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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)) |
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#define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t*) (a))[0] == 0xff) |
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#define IN6_IS_ADDR_LINKLOCAL(a) \ |
((((u_int32_t*)(a))[0] & htonl(0xffc00000)) == htonl(0xfe800000)) |
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#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)) |
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#define IN6_IS_ADDR_MC_GLOBAL(a) \ |
(IN6_IS_ADDR_MULTICAST(a) && ((((u_int8_t*)(a))[1] & 0xf) == 0xe)) |
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#endif /* __NETINET_IN_H */ |
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