493 lines
18 KiB
C
493 lines
18 KiB
C
/*-
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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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* 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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* $FreeBSD$
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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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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#include <sys/_rwlock.h>
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#include <net/route.h>
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#ifdef _KERNEL
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#include <sys/rwlock.h>
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#endif
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#define in6pcb inpcb /* for KAME src sync over BSD*'s */
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#define in6p_sp inp_sp /* for KAME src sync over BSD*'s */
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struct inpcbpolicy;
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/*
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* struct inpcb is the common protocol control block structure used in most
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* IP transport protocols.
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*
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* Pointers to local and foreign host table entries, local and foreign socket
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* numbers, and pointers up (to a socket structure) and down (to a
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* protocol-specific control block) are stored here.
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*/
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LIST_HEAD(inpcbhead, inpcb);
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LIST_HEAD(inpcbporthead, inpcbport);
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typedef u_quad_t inp_gen_t;
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/*
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* PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
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* So, AF_INET6 null laddr is also used as AF_INET null laddr, by utilizing
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* the following structure.
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*/
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struct in_addr_4in6 {
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u_int32_t ia46_pad32[3];
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struct in_addr ia46_addr4;
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};
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/*
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* NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. in_conninfo has
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* some extra padding to accomplish this.
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*/
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struct in_endpoints {
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u_int16_t ie_fport; /* foreign port */
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u_int16_t ie_lport; /* local port */
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/* protocol dependent part, local and foreign addr */
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union {
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/* foreign host table entry */
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struct in_addr_4in6 ie46_foreign;
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struct in6_addr ie6_foreign;
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} ie_dependfaddr;
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union {
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/* local host table entry */
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struct in_addr_4in6 ie46_local;
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struct in6_addr ie6_local;
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} ie_dependladdr;
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#define ie_faddr ie_dependfaddr.ie46_foreign.ia46_addr4
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#define ie_laddr ie_dependladdr.ie46_local.ia46_addr4
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#define ie6_faddr ie_dependfaddr.ie6_foreign
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#define ie6_laddr ie_dependladdr.ie6_local
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};
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/*
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* XXX The defines for inc_* are hacks and should be changed to direct
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* references.
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*/
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struct in_conninfo {
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u_int8_t inc_flags;
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u_int8_t inc_len;
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u_int16_t inc_fibnum; /* XXX was pad, 16 bits is plenty */
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/* protocol dependent part */
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struct in_endpoints inc_ie;
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};
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#define inc_isipv6 inc_flags /* temp compatability */
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#define inc_fport inc_ie.ie_fport
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#define inc_lport inc_ie.ie_lport
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#define inc_faddr inc_ie.ie_faddr
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#define inc_laddr inc_ie.ie_laddr
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#define inc6_faddr inc_ie.ie6_faddr
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#define inc6_laddr inc_ie.ie6_laddr
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struct icmp6_filter;
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/*-
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* struct inpcb captures the network layer state for TCP, UDP, and raw IPv4
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* and IPv6 sockets. In the case of TCP, further per-connection state is
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* hung off of inp_ppcb most of the time. Almost all fields of struct inpcb
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* are static after creation or protected by a per-inpcb rwlock, inp_lock. A
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* few fields also require the global pcbinfo lock for the inpcb to be held,
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* when modified, such as the global connection lists and hashes, as well as
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* binding information (which affects which hash a connection is on). This
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* model means that connections can be looked up without holding the
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* per-connection lock, which is important for performance when attempting to
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* find the connection for a packet given its IP and port tuple. Writing to
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* these fields that write locks be held on both the inpcb and global locks.
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*
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* Key:
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* (c) - Constant after initialization
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* (i) - Protected by the inpcb lock
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* (p) - Protected by the pcbinfo lock for the inpcb
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* (s) - Protected by another subsystem's locks
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* (x) - Undefined locking
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*
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* A few other notes:
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*
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* When a read lock is held, stability of the field is guaranteed; to write
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* to a field, a write lock must generally be held.
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*
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* netinet/netinet6-layer code should not assume that the inp_socket pointer
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* is safe to dereference without inp_lock being held, even for protocols
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* other than TCP (where the inpcb persists during TIMEWAIT even after the
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* socket has been freed), or there may be close(2)-related races.
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*
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* The inp_vflag field is overloaded, and would otherwise ideally be (c).
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*/
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struct inpcb {
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LIST_ENTRY(inpcb) inp_hash; /* (i/p) hash list */
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LIST_ENTRY(inpcb) inp_list; /* (i/p) list for all PCBs for proto */
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void *inp_ppcb; /* (i) pointer to per-protocol pcb */
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struct inpcbinfo *inp_pcbinfo; /* (c) PCB list info */
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struct socket *inp_socket; /* (i) back pointer to socket */
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u_int32_t inp_flow; /* (i) IPv6 flow information */
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int inp_flags; /* (i) generic IP/datagram flags */
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u_char inp_vflag; /* (i) IP version flag (v4/v6) */
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#define INP_IPV4 0x1
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#define INP_IPV6 0x2
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#define INP_IPV6PROTO 0x4 /* opened under IPv6 protocol */
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#define INP_TIMEWAIT 0x8 /* .. probably doesn't go here */
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#define INP_ONESBCAST 0x10 /* send all-ones broadcast */
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#define INP_DROPPED 0x20 /* protocol drop flag */
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#define INP_SOCKREF 0x40 /* strong socket reference */
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u_char inp_ip_ttl; /* (i) time to live proto */
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u_char inp_ip_p; /* (c) protocol proto */
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u_char inp_ip_minttl; /* (i) minimum TTL or drop */
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uint32_t inp_ispare1; /* (x) connection id / queue id */
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void *inp_pspare[2]; /* (x) rtentry / general use */
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/* Local and foreign ports, local and foreign addr. */
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struct in_conninfo inp_inc;
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/* (i/p) list for PCB's local port */
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struct label *inp_label; /* (i) MAC label */
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struct inpcbpolicy *inp_sp; /* (s) for IPSEC */
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/* Protocol-dependent part; options. */
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struct {
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u_char inp4_ip_tos; /* (i) type of service proto */
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struct mbuf *inp4_options; /* (i) IP options */
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struct ip_moptions *inp4_moptions; /* (i) IP multicast options */
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} inp_depend4;
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#define inp_fport inp_inc.inc_fport
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#define inp_lport inp_inc.inc_lport
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#define inp_faddr inp_inc.inc_faddr
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#define inp_laddr inp_inc.inc_laddr
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#define inp_ip_tos inp_depend4.inp4_ip_tos
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#define inp_options inp_depend4.inp4_options
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#define inp_moptions inp_depend4.inp4_moptions
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struct {
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/* (i) IP options */
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struct mbuf *inp6_options;
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/* (i) IP6 options for outgoing packets */
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struct ip6_pktopts *inp6_outputopts;
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/* (i) IP multicast options */
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struct ip6_moptions *inp6_moptions;
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/* (i) ICMPv6 code type filter */
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struct icmp6_filter *inp6_icmp6filt;
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/* (i) IPV6_CHECKSUM setsockopt */
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int inp6_cksum;
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short inp6_hops;
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} inp_depend6;
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LIST_ENTRY(inpcb) inp_portlist; /* (i/p) */
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struct inpcbport *inp_phd; /* (i/p) head of this list */
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#define inp_zero_size offsetof(struct inpcb, inp_gencnt)
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inp_gen_t inp_gencnt; /* (c) generation count of this instance */
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struct rwlock inp_lock;
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#define in6p_faddr inp_inc.inc6_faddr
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#define in6p_laddr inp_inc.inc6_laddr
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#define in6p_hops inp_depend6.inp6_hops /* default hop limit */
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#define in6p_ip6_nxt inp_ip_p
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#define in6p_flowinfo inp_flow
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#define in6p_vflag inp_vflag
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#define in6p_options inp_depend6.inp6_options
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#define in6p_outputopts inp_depend6.inp6_outputopts
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#define in6p_moptions inp_depend6.inp6_moptions
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#define in6p_icmp6filt inp_depend6.inp6_icmp6filt
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#define in6p_cksum inp_depend6.inp6_cksum
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#define in6p_flags inp_flags /* for KAME src sync over BSD*'s */
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#define in6p_socket inp_socket /* for KAME src sync over BSD*'s */
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#define in6p_lport inp_lport /* for KAME src sync over BSD*'s */
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#define in6p_fport inp_fport /* for KAME src sync over BSD*'s */
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#define in6p_ppcb inp_ppcb /* for KAME src sync over BSD*'s */
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};
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/*
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* The range of the generation count, as used in this implementation, is 9e19.
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* We would have to create 300 billion connections per second for this number
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* to roll over in a year. This seems sufficiently unlikely that we simply
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* don't concern ourselves with that possibility.
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*/
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/*
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* Interface exported to userland by various protocols which use inpcbs. Hack
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* alert -- only define if struct xsocket is in scope.
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*/
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#ifdef _SYS_SOCKETVAR_H_
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struct xinpcb {
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size_t xi_len; /* length of this structure */
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struct inpcb xi_inp;
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struct xsocket xi_socket;
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u_quad_t xi_alignment_hack;
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};
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struct xinpgen {
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size_t xig_len; /* length of this structure */
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u_int xig_count; /* number of PCBs at this time */
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inp_gen_t xig_gen; /* generation count at this time */
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so_gen_t xig_sogen; /* socket generation count at this time */
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};
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#endif /* _SYS_SOCKETVAR_H_ */
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struct inpcbport {
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LIST_ENTRY(inpcbport) phd_hash;
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struct inpcbhead phd_pcblist;
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u_short phd_port;
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};
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/*
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* Global data structure for each high-level protocol (UDP, TCP, ...) in both
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* IPv4 and IPv6. Holds inpcb lists and information for managing them.
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*/
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struct inpcbinfo {
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/*
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* Global list of inpcbs on the protocol.
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*/
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struct inpcbhead *ipi_listhead;
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u_int ipi_count;
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/*
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* Global hash of inpcbs, hashed by local and foreign addresses and
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* port numbers.
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*/
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struct inpcbhead *ipi_hashbase;
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u_long ipi_hashmask;
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/*
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* Global hash of inpcbs, hashed by only local port number.
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*/
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struct inpcbporthead *ipi_porthashbase;
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u_long ipi_porthashmask;
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/*
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* Fields associated with port lookup and allocation.
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*/
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u_short ipi_lastport;
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u_short ipi_lastlow;
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u_short ipi_lasthi;
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/*
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* UMA zone from which inpcbs are allocated for this protocol.
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*/
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struct uma_zone *ipi_zone;
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/*
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* Generation count--incremented each time a connection is allocated
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* or freed.
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*/
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u_quad_t ipi_gencnt;
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struct rwlock ipi_lock;
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/*
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* vimage 1
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* general use 1
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*/
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void *ipi_pspare[2];
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};
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#define INP_LOCK_INIT(inp, d, t) \
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rw_init_flags(&(inp)->inp_lock, (t), RW_RECURSE | RW_DUPOK)
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#define INP_LOCK_DESTROY(inp) rw_destroy(&(inp)->inp_lock)
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#define INP_RLOCK(inp) rw_rlock(&(inp)->inp_lock)
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#define INP_WLOCK(inp) rw_wlock(&(inp)->inp_lock)
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#define INP_TRY_RLOCK(inp) rw_try_rlock(&(inp)->inp_lock)
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#define INP_TRY_WLOCK(inp) rw_try_wlock(&(inp)->inp_lock)
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#define INP_RUNLOCK(inp) rw_runlock(&(inp)->inp_lock)
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#define INP_WUNLOCK(inp) rw_wunlock(&(inp)->inp_lock)
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#define INP_LOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_LOCKED)
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#define INP_RLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_RLOCKED)
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#define INP_WLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_WLOCKED)
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#define INP_UNLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_UNLOCKED)
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#ifdef _KERNEL
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/*
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* These locking functions are for inpcb consumers outside of sys/netinet,
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* more specifically, they were added for the benefit of TOE drivers. The
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* macros are reserved for use by the stack.
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*/
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void inp_wlock(struct inpcb *);
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void inp_wunlock(struct inpcb *);
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void inp_rlock(struct inpcb *);
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void inp_runlock(struct inpcb *);
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#ifdef INVARIANTS
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void inp_lock_assert(struct inpcb *);
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void inp_unlock_assert(struct inpcb *);
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#else
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static __inline void
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inp_lock_assert(struct inpcb *inp __unused)
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{
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}
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static __inline void
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inp_unlock_assert(struct inpcb *inp __unused)
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{
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}
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#endif
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void inp_apply_all(void (*func)(struct inpcb *, void *), void *arg);
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int inp_ip_tos_get(const struct inpcb *inp);
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void inp_ip_tos_set(struct inpcb *inp, int val);
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struct socket *
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inp_inpcbtosocket(struct inpcb *inp);
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struct tcpcb *
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inp_inpcbtotcpcb(struct inpcb *inp);
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void inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
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uint32_t *faddr, uint16_t *fp);
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#endif /* _KERNEL */
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#define INP_INFO_LOCK_INIT(ipi, d) \
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rw_init_flags(&(ipi)->ipi_lock, (d), RW_RECURSE)
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#define INP_INFO_LOCK_DESTROY(ipi) rw_destroy(&(ipi)->ipi_lock)
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#define INP_INFO_RLOCK(ipi) rw_rlock(&(ipi)->ipi_lock)
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#define INP_INFO_WLOCK(ipi) rw_wlock(&(ipi)->ipi_lock)
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#define INP_INFO_TRY_RLOCK(ipi) rw_try_rlock(&(ipi)->ipi_lock)
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#define INP_INFO_TRY_WLOCK(ipi) rw_try_wlock(&(ipi)->ipi_lock)
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#define INP_INFO_RUNLOCK(ipi) rw_runlock(&(ipi)->ipi_lock)
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#define INP_INFO_WUNLOCK(ipi) rw_wunlock(&(ipi)->ipi_lock)
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#define INP_INFO_LOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_LOCKED)
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#define INP_INFO_RLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_RLOCKED)
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#define INP_INFO_WLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_WLOCKED)
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#define INP_INFO_UNLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_UNLOCKED)
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#define INP_PCBHASH(faddr, lport, fport, mask) \
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(((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
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#define INP_PCBPORTHASH(lport, mask) \
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(ntohs((lport)) & (mask))
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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 /* user wants "high" port binding */
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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_MTUDISC 0x100 /* user can do MTU discovery */
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#define INP_FAITH 0x200 /* accept FAITH'ed connections */
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#define INP_RECVTTL 0x400 /* receive incoming IP TTL */
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#define INP_DONTFRAG 0x800 /* don't fragment packet */
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#define IN6P_IPV6_V6ONLY 0x008000 /* restrict AF_INET6 socket for v6 */
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#define IN6P_PKTINFO 0x010000 /* receive IP6 dst and I/F */
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#define IN6P_HOPLIMIT 0x020000 /* receive hoplimit */
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#define IN6P_HOPOPTS 0x040000 /* receive hop-by-hop options */
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#define IN6P_DSTOPTS 0x080000 /* receive dst options after rthdr */
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#define IN6P_RTHDR 0x100000 /* receive routing header */
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#define IN6P_RTHDRDSTOPTS 0x200000 /* receive dstoptions before rthdr */
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#define IN6P_TCLASS 0x400000 /* receive traffic class value */
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#define IN6P_AUTOFLOWLABEL 0x800000 /* attach flowlabel automatically */
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#define IN6P_RFC2292 0x40000000 /* used RFC2292 API on the socket */
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#define IN6P_MTU 0x80000000 /* receive path MTU */
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#define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
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INP_RECVIF|INP_RECVTTL|\
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IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
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IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
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IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\
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IN6P_MTU)
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#define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\
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IN6P_TCLASS|IN6P_AUTOFLOWLABEL)
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|
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/* for KAME src sync over BSD*'s */
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#define IN6P_HIGHPORT INP_HIGHPORT
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#define IN6P_LOWPORT INP_LOWPORT
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#define IN6P_ANONPORT INP_ANONPORT
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#define IN6P_RECVIF INP_RECVIF
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#define IN6P_MTUDISC INP_MTUDISC
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#define IN6P_FAITH INP_FAITH
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#define IN6P_CONTROLOPTS INP_CONTROLOPTS
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/*
|
|
* socket AF version is {newer than,or include}
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|
* actual datagram AF version
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|
*/
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|
|
|
#define INPLOOKUP_WILDCARD 1
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|
#define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
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|
#define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */
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|
|
|
#define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
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|
|
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#define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af)
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|
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#ifdef _KERNEL
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extern int ipport_reservedhigh;
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|
extern int ipport_reservedlow;
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|
extern int ipport_lowfirstauto;
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|
extern int ipport_lowlastauto;
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|
extern int ipport_firstauto;
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|
extern int ipport_lastauto;
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|
extern int ipport_hifirstauto;
|
|
extern int ipport_hilastauto;
|
|
extern struct callout ipport_tick_callout;
|
|
|
|
void in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *);
|
|
int in_pcballoc(struct socket *, struct inpcbinfo *);
|
|
int in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *);
|
|
int in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
|
|
u_short *, struct ucred *);
|
|
int in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *);
|
|
int in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
|
|
u_short *, in_addr_t *, u_short *, struct inpcb **,
|
|
struct ucred *);
|
|
void in_pcbdetach(struct inpcb *);
|
|
void in_pcbdisconnect(struct inpcb *);
|
|
void in_pcbdrop(struct inpcb *);
|
|
void in_pcbfree(struct inpcb *);
|
|
int in_pcbinshash(struct inpcb *);
|
|
struct inpcb *
|
|
in_pcblookup_local(struct inpcbinfo *,
|
|
struct in_addr, u_short, int, struct ucred *);
|
|
struct inpcb *
|
|
in_pcblookup_hash(struct inpcbinfo *, struct in_addr, u_int,
|
|
struct in_addr, u_int, int, struct ifnet *);
|
|
void in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr,
|
|
int, struct inpcb *(*)(struct inpcb *, int));
|
|
void in_pcbrehash(struct inpcb *);
|
|
void in_pcbsetsolabel(struct socket *so);
|
|
int in_getpeeraddr(struct socket *so, struct sockaddr **nam);
|
|
int in_getsockaddr(struct socket *so, struct sockaddr **nam);
|
|
struct sockaddr *
|
|
in_sockaddr(in_port_t port, struct in_addr *addr);
|
|
void in_pcbsosetlabel(struct socket *so);
|
|
void in_pcbremlists(struct inpcb *inp);
|
|
void ipport_tick(void *xtp);
|
|
|
|
/*
|
|
* Debugging routines compiled in when DDB is present.
|
|
*/
|
|
void db_print_inpcb(struct inpcb *inp, const char *name, int indent);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_NETINET_IN_PCB_H_ */
|