254 lines
9.5 KiB
C
254 lines
9.5 KiB
C
/* $NetBSD: ip_var.h,v 1.108 2015/06/04 09:20:00 ozaki-r 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 8.2 (Berkeley) 1/9/95
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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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#include <sys/queue.h>
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#include <net/route.h>
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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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} __packed;
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/*
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* IP Flow structure
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*/
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struct ipflow {
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LIST_ENTRY(ipflow) ipf_list; /* next in active list */
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LIST_ENTRY(ipflow) ipf_hash; /* next ipflow in bucket */
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struct in_addr ipf_dst; /* destination address */
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struct in_addr ipf_src; /* source address */
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uint8_t ipf_tos; /* type-of-service */
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struct route ipf_ro; /* associated route entry */
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u_long ipf_uses; /* number of uses in this period */
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u_long ipf_last_uses; /* number of uses in last period */
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u_long ipf_dropped; /* ENOBUFS retured by if_output */
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u_long ipf_errors; /* other errors returned by if_output */
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u_int ipf_timer; /* lifetime timer */
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};
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/*
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* IP sequence queue structure.
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*
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* XXX -- The following explains why the ipqe_m field is here, for TCP's use:
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* We want to avoid doing m_pullup on incoming packets but that
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* means avoiding dtom on the tcp reassembly code. That in turn means
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* keeping an mbuf pointer in the reassembly queue (since we might
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* have a cluster). As a quick hack, the source & destination
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* port numbers (which are no longer needed once we've located the
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* tcpcb) are overlayed with an mbuf pointer.
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*/
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TAILQ_HEAD(ipqehead, ipqent);
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struct ipqent {
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TAILQ_ENTRY(ipqent) ipqe_q;
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union {
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struct ip *_ip;
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struct tcpiphdr *_tcp;
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} _ipqe_u1;
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struct mbuf *ipqe_m; /* point to first mbuf */
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struct mbuf *ipre_mlast; /* point to last mbuf */
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u_int8_t ipqe_mff; /* for IP fragmentation */
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/*
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* The following are used in TCP reassembly
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*/
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TAILQ_ENTRY(ipqent) ipqe_timeq;
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u_int32_t ipqe_seq;
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u_int32_t ipqe_len;
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u_int32_t ipqe_flags;
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};
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#define ipqe_tcp _ipqe_u1._tcp
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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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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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/*
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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 ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
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struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
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u_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */
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u_int8_t imo_multicast_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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struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
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};
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/*
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* IP statistics.
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* Each counter is an unsigned 64-bit value.
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*/
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#define IP_STAT_TOTAL 0 /* total packets received */
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#define IP_STAT_BADSUM 1 /* checksum bad */
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#define IP_STAT_TOOSHORT 2 /* packet too short */
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#define IP_STAT_TOOSMALL 3 /* not enough data */
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#define IP_STAT_BADHLEN 4 /* ip header length < data size */
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#define IP_STAT_BADLEN 5 /* ip length < ip header length */
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#define IP_STAT_FRAGMENTS 6 /* fragments received */
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#define IP_STAT_FRAGDROPPED 7 /* frags dropped (dups, out of space) */
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#define IP_STAT_FRAGTIMEOUT 8 /* fragments timed out */
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#define IP_STAT_FORWARD 9 /* packets forwarded */
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#define IP_STAT_FASTFORWARD 10 /* packets fast forwarded */
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#define IP_STAT_CANTFORWARD 11 /* packets rcvd for unreachable dest */
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#define IP_STAT_REDIRECTSENT 12 /* packets forwareded on same net */
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#define IP_STAT_NOPROTO 13 /* unknown or unsupported protocol */
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#define IP_STAT_DELIVERED 14 /* datagrams delivered to upper level */
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#define IP_STAT_LOCALOUT 15 /* total ip packets generated here */
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#define IP_STAT_ODROPPED 16 /* lost packets due to nobufs, etc. */
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#define IP_STAT_REASSEMBLED 17 /* total packets reassembled ok */
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#define IP_STAT_FRAGMENTED 18 /* datagrams successfully fragmented */
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#define IP_STAT_OFRAGMENTS 19 /* output fragments created */
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#define IP_STAT_CANTFRAG 20 /* don't fragment flag was set, etc. */
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#define IP_STAT_BADOPTIONS 21 /* error in option processing */
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#define IP_STAT_NOROUTE 22 /* packets discarded due to no route */
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#define IP_STAT_BADVERS 23 /* ip version != 4 */
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#define IP_STAT_RAWOUT 24 /* total raw ip packets generated */
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#define IP_STAT_BADFRAGS 25 /* malformed fragments (bad length) */
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#define IP_STAT_RCVMEMDROP 26 /* frags dropped for lack of memory */
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#define IP_STAT_TOOLONG 27 /* ip length > max ip packet size */
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#define IP_STAT_NOGIF 28 /* no match gif found */
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#define IP_STAT_BADADDR 29 /* invalid address on header */
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#define IP_NSTATS 30
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#ifdef _KERNEL
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#ifdef _KERNEL_OPT
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#include "opt_gateway.h"
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#include "opt_mbuftrace.h"
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#endif
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/*
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* The following flags can be passed to ip_output() as last parameter
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*/
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#define IP_FORWARDING 0x0001 /* most of ip header exists */
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#define IP_RAWOUTPUT 0x0002 /* raw ip header exists */
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#define IP_RETURNMTU 0x0004 /* pass back mtu on EMSGSIZE */
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#define IP_NOIPNEWID 0x0008 /* don't fill in ip_id */
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__CTASSERT(SO_DONTROUTE == 0x0010);
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__CTASSERT(SO_BROADCAST == 0x0020);
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#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
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#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
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#define IP_IGMP_MCAST 0x0040 /* IGMP for mcast join/leave */
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#define IP_MTUDISC 0x0400 /* Path MTU Discovery; set DF */
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extern struct domain inetdomain;
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extern const struct pr_usrreqs rip_usrreqs;
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extern int ip_defttl; /* default IP ttl */
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extern int ipforwarding; /* ip forwarding */
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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 anonportmin; /* minimum ephemeral port */
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extern int anonportmax; /* maximum ephemeral port */
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extern int lowportmin; /* minimum reserved port */
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extern int lowportmax; /* maximum reserved port */
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extern int ip_do_loopback_cksum; /* do IP checksum on loopback? */
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extern struct rttimer_queue *ip_mtudisc_timeout_q;
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#ifdef MBUFTRACE
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extern struct mowner ip_rx_mowner;
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extern struct mowner ip_tx_mowner;
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#endif
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struct inpcb;
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struct sockopt;
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void ip_init(void);
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void in_init(void);
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int ip_ctloutput(int, struct socket *, struct sockopt *);
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void ip_drain(void);
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void ip_drainstub(void);
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void ip_freemoptions(struct ip_moptions *);
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int ip_optcopy(struct ip *, struct ip *);
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u_int ip_optlen(struct inpcb *);
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int ip_output(struct mbuf *, ...);
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int ip_fragment(struct mbuf *, struct ifnet *, u_long);
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void ip_reass_init(void);
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int ip_reass_packet(struct mbuf **, struct ip *);
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void ip_reass_slowtimo(void);
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void ip_reass_drain(void);
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void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
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struct mbuf *);
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void ip_slowtimo(void);
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void ip_fasttimo(void);
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struct mbuf *
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ip_srcroute(void);
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int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
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void ip_statinc(u_int);
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void * rip_ctlinput(int, const struct sockaddr *, void *);
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int rip_ctloutput(int, struct socket *, struct sockopt *);
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void rip_init(void);
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void rip_input(struct mbuf *, ...);
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int rip_output(struct mbuf *, ...);
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int rip_usrreq(struct socket *,
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int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
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int ip_setmoptions(struct ip_moptions **, const struct sockopt *sopt);
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int ip_getmoptions(struct ip_moptions *, struct sockopt *sopt);
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int ip_hresolv_output(struct ifnet * const, struct mbuf * const,
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const struct sockaddr * const, struct rtentry *);
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/* IP Flow interface. */
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void ipflow_init(void);
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void ipflow_poolinit(void);
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struct ipflow *ipflow_reap(bool);
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void ipflow_create(const struct route *, struct mbuf *);
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void ipflow_slowtimo(void);
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int ipflow_invalidate_all(int);
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#endif /* _KERNEL */
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#endif /* !_NETINET_IP_VAR_H_ */
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