sys/netinet/ip_var.h
C Header | 232 lines | 149 code | 20 blank | 63 comment | 0 complexity | 7c928efedd77c0991a4542a534c886fb MD5 | raw file
Possible License(s): MIT, WTFPL, AGPL-1.0, BSD-3-Clause, GPL-3.0, LGPL-2.0, JSON, 0BSD
- /* $NetBSD: ip_var.h,v 1.97 2011/05/03 17:44:31 dyoung Exp $ */
- /*
- * Copyright (c) 1982, 1986, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
- */
- #ifndef _NETINET_IP_VAR_H_
- #define _NETINET_IP_VAR_H_
- #include <sys/queue.h>
- #include <net/route.h>
- /*
- * Overlay for ip header used by other protocols (tcp, udp).
- */
- struct ipovly {
- u_int8_t ih_x1[9]; /* (unused) */
- u_int8_t ih_pr; /* protocol */
- u_int16_t ih_len; /* protocol length */
- struct in_addr ih_src; /* source internet address */
- struct in_addr ih_dst; /* destination internet address */
- } __packed;
- /*
- * IP sequence queue structure.
- *
- * XXX -- The following explains why the ipqe_m field is here, for TCP's use:
- * We want to avoid doing m_pullup on incoming packets but that
- * means avoiding dtom on the tcp reassembly code. That in turn means
- * keeping an mbuf pointer in the reassembly queue (since we might
- * have a cluster). As a quick hack, the source & destination
- * port numbers (which are no longer needed once we've located the
- * tcpcb) are overlayed with an mbuf pointer.
- */
- TAILQ_HEAD(ipqehead, ipqent);
- struct ipqent {
- TAILQ_ENTRY(ipqent) ipqe_q;
- union {
- struct ip *_ip;
- struct tcpiphdr *_tcp;
- } _ipqe_u1;
- struct mbuf *ipqe_m; /* point to first mbuf */
- struct mbuf *ipre_mlast; /* point to last mbuf */
- u_int8_t ipqe_mff; /* for IP fragmentation */
- /*
- * The following are used in TCP reassembly
- */
- TAILQ_ENTRY(ipqent) ipqe_timeq;
- u_int32_t ipqe_seq;
- u_int32_t ipqe_len;
- u_int32_t ipqe_flags;
- };
- #define ipqe_tcp _ipqe_u1._tcp
- /*
- * Structure stored in mbuf in inpcb.ip_options
- * and passed to ip_output when ip options are in use.
- * The actual length of the options (including ipopt_dst)
- * is in m_len.
- */
- #define MAX_IPOPTLEN 40
- struct ipoption {
- struct in_addr ipopt_dst; /* first-hop dst if source routed */
- int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
- };
- /*
- * Structure attached to inpcb.ip_moptions and
- * passed to ip_output when IP multicast options are in use.
- */
- struct ip_moptions {
- struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
- struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
- u_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */
- u_int8_t imo_multicast_loop; /* 1 => hear sends if a member */
- u_int16_t imo_num_memberships; /* no. memberships this socket */
- struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
- };
- /*
- * IP statistics.
- * Each counter is an unsigned 64-bit value.
- */
- #define IP_STAT_TOTAL 0 /* total packets received */
- #define IP_STAT_BADSUM 1 /* checksum bad */
- #define IP_STAT_TOOSHORT 2 /* packet too short */
- #define IP_STAT_TOOSMALL 3 /* not enough data */
- #define IP_STAT_BADHLEN 4 /* ip header length < data size */
- #define IP_STAT_BADLEN 5 /* ip length < ip header length */
- #define IP_STAT_FRAGMENTS 6 /* fragments received */
- #define IP_STAT_FRAGDROPPED 7 /* frags dropped (dups, out of space) */
- #define IP_STAT_FRAGTIMEOUT 8 /* fragments timed out */
- #define IP_STAT_FORWARD 9 /* packets forwarded */
- #define IP_STAT_FASTFORWARD 10 /* packets fast forwarded */
- #define IP_STAT_CANTFORWARD 11 /* packets rcvd for unreachable dest */
- #define IP_STAT_REDIRECTSENT 12 /* packets forwareded on same net */
- #define IP_STAT_NOPROTO 13 /* unknown or unsupported protocol */
- #define IP_STAT_DELIVERED 14 /* datagrams delivered to upper level */
- #define IP_STAT_LOCALOUT 15 /* total ip packets generated here */
- #define IP_STAT_ODROPPED 16 /* lost packets due to nobufs, etc. */
- #define IP_STAT_REASSEMBLED 17 /* total packets reassembled ok */
- #define IP_STAT_FRAGMENTED 18 /* datagrams successfully fragmented */
- #define IP_STAT_OFRAGMENTS 19 /* output fragments created */
- #define IP_STAT_CANTFRAG 20 /* don't fragment flag was set, etc. */
- #define IP_STAT_BADOPTIONS 21 /* error in option processing */
- #define IP_STAT_NOROUTE 22 /* packets discarded due to no route */
- #define IP_STAT_BADVERS 23 /* ip version != 4 */
- #define IP_STAT_RAWOUT 24 /* total raw ip packets generated */
- #define IP_STAT_BADFRAGS 25 /* malformed fragments (bad length) */
- #define IP_STAT_RCVMEMDROP 26 /* frags dropped for lack of memory */
- #define IP_STAT_TOOLONG 27 /* ip length > max ip packet size */
- #define IP_STAT_NOGIF 28 /* no match gif found */
- #define IP_STAT_BADADDR 29 /* invalid address on header */
- #define IP_NSTATS 30
- #ifdef _KERNEL
- #ifdef _KERNEL_OPT
- #include "opt_gateway.h"
- #include "opt_mbuftrace.h"
- #endif
- /* flags passed to ip_output as last parameter */
- #define IP_FORWARDING 0x1 /* most of ip header exists */
- #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
- #define IP_RETURNMTU 0x4 /* pass back mtu on EMSGSIZE */
- #define IP_NOIPNEWID 0x8 /* don't fill in ip_id */
- #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
- #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
- #define IP_MTUDISC 0x0400 /* Path MTU Discovery; set DF */
- extern struct domain inetdomain;
- extern int ip_defttl; /* default IP ttl */
- extern int ipforwarding; /* ip forwarding */
- extern int ip_mtudisc; /* mtu discovery */
- extern int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
- extern int anonportmin; /* minimum ephemeral port */
- extern int anonportmax; /* maximum ephemeral port */
- extern int lowportmin; /* minimum reserved port */
- extern int lowportmax; /* maximum reserved port */
- extern int ip_do_loopback_cksum; /* do IP checksum on loopback? */
- extern struct rttimer_queue *ip_mtudisc_timeout_q;
- #ifdef MBUFTRACE
- extern struct mowner ip_rx_mowner;
- extern struct mowner ip_tx_mowner;
- #endif
- #ifdef GATEWAY
- extern int ip_maxflows;
- extern int ip_hashsize;
- #endif
- extern struct pool inmulti_pool;
- struct inpcb;
- struct sockopt;
- int ip_ctloutput(int, struct socket *, struct sockopt *);
- int ip_dooptions(struct mbuf *);
- void ip_drain(void);
- void ip_drainstub(void);
- void ip_forward(struct mbuf *, int);
- void ip_freemoptions(struct ip_moptions *);
- int ip_getmoptions(struct ip_moptions *, struct sockopt *);
- void ip_init(void);
- int ip_optcopy(struct ip *, struct ip *);
- u_int ip_optlen(struct inpcb *);
- int ip_output(struct mbuf *, ...);
- int ip_fragment(struct mbuf *, struct ifnet *, u_long);
- int ip_pcbopts(struct mbuf **, const struct sockopt *);
- void ip_reass_init(void);
- int ip_reass_packet(struct mbuf **, struct ip *);
- void ip_reass_slowtimo(void);
- void ip_reass_drain(void);
- struct in_ifaddr *
- ip_rtaddr(struct in_addr);
- void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
- struct mbuf *);
- int ip_setmoptions(struct ip_moptions **, const struct sockopt *);
- void ip_slowtimo(void);
- void ip_fasttimo(void);
- struct mbuf *
- ip_srcroute(void);
- int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
- void ip_statinc(u_int);
- void ipintr(void);
- void * rip_ctlinput(int, const struct sockaddr *, void *);
- int rip_ctloutput(int, struct socket *, struct sockopt *);
- void rip_init(void);
- void rip_input(struct mbuf *, ...);
- int rip_output(struct mbuf *, ...);
- int rip_usrreq(struct socket *,
- int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
- int ipflow_init(int);
- void ipflow_poolinit(void);
- void ipflow_prune(void);
- void ipflow_create(const struct route *, struct mbuf *);
- void ipflow_slowtimo(void);
- int ipflow_invalidate_all(int);
- #endif /* _KERNEL */
- #endif /* !_NETINET_IP_VAR_H_ */