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| /*!\file netinet/in.h |
| * IP address, options and definitions. |
| */ |
| |
| /* |
| * 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 1.22.2.1 1996/11/11 23:40:37 phk Exp $ |
| */ |
| |
| #ifndef __NETINET_IN_H |
| #define __NETINET_IN_H |
| |
| #ifndef __SYS_SOCKET_H |
| #include <sys/socket.h> |
| #endif |
| |
| /* |
| * Constants and structures defined by the internet system, |
| * Per RFC 790, September 1981, and numerous additions. |
| */ |
| |
| /* |
| * Protocols |
| */ |
| #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_EGP 8 /* exterior gateway protocol */ |
| #define IPPROTO_IGRP 9 /* interior gw routing protocol */ |
| #define IPPROTO_PUP 12 /* pup */ |
| #define IPPROTO_UDP 17 /* user datagram protocol */ |
| #define IPPROTO_IDP 22 /* xns idp */ |
| #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ |
| #define IPPROTO_XTP 36 /* eXpress Transfer Protocol */ |
| #define IPPROTO_RSVP 46 /* resource reservation */ |
| #define IPPROTO_ESP 50 |
| #define IPPROTO_AH 51 /* authenticate header */ |
| #define IPPROTO_ICMPV6 58 /* ICMP v6 */ |
| #define IPPROTO_NONE 59 |
| #define IPPROTO_EON 80 /* ISO cnlp */ |
| #define IPPROTO_ENCAP 98 /* encapsulation header */ |
| #define IPPROTO_PIM 103 |
| #define IPPROTO_VRRP 112 |
| #define IPPROTO_SCTP 132 |
| |
| #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. |
| */ |
| |
| /* |
| * 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 40000 |
| #define IPPORT_HILASTAUTO 44999 |
| |
| /* |
| * 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_long s_addr; |
| }; |
| /* |
| * For IPv6 from RFC2133 |
| */ |
| struct in6_addr { |
| u_int8_t s6_addr[16]; |
| }; |
| |
| /* |
| * 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) (((long)(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) (((long)(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) (((long)(i) & 0xE0000000) == 0xC0000000) |
| #define IN_CLASSC_NET 0xffffff00 |
| #define IN_CLASSC_NSHIFT 8 |
| #define IN_CLASSC_HOST 0x000000ff |
| |
| #define IN_CLASSD(i) (((long)(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) (((long)(i) & 0xF0000000) == 0xF0000000) |
| #define IN_BADCLASS(i) (((long)(i) & 0xF0000000) == 0xF0000000) |
| |
| #define INADDR_ANY (u_long)0x00000000 |
| #define INADDR_BROADCAST (u_long)0xFFFFFFFF /* must be masked */ |
| #define INADDR_LOOPBACK (u_long)0x7F000001 /* 127.0.0.1 */ |
| #define INADDR_NONE 0xFFFFFFFF /* -1 return */ |
| |
| #define INADDR_UNSPEC_GROUP (u_long)0xE0000000 /* 224.0.0.0 */ |
| #define INADDR_ALLHOSTS_GROUP (u_long)0xE0000001 /* 224.0.0.1 */ |
| #define INADDR_ALLRTRS_GROUP (u_long)0xE0000002 /* 224.0.0.2 */ |
| #define INADDR_MAX_LOCAL_GROUP (u_long)0xE00000FF /* 224.0.0.255 */ |
| |
| #define IN_LOOPBACKNET 127 /* official! */ |
| |
| W32_DATA const struct in6_addr in6addr_any; /* :: */ |
| W32_DATA const struct in6_addr in6addr_loopback; /* ::1 */ |
| |
| #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } |
| #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } |
| |
| #define INET_ADDRSTRLEN 16 |
| #define INET6_ADDRSTRLEN 46 |
| |
| |
| /* |
| * Socket address, internet style. |
| */ |
| struct sockaddr_in { |
| u_short sin_family; |
| u_short sin_port; |
| struct in_addr sin_addr; |
| char sin_zero[8]; |
| }; |
| |
| struct sockaddr_in6 { |
| u_int16_t sin6_family; |
| u_int16_t sin6_port; |
| u_int32_t sin6_flowinfo; |
| struct in6_addr sin6_addr; |
| u_int32_t sin6_scope_id; /* IPv6 scope-id */ |
| }; |
| |
| /* |
| * Stolen from winsock2.h (hope this is portable) |
| * Portable IPv6/IPv4 version of sockaddr. |
| * Uses padding to force 8 byte alignment |
| * and maximum size of 128 bytes |
| */ |
| struct sockaddr_storage { |
| u_short ss_family; |
| u_short ss_len; /* !! added for BSD progs, gv Nov-2003 */ |
| char __ss_pad1[6]; /* pad to 8 */ |
| long __ss_align1, __ssalign2; /* force alignment */ |
| char __ss_pad2[110]; /* pad to 128 */ |
| }; |
| |
| |
| /* IPv6 multicast request. */ |
| struct ipv6_mreq { |
| /* IPv6 multicast address of group */ |
| struct in6_addr ipv6mr_multiaddr; |
| |
| /* local interface */ |
| unsigned long ipv6mr_interface; |
| }; |
| |
| /* |
| * 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 */ |
| #define IPCTL_DEFMTU 4 /* default MTU */ |
| #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_MAXID 12 |
| |
| #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 }, \ |
| } |
| |
| |
| /* |
| * IPv6 address macros |
| */ |
| #define IN6_IS_ADDR_UNSPECIFIED(a) \ |
| (((u_int32_t*)(a))[0] == 0 \ |
| && ((u_int32_t*)(a))[1] == 0 \ |
| && ((u_int32_t*)(a))[2] == 0 \ |
| && ((u_int32_t*)(a))[3] == 0) |
| |
| #define IN6_IS_ADDR_LOOPBACK(a) \ |
| (((u_int32_t*)(a))[0] == 0 \ |
| && ((u_int32_t*)(a))[1] == 0 \ |
| && ((u_int32_t*)(a))[2] == 0 \ |
| && ((u_int32_t*)(a))[3] == htonl (1)) |
| |
| #define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t*) (a))[0] == 0xff) |
| |
| #define IN6_IS_ADDR_LINKLOCAL(a) \ |
| ((((u_int32_t*)(a))[0] & htonl(0xffc00000)) == htonl(0xfe800000)) |
| |
| #define IN6_IS_ADDR_SITELOCAL(a) \ |
| ((((u_int32_t*)(a))[0] & htonl(0xffc00000)) == htonl(0xfec00000)) |
| |
| #define IN6_IS_ADDR_V4MAPPED(a) \ |
| ((((u_int32_t*)(a))[0] == 0) \ |
| && (((u_int32_t*)(a))[1] == 0) \ |
| && (((u_int32_t*)(a))[2] == htonl(0xffff))) |
| |
| #define IN6_IS_ADDR_V4COMPAT(a) \ |
| ((((u_int32_t*)(a))[0] == 0) \ |
| && (((u_int32_t*)(a))[1] == 0) \ |
| && (((u_int32_t*)(a))[2] == 0) \ |
| && (ntohl(((u_int32_t*)(a))[3]) > 1)) |
| |
| #define IN6_ARE_ADDR_EQUAL(a,b) \ |
| ((((u_int32_t*)(a))[0] == ((u_int32_t*)(b))[0]) \ |
| && (((u_int32_t*)(a))[1] == ((u_int32_t*)(b))[1]) \ |
| && (((u_int32_t*)(a))[2] == ((u_int32_t*)(b))[2]) \ |
| && (((u_int32_t*)(a))[3] == ((u_int32_t*)(b))[3])) |
| |
| #define IN6_IS_ADDR_MC_NODELOCAL(a) \ |
| (IN6_IS_ADDR_MULTICAST(a) && ((((u_int8_t*)(a))[1] & 0xf) == 0x1)) |
| |
| #define IN6_IS_ADDR_MC_LINKLOCAL(a) \ |
| (IN6_IS_ADDR_MULTICAST(a) && ((((u_int8_t*)(a))[1] & 0xf) == 0x2)) |
| |
| #define IN6_IS_ADDR_MC_SITELOCAL(a) \ |
| (IN6_IS_ADDR_MULTICAST(a) && ((((u_int8_t*)(a))[1] & 0xf) == 0x5)) |
| |
| #define IN6_IS_ADDR_MC_ORGLOCAL(a) \ |
| (IN6_IS_ADDR_MULTICAST(a) && ((((u_int8_t*)(a))[1] & 0xf) == 0x8)) |
| |
| #define IN6_IS_ADDR_MC_GLOBAL(a) \ |
| (IN6_IS_ADDR_MULTICAST(a) && ((((u_int8_t*)(a))[1] & 0xf) == 0xe)) |
| |
| #endif /* __NETINET_IN_H */ |
| |