Annotation of embedaddon/pimd/include/freebsd2/netinet/in.h, revision 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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