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/* $OpenBSD: ip_var.h,v 1.109 2023/04/05 21:51:47 bluhm Exp $ */
/* $NetBSD: ip_var.h,v 1.16 1996/02/13 23:43:20 christos 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 8.1 (Berkeley) 6/10/93
*/
#ifndef _NETINET_IP_VAR_H_
#define _NETINET_IP_VAR_H_
/*
* 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
/*
* 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 */
};
struct ipstat {
u_long ips_total; /* total packets received */
u_long ips_badsum; /* checksum bad */
u_long ips_tooshort; /* packet too short */
u_long ips_toosmall; /* not enough data */
u_long ips_badhlen; /* ip header length < data size */
u_long ips_badlen; /* ip length < ip header length */
u_long ips_fragments; /* fragments received */
u_long ips_fragdropped; /* frags dropped (dups, out of space) */
u_long ips_fragtimeout; /* fragments timed out */
u_long ips_forward; /* packets forwarded */
u_long ips_cantforward; /* packets rcvd for unreachable dest */
u_long ips_redirectsent; /* packets forwarded on same net */
u_long ips_noproto; /* unknown or unsupported protocol */
u_long ips_delivered; /* datagrams delivered to upper level*/
u_long ips_localout; /* total ip packets generated here */
u_long ips_odropped; /* lost output due to nobufs, etc. */
u_long ips_reassembled; /* total packets reassembled ok */
u_long ips_fragmented; /* datagrams successfully fragmented */
u_long ips_ofragments; /* output fragments created */
u_long ips_cantfrag; /* don't fragment flag was set, etc. */
u_long ips_badoptions; /* error in option processing */
u_long ips_noroute; /* packets discarded due to no route */
u_long ips_badvers; /* ip version != 4 */
u_long ips_rawout; /* total raw ip packets generated */
u_long ips_badfrags; /* malformed fragments (bad length) */
u_long ips_rcvmemdrop; /* frags dropped for lack of memory */
u_long ips_toolong; /* ip length > max ip packet size */
u_long ips_nogif; /* no match gif found */
u_long ips_badaddr; /* invalid address on header */
u_long ips_inswcsum; /* software checksummed on input */
u_long ips_outswcsum; /* software checksummed on output */
u_long ips_notmember; /* multicasts for unregistered groups */
u_long ips_wrongif; /* packet received on wrong interface */
u_long ips_idropped; /* lost input due to nobufs, etc. */
};
struct ipoption {
struct in_addr ipopt_dst; /* first-hop dst if source routed */
int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
};
#ifdef _KERNEL
#include <sys/percpu.h>
enum ipstat_counters {
ips_total, /* total packets received */
ips_badsum, /* checksum bad */
ips_tooshort, /* packet too short */
ips_toosmall, /* not enough data */
ips_badhlen, /* ip header length < data size */
ips_badlen, /* ip length < ip header length */
ips_fragments, /* fragments received */
ips_fragdropped, /* frags dropped (dups, out of space) */
ips_fragtimeout, /* fragments timed out */
ips_forward, /* packets forwarded */
ips_cantforward, /* packets rcvd for unreachable dest */
ips_redirectsent, /* packets forwarded on same net */
ips_noproto, /* unknown or unsupported protocol */
ips_delivered, /* datagrams delivered to upper level*/
ips_localout, /* total ip packets generated here */
ips_odropped, /* lost output packets due to nobufs, etc. */
ips_reassembled, /* total packets reassembled ok */
ips_fragmented, /* datagrams successfully fragmented */
ips_ofragments, /* output fragments created */
ips_cantfrag, /* don't fragment flag was set, etc. */
ips_badoptions, /* error in option processing */
ips_noroute, /* packets discarded due to no route */
ips_badvers, /* ip version != 4 */
ips_rawout, /* total raw ip packets generated */
ips_badfrags, /* malformed fragments (bad length) */
ips_rcvmemdrop, /* frags dropped for lack of memory */
ips_toolong, /* ip length > max ip packet size */
ips_nogif, /* no match gif found */
ips_badaddr, /* invalid address on header */
ips_inswcsum, /* software checksummed on input */
ips_outswcsum, /* software checksummed on output */
ips_notmember, /* multicasts for unregistered groups */
ips_wrongif, /* packet received on wrong interface */
ips_idropped, /* lost input packets due to nobufs, etc. */
ips_ncounters
};
extern struct cpumem *ipcounters;
static inline void
ipstat_inc(enum ipstat_counters c)
{
counters_inc(ipcounters, c);
}
static inline void
ipstat_add(enum ipstat_counters c, uint64_t v)
{
counters_add(ipcounters, c, v);
}
/*
* Structure attached to inpcb.ip_moptions and
* passed to ip_output when IP multicast options are in use.
*/
struct ip_moptions {
struct in_multi **imo_membership; /* group memberships */
unsigned short imo_ifidx; /* ifp index for outgoing multicasts */
u_int8_t imo_ttl; /* TTL for outgoing multicasts */
u_int8_t imo_loop; /* 1 => hear sends if a member */
u_int16_t imo_num_memberships; /* no. memberships this socket */
u_int16_t imo_max_memberships; /* max memberships this socket */
};
#include <sys/queue.h>
/*
* Ip reassembly queue structures.
*/
LIST_HEAD(ipqehead, ipqent);
struct ipqent {
LIST_ENTRY(ipqent) ipqe_q;
struct ip *ipqe_ip;
struct mbuf *ipqe_m; /* mbuf contains packet */
uint16_t ipqe_mff; /* for IP fragmentation */
};
/*
* Ip reassembly queue structure. Each fragment
* being reassembled is attached to one of these structures.
* They are timed out after ipq_ttl drops to 0, and may also
* be reclaimed if memory becomes tight.
*/
struct ipq {
LIST_ENTRY(ipq) ipq_q; /* to other reass headers */
u_int8_t ipq_ttl; /* time for reass q to live */
u_int8_t ipq_p; /* protocol of this fragment */
u_int16_t ipq_id; /* sequence id for reassembly */
struct ipqehead ipq_fragq; /* to ip fragment queue */
struct in_addr ipq_src, ipq_dst;
};
/* flags passed to ip_output */
#define IP_FORWARDING 0x1 /* most of ip header exists */
#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
#define IP_MTUDISC 0x0800 /* pmtu discovery, set DF */
extern struct ipstat ipstat;
extern int ip_defttl; /* default IP ttl */
#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */
extern int ip_mtudisc; /* mtu discovery */
extern int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
extern int ipport_firstauto; /* min port for port allocation */
extern int ipport_lastauto; /* max port for port allocation */
extern int ipport_hifirstauto; /* min dynamic/private port number */
extern int ipport_hilastauto; /* max dynamic/private port number */
extern int ipforwarding; /* enable IP forwarding */
#ifdef MROUTING
extern int ipmforwarding; /* enable multicast forwarding */
#endif
extern int ipmultipath; /* enable multipath routing */
extern unsigned int la_hold_total;
extern const struct pr_usrreqs rip_usrreqs;
extern struct rttimer_queue ip_mtudisc_timeout_q;
extern struct pool ipqent_pool;
struct route;
struct inpcb;
int ip_ctloutput(int, struct socket *, int, int, struct mbuf *);
int ip_fragment(struct mbuf *, struct mbuf_list *, struct ifnet *, u_long);
void ip_freemoptions(struct ip_moptions *);
int ip_getmoptions(int, struct ip_moptions *, struct mbuf *);
void ip_init(void);
struct mbuf*
ip_insertoptions(struct mbuf *, struct mbuf *, int *);
int ip_mforward(struct mbuf *, struct ifnet *);
int ip_optcopy(struct ip *, struct ip *);
int ip_output(struct mbuf *, struct mbuf *, struct route *, int,
struct ip_moptions *, struct inpcb *, u_int32_t);
u_int16_t
ip_randomid(void);
void ip_send(struct mbuf *);
void ip_send_raw(struct mbuf *);
void ip_slowtimo(void);
struct mbuf *
ip_srcroute(struct mbuf *);
void ip_stripoptions(struct mbuf *);
int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
struct mbuf *);
int ip_input_if(struct mbuf **, int *, int, int, struct ifnet *);
int ip_deliver(struct mbuf **, int *, int, int);
void ip_forward(struct mbuf *, struct ifnet *, struct rtentry *, int);
int rip_ctloutput(int, struct socket *, int, int, struct mbuf *);
void rip_init(void);
int rip_input(struct mbuf **, int *, int, int);
int rip_output(struct mbuf *, struct socket *, struct sockaddr *,
struct mbuf *);
int rip_attach(struct socket *, int, int);
int rip_detach(struct socket *);
void rip_lock(struct socket *);
void rip_unlock(struct socket *);
int rip_bind(struct socket *, struct mbuf *, struct proc *);
int rip_connect(struct socket *, struct mbuf *);
int rip_disconnect(struct socket *);
int rip_shutdown(struct socket *);
int rip_send(struct socket *, struct mbuf *, struct mbuf *,
struct mbuf *);
#ifdef MROUTING
extern struct socket *ip_mrouter[]; /* multicast routing daemon */
#endif
#endif /* _KERNEL */
#endif /* _NETINET_IP_VAR_H_ */
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