289 lines
11 KiB
C
289 lines
11 KiB
C
/* $OpenBSD: ip_var.h,v 1.117 2024/04/17 20:48:51 bluhm Exp $ */
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/* $NetBSD: ip_var.h,v 1.16 1996/02/13 23:43:20 christos Exp $ */
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/*
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* Copyright (c) 1982, 1986, 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. 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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* @(#)ip_var.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IP_VAR_H_
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#define _NETINET_IP_VAR_H_
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/*
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* Structure stored in mbuf in inpcb.ip_options
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* and passed to ip_output when ip options are in use.
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* The actual length of the options (including ipopt_dst)
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* is in m_len.
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*/
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#define MAX_IPOPTLEN 40
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/*
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* Overlay for ip header used by other protocols (tcp, udp).
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*/
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struct ipovly {
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u_int8_t ih_x1[9]; /* (unused) */
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u_int8_t ih_pr; /* protocol */
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u_int16_t ih_len; /* protocol length */
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struct in_addr ih_src; /* source internet address */
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struct in_addr ih_dst; /* destination internet address */
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};
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struct ipstat {
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u_long ips_total; /* total packets received */
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u_long ips_badsum; /* checksum bad */
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u_long ips_tooshort; /* packet too short */
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u_long ips_toosmall; /* not enough data */
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u_long ips_badhlen; /* ip header length < data size */
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u_long ips_badlen; /* ip length < ip header length */
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u_long ips_fragments; /* fragments received */
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u_long ips_fragdropped; /* frags dropped (dups, out of space) */
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u_long ips_fragtimeout; /* fragments timed out */
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u_long ips_forward; /* packets forwarded */
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u_long ips_cantforward; /* packets rcvd for unreachable dest */
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u_long ips_redirectsent; /* packets forwarded on same net */
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u_long ips_noproto; /* unknown or unsupported protocol */
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u_long ips_delivered; /* datagrams delivered to upper level*/
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u_long ips_localout; /* total ip packets generated here */
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u_long ips_odropped; /* lost output due to nobufs, etc. */
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u_long ips_reassembled; /* total packets reassembled ok */
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u_long ips_fragmented; /* datagrams successfully fragmented */
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u_long ips_ofragments; /* output fragments created */
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u_long ips_cantfrag; /* don't fragment flag was set, etc. */
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u_long ips_badoptions; /* error in option processing */
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u_long ips_noroute; /* packets discarded due to no route */
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u_long ips_badvers; /* ip version != 4 */
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u_long ips_rawout; /* total raw ip packets generated */
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u_long ips_badfrags; /* malformed fragments (bad length) */
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u_long ips_rcvmemdrop; /* frags dropped for lack of memory */
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u_long ips_toolong; /* ip length > max ip packet size */
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u_long ips_nogif; /* no match gif found */
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u_long ips_badaddr; /* invalid address on header */
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u_long ips_inswcsum; /* software checksummed on input */
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u_long ips_outswcsum; /* software checksummed on output */
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u_long ips_notmember; /* multicasts for unregistered groups */
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u_long ips_rtcachehit; /* valid route found in cache */
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u_long ips_rtcachemiss; /* route cache with new destination */
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u_long ips_wrongif; /* packet received on wrong interface */
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u_long ips_idropped; /* lost input due to nobufs, etc. */
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};
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struct ipoption {
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struct in_addr ipopt_dst; /* first-hop dst if source routed */
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int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
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};
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#ifdef _KERNEL
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#include <sys/percpu.h>
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enum ipstat_counters {
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ips_total, /* total packets received */
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ips_badsum, /* checksum bad */
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ips_tooshort, /* packet too short */
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ips_toosmall, /* not enough data */
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ips_badhlen, /* ip header length < data size */
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ips_badlen, /* ip length < ip header length */
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ips_fragments, /* fragments received */
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ips_fragdropped, /* frags dropped (dups, out of space) */
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ips_fragtimeout, /* fragments timed out */
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ips_forward, /* packets forwarded */
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ips_cantforward, /* packets rcvd for unreachable dest */
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ips_redirectsent, /* packets forwarded on same net */
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ips_noproto, /* unknown or unsupported protocol */
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ips_delivered, /* datagrams delivered to upper level*/
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ips_localout, /* total ip packets generated here */
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ips_odropped, /* lost output packets due to nobufs, etc. */
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ips_reassembled, /* total packets reassembled ok */
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ips_fragmented, /* datagrams successfully fragmented */
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ips_ofragments, /* output fragments created */
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ips_cantfrag, /* don't fragment flag was set, etc. */
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ips_badoptions, /* error in option processing */
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ips_noroute, /* packets discarded due to no route */
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ips_badvers, /* ip version != 4 */
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ips_rawout, /* total raw ip packets generated */
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ips_badfrags, /* malformed fragments (bad length) */
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ips_rcvmemdrop, /* frags dropped for lack of memory */
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ips_toolong, /* ip length > max ip packet size */
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ips_nogif, /* no match gif found */
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ips_badaddr, /* invalid address on header */
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ips_inswcsum, /* software checksummed on input */
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ips_outswcsum, /* software checksummed on output */
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ips_notmember, /* multicasts for unregistered groups */
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ips_rtcachehit, /* valid route to destination found in cache */
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ips_rtcachemiss, /* route cache filled with new destination */
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ips_wrongif, /* packet received on wrong interface */
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ips_idropped, /* lost input packets due to nobufs, etc. */
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ips_ncounters
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};
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extern struct cpumem *ipcounters;
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static inline void
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ipstat_inc(enum ipstat_counters c)
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{
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counters_inc(ipcounters, c);
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}
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static inline void
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ipstat_add(enum ipstat_counters c, uint64_t v)
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{
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counters_add(ipcounters, c, v);
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}
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/*
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* Structure attached to inpcb.ip_moptions and
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* passed to ip_output when IP multicast options are in use.
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*/
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struct ip_moptions {
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struct in_multi **imo_membership; /* group memberships */
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unsigned short imo_ifidx; /* ifp index for outgoing multicasts */
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u_int8_t imo_ttl; /* TTL for outgoing multicasts */
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u_int8_t imo_loop; /* 1 => hear sends if a member */
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u_int16_t imo_num_memberships; /* no. memberships this socket */
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u_int16_t imo_max_memberships; /* max memberships this socket */
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};
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#include <sys/queue.h>
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/*
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* Ip reassembly queue structures.
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*/
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LIST_HEAD(ipqehead, ipqent);
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struct ipqent {
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LIST_ENTRY(ipqent) ipqe_q;
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struct ip *ipqe_ip;
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struct mbuf *ipqe_m; /* mbuf contains packet */
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uint16_t ipqe_mff; /* for IP fragmentation */
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};
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/*
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* Ip reassembly queue structure. Each fragment
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* being reassembled is attached to one of these structures.
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* They are timed out after ipq_ttl drops to 0, and may also
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* be reclaimed if memory becomes tight.
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*/
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struct ipq {
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LIST_ENTRY(ipq) ipq_q; /* to other reass headers */
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u_int8_t ipq_ttl; /* time for reass q to live */
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u_int8_t ipq_p; /* protocol of this fragment */
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u_int16_t ipq_id; /* sequence id for reassembly */
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struct ipqehead ipq_fragq; /* to ip fragment queue */
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struct in_addr ipq_src, ipq_dst;
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};
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struct ipoffnxt {
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int ion_off;
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int ion_nxt;
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};
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/* flags passed to ip_output */
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#define IP_FORWARDING 0x1 /* most of ip header exists */
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#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
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#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
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#define IP_MTUDISC 0x0800 /* pmtu discovery, set DF */
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extern struct ipstat ipstat;
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extern int ip_defttl; /* default IP ttl */
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#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */
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extern int ip_mtudisc; /* mtu discovery */
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extern int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
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extern int ipport_firstauto; /* min port for port allocation */
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extern int ipport_lastauto; /* max port for port allocation */
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extern int ipport_hifirstauto; /* min dynamic/private port number */
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extern int ipport_hilastauto; /* max dynamic/private port number */
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extern int ipforwarding; /* enable IP forwarding */
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#ifdef MROUTING
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extern int ipmforwarding; /* enable multicast forwarding */
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#endif
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extern int ipmultipath; /* enable multipath routing */
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extern unsigned int la_hold_total;
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extern const struct pr_usrreqs rip_usrreqs;
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extern struct rttimer_queue ip_mtudisc_timeout_q;
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extern struct pool ipqent_pool;
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struct rtentry;
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struct route;
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struct inpcb;
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struct ipsec_level;
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int ip_ctloutput(int, struct socket *, int, int, struct mbuf *);
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int ip_fragment(struct mbuf *, struct mbuf_list *, struct ifnet *, u_long);
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void ip_freemoptions(struct ip_moptions *);
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int ip_getmoptions(int, struct ip_moptions *, struct mbuf *);
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void ip_init(void);
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struct mbuf*
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ip_insertoptions(struct mbuf *, struct mbuf *, int *);
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int ip_mforward(struct mbuf *, struct ifnet *);
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int ip_optcopy(struct ip *, struct ip *);
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int ip_output(struct mbuf *, struct mbuf *, struct route *, int,
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struct ip_moptions *, const struct ipsec_level *, u_int32_t);
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u_int16_t
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ip_randomid(void);
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void ip_send(struct mbuf *);
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void ip_send_raw(struct mbuf *);
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void ip_slowtimo(void);
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struct mbuf *
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ip_srcroute(struct mbuf *);
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void ip_stripoptions(struct mbuf *);
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int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
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void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
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struct mbuf *);
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int ip_input_if(struct mbuf **, int *, int, int, struct ifnet *);
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int ip_deliver(struct mbuf **, int *, int, int, int);
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void ip_forward(struct mbuf *, struct ifnet *, struct route *, int);
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int rip_ctloutput(int, struct socket *, int, int, struct mbuf *);
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void rip_init(void);
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int rip_input(struct mbuf **, int *, int, int);
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int rip_output(struct mbuf *, struct socket *, struct sockaddr *,
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struct mbuf *);
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struct mbuf *
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rip_chkhdr(struct mbuf *, struct mbuf *);
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int rip_attach(struct socket *, int, int);
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int rip_detach(struct socket *);
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void rip_lock(struct socket *);
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void rip_unlock(struct socket *);
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int rip_locked(struct socket *);
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int rip_bind(struct socket *, struct mbuf *, struct proc *);
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int rip_connect(struct socket *, struct mbuf *);
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int rip_disconnect(struct socket *);
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int rip_shutdown(struct socket *);
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int rip_send(struct socket *, struct mbuf *, struct mbuf *,
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struct mbuf *);
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#ifdef MROUTING
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extern struct socket *ip_mrouter[]; /* multicast routing daemon */
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#endif
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#endif /* _KERNEL */
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#endif /* _NETINET_IP_VAR_H_ */
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