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
| 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 185419 2008-11-28 23:30:51Z zec $
| 30 * $FreeBSD: head/sys/netinet/ip_var.h 185895 2008-12-10 23:12:39Z zec $
|
31 */
32
33#ifndef _NETINET_IP_VAR_H_
34#define _NETINET_IP_VAR_H_
35
36#include <sys/queue.h>
37#ifdef _KERNEL
38#include <sys/vimage.h>
39#endif
40
41/*
42 * Overlay for ip header used by other protocols (tcp, udp).
43 */
44struct ipovly {
45 u_char ih_x1[9]; /* (unused) */
46 u_char ih_pr; /* protocol */
47 u_short ih_len; /* protocol length */
48 struct in_addr ih_src; /* source internet address */
49 struct in_addr ih_dst; /* destination internet address */
50};
51
52#ifdef _KERNEL
53/*
54 * Ip reassembly queue structure. Each fragment
55 * being reassembled is attached to one of these structures.
56 * They are timed out after ipq_ttl drops to 0, and may also
57 * be reclaimed if memory becomes tight.
58 */
59struct ipq {
60 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
61 u_char ipq_ttl; /* time for reass q to live */
62 u_char ipq_p; /* protocol of this fragment */
63 u_short ipq_id; /* sequence id for reassembly */
64 struct mbuf *ipq_frags; /* to ip headers of fragments */
65 struct in_addr ipq_src,ipq_dst;
66 u_char ipq_nfrags; /* # frags in this packet */
67 struct label *ipq_label; /* MAC label */
68};
69#endif /* _KERNEL */
70
71/*
72 * Structure stored in mbuf in inpcb.ip_options
73 * and passed to ip_output when ip options are in use.
74 * The actual length of the options (including ipopt_dst)
75 * is in m_len.
76 */
77#define MAX_IPOPTLEN 40
78
79struct ipoption {
80 struct in_addr ipopt_dst; /* first-hop dst if source routed */
81 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
82};
83
84/*
85 * Multicast source list entry.
86 */
87struct in_msource {
88 TAILQ_ENTRY(in_msource) ims_next; /* next source */
89 struct sockaddr_storage ims_addr; /* address of this source */
90};
91
92/*
93 * Multicast filter descriptor; there is one instance per group membership
94 * on a socket, allocated as an expandable vector hung off ip_moptions.
95 * struct in_multi contains separate IPv4-stack-wide state for IGMPv3.
96 */
97struct in_mfilter {
98 uint16_t imf_fmode; /* filter mode for this socket/group */
99 uint16_t imf_nsources; /* # of sources for this socket/group */
100 TAILQ_HEAD(, in_msource) imf_sources; /* source list */
101};
102
103/*
104 * Structure attached to inpcb.ip_moptions and
105 * passed to ip_output when IP multicast options are in use.
106 * This structure is lazy-allocated.
107 */
108struct ip_moptions {
109 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
110 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
111 u_long imo_multicast_vif; /* vif num outgoing multicasts */
112 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
113 u_char imo_multicast_loop; /* 1 => hear sends if a member */
114 u_short imo_num_memberships; /* no. memberships this socket */
115 u_short imo_max_memberships; /* max memberships this socket */
116 struct in_multi **imo_membership; /* group memberships */
117 struct in_mfilter *imo_mfilters; /* source filters */
118};
119
120struct ipstat {
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
154/* flags passed to ip_output as last parameter */
155#define IP_FORWARDING 0x1 /* most of ip header exists */
156#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
157#define IP_SENDONES 0x4 /* send all-ones broadcast */
158#define IP_SENDTOIF 0x8 /* send on specific ifnet */
159#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
160#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
161
162/*
163 * mbuf flag used by ip_fastfwd
164 */
165#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
166
167#ifdef __NO_STRICT_ALIGNMENT
168#define IP_HDR_ALIGNED_P(ip) 1
169#else
170#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
171#endif
172
173struct ip;
174struct inpcb;
175struct route;
176struct sockopt;
177
178extern struct ipstat ipstat;
179extern u_short ip_id; /* ip packet ctr, for ids */
| 31 */
32
33#ifndef _NETINET_IP_VAR_H_
34#define _NETINET_IP_VAR_H_
35
36#include <sys/queue.h>
37#ifdef _KERNEL
38#include <sys/vimage.h>
39#endif
40
41/*
42 * Overlay for ip header used by other protocols (tcp, udp).
43 */
44struct ipovly {
45 u_char ih_x1[9]; /* (unused) */
46 u_char ih_pr; /* protocol */
47 u_short ih_len; /* protocol length */
48 struct in_addr ih_src; /* source internet address */
49 struct in_addr ih_dst; /* destination internet address */
50};
51
52#ifdef _KERNEL
53/*
54 * Ip reassembly queue structure. Each fragment
55 * being reassembled is attached to one of these structures.
56 * They are timed out after ipq_ttl drops to 0, and may also
57 * be reclaimed if memory becomes tight.
58 */
59struct ipq {
60 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
61 u_char ipq_ttl; /* time for reass q to live */
62 u_char ipq_p; /* protocol of this fragment */
63 u_short ipq_id; /* sequence id for reassembly */
64 struct mbuf *ipq_frags; /* to ip headers of fragments */
65 struct in_addr ipq_src,ipq_dst;
66 u_char ipq_nfrags; /* # frags in this packet */
67 struct label *ipq_label; /* MAC label */
68};
69#endif /* _KERNEL */
70
71/*
72 * Structure stored in mbuf in inpcb.ip_options
73 * and passed to ip_output when ip options are in use.
74 * The actual length of the options (including ipopt_dst)
75 * is in m_len.
76 */
77#define MAX_IPOPTLEN 40
78
79struct ipoption {
80 struct in_addr ipopt_dst; /* first-hop dst if source routed */
81 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
82};
83
84/*
85 * Multicast source list entry.
86 */
87struct in_msource {
88 TAILQ_ENTRY(in_msource) ims_next; /* next source */
89 struct sockaddr_storage ims_addr; /* address of this source */
90};
91
92/*
93 * Multicast filter descriptor; there is one instance per group membership
94 * on a socket, allocated as an expandable vector hung off ip_moptions.
95 * struct in_multi contains separate IPv4-stack-wide state for IGMPv3.
96 */
97struct in_mfilter {
98 uint16_t imf_fmode; /* filter mode for this socket/group */
99 uint16_t imf_nsources; /* # of sources for this socket/group */
100 TAILQ_HEAD(, in_msource) imf_sources; /* source list */
101};
102
103/*
104 * Structure attached to inpcb.ip_moptions and
105 * passed to ip_output when IP multicast options are in use.
106 * This structure is lazy-allocated.
107 */
108struct ip_moptions {
109 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
110 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
111 u_long imo_multicast_vif; /* vif num outgoing multicasts */
112 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
113 u_char imo_multicast_loop; /* 1 => hear sends if a member */
114 u_short imo_num_memberships; /* no. memberships this socket */
115 u_short imo_max_memberships; /* max memberships this socket */
116 struct in_multi **imo_membership; /* group memberships */
117 struct in_mfilter *imo_mfilters; /* source filters */
118};
119
120struct ipstat {
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
154/* flags passed to ip_output as last parameter */
155#define IP_FORWARDING 0x1 /* most of ip header exists */
156#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
157#define IP_SENDONES 0x4 /* send all-ones broadcast */
158#define IP_SENDTOIF 0x8 /* send on specific ifnet */
159#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
160#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
161
162/*
163 * mbuf flag used by ip_fastfwd
164 */
165#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
166
167#ifdef __NO_STRICT_ALIGNMENT
168#define IP_HDR_ALIGNED_P(ip) 1
169#else
170#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
171#endif
172
173struct ip;
174struct inpcb;
175struct route;
176struct sockopt;
177
178extern struct ipstat ipstat;
179extern u_short ip_id; /* ip packet ctr, for ids */
|
| 180extern int ip_do_randomid;
|
180extern int ip_defttl; /* default IP ttl */
181extern int ipforwarding; /* ip forwarding */
182#ifdef IPSTEALTH
183extern int ipstealth; /* stealth forwarding */
184#endif
185extern u_char ip_protox[];
186extern struct socket *ip_rsvpd; /* reservation protocol daemon */
187extern struct socket *ip_mrouter; /* multicast routing daemon */
188extern int (*legal_vif_num)(int);
189extern u_long (*ip_mcast_src)(int);
190extern int rsvp_on;
191extern struct pr_usrreqs rip_usrreqs;
192
193void inp_freemoptions(struct ip_moptions *);
194int inp_getmoptions(struct inpcb *, struct sockopt *);
195int inp_setmoptions(struct inpcb *, struct sockopt *);
196
197int ip_ctloutput(struct socket *, struct sockopt *sopt);
198void ip_drain(void);
199void ip_fini(void *xtp);
200int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
201 u_long if_hwassist_flags, int sw_csum);
202void ip_forward(struct mbuf *m, int srcrt);
203void ip_init(void);
204extern int
205 (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
206 struct ip_moptions *);
207int ip_output(struct mbuf *,
208 struct mbuf *, struct route *, int, struct ip_moptions *,
209 struct inpcb *);
210int ipproto_register(u_char);
211int ipproto_unregister(u_char);
212struct mbuf *
213 ip_reass(struct mbuf *);
214struct in_ifaddr *
215 ip_rtaddr(struct in_addr, u_int fibnum);
216void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
217 struct mbuf *);
218void ip_slowtimo(void);
219u_int16_t ip_randomid(void);
220int rip_ctloutput(struct socket *, struct sockopt *);
221void rip_ctlinput(int, struct sockaddr *, void *);
222void rip_init(void);
223void rip_input(struct mbuf *, int);
224int rip_output(struct mbuf *, struct socket *, u_long);
225void ipip_input(struct mbuf *, int);
226void rsvp_input(struct mbuf *, int);
227int ip_rsvp_init(struct socket *);
228int ip_rsvp_done(void);
229extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
230extern void (*ip_rsvp_force_done)(struct socket *);
231extern void (*rsvp_input_p)(struct mbuf *m, int off);
232
233extern struct pfil_head inet_pfil_hook; /* packet filter hooks */
234
235void in_delayed_cksum(struct mbuf *m);
236
237#endif /* _KERNEL */
238
239#endif /* !_NETINET_IP_VAR_H_ */
| 181extern int ip_defttl; /* default IP ttl */
182extern int ipforwarding; /* ip forwarding */
183#ifdef IPSTEALTH
184extern int ipstealth; /* stealth forwarding */
185#endif
186extern u_char ip_protox[];
187extern struct socket *ip_rsvpd; /* reservation protocol daemon */
188extern struct socket *ip_mrouter; /* multicast routing daemon */
189extern int (*legal_vif_num)(int);
190extern u_long (*ip_mcast_src)(int);
191extern int rsvp_on;
192extern struct pr_usrreqs rip_usrreqs;
193
194void inp_freemoptions(struct ip_moptions *);
195int inp_getmoptions(struct inpcb *, struct sockopt *);
196int inp_setmoptions(struct inpcb *, struct sockopt *);
197
198int ip_ctloutput(struct socket *, struct sockopt *sopt);
199void ip_drain(void);
200void ip_fini(void *xtp);
201int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
202 u_long if_hwassist_flags, int sw_csum);
203void ip_forward(struct mbuf *m, int srcrt);
204void ip_init(void);
205extern int
206 (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
207 struct ip_moptions *);
208int ip_output(struct mbuf *,
209 struct mbuf *, struct route *, int, struct ip_moptions *,
210 struct inpcb *);
211int ipproto_register(u_char);
212int ipproto_unregister(u_char);
213struct mbuf *
214 ip_reass(struct mbuf *);
215struct in_ifaddr *
216 ip_rtaddr(struct in_addr, u_int fibnum);
217void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
218 struct mbuf *);
219void ip_slowtimo(void);
220u_int16_t ip_randomid(void);
221int rip_ctloutput(struct socket *, struct sockopt *);
222void rip_ctlinput(int, struct sockaddr *, void *);
223void rip_init(void);
224void rip_input(struct mbuf *, int);
225int rip_output(struct mbuf *, struct socket *, u_long);
226void ipip_input(struct mbuf *, int);
227void rsvp_input(struct mbuf *, int);
228int ip_rsvp_init(struct socket *);
229int ip_rsvp_done(void);
230extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
231extern void (*ip_rsvp_force_done)(struct socket *);
232extern void (*rsvp_input_p)(struct mbuf *m, int off);
233
234extern struct pfil_head inet_pfil_hook; /* packet filter hooks */
235
236void in_delayed_cksum(struct mbuf *m);
237
238#endif /* _KERNEL */
239
240#endif /* !_NETINET_IP_VAR_H_ */
|