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 * $FreeBSD$ 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: Partly Unassigned */ 144 #define IPPROTO_PGM 113 /* PGM */ 145 /* 255: Reserved */ 146 /* BSD Private, local use, namespace incursion */ 147 #define IPPROTO_DIVERT 254 /* divert pseudo-protocol */ 148 #define IPPROTO_RAW 255 /* raw IP packet */ 149 #define IPPROTO_MAX 256 150 151 152 /* 153 * Local port number conventions: 154 * 155 * When a user does a bind(2) or connect(2) with a port number of zero, 156 * a non-conflicting local port address is chosen. 157 * The default range is IPPORT_RESERVED through 158 * IPPORT_USERRESERVED, although that is settable by sysctl. 159 * 160 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 161 * default assignment range. 162 * 163 * The value IP_PORTRANGE_DEFAULT causes the default behavior. 164 * 165 * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers 166 * into the "high" range. These are reserved for client outbound connections 167 * which do not want to be filtered by any firewalls. 168 * 169 * The value IP_PORTRANGE_LOW changes the range to the "low" are 170 * that is (by convention) restricted to privileged processes. This 171 * convention is based on "vouchsafe" principles only. It is only secure 172 * if you trust the remote host to restrict these ports. 173 * 174 * The default range of ports and the high range can be changed by 175 * sysctl(3). (net.inet.ip.port{hi,low}{first,last}_auto) 176 * 177 * Changing those values has bad security implications if you are 178 * using a a stateless firewall that is allowing packets outside of that 179 * range in order to allow transparent outgoing connections. 180 * 181 * Such a firewall configuration will generally depend on the use of these 182 * default values. If you change them, you may find your Security 183 * Administrator looking for you with a heavy object. 184 * 185 * For a slightly more orthodox text view on this: 186 * 187 * ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers 188 * 189 * port numbers are divided into three ranges: 190 * 191 * 0 - 1023 Well Known Ports 192 * 1024 - 49151 Registered Ports 193 * 49152 - 65535 Dynamic and/or Private Ports 194 * 195 */ 196 197 /* 198 * Ports < IPPORT_RESERVED are reserved for 199 * privileged processes (e.g. root). (IP_PORTRANGE_LOW) 200 * Ports > IPPORT_USERRESERVED are reserved 201 * for servers, not necessarily privileged. (IP_PORTRANGE_DEFAULT) 202 */ 203 #define IPPORT_RESERVED 1024 204 #define IPPORT_USERRESERVED 5000 205 206 /* 207 * Default local port range to use by setting IP_PORTRANGE_HIGH 208 */ 209 #define IPPORT_HIFIRSTAUTO 49152 210 #define IPPORT_HILASTAUTO 65535 211 212 /* 213 * Scanning for a free reserved port return a value below IPPORT_RESERVED, 214 * but higher than IPPORT_RESERVEDSTART. Traditionally the start value was 215 * 512, but that conflicts with some well-known-services that firewalls may 216 * have a fit if we use. 217 */ 218 #define IPPORT_RESERVEDSTART 600 219 220 /* 221 * Internet address (a structure for historical reasons) 222 */ 223 struct in_addr { 224 u_int32_t s_addr; 225 }; 226 227 /* 228 * Definitions of bits in internet address integers. 229 * On subnets, the decomposition of addresses to host and net parts 230 * is done according to subnet mask, not the masks here. 231 */ 232 #define IN_CLASSA(i) (((u_int32_t)(i) & 0x80000000) == 0) 233 #define IN_CLASSA_NET 0xff000000 234 #define IN_CLASSA_NSHIFT 24 235 #define IN_CLASSA_HOST 0x00ffffff 236 #define IN_CLASSA_MAX 128 237 238 #define IN_CLASSB(i) (((u_int32_t)(i) & 0xc0000000) == 0x80000000) 239 #define IN_CLASSB_NET 0xffff0000 240 #define IN_CLASSB_NSHIFT 16 241 #define IN_CLASSB_HOST 0x0000ffff 242 #define IN_CLASSB_MAX 65536 243 244 #define IN_CLASSC(i) (((u_int32_t)(i) & 0xe0000000) == 0xc0000000) 245 #define IN_CLASSC_NET 0xffffff00 246 #define IN_CLASSC_NSHIFT 8 247 #define IN_CLASSC_HOST 0x000000ff 248 249 #define IN_CLASSD(i) (((u_int32_t)(i) & 0xf0000000) == 0xe0000000) 250 #define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 251 #define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 252 #define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 253 #define IN_MULTICAST(i) IN_CLASSD(i) 254 255 #define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & 0xf0000000) == 0xf0000000) 256 #define IN_BADCLASS(i) (((u_int32_t)(i) & 0xf0000000) == 0xf0000000) 257 258 #define INADDR_ANY (u_int32_t)0x00000000 259 #define INADDR_LOOPBACK (u_int32_t)0x7f000001 260 #define INADDR_BROADCAST (u_int32_t)0xffffffff /* must be masked */ 261 #ifndef KERNEL 262 #define INADDR_NONE 0xffffffff /* -1 return */ 263 #endif 264 265 #define INADDR_UNSPEC_GROUP (u_int32_t)0xe0000000 /* 224.0.0.0 */ 266 #define INADDR_ALLHOSTS_GROUP (u_int32_t)0xe0000001 /* 224.0.0.1 */ 267 #define INADDR_ALLRTRS_GROUP (u_int32_t)0xe0000002 /* 224.0.0.2 */ 268 #define INADDR_MAX_LOCAL_GROUP (u_int32_t)0xe00000ff /* 224.0.0.255 */ 269 270 #define IN_LOOPBACKNET 127 /* official! */ 271 272 /* 273 * Socket address, internet style. 274 */ 275 struct sockaddr_in { 276 u_char sin_len; 277 u_char sin_family; 278 u_short sin_port; 279 struct in_addr sin_addr; 280 char sin_zero[8]; 281 }; 282 283 /* 284 * Structure used to describe IP options. 285 * Used to store options internally, to pass them to a process, 286 * or to restore options retrieved earlier. 287 * The ip_dst is used for the first-hop gateway when using a source route 288 * (this gets put into the header proper). 289 */ 290 struct ip_opts { 291 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 292 char ip_opts[40]; /* actually variable in size */ 293 }; 294 295 /* 296 * Options for use with [gs]etsockopt at the IP level. 297 * First word of comment is data type; bool is stored in int. 298 */ 299 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 300 #define IP_HDRINCL 2 /* int; header is included with data */ 301 #define IP_TOS 3 /* int; IP type of service and preced. */ 302 #define IP_TTL 4 /* int; IP time to live */ 303 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 304 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 305 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 306 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 307 #define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 308 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 309 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 310 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 311 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 312 #define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */ 313 #define IP_RSVP_ON 15 /* enable RSVP in kernel */ 314 #define IP_RSVP_OFF 16 /* disable RSVP in kernel */ 315 #define IP_RSVP_VIF_ON 17 /* set RSVP per-vif socket */ 316 #define IP_RSVP_VIF_OFF 18 /* unset RSVP per-vif socket */ 317 #define IP_PORTRANGE 19 /* int; range to choose for unspec port */ 318 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */ 319 320 #define IP_FW_ADD 50 /* add a firewall rule to chain */ 321 #define IP_FW_DEL 51 /* delete a firewall rule from chain */ 322 #define IP_FW_FLUSH 52 /* flush firewall rule chain */ 323 #define IP_FW_ZERO 53 /* clear single/all firewall counter(s) */ 324 #define IP_FW_GET 54 /* get entire firewall rule chain */ 325 #define IP_FW_RESETLOG 55 /* reset logging counters */ 326 327 #define IP_DUMMYNET_CONFIGURE 60 /* add/configure a dummynet pipe */ 328 #define IP_DUMMYNET_DEL 61 /* delete a dummynet pipe from chain */ 329 #define IP_DUMMYNET_FLUSH 62 /* flush dummynet */ 330 #define IP_DUMMYNET_GET 64 /* get entire dummynet pipes */ 331 332 /* 333 * Defaults and limits for options 334 */ 335 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 336 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 337 #define IP_MAX_MEMBERSHIPS 20 /* per socket */ 338 339 /* 340 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 341 */ 342 struct ip_mreq { 343 struct in_addr imr_multiaddr; /* IP multicast address of group */ 344 struct in_addr imr_interface; /* local IP address of interface */ 345 }; 346 347 /* 348 * Argument for IP_PORTRANGE: 349 * - which range to search when port is unspecified at bind() or connect() 350 */ 351 #define IP_PORTRANGE_DEFAULT 0 /* default range */ 352 #define IP_PORTRANGE_HIGH 1 /* "high" - request firewall bypass */ 353 #define IP_PORTRANGE_LOW 2 /* "low" - vouchsafe security */ 354 355 /* 356 * Definitions for inet sysctl operations. 357 * 358 * Third level is protocol number. 359 * Fourth level is desired variable within that protocol. 360 */ 361 #define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 362 363 #define CTL_IPPROTO_NAMES { \ 364 { "ip", CTLTYPE_NODE }, \ 365 { "icmp", CTLTYPE_NODE }, \ 366 { "igmp", CTLTYPE_NODE }, \ 367 { "ggp", CTLTYPE_NODE }, \ 368 { 0, 0 }, \ 369 { 0, 0 }, \ 370 { "tcp", CTLTYPE_NODE }, \ 371 { 0, 0 }, \ 372 { "egp", CTLTYPE_NODE }, \ 373 { 0, 0 }, \ 374 { 0, 0 }, \ 375 { 0, 0 }, \ 376 { "pup", CTLTYPE_NODE }, \ 377 { 0, 0 }, \ 378 { 0, 0 }, \ 379 { 0, 0 }, \ 380 { 0, 0 }, \ 381 { "udp", CTLTYPE_NODE }, \ 382 { 0, 0 }, \ 383 { 0, 0 }, \ 384 { 0, 0 }, \ 385 { 0, 0 }, \ 386 { "idp", CTLTYPE_NODE }, \ 387 } 388 389 /* 390 * Names for IP sysctl objects 391 */ 392 #define IPCTL_FORWARDING 1 /* act as router */ 393 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 394 #define IPCTL_DEFTTL 3 /* default TTL */ 395 #ifdef notyet 396 #define IPCTL_DEFMTU 4 /* default MTU */ 397 #endif 398 #define IPCTL_RTEXPIRE 5 /* cloned route expiration time */ 399 #define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */ 400 #define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */ 401 #define IPCTL_SOURCEROUTE 8 /* may perform source routes */ 402 #define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */ 403 #define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */ 404 #define IPCTL_INTRQDROPS 11 /* number of netisr q drops */ 405 #define IPCTL_STATS 12 /* ipstat structure */ 406 #define IPCTL_ACCEPTSOURCEROUTE 13 /* may accept source routed packets */ 407 #define IPCTL_FASTFORWARDING 14 /* use fast IP forwarding code */ 408 #define IPCTL_MAXID 15 409 410 #define IPCTL_NAMES { \ 411 { 0, 0 }, \ 412 { "forwarding", CTLTYPE_INT }, \ 413 { "redirect", CTLTYPE_INT }, \ 414 { "ttl", CTLTYPE_INT }, \ 415 { "mtu", CTLTYPE_INT }, \ 416 { "rtexpire", CTLTYPE_INT }, \ 417 { "rtminexpire", CTLTYPE_INT }, \ 418 { "rtmaxcache", CTLTYPE_INT }, \ 419 { "sourceroute", CTLTYPE_INT }, \ 420 { "directed-broadcast", CTLTYPE_INT }, \ 421 { "intr-queue-maxlen", CTLTYPE_INT }, \ 422 { "intr-queue-drops", CTLTYPE_INT }, \ 423 { "stats", CTLTYPE_STRUCT }, \ 424 { "accept_sourceroute", CTLTYPE_INT }, \ 425 { "fastforwarding", CTLTYPE_INT }, \ 426 } 427 428 429 #ifdef KERNEL 430 struct ifnet; struct mbuf; /* forward declarations for Standard C */ 431 struct proc; 432 433 int in_broadcast __P((struct in_addr, struct ifnet *)); 434 int in_canforward __P((struct in_addr)); 435 int in_cksum __P((struct mbuf *, int)); 436 int in_localaddr __P((struct in_addr)); 437 char *inet_ntoa __P((struct in_addr)); /* in libkern */ 438 439 int prison_ip __P((struct proc *p, int flag, u_int32_t *ip)); 440 void prison_remote_ip __P((struct proc *p, int flag, u_int32_t *ip)); 441 442 #endif /* KERNEL */ 443 444 #endif 445