xref: /freebsd/sys/netinet/ip_var.h (revision 82cea7e6f3da448dfadd071ac81f4a0b1e41a356)
1c398230bSWarner Losh /*-
2df8bae1dSRodney W. Grimes  * Copyright (c) 1982, 1986, 1993
3df8bae1dSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
4df8bae1dSRodney W. Grimes  *
5df8bae1dSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
6df8bae1dSRodney W. Grimes  * modification, are permitted provided that the following conditions
7df8bae1dSRodney W. Grimes  * are met:
8df8bae1dSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
9df8bae1dSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
10df8bae1dSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
11df8bae1dSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
12df8bae1dSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
13df8bae1dSRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
14df8bae1dSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
15df8bae1dSRodney W. Grimes  *    without specific prior written permission.
16df8bae1dSRodney W. Grimes  *
17df8bae1dSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18df8bae1dSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19df8bae1dSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20df8bae1dSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21df8bae1dSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22df8bae1dSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23df8bae1dSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24df8bae1dSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25df8bae1dSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26df8bae1dSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27df8bae1dSRodney W. Grimes  * SUCH DAMAGE.
28df8bae1dSRodney W. Grimes  *
293271ad14SGarrett Wollman  *	@(#)ip_var.h	8.2 (Berkeley) 1/9/95
30c3aac50fSPeter Wemm  * $FreeBSD$
31df8bae1dSRodney W. Grimes  */
32df8bae1dSRodney W. Grimes 
33707f139eSPaul Richards #ifndef _NETINET_IP_VAR_H_
34707f139eSPaul Richards #define	_NETINET_IP_VAR_H_
35707f139eSPaul Richards 
3633841545SHajimu UMEMOTO #include <sys/queue.h>
3733841545SHajimu UMEMOTO 
38df8bae1dSRodney W. Grimes /*
39df8bae1dSRodney W. Grimes  * Overlay for ip header used by other protocols (tcp, udp).
40df8bae1dSRodney W. Grimes  */
41df8bae1dSRodney W. Grimes struct ipovly {
426effc713SDoug Rabson 	u_char	ih_x1[9];		/* (unused) */
43df8bae1dSRodney W. Grimes 	u_char	ih_pr;			/* protocol */
44430d30d8SBill Fenner 	u_short	ih_len;			/* protocol length */
45df8bae1dSRodney W. Grimes 	struct	in_addr ih_src;		/* source internet address */
46df8bae1dSRodney W. Grimes 	struct	in_addr ih_dst;		/* destination internet address */
47df8bae1dSRodney W. Grimes };
48df8bae1dSRodney W. Grimes 
4969dac2eaSRobert Watson #ifdef _KERNEL
50df8bae1dSRodney W. Grimes /*
51df8bae1dSRodney W. Grimes  * Ip reassembly queue structure.  Each fragment
52df8bae1dSRodney W. Grimes  * being reassembled is attached to one of these structures.
53df8bae1dSRodney W. Grimes  * They are timed out after ipq_ttl drops to 0, and may also
54df8bae1dSRodney W. Grimes  * be reclaimed if memory becomes tight.
55df8bae1dSRodney W. Grimes  */
56df8bae1dSRodney W. Grimes struct ipq {
57462b86feSPoul-Henning Kamp 	TAILQ_ENTRY(ipq) ipq_list;	/* to other reass headers */
58df8bae1dSRodney W. Grimes 	u_char	ipq_ttl;		/* time for reass q to live */
59df8bae1dSRodney W. Grimes 	u_char	ipq_p;			/* protocol of this fragment */
60df8bae1dSRodney W. Grimes 	u_short	ipq_id;			/* sequence id for reassembly */
616effc713SDoug Rabson 	struct mbuf *ipq_frags;		/* to ip headers of fragments */
62df8bae1dSRodney W. Grimes 	struct	in_addr ipq_src,ipq_dst;
63375386e2SMike Silbersack 	u_char	ipq_nfrags;		/* # frags in this packet */
64eca8a663SRobert Watson 	struct label *ipq_label;	/* MAC label */
65df8bae1dSRodney W. Grimes };
6669dac2eaSRobert Watson #endif /* _KERNEL */
67df8bae1dSRodney W. Grimes 
68df8bae1dSRodney W. Grimes /*
69c444cddeSAndre Oppermann  * Structure stored in mbuf in inpcb.ip_options
70c444cddeSAndre Oppermann  * and passed to ip_output when ip options are in use.
71c444cddeSAndre Oppermann  * The actual length of the options (including ipopt_dst)
72c444cddeSAndre Oppermann  * is in m_len.
73c444cddeSAndre Oppermann  */
74c444cddeSAndre Oppermann #define MAX_IPOPTLEN	40
75c444cddeSAndre Oppermann 
76c444cddeSAndre Oppermann struct ipoption {
77c444cddeSAndre Oppermann 	struct	in_addr ipopt_dst;	/* first-hop dst if source routed */
78c444cddeSAndre Oppermann 	char	ipopt_list[MAX_IPOPTLEN];	/* options proper */
79c444cddeSAndre Oppermann };
80c444cddeSAndre Oppermann 
81c444cddeSAndre Oppermann /*
82df8bae1dSRodney W. Grimes  * Structure attached to inpcb.ip_moptions and
83df8bae1dSRodney W. Grimes  * passed to ip_output when IP multicast options are in use.
8471498f30SBruce M Simpson  * This structure is lazy-allocated.
85df8bae1dSRodney W. Grimes  */
86df8bae1dSRodney W. Grimes struct ip_moptions {
87df8bae1dSRodney W. Grimes 	struct	ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
8833841545SHajimu UMEMOTO 	struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
893548bfc9SBruce M Simpson 	u_long	imo_multicast_vif;	/* vif num outgoing multicasts */
90df8bae1dSRodney W. Grimes 	u_char	imo_multicast_ttl;	/* TTL for outgoing multicasts */
91df8bae1dSRodney W. Grimes 	u_char	imo_multicast_loop;	/* 1 => hear sends if a member */
92df8bae1dSRodney W. Grimes 	u_short	imo_num_memberships;	/* no. memberships this socket */
933548bfc9SBruce M Simpson 	u_short	imo_max_memberships;	/* max memberships this socket */
943548bfc9SBruce M Simpson 	struct	in_multi **imo_membership;	/* group memberships */
9571498f30SBruce M Simpson 	struct	in_mfilter *imo_mfilters;	/* source filters */
96df8bae1dSRodney W. Grimes };
97df8bae1dSRodney W. Grimes 
98df8bae1dSRodney W. Grimes struct	ipstat {
99df8bae1dSRodney W. Grimes 	u_long	ips_total;		/* total packets received */
100df8bae1dSRodney W. Grimes 	u_long	ips_badsum;		/* checksum bad */
101df8bae1dSRodney W. Grimes 	u_long	ips_tooshort;		/* packet too short */
102df8bae1dSRodney W. Grimes 	u_long	ips_toosmall;		/* not enough data */
103df8bae1dSRodney W. Grimes 	u_long	ips_badhlen;		/* ip header length < data size */
104df8bae1dSRodney W. Grimes 	u_long	ips_badlen;		/* ip length < ip header length */
105df8bae1dSRodney W. Grimes 	u_long	ips_fragments;		/* fragments received */
106df8bae1dSRodney W. Grimes 	u_long	ips_fragdropped;	/* frags dropped (dups, out of space) */
107df8bae1dSRodney W. Grimes 	u_long	ips_fragtimeout;	/* fragments timed out */
108df8bae1dSRodney W. Grimes 	u_long	ips_forward;		/* packets forwarded */
1091f91d8c5SDavid Greenman 	u_long	ips_fastforward;	/* packets fast forwarded */
110df8bae1dSRodney W. Grimes 	u_long	ips_cantforward;	/* packets rcvd for unreachable dest */
111df8bae1dSRodney W. Grimes 	u_long	ips_redirectsent;	/* packets forwarded on same net */
112df8bae1dSRodney W. Grimes 	u_long	ips_noproto;		/* unknown or unsupported protocol */
113df8bae1dSRodney W. Grimes 	u_long	ips_delivered;		/* datagrams delivered to upper level*/
114df8bae1dSRodney W. Grimes 	u_long	ips_localout;		/* total ip packets generated here */
115df8bae1dSRodney W. Grimes 	u_long	ips_odropped;		/* lost packets due to nobufs, etc. */
116df8bae1dSRodney W. Grimes 	u_long	ips_reassembled;	/* total packets reassembled ok */
1176c5e9bbdSMike Pritchard 	u_long	ips_fragmented;		/* datagrams successfully fragmented */
118df8bae1dSRodney W. Grimes 	u_long	ips_ofragments;		/* output fragments created */
119df8bae1dSRodney W. Grimes 	u_long	ips_cantfrag;		/* don't fragment flag was set, etc. */
120df8bae1dSRodney W. Grimes 	u_long	ips_badoptions;		/* error in option processing */
121df8bae1dSRodney W. Grimes 	u_long	ips_noroute;		/* packets discarded due to no route */
122df8bae1dSRodney W. Grimes 	u_long	ips_badvers;		/* ip version != 4 */
123df8bae1dSRodney W. Grimes 	u_long	ips_rawout;		/* total raw ip packets generated */
124430d30d8SBill Fenner 	u_long	ips_toolong;		/* ip length > max ip packet size */
12582c39223SGarrett Wollman 	u_long	ips_notmember;		/* multicasts for unregistered grps */
12676429de4SYoshinobu Inoue 	u_long	ips_nogif;		/* no match gif found */
12733841545SHajimu UMEMOTO 	u_long	ips_badaddr;		/* invalid address on header */
128df8bae1dSRodney W. Grimes };
129df8bae1dSRodney W. Grimes 
130664a31e4SPeter Wemm #ifdef _KERNEL
1315914e1eaSBruce Evans 
132eddfbb76SRobert Watson #include <net/vnet.h>
133eddfbb76SRobert Watson 
134315e3e38SRobert Watson /*
135315e3e38SRobert Watson  * In-kernel consumers can use these accessor macros directly to update
136315e3e38SRobert Watson  * stats.
137315e3e38SRobert Watson  */
13886425c62SRobert Watson #define	IPSTAT_ADD(name, val)	V_ipstat.name += (val)
13986425c62SRobert Watson #define	IPSTAT_SUB(name, val)	V_ipstat.name -= (val)
14086425c62SRobert Watson #define	IPSTAT_INC(name)	IPSTAT_ADD(name, 1)
14186425c62SRobert Watson #define	IPSTAT_DEC(name)	IPSTAT_SUB(name, 1)
14286425c62SRobert Watson 
143315e3e38SRobert Watson /*
144315e3e38SRobert Watson  * Kernel module consumers must use this accessor macro.
145315e3e38SRobert Watson  */
146315e3e38SRobert Watson void	kmod_ipstat_inc(int statnum);
147315e3e38SRobert Watson #define	KMOD_IPSTAT_INC(name)						\
148315e3e38SRobert Watson 	kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(u_long))
149315e3e38SRobert Watson void	kmod_ipstat_dec(int statnum);
150315e3e38SRobert Watson #define	KMOD_IPSTAT_DEC(name)						\
151315e3e38SRobert Watson 	kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(u_long))
152315e3e38SRobert Watson 
15371498f30SBruce M Simpson /* flags passed to ip_output as last parameter */
15471498f30SBruce M Simpson #define	IP_FORWARDING		0x1		/* most of ip header exists */
15571498f30SBruce M Simpson #define	IP_RAWOUTPUT		0x2		/* raw ip header exists */
15671498f30SBruce M Simpson #define	IP_SENDONES		0x4		/* send all-ones broadcast */
15771498f30SBruce M Simpson #define	IP_SENDTOIF		0x8		/* send on specific ifnet */
158beaa515eSAndre Oppermann #define IP_ROUTETOIF		SO_DONTROUTE	/* 0x10 bypass routing tables */
159beaa515eSAndre Oppermann #define IP_ALLOWBROADCAST	SO_BROADCAST	/* 0x20 can send broadcast packets */
160df8bae1dSRodney W. Grimes 
161beaa515eSAndre Oppermann /*
162beaa515eSAndre Oppermann  * mbuf flag used by ip_fastfwd
163beaa515eSAndre Oppermann  */
164ac9d7e26SMax Laier #define	M_FASTFWD_OURS		M_PROTO1	/* changed dst to local */
165ac9d7e26SMax Laier 
1662fcb030aSAndrew Thompson #ifdef __NO_STRICT_ALIGNMENT
1672fcb030aSAndrew Thompson #define IP_HDR_ALIGNED_P(ip)	1
1682fcb030aSAndrew Thompson #else
1692fcb030aSAndrew Thompson #define IP_HDR_ALIGNED_P(ip)	((((intptr_t) (ip)) & 3) == 0)
1702fcb030aSAndrew Thompson #endif
1712fcb030aSAndrew Thompson 
172cfe8b629SGarrett Wollman struct ip;
173ca5d5e73SBruce Evans struct inpcb;
1745e26bd9aSBruce Evans struct route;
175cfe8b629SGarrett Wollman struct sockopt;
1765e26bd9aSBruce Evans 
177eddfbb76SRobert Watson VNET_DECLARE(struct ipstat, ipstat);
178eddfbb76SRobert Watson VNET_DECLARE(u_short, ip_id);			/* ip packet ctr, for ids */
179eddfbb76SRobert Watson VNET_DECLARE(int, ip_defttl);			/* default IP ttl */
180eddfbb76SRobert Watson VNET_DECLARE(int, ipforwarding);		/* ip forwarding */
181c76ff708SAndre Oppermann #ifdef IPSTEALTH
182eddfbb76SRobert Watson VNET_DECLARE(int, ipstealth);			/* stealth forwarding */
183c76ff708SAndre Oppermann #endif
184*82cea7e6SBjoern A. Zeeb extern u_char	ip_protox[];
185eddfbb76SRobert Watson VNET_DECLARE(struct socket *, ip_rsvpd);	/* reservation protocol daemon*/
186eddfbb76SRobert Watson VNET_DECLARE(struct socket *, ip_mrouter);	/* multicast routing daemon */
187*82cea7e6SBjoern A. Zeeb extern int	(*legal_vif_num)(int);
188*82cea7e6SBjoern A. Zeeb extern u_long	(*ip_mcast_src)(int);
189*82cea7e6SBjoern A. Zeeb VNET_DECLARE(int, rsvp_on);
190*82cea7e6SBjoern A. Zeeb extern struct	pr_usrreqs rip_usrreqs;
191eddfbb76SRobert Watson 
1921e77c105SRobert Watson #define	V_ipstat		VNET(ipstat)
1931e77c105SRobert Watson #define	V_ip_id			VNET(ip_id)
1941e77c105SRobert Watson #define	V_ip_defttl		VNET(ip_defttl)
1951e77c105SRobert Watson #define	V_ipforwarding		VNET(ipforwarding)
196eddfbb76SRobert Watson #ifdef IPSTEALTH
1971e77c105SRobert Watson #define	V_ipstealth		VNET(ipstealth)
198eddfbb76SRobert Watson #endif
1991e77c105SRobert Watson #define	V_ip_rsvpd		VNET(ip_rsvpd)
2001e77c105SRobert Watson #define	V_ip_mrouter		VNET(ip_mrouter)
201*82cea7e6SBjoern A. Zeeb #define	V_rsvp_on		VNET(rsvp_on)
202df8bae1dSRodney W. Grimes 
20371498f30SBruce M Simpson void	inp_freemoptions(struct ip_moptions *);
20471498f30SBruce M Simpson int	inp_getmoptions(struct inpcb *, struct sockopt *);
20571498f30SBruce M Simpson int	inp_setmoptions(struct inpcb *, struct sockopt *);
20671498f30SBruce M Simpson 
2074d77a549SAlfred Perlstein int	ip_ctloutput(struct socket *, struct sockopt *sopt);
2084d77a549SAlfred Perlstein void	ip_drain(void);
2095f311da2SMike Silbersack void	ip_fini(void *xtp);
2101e78ac21SJeffrey Hsu int	ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
2111e78ac21SJeffrey Hsu 	    u_long if_hwassist_flags, int sw_csum);
212ef39adf0SAndre Oppermann void	ip_forward(struct mbuf *m, int srcrt);
2134d77a549SAlfred Perlstein void	ip_init(void);
2149802380eSBjoern A. Zeeb #ifdef VIMAGE
2159802380eSBjoern A. Zeeb void	ip_destroy(void);
2169802380eSBjoern A. Zeeb #endif
217beaa515eSAndre Oppermann extern int
218beaa515eSAndre Oppermann 	(*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
2194d77a549SAlfred Perlstein 	    struct ip_moptions *);
2204d77a549SAlfred Perlstein int	ip_output(struct mbuf *,
2215d846453SSam Leffler 	    struct mbuf *, struct route *, int, struct ip_moptions *,
2225d846453SSam Leffler 	    struct inpcb *);
223de38924dSAndre Oppermann int	ipproto_register(u_char);
224de38924dSAndre Oppermann int	ipproto_unregister(u_char);
2259b932e9eSAndre Oppermann struct mbuf *
2269b932e9eSAndre Oppermann 	ip_reass(struct mbuf *);
227bd714208SRuslan Ermilov struct in_ifaddr *
2288b07e49aSJulian Elischer 	ip_rtaddr(struct in_addr, u_int fibnum);
2294d77a549SAlfred Perlstein void	ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
2304d77a549SAlfred Perlstein 	    struct mbuf *);
2314d77a549SAlfred Perlstein void	ip_slowtimo(void);
2321f44b0a1SDavid Malone u_int16_t	ip_randomid(void);
2334d77a549SAlfred Perlstein int	rip_ctloutput(struct socket *, struct sockopt *);
2344d77a549SAlfred Perlstein void	rip_ctlinput(int, struct sockaddr *, void *);
2354d77a549SAlfred Perlstein void	rip_init(void);
236bc29160dSMarko Zec #ifdef VIMAGE
237bc29160dSMarko Zec void	rip_destroy(void);
238bc29160dSMarko Zec #endif
2394d77a549SAlfred Perlstein void	rip_input(struct mbuf *, int);
2404d77a549SAlfred Perlstein int	rip_output(struct mbuf *, struct socket *, u_long);
2414d77a549SAlfred Perlstein void	ipip_input(struct mbuf *, int);
2424d77a549SAlfred Perlstein void	rsvp_input(struct mbuf *, int);
2434d77a549SAlfred Perlstein int	ip_rsvp_init(struct socket *);
2444d77a549SAlfred Perlstein int	ip_rsvp_done(void);
245bbb4330bSLuigi Rizzo extern int	(*ip_rsvp_vif)(struct socket *, struct sockopt *);
246bbb4330bSLuigi Rizzo extern void	(*ip_rsvp_force_done)(struct socket *);
247bbb4330bSLuigi Rizzo extern void	(*rsvp_input_p)(struct mbuf *m, int off);
248bbb4330bSLuigi Rizzo 
2490b4b0b0fSJulian Elischer VNET_DECLARE(struct pfil_head, inet_pfil_hook);	/* packet filter hooks */
2500b4b0b0fSJulian Elischer #define	V_inet_pfil_hook	VNET(inet_pfil_hook)
251134ea224SSam Leffler 
2521c238475SJonathan Lemon void	in_delayed_cksum(struct mbuf *m);
2531c238475SJonathan Lemon 
254b2019e17SLuigi Rizzo /* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */
255b2019e17SLuigi Rizzo /*
256b2019e17SLuigi Rizzo  * Reference to an ipfw or packet filter rule that can be carried
257b2019e17SLuigi Rizzo  * outside critical sections.
258b2019e17SLuigi Rizzo  * A rule is identified by rulenum:rule_id which is ordered.
259b2019e17SLuigi Rizzo  * In version chain_id the rule can be found in slot 'slot', so
260b2019e17SLuigi Rizzo  * we don't need a lookup if chain_id == chain->id.
261b2019e17SLuigi Rizzo  *
262b2019e17SLuigi Rizzo  * On exit from the firewall this structure refers to the rule after
263b2019e17SLuigi Rizzo  * the matching one (slot points to the new rule; rulenum:rule_id-1
264b2019e17SLuigi Rizzo  * is the matching rule), and additional info (e.g. info often contains
265b2019e17SLuigi Rizzo  * the insn argument or tablearg in the low 16 bits, in host format).
266b2019e17SLuigi Rizzo  * On entry, the structure is valid if slot>0, and refers to the starting
267b2019e17SLuigi Rizzo  * rules. 'info' contains the reason for reinject, e.g. divert port,
268b2019e17SLuigi Rizzo  * divert direction, and so on.
269b2019e17SLuigi Rizzo  */
270b2019e17SLuigi Rizzo struct ipfw_rule_ref {
271b2019e17SLuigi Rizzo 	uint32_t	slot;		/* slot for matching rule	*/
272b2019e17SLuigi Rizzo 	uint32_t	rulenum;	/* matching rule number		*/
273b2019e17SLuigi Rizzo 	uint32_t	rule_id;	/* matching rule id		*/
274b2019e17SLuigi Rizzo 	uint32_t	chain_id;	/* ruleset id			*/
275b2019e17SLuigi Rizzo 	uint32_t	info;		/* see below			*/
276b2019e17SLuigi Rizzo };
277b2019e17SLuigi Rizzo 
278b2019e17SLuigi Rizzo enum {
279b2019e17SLuigi Rizzo 	IPFW_INFO_MASK	= 0x0000ffff,
280b2019e17SLuigi Rizzo 	IPFW_INFO_OUT	= 0x00000000,	/* outgoing, just for convenience */
281b2019e17SLuigi Rizzo 	IPFW_INFO_IN	= 0x80000000,	/* incoming, overloads dir */
282b2019e17SLuigi Rizzo 	IPFW_ONEPASS	= 0x40000000,	/* One-pass, do not reinject */
283b2019e17SLuigi Rizzo 	IPFW_IS_MASK	= 0x30000000,	/* which source ? */
284b2019e17SLuigi Rizzo 	IPFW_IS_DIVERT	= 0x20000000,
285b2019e17SLuigi Rizzo 	IPFW_IS_DUMMYNET =0x10000000,
286b2019e17SLuigi Rizzo 	IPFW_IS_PIPE	= 0x08000000,	/* pip1=1, queue = 0 */
287b2019e17SLuigi Rizzo };
288b2019e17SLuigi Rizzo #define MTAG_IPFW	1148380143	/* IPFW-tagged cookie */
289b2019e17SLuigi Rizzo #define MTAG_IPFW_RULE	1262273568	/* rule reference */
290b2019e17SLuigi Rizzo 
291115a40c7SLuigi Rizzo struct ip_fw_args;
2920b4b0b0fSJulian Elischer typedef int	(*ip_fw_chk_ptr_t)(struct ip_fw_args *args);
2930b4b0b0fSJulian Elischer typedef int	(*ip_fw_ctl_ptr_t)(struct sockopt *);
2940b4b0b0fSJulian Elischer VNET_DECLARE(ip_fw_chk_ptr_t, ip_fw_chk_ptr);
2950b4b0b0fSJulian Elischer VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr);
2960b4b0b0fSJulian Elischer #define	V_ip_fw_chk_ptr		VNET(ip_fw_chk_ptr)
2970b4b0b0fSJulian Elischer #define	V_ip_fw_ctl_ptr		VNET(ip_fw_ctl_ptr)
2980b4b0b0fSJulian Elischer 
299b2019e17SLuigi Rizzo /* Divert hooks. */
300b2019e17SLuigi Rizzo extern void	(*ip_divert_ptr)(struct mbuf *m, int incoming);
301b2019e17SLuigi Rizzo /* ng_ipfw hooks -- XXX make it the same as divert and dummynet */
302b2019e17SLuigi Rizzo extern int	(*ng_ipfw_input_p)(struct mbuf **, int,
303b2019e17SLuigi Rizzo 			struct ip_fw_args *, int);
304b2019e17SLuigi Rizzo 
305115a40c7SLuigi Rizzo extern int	(*ip_dn_ctl_ptr)(struct sockopt *);
306b2019e17SLuigi Rizzo extern int	(*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *);
307eddfbb76SRobert Watson 
308eddfbb76SRobert Watson VNET_DECLARE(int, ip_do_randomid);
3091e77c105SRobert Watson #define	V_ip_do_randomid	VNET(ip_do_randomid)
310eddfbb76SRobert Watson #define	ip_newid()	((V_ip_do_randomid != 0) ? ip_randomid() : \
311eddfbb76SRobert Watson 			    htons(V_ip_id++))
312eddfbb76SRobert Watson 
313664a31e4SPeter Wemm #endif /* _KERNEL */
314707f139eSPaul Richards 
3155914e1eaSBruce Evans #endif /* !_NETINET_IP_VAR_H_ */
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