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/*
2
 * Copyright (c) 1982, 1986, 1990, 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
 *      @(#)in.h        8.3 (Berkeley) 1/3/94
34
 * $Id: in.h,v 1.2 2001-09-27 12:01:55 chris Exp $
35
 */
36
 
37
#ifndef _NETINET_IN_H_
38
#define _NETINET_IN_H_
39
 
40
/*
41
 * Constants and structures defined by the internet system,
42
 * Per RFC 790, September 1981, and numerous additions.
43
 */
44
 
45
/*
46
 * Protocols (RFC 1700)
47
 */
48
#define IPPROTO_IP              0                /* dummy for IP */
49
#define IPPROTO_ICMP            1               /* control message protocol */
50
#define IPPROTO_IGMP            2               /* group mgmt protocol */
51
#define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
52
#define IPPROTO_IPIP            4               /* IP encapsulation in IP */
53
#define IPPROTO_TCP             6               /* tcp */
54
#define IPPROTO_ST              7               /* Stream protocol II */
55
#define IPPROTO_EGP             8               /* exterior gateway protocol */
56
#define IPPROTO_PIGP            9               /* private interior gateway */
57
#define IPPROTO_RCCMON          10              /* BBN RCC Monitoring */
58
#define IPPROTO_NVPII           11              /* network voice protocol*/
59
#define IPPROTO_PUP             12              /* pup */
60
#define IPPROTO_ARGUS           13              /* Argus */
61
#define IPPROTO_EMCON           14              /* EMCON */
62
#define IPPROTO_XNET            15              /* Cross Net Debugger */
63
#define IPPROTO_CHAOS           16              /* Chaos*/
64
#define IPPROTO_UDP             17              /* user datagram protocol */
65
#define IPPROTO_MUX             18              /* Multiplexing */
66
#define IPPROTO_MEAS            19              /* DCN Measurement Subsystems */
67
#define IPPROTO_HMP             20              /* Host Monitoring */
68
#define IPPROTO_PRM             21              /* Packet Radio Measurement */
69
#define IPPROTO_IDP             22              /* xns idp */
70
#define IPPROTO_TRUNK1          23              /* Trunk-1 */
71
#define IPPROTO_TRUNK2          24              /* Trunk-2 */
72
#define IPPROTO_LEAF1           25              /* Leaf-1 */
73
#define IPPROTO_LEAF2           26              /* Leaf-2 */
74
#define IPPROTO_RDP             27              /* Reliable Data */
75
#define IPPROTO_IRTP            28              /* Reliable Transaction */
76
#define IPPROTO_TP              29              /* tp-4 w/ class negotiation */
77
#define IPPROTO_BLT             30              /* Bulk Data Transfer */
78
#define IPPROTO_NSP             31              /* Network Services */
79
#define IPPROTO_INP             32              /* Merit Internodal */
80
#define IPPROTO_SEP             33              /* Sequential Exchange */
81
#define IPPROTO_3PC             34              /* Third Party Connect */
82
#define IPPROTO_IDPR            35              /* InterDomain Policy Routing */
83
#define IPPROTO_XTP             36              /* XTP */
84
#define IPPROTO_DDP             37              /* Datagram Delivery */
85
#define IPPROTO_CMTP            38              /* Control Message Transport */
86
#define IPPROTO_TPXX            39              /* TP++ Transport */
87
#define IPPROTO_IL              40              /* IL transport protocol */
88
#define IPPROTO_SIP             41              /* Simple Internet Protocol */
89
#define IPPROTO_SDRP            42              /* Source Demand Routing */
90
#define IPPROTO_SIPSR           43              /* SIP Source Route */
91
#define IPPROTO_SIPFRAG         44              /* SIP Fragment */
92
#define IPPROTO_IDRP            45              /* InterDomain Routing*/
93
#define IPPROTO_RSVP            46              /* resource reservation */
94
#define IPPROTO_GRE             47              /* General Routing Encap. */
95
#define IPPROTO_MHRP            48              /* Mobile Host Routing */
96
#define IPPROTO_BHA             49              /* BHA */
97
#define IPPROTO_ESP             50              /* SIPP Encap Sec. Payload */
98
#define IPPROTO_AH              51              /* SIPP Auth Header */
99
#define IPPROTO_INLSP           52              /* Integ. Net Layer Security */
100
#define IPPROTO_SWIPE           53              /* IP with encryption */
101
#define IPPROTO_NHRP            54              /* Next Hop Resolution */
102
/* 55-60: Unassigned */
103
#define IPPROTO_AHIP            61              /* any host internal protocol */
104
#define IPPROTO_CFTP            62              /* CFTP */
105
#define IPPROTO_HELLO           63              /* "hello" routing protocol */
106
#define IPPROTO_SATEXPAK        64              /* SATNET/Backroom EXPAK */
107
#define IPPROTO_KRYPTOLAN       65              /* Kryptolan */
108
#define IPPROTO_RVD             66              /* Remote Virtual Disk */
109
#define IPPROTO_IPPC            67              /* Pluribus Packet Core */
110
#define IPPROTO_ADFS            68              /* Any distributed FS */
111
#define IPPROTO_SATMON          69              /* Satnet Monitoring */
112
#define IPPROTO_VISA            70              /* VISA Protocol */
113
#define IPPROTO_IPCV            71              /* Packet Core Utility */
114
#define IPPROTO_CPNX            72              /* Comp. Prot. Net. Executive */
115
#define IPPROTO_CPHB            73              /* Comp. Prot. HeartBeat */
116
#define IPPROTO_WSN             74              /* Wang Span Network */
117
#define IPPROTO_PVP             75              /* Packet Video Protocol */
118
#define IPPROTO_BRSATMON        76              /* BackRoom SATNET Monitoring */
119
#define IPPROTO_ND              77              /* Sun net disk proto (temp.) */
120
#define IPPROTO_WBMON           78              /* WIDEBAND Monitoring */
121
#define IPPROTO_WBEXPAK         79              /* WIDEBAND EXPAK */
122
#define IPPROTO_EON             80              /* ISO cnlp */
123
#define IPPROTO_VMTP            81              /* VMTP */
124
#define IPPROTO_SVMTP           82              /* Secure VMTP */
125
#define IPPROTO_VINES           83              /* Banyon VINES */
126
#define IPPROTO_TTP             84              /* TTP */
127
#define IPPROTO_IGP             85              /* NSFNET-IGP */
128
#define IPPROTO_DGP             86              /* dissimilar gateway prot. */
129
#define IPPROTO_TCF             87              /* TCF */
130
#define IPPROTO_IGRP            88              /* Cisco/GXS IGRP */
131
#define IPPROTO_OSPFIGP         89              /* OSPFIGP */
132
#define IPPROTO_SRPC            90              /* Strite RPC protocol */
133
#define IPPROTO_LARP            91              /* Locus Address Resoloution */
134
#define IPPROTO_MTP             92              /* Multicast Transport */
135
#define IPPROTO_AX25            93              /* AX.25 Frames */
136
#define IPPROTO_IPEIP           94              /* IP encapsulated in IP */
137
#define IPPROTO_MICP            95              /* Mobile Int.ing control */
138
#define IPPROTO_SCCSP           96              /* Semaphore Comm. security */
139
#define IPPROTO_ETHERIP         97              /* Ethernet IP encapsulation */
140
#define IPPROTO_ENCAP           98              /* encapsulation header */
141
#define IPPROTO_APES            99              /* any private encr. scheme */
142
#define IPPROTO_GMTP            100             /* GMTP*/
143
/* 101-254: Unassigned */
144
/* 255: Reserved */
145
/* BSD Private, local use, namespace incursion */
146
#define IPPROTO_DIVERT          254             /* divert pseudo-protocol */
147
#define IPPROTO_RAW             255             /* raw IP packet */
148
#define IPPROTO_MAX             256
149
 
150
 
151
/*
152
 * Local port number conventions:
153
 *
154
 * When a user does a bind(2) or connect(2) with a port number of zero,
155
 * a non-conflicting local port address is chosen.
156
 * The default range is IPPORT_RESERVED through
157
 * IPPORT_USERRESERVED, although that is settable by sysctl.
158
 *
159
 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
160
 * default assignment range.
161
 *
162
 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
163
 *
164
 * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
165
 * into the "high" range.  These are reserved for client outbound connections
166
 * which do not want to be filtered by any firewalls.
167
 *
168
 * The value IP_PORTRANGE_LOW changes the range to the "low" are
169
 * that is (by convention) restricted to privileged processes.  This
170
 * convention is based on "vouchsafe" principles only.  It is only secure
171
 * if you trust the remote host to restrict these ports.
172
 *
173
 * The default range of ports and the high range can be changed by
174
 * sysctl(3).  (net.inet.ip.port{hi,low}{first,last}_auto)
175
 *
176
 * Changing those values has bad security implications if you are
177
 * using a a stateless firewall that is allowing packets outside of that
178
 * range in order to allow transparent outgoing connections.
179
 *
180
 * Such a firewall configuration will generally depend on the use of these
181
 * default values.  If you change them, you may find your Security
182
 * Administrator looking for you with a heavy object.
183
 */
184
 
185
/*
186
 * Ports < IPPORT_RESERVED are reserved for
187
 * privileged processes (e.g. root).         (IP_PORTRANGE_LOW)
188
 * Ports > IPPORT_USERRESERVED are reserved
189
 * for servers, not necessarily privileged.  (IP_PORTRANGE_DEFAULT)
190
 */
191
#define IPPORT_RESERVED         1024
192
#define IPPORT_USERRESERVED     5000
193
 
194
/*
195
 * Default local port range to use by setting IP_PORTRANGE_HIGH
196
 */
197
#define IPPORT_HIFIRSTAUTO      40000
198
#define IPPORT_HILASTAUTO       44999
199
 
200
/*
201
 * Scanning for a free reserved port return a value below IPPORT_RESERVED,
202
 * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was
203
 * 512, but that conflicts with some well-known-services that firewalls may
204
 * have a fit if we use.
205
 */
206
#define IPPORT_RESERVEDSTART    600
207
 
208
/*
209
 * Internet address (a structure for historical reasons)
210
 */
211
struct in_addr {
212
        u_long s_addr;
213
};
214
 
215
/*
216
 * Definitions of bits in internet address integers.
217
 * On subnets, the decomposition of addresses to host and net parts
218
 * is done according to subnet mask, not the masks here.
219
 */
220
#define IN_CLASSA(i)            (((long)(i) & 0x80000000) == 0)
221
#define IN_CLASSA_NET           0xff000000
222
#define IN_CLASSA_NSHIFT        24
223
#define IN_CLASSA_HOST          0x00ffffff
224
#define IN_CLASSA_MAX           128
225
 
226
#define IN_CLASSB(i)            (((long)(i) & 0xc0000000) == 0x80000000)
227
#define IN_CLASSB_NET           0xffff0000
228
#define IN_CLASSB_NSHIFT        16
229
#define IN_CLASSB_HOST          0x0000ffff
230
#define IN_CLASSB_MAX           65536
231
 
232
#define IN_CLASSC(i)            (((long)(i) & 0xe0000000) == 0xc0000000)
233
#define IN_CLASSC_NET           0xffffff00
234
#define IN_CLASSC_NSHIFT        8
235
#define IN_CLASSC_HOST          0x000000ff
236
 
237
#define IN_CLASSD(i)            (((long)(i) & 0xf0000000) == 0xe0000000)
238
#define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */
239
#define IN_CLASSD_NSHIFT        28              /* net and host fields, but */
240
#define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */
241
#define IN_MULTICAST(i)         IN_CLASSD(i)
242
 
243
#define IN_EXPERIMENTAL(i)      (((long)(i) & 0xf0000000) == 0xf0000000)
244
#define IN_BADCLASS(i)          (((long)(i) & 0xf0000000) == 0xf0000000)
245
 
246
#define INADDR_ANY              (u_long)0x00000000
247
#define INADDR_BROADCAST        (u_long)0xffffffff      /* must be masked */
248
#ifndef KERNEL
249
#define INADDR_NONE             0xffffffff              /* -1 return */
250
#endif
251
 
252
#define INADDR_UNSPEC_GROUP     (u_long)0xe0000000      /* 224.0.0.0 */
253
#define INADDR_ALLHOSTS_GROUP   (u_long)0xe0000001      /* 224.0.0.1 */
254
#define INADDR_ALLRTRS_GROUP    (u_long)0xe0000002      /* 224.0.0.2 */
255
#define INADDR_MAX_LOCAL_GROUP  (u_long)0xe00000ff      /* 224.0.0.255 */
256
 
257
#define IN_LOOPBACKNET          127                     /* official! */
258
#ifndef INADDR_LOOPBACK
259
#define INADDR_LOOPBACK         (u_long)0x7F000001      /* 127.0.0.1 */
260
#endif
261
 
262
/*
263
 * Socket address, internet style.
264
 */
265
struct sockaddr_in {
266
        u_char  sin_len;
267
        u_char  sin_family;
268
        u_short sin_port;
269
        struct  in_addr sin_addr;
270
        char    sin_zero[8];
271
};
272
 
273
/*
274
 * Structure used to describe IP options.
275
 * Used to store options internally, to pass them to a process,
276
 * or to restore options retrieved earlier.
277
 * The ip_dst is used for the first-hop gateway when using a source route
278
 * (this gets put into the header proper).
279
 */
280
struct ip_opts {
281
        struct  in_addr ip_dst;         /* first hop, 0 w/o src rt */
282
        char    ip_opts[40];            /* actually variable in size */
283
};
284
 
285
/*
286
 * Options for use with [gs]etsockopt at the IP level.
287
 * First word of comment is data type; bool is stored in int.
288
 */
289
#define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
290
#define IP_HDRINCL              2    /* int; header is included with data */
291
#define IP_TOS                  3    /* int; IP type of service and preced. */
292
#define IP_TTL                  4    /* int; IP time to live */
293
#define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
294
#define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
295
#define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
296
#define IP_RETOPTS              8    /* ip_opts; set/get IP options */
297
#define IP_MULTICAST_IF         9    /* u_char; set/get IP multicast i/f  */
298
#define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
299
#define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
300
#define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
301
#define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
302
#define IP_MULTICAST_VIF        14   /* set/get IP mcast virt. iface */
303
#define IP_RSVP_ON              15   /* enable RSVP in kernel */
304
#define IP_RSVP_OFF             16   /* disable RSVP in kernel */
305
#define IP_RSVP_VIF_ON          17   /* set RSVP per-vif socket */
306
#define IP_RSVP_VIF_OFF         18   /* unset RSVP per-vif socket */
307
#define IP_PORTRANGE            19   /* int; range to choose for unspec port */
308
#define IP_RECVIF               20   /* bool; receive reception if w/dgram */
309
 
310
#define IP_FW_ADD               50   /* add a firewall rule to chain */
311
#define IP_FW_DEL               51   /* delete a firewall rule from chain */
312
#define IP_FW_FLUSH             52   /* flush firewall rule chain */
313
#define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */
314
#define IP_FW_GET               54   /* get entire firewall rule chain */
315
#define IP_NAT                  55   /* set/get NAT opts */
316
 
317
/*
318
 * Defaults and limits for options
319
 */
320
#define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
321
#define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
322
#define IP_MAX_MEMBERSHIPS      20      /* per socket */
323
 
324
/*
325
 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
326
 */
327
struct ip_mreq {
328
        struct  in_addr imr_multiaddr;  /* IP multicast address of group */
329
        struct  in_addr imr_interface;  /* local IP address of interface */
330
};
331
 
332
/*
333
 * Argument for IP_PORTRANGE:
334
 * - which range to search when port is unspecified at bind() or connect()
335
 */
336
#define IP_PORTRANGE_DEFAULT    0        /* default range */
337
#define IP_PORTRANGE_HIGH       1       /* "high" - request firewall bypass */
338
#define IP_PORTRANGE_LOW        2       /* "low" - vouchsafe security */
339
 
340
/*
341
 * Definitions for inet sysctl operations.
342
 *
343
 * Third level is protocol number.
344
 * Fourth level is desired variable within that protocol.
345
 */
346
#define IPPROTO_MAXID   (IPPROTO_IDP + 1)       /* don't list to IPPROTO_MAX */
347
 
348
#define CTL_IPPROTO_NAMES { \
349
        { "ip", CTLTYPE_NODE }, \
350
        { "icmp", CTLTYPE_NODE }, \
351
        { "igmp", CTLTYPE_NODE }, \
352
        { "ggp", CTLTYPE_NODE }, \
353
        { 0, 0 }, \
354
        { 0, 0 }, \
355
        { "tcp", CTLTYPE_NODE }, \
356
        { 0, 0 }, \
357
        { "egp", CTLTYPE_NODE }, \
358
        { 0, 0 }, \
359
        { 0, 0 }, \
360
        { 0, 0 }, \
361
        { "pup", CTLTYPE_NODE }, \
362
        { 0, 0 }, \
363
        { 0, 0 }, \
364
        { 0, 0 }, \
365
        { 0, 0 }, \
366
        { "udp", CTLTYPE_NODE }, \
367
        { 0, 0 }, \
368
        { 0, 0 }, \
369
        { 0, 0 }, \
370
        { 0, 0 }, \
371
        { "idp", CTLTYPE_NODE }, \
372
}
373
 
374
/*
375
 * Names for IP sysctl objects
376
 */
377
#define IPCTL_FORWARDING        1       /* act as router */
378
#define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
379
#define IPCTL_DEFTTL            3       /* default TTL */
380
#ifdef notyet
381
#define IPCTL_DEFMTU            4       /* default MTU */
382
#endif
383
#define IPCTL_RTEXPIRE          5       /* cloned route expiration time */
384
#define IPCTL_RTMINEXPIRE       6       /* min value for expiration time */
385
#define IPCTL_RTMAXCACHE        7       /* trigger level for dynamic expire */
386
#define IPCTL_SOURCEROUTE       8       /* may perform source routes */
387
#define IPCTL_DIRECTEDBROADCAST 9       /* may re-broadcast received packets */
388
#define IPCTL_INTRQMAXLEN       10      /* max length of netisr queue */
389
#define IPCTL_INTRQDROPS        11      /* number of netisr q drops */
390
#define IPCTL_ACCEPTSOURCEROUTE 13      /* may accept source routed packets */
391
#define IPCTL_MAXID             13
392
 
393
#define IPCTL_NAMES { \
394
        { 0, 0 }, \
395
        { "forwarding", CTLTYPE_INT }, \
396
        { "redirect", CTLTYPE_INT }, \
397
        { "ttl", CTLTYPE_INT }, \
398
        { "mtu", CTLTYPE_INT }, \
399
        { "rtexpire", CTLTYPE_INT }, \
400
        { "rtminexpire", CTLTYPE_INT }, \
401
        { "rtmaxcache", CTLTYPE_INT }, \
402
        { "sourceroute", CTLTYPE_INT }, \
403
        { "directed-broadcast", CTLTYPE_INT }, \
404
        { "intr-queue-maxlen", CTLTYPE_INT }, \
405
        { "intr-queue-drops", CTLTYPE_INT }, \
406
        { "accept_sourceroute", CTLTYPE_INT }, \
407
}
408
 
409
 
410
#ifdef KERNEL
411
struct ifnet; struct mbuf;      /* forward declarations for Standard C */
412
 
413
int      in_broadcast __P((struct in_addr, struct ifnet *));
414
int      in_canforward __P((struct in_addr));
415
int      in_cksum __P((struct mbuf *, int));
416
int      in_localaddr __P((struct in_addr));
417
char    *inet_ntoa __P((struct in_addr)); /* in libkern */
418
 
419
/* Firewall hooks */
420
struct ip;
421
typedef int ip_fw_chk_t __P((struct ip**, int, struct ifnet*, int, struct mbuf**));
422
typedef int ip_fw_ctl_t __P((int, struct mbuf**));
423
extern  ip_fw_chk_t *ip_fw_chk_ptr;
424
extern  ip_fw_ctl_t *ip_fw_ctl_ptr;
425
 
426
/* IP NAT hooks */
427
typedef int ip_nat_t __P((struct ip**, struct mbuf**, struct ifnet*, int));
428
typedef int ip_nat_ctl_t __P((int, struct mbuf**));
429
extern  ip_nat_t *ip_nat_ptr;
430
extern  ip_nat_ctl_t *ip_nat_ctl_ptr;
431
#define IP_NAT_IN       0x00000001
432
#define IP_NAT_OUT      0x00000002
433
 
434
#endif /* KERNEL */
435
 
436
#endif

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