network - Move socket from netmsg ext to netmsg header, add port to socket
[dragonfly.git] / sys / netinet / ip_var.h
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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
f1f552f6 34 * $FreeBSD: src/sys/netinet/ip_var.h,v 1.50.2.13 2003/08/24 08:24:38 hsu Exp $
0030d31a 35 * $DragonFly: src/sys/netinet/ip_var.h,v 1.27 2008/09/13 08:48:42 sephe Exp $
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36 */
37
38#ifndef _NETINET_IP_VAR_H_
39#define _NETINET_IP_VAR_H_
40
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41#ifndef _SYS_TYPES_H_
42#include <sys/types.h>
43#endif
44#ifndef _SYS_QUEUE_H_
984263bc 45#include <sys/queue.h>
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46#endif
47#ifndef _NETINET_IN_H_
48#include <netinet/in.h>
49#endif
50
51#ifdef _KERNEL
52
53#ifndef _MACHINE_ENDIAN_H_
54#include <machine/endian.h>
55#endif
56#ifndef _MACHINE_PARAM_H_
57#include <machine/param.h>
58#endif
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59#ifndef _NET_ROUTE_H
60#include <net/route.h>
61#endif
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62
63#endif
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64
65/*
66 * Overlay for ip header used by other protocols (tcp, udp).
67 */
68struct ipovly {
69 u_char ih_x1[9]; /* (unused) */
70 u_char ih_pr; /* protocol */
71 u_short ih_len; /* protocol length */
72 struct in_addr ih_src; /* source internet address */
73 struct in_addr ih_dst; /* destination internet address */
74};
75
76/*
77 * Ip reassembly queue structure. Each fragment
78 * being reassembled is attached to one of these structures.
79 * They are timed out after ipq_ttl drops to 0, and may also
80 * be reclaimed if memory becomes tight.
81 */
82struct ipq {
83 struct ipq *next,*prev; /* to other reass headers */
84 u_char ipq_ttl; /* time for reass q to live */
85 u_char ipq_p; /* protocol of this fragment */
86 u_short ipq_id; /* sequence id for reassembly */
87 struct mbuf *ipq_frags; /* to ip headers of fragments */
88 struct in_addr ipq_src,ipq_dst;
89 u_char ipq_nfrags; /* # frags in this packet */
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90};
91
92/*
93 * Structure stored in mbuf in inpcb.ip_options
94 * and passed to ip_output when ip options are in use.
95 * The actual length of the options (including ipopt_dst)
96 * is in m_len.
97 */
98#define MAX_IPOPTLEN 40
99
100struct ipoption {
101 struct in_addr ipopt_dst; /* first-hop dst if source routed */
102 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
103};
104
105/*
106 * Structure attached to inpcb.ip_moptions and
107 * passed to ip_output when IP multicast options are in use.
108 */
109struct ip_moptions {
110 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
111 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
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 */
0d16ba1d 115 u_short imo_max_memberships; /* max memberships this socket */
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116 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
117 u_long imo_multicast_vif; /* vif num outgoing multicasts */
118};
119
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120/*
121 * IP Statistics.
122 */
123struct ip_stats {
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124 u_long ips_total; /* total packets received */
125 u_long ips_badsum; /* checksum bad */
126 u_long ips_tooshort; /* packet too short */
127 u_long ips_toosmall; /* not enough data */
128 u_long ips_badhlen; /* ip header length < data size */
129 u_long ips_badlen; /* ip length < ip header length */
130 u_long ips_fragments; /* fragments received */
131 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
132 u_long ips_fragtimeout; /* fragments timed out */
133 u_long ips_forward; /* packets forwarded */
134 u_long ips_fastforward; /* packets fast forwarded */
135 u_long ips_cantforward; /* packets rcvd for unreachable dest */
136 u_long ips_redirectsent; /* packets forwarded on same net */
137 u_long ips_noproto; /* unknown or unsupported protocol */
138 u_long ips_delivered; /* datagrams delivered to upper level*/
139 u_long ips_localout; /* total ip packets generated here */
140 u_long ips_odropped; /* lost packets due to nobufs, etc. */
141 u_long ips_reassembled; /* total packets reassembled ok */
142 u_long ips_fragmented; /* datagrams successfully fragmented */
143 u_long ips_ofragments; /* output fragments created */
144 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
145 u_long ips_badoptions; /* error in option processing */
146 u_long ips_noroute; /* packets discarded due to no route */
147 u_long ips_badvers; /* ip version != 4 */
148 u_long ips_rawout; /* total raw ip packets generated */
149 u_long ips_toolong; /* ip length > max ip packet size */
150 u_long ips_notmember; /* multicasts for unregistered grps */
151 u_long ips_nogif; /* no match gif found */
152 u_long ips_badaddr; /* invalid address on header */
153};
154
155#ifdef _KERNEL
156
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157#if defined(SMP)
158#define ipstat ipstats_percpu[mycpuid]
159#else /* !SMP */
160#define ipstat ipstats_percpu[0]
161#endif
162
163extern struct ip_stats ipstats_percpu[MAXCPU];
164
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165/* flags passed to ip_output as last parameter */
166#define IP_FORWARDING 0x1 /* most of ip header exists */
167#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
168#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
169#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
facaabe1 170#define IP_DEBUGROUTE 0x10000 /* debug route */
984263bc 171
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172/* direction passed to ip_mport as last parameter */
173#define IP_MPORT_IN 0 /* Find lwkt port for incoming packets */
174#define IP_MPORT_OUT 1 /* Find lwkt port for outgoing packets */
175
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176struct ip;
177struct inpcb;
178struct route;
179struct sockopt;
bf82f9b7 180struct lwkt_port;
8a5c0ed6 181struct pktinfo;
984263bc 182
984263bc 183extern u_short ip_id; /* ip packet ctr, for ids */
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184extern int ip_defttl; /* default IP ttl */
185extern int ipforwarding; /* ip forwarding */
984263bc 186extern u_char ip_protox[];
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187extern struct socket *ip_rsvpd; /* reservation protocol daemon */
188extern struct socket *ip_mrouter; /* multicast routing daemon */
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189extern int (*legal_vif_num)(int);
190extern u_long (*ip_mcast_src)(int);
191extern int rsvp_on;
192extern struct pr_usrreqs rip_usrreqs;
193
194int ip_ctloutput(struct socket *, struct sockopt *sopt);
195void ip_drain(void);
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196int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
197 u_long if_hwassist_flags, int sw_csum);
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198struct mbuf *
199 ip_reass(struct mbuf *);
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200void ip_freemoptions(struct ip_moptions *);
201void ip_init(void);
202extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
203 struct ip_moptions *);
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204
205struct lwkt_port *ip_mport(struct mbuf **, int);
206struct lwkt_port *ip_mport_in(struct mbuf **);
207struct lwkt_port *ip_mport_pktinfo(const struct pktinfo *, struct mbuf *);
208
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209boolean_t
210 ip_lengthcheck(struct mbuf **);
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211int ip_output(struct mbuf *,
212 struct mbuf *, struct route *, int, struct ip_moptions *,
213 struct inpcb *);
214struct in_ifaddr *
215 ip_rtaddr(struct in_addr, struct route *);
216void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
217 struct mbuf *);
218void ip_slowtimo(void);
219struct mbuf *
7e31206a 220 ip_srcroute(struct mbuf *);
bddf0751 221void ip_stripoptions(struct mbuf *);
6277137d 222u_int16_t ip_randomid(void);
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223int rip_ctloutput(struct socket *, struct sockopt *);
224void rip_ctlinput(int, struct sockaddr *, void *);
225void rip_init(void);
a00138cb 226void rip_input(struct mbuf *, ...);
deffea2e 227int rip_output(struct mbuf *, struct socket *, ...);
984263bc 228extern void (*ipip_input)(struct mbuf *, int, int);
a00138cb 229void rsvp_input(struct mbuf *, ...);
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230int ip_rsvp_init(struct socket *);
231int ip_rsvp_done(void);
232extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
233extern void (*ip_rsvp_force_done)(struct socket *);
a00138cb 234extern void (*rsvp_input_p)(struct mbuf *m, ...);
984263bc 235
e7e55f42 236extern struct pfil_head inet_pfil_hook;
e7e55f42 237
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238void in_delayed_cksum(struct mbuf *m);
239
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240static __inline uint16_t ip_newid(void);
241extern int ip_do_randomid;
242
243static __inline uint16_t
244ip_newid(void)
245{
246 if (ip_do_randomid)
247 return ip_randomid();
248 else
1bd40720 249 return __htons(ip_id++);
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250}
251
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252#endif /* _KERNEL */
253
254#endif /* !_NETINET_IP_VAR_H_ */