Network threading stage 1/3: netisrs are already software interrupts,
[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 $
bf82f9b7 35 * $DragonFly: src/sys/netinet/ip_var.h,v 1.4 2003/11/08 07:57:51 dillon Exp $
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36 */
37
38#ifndef _NETINET_IP_VAR_H_
39#define _NETINET_IP_VAR_H_
40
41#include <sys/queue.h>
42
43/*
44 * Overlay for ip header used by other protocols (tcp, udp).
45 */
46struct ipovly {
47 u_char ih_x1[9]; /* (unused) */
48 u_char ih_pr; /* protocol */
49 u_short ih_len; /* protocol length */
50 struct in_addr ih_src; /* source internet address */
51 struct in_addr ih_dst; /* destination internet address */
52};
53
54/*
55 * Ip reassembly queue structure. Each fragment
56 * being reassembled is attached to one of these structures.
57 * They are timed out after ipq_ttl drops to 0, and may also
58 * be reclaimed if memory becomes tight.
59 */
60struct ipq {
61 struct ipq *next,*prev; /* to other reass headers */
62 u_char ipq_ttl; /* time for reass q to live */
63 u_char ipq_p; /* protocol of this fragment */
64 u_short ipq_id; /* sequence id for reassembly */
65 struct mbuf *ipq_frags; /* to ip headers of fragments */
66 struct in_addr ipq_src,ipq_dst;
67 u_char ipq_nfrags; /* # frags in this packet */
68#ifdef IPDIVERT
69 u_int32_t ipq_div_info; /* ipfw divert port & flags */
70 u_int16_t ipq_div_cookie; /* ipfw divert cookie */
71#endif
72};
73
74/*
75 * Structure stored in mbuf in inpcb.ip_options
76 * and passed to ip_output when ip options are in use.
77 * The actual length of the options (including ipopt_dst)
78 * is in m_len.
79 */
80#define MAX_IPOPTLEN 40
81
82struct ipoption {
83 struct in_addr ipopt_dst; /* first-hop dst if source routed */
84 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
85};
86
87/*
88 * Structure attached to inpcb.ip_moptions and
89 * passed to ip_output when IP multicast options are in use.
90 */
91struct ip_moptions {
92 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
93 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
94 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
95 u_char imo_multicast_loop; /* 1 => hear sends if a member */
96 u_short imo_num_memberships; /* no. memberships this socket */
97 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
98 u_long imo_multicast_vif; /* vif num outgoing multicasts */
99};
100
101struct ipstat {
102 u_long ips_total; /* total packets received */
103 u_long ips_badsum; /* checksum bad */
104 u_long ips_tooshort; /* packet too short */
105 u_long ips_toosmall; /* not enough data */
106 u_long ips_badhlen; /* ip header length < data size */
107 u_long ips_badlen; /* ip length < ip header length */
108 u_long ips_fragments; /* fragments received */
109 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
110 u_long ips_fragtimeout; /* fragments timed out */
111 u_long ips_forward; /* packets forwarded */
112 u_long ips_fastforward; /* packets fast forwarded */
113 u_long ips_cantforward; /* packets rcvd for unreachable dest */
114 u_long ips_redirectsent; /* packets forwarded on same net */
115 u_long ips_noproto; /* unknown or unsupported protocol */
116 u_long ips_delivered; /* datagrams delivered to upper level*/
117 u_long ips_localout; /* total ip packets generated here */
118 u_long ips_odropped; /* lost packets due to nobufs, etc. */
119 u_long ips_reassembled; /* total packets reassembled ok */
120 u_long ips_fragmented; /* datagrams successfully fragmented */
121 u_long ips_ofragments; /* output fragments created */
122 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
123 u_long ips_badoptions; /* error in option processing */
124 u_long ips_noroute; /* packets discarded due to no route */
125 u_long ips_badvers; /* ip version != 4 */
126 u_long ips_rawout; /* total raw ip packets generated */
127 u_long ips_toolong; /* ip length > max ip packet size */
128 u_long ips_notmember; /* multicasts for unregistered grps */
129 u_long ips_nogif; /* no match gif found */
130 u_long ips_badaddr; /* invalid address on header */
131};
132
133#ifdef _KERNEL
134
135/* flags passed to ip_output as last parameter */
136#define IP_FORWARDING 0x1 /* most of ip header exists */
137#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
138#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
139#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
140
141struct ip;
142struct inpcb;
143struct route;
144struct sockopt;
bf82f9b7 145struct lwkt_port;
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146
147extern struct ipstat ipstat;
148#ifndef RANDOM_IP_ID
149extern u_short ip_id; /* ip packet ctr, for ids */
150#endif
151extern int ip_defttl; /* default IP ttl */
152extern int ipforwarding; /* ip forwarding */
153extern struct route ipforward_rt; /* ip forwarding cached route */
154extern u_char ip_protox[];
155extern struct socket *ip_rsvpd; /* reservation protocol daemon */
156extern struct socket *ip_mrouter; /* multicast routing daemon */
157extern int (*legal_vif_num)(int);
158extern u_long (*ip_mcast_src)(int);
159extern int rsvp_on;
160extern struct pr_usrreqs rip_usrreqs;
161
162int ip_ctloutput(struct socket *, struct sockopt *sopt);
163void ip_drain(void);
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164int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
165 u_long if_hwassist_flags, int sw_csum);
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166void ip_freemoptions(struct ip_moptions *);
167void ip_init(void);
168extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
169 struct ip_moptions *);
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170struct lwkt_port *
171 ip_mport(struct mbuf *);
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172int ip_output(struct mbuf *,
173 struct mbuf *, struct route *, int, struct ip_moptions *,
174 struct inpcb *);
175struct in_ifaddr *
176 ip_rtaddr(struct in_addr, struct route *);
177void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
178 struct mbuf *);
179void ip_slowtimo(void);
180struct mbuf *
181 ip_srcroute(void);
182void ip_stripoptions(struct mbuf *, struct mbuf *);
183#ifdef RANDOM_IP_ID
184u_int16_t
185 ip_randomid(void);
186#endif
187int rip_ctloutput(struct socket *, struct sockopt *);
188void rip_ctlinput(int, struct sockaddr *, void *);
189void rip_init(void);
190void rip_input(struct mbuf *, int, int);
191int rip_output(struct mbuf *, struct socket *, u_long);
192extern void (*ipip_input)(struct mbuf *, int, int);
193void rsvp_input(struct mbuf *, int, int);
194int ip_rsvp_init(struct socket *);
195int ip_rsvp_done(void);
196extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
197extern void (*ip_rsvp_force_done)(struct socket *);
198extern void (*rsvp_input_p)(struct mbuf *m, int off, int proto);
199
200#ifdef IPDIVERT
201void div_init(void);
202void div_input(struct mbuf *, int, int);
203void divert_packet(struct mbuf *m, int incoming, int port, int rule);
204extern struct pr_usrreqs div_usrreqs;
205#endif
206
207void in_delayed_cksum(struct mbuf *m);
208
209#endif /* _KERNEL */
210
211#endif /* !_NETINET_IP_VAR_H_ */