a1ea50ee45
of a lookup_wildcard arg; simplifies the logic a bit. * when assigning ephemeral ports in in_pcbbind(), always call in_pcblookup_port() with lookup_wildcard=1, so that ephemeral port allocation on sockets with SO_REUSEADDR set won't potentially bind to a port in use by something else (principle of least surprise).
128 lines
5.1 KiB
C
128 lines
5.1 KiB
C
/* $NetBSD: in_pcb.h,v 1.26 1998/10/05 14:33:14 lukem Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_pcb.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IN_PCB_H_
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#define _NETINET_IN_PCB_H_
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#include <sys/queue.h>
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/*
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* Common structure pcb for internet protocol implementation.
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* Here are stored pointers to local and foreign host table
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* entries, local and foreign socket numbers, and pointers
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* up (to a socket structure) and down (to a protocol-specific)
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* control block.
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*/
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struct inpcb {
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LIST_ENTRY(inpcb) inp_hash;
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CIRCLEQ_ENTRY(inpcb) inp_queue;
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caddr_t inp_ppcb; /* pointer to per-protocol pcb */
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int inp_state; /* bind/connect state */
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u_int16_t inp_fport; /* foreign port */
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u_int16_t inp_lport; /* local port */
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struct socket *inp_socket; /* back pointer to socket */
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struct route inp_route; /* placeholder for routing entry */
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int inp_flags; /* generic IP/datagram flags */
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struct ip inp_ip; /* header prototype; should have more */
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struct mbuf *inp_options; /* IP options */
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struct ip_moptions *inp_moptions; /* IP multicast options */
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int inp_errormtu; /* MTU of last xmit status = EMSGSIZE */
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struct inpcbtable *inp_table;
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};
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#define inp_faddr inp_ip.ip_dst
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#define inp_laddr inp_ip.ip_src
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LIST_HEAD(inpcbhead, inpcb);
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struct inpcbtable {
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CIRCLEQ_HEAD(, inpcb) inpt_queue;
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struct inpcbhead *inpt_bindhashtbl;
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struct inpcbhead *inpt_connecthashtbl;
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u_long inpt_bindhash;
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u_long inpt_connecthash;
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u_int16_t inpt_lastport;
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u_int16_t inpt_lastlow;
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};
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#define inpt_lasthi inpt_lastport
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/* states in inp_state: */
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#define INP_ATTACHED 0
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#define INP_BOUND 1
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#define INP_CONNECTED 2
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/* flags in inp_flags: */
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#define INP_RECVOPTS 0x01 /* receive incoming IP options */
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#define INP_RECVRETOPTS 0x02 /* receive IP options for reply */
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#define INP_RECVDSTADDR 0x04 /* receive IP dst address */
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#define INP_HDRINCL 0x08 /* user supplies entire IP header */
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#define INP_HIGHPORT 0x10 /* (unused; FreeBSD compat) */
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#define INP_LOWPORT 0x20 /* user wants "low" port binding */
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#define INP_ANONPORT 0x40 /* port chosen for user */
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#define INP_RECVIF 0x80 /* receive incoming interface */
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#define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
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INP_RECVIF)
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#define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
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#ifdef _KERNEL
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void in_losing __P((struct inpcb *));
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int in_pcballoc __P((struct socket *, void *));
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int in_pcbbind __P((void *, struct mbuf *, struct proc *));
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int in_pcbconnect __P((void *, struct mbuf *));
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void in_pcbdetach __P((void *));
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void in_pcbdisconnect __P((void *));
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void in_pcbinit __P((struct inpcbtable *, int, int));
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struct inpcb *
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in_pcblookup_bind __P((struct inpcbtable *,
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struct in_addr, u_int));
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struct inpcb *
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in_pcblookup_connect __P((struct inpcbtable *,
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struct in_addr, u_int, struct in_addr, u_int));
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int in_pcbnotify __P((struct inpcbtable *, struct in_addr, u_int,
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struct in_addr, u_int, int, void (*)(struct inpcb *, int)));
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void in_pcbnotifyall __P((struct inpcbtable *, struct in_addr, int,
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void (*)(struct inpcb *, int)));
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void in_pcbstate __P((struct inpcb *, int));
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void in_rtchange __P((struct inpcb *, int));
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void in_setpeeraddr __P((struct inpcb *, struct mbuf *));
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void in_setsockaddr __P((struct inpcb *, struct mbuf *));
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struct rtentry *
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in_pcbrtentry __P((struct inpcb *));
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#endif
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#endif /* _NETINET_IN_PCB_H_ */
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