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cfe8b629f1
freebsd/sys/netinet/in.h
Garrett Wollman cfe8b629f1 Yow! Completely change the way socket options are handled, eliminating 
another specialized mbuf type in the process.  Also clean up some
of the cruft surrounding IPFW, multicast routing, RSVP, and other
ill-explored corners.
1998-08-23 03:07:17 +00:00

435 lines
17 KiB
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/*
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)in.h 8.3 (Berkeley) 1/3/94
* $Id: in.h,v 1.36 1998/07/06 03:20:12 julian Exp $
*/
#ifndef _NETINET_IN_H_
#define _NETINET_IN_H_
/*
* Constants and structures defined by the internet system,
* Per RFC 790, September 1981, and numerous additions.
*/
/*
* Protocols (RFC 1700)
*/
#define IPPROTO_IP 0 /* dummy for IP */
#define IPPROTO_ICMP 1 /* control message protocol */
#define IPPROTO_IGMP 2 /* group mgmt protocol */
#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */
#define IPPROTO_IPIP 4 /* IP encapsulation in IP */
#define IPPROTO_TCP 6 /* tcp */
#define IPPROTO_ST 7 /* Stream protocol II */
#define IPPROTO_EGP 8 /* exterior gateway protocol */
#define IPPROTO_PIGP 9 /* private interior gateway */
#define IPPROTO_RCCMON 10 /* BBN RCC Monitoring */
#define IPPROTO_NVPII 11 /* network voice protocol*/
#define IPPROTO_PUP 12 /* pup */
#define IPPROTO_ARGUS 13 /* Argus */
#define IPPROTO_EMCON 14 /* EMCON */
#define IPPROTO_XNET 15 /* Cross Net Debugger */
#define IPPROTO_CHAOS 16 /* Chaos*/
#define IPPROTO_UDP 17 /* user datagram protocol */
#define IPPROTO_MUX 18 /* Multiplexing */
#define IPPROTO_MEAS 19 /* DCN Measurement Subsystems */
#define IPPROTO_HMP 20 /* Host Monitoring */
#define IPPROTO_PRM 21 /* Packet Radio Measurement */
#define IPPROTO_IDP 22 /* xns idp */
#define IPPROTO_TRUNK1 23 /* Trunk-1 */
#define IPPROTO_TRUNK2 24 /* Trunk-2 */
#define IPPROTO_LEAF1 25 /* Leaf-1 */
#define IPPROTO_LEAF2 26 /* Leaf-2 */
#define IPPROTO_RDP 27 /* Reliable Data */
#define IPPROTO_IRTP 28 /* Reliable Transaction */
#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
#define IPPROTO_BLT 30 /* Bulk Data Transfer */
#define IPPROTO_NSP 31 /* Network Services */
#define IPPROTO_INP 32 /* Merit Internodal */
#define IPPROTO_SEP 33 /* Sequential Exchange */
#define IPPROTO_3PC 34 /* Third Party Connect */
#define IPPROTO_IDPR 35 /* InterDomain Policy Routing */
#define IPPROTO_XTP 36 /* XTP */
#define IPPROTO_DDP 37 /* Datagram Delivery */
#define IPPROTO_CMTP 38 /* Control Message Transport */
#define IPPROTO_TPXX 39 /* TP++ Transport */
#define IPPROTO_IL 40 /* IL transport protocol */
#define IPPROTO_SIP 41 /* Simple Internet Protocol */
#define IPPROTO_SDRP 42 /* Source Demand Routing */
#define IPPROTO_SIPSR 43 /* SIP Source Route */
#define IPPROTO_SIPFRAG 44 /* SIP Fragment */
#define IPPROTO_IDRP 45 /* InterDomain Routing*/
#define IPPROTO_RSVP 46 /* resource reservation */
#define IPPROTO_GRE 47 /* General Routing Encap. */
#define IPPROTO_MHRP 48 /* Mobile Host Routing */
#define IPPROTO_BHA 49 /* BHA */
#define IPPROTO_ESP 50 /* SIPP Encap Sec. Payload */
#define IPPROTO_AH 51 /* SIPP Auth Header */
#define IPPROTO_INLSP 52 /* Integ. Net Layer Security */
#define IPPROTO_SWIPE 53 /* IP with encryption */
#define IPPROTO_NHRP 54 /* Next Hop Resolution */
/* 55-60: Unassigned */
#define IPPROTO_AHIP 61 /* any host internal protocol */
#define IPPROTO_CFTP 62 /* CFTP */
#define IPPROTO_HELLO 63 /* "hello" routing protocol */
#define IPPROTO_SATEXPAK 64 /* SATNET/Backroom EXPAK */
#define IPPROTO_KRYPTOLAN 65 /* Kryptolan */
#define IPPROTO_RVD 66 /* Remote Virtual Disk */
#define IPPROTO_IPPC 67 /* Pluribus Packet Core */
#define IPPROTO_ADFS 68 /* Any distributed FS */
#define IPPROTO_SATMON 69 /* Satnet Monitoring */
#define IPPROTO_VISA 70 /* VISA Protocol */
#define IPPROTO_IPCV 71 /* Packet Core Utility */
#define IPPROTO_CPNX 72 /* Comp. Prot. Net. Executive */
#define IPPROTO_CPHB 73 /* Comp. Prot. HeartBeat */
#define IPPROTO_WSN 74 /* Wang Span Network */
#define IPPROTO_PVP 75 /* Packet Video Protocol */
#define IPPROTO_BRSATMON 76 /* BackRoom SATNET Monitoring */
#define IPPROTO_ND 77 /* Sun net disk proto (temp.) */
#define IPPROTO_WBMON 78 /* WIDEBAND Monitoring */
#define IPPROTO_WBEXPAK 79 /* WIDEBAND EXPAK */
#define IPPROTO_EON 80 /* ISO cnlp */
#define IPPROTO_VMTP 81 /* VMTP */
#define IPPROTO_SVMTP 82 /* Secure VMTP */
#define IPPROTO_VINES 83 /* Banyon VINES */
#define IPPROTO_TTP 84 /* TTP */
#define IPPROTO_IGP 85 /* NSFNET-IGP */
#define IPPROTO_DGP 86 /* dissimilar gateway prot. */
#define IPPROTO_TCF 87 /* TCF */
#define IPPROTO_IGRP 88 /* Cisco/GXS IGRP */
#define IPPROTO_OSPFIGP 89 /* OSPFIGP */
#define IPPROTO_SRPC 90 /* Strite RPC protocol */
#define IPPROTO_LARP 91 /* Locus Address Resoloution */
#define IPPROTO_MTP 92 /* Multicast Transport */
#define IPPROTO_AX25 93 /* AX.25 Frames */
#define IPPROTO_IPEIP 94 /* IP encapsulated in IP */
#define IPPROTO_MICP 95 /* Mobile Int.ing control */
#define IPPROTO_SCCSP 96 /* Semaphore Comm. security */
#define IPPROTO_ETHERIP 97 /* Ethernet IP encapsulation */
#define IPPROTO_ENCAP 98 /* encapsulation header */
#define IPPROTO_APES 99 /* any private encr. scheme */
#define IPPROTO_GMTP 100 /* GMTP*/
/* 101-254: Unassigned */
/* 255: Reserved */
/* BSD Private, local use, namespace incursion */
#define IPPROTO_DIVERT 254 /* divert pseudo-protocol */
#define IPPROTO_RAW 255 /* raw IP packet */
#define IPPROTO_MAX 256
/*
* Local port number conventions:
*
* When a user does a bind(2) or connect(2) with a port number of zero,
* a non-conflicting local port address is chosen.
* The default range is IPPORT_RESERVED through
* IPPORT_USERRESERVED, although that is settable by sysctl.
*
* A user may set the IPPROTO_IP option IP_PORTRANGE to change this
* default assignment range.
*
* The value IP_PORTRANGE_DEFAULT causes the default behavior.
*
* The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
* into the "high" range. These are reserved for client outbound connections
* which do not want to be filtered by any firewalls.
*
* The value IP_PORTRANGE_LOW changes the range to the "low" are
* that is (by convention) restricted to privileged processes. This
* convention is based on "vouchsafe" principles only. It is only secure
* if you trust the remote host to restrict these ports.
*
* The default range of ports and the high range can be changed by
* sysctl(3). (net.inet.ip.port{hi,low}{first,last}_auto)
*
* Changing those values has bad security implications if you are
* using a a stateless firewall that is allowing packets outside of that
* range in order to allow transparent outgoing connections.
*
* Such a firewall configuration will generally depend on the use of these
* default values. If you change them, you may find your Security
* Administrator looking for you with a heavy object.
*
* For a slightly more orthodox text view on this:
*
* ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers
*
* port numbers are divided into three ranges:
*
* 0 - 1023 Well Known Ports
* 1024 - 49151 Registered Ports
* 49152 - 65535 Dynamic and/or Private Ports
*
*/
/*
* Ports < IPPORT_RESERVED are reserved for
* privileged processes (e.g. root). (IP_PORTRANGE_LOW)
* Ports > IPPORT_USERRESERVED are reserved
* for servers, not necessarily privileged. (IP_PORTRANGE_DEFAULT)
*/
#define IPPORT_RESERVED 1024
#define IPPORT_USERRESERVED 5000
/*
* Default local port range to use by setting IP_PORTRANGE_HIGH
*/
#define IPPORT_HIFIRSTAUTO 49152
#define IPPORT_HILASTAUTO 65535
/*
* Scanning for a free reserved port return a value below IPPORT_RESERVED,
* but higher than IPPORT_RESERVEDSTART. Traditionally the start value was
* 512, but that conflicts with some well-known-services that firewalls may
* have a fit if we use.
*/
#define IPPORT_RESERVEDSTART 600
/*
* Internet address (a structure for historical reasons)
*/
struct in_addr {
u_int32_t s_addr;
};
/*
* Definitions of bits in internet address integers.
* On subnets, the decomposition of addresses to host and net parts
* is done according to subnet mask, not the masks here.
*/
#define IN_CLASSA(i) (((u_int32_t)(i) & 0x80000000) == 0)
#define IN_CLASSA_NET 0xff000000
#define IN_CLASSA_NSHIFT 24
#define IN_CLASSA_HOST 0x00ffffff
#define IN_CLASSA_MAX 128
#define IN_CLASSB(i) (((u_int32_t)(i) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET 0xffff0000
#define IN_CLASSB_NSHIFT 16
#define IN_CLASSB_HOST 0x0000ffff
#define IN_CLASSB_MAX 65536
#define IN_CLASSC(i) (((u_int32_t)(i) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET 0xffffff00
#define IN_CLASSC_NSHIFT 8
#define IN_CLASSC_HOST 0x000000ff
#define IN_CLASSD(i) (((u_int32_t)(i) & 0xf0000000) == 0xe0000000)
#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */
#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */
#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */
#define IN_MULTICAST(i) IN_CLASSD(i)
#define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & 0xf0000000) == 0xf0000000)
#define IN_BADCLASS(i) (((u_int32_t)(i) & 0xf0000000) == 0xf0000000)
#define INADDR_ANY (u_int32_t)0x00000000
#define INADDR_LOOPBACK (u_int32_t)0x7f000001
#define INADDR_BROADCAST (u_int32_t)0xffffffff /* must be masked */
#ifndef KERNEL
#define INADDR_NONE 0xffffffff /* -1 return */
#endif
#define INADDR_UNSPEC_GROUP (u_int32_t)0xe0000000 /* 224.0.0.0 */
#define INADDR_ALLHOSTS_GROUP (u_int32_t)0xe0000001 /* 224.0.0.1 */
#define INADDR_ALLRTRS_GROUP (u_int32_t)0xe0000002 /* 224.0.0.2 */
#define INADDR_MAX_LOCAL_GROUP (u_int32_t)0xe00000ff /* 224.0.0.255 */
#define IN_LOOPBACKNET 127 /* official! */
/*
* Socket address, internet style.
*/
struct sockaddr_in {
u_char sin_len;
u_char sin_family;
u_short sin_port;
struct in_addr sin_addr;
char sin_zero[8];
};
/*
* Structure used to describe IP options.
* Used to store options internally, to pass them to a process,
* or to restore options retrieved earlier.
* The ip_dst is used for the first-hop gateway when using a source route
* (this gets put into the header proper).
*/
struct ip_opts {
struct in_addr ip_dst; /* first hop, 0 w/o src rt */
char ip_opts[40]; /* actually variable in size */
};
/*
* Options for use with [gs]etsockopt at the IP level.
* First word of comment is data type; bool is stored in int.
*/
#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */
#define IP_HDRINCL 2 /* int; header is included with data */
#define IP_TOS 3 /* int; IP type of service and preced. */
#define IP_TTL 4 /* int; IP time to live */
#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */
#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */
#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */
#define IP_RETOPTS 8 /* ip_opts; set/get IP options */
#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */
#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */
#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */
#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */
#define IP_RSVP_ON 15 /* enable RSVP in kernel */
#define IP_RSVP_OFF 16 /* disable RSVP in kernel */
#define IP_RSVP_VIF_ON 17 /* set RSVP per-vif socket */
#define IP_RSVP_VIF_OFF 18 /* unset RSVP per-vif socket */
#define IP_PORTRANGE 19 /* int; range to choose for unspec port */
#define IP_RECVIF 20 /* bool; receive reception if w/dgram */
#define IP_FW_ADD 50 /* add a firewall rule to chain */
#define IP_FW_DEL 51 /* delete a firewall rule from chain */
#define IP_FW_FLUSH 52 /* flush firewall rule chain */
#define IP_FW_ZERO 53 /* clear single/all firewall counter(s) */
#define IP_FW_GET 54 /* get entire firewall rule chain */
#define IP_NAT 55 /* set/get NAT opts */
/*
* Defaults and limits for options
*/
#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */
#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
#define IP_MAX_MEMBERSHIPS 20 /* per socket */
/*
* Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
*/
struct ip_mreq {
struct in_addr imr_multiaddr; /* IP multicast address of group */
struct in_addr imr_interface; /* local IP address of interface */
};
/*
* Argument for IP_PORTRANGE:
* - which range to search when port is unspecified at bind() or connect()
*/
#define IP_PORTRANGE_DEFAULT 0 /* default range */
#define IP_PORTRANGE_HIGH 1 /* "high" - request firewall bypass */
#define IP_PORTRANGE_LOW 2 /* "low" - vouchsafe security */
/*
* Definitions for inet sysctl operations.
*
* Third level is protocol number.
* Fourth level is desired variable within that protocol.
*/
#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */
#define CTL_IPPROTO_NAMES { \
{ "ip", CTLTYPE_NODE }, \
{ "icmp", CTLTYPE_NODE }, \
{ "igmp", CTLTYPE_NODE }, \
{ "ggp", CTLTYPE_NODE }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ "tcp", CTLTYPE_NODE }, \
{ 0, 0 }, \
{ "egp", CTLTYPE_NODE }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ "pup", CTLTYPE_NODE }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ "udp", CTLTYPE_NODE }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ "idp", CTLTYPE_NODE }, \
}
/*
* Names for IP sysctl objects
*/
#define IPCTL_FORWARDING 1 /* act as router */
#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */
#define IPCTL_DEFTTL 3 /* default TTL */
#ifdef notyet
#define IPCTL_DEFMTU 4 /* default MTU */
#endif
#define IPCTL_RTEXPIRE 5 /* cloned route expiration time */
#define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */
#define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */
#define IPCTL_SOURCEROUTE 8 /* may perform source routes */
#define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */
#define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */
#define IPCTL_INTRQDROPS 11 /* number of netisr q drops */
#define IPCTL_STATS 12 /* ipstat structure */
#define IPCTL_ACCEPTSOURCEROUTE 13 /* may accept source routed packets */
#define IPCTL_FASTFORWARDING 14 /* use fast IP forwarding code */
#define IPCTL_MAXID 15
#define IPCTL_NAMES { \
{ 0, 0 }, \
{ "forwarding", CTLTYPE_INT }, \
{ "redirect", CTLTYPE_INT }, \
{ "ttl", CTLTYPE_INT }, \
{ "mtu", CTLTYPE_INT }, \
{ "rtexpire", CTLTYPE_INT }, \
{ "rtminexpire", CTLTYPE_INT }, \
{ "rtmaxcache", CTLTYPE_INT }, \
{ "sourceroute", CTLTYPE_INT }, \
{ "directed-broadcast", CTLTYPE_INT }, \
{ "intr-queue-maxlen", CTLTYPE_INT }, \
{ "intr-queue-drops", CTLTYPE_INT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "accept_sourceroute", CTLTYPE_INT }, \
{ "fastforwarding", CTLTYPE_INT }, \
}
#ifdef KERNEL
struct ifnet; struct mbuf; /* forward declarations for Standard C */
int in_broadcast __P((struct in_addr, struct ifnet *));
int in_canforward __P((struct in_addr));
int in_cksum __P((struct mbuf *, int));
int in_localaddr __P((struct in_addr));
char *inet_ntoa __P((struct in_addr)); /* in libkern */
#endif /* KERNEL */
#endif
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