231 lines
8.7 KiB
C
231 lines
8.7 KiB
C
/* $NetBSD: ip_var.h,v 1.96 2010/11/05 00:21:51 rmind 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_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);
|
|
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_ */
|