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NetBSD/sys/netinet/in_pcb.h

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/* $NetBSD: in_pcb.h,v 1.76 2022/11/04 09:03:20 ozaki-r 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/ip.h>
#include <netinet/ip6.h>
typedef int (*pcb_overudp_cb_t)(struct mbuf **, int, struct socket *,
struct sockaddr *, void *);
struct ip_moptions;
struct mbuf;
struct icmp6_filter;
/*
* 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 {
LIST_ENTRY(inpcb) inp_hash;
LIST_ENTRY(inpcb) inp_lhash;
TAILQ_ENTRY(inpcb) inp_queue;
int inp_af; /* address family - AF_INET or AF_INET6 */
void * inp_ppcb; /* pointer to per-protocol pcb */
int inp_state; /* bind/connect state */
#define INP_ATTACHED 0
#define INP_BOUND 1
#define INP_CONNECTED 2
int inp_portalgo;
struct socket *inp_socket; /* back pointer to socket */
struct inpcbtable *inp_table;
struct inpcbpolicy *inp_sp; /* security policy */
struct route inp_route; /* placeholder for routing entry */
in_port_t inp_fport; /* foreign port */
in_port_t inp_lport; /* local port */
int inp_flags; /* generic IP/datagram flags */
struct mbuf *inp_options; /* IP options */
bool inp_bindportonsend;
/* We still need it for IPv6 due to v4-mapped addresses */
struct ip_moptions *inp_moptions; /* IPv4 multicast options */
pcb_overudp_cb_t inp_overudp_cb;
void *inp_overudp_arg;
};
struct in4pcb {
struct inpcb in4p_pcb;
struct ip in4p_ip;
int in4p_errormtu; /* MTU of last xmit status = EMSGSIZE */
uint8_t in4p_ip_minttl;
struct in_addr in4p_prefsrcip; /* preferred src IP when wild */
};
#define in4p_faddr(inpcb) (((struct in4pcb *)(inpcb))->in4p_ip.ip_dst)
#define in4p_laddr(inpcb) (((struct in4pcb *)(inpcb))->in4p_ip.ip_src)
#define const_in4p_faddr(inpcb) (((const struct in4pcb *)(inpcb))->in4p_ip.ip_dst)
#define const_in4p_laddr(inpcb) (((const struct in4pcb *)(inpcb))->in4p_ip.ip_src)
#define in4p_ip(inpcb) (((struct in4pcb *)(inpcb))->in4p_ip)
#define in4p_errormtu(inpcb) (((struct in4pcb *)(inpcb))->in4p_errormtu)
#define in4p_ip_minttl(inpcb) (((struct in4pcb *)(inpcb))->in4p_ip_minttl)
#define in4p_prefsrcip(inpcb) (((struct in4pcb *)(inpcb))->in4p_prefsrcip)
struct in6pcb {
struct inpcb in6p_pcb;
struct ip6_hdr in6p_ip6;
int in6p_hops; /* default IPv6 hop limit */
int in6p_cksum; /* IPV6_CHECKSUM setsockopt */
struct icmp6_filter *in6p_icmp6filt;
struct ip6_pktopts *in6p_outputopts; /* IP6 options for outgoing packets */
struct ip6_moptions *in6p_moptions; /* IPv6 multicast options */
};
#define in6p_faddr(inpcb) (((struct in6pcb *)(inpcb))->in6p_ip6.ip6_dst)
#define in6p_laddr(inpcb) (((struct in6pcb *)(inpcb))->in6p_ip6.ip6_src)
#define const_in6p_faddr(inpcb) (((const struct in6pcb *)(inpcb))->in6p_ip6.ip6_dst)
#define const_in6p_laddr(inpcb) (((const struct in6pcb *)(inpcb))->in6p_ip6.ip6_src)
#define in6p_ip6(inpcb) (((struct in6pcb *)(inpcb))->in6p_ip6)
#define in6p_flowinfo(inpcb) (((struct in6pcb *)(inpcb))->in6p_ip6.ip6_flow)
#define const_in6p_flowinfo(inpcb) (((const struct in6pcb *)(inpcb))->in6p_ip6.ip6_flow)
#define in6p_hops6(inpcb) (((struct in6pcb *)(inpcb))->in6p_hops)
#define in6p_cksum(inpcb) (((struct in6pcb *)(inpcb))->in6p_cksum)
#define in6p_icmp6filt(inpcb) (((struct in6pcb *)(inpcb))->in6p_icmp6filt)
#define in6p_outputopts(inpcb) (((struct in6pcb *)(inpcb))->in6p_outputopts)
#define in6p_moptions(inpcb) (((struct in6pcb *)(inpcb))->in6p_moptions)
LIST_HEAD(inpcbhead, inpcb);
/* 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_BINDANY 0x2000 /* allow bind to any address */
#define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
INP_RECVIF|INP_RECVTTL|INP_RECVPKTINFO)
/*
* Flags for IPv6 in inp_flags
* We define KAME's original flags in higher 16 bits as much as possible
* for compatibility with *bsd*s.
*/
#define IN6P_RECVOPTS 0x00001000 /* receive incoming IP6 options */
#define IN6P_RECVRETOPTS 0x00002000 /* receive IP6 options for reply */
#define IN6P_RECVDSTADDR 0x00004000 /* receive IP6 dst address */
#define IN6P_IPV6_V6ONLY 0x00008000 /* restrict AF_INET6 socket for v6 */
#define IN6P_PKTINFO 0x00010000 /* receive IP6 dst and I/F */
#define IN6P_HOPLIMIT 0x00020000 /* receive hoplimit */
#define IN6P_HOPOPTS 0x00040000 /* receive hop-by-hop options */
#define IN6P_DSTOPTS 0x00080000 /* receive dst options after rthdr */
#define IN6P_RTHDR 0x00100000 /* receive routing header */
#define IN6P_RTHDRDSTOPTS 0x00200000 /* receive dstoptions before rthdr */
#define IN6P_TCLASS 0x00400000 /* traffic class */
#define IN6P_BINDANY 0x00800000 /* allow bind to any address */
#define IN6P_HIGHPORT 0x01000000 /* user wants "high" port binding */
#define IN6P_LOWPORT 0x02000000 /* user wants "low" port binding */
#define IN6P_ANONPORT 0x04000000 /* port chosen for user */
#define IN6P_FAITH 0x08000000 /* accept FAITH'ed connections */
/* XXX should move to an UDP control block */
#define IN6P_ESPINUDP INP_ESPINUDP /* ESP over UDP for NAT-T */
#define IN6P_RFC2292 0x40000000 /* RFC2292 */
#define IN6P_MTU 0x80000000 /* use minimum MTU */
#define IN6P_CONTROLOPTS (IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
IN6P_TCLASS|IN6P_RFC2292|\
IN6P_MTU)
#define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
#define soaf(so) (so->so_proto->pr_domain->dom_family)
#define inp_lock(inp) solock((inp)->inp_socket)
#define inp_unlock(inp) sounlock((inp)->inp_socket)
#define inp_locked(inp) solocked((inp)->inp_socket)
TAILQ_HEAD(inpcbqueue, inpcb);
struct vestigial_hooks;
/* It's still referenced by kvm users */
struct inpcbtable {
struct inpcbqueue inpt_queue;
struct inpcbhead *inpt_porthashtbl;
struct inpcbhead *inpt_bindhashtbl;
struct inpcbhead *inpt_connecthashtbl;
u_long inpt_porthash;
u_long inpt_bindhash;
u_long inpt_connecthash;
in_port_t inpt_lastport;
in_port_t inpt_lastlow;
struct vestigial_hooks *vestige;
};
#define inpt_lasthi inpt_lastport
#ifdef _KERNEL
#include <sys/kauth.h>
#include <sys/queue.h>
struct lwp;
struct rtentry;
struct sockaddr_in;
struct socket;
struct vestigial_inpcb;
void inpcb_losing(struct inpcb *);
int inpcb_create(struct socket *, void *);
int inpcb_bindableaddr(const struct inpcb *, struct sockaddr_in *,
kauth_cred_t);
int inpcb_bind(void *, struct sockaddr_in *, struct lwp *);
int inpcb_connect(void *, struct sockaddr_in *, struct lwp *);
void inpcb_destroy(void *);
void inpcb_disconnect(void *);
void inpcb_init(struct inpcbtable *, int, int);
struct inpcb *
inpcb_lookup_local(struct inpcbtable *,
struct in_addr, u_int, int, struct vestigial_inpcb *);
struct inpcb *
inpcb_lookup_bound(struct inpcbtable *,
struct in_addr, u_int);
struct inpcb *
inpcb_lookup(struct inpcbtable *,
struct in_addr, u_int, struct in_addr, u_int,
struct vestigial_inpcb *);
int inpcb_notify(struct inpcbtable *, struct in_addr, u_int,
struct in_addr, u_int, int, void (*)(struct inpcb *, int));
void inpcb_notifyall(struct inpcbtable *, struct in_addr, int,
void (*)(struct inpcb *, int));
void inpcb_purgeif0(struct inpcbtable *, struct ifnet *);
void inpcb_purgeif(struct inpcbtable *, struct ifnet *);
void in_purgeifmcast(struct ip_moptions *, struct ifnet *);
void inpcb_set_state(struct inpcb *, int);
void inpcb_rtchange(struct inpcb *, int);
void inpcb_fetch_peeraddr(struct inpcb *, struct sockaddr_in *);
void inpcb_fetch_sockaddr(struct inpcb *, struct sockaddr_in *);
struct rtentry *
inpcb_rtentry(struct inpcb *);
void inpcb_rtentry_unref(struct rtentry *, struct inpcb *);
void in6pcb_init(struct inpcbtable *, int, int);
int in6pcb_bind(void *, struct sockaddr_in6 *, struct lwp *);
int in6pcb_connect(void *, struct sockaddr_in6 *, struct lwp *);
void in6pcb_destroy(struct inpcb *);
void in6pcb_disconnect(struct inpcb *);
struct inpcb *in6pcb_lookup_local(struct inpcbtable *, struct in6_addr *,
u_int, int, struct vestigial_inpcb *);
int in6pcb_notify(struct inpcbtable *, const struct sockaddr *,
u_int, const struct sockaddr *, u_int, int, void *,
void (*)(struct inpcb *, int));
void in6pcb_purgeif0(struct inpcbtable *, struct ifnet *);
void in6pcb_purgeif(struct inpcbtable *, struct ifnet *);
void in6pcb_set_state(struct inpcb *, int);
void in6pcb_rtchange(struct inpcb *, int);
void in6pcb_fetch_peeraddr(struct inpcb *, struct sockaddr_in6 *);
void in6pcb_fetch_sockaddr(struct inpcb *, struct sockaddr_in6 *);
/* in in6_src.c */
int in6pcb_selecthlim(struct inpcb *, struct ifnet *);
int in6pcb_selecthlim_rt(struct inpcb *);
int in6pcb_set_port(struct sockaddr_in6 *, struct inpcb *, struct lwp *);
extern struct rtentry *
in6pcb_rtentry(struct inpcb *);
extern void
in6pcb_rtentry_unref(struct rtentry *, struct inpcb *);
extern struct inpcb *in6pcb_lookup(struct inpcbtable *,
const struct in6_addr *, u_int, const struct in6_addr *, u_int, int,
struct vestigial_inpcb *);
extern struct inpcb *in6pcb_lookup_bound(struct inpcbtable *,
const struct in6_addr *, u_int, int);
static inline void
inpcb_register_overudp_cb(struct inpcb *inp, pcb_overudp_cb_t cb, void *arg)
{
inp->inp_overudp_cb = cb;
inp->inp_overudp_arg = arg;
}
/* compute hash value for foreign and local in6_addr and port */
#define IN6_HASH(faddr, fport, laddr, lport) \
(((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \
(faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3] ^ \
(laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
(laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) \
+ (fport) + (lport))
// from in_pcb_hdr.h
struct vestigial_inpcb;
struct in6_addr;
/* Hooks for vestigial pcb entries.
* If vestigial entries exist for a table (TCP only)
* the vestigial pointer is set.
*/
typedef struct vestigial_hooks {
/* IPv4 hooks */
void *(*init_ports4)(struct in_addr, u_int, int);
int (*next_port4)(void *, struct vestigial_inpcb *);
int (*lookup4)(struct in_addr, uint16_t,
struct in_addr, uint16_t,
struct vestigial_inpcb *);
/* IPv6 hooks */
void *(*init_ports6)(const struct in6_addr*, u_int, int);
int (*next_port6)(void *, struct vestigial_inpcb *);
int (*lookup6)(const struct in6_addr *, uint16_t,
const struct in6_addr *, uint16_t,
struct vestigial_inpcb *);
} vestigial_hooks_t;
#endif /* _KERNEL */
#endif /* !_NETINET_IN_PCB_H_ */
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