source: rtems/cpukit/libnetworking/netinet/in.h @ 7a47bb5

4.104.114.84.95
Last change on this file since 7a47bb5 was 7a47bb5, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 7, 2002 at 3:37:33 PM

2002-08-07 Joel Sherrill <joel@…>

  • netinet/in.h: Per PR263, added include of <machine/endian.h> to <netinet/in.h> so it includes prototypes of ntohl() family of routines.
  • Property mode set to 100644
File size: 16.6 KB
Line 
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 * 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 * $Id$
35 */
36
37#ifndef _NETINET_IN_H_
38#define _NETINET_IN_H_
39
40#include <machine/endian.h>  /* for ntohx routines */
41
42/*
43 * Constants and structures defined by the internet system,
44 * Per RFC 790, September 1981, and numerous additions.
45 */
46
47/*
48 * Protocols (RFC 1700)
49 */
50#define IPPROTO_IP              0               /* dummy for IP */
51#define IPPROTO_ICMP            1               /* control message protocol */
52#define IPPROTO_IGMP            2               /* group mgmt protocol */
53#define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
54#define IPPROTO_IPIP            4               /* IP encapsulation in IP */
55#define IPPROTO_TCP             6               /* tcp */
56#define IPPROTO_ST              7               /* Stream protocol II */
57#define IPPROTO_EGP             8               /* exterior gateway protocol */
58#define IPPROTO_PIGP            9               /* private interior gateway */
59#define IPPROTO_RCCMON          10              /* BBN RCC Monitoring */
60#define IPPROTO_NVPII           11              /* network voice protocol*/
61#define IPPROTO_PUP             12              /* pup */
62#define IPPROTO_ARGUS           13              /* Argus */
63#define IPPROTO_EMCON           14              /* EMCON */
64#define IPPROTO_XNET            15              /* Cross Net Debugger */
65#define IPPROTO_CHAOS           16              /* Chaos*/
66#define IPPROTO_UDP             17              /* user datagram protocol */
67#define IPPROTO_MUX             18              /* Multiplexing */
68#define IPPROTO_MEAS            19              /* DCN Measurement Subsystems */
69#define IPPROTO_HMP             20              /* Host Monitoring */
70#define IPPROTO_PRM             21              /* Packet Radio Measurement */
71#define IPPROTO_IDP             22              /* xns idp */
72#define IPPROTO_TRUNK1          23              /* Trunk-1 */
73#define IPPROTO_TRUNK2          24              /* Trunk-2 */
74#define IPPROTO_LEAF1           25              /* Leaf-1 */
75#define IPPROTO_LEAF2           26              /* Leaf-2 */
76#define IPPROTO_RDP             27              /* Reliable Data */
77#define IPPROTO_IRTP            28              /* Reliable Transaction */
78#define IPPROTO_TP              29              /* tp-4 w/ class negotiation */
79#define IPPROTO_BLT             30              /* Bulk Data Transfer */
80#define IPPROTO_NSP             31              /* Network Services */
81#define IPPROTO_INP             32              /* Merit Internodal */
82#define IPPROTO_SEP             33              /* Sequential Exchange */
83#define IPPROTO_3PC             34              /* Third Party Connect */
84#define IPPROTO_IDPR            35              /* InterDomain Policy Routing */
85#define IPPROTO_XTP             36              /* XTP */
86#define IPPROTO_DDP             37              /* Datagram Delivery */
87#define IPPROTO_CMTP            38              /* Control Message Transport */
88#define IPPROTO_TPXX            39              /* TP++ Transport */
89#define IPPROTO_IL              40              /* IL transport protocol */
90#define IPPROTO_SIP             41              /* Simple Internet Protocol */
91#define IPPROTO_SDRP            42              /* Source Demand Routing */
92#define IPPROTO_SIPSR           43              /* SIP Source Route */
93#define IPPROTO_SIPFRAG         44              /* SIP Fragment */
94#define IPPROTO_IDRP            45              /* InterDomain Routing*/
95#define IPPROTO_RSVP            46              /* resource reservation */
96#define IPPROTO_GRE             47              /* General Routing Encap. */
97#define IPPROTO_MHRP            48              /* Mobile Host Routing */
98#define IPPROTO_BHA             49              /* BHA */
99#define IPPROTO_ESP             50              /* SIPP Encap Sec. Payload */
100#define IPPROTO_AH              51              /* SIPP Auth Header */
101#define IPPROTO_INLSP           52              /* Integ. Net Layer Security */
102#define IPPROTO_SWIPE           53              /* IP with encryption */
103#define IPPROTO_NHRP            54              /* Next Hop Resolution */
104/* 55-60: Unassigned */
105#define IPPROTO_AHIP            61              /* any host internal protocol */
106#define IPPROTO_CFTP            62              /* CFTP */
107#define IPPROTO_HELLO           63              /* "hello" routing protocol */
108#define IPPROTO_SATEXPAK        64              /* SATNET/Backroom EXPAK */
109#define IPPROTO_KRYPTOLAN       65              /* Kryptolan */
110#define IPPROTO_RVD             66              /* Remote Virtual Disk */
111#define IPPROTO_IPPC            67              /* Pluribus Packet Core */
112#define IPPROTO_ADFS            68              /* Any distributed FS */
113#define IPPROTO_SATMON          69              /* Satnet Monitoring */
114#define IPPROTO_VISA            70              /* VISA Protocol */
115#define IPPROTO_IPCV            71              /* Packet Core Utility */
116#define IPPROTO_CPNX            72              /* Comp. Prot. Net. Executive */
117#define IPPROTO_CPHB            73              /* Comp. Prot. HeartBeat */
118#define IPPROTO_WSN             74              /* Wang Span Network */
119#define IPPROTO_PVP             75              /* Packet Video Protocol */
120#define IPPROTO_BRSATMON        76              /* BackRoom SATNET Monitoring */
121#define IPPROTO_ND              77              /* Sun net disk proto (temp.) */
122#define IPPROTO_WBMON           78              /* WIDEBAND Monitoring */
123#define IPPROTO_WBEXPAK         79              /* WIDEBAND EXPAK */
124#define IPPROTO_EON             80              /* ISO cnlp */
125#define IPPROTO_VMTP            81              /* VMTP */
126#define IPPROTO_SVMTP           82              /* Secure VMTP */
127#define IPPROTO_VINES           83              /* Banyon VINES */
128#define IPPROTO_TTP             84              /* TTP */
129#define IPPROTO_IGP             85              /* NSFNET-IGP */
130#define IPPROTO_DGP             86              /* dissimilar gateway prot. */
131#define IPPROTO_TCF             87              /* TCF */
132#define IPPROTO_IGRP            88              /* Cisco/GXS IGRP */
133#define IPPROTO_OSPFIGP         89              /* OSPFIGP */
134#define IPPROTO_SRPC            90              /* Strite RPC protocol */
135#define IPPROTO_LARP            91              /* Locus Address Resoloution */
136#define IPPROTO_MTP             92              /* Multicast Transport */
137#define IPPROTO_AX25            93              /* AX.25 Frames */
138#define IPPROTO_IPEIP           94              /* IP encapsulated in IP */
139#define IPPROTO_MICP            95              /* Mobile Int.ing control */
140#define IPPROTO_SCCSP           96              /* Semaphore Comm. security */
141#define IPPROTO_ETHERIP         97              /* Ethernet IP encapsulation */
142#define IPPROTO_ENCAP           98              /* encapsulation header */
143#define IPPROTO_APES            99              /* any private encr. scheme */
144#define IPPROTO_GMTP            100             /* GMTP*/
145/* 101-254: Unassigned */
146/* 255: Reserved */
147/* BSD Private, local use, namespace incursion */
148#define IPPROTO_DIVERT          254             /* divert pseudo-protocol */
149#define IPPROTO_RAW             255             /* raw IP packet */
150#define IPPROTO_MAX             256
151
152
153/*
154 * Local port number conventions:
155 *
156 * When a user does a bind(2) or connect(2) with a port number of zero,
157 * a non-conflicting local port address is chosen.
158 * The default range is IPPORT_RESERVED through
159 * IPPORT_USERRESERVED, although that is settable by sysctl.
160 *
161 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
162 * default assignment range.
163 *
164 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
165 *
166 * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
167 * into the "high" range.  These are reserved for client outbound connections
168 * which do not want to be filtered by any firewalls.
169 *
170 * The value IP_PORTRANGE_LOW changes the range to the "low" are
171 * that is (by convention) restricted to privileged processes.  This
172 * convention is based on "vouchsafe" principles only.  It is only secure
173 * if you trust the remote host to restrict these ports.
174 *
175 * The default range of ports and the high range can be changed by
176 * sysctl(3).  (net.inet.ip.port{hi,low}{first,last}_auto)
177 *
178 * Changing those values has bad security implications if you are
179 * using a a stateless firewall that is allowing packets outside of that
180 * range in order to allow transparent outgoing connections.
181 *
182 * Such a firewall configuration will generally depend on the use of these
183 * default values.  If you change them, you may find your Security
184 * Administrator looking for you with a heavy object.
185 */
186
187/*
188 * Ports < IPPORT_RESERVED are reserved for
189 * privileged processes (e.g. root).         (IP_PORTRANGE_LOW)
190 * Ports > IPPORT_USERRESERVED are reserved
191 * for servers, not necessarily privileged.  (IP_PORTRANGE_DEFAULT)
192 */
193#define IPPORT_RESERVED         1024
194#define IPPORT_USERRESERVED     5000
195
196/*
197 * Default local port range to use by setting IP_PORTRANGE_HIGH
198 */
199#define IPPORT_HIFIRSTAUTO      40000
200#define IPPORT_HILASTAUTO       44999
201
202/*
203 * Scanning for a free reserved port return a value below IPPORT_RESERVED,
204 * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was
205 * 512, but that conflicts with some well-known-services that firewalls may
206 * have a fit if we use.
207 */
208#define IPPORT_RESERVEDSTART    600
209#define BYTE_PACK __attribute__((packed))
210/*
211 * Internet address (a structure for historical reasons)
212 */
213struct in_addr {
214        u_long s_addr BYTE_PACK;
215};
216
217/*
218 * Definitions of bits in internet address integers.
219 * On subnets, the decomposition of addresses to host and net parts
220 * is done according to subnet mask, not the masks here.
221 */
222#define IN_CLASSA(i)            (((long)(i) & 0x80000000) == 0)
223#define IN_CLASSA_NET           0xff000000
224#define IN_CLASSA_NSHIFT        24
225#define IN_CLASSA_HOST          0x00ffffff
226#define IN_CLASSA_MAX           128
227
228#define IN_CLASSB(i)            (((long)(i) & 0xc0000000) == 0x80000000)
229#define IN_CLASSB_NET           0xffff0000
230#define IN_CLASSB_NSHIFT        16
231#define IN_CLASSB_HOST          0x0000ffff
232#define IN_CLASSB_MAX           65536
233
234#define IN_CLASSC(i)            (((long)(i) & 0xe0000000) == 0xc0000000)
235#define IN_CLASSC_NET           0xffffff00
236#define IN_CLASSC_NSHIFT        8
237#define IN_CLASSC_HOST          0x000000ff
238
239#define IN_CLASSD(i)            (((long)(i) & 0xf0000000) == 0xe0000000)
240#define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */
241#define IN_CLASSD_NSHIFT        28              /* net and host fields, but */
242#define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */
243#define IN_MULTICAST(i)         IN_CLASSD(i)
244
245#define IN_EXPERIMENTAL(i)      (((long)(i) & 0xf0000000) == 0xf0000000)
246#define IN_BADCLASS(i)          (((long)(i) & 0xf0000000) == 0xf0000000)
247
248#define INADDR_ANY              (u_long)0x00000000
249#define INADDR_BROADCAST        (u_long)0xffffffff      /* must be masked */
250#ifndef KERNEL
251#define INADDR_NONE             0xffffffff              /* -1 return */
252#endif
253
254#define INADDR_UNSPEC_GROUP     (u_long)0xe0000000      /* 224.0.0.0 */
255#define INADDR_ALLHOSTS_GROUP   (u_long)0xe0000001      /* 224.0.0.1 */
256#define INADDR_ALLRTRS_GROUP    (u_long)0xe0000002      /* 224.0.0.2 */
257#define INADDR_MAX_LOCAL_GROUP  (u_long)0xe00000ff      /* 224.0.0.255 */
258
259#define IN_LOOPBACKNET          127                     /* official! */
260#ifndef INADDR_LOOPBACK
261#define INADDR_LOOPBACK         (u_long)0x7F000001      /* 127.0.0.1 */
262#endif
263
264/*
265 * Socket address, internet style.
266 */
267struct sockaddr_in {
268        u_char  sin_len;
269        u_char  sin_family;
270        u_short sin_port;
271        struct  in_addr sin_addr;
272        char    sin_zero[8];
273};
274
275/*
276 * Structure used to describe IP options.
277 * Used to store options internally, to pass them to a process,
278 * or to restore options retrieved earlier.
279 * The ip_dst is used for the first-hop gateway when using a source route
280 * (this gets put into the header proper).
281 */
282struct ip_opts {
283        struct  in_addr ip_dst;         /* first hop, 0 w/o src rt */
284        char    ip_opts[40];            /* actually variable in size */
285};
286
287/*
288 * Options for use with [gs]etsockopt at the IP level.
289 * First word of comment is data type; bool is stored in int.
290 */
291#define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
292#define IP_HDRINCL              2    /* int; header is included with data */
293#define IP_TOS                  3    /* int; IP type of service and preced. */
294#define IP_TTL                  4    /* int; IP time to live */
295#define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
296#define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
297#define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
298#define IP_RETOPTS              8    /* ip_opts; set/get IP options */
299#define IP_MULTICAST_IF         9    /* u_char; set/get IP multicast i/f  */
300#define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
301#define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
302#define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
303#define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
304#define IP_MULTICAST_VIF        14   /* set/get IP mcast virt. iface */
305#define IP_RSVP_ON              15   /* enable RSVP in kernel */
306#define IP_RSVP_OFF             16   /* disable RSVP in kernel */
307#define IP_RSVP_VIF_ON          17   /* set RSVP per-vif socket */
308#define IP_RSVP_VIF_OFF         18   /* unset RSVP per-vif socket */
309#define IP_PORTRANGE            19   /* int; range to choose for unspec port */
310#define IP_RECVIF               20   /* bool; receive reception if w/dgram */
311
312#define IP_FW_ADD               50   /* add a firewall rule to chain */
313#define IP_FW_DEL               51   /* delete a firewall rule from chain */
314#define IP_FW_FLUSH             52   /* flush firewall rule chain */
315#define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */
316#define IP_FW_GET               54   /* get entire firewall rule chain */
317#define IP_NAT                  55   /* set/get NAT opts */
318
319/*
320 * Defaults and limits for options
321 */
322#define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
323#define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
324#define IP_MAX_MEMBERSHIPS      20      /* per socket */
325
326/*
327 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
328 */
329struct ip_mreq {
330        struct  in_addr imr_multiaddr;  /* IP multicast address of group */
331        struct  in_addr imr_interface;  /* local IP address of interface */
332};
333
334/*
335 * Argument for IP_PORTRANGE:
336 * - which range to search when port is unspecified at bind() or connect()
337 */
338#define IP_PORTRANGE_DEFAULT    0       /* default range */
339#define IP_PORTRANGE_HIGH       1       /* "high" - request firewall bypass */
340#define IP_PORTRANGE_LOW        2       /* "low" - vouchsafe security */
341
342/*
343 * Definitions for inet sysctl operations.
344 *
345 * Third level is protocol number.
346 * Fourth level is desired variable within that protocol.
347 */
348#define IPPROTO_MAXID   (IPPROTO_IDP + 1)       /* don't list to IPPROTO_MAX */
349
350#define CTL_IPPROTO_NAMES { \
351        { "ip", CTLTYPE_NODE }, \
352        { "icmp", CTLTYPE_NODE }, \
353        { "igmp", CTLTYPE_NODE }, \
354        { "ggp", CTLTYPE_NODE }, \
355        { 0, 0 }, \
356        { 0, 0 }, \
357        { "tcp", CTLTYPE_NODE }, \
358        { 0, 0 }, \
359        { "egp", CTLTYPE_NODE }, \
360        { 0, 0 }, \
361        { 0, 0 }, \
362        { 0, 0 }, \
363        { "pup", CTLTYPE_NODE }, \
364        { 0, 0 }, \
365        { 0, 0 }, \
366        { 0, 0 }, \
367        { 0, 0 }, \
368        { "udp", CTLTYPE_NODE }, \
369        { 0, 0 }, \
370        { 0, 0 }, \
371        { 0, 0 }, \
372        { 0, 0 }, \
373        { "idp", CTLTYPE_NODE }, \
374}
375
376/*
377 * Names for IP sysctl objects
378 */
379#define IPCTL_FORWARDING        1       /* act as router */
380#define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
381#define IPCTL_DEFTTL            3       /* default TTL */
382#ifdef notyet
383#define IPCTL_DEFMTU            4       /* default MTU */
384#endif
385#define IPCTL_RTEXPIRE          5       /* cloned route expiration time */
386#define IPCTL_RTMINEXPIRE       6       /* min value for expiration time */
387#define IPCTL_RTMAXCACHE        7       /* trigger level for dynamic expire */
388#define IPCTL_SOURCEROUTE       8       /* may perform source routes */
389#define IPCTL_DIRECTEDBROADCAST 9       /* may re-broadcast received packets */
390#define IPCTL_INTRQMAXLEN       10      /* max length of netisr queue */
391#define IPCTL_INTRQDROPS        11      /* number of netisr q drops */
392#define IPCTL_ACCEPTSOURCEROUTE 13      /* may accept source routed packets */
393#define IPCTL_MAXID             13
394
395#define IPCTL_NAMES { \
396        { 0, 0 }, \
397        { "forwarding", CTLTYPE_INT }, \
398        { "redirect", CTLTYPE_INT }, \
399        { "ttl", CTLTYPE_INT }, \
400        { "mtu", CTLTYPE_INT }, \
401        { "rtexpire", CTLTYPE_INT }, \
402        { "rtminexpire", CTLTYPE_INT }, \
403        { "rtmaxcache", CTLTYPE_INT }, \
404        { "sourceroute", CTLTYPE_INT }, \
405        { "directed-broadcast", CTLTYPE_INT }, \
406        { "intr-queue-maxlen", CTLTYPE_INT }, \
407        { "intr-queue-drops", CTLTYPE_INT }, \
408        { "accept_sourceroute", CTLTYPE_INT }, \
409}
410
411
412#ifdef KERNEL
413struct ifnet; struct mbuf;      /* forward declarations for Standard C */
414
415int      in_broadcast __P((struct in_addr, struct ifnet *));
416int      in_canforward __P((struct in_addr));
417int      in_cksum __P((struct mbuf *, int));
418int      in_localaddr __P((struct in_addr));
419char    *inet_ntoa __P((struct in_addr)); /* in libkern */
420
421/* Firewall hooks */
422struct ip;
423typedef int ip_fw_chk_t __P((struct ip**, int, struct ifnet*, int, struct mbuf**));
424typedef int ip_fw_ctl_t __P((int, struct mbuf**));
425extern  ip_fw_chk_t *ip_fw_chk_ptr;
426extern  ip_fw_ctl_t *ip_fw_ctl_ptr;
427
428/* IP NAT hooks */
429typedef int ip_nat_t __P((struct ip**, struct mbuf**, struct ifnet*, int));
430typedef int ip_nat_ctl_t __P((int, struct mbuf**));
431extern  ip_nat_t *ip_nat_ptr;
432extern  ip_nat_ctl_t *ip_nat_ctl_ptr;
433#define IP_NAT_IN       0x00000001
434#define IP_NAT_OUT      0x00000002
435
436#endif /* KERNEL */
437
438#endif
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