netisr: Add hashcheck method to check and adjust hw provided hash
[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 $
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35 */
36
37#ifndef _NETINET_IP_VAR_H_
38#define _NETINET_IP_VAR_H_
39
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40#ifndef _SYS_TYPES_H_
41#include <sys/types.h>
42#endif
43#ifndef _SYS_QUEUE_H_
984263bc 44#include <sys/queue.h>
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45#endif
46#ifndef _NETINET_IN_H_
47#include <netinet/in.h>
48#endif
49
50#ifdef _KERNEL
51
1bd40720 52#include <machine/endian.h>
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53#ifndef _MACHINE_PARAM_H_
54#include <machine/param.h>
55#endif
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56#ifndef _NET_ROUTE_H
57#include <net/route.h>
58#endif
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59
60#endif
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61
62/*
63 * Overlay for ip header used by other protocols (tcp, udp).
64 */
65struct ipovly {
66 u_char ih_x1[9]; /* (unused) */
67 u_char ih_pr; /* protocol */
68 u_short ih_len; /* protocol length */
69 struct in_addr ih_src; /* source internet address */
70 struct in_addr ih_dst; /* destination internet address */
71};
72
73/*
74 * Ip reassembly queue structure. Each fragment
75 * being reassembled is attached to one of these structures.
76 * They are timed out after ipq_ttl drops to 0, and may also
77 * be reclaimed if memory becomes tight.
78 */
79struct ipq {
83c38804 80 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
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81 u_char ipq_ttl; /* time for reass q to live */
82 u_char ipq_p; /* protocol of this fragment */
83 u_short ipq_id; /* sequence id for reassembly */
84 struct mbuf *ipq_frags; /* to ip headers of fragments */
85 struct in_addr ipq_src,ipq_dst;
86 u_char ipq_nfrags; /* # frags in this packet */
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87};
88
89/*
90 * Structure stored in mbuf in inpcb.ip_options
91 * and passed to ip_output when ip options are in use.
92 * The actual length of the options (including ipopt_dst)
93 * is in m_len.
94 */
95#define MAX_IPOPTLEN 40
96
97struct ipoption {
98 struct in_addr ipopt_dst; /* first-hop dst if source routed */
99 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
100};
101
102/*
103 * Structure attached to inpcb.ip_moptions and
104 * passed to ip_output when IP multicast options are in use.
105 */
106struct ip_moptions {
107 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
108 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
109 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
110 u_char imo_multicast_loop; /* 1 => hear sends if a member */
111 u_short imo_num_memberships; /* no. memberships this socket */
0d16ba1d 112 u_short imo_max_memberships; /* max memberships this socket */
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113 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
114 u_long imo_multicast_vif; /* vif num outgoing multicasts */
115};
116
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117/*
118 * IP Statistics.
119 */
120struct ip_stats {
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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
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154#if defined(SMP)
155#define ipstat ipstats_percpu[mycpuid]
156#else /* !SMP */
157#define ipstat ipstats_percpu[0]
158#endif
159
160extern struct ip_stats ipstats_percpu[MAXCPU];
161
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162/* flags passed to ip_output as last parameter */
163#define IP_FORWARDING 0x1 /* most of ip header exists */
164#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
165#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
166#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
facaabe1 167#define IP_DEBUGROUTE 0x10000 /* debug route */
984263bc 168
c3c96e44 169/* direction passed to ip_cpufn as last parameter */
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170#define IP_MPORT_IN 0 /* Find lwkt port for incoming packets */
171#define IP_MPORT_OUT 1 /* Find lwkt port for outgoing packets */
172
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173struct ip;
174struct inpcb;
175struct route;
176struct sockopt;
bf82f9b7 177struct lwkt_port;
8a5c0ed6 178struct pktinfo;
002c1265 179union netmsg;
984263bc 180
984263bc 181extern u_short ip_id; /* ip packet ctr, for ids */
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182extern int ip_defttl; /* default IP ttl */
183extern int ipforwarding; /* ip forwarding */
984263bc 184extern u_char ip_protox[];
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185extern struct socket *ip_rsvpd; /* reservation protocol daemon */
186extern struct socket *ip_mrouter; /* multicast routing daemon */
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187extern int (*legal_vif_num)(int);
188extern u_long (*ip_mcast_src)(int);
189extern int rsvp_on;
190extern struct pr_usrreqs rip_usrreqs;
191
002c1265 192void ip_ctloutput(union netmsg *);
984263bc 193void ip_drain(void);
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194int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
195 u_long if_hwassist_flags, int sw_csum);
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196struct mbuf *
197 ip_reass(struct mbuf *);
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198void ip_freemoptions(struct ip_moptions *);
199void ip_init(void);
200extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
201 struct ip_moptions *);
48e7b118 202
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203void ip_cpufn(struct mbuf **, int, int);
204void ip_cpufn_in(struct mbuf **, int);
e6f77b88 205void ip_hashcheck(struct mbuf *, const struct pktinfo *);
48e7b118 206
1e316d14 207boolean_t
c3c96e44 208 ip_lengthcheck(struct mbuf **, int);
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209int ip_output(struct mbuf *,
210 struct mbuf *, struct route *, int, struct ip_moptions *,
211 struct inpcb *);
212struct in_ifaddr *
213 ip_rtaddr(struct in_addr, struct route *);
214void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
215 struct mbuf *);
216void ip_slowtimo(void);
217struct mbuf *
7e31206a 218 ip_srcroute(struct mbuf *);
bddf0751 219void ip_stripoptions(struct mbuf *);
6277137d 220u_int16_t ip_randomid(void);
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221void rip_ctloutput(union netmsg *);
222void rip_ctlinput(union netmsg *);
984263bc 223void rip_init(void);
002c1265 224int rip_input(struct mbuf **, int *, int);
deffea2e 225int rip_output(struct mbuf *, struct socket *, ...);
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226extern int (*ipip_input)(struct mbuf **, int *, int);
227int rsvp_input(struct mbuf **, int *, int);
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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 *);
002c1265 232extern int (*rsvp_input_p)(struct mbuf **, int *, int);
984263bc 233
e7e55f42 234extern struct pfil_head inet_pfil_hook;
e7e55f42 235
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236void in_delayed_cksum(struct mbuf *m);
237
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238static __inline uint16_t ip_newid(void);
239extern int ip_do_randomid;
240
241static __inline uint16_t
242ip_newid(void)
243{
244 if (ip_do_randomid)
245 return ip_randomid();
246 else
1bd40720 247 return __htons(ip_id++);
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248}
249
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250#endif /* _KERNEL */
251
252#endif /* !_NETINET_IP_VAR_H_ */