MULTI_LOCK() mtx_lock(&in_multi_mtx)
#define IN_MULTI_UNLOCK() mtx_unlock(&in_multi_mtx)
#define IN_MULTI_LOCK_ASSERT() mtx_assert(&in_multi_mtx, MA_OWNED)
/*
* Structure used by macros below to remember position when stepping through
* all of the in_multi records.
*/
struct in_multistep {
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" is set null.
*/
#define IN_LOOKUP_MULTI(addr, ifp, inm) \
/* struct in_addr addr; */ \
/* struct ifnet *ifp; */ \
/* struct in_multi *inm; */ \
do { \
struct ifmultiaddr *ifma; \
\
IN_MULTI_LOCK_ASSERT(); \
IF_ADDR_LOCK(ifp); \
TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \
if (ifma->ifma_addr->sa_family == AF_INET \
&& ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \
(addr).s_addr) \
break; \
} \
(inm) = ifma ? ifma->ifma_protospec : 0; \
IF_ADDR_UNLOCK(ifp); \
} while(0)
/*
* 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; */ \
do { \
IN_MULTI_LOCK_ASSERT(); \
if (((inm) = (step).i_inm) != NULL) \
(step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
} while(0)
#define IN_FIRST_MULTI(step, inm) \
/* struct in_multistep step; */ \
/* struct in_multi *inm; */ \
do { \
IN_MULTI_LOCK_ASSERT(); \
(step).i_inm = LIST_FIRST(&in_multihead); \
IN_NEXT_MULTI((step), (inm)); \
} while(0)
struct route;
struct in_multi *in_addmulti(struct in_addr *, struct ifnet *);
void in_delmulti(struct in_multi *);
void in_delmulti_locked(struct in_multi *);
void in_delmulti_ifp(struct ifnet *ifp);
int in_control(struct socket *, u_long, caddr_t, struct ifnet *,
struct thread *);
void in_rtqdrain(void);
void ip_input(struct mbuf *);
int in_ifadown(struct ifaddr *ifa, int);
void in_ifscrub(struct ifnet *, struct in_ifaddr *);
struct mbuf *ip_fastforward(struct mbuf *);
#endif /* _KERNEL */
/* INET6 stuff */
#include <netinet6/in6_var.h>
#endif /* _NETINET_IN_VAR_H_ */
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