xref: /src/sys/netinet/in_pcb.h

/*	$NetBSD: in_pcb.h,v 1.68 2020/08/28 07:01:57 riastradh Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * 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 project 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 PROJECT 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 PROJECT 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) 1982, 1986, 1990, 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_pcb.h	8.1 (Berkeley) 6/10/93
 */

#ifndef _NETINET_IN_PCB_H_
#define _NETINET_IN_PCB_H_

#include <sys/types.h>

#include <net/route.h>

#include <netinet/in.h>
#include <netinet/in_pcb_hdr.h>
#include <netinet/ip.h>

struct ip_moptions;
struct mbuf;

/*
 * Common structure pcb for internet protocol implementation.
 * Here are stored pointers to local and foreign host table
 * entries, local and foreign socket numbers, and pointers
 * up (to a socket structure) and down (to a protocol-specific)
 * control block.
 */
struct inpcb {
	struct inpcb_hdr inp_head;
#define inp_hash	inp_head.inph_hash
#define inp_queue	inp_head.inph_queue
#define inp_af		inp_head.inph_af
#define inp_ppcb	inp_head.inph_ppcb
#define inp_state	inp_head.inph_state
#define inp_portalgo	inp_head.inph_portalgo
#define inp_socket	inp_head.inph_socket
#define inp_table	inp_head.inph_table
#define inp_sp		inp_head.inph_sp
	struct	  route inp_route;	/* placeholder for routing entry */
	u_int16_t inp_fport;		/* foreign port */
	u_int16_t inp_lport;		/* local port */
	int	  inp_flags;		/* generic IP/datagram flags */
	struct	  ip inp_ip;		/* header prototype; should have more */
	struct	  mbuf *inp_options;	/* IP options */
	struct	  ip_moptions *inp_moptions; /* IP multicast options */
	int	  inp_errormtu;		/* MTU of last xmit status = EMSGSIZE */
	uint8_t	  inp_ip_minttl;
	bool      inp_bindportonsend;
	struct    in_addr inp_prefsrcip; /* preferred src IP when wild  */
	pcb_overudp_cb_t inp_overudp_cb;
	void      *inp_overudp_arg;
};

#define	inp_faddr	inp_ip.ip_dst
#define	inp_laddr	inp_ip.ip_src

/* flags in inp_flags: */
#define	INP_RECVOPTS		0x0001	/* receive incoming IP options */
#define	INP_RECVRETOPTS		0x0002	/* receive IP options for reply */
#define	INP_RECVDSTADDR		0x0004	/* receive IP dst address */
#define	INP_HDRINCL		0x0008	/* user supplies entire IP header */
#define	INP_HIGHPORT		0x0010	/* (unused; FreeBSD compat) */
#define	INP_LOWPORT		0x0020	/* user wants "low" port binding */
#define	INP_ANONPORT		0x0040	/* port chosen for user */
#define	INP_RECVIF		0x0080	/* receive incoming interface */
/* XXX should move to an UDP control block */
#define INP_ESPINUDP		0x0100	/* ESP over UDP for NAT-T */
#define INP_ESPINUDP_NON_IKE	0x0200	/* ESP over UDP for NAT-T */
#define INP_NOHEADER		0x0400	/* Kernel removes IP header
					 * before feeding a packet
					 * to the raw socket user.
					 * The socket user will
					 * not supply an IP header.
					 * Cancels INP_HDRINCL.
					 */
#define	INP_RECVTTL		0x0800	/* receive incoming IP TTL */
#define	INP_RECVPKTINFO		0x1000	/* receive IP dst if/addr */
#define	INP_CONTROLOPTS		(INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
				INP_RECVIF|INP_RECVTTL|INP_RECVPKTINFO)

#define	sotoinpcb(so)		((struct inpcb *)(so)->so_pcb)
#define	inp_lock(inp)		solock((inp)->inp_socket)
#define	inp_unlock(inp)		sounlock((inp)->inp_socket)
#define	inp_locked(inp)		solocked((inp)->inp_socket)

#ifdef _KERNEL

#include <sys/kauth.h>
#include <sys/queue.h>

struct inpcbtable;
struct lwp;
struct rtentry;
struct sockaddr_in;
struct socket;
struct vestigial_inpcb;

void	in_losing(struct inpcb *);
int	in_pcballoc(struct socket *, void *);
int	in_pcbbindableaddr(struct sockaddr_in *, kauth_cred_t);
int	in_pcbbind(void *, struct sockaddr_in *, struct lwp *);
int	in_pcbconnect(void *, struct sockaddr_in *, struct lwp *);
void	in_pcbdetach(void *);
void	in_pcbdisconnect(void *);
void	in_pcbinit(struct inpcbtable *, int, int);
struct inpcb *
	in_pcblookup_port(struct inpcbtable *,
			  struct in_addr, u_int, int, struct vestigial_inpcb *);
struct inpcb *
	in_pcblookup_bind(struct inpcbtable *,
	    struct in_addr, u_int);
struct inpcb *
	in_pcblookup_connect(struct inpcbtable *,
			     struct in_addr, u_int, struct in_addr, u_int,
			     struct vestigial_inpcb *);
int	in_pcbnotify(struct inpcbtable *, struct in_addr, u_int,
	    struct in_addr, u_int, int, void (*)(struct inpcb *, int));
void	in_pcbnotifyall(struct inpcbtable *, struct in_addr, int,
	    void (*)(struct inpcb *, int));
void	in_pcbpurgeif0(struct inpcbtable *, struct ifnet *);
void	in_pcbpurgeif(struct inpcbtable *, struct ifnet *);
void	in_purgeifmcast(struct ip_moptions *, struct ifnet *);
void	in_pcbstate(struct inpcb *, int);
void	in_rtchange(struct inpcb *, int);
void	in_setpeeraddr(struct inpcb *, struct sockaddr_in *);
void	in_setsockaddr(struct inpcb *, struct sockaddr_in *);
struct rtentry *
	in_pcbrtentry(struct inpcb *);
void	in_pcbrtentry_unref(struct rtentry *, struct inpcb *);

static inline void
in_pcb_register_overudp_cb(struct inpcb *inp, pcb_overudp_cb_t cb, void *arg)
{

	inp->inp_overudp_cb = cb;
	inp->inp_overudp_arg = arg;
}

#endif	/* _KERNEL */

#endif	/* !_NETINET_IN_PCB_H_ */