1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/* $OpenBSD: ip_var.h,v 1.86 2019/12/08 11:08:22 sashan Exp $ */
/* $NetBSD: ip_var.h,v 1.16 1996/02/13 23:43:20 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ip_var.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _NETINET_IP_VAR_H_
#define _NETINET_IP_VAR_H_
/*
* Structure stored in mbuf in inpcb.ip_options
* and passed to ip_output when ip options are in use.
* The actual length of the options (including ipopt_dst)
* is in m_len.
*/
#define MAX_IPOPTLEN 40
/*
* Overlay for ip header used by other protocols (tcp, udp).
*/
struct ipovly {
u_int8_t ih_x1[9]; /* (unused) */
u_int8_t ih_pr; /* protocol */
u_int16_t ih_len; /* protocol length */
struct in_addr ih_src; /* source internet address */
struct in_addr ih_dst; /* destination internet address */
};
struct ipstat {
u_long ips_total; /* total packets received */
u_long ips_badsum; /* checksum bad */
u_long ips_tooshort; /* packet too short */
u_long ips_toosmall; /* not enough data */
u_long ips_badhlen; /* ip header length < data size */
u_long ips_badlen; /* ip length < ip header length */
u_long ips_fragments; /* fragments received */
u_long ips_fragdropped; /* frags dropped (dups, out of space) */
u_long ips_fragtimeout; /* fragments timed out */
u_long ips_forward; /* packets forwarded */
u_long ips_cantforward; /* packets rcvd for unreachable dest */
u_long ips_redirectsent; /* packets forwarded on same net */
u_long ips_noproto; /* unknown or unsupported protocol */
u_long ips_delivered; /* datagrams delivered to upper level*/
u_long ips_localout; /* total ip packets generated here */
u_long ips_odropped; /* lost packets due to nobufs, etc. */
u_long ips_reassembled; /* total packets reassembled ok */
u_long ips_fragmented; /* datagrams successfully fragmented */
u_long ips_ofragments; /* output fragments created */
u_long ips_cantfrag; /* don't fragment flag was set, etc. */
u_long ips_badoptions; /* error in option processing */
u_long ips_noroute; /* packets discarded due to no route */
u_long ips_badvers; /* ip version != 4 */
u_long ips_rawout; /* total raw ip packets generated */
u_long ips_badfrags; /* malformed fragments (bad length) */
u_long ips_rcvmemdrop; /* frags dropped for lack of memory */
u_long ips_toolong; /* ip length > max ip packet size */
u_long ips_nogif; /* no match gif found */
u_long ips_badaddr; /* invalid address on header */
u_long ips_inswcsum; /* software checksummed on input */
u_long ips_outswcsum; /* software checksummed on output */
u_long ips_notmember; /* multicasts for unregistered groups */
u_long ips_wrongif; /* packet received on wrong interface */
};
struct ipoption {
struct in_addr ipopt_dst; /* first-hop dst if source routed */
int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
};
#ifdef _KERNEL
#include <sys/percpu.h>
enum ipstat_counters {
ips_total, /* total packets received */
ips_badsum, /* checksum bad */
ips_tooshort, /* packet too short */
ips_toosmall, /* not enough data */
ips_badhlen, /* ip header length < data size */
ips_badlen, /* ip length < ip header length */
ips_fragments, /* fragments received */
ips_fragdropped, /* frags dropped (dups, out of space) */
ips_fragtimeout, /* fragments timed out */
ips_forward, /* packets forwarded */
ips_cantforward, /* packets rcvd for unreachable dest */
ips_redirectsent, /* packets forwarded on same net */
ips_noproto, /* unknown or unsupported protocol */
ips_delivered, /* datagrams delivered to upper level*/
ips_localout, /* total ip packets generated here */
ips_odropped, /* lost packets due to nobufs, etc. */
ips_reassembled, /* total packets reassembled ok */
ips_fragmented, /* datagrams successfully fragmented */
ips_ofragments, /* output fragments created */
ips_cantfrag, /* don't fragment flag was set, etc. */
ips_badoptions, /* error in option processing */
ips_noroute, /* packets discarded due to no route */
ips_badvers, /* ip version != 4 */
ips_rawout, /* total raw ip packets generated */
ips_badfrags, /* malformed fragments (bad length) */
ips_rcvmemdrop, /* frags dropped for lack of memory */
ips_toolong, /* ip length > max ip packet size */
ips_nogif, /* no match gif found */
ips_badaddr, /* invalid address on header */
ips_inswcsum, /* software checksummed on input */
ips_outswcsum, /* software checksummed on output */
ips_notmember, /* multicasts for unregistered groups */
ips_wrongif, /* packet received on wrong interface */
ips_ncounters
};
extern struct cpumem *ipcounters;
static inline void
ipstat_inc(enum ipstat_counters c)
{
counters_inc(ipcounters, c);
}
/*
* Structure attached to inpcb.ip_moptions and
* passed to ip_output when IP multicast options are in use.
*/
struct ip_moptions {
struct in_multi **imo_membership; /* group memberships */
unsigned short imo_ifidx; /* ifp index for outgoing multicasts */
u_int8_t imo_ttl; /* TTL for outgoing multicasts */
u_int8_t imo_loop; /* 1 => hear sends if a member */
u_int16_t imo_num_memberships; /* no. memberships this socket */
u_int16_t imo_max_memberships; /* max memberships this socket */
};
#include <sys/queue.h>
/*
* Ip reassembly queue structures.
*/
LIST_HEAD(ipqehead, ipqent);
struct ipqent {
LIST_ENTRY(ipqent) ipqe_q;
struct ip *ipqe_ip;
struct mbuf *ipqe_m; /* mbuf contains packet */
u_int8_t ipqe_mff; /* for IP fragmentation */
};
/*
* Ip reassembly queue structure. Each fragment
* being reassembled is attached to one of these structures.
* They are timed out after ipq_ttl drops to 0, and may also
* be reclaimed if memory becomes tight.
*/
struct ipq {
LIST_ENTRY(ipq) ipq_q; /* to other reass headers */
u_int8_t ipq_ttl; /* time for reass q to live */
u_int8_t ipq_p; /* protocol of this fragment */
u_int16_t ipq_id; /* sequence id for reassembly */
struct ipqehead ipq_fragq; /* to ip fragment queue */
struct in_addr ipq_src, ipq_dst;
};
/* flags passed to ip_output */
#define IP_FORWARDING 0x1 /* most of ip header exists */
#define IP_RAWOUTPUT 0x2 /* raw ip header exists */
#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
#define IP_MTUDISC 0x0800 /* pmtu discovery, set DF */
extern struct ipstat ipstat;
extern int ip_defttl; /* default IP ttl */
#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */
extern int ip_mtudisc; /* mtu discovery */
extern u_int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
extern int ipport_firstauto; /* min port for port allocation */
extern int ipport_lastauto; /* max port for port allocation */
extern int ipport_hifirstauto; /* min dynamic/private port number */
extern int ipport_hilastauto; /* max dynamic/private port number */
extern int ipforwarding; /* enable IP forwarding */
#ifdef MROUTING
extern int ipmforwarding; /* enable multicast forwarding */
#endif
extern int ipmultipath; /* enable multipath routing */
extern int la_hold_total;
extern struct rttimer_queue *ip_mtudisc_timeout_q;
extern struct pool ipqent_pool;
struct route;
struct inpcb;
int ip_ctloutput(int, struct socket *, int, int, struct mbuf *);
void ip_flush(void);
int ip_fragment(struct mbuf *, struct ifnet *, u_long);
void ip_freef(struct ipq *);
void ip_freemoptions(struct ip_moptions *);
int ip_getmoptions(int, struct ip_moptions *, struct mbuf *);
void ip_init(void);
struct mbuf*
ip_insertoptions(struct mbuf *, struct mbuf *, int *);
int ip_mforward(struct mbuf *, struct ifnet *);
int ip_optcopy(struct ip *, struct ip *);
int ip_output(struct mbuf *, struct mbuf *, struct route *, int,
struct ip_moptions *, struct inpcb *, u_int32_t);
struct mbuf *
ip_reass(struct ipqent *, struct ipq *);
u_int16_t
ip_randomid(void);
void ip_send(struct mbuf *);
void ip_slowtimo(void);
struct mbuf *
ip_srcroute(struct mbuf *);
void ip_stripoptions(struct mbuf *);
int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
struct mbuf *);
void ipintr(void);
int ip_input_if(struct mbuf **, int *, int, int, struct ifnet *);
int ip_deliver(struct mbuf **, int *, int, int);
void ip_forward(struct mbuf *, struct ifnet *, struct rtentry *, int);
int rip_ctloutput(int, struct socket *, int, int, struct mbuf *);
void rip_init(void);
int rip_input(struct mbuf **, int *, int, int);
int rip_output(struct mbuf *, struct socket *, struct sockaddr *,
struct mbuf *);
int rip_usrreq(struct socket *,
int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
int rip_attach(struct socket *, int);
int rip_detach(struct socket *);
#ifdef MROUTING
extern struct socket *ip_mrouter[]; /* multicast routing daemon */
#endif
#endif /* _KERNEL */
#endif /* _NETINET_IP_VAR_H_ */
|
