Annotation of embedaddon/pimd/include/freebsd2/netinet/in.h, revision 1.1.1.1
1.1 misho 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: in.h,v 1.22.2.1 1996/11/11 23:40:37 phk 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
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_EGP 8 /* exterior gateway protocol */
55: #define IPPROTO_PUP 12 /* pup */
56: #define IPPROTO_UDP 17 /* user datagram protocol */
57: #define IPPROTO_IDP 22 /* xns idp */
58: #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
59: #define IPPROTO_RSVP 46 /* resource reservation */
60: #define IPPROTO_EON 80 /* ISO cnlp */
61: #define IPPROTO_ENCAP 98 /* encapsulation header */
62: #define IPPROTO_PIM 103 /* Protocol Independent Mcast */
63:
64: #define IPPROTO_DIVERT 254 /* divert pseudo-protocol */
65: #define IPPROTO_RAW 255 /* raw IP packet */
66: #define IPPROTO_MAX 256
67:
68:
69: /*
70: * Local port number conventions:
71: *
72: * When a user does a bind(2) or connect(2) with a port number of zero,
73: * a non-conflicting local port address is chosen.
74: * The default range is IPPORT_RESERVED through
75: * IPPORT_USERRESERVED, although that is settable by sysctl.
76: *
77: * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
78: * default assignment range.
79: *
80: * The value IP_PORTRANGE_DEFAULT causes the default behavior.
81: *
82: * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
83: * into the "high" range. These are reserved for client outbound connections
84: * which do not want to be filtered by any firewalls.
85: *
86: * The value IP_PORTRANGE_LOW changes the range to the "low" are
87: * that is (by convention) restricted to privileged processes. This
88: * convention is based on "vouchsafe" principles only. It is only secure
89: * if you trust the remote host to restrict these ports.
90: *
91: * The default range of ports and the high range can be changed by
92: * sysctl(3). (net.inet.ip.port{hi,low}{first,last}_auto)
93: *
94: * Changing those values has bad security implications if you are
95: * using a a stateless firewall that is allowing packets outside of that
96: * range in order to allow transparent outgoing connections.
97: *
98: * Such a firewall configuration will generally depend on the use of these
99: * default values. If you change them, you may find your Security
100: * Administrator looking for you with a heavy object.
101: */
102:
103: /*
104: * Ports < IPPORT_RESERVED are reserved for
105: * privileged processes (e.g. root). (IP_PORTRANGE_LOW)
106: * Ports > IPPORT_USERRESERVED are reserved
107: * for servers, not necessarily privileged. (IP_PORTRANGE_DEFAULT)
108: */
109: #define IPPORT_RESERVED 1024
110: #define IPPORT_USERRESERVED 5000
111:
112: /*
113: * Default local port range to use by setting IP_PORTRANGE_HIGH
114: */
115: #define IPPORT_HIFIRSTAUTO 40000
116: #define IPPORT_HILASTAUTO 44999
117:
118: /*
119: * Scanning for a free reserved port return a value below IPPORT_RESERVED,
120: * but higher than IPPORT_RESERVEDSTART. Traditionally the start value was
121: * 512, but that conflicts with some well-known-services that firewalls may
122: * have a fit if we use.
123: */
124: #define IPPORT_RESERVEDSTART 600
125:
126: /*
127: * Internet address (a structure for historical reasons)
128: */
129: struct in_addr {
130: u_long s_addr;
131: };
132:
133: /*
134: * Definitions of bits in internet address integers.
135: * On subnets, the decomposition of addresses to host and net parts
136: * is done according to subnet mask, not the masks here.
137: */
138: #define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0)
139: #define IN_CLASSA_NET 0xff000000
140: #define IN_CLASSA_NSHIFT 24
141: #define IN_CLASSA_HOST 0x00ffffff
142: #define IN_CLASSA_MAX 128
143:
144: #define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000)
145: #define IN_CLASSB_NET 0xffff0000
146: #define IN_CLASSB_NSHIFT 16
147: #define IN_CLASSB_HOST 0x0000ffff
148: #define IN_CLASSB_MAX 65536
149:
150: #define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000)
151: #define IN_CLASSC_NET 0xffffff00
152: #define IN_CLASSC_NSHIFT 8
153: #define IN_CLASSC_HOST 0x000000ff
154:
155: #define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000)
156: #define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */
157: #define IN_CLASSD_NSHIFT 28 /* net and host fields, but */
158: #define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */
159: #define IN_MULTICAST(i) IN_CLASSD(i)
160:
161: #define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000)
162: #define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000)
163:
164: #define INADDR_ANY (u_long)0x00000000
165: #define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */
166: #ifndef KERNEL
167: #define INADDR_NONE 0xffffffff /* -1 return */
168: #endif
169:
170: #define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */
171: #define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */
172: #define INADDR_ALLRTRS_GROUP (u_long)0xe0000002 /* 224.0.0.2 */
173: #define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */
174:
175: #define IN_LOOPBACKNET 127 /* official! */
176:
177: /*
178: * Socket address, internet style.
179: */
180: struct sockaddr_in {
181: u_char sin_len;
182: u_char sin_family;
183: u_short sin_port;
184: struct in_addr sin_addr;
185: char sin_zero[8];
186: };
187:
188: /*
189: * Structure used to describe IP options.
190: * Used to store options internally, to pass them to a process,
191: * or to restore options retrieved earlier.
192: * The ip_dst is used for the first-hop gateway when using a source route
193: * (this gets put into the header proper).
194: */
195: struct ip_opts {
196: struct in_addr ip_dst; /* first hop, 0 w/o src rt */
197: char ip_opts[40]; /* actually variable in size */
198: };
199:
200: /*
201: * Options for use with [gs]etsockopt at the IP level.
202: * First word of comment is data type; bool is stored in int.
203: */
204: #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */
205: #define IP_HDRINCL 2 /* int; header is included with data */
206: #define IP_TOS 3 /* int; IP type of service and preced. */
207: #define IP_TTL 4 /* int; IP time to live */
208: #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */
209: #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */
210: #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */
211: #define IP_RETOPTS 8 /* ip_opts; set/get IP options */
212: #define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */
213: #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */
214: #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */
215: #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
216: #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
217: #define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */
218: #define IP_RSVP_ON 15 /* enable RSVP in kernel */
219: #define IP_RSVP_OFF 16 /* disable RSVP in kernel */
220: #define IP_RSVP_VIF_ON 17 /* set RSVP per-vif socket */
221: #define IP_RSVP_VIF_OFF 18 /* unset RSVP per-vif socket */
222: #define IP_PORTRANGE 19 /* int; range to choose for unspec port */
223: #define IP_RECVIF 20 /* bool; receive reception if w/dgram */
224:
225: #define IP_FW_ADD 50 /* add a firewall rule to chain */
226: #define IP_FW_DEL 51 /* delete a firewall rule from chain */
227: #define IP_FW_FLUSH 52 /* flush firewall rule chain */
228: #define IP_FW_ZERO 53 /* clear single/all firewall counter(s) */
229: #define IP_FW_GET 54 /* get entire firewall rule chain */
230: #define IP_NAT 55 /* set/get NAT opts */
231:
232: /*
233: * Defaults and limits for options
234: */
235: #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */
236: #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
237: #define IP_MAX_MEMBERSHIPS 20 /* per socket */
238:
239: /*
240: * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
241: */
242: struct ip_mreq {
243: struct in_addr imr_multiaddr; /* IP multicast address of group */
244: struct in_addr imr_interface; /* local IP address of interface */
245: };
246:
247: /*
248: * Argument for IP_PORTRANGE:
249: * - which range to search when port is unspecified at bind() or connect()
250: */
251: #define IP_PORTRANGE_DEFAULT 0 /* default range */
252: #define IP_PORTRANGE_HIGH 1 /* "high" - request firewall bypass */
253: #define IP_PORTRANGE_LOW 2 /* "low" - vouchsafe security */
254:
255: /*
256: * Definitions for inet sysctl operations.
257: *
258: * Third level is protocol number.
259: * Fourth level is desired variable within that protocol.
260: */
261: #define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */
262:
263: #define CTL_IPPROTO_NAMES { \
264: { "ip", CTLTYPE_NODE }, \
265: { "icmp", CTLTYPE_NODE }, \
266: { "igmp", CTLTYPE_NODE }, \
267: { "ggp", CTLTYPE_NODE }, \
268: { 0, 0 }, \
269: { 0, 0 }, \
270: { "tcp", CTLTYPE_NODE }, \
271: { 0, 0 }, \
272: { "egp", CTLTYPE_NODE }, \
273: { 0, 0 }, \
274: { 0, 0 }, \
275: { 0, 0 }, \
276: { "pup", CTLTYPE_NODE }, \
277: { 0, 0 }, \
278: { 0, 0 }, \
279: { 0, 0 }, \
280: { 0, 0 }, \
281: { "udp", CTLTYPE_NODE }, \
282: { 0, 0 }, \
283: { 0, 0 }, \
284: { 0, 0 }, \
285: { 0, 0 }, \
286: { "idp", CTLTYPE_NODE }, \
287: { 0, 0 }, \
288: { 0, 0 }, \
289: { 0, 0 }, \
290: { 0, 0 }, \
291: { 0, 0 }, \
292: { 0, 0 }, \
293: { 0, 0 }, \
294: { 0, 0 }, \
295: { 0, 0 }, \
296: { 0, 0 }, \
297: { 0, 0 }, \
298: { 0, 0 }, \
299: { 0, 0 }, \
300: { 0, 0 }, \
301: { 0, 0 }, \
302: { 0, 0 }, \
303: { 0, 0 }, \
304: { 0, 0 }, \
305: { 0, 0 }, \
306: { 0, 0 }, \
307: { 0, 0 }, \
308: { 0, 0 }, \
309: { 0, 0 }, \
310: { 0, 0 }, \
311: { 0, 0 }, \
312: { 0, 0 }, \
313: { 0, 0 }, \
314: { 0, 0 }, \
315: { 0, 0 }, \
316: { 0, 0 }, \
317: { 0, 0 }, \
318: { 0, 0 }, \
319: { 0, 0 }, \
320: { 0, 0 }, \
321: { 0, 0 }, \
322: { 0, 0 }, \
323: { 0, 0 }, \
324: { 0, 0 }, \
325: { 0, 0 }, \
326: { 0, 0 }, \
327: { 0, 0 }, \
328: { 0, 0 }, \
329: { 0, 0 }, \
330: { 0, 0 }, \
331: { 0, 0 }, \
332: { 0, 0 }, \
333: { 0, 0 }, \
334: { 0, 0 }, \
335: { 0, 0 }, \
336: { 0, 0 }, \
337: { 0, 0 }, \
338: { 0, 0 }, \
339: { 0, 0 }, \
340: { 0, 0 }, \
341: { 0, 0 }, \
342: { 0, 0 }, \
343: { 0, 0 }, \
344: { 0, 0 }, \
345: { 0, 0 }, \
346: { 0, 0 }, \
347: { 0, 0 }, \
348: { 0, 0 }, \
349: { 0, 0 }, \
350: { 0, 0 }, \
351: { 0, 0 }, \
352: { 0, 0 }, \
353: { 0, 0 }, \
354: { 0, 0 }, \
355: { 0, 0 }, \
356: { 0, 0 }, \
357: { 0, 0 }, \
358: { 0, 0 }, \
359: { 0, 0 }, \
360: { 0, 0 }, \
361: { 0, 0 }, \
362: { 0, 0 }, \
363: { 0, 0 }, \
364: { 0, 0 }, \
365: { 0, 0 }, \
366: { 0, 0 }, \
367: { "pim", CTLTYPE_NODE }, \
368: }
369:
370: /*
371: * Names for IP sysctl objects
372: */
373: #define IPCTL_FORWARDING 1 /* act as router */
374: #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */
375: #define IPCTL_DEFTTL 3 /* default TTL */
376: #ifdef notyet
377: #define IPCTL_DEFMTU 4 /* default MTU */
378: #endif
379: #define IPCTL_RTEXPIRE 5 /* cloned route expiration time */
380: #define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */
381: #define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */
382: #define IPCTL_SOURCEROUTE 8 /* may perform source routes */
383: #define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */
384: #define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */
385: #define IPCTL_INTRQDROPS 11 /* number of netisr q drops */
386: #define IPCTL_MAXID 12
387:
388: #define IPCTL_NAMES { \
389: { 0, 0 }, \
390: { "forwarding", CTLTYPE_INT }, \
391: { "redirect", CTLTYPE_INT }, \
392: { "ttl", CTLTYPE_INT }, \
393: { "mtu", CTLTYPE_INT }, \
394: { "rtexpire", CTLTYPE_INT }, \
395: { "rtminexpire", CTLTYPE_INT }, \
396: { "rtmaxcache", CTLTYPE_INT }, \
397: { "sourceroute", CTLTYPE_INT }, \
398: { "directed-broadcast", CTLTYPE_INT }, \
399: { "intr-queue-maxlen", CTLTYPE_INT }, \
400: { "intr-queue-drops", CTLTYPE_INT }, \
401: }
402:
403:
404: #ifdef KERNEL
405: struct ifnet; struct mbuf; /* forward declarations for Standard C */
406:
407: int in_broadcast __P((struct in_addr, struct ifnet *));
408: int in_canforward __P((struct in_addr));
409: int in_cksum __P((struct mbuf *, int));
410: int in_localaddr __P((struct in_addr));
411: char *inet_ntoa __P((struct in_addr)); /* in libkern */
412:
413: /* Firewall hooks */
414: struct ip;
415: typedef int ip_fw_chk_t __P((struct ip**, int, struct ifnet*, int, struct mbuf**));
416: typedef int ip_fw_ctl_t __P((int, struct mbuf**));
417: extern ip_fw_chk_t *ip_fw_chk_ptr;
418: extern ip_fw_ctl_t *ip_fw_ctl_ptr;
419:
420: /* IP NAT hooks */
421: typedef int ip_nat_t __P((struct ip**, struct mbuf**, struct ifnet*, int));
422: typedef int ip_nat_ctl_t __P((int, struct mbuf**));
423: extern ip_nat_t *ip_nat_ptr;
424: extern ip_nat_ctl_t *ip_nat_ctl_ptr;
425: #define IP_NAT_IN 0x00000001
426: #define IP_NAT_OUT 0x00000002
427:
428: #endif /* KERNEL */
429:
430: #endif
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