[dragonfly.git] / sys / netinet / ip_var.h

/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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
 * $FreeBSD: src/sys/netinet/ip_var.h,v 1.50.2.13 2003/08/24 08:24:38 hsu Exp $
 */

#ifndef _NETINET_IP_VAR_H_
#define	_NETINET_IP_VAR_H_

#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif
#ifndef _SYS_QUEUE_H_
#include <sys/queue.h>
#endif
#ifndef _NETINET_IN_H_
#include <netinet/in.h>
#endif

#ifdef _KERNEL

#include <machine/endian.h>
#ifndef _MACHINE_PARAM_H_
#include <machine/param.h>
#endif
#ifndef _NET_ROUTE_H
#include <net/route.h>
#endif

#endif

/*
 * Overlay for ip header used by other protocols (tcp, udp).
 */
struct ipovly {
	u_char	ih_x1[9];		/* (unused) */
	u_char	ih_pr;			/* protocol */
	u_short	ih_len;			/* protocol length */
	struct	in_addr ih_src;		/* source internet address */
	struct	in_addr ih_dst;		/* destination internet address */
};

/*
 * 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 {
	TAILQ_ENTRY(ipq) ipq_list;	/* to other reass headers */
	u_char	ipq_ttl;		/* time for reass q to live */
	u_char	ipq_p;			/* protocol of this fragment */
	u_short	ipq_id;			/* sequence id for reassembly */
	struct mbuf *ipq_frags;		/* to ip headers of fragments */
	struct	in_addr ipq_src,ipq_dst;
	u_char	ipq_nfrags;		/* # frags in this packet */
};

/*
 * 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 */
	char	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_char	imo_multicast_ttl;	/* TTL for outgoing multicasts */
	u_char	imo_multicast_loop;	/* 1 => hear sends if a member */
	u_short	imo_num_memberships;	/* no. memberships this socket */
	u_short imo_max_memberships;    /* max memberships this socket */
	struct	in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
	u_long	imo_multicast_vif;	/* vif num outgoing multicasts */
};

/*
 * IP Statistics.
 */
struct	ip_stats {
	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_fastforward;	/* packets fast 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 packets 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_toolong;		/* ip length > max ip packet size */
	u_long	ips_notmember;		/* multicasts for unregistered grps */
	u_long	ips_nogif;		/* no match gif found */
	u_long	ips_badaddr;		/* invalid address on header */
};

#ifdef _KERNEL

#if defined(SMP)
#define ipstat	ipstats_percpu[mycpuid]
#else /* !SMP */
#define ipstat	ipstats_percpu[0]
#endif

extern struct ip_stats	ipstats_percpu[MAXCPU];

/* 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_ROUTETOIF		SO_DONTROUTE	/* bypass routing tables */
#define	IP_ALLOWBROADCAST	SO_BROADCAST	/* can send broadcast packets */
#define	IP_DEBUGROUTE		0x10000		/* debug route */

/* direction passed to ip_cpufn as last parameter */
#define IP_MPORT_IN		0 /* Find lwkt port for incoming packets */
#define IP_MPORT_OUT		1 /* Find lwkt port for outgoing packets */

struct ip;
struct inpcb;
struct route;
struct sockopt;
struct lwkt_port;
struct pktinfo;
union netmsg;

extern u_short	ip_id;				/* ip packet ctr, for ids */
extern int	ip_defttl;			/* default IP ttl */
extern int	ipforwarding;			/* ip forwarding */
extern u_char	ip_protox[];
extern struct socket *ip_rsvpd;		/* reservation protocol daemon */
extern struct socket *ip_mrouter;	/* multicast routing daemon */
extern int	(*legal_vif_num)(int);
extern u_long	(*ip_mcast_src)(int);
extern int rsvp_on;
extern struct	pr_usrreqs rip_usrreqs;

void	 ip_ctloutput(union netmsg *);
void	 ip_drain(void);
int	 ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
	    u_long if_hwassist_flags, int sw_csum);
struct mbuf *
	 ip_reass(struct mbuf *);
void	 ip_freemoptions(struct ip_moptions *);
void	 ip_init(void);
extern int	 (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
			  struct ip_moptions *);

void	ip_cpufn(struct mbuf **, int, int);
void	ip_cpufn_in(struct mbuf **, int);
void	ip_hashcheck(struct mbuf *, const struct pktinfo *);

boolean_t
	 ip_lengthcheck(struct mbuf **, int);
int	 ip_output(struct mbuf *,
	    struct mbuf *, struct route *, int, struct ip_moptions *,
	    struct inpcb *);
struct in_ifaddr *
	 ip_rtaddr(struct in_addr, struct route *);
void	 ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
		struct mbuf *);
void	 ip_slowtimo(void);
struct mbuf *
	 ip_srcroute(struct mbuf *);
void	 ip_stripoptions(struct mbuf *);
u_int16_t ip_randomid(void);
void	rip_ctloutput(union netmsg *);
void	rip_ctlinput(union netmsg *);
void	rip_init(void);
int	rip_input(struct mbuf **, int *, int);
int	rip_output(struct mbuf *, struct socket *, ...);
extern int (*ipip_input)(struct mbuf **, int *, int);
int	rsvp_input(struct mbuf **, int *, int);
int	ip_rsvp_init(struct socket *);
int	ip_rsvp_done(void);
extern int	(*ip_rsvp_vif)(struct socket *, struct sockopt *);
extern void	(*ip_rsvp_force_done)(struct socket *);
extern int	(*rsvp_input_p)(struct mbuf **, int *, int);

extern	struct pfil_head inet_pfil_hook;

void	in_delayed_cksum(struct mbuf *m);

static __inline uint16_t ip_newid(void);
extern int ip_do_randomid;

static __inline uint16_t
ip_newid(void)
{
    if (ip_do_randomid)
	return ip_randomid();
    else
	return __htons(ip_id++);
}

#endif /* _KERNEL */

#endif /* !_NETINET_IP_VAR_H_ */
Commit	Line	Data
984263bc MD	1	/*
	2	* Copyright (c) 1982, 1986, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
	33	* @(#)ip_var.h 8.2 (Berkeley) 1/9/95
f1f552f6	34	* $FreeBSD: src/sys/netinet/ip_var.h,v 1.50.2.13 2003/08/24 08:24:38 hsu Exp $
984263bc MD	35	*/
	36
	37	#ifndef _NETINET_IP_VAR_H_
	38	#define _NETINET_IP_VAR_H_
	39
1bd40720 MD	40	#ifndef _SYS_TYPES_H_
	41	#include <sys/types.h>
	42	#endif
	43	#ifndef _SYS_QUEUE_H_
984263bc	44	#include <sys/queue.h>
1bd40720 MD	45	#endif
	46	#ifndef _NETINET_IN_H_
	47	#include <netinet/in.h>
	48	#endif
	49
	50	#ifdef _KERNEL
	51
1bd40720	52	#include <machine/endian.h>
1bd40720 MD	53	#ifndef _MACHINE_PARAM_H_
	54	#include <machine/param.h>
	55	#endif
70068ffd SW	56	#ifndef _NET_ROUTE_H
	57	#include <net/route.h>
	58	#endif
1bd40720 MD	59
1bd40720 MD	60	#endif
984263bc MD	61
	62	/*
	63	* Overlay for ip header used by other protocols (tcp, udp).
	64	*/
	65	struct ipovly {
	66	u_char ih_x1[9]; /* (unused) */
	67	u_char ih_pr; /* protocol */
	68	u_short ih_len; /* protocol length */
	69	struct in_addr ih_src; /* source internet address */
	70	struct in_addr ih_dst; /* destination internet address */
	71	};
	72
	73	/*
	74	* Ip reassembly queue structure. Each fragment
	75	* being reassembled is attached to one of these structures.
	76	* They are timed out after ipq_ttl drops to 0, and may also
	77	* be reclaimed if memory becomes tight.
	78	*/
	79	struct ipq {
83c38804	80	TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
984263bc MD	81	u_char ipq_ttl; /* time for reass q to live */
	82	u_char ipq_p; /* protocol of this fragment */
	83	u_short ipq_id; /* sequence id for reassembly */
	84	struct mbuf ipq_frags; / to ip headers of fragments */
	85	struct in_addr ipq_src,ipq_dst;
	86	u_char ipq_nfrags; /* # frags in this packet */
984263bc MD	87	};
	88
	89	/*
	90	* Structure stored in mbuf in inpcb.ip_options
	91	* and passed to ip_output when ip options are in use.
	92	* The actual length of the options (including ipopt_dst)
	93	* is in m_len.
	94	*/
	95	#define MAX_IPOPTLEN 40
	96
	97	struct ipoption {
	98	struct in_addr ipopt_dst; /* first-hop dst if source routed */
	99	char ipopt_list[MAX_IPOPTLEN]; /* options proper */
	100	};
	101
	102	/*
	103	* Structure attached to inpcb.ip_moptions and
	104	* passed to ip_output when IP multicast options are in use.
	105	*/
	106	struct ip_moptions {
	107	struct ifnet imo_multicast_ifp; / ifp for outgoing multicasts */
	108	struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
	109	u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
	110	u_char imo_multicast_loop; /* 1 => hear sends if a member */
	111	u_short imo_num_memberships; /* no. memberships this socket */
0d16ba1d	112	u_short imo_max_memberships; /* max memberships this socket */
984263bc MD	113	struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
	114	u_long imo_multicast_vif; /* vif num outgoing multicasts */
	115	};
	116
fc9c7b4f HP	117	/*
	118	* IP Statistics.
	119	*/
	120	struct ip_stats {
984263bc MD	121	u_long ips_total; /* total packets received */
	122	u_long ips_badsum; /* checksum bad */
	123	u_long ips_tooshort; /* packet too short */
	124	u_long ips_toosmall; /* not enough data */
	125	u_long ips_badhlen; /* ip header length < data size */
	126	u_long ips_badlen; /* ip length < ip header length */
	127	u_long ips_fragments; /* fragments received */
	128	u_long ips_fragdropped; /* frags dropped (dups, out of space) */
	129	u_long ips_fragtimeout; /* fragments timed out */
	130	u_long ips_forward; /* packets forwarded */
	131	u_long ips_fastforward; /* packets fast forwarded */
	132	u_long ips_cantforward; /* packets rcvd for unreachable dest */
	133	u_long ips_redirectsent; /* packets forwarded on same net */
	134	u_long ips_noproto; /* unknown or unsupported protocol */
	135	u_long ips_delivered; /* datagrams delivered to upper level*/
	136	u_long ips_localout; /* total ip packets generated here */
	137	u_long ips_odropped; /* lost packets due to nobufs, etc. */
	138	u_long ips_reassembled; /* total packets reassembled ok */
	139	u_long ips_fragmented; /* datagrams successfully fragmented */
	140	u_long ips_ofragments; /* output fragments created */
	141	u_long ips_cantfrag; /* don't fragment flag was set, etc. */
	142	u_long ips_badoptions; /* error in option processing */
	143	u_long ips_noroute; /* packets discarded due to no route */
	144	u_long ips_badvers; /* ip version != 4 */
	145	u_long ips_rawout; /* total raw ip packets generated */
	146	u_long ips_toolong; /* ip length > max ip packet size */
	147	u_long ips_notmember; /* multicasts for unregistered grps */
	148	u_long ips_nogif; /* no match gif found */
	149	u_long ips_badaddr; /* invalid address on header */
	150	};
	151
	152	#ifdef _KERNEL
	153
70068ffd SW	154	#if defined(SMP)
	155	#define ipstat ipstats_percpu[mycpuid]
	156	#else /* !SMP */
	157	#define ipstat ipstats_percpu[0]
	158	#endif
	159
	160	extern struct ip_stats ipstats_percpu[MAXCPU];
	161
984263bc MD	162	/* flags passed to ip_output as last parameter */
	163	#define IP_FORWARDING 0x1 /* most of ip header exists */
	164	#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
	165	#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
	166	#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
facaabe1	167	#define IP_DEBUGROUTE 0x10000 /* debug route */
984263bc	168
c3c96e44	169	/* direction passed to ip_cpufn as last parameter */
934c6849 SZ	170	#define IP_MPORT_IN 0 /* Find lwkt port for incoming packets */
	171	#define IP_MPORT_OUT 1 /* Find lwkt port for outgoing packets */
	172
984263bc MD	173	struct ip;
	174	struct inpcb;
	175	struct route;
	176	struct sockopt;
bf82f9b7	177	struct lwkt_port;
8a5c0ed6	178	struct pktinfo;
002c1265	179	union netmsg;
984263bc	180
984263bc	181	extern u_short ip_id; /* ip packet ctr, for ids */
984263bc MD	182	extern int ip_defttl; /* default IP ttl */
984263bc MD	183	extern int ipforwarding; /* ip forwarding */
984263bc	184	extern u_char ip_protox[];
ecdefdda MD	185	extern struct socket ip_rsvpd; / reservation protocol daemon */
ecdefdda MD	186	extern struct socket ip_mrouter; / multicast routing daemon */
984263bc MD	187	extern int (*legal_vif_num)(int);
	188	extern u_long (*ip_mcast_src)(int);
	189	extern int rsvp_on;
	190	extern struct pr_usrreqs rip_usrreqs;
	191
002c1265	192	void ip_ctloutput(union netmsg *);
984263bc	193	void ip_drain(void);
f1f552f6 JH	194	int ip_fragment(struct ip ip, struct mbuf *m_frag, int mtu,
f1f552f6 JH	195	u_long if_hwassist_flags, int sw_csum);
0030d31a SZ	196	struct mbuf *
0030d31a SZ	197	ip_reass(struct mbuf *);
984263bc MD	198	void ip_freemoptions(struct ip_moptions *);
	199	void ip_init(void);
	200	extern int (ip_mforward)(struct ip , struct ifnet , struct mbuf ,
	201	struct ip_moptions *);
48e7b118	202
c3c96e44 MD	203	void ip_cpufn(struct mbuf **, int, int);
c3c96e44 MD	204	void ip_cpufn_in(struct mbuf **, int);
e6f77b88	205	void ip_hashcheck(struct mbuf , const struct pktinfo );
48e7b118	206
1e316d14	207	boolean_t
c3c96e44	208	ip_lengthcheck(struct mbuf **, int);
984263bc MD	209	int ip_output(struct mbuf *,
	210	struct mbuf , struct route , int, struct ip_moptions *,
	211	struct inpcb *);
	212	struct in_ifaddr *
	213	ip_rtaddr(struct in_addr, struct route *);
	214	void ip_savecontrol(struct inpcb , struct mbuf , struct ip ,
	215	struct mbuf *);
	216	void ip_slowtimo(void);
	217	struct mbuf *
7e31206a	218	ip_srcroute(struct mbuf *);
bddf0751	219	void ip_stripoptions(struct mbuf *);
6277137d	220	u_int16_t ip_randomid(void);
002c1265 MD	221	void rip_ctloutput(union netmsg *);
002c1265 MD	222	void rip_ctlinput(union netmsg *);
984263bc	223	void rip_init(void);
002c1265	224	int rip_input(struct mbuf *, int , int);
deffea2e	225	int rip_output(struct mbuf , struct socket , ...);
002c1265 MD	226	extern int (ipip_input)(struct mbuf , int , int);
002c1265 MD	227	int rsvp_input(struct mbuf *, int , int);
984263bc MD	228	int ip_rsvp_init(struct socket *);
	229	int ip_rsvp_done(void);
	230	extern int (ip_rsvp_vif)(struct socket , struct sockopt *);
	231	extern void (ip_rsvp_force_done)(struct socket );
002c1265	232	extern int (rsvp_input_p)(struct mbuf , int , int);
984263bc	233
e7e55f42	234	extern struct pfil_head inet_pfil_hook;
e7e55f42	235
984263bc MD	236	void in_delayed_cksum(struct mbuf *m);
984263bc MD	237
6277137d MD	238	static __inline uint16_t ip_newid(void);
	239	extern int ip_do_randomid;
	240
	241	static __inline uint16_t
	242	ip_newid(void)
	243	{
	244	if (ip_do_randomid)
	245	return ip_randomid();
	246	else
1bd40720	247	return __htons(ip_id++);
6277137d MD	248	}
6277137d MD	249
984263bc MD	250	#endif /* _KERNEL */
	251
	252	#endif /* !_NETINET_IP_VAR_H_ */