source: rtems/cpukit/libnetworking/netinet/in.h @ 4c92297a

4.104.114.84.9
Last change on this file since 4c92297a was 4c92297a, checked in by Ralf Corsepius <ralf.corsepius@…>, on Feb 4, 2005 at 4:35:05 PM

Misc. part. updates from FreeBSD.

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1/*
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *      @(#)in.h        8.3 (Berkeley) 1/3/94
30 * $FreeBSD: src/sys/netinet/in.h,v 1.89 2005/01/07 01:45:44 imp Exp $
31 */
32 
33/*
34 * $Id$
35 */
36
37#ifndef _NETINET_IN_H_
38#define _NETINET_IN_H_
39
40#include <machine/endian.h>
41
42/* Protocols common to RFC 1700, POSIX, and X/Open. */
43#define IPPROTO_IP              0               /* dummy for IP */
44#define IPPROTO_ICMP            1               /* control message protocol */
45#define IPPROTO_TCP             6               /* tcp */
46#define IPPROTO_UDP             17              /* user datagram protocol */
47
48/*
49 * Constants and structures defined by the internet system,
50 * Per RFC 790, September 1981, and numerous additions.
51 */
52
53/*
54 * Protocols (RFC 1700)
55 */
56#define IPPROTO_HOPOPTS         0               /* IP6 hop-by-hop options */
57#define IPPROTO_IGMP            2               /* group mgmt protocol */
58#define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
59#define IPPROTO_IPV4            4               /* IPv4 encapsulation */
60#define IPPROTO_IPIP            IPPROTO_IPV4    /* for compatibility */
61#define IPPROTO_ST              7               /* Stream protocol II */
62#define IPPROTO_EGP             8               /* exterior gateway protocol */
63#define IPPROTO_PIGP            9               /* private interior gateway */
64#define IPPROTO_RCCMON          10              /* BBN RCC Monitoring */
65#define IPPROTO_NVPII           11              /* network voice protocol*/
66#define IPPROTO_PUP             12              /* pup */
67#define IPPROTO_ARGUS           13              /* Argus */
68#define IPPROTO_EMCON           14              /* EMCON */
69#define IPPROTO_XNET            15              /* Cross Net Debugger */
70#define IPPROTO_CHAOS           16              /* Chaos*/
71#define IPPROTO_MUX             18              /* Multiplexing */
72#define IPPROTO_MEAS            19              /* DCN Measurement Subsystems */
73#define IPPROTO_HMP             20              /* Host Monitoring */
74#define IPPROTO_PRM             21              /* Packet Radio Measurement */
75#define IPPROTO_IDP             22              /* xns idp */
76#define IPPROTO_TRUNK1          23              /* Trunk-1 */
77#define IPPROTO_TRUNK2          24              /* Trunk-2 */
78#define IPPROTO_LEAF1           25              /* Leaf-1 */
79#define IPPROTO_LEAF2           26              /* Leaf-2 */
80#define IPPROTO_RDP             27              /* Reliable Data */
81#define IPPROTO_IRTP            28              /* Reliable Transaction */
82#define IPPROTO_TP              29              /* tp-4 w/ class negotiation */
83#define IPPROTO_BLT             30              /* Bulk Data Transfer */
84#define IPPROTO_NSP             31              /* Network Services */
85#define IPPROTO_INP             32              /* Merit Internodal */
86#define IPPROTO_SEP             33              /* Sequential Exchange */
87#define IPPROTO_3PC             34              /* Third Party Connect */
88#define IPPROTO_IDPR            35              /* InterDomain Policy Routing */
89#define IPPROTO_XTP             36              /* XTP */
90#define IPPROTO_DDP             37              /* Datagram Delivery */
91#define IPPROTO_CMTP            38              /* Control Message Transport */
92#define IPPROTO_TPXX            39              /* TP++ Transport */
93#define IPPROTO_IL              40              /* IL transport protocol */
94#define IPPROTO_IPV6            41              /* IP6 header */
95#define IPPROTO_SDRP            42              /* Source Demand Routing */
96#define IPPROTO_ROUTING         43              /* IP6 routing header */
97#define IPPROTO_FRAGMENT        44              /* IP6 fragmentation header */
98#define IPPROTO_IDRP            45              /* InterDomain Routing*/
99#define IPPROTO_RSVP            46              /* resource reservation */
100#define IPPROTO_GRE             47              /* General Routing Encap. */
101#define IPPROTO_MHRP            48              /* Mobile Host Routing */
102#define IPPROTO_BHA             49              /* BHA */
103#define IPPROTO_ESP             50              /* IP6 Encap Sec. Payload */
104#define IPPROTO_AH              51              /* IP6 Auth Header */
105#define IPPROTO_INLSP           52              /* Integ. Net Layer Security */
106#define IPPROTO_SWIPE           53              /* IP with encryption */
107#define IPPROTO_NHRP            54              /* Next Hop Resolution */
108#define IPPROTO_MOBILE          55              /* IP Mobility */
109#define IPPROTO_TLSP            56              /* Transport Layer Security */
110#define IPPROTO_SKIP            57              /* SKIP */
111#define IPPROTO_ICMPV6          58              /* ICMP6 */
112#define IPPROTO_NONE            59              /* IP6 no next header */
113#define IPPROTO_DSTOPTS         60              /* IP6 destination option */
114#define IPPROTO_AHIP            61              /* any host internal protocol */
115#define IPPROTO_CFTP            62              /* CFTP */
116#define IPPROTO_HELLO           63              /* "hello" routing protocol */
117#define IPPROTO_SATEXPAK        64              /* SATNET/Backroom EXPAK */
118#define IPPROTO_KRYPTOLAN       65              /* Kryptolan */
119#define IPPROTO_RVD             66              /* Remote Virtual Disk */
120#define IPPROTO_IPPC            67              /* Pluribus Packet Core */
121#define IPPROTO_ADFS            68              /* Any distributed FS */
122#define IPPROTO_SATMON          69              /* Satnet Monitoring */
123#define IPPROTO_VISA            70              /* VISA Protocol */
124#define IPPROTO_IPCV            71              /* Packet Core Utility */
125#define IPPROTO_CPNX            72              /* Comp. Prot. Net. Executive */
126#define IPPROTO_CPHB            73              /* Comp. Prot. HeartBeat */
127#define IPPROTO_WSN             74              /* Wang Span Network */
128#define IPPROTO_PVP             75              /* Packet Video Protocol */
129#define IPPROTO_BRSATMON        76              /* BackRoom SATNET Monitoring */
130#define IPPROTO_ND              77              /* Sun net disk proto (temp.) */
131#define IPPROTO_WBMON           78              /* WIDEBAND Monitoring */
132#define IPPROTO_WBEXPAK         79              /* WIDEBAND EXPAK */
133#define IPPROTO_EON             80              /* ISO cnlp */
134#define IPPROTO_VMTP            81              /* VMTP */
135#define IPPROTO_SVMTP           82              /* Secure VMTP */
136#define IPPROTO_VINES           83              /* Banyon VINES */
137#define IPPROTO_TTP             84              /* TTP */
138#define IPPROTO_IGP             85              /* NSFNET-IGP */
139#define IPPROTO_DGP             86              /* dissimilar gateway prot. */
140#define IPPROTO_TCF             87              /* TCF */
141#define IPPROTO_IGRP            88              /* Cisco/GXS IGRP */
142#define IPPROTO_OSPFIGP         89              /* OSPFIGP */
143#define IPPROTO_SRPC            90              /* Strite RPC protocol */
144#define IPPROTO_LARP            91              /* Locus Address Resoloution */
145#define IPPROTO_MTP             92              /* Multicast Transport */
146#define IPPROTO_AX25            93              /* AX.25 Frames */
147#define IPPROTO_IPEIP           94              /* IP encapsulated in IP */
148#define IPPROTO_MICP            95              /* Mobile Int.ing control */
149#define IPPROTO_SCCSP           96              /* Semaphore Comm. security */
150#define IPPROTO_ETHERIP         97              /* Ethernet IP encapsulation */
151#define IPPROTO_ENCAP           98              /* encapsulation header */
152#define IPPROTO_APES            99              /* any private encr. scheme */
153#define IPPROTO_GMTP            100             /* GMTP*/
154/* 101-254: Unassigned */
155/* 255: Reserved */
156/* BSD Private, local use, namespace incursion */
157#define IPPROTO_DIVERT          254             /* divert pseudo-protocol */
158#define IPPROTO_RAW             255             /* raw IP packet */
159#define IPPROTO_MAX             256
160
161/*
162 * Merged from FreeBSD 1.78 of this file so Python compiles.
163 * This is a size value for functions such as inet_ntop().
164 */
165#define INET_ADDRSTRLEN         16
166
167/*
168 * Local port number conventions:
169 *
170 * When a user does a bind(2) or connect(2) with a port number of zero,
171 * a non-conflicting local port address is chosen.
172 * The default range is IPPORT_RESERVED through
173 * IPPORT_USERRESERVED, although that is settable by sysctl.
174 *
175 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
176 * default assignment range.
177 *
178 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
179 *
180 * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
181 * into the "high" range.  These are reserved for client outbound connections
182 * which do not want to be filtered by any firewalls.  Note that by default
183 * this is the same as IP_PORTRANGE_DEFAULT.
184 *
185 * The value IP_PORTRANGE_LOW changes the range to the "low" are
186 * that is (by convention) restricted to privileged processes.  This
187 * convention is based on "vouchsafe" principles only.  It is only secure
188 * if you trust the remote host to restrict these ports.
189 *
190 * The default range of ports and the high range can be changed by
191 * sysctl(3).  (net.inet.ip.port{hi,low}{first,last}_auto)
192 *
193 * Changing those values has bad security implications if you are
194 * using a a stateless firewall that is allowing packets outside of that
195 * range in order to allow transparent outgoing connections.
196 *
197 * Such a firewall configuration will generally depend on the use of these
198 * default values.  If you change them, you may find your Security
199 * Administrator looking for you with a heavy object.
200 */
201
202/*
203 * Ports < IPPORT_RESERVED are reserved for
204 * privileged processes (e.g. root).         (IP_PORTRANGE_LOW)
205 * Ports > IPPORT_USERRESERVED are reserved
206 * for servers, not necessarily privileged.  (IP_PORTRANGE_DEFAULT)
207 */
208#define IPPORT_RESERVED         1024
209#define IPPORT_USERRESERVED     5000
210
211/*
212 * Default local port range to use by setting IP_PORTRANGE_HIGH
213 */
214#define IPPORT_HIFIRSTAUTO      40000
215#define IPPORT_HILASTAUTO       44999
216
217/*
218 * Scanning for a free reserved port return a value below IPPORT_RESERVED,
219 * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was
220 * 512, but that conflicts with some well-known-services that firewalls may
221 * have a fit if we use.
222 */
223#define IPPORT_RESERVEDSTART    600
224#define BYTE_PACK __attribute__((packed))
225/*
226 * Internet address (a structure for historical reasons)
227 */
228struct in_addr {
229        u_long s_addr BYTE_PACK;
230};
231
232/*
233 * Definitions of bits in internet address integers.
234 * On subnets, the decomposition of addresses to host and net parts
235 * is done according to subnet mask, not the masks here.
236 */
237#define IN_CLASSA(i)            (((long)(i) & 0x80000000) == 0)
238#define IN_CLASSA_NET           0xff000000
239#define IN_CLASSA_NSHIFT        24
240#define IN_CLASSA_HOST          0x00ffffff
241#define IN_CLASSA_MAX           128
242
243#define IN_CLASSB(i)            (((long)(i) & 0xc0000000) == 0x80000000)
244#define IN_CLASSB_NET           0xffff0000
245#define IN_CLASSB_NSHIFT        16
246#define IN_CLASSB_HOST          0x0000ffff
247#define IN_CLASSB_MAX           65536
248
249#define IN_CLASSC(i)            (((long)(i) & 0xe0000000) == 0xc0000000)
250#define IN_CLASSC_NET           0xffffff00
251#define IN_CLASSC_NSHIFT        8
252#define IN_CLASSC_HOST          0x000000ff
253
254#define IN_CLASSD(i)            (((long)(i) & 0xf0000000) == 0xe0000000)
255#define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */
256#define IN_CLASSD_NSHIFT        28              /* net and host fields, but */
257#define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */
258#define IN_MULTICAST(i)         IN_CLASSD(i)
259
260#define IN_EXPERIMENTAL(i)      (((long)(i) & 0xf0000000) == 0xf0000000)
261#define IN_BADCLASS(i)          (((long)(i) & 0xf0000000) == 0xf0000000)
262
263#define INADDR_ANY              (u_long)0x00000000
264#define INADDR_BROADCAST        (u_long)0xffffffff      /* must be masked */
265#ifndef _KERNEL
266#define INADDR_NONE             0xffffffff              /* -1 return */
267#endif
268
269#define INADDR_UNSPEC_GROUP     (u_long)0xe0000000      /* 224.0.0.0 */
270#define INADDR_ALLHOSTS_GROUP   (u_long)0xe0000001      /* 224.0.0.1 */
271#define INADDR_ALLRTRS_GROUP    (u_long)0xe0000002      /* 224.0.0.2 */
272#define INADDR_MAX_LOCAL_GROUP  (u_long)0xe00000ff      /* 224.0.0.255 */
273
274#define IN_LOOPBACKNET          127                     /* official! */
275#ifndef INADDR_LOOPBACK
276#define INADDR_LOOPBACK         (u_long)0x7F000001      /* 127.0.0.1 */
277#endif
278
279/*
280 * Socket address, internet style.
281 */
282struct sockaddr_in {
283        u_char  sin_len;
284        u_char  sin_family;
285        u_short sin_port;
286        struct  in_addr sin_addr;
287        char    sin_zero[8];
288};
289
290/*
291 * Structure used to describe IP options.
292 * Used to store options internally, to pass them to a process,
293 * or to restore options retrieved earlier.
294 * The ip_dst is used for the first-hop gateway when using a source route
295 * (this gets put into the header proper).
296 */
297struct ip_opts {
298        struct  in_addr ip_dst;         /* first hop, 0 w/o src rt */
299        char    ip_opts[40];            /* actually variable in size */
300};
301
302/*
303 * Options for use with [gs]etsockopt at the IP level.
304 * First word of comment is data type; bool is stored in int.
305 */
306#define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
307#define IP_HDRINCL              2    /* int; header is included with data */
308#define IP_TOS                  3    /* int; IP type of service and preced. */
309#define IP_TTL                  4    /* int; IP time to live */
310#define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
311#define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
312#define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
313#define IP_SENDSRCADDR          IP_RECVDSTADDR /* cmsg_type to set src addr */
314#define IP_RETOPTS              8    /* ip_opts; set/get IP options */
315#define IP_MULTICAST_IF         9    /* u_char; set/get IP multicast i/f  */
316#define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
317#define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
318#define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
319#define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
320#define IP_MULTICAST_VIF        14   /* set/get IP mcast virt. iface */
321#define IP_RSVP_ON              15   /* enable RSVP in kernel */
322#define IP_RSVP_OFF             16   /* disable RSVP in kernel */
323#define IP_RSVP_VIF_ON          17   /* set RSVP per-vif socket */
324#define IP_RSVP_VIF_OFF         18   /* unset RSVP per-vif socket */
325#define IP_PORTRANGE            19   /* int; range to choose for unspec port */
326#define IP_RECVIF               20   /* bool; receive reception if w/dgram */
327
328#define IP_FW_ADD               50   /* add a firewall rule to chain */
329#define IP_FW_DEL               51   /* delete a firewall rule from chain */
330#define IP_FW_FLUSH             52   /* flush firewall rule chain */
331#define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */
332#define IP_FW_GET               54   /* get entire firewall rule chain */
333#define IP_NAT                  55   /* set/get NAT opts */
334
335/*
336 * Defaults and limits for options
337 */
338#define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
339#define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
340#define IP_MAX_MEMBERSHIPS      20      /* per socket */
341
342/*
343 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
344 */
345struct ip_mreq {
346        struct  in_addr imr_multiaddr;  /* IP multicast address of group */
347        struct  in_addr imr_interface;  /* local IP address of interface */
348};
349
350/*
351 * Argument for IP_PORTRANGE:
352 * - which range to search when port is unspecified at bind() or connect()
353 */
354#define IP_PORTRANGE_DEFAULT    0       /* default range */
355#define IP_PORTRANGE_HIGH       1       /* "high" - request firewall bypass */
356#define IP_PORTRANGE_LOW        2       /* "low" - vouchsafe security */
357
358/*
359 * Definitions for inet sysctl operations.
360 *
361 * Third level is protocol number.
362 * Fourth level is desired variable within that protocol.
363 */
364#define IPPROTO_MAXID   (IPPROTO_IDP + 1)       /* don't list to IPPROTO_MAX */
365
366#define CTL_IPPROTO_NAMES { \
367        { "ip", CTLTYPE_NODE }, \
368        { "icmp", CTLTYPE_NODE }, \
369        { "igmp", CTLTYPE_NODE }, \
370        { "ggp", CTLTYPE_NODE }, \
371        { 0, 0 }, \
372        { 0, 0 }, \
373        { "tcp", CTLTYPE_NODE }, \
374        { 0, 0 }, \
375        { "egp", CTLTYPE_NODE }, \
376        { 0, 0 }, \
377        { 0, 0 }, \
378        { 0, 0 }, \
379        { "pup", CTLTYPE_NODE }, \
380        { 0, 0 }, \
381        { 0, 0 }, \
382        { 0, 0 }, \
383        { 0, 0 }, \
384        { "udp", CTLTYPE_NODE }, \
385        { 0, 0 }, \
386        { 0, 0 }, \
387        { 0, 0 }, \
388        { 0, 0 }, \
389        { "idp", CTLTYPE_NODE }, \
390}
391
392/*
393 * Names for IP sysctl objects
394 */
395#define IPCTL_FORWARDING        1       /* act as router */
396#define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
397#define IPCTL_DEFTTL            3       /* default TTL */
398#ifdef notyet
399#define IPCTL_DEFMTU            4       /* default MTU */
400#endif
401#define IPCTL_RTEXPIRE          5       /* cloned route expiration time */
402#define IPCTL_RTMINEXPIRE       6       /* min value for expiration time */
403#define IPCTL_RTMAXCACHE        7       /* trigger level for dynamic expire */
404#define IPCTL_SOURCEROUTE       8       /* may perform source routes */
405#define IPCTL_DIRECTEDBROADCAST 9       /* may re-broadcast received packets */
406#define IPCTL_INTRQMAXLEN       10      /* max length of netisr queue */
407#define IPCTL_INTRQDROPS        11      /* number of netisr q drops */
408#define IPCTL_ACCEPTSOURCEROUTE 13      /* may accept source routed packets */
409#define IPCTL_MAXID             13
410
411#define IPCTL_NAMES { \
412        { 0, 0 }, \
413        { "forwarding", CTLTYPE_INT }, \
414        { "redirect", CTLTYPE_INT }, \
415        { "ttl", CTLTYPE_INT }, \
416        { "mtu", CTLTYPE_INT }, \
417        { "rtexpire", CTLTYPE_INT }, \
418        { "rtminexpire", CTLTYPE_INT }, \
419        { "rtmaxcache", CTLTYPE_INT }, \
420        { "sourceroute", CTLTYPE_INT }, \
421        { "directed-broadcast", CTLTYPE_INT }, \
422        { "intr-queue-maxlen", CTLTYPE_INT }, \
423        { "intr-queue-drops", CTLTYPE_INT }, \
424        { "accept_sourceroute", CTLTYPE_INT }, \
425}
426
427
428#ifdef _KERNEL
429struct ifnet; struct mbuf;      /* forward declarations for Standard C */
430
431int      in_broadcast __P((struct in_addr, struct ifnet *));
432int      in_canforward __P((struct in_addr));
433int      in_cksum __P((struct mbuf *, int));
434int      in_localaddr __P((struct in_addr));
435char    *inet_ntoa __P((struct in_addr)); /* in libkern */
436
437/* Firewall hooks */
438struct ip;
439typedef int ip_fw_chk_t __P((struct ip**, int, struct ifnet*, int, struct mbuf**));
440typedef int ip_fw_ctl_t __P((int, struct mbuf**));
441extern  ip_fw_chk_t *ip_fw_chk_ptr;
442extern  ip_fw_ctl_t *ip_fw_ctl_ptr;
443
444/* IP NAT hooks */
445typedef int ip_nat_t __P((struct ip**, struct mbuf**, struct ifnet*, int));
446typedef int ip_nat_ctl_t __P((int, struct mbuf**));
447extern  ip_nat_t *ip_nat_ptr;
448extern  ip_nat_ctl_t *ip_nat_ctl_ptr;
449#define IP_NAT_IN       0x00000001
450#define IP_NAT_OUT      0x00000002
451
452#endif /* _KERNEL */
453
454#endif /* !_NETINET_IN_H_*/
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