FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_var.h
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
34 * $FreeBSD: releng/5.0/sys/netinet/ip_var.h 107112 2002-11-20 18:56:25Z luigi $
35 */
36
37 #ifndef _NETINET_IP_VAR_H_
38 #define _NETINET_IP_VAR_H_
39
40 #include <sys/queue.h>
41
42 #ifdef _KERNEL
43 #include <sys/_label.h>
44 #endif
45
46 /*
47 * Overlay for ip header used by other protocols (tcp, udp).
48 */
49 struct ipovly {
50 u_char ih_x1[9]; /* (unused) */
51 u_char ih_pr; /* protocol */
52 u_short ih_len; /* protocol length */
53 struct in_addr ih_src; /* source internet address */
54 struct in_addr ih_dst; /* destination internet address */
55 };
56
57 #ifdef _KERNEL
58 /*
59 * Ip reassembly queue structure. Each fragment
60 * being reassembled is attached to one of these structures.
61 * They are timed out after ipq_ttl drops to 0, and may also
62 * be reclaimed if memory becomes tight.
63 */
64 struct ipq {
65 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
66 u_char ipq_ttl; /* time for reass q to live */
67 u_char ipq_p; /* protocol of this fragment */
68 u_short ipq_id; /* sequence id for reassembly */
69 struct mbuf *ipq_frags; /* to ip headers of fragments */
70 struct in_addr ipq_src,ipq_dst;
71 u_int32_t ipq_div_info; /* ipfw divert port & flags */
72 u_int16_t ipq_div_cookie; /* ipfw divert cookie */
73 struct label ipq_label; /* MAC label */
74 };
75 #endif /* _KERNEL */
76
77 /*
78 * Structure stored in mbuf in inpcb.ip_options
79 * and passed to ip_output when ip options are in use.
80 * The actual length of the options (including ipopt_dst)
81 * is in m_len.
82 */
83 #define MAX_IPOPTLEN 40
84
85 struct ipoption {
86 struct in_addr ipopt_dst; /* first-hop dst if source routed */
87 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
88 };
89
90 /*
91 * Structure attached to inpcb.ip_moptions and
92 * passed to ip_output when IP multicast options are in use.
93 */
94 struct ip_moptions {
95 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
96 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
97 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
98 u_char imo_multicast_loop; /* 1 => hear sends if a member */
99 u_short imo_num_memberships; /* no. memberships this socket */
100 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
101 u_long imo_multicast_vif; /* vif num outgoing multicasts */
102 };
103
104 struct ipstat {
105 u_long ips_total; /* total packets received */
106 u_long ips_badsum; /* checksum bad */
107 u_long ips_tooshort; /* packet too short */
108 u_long ips_toosmall; /* not enough data */
109 u_long ips_badhlen; /* ip header length < data size */
110 u_long ips_badlen; /* ip length < ip header length */
111 u_long ips_fragments; /* fragments received */
112 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
113 u_long ips_fragtimeout; /* fragments timed out */
114 u_long ips_forward; /* packets forwarded */
115 u_long ips_fastforward; /* packets fast forwarded */
116 u_long ips_cantforward; /* packets rcvd for unreachable dest */
117 u_long ips_redirectsent; /* packets forwarded on same net */
118 u_long ips_noproto; /* unknown or unsupported protocol */
119 u_long ips_delivered; /* datagrams delivered to upper level*/
120 u_long ips_localout; /* total ip packets generated here */
121 u_long ips_odropped; /* lost packets due to nobufs, etc. */
122 u_long ips_reassembled; /* total packets reassembled ok */
123 u_long ips_fragmented; /* datagrams successfully fragmented */
124 u_long ips_ofragments; /* output fragments created */
125 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
126 u_long ips_badoptions; /* error in option processing */
127 u_long ips_noroute; /* packets discarded due to no route */
128 u_long ips_badvers; /* ip version != 4 */
129 u_long ips_rawout; /* total raw ip packets generated */
130 u_long ips_toolong; /* ip length > max ip packet size */
131 u_long ips_notmember; /* multicasts for unregistered grps */
132 u_long ips_nogif; /* no match gif found */
133 u_long ips_badaddr; /* invalid address on header */
134 };
135
136 #ifdef _KERNEL
137
138 /* flags passed to ip_output as last parameter */
139 #define IP_FORWARDING 0x1 /* most of ip header exists */
140 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
141 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
142 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
143
144 struct ip;
145 struct inpcb;
146 struct route;
147 struct sockopt;
148
149 extern struct ipstat ipstat;
150 #ifndef RANDOM_IP_ID
151 extern u_short ip_id; /* ip packet ctr, for ids */
152 #endif
153 extern int ip_defttl; /* default IP ttl */
154 extern int ipforwarding; /* ip forwarding */
155 extern struct route ipforward_rt; /* ip forwarding cached route */
156 extern u_char ip_protox[];
157 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
158 extern struct socket *ip_mrouter; /* multicast routing daemon */
159 extern int (*legal_vif_num)(int);
160 extern u_long (*ip_mcast_src)(int);
161 extern int rsvp_on;
162 extern struct pr_usrreqs rip_usrreqs;
163
164 int ip_ctloutput(struct socket *, struct sockopt *sopt);
165 void ip_drain(void);
166 void ip_freemoptions(struct ip_moptions *);
167 void ip_init(void);
168 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
169 struct ip_moptions *);
170 int ip_output(struct mbuf *,
171 struct mbuf *, struct route *, int, struct ip_moptions *,
172 struct inpcb *);
173 struct in_ifaddr *
174 ip_rtaddr(struct in_addr, struct route *);
175 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
176 struct mbuf *);
177 void ip_slowtimo(void);
178 struct mbuf *
179 ip_srcroute(void);
180 void ip_stripoptions(struct mbuf *, struct mbuf *);
181 #ifdef RANDOM_IP_ID
182 u_int16_t
183 ip_randomid(void);
184 #endif
185 int rip_ctloutput(struct socket *, struct sockopt *);
186 void rip_ctlinput(int, struct sockaddr *, void *);
187 void rip_init(void);
188 void rip_input(struct mbuf *, int);
189 int rip_output(struct mbuf *, struct socket *, u_long);
190 void ipip_input(struct mbuf *, int);
191 void rsvp_input(struct mbuf *, int);
192 int ip_rsvp_init(struct socket *);
193 int ip_rsvp_done(void);
194 extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
195 extern void (*ip_rsvp_force_done)(struct socket *);
196 extern void (*rsvp_input_p)(struct mbuf *m, int off);
197
198
199 #ifdef IPDIVERT
200 void div_init(void);
201 void div_input(struct mbuf *, int);
202 void divert_packet(struct mbuf *m, int incoming, int port, int rule);
203 extern struct pr_usrreqs div_usrreqs;
204 #endif
205
206 void in_delayed_cksum(struct mbuf *m);
207
208 #endif /* _KERNEL */
209
210 #endif /* !_NETINET_IP_VAR_H_ */
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