/* * 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 */#include <endian.h>/* * Overlay for ip header used by other protocols (tcp, udp). */struct ipovly {	u_char	ih_x1[9];		/* (unused) */	u_char	ih_pr;			/* protocol */	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 {	struct	ipq *next,*prev;	/* 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	ipasfrag *ipq_next,*ipq_prev;					/* to ip headers of fragments */	struct	in_addr ipq_src,ipq_dst;};/* * Ip header, when holding a fragment. * * Note: ipf_next must be at same offset as ipq_next above */struct	ipasfrag {#if BYTE_ORDER == LITTLE_ENDIAN 	u_char	ip_hl:4,		ip_v:4;#endif#if BYTE_ORDER == BIG_ENDIAN 	u_char	ip_v:4,		ip_hl:4;#endif	u_char	ipf_mff;		/* XXX overlays ip_tos: use low bit					 * to avoid destroying tos;					 * copied from (ip_off&IP_MF) */	short	ip_len;	u_short	ip_id;	short	ip_off;	u_char	ip_ttl;	u_char	ip_p;	u_short	ip_sum;	struct	ipasfrag *ipf_next;	/* next fragment */	struct	ipasfrag *ipf_prev;	/* previous fragment */};/* * 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	40struct ipoption {	struct	in_addr ipopt_dst;	/* first-hop dst if source routed */	char	ipopt_list[MAX_IPOPTLEN];	/* options proper */};struct	ipstat {	n_long	ips_total;		/* total packets received */	n_long	ips_badsum;		/* checksum bad */	n_long	ips_tooshort;		/* packet too short */	n_long	ips_toosmall;		/* not enough data */	n_long	ips_badhlen;		/* ip header length < data size */	n_long	ips_badlen;		/* ip length < ip header length */	n_long	ips_fragments;		/* fragments received */	n_long	ips_fragdropped;	/* frags dropped (dups, out of space) */	n_long	ips_fragtimeout;	/* fragments timed out */	n_long	ips_forward;		/* packets forwarded */	n_long	ips_cantforward;	/* packets rcvd for unreachable dest */	n_long	ips_redirectsent;	/* packets forwarded on same net */	n_long	ips_noproto;		/* unknown or unsupported protocol */	n_long	ips_delivered;		/* datagrams delivered to upper level*/	n_long	ips_localout;		/* total ip packets generated here */	n_long	ips_odropped;		/* lost packets due to nobufs, etc. */	n_long	ips_reassembled;	/* total packets reassembled ok */	n_long	ips_fragmented;		/* datagrams sucessfully fragmented */	n_long	ips_ofragments;		/* output fragments created */	n_long	ips_cantfrag;		/* don't fragment flag was set, etc. */	n_long	ips_badoptions;		/* error in option processing */	n_long	ips_noroute;		/* packets discarded due to no route */	n_long	ips_badvers;		/* ip version != 4 */	n_long	ips_rawout;		/* total raw ip packets generated */};#ifdef KERNEL/* 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 */struct	ipstat	ipstat;struct	ipq	ipq;			/* ip reass. queue */u_short	ip_id;				/* ip packet ctr, for ids */int	ip_defttl;			/* default IP ttl */int	 in_control __P((struct socket *, n_long, caddr_t, struct ifnet *));int	 ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));void	 ip_deq __P((struct ipasfrag *));int	 ip_dooptions __P((struct mbuf *));void	 ip_drain __P((void));void	 ip_enq __P((struct ipasfrag *, struct ipasfrag *));void	 ip_forward __P((struct mbuf *, int));void	 ip_freef __P((struct ipq *));void	 ip_freemoptions __P((struct ip_moptions *));int	 ip_getmoptions __P((int, struct ip_moptions *, struct mbuf **));void	 ip_init __P((void));int	 ip_mforward __P((struct mbuf *, struct ifnet *));int	 ip_optcopy __P((struct ip *, struct ip *));int	 ip_output __P((struct mbuf *,	    struct mbuf *, struct route *, int, struct ip_moptions *));int	 ip_pcbopts __P((struct mbuf **, struct mbuf *));struct ip *	 ip_reass __P((struct ipasfrag *, struct ipq *));struct in_ifaddr *	 ip_rtaddr __P((struct in_addr));int	 ip_setmoptions __P((int, struct ip_moptions **, struct mbuf *));void	 ip_slowtimo __P((void));struct mbuf *	 ip_srcroute __P((void));void	 ip_stripoptions __P((struct mbuf *, struct mbuf *));int	 ip_sysctl __P((int *, n_long, void *, size_t *, void *, size_t));void	 ipintr __P((void));int	 rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));void	 rip_init __P((void));void	 rip_input __P((struct mbuf *));int	 rip_output __P((struct mbuf *, struct socket *, n_long));int	 rip_usrreq __P((struct socket *,	    int, struct mbuf *, struct mbuf *, struct mbuf *));#endif