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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
30 * $FreeBSD: head/sys/netinet/ip_var.h 207369 2010-04-29 11:52:42Z bz $
31 */
32
33#ifndef _NETINET_IP_VAR_H_
34#define _NETINET_IP_VAR_H_
35
36#include <sys/queue.h>
37
38/*
39 * Overlay for ip header used by other protocols (tcp, udp).
40 */
41struct ipovly {
42 u_char ih_x1[9]; /* (unused) */
43 u_char ih_pr; /* protocol */
44 u_short ih_len; /* protocol length */
45 struct in_addr ih_src; /* source internet address */
46 struct in_addr ih_dst; /* destination internet address */
47};
48
49#ifdef _KERNEL
50/*
51 * Ip reassembly queue structure. Each fragment
52 * being reassembled is attached to one of these structures.
53 * They are timed out after ipq_ttl drops to 0, and may also
54 * be reclaimed if memory becomes tight.
55 */
56struct ipq {
57 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
58 u_char ipq_ttl; /* time for reass q to live */
59 u_char ipq_p; /* protocol of this fragment */
60 u_short ipq_id; /* sequence id for reassembly */
61 struct mbuf *ipq_frags; /* to ip headers of fragments */
62 struct in_addr ipq_src,ipq_dst;
63 u_char ipq_nfrags; /* # frags in this packet */
64 struct label *ipq_label; /* MAC label */
65};
66#endif /* _KERNEL */
67
68/*
69 * Structure stored in mbuf in inpcb.ip_options
70 * and passed to ip_output when ip options are in use.
71 * The actual length of the options (including ipopt_dst)
72 * is in m_len.
73 */
74#define MAX_IPOPTLEN 40
75
76struct ipoption {
77 struct in_addr ipopt_dst; /* first-hop dst if source routed */
78 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
79};
80
81/*
82 * Structure attached to inpcb.ip_moptions and
83 * passed to ip_output when IP multicast options are in use.
84 * This structure is lazy-allocated.
85 */
86struct ip_moptions {
87 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
88 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
89 u_long imo_multicast_vif; /* vif num outgoing multicasts */
90 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
91 u_char imo_multicast_loop; /* 1 => hear sends if a member */
92 u_short imo_num_memberships; /* no. memberships this socket */
93 u_short imo_max_memberships; /* max memberships this socket */
94 struct in_multi **imo_membership; /* group memberships */
95 struct in_mfilter *imo_mfilters; /* source filters */
96};
97
98struct ipstat {
99 u_long ips_total; /* total packets received */
100 u_long ips_badsum; /* checksum bad */
101 u_long ips_tooshort; /* packet too short */
102 u_long ips_toosmall; /* not enough data */
103 u_long ips_badhlen; /* ip header length < data size */
104 u_long ips_badlen; /* ip length < ip header length */
105 u_long ips_fragments; /* fragments received */
106 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
107 u_long ips_fragtimeout; /* fragments timed out */
108 u_long ips_forward; /* packets forwarded */
109 u_long ips_fastforward; /* packets fast forwarded */
110 u_long ips_cantforward; /* packets rcvd for unreachable dest */
111 u_long ips_redirectsent; /* packets forwarded on same net */
112 u_long ips_noproto; /* unknown or unsupported protocol */
113 u_long ips_delivered; /* datagrams delivered to upper level*/
114 u_long ips_localout; /* total ip packets generated here */
115 u_long ips_odropped; /* lost packets due to nobufs, etc. */
116 u_long ips_reassembled; /* total packets reassembled ok */
117 u_long ips_fragmented; /* datagrams successfully fragmented */
118 u_long ips_ofragments; /* output fragments created */
119 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
120 u_long ips_badoptions; /* error in option processing */
121 u_long ips_noroute; /* packets discarded due to no route */
122 u_long ips_badvers; /* ip version != 4 */
123 u_long ips_rawout; /* total raw ip packets generated */
124 u_long ips_toolong; /* ip length > max ip packet size */
125 u_long ips_notmember; /* multicasts for unregistered grps */
126 u_long ips_nogif; /* no match gif found */
127 u_long ips_badaddr; /* invalid address on header */
128};
129
130#ifdef _KERNEL
131
132#include <net/vnet.h>
133
134/*
135 * In-kernel consumers can use these accessor macros directly to update
136 * stats.
137 */
138#define IPSTAT_ADD(name, val) V_ipstat.name += (val)
139#define IPSTAT_SUB(name, val) V_ipstat.name -= (val)
140#define IPSTAT_INC(name) IPSTAT_ADD(name, 1)
141#define IPSTAT_DEC(name) IPSTAT_SUB(name, 1)
142
143/*
144 * Kernel module consumers must use this accessor macro.
145 */
146void kmod_ipstat_inc(int statnum);
147#define KMOD_IPSTAT_INC(name) \
148 kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(u_long))
149void kmod_ipstat_dec(int statnum);
150#define KMOD_IPSTAT_DEC(name) \
151 kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(u_long))
152
153/* flags passed to ip_output as last parameter */
154#define IP_FORWARDING 0x1 /* most of ip header exists */
155#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
156#define IP_SENDONES 0x4 /* send all-ones broadcast */
157#define IP_SENDTOIF 0x8 /* send on specific ifnet */
158#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
159#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
160
161/*
162 * mbuf flag used by ip_fastfwd
163 */
164#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
165
166#ifdef __NO_STRICT_ALIGNMENT
167#define IP_HDR_ALIGNED_P(ip) 1
168#else
169#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
170#endif
171
172struct ip;
173struct inpcb;
174struct route;
175struct sockopt;
176
177VNET_DECLARE(struct ipstat, ipstat);
178VNET_DECLARE(u_short, ip_id); /* ip packet ctr, for ids */
179VNET_DECLARE(int, ip_defttl); /* default IP ttl */
180VNET_DECLARE(int, ipforwarding); /* ip forwarding */
181#ifdef IPSTEALTH
182VNET_DECLARE(int, ipstealth); /* stealth forwarding */
183#endif
184extern u_char ip_protox[];
185VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/
186VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */
187extern int (*legal_vif_num)(int);
188extern u_long (*ip_mcast_src)(int);
189VNET_DECLARE(int, rsvp_on);
190extern struct pr_usrreqs rip_usrreqs;
191
192#define V_ipstat VNET(ipstat)
193#define V_ip_id VNET(ip_id)
194#define V_ip_defttl VNET(ip_defttl)
195#define V_ipforwarding VNET(ipforwarding)
196#ifdef IPSTEALTH
197#define V_ipstealth VNET(ipstealth)
198#endif
199#define V_ip_rsvpd VNET(ip_rsvpd)
200#define V_ip_mrouter VNET(ip_mrouter)
201#define V_rsvp_on VNET(rsvp_on)
202
203void inp_freemoptions(struct ip_moptions *);
204int inp_getmoptions(struct inpcb *, struct sockopt *);
205int inp_setmoptions(struct inpcb *, struct sockopt *);
206
207int ip_ctloutput(struct socket *, struct sockopt *sopt);
208void ip_drain(void);
209void ip_fini(void *xtp);
210int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
211 u_long if_hwassist_flags, int sw_csum);
212void ip_forward(struct mbuf *m, int srcrt);
213void ip_init(void);
214#ifdef VIMAGE
215void ip_destroy(void);
216#endif
217extern int
218 (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
219 struct ip_moptions *);
220int ip_output(struct mbuf *,
221 struct mbuf *, struct route *, int, struct ip_moptions *,
222 struct inpcb *);
223int ipproto_register(u_char);
224int ipproto_unregister(u_char);
225struct mbuf *
226 ip_reass(struct mbuf *);
227struct in_ifaddr *
228 ip_rtaddr(struct in_addr, u_int fibnum);
229void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
230 struct mbuf *);
231void ip_slowtimo(void);
232u_int16_t ip_randomid(void);
233int rip_ctloutput(struct socket *, struct sockopt *);
234void rip_ctlinput(int, struct sockaddr *, void *);
235void rip_init(void);
236#ifdef VIMAGE
237void rip_destroy(void);
238#endif
239void rip_input(struct mbuf *, int);
240int rip_output(struct mbuf *, struct socket *, u_long);
241void ipip_input(struct mbuf *, int);
242void rsvp_input(struct mbuf *, int);
243int ip_rsvp_init(struct socket *);
244int ip_rsvp_done(void);
245extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
246extern void (*ip_rsvp_force_done)(struct socket *);
247extern void (*rsvp_input_p)(struct mbuf *m, int off);
248
249VNET_DECLARE(struct pfil_head, inet_pfil_hook); /* packet filter hooks */
250#define V_inet_pfil_hook VNET(inet_pfil_hook)
251
252void in_delayed_cksum(struct mbuf *m);
253
254/* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */
255/*
256 * Reference to an ipfw or packet filter rule that can be carried
257 * outside critical sections.
258 * A rule is identified by rulenum:rule_id which is ordered.
259 * In version chain_id the rule can be found in slot 'slot', so
260 * we don't need a lookup if chain_id == chain->id.
261 *
262 * On exit from the firewall this structure refers to the rule after
263 * the matching one (slot points to the new rule; rulenum:rule_id-1
264 * is the matching rule), and additional info (e.g. info often contains
265 * the insn argument or tablearg in the low 16 bits, in host format).
266 * On entry, the structure is valid if slot>0, and refers to the starting
267 * rules. 'info' contains the reason for reinject, e.g. divert port,
268 * divert direction, and so on.
269 */
270struct ipfw_rule_ref {
271 uint32_t slot; /* slot for matching rule */
272 uint32_t rulenum; /* matching rule number */
273 uint32_t rule_id; /* matching rule id */
274 uint32_t chain_id; /* ruleset id */
275 uint32_t info; /* see below */
276};
277
278enum {
279 IPFW_INFO_MASK = 0x0000ffff,
280 IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */
281 IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */
282 IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */
283 IPFW_IS_MASK = 0x30000000, /* which source ? */
284 IPFW_IS_DIVERT = 0x20000000,
285 IPFW_IS_DUMMYNET =0x10000000,
286 IPFW_IS_PIPE = 0x08000000, /* pip1=1, queue = 0 */
287};
288#define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */
289#define MTAG_IPFW_RULE 1262273568 /* rule reference */
290
291struct ip_fw_args;
292typedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args);
293typedef int (*ip_fw_ctl_ptr_t)(struct sockopt *);
294VNET_DECLARE(ip_fw_chk_ptr_t, ip_fw_chk_ptr);
295VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr);
296#define V_ip_fw_chk_ptr VNET(ip_fw_chk_ptr)
297#define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr)
298
299/* Divert hooks. */
300extern void (*ip_divert_ptr)(struct mbuf *m, int incoming);
301/* ng_ipfw hooks -- XXX make it the same as divert and dummynet */
302extern int (*ng_ipfw_input_p)(struct mbuf **, int,
303 struct ip_fw_args *, int);
304
305extern int (*ip_dn_ctl_ptr)(struct sockopt *);
306extern int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *);
307
308VNET_DECLARE(int, ip_do_randomid);
309#define V_ip_do_randomid VNET(ip_do_randomid)
310#define ip_newid() ((V_ip_do_randomid != 0) ? ip_randomid() : \
311 htons(V_ip_id++))
312
313#endif /* _KERNEL */
314
315#endif /* !_NETINET_IP_VAR_H_ */
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
30 * $FreeBSD: head/sys/netinet/ip_var.h 207369 2010-04-29 11:52:42Z bz $
31 */
32
33#ifndef _NETINET_IP_VAR_H_
34#define _NETINET_IP_VAR_H_
35
36#include <sys/queue.h>
37
38/*
39 * Overlay for ip header used by other protocols (tcp, udp).
40 */
41struct ipovly {
42 u_char ih_x1[9]; /* (unused) */
43 u_char ih_pr; /* protocol */
44 u_short ih_len; /* protocol length */
45 struct in_addr ih_src; /* source internet address */
46 struct in_addr ih_dst; /* destination internet address */
47};
48
49#ifdef _KERNEL
50/*
51 * Ip reassembly queue structure. Each fragment
52 * being reassembled is attached to one of these structures.
53 * They are timed out after ipq_ttl drops to 0, and may also
54 * be reclaimed if memory becomes tight.
55 */
56struct ipq {
57 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
58 u_char ipq_ttl; /* time for reass q to live */
59 u_char ipq_p; /* protocol of this fragment */
60 u_short ipq_id; /* sequence id for reassembly */
61 struct mbuf *ipq_frags; /* to ip headers of fragments */
62 struct in_addr ipq_src,ipq_dst;
63 u_char ipq_nfrags; /* # frags in this packet */
64 struct label *ipq_label; /* MAC label */
65};
66#endif /* _KERNEL */
67
68/*
69 * Structure stored in mbuf in inpcb.ip_options
70 * and passed to ip_output when ip options are in use.
71 * The actual length of the options (including ipopt_dst)
72 * is in m_len.
73 */
74#define MAX_IPOPTLEN 40
75
76struct ipoption {
77 struct in_addr ipopt_dst; /* first-hop dst if source routed */
78 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
79};
80
81/*
82 * Structure attached to inpcb.ip_moptions and
83 * passed to ip_output when IP multicast options are in use.
84 * This structure is lazy-allocated.
85 */
86struct ip_moptions {
87 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
88 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
89 u_long imo_multicast_vif; /* vif num outgoing multicasts */
90 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
91 u_char imo_multicast_loop; /* 1 => hear sends if a member */
92 u_short imo_num_memberships; /* no. memberships this socket */
93 u_short imo_max_memberships; /* max memberships this socket */
94 struct in_multi **imo_membership; /* group memberships */
95 struct in_mfilter *imo_mfilters; /* source filters */
96};
97
98struct ipstat {
99 u_long ips_total; /* total packets received */
100 u_long ips_badsum; /* checksum bad */
101 u_long ips_tooshort; /* packet too short */
102 u_long ips_toosmall; /* not enough data */
103 u_long ips_badhlen; /* ip header length < data size */
104 u_long ips_badlen; /* ip length < ip header length */
105 u_long ips_fragments; /* fragments received */
106 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
107 u_long ips_fragtimeout; /* fragments timed out */
108 u_long ips_forward; /* packets forwarded */
109 u_long ips_fastforward; /* packets fast forwarded */
110 u_long ips_cantforward; /* packets rcvd for unreachable dest */
111 u_long ips_redirectsent; /* packets forwarded on same net */
112 u_long ips_noproto; /* unknown or unsupported protocol */
113 u_long ips_delivered; /* datagrams delivered to upper level*/
114 u_long ips_localout; /* total ip packets generated here */
115 u_long ips_odropped; /* lost packets due to nobufs, etc. */
116 u_long ips_reassembled; /* total packets reassembled ok */
117 u_long ips_fragmented; /* datagrams successfully fragmented */
118 u_long ips_ofragments; /* output fragments created */
119 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
120 u_long ips_badoptions; /* error in option processing */
121 u_long ips_noroute; /* packets discarded due to no route */
122 u_long ips_badvers; /* ip version != 4 */
123 u_long ips_rawout; /* total raw ip packets generated */
124 u_long ips_toolong; /* ip length > max ip packet size */
125 u_long ips_notmember; /* multicasts for unregistered grps */
126 u_long ips_nogif; /* no match gif found */
127 u_long ips_badaddr; /* invalid address on header */
128};
129
130#ifdef _KERNEL
131
132#include <net/vnet.h>
133
134/*
135 * In-kernel consumers can use these accessor macros directly to update
136 * stats.
137 */
138#define IPSTAT_ADD(name, val) V_ipstat.name += (val)
139#define IPSTAT_SUB(name, val) V_ipstat.name -= (val)
140#define IPSTAT_INC(name) IPSTAT_ADD(name, 1)
141#define IPSTAT_DEC(name) IPSTAT_SUB(name, 1)
142
143/*
144 * Kernel module consumers must use this accessor macro.
145 */
146void kmod_ipstat_inc(int statnum);
147#define KMOD_IPSTAT_INC(name) \
148 kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(u_long))
149void kmod_ipstat_dec(int statnum);
150#define KMOD_IPSTAT_DEC(name) \
151 kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(u_long))
152
153/* flags passed to ip_output as last parameter */
154#define IP_FORWARDING 0x1 /* most of ip header exists */
155#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
156#define IP_SENDONES 0x4 /* send all-ones broadcast */
157#define IP_SENDTOIF 0x8 /* send on specific ifnet */
158#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
159#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
160
161/*
162 * mbuf flag used by ip_fastfwd
163 */
164#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
165
166#ifdef __NO_STRICT_ALIGNMENT
167#define IP_HDR_ALIGNED_P(ip) 1
168#else
169#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
170#endif
171
172struct ip;
173struct inpcb;
174struct route;
175struct sockopt;
176
177VNET_DECLARE(struct ipstat, ipstat);
178VNET_DECLARE(u_short, ip_id); /* ip packet ctr, for ids */
179VNET_DECLARE(int, ip_defttl); /* default IP ttl */
180VNET_DECLARE(int, ipforwarding); /* ip forwarding */
181#ifdef IPSTEALTH
182VNET_DECLARE(int, ipstealth); /* stealth forwarding */
183#endif
184extern u_char ip_protox[];
185VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/
186VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */
187extern int (*legal_vif_num)(int);
188extern u_long (*ip_mcast_src)(int);
189VNET_DECLARE(int, rsvp_on);
190extern struct pr_usrreqs rip_usrreqs;
191
192#define V_ipstat VNET(ipstat)
193#define V_ip_id VNET(ip_id)
194#define V_ip_defttl VNET(ip_defttl)
195#define V_ipforwarding VNET(ipforwarding)
196#ifdef IPSTEALTH
197#define V_ipstealth VNET(ipstealth)
198#endif
199#define V_ip_rsvpd VNET(ip_rsvpd)
200#define V_ip_mrouter VNET(ip_mrouter)
201#define V_rsvp_on VNET(rsvp_on)
202
203void inp_freemoptions(struct ip_moptions *);
204int inp_getmoptions(struct inpcb *, struct sockopt *);
205int inp_setmoptions(struct inpcb *, struct sockopt *);
206
207int ip_ctloutput(struct socket *, struct sockopt *sopt);
208void ip_drain(void);
209void ip_fini(void *xtp);
210int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
211 u_long if_hwassist_flags, int sw_csum);
212void ip_forward(struct mbuf *m, int srcrt);
213void ip_init(void);
214#ifdef VIMAGE
215void ip_destroy(void);
216#endif
217extern int
218 (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
219 struct ip_moptions *);
220int ip_output(struct mbuf *,
221 struct mbuf *, struct route *, int, struct ip_moptions *,
222 struct inpcb *);
223int ipproto_register(u_char);
224int ipproto_unregister(u_char);
225struct mbuf *
226 ip_reass(struct mbuf *);
227struct in_ifaddr *
228 ip_rtaddr(struct in_addr, u_int fibnum);
229void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
230 struct mbuf *);
231void ip_slowtimo(void);
232u_int16_t ip_randomid(void);
233int rip_ctloutput(struct socket *, struct sockopt *);
234void rip_ctlinput(int, struct sockaddr *, void *);
235void rip_init(void);
236#ifdef VIMAGE
237void rip_destroy(void);
238#endif
239void rip_input(struct mbuf *, int);
240int rip_output(struct mbuf *, struct socket *, u_long);
241void ipip_input(struct mbuf *, int);
242void rsvp_input(struct mbuf *, int);
243int ip_rsvp_init(struct socket *);
244int ip_rsvp_done(void);
245extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
246extern void (*ip_rsvp_force_done)(struct socket *);
247extern void (*rsvp_input_p)(struct mbuf *m, int off);
248
249VNET_DECLARE(struct pfil_head, inet_pfil_hook); /* packet filter hooks */
250#define V_inet_pfil_hook VNET(inet_pfil_hook)
251
252void in_delayed_cksum(struct mbuf *m);
253
254/* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */
255/*
256 * Reference to an ipfw or packet filter rule that can be carried
257 * outside critical sections.
258 * A rule is identified by rulenum:rule_id which is ordered.
259 * In version chain_id the rule can be found in slot 'slot', so
260 * we don't need a lookup if chain_id == chain->id.
261 *
262 * On exit from the firewall this structure refers to the rule after
263 * the matching one (slot points to the new rule; rulenum:rule_id-1
264 * is the matching rule), and additional info (e.g. info often contains
265 * the insn argument or tablearg in the low 16 bits, in host format).
266 * On entry, the structure is valid if slot>0, and refers to the starting
267 * rules. 'info' contains the reason for reinject, e.g. divert port,
268 * divert direction, and so on.
269 */
270struct ipfw_rule_ref {
271 uint32_t slot; /* slot for matching rule */
272 uint32_t rulenum; /* matching rule number */
273 uint32_t rule_id; /* matching rule id */
274 uint32_t chain_id; /* ruleset id */
275 uint32_t info; /* see below */
276};
277
278enum {
279 IPFW_INFO_MASK = 0x0000ffff,
280 IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */
281 IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */
282 IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */
283 IPFW_IS_MASK = 0x30000000, /* which source ? */
284 IPFW_IS_DIVERT = 0x20000000,
285 IPFW_IS_DUMMYNET =0x10000000,
286 IPFW_IS_PIPE = 0x08000000, /* pip1=1, queue = 0 */
287};
288#define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */
289#define MTAG_IPFW_RULE 1262273568 /* rule reference */
290
291struct ip_fw_args;
292typedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args);
293typedef int (*ip_fw_ctl_ptr_t)(struct sockopt *);
294VNET_DECLARE(ip_fw_chk_ptr_t, ip_fw_chk_ptr);
295VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr);
296#define V_ip_fw_chk_ptr VNET(ip_fw_chk_ptr)
297#define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr)
298
299/* Divert hooks. */
300extern void (*ip_divert_ptr)(struct mbuf *m, int incoming);
301/* ng_ipfw hooks -- XXX make it the same as divert and dummynet */
302extern int (*ng_ipfw_input_p)(struct mbuf **, int,
303 struct ip_fw_args *, int);
304
305extern int (*ip_dn_ctl_ptr)(struct sockopt *);
306extern int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *);
307
308VNET_DECLARE(int, ip_do_randomid);
309#define V_ip_do_randomid VNET(ip_do_randomid)
310#define ip_newid() ((V_ip_do_randomid != 0) ? ip_randomid() : \
311 htons(V_ip_id++))
312
313#endif /* _KERNEL */
314
315#endif /* !_NETINET_IP_VAR_H_ */