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in_pcb.h revision 1.24 
      1 /*	$NetBSD: in_pcb.h,v 1.24 1998/02/10 01:26:36 perry Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1990, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)in_pcb.h	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 #ifndef _NETINET_IN_PCB_H_
     39 #define _NETINET_IN_PCB_H_
     40 
     41 #include <sys/queue.h>
     42 
     43 /*
     44  * Common structure pcb for internet protocol implementation.
     45  * Here are stored pointers to local and foreign host table
     46  * entries, local and foreign socket numbers, and pointers
     47  * up (to a socket structure) and down (to a protocol-specific)
     48  * control block.
     49  */
     50 struct inpcb {
     51 	LIST_ENTRY(inpcb) inp_hash;
     52 	CIRCLEQ_ENTRY(inpcb) inp_queue;
     53 	struct	  inpcbtable *inp_table;
     54 	int	  inp_state;		/* bind/connect state */
     55 	u_int16_t inp_fport;		/* foreign port */
     56 	u_int16_t inp_lport;		/* local port */
     57 	struct	  socket *inp_socket;	/* back pointer to socket */
     58 	caddr_t	  inp_ppcb;		/* pointer to per-protocol pcb */
     59 	struct	  route inp_route;	/* placeholder for routing entry */
     60 	int	  inp_flags;		/* generic IP/datagram flags */
     61 	struct	  ip inp_ip;		/* header prototype; should have more */
     62 	struct	  mbuf *inp_options;	/* IP options */
     63 	struct	  ip_moptions *inp_moptions; /* IP multicast options */
     64 	int	  inp_errormtu;		/* MTU of last xmit status = EMSGSIZE */
     65 };
     66 #define	inp_faddr	inp_ip.ip_dst
     67 #define	inp_laddr	inp_ip.ip_src
     68 
     69 LIST_HEAD(inpcbhead, inpcb);
     70 
     71 struct inpcbtable {
     72 	CIRCLEQ_HEAD(, inpcb) inpt_queue;
     73 	struct	  inpcbhead *inpt_bindhashtbl;
     74 	struct	  inpcbhead *inpt_connecthashtbl;
     75 	u_long	  inpt_bindhash;
     76 	u_long	  inpt_connecthash;
     77 	u_int16_t inpt_lastport;
     78 	u_int16_t inpt_lastlow;
     79 };
     80 #define inpt_lasthi inpt_lastport
     81 
     82 /* states in inp_state: */
     83 #define	INP_ATTACHED		0
     84 #define	INP_BOUND		1
     85 #define	INP_CONNECTED		2
     86 
     87 /* flags in inp_flags: */
     88 #define	INP_RECVOPTS		0x01	/* receive incoming IP options */
     89 #define	INP_RECVRETOPTS		0x02	/* receive IP options for reply */
     90 #define	INP_RECVDSTADDR		0x04	/* receive IP dst address */
     91 #define	INP_HDRINCL		0x08	/* user supplies entire IP header */
     92 #define	INP_HIGHPORT		0x10	/* (unused; FreeBSD compat) */
     93 #define	INP_LOWPORT		0x20	/* user wants "low" port binding */
     94 #define	INP_ANONPORT		0x40	/* port chosen for user */
     95 #define	INP_RECVIF		0x80	/* receive incoming interface */
     96 #define	INP_CONTROLOPTS		(INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
     97 				INP_RECVIF)
     98 
     99 #define	INPLOOKUP_WILDCARD	1
    100 
    101 #define	sotoinpcb(so)		((struct inpcb *)(so)->so_pcb)
    102 
    103 #ifdef _KERNEL
    104 void	in_losing __P((struct inpcb *));
    105 int	in_pcballoc __P((struct socket *, void *));
    106 int	in_pcbbind __P((void *, struct mbuf *, struct proc *));
    107 int	in_pcbconnect __P((void *, struct mbuf *));
    108 void	in_pcbdetach __P((void *));
    109 void	in_pcbdisconnect __P((void *));
    110 void	in_pcbinit __P((struct inpcbtable *, int, int));
    111 struct inpcb *
    112 	in_pcblookup_bind __P((struct inpcbtable *,
    113 	    struct in_addr, u_int));
    114 struct inpcb *
    115 	in_pcblookup_connect __P((struct inpcbtable *,
    116 	    struct in_addr, u_int, struct in_addr, u_int));
    117 int	in_pcbnotify __P((struct inpcbtable *, struct in_addr, u_int,
    118 	    struct in_addr, u_int, int, void (*)(struct inpcb *, int)));
    119 void	in_pcbnotifyall __P((struct inpcbtable *, struct in_addr, int,
    120 	    void (*)(struct inpcb *, int)));
    121 void	in_pcbstate __P((struct inpcb *, int));
    122 void	in_rtchange __P((struct inpcb *, int));
    123 void	in_setpeeraddr __P((struct inpcb *, struct mbuf *));
    124 void	in_setsockaddr __P((struct inpcb *, struct mbuf *));
    125 struct rtentry *
    126 	in_pcbrtentry __P((struct inpcb *));
    127 #endif
    128 
    129 #endif /* _NETINET_IN_PCB_H_ */
    130