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+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU C Library; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef _NETINET_IN_H
+
+#define _NETINET_IN_H 1
+#include <features.h>
+
+#include <sys/socket.h>
+
+
+/* Standard well-defined IP protocols. */
+enum
+ {
+ IPPROTO_IP = 0, /* Dummy protocol for TCP. */
+ IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */
+ IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */
+ IPPROTO_TCP = 6, /* Transmission Control Protocol. */
+ IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */
+ IPPROTO_PUP = 12, /* PUP protocol. */
+ IPPROTO_UDP = 17, /* User Datagram Protocol. */
+ IPPROTO_IDP = 22, /* XNS IDP protocol. */
+
+ IPPROTO_RAW = 255, /* Raw IP packets. */
+ IPPROTO_MAX,
+ };
+
+/* Standard well-known ports. */
+enum
+ {
+ IPPORT_ECHO = 7, /* Echo service. */
+ IPPORT_DISCARD = 9, /* Discard transmissions service. */
+ IPPORT_SYSTAT = 11, /* System status service. */
+ IPPORT_DAYTIME = 13, /* Time of day service. */
+ IPPORT_NETSTAT = 15, /* Network status service. */
+ IPPORT_FTP = 21, /* File Transfer Protocol. */
+ IPPORT_TELNET = 23, /* Telnet protocol. */
+ IPPORT_SMTP = 25, /* Simple Mail Transfer Protocol. */
+ IPPORT_TIMESERVER = 37, /* Timeserver service. */
+ IPPORT_NAMESERVER = 42, /* Domain Name Service. */
+ IPPORT_WHOIS = 43, /* Internet Whois service. */
+ IPPORT_MTP = 57,
+
+ IPPORT_TFTP = 69, /* Trivial File Transfer Protocol. */
+ IPPORT_RJE = 77,
+ IPPORT_FINGER = 79, /* Finger service. */
+ IPPORT_TTYLINK = 87,
+ IPPORT_SUPDUP = 95, /* SUPDUP protocol. */
+
+
+ IPPORT_EXECSERVER = 512, /* execd service. */
+ IPPORT_LOGINSERVER = 513, /* rlogind service. */
+ IPPORT_CMDSERVER = 514,
+ IPPORT_EFSSERVER = 520,
+
+ /* UDP ports. */
+ IPPORT_BIFFUDP = 512,
+ IPPORT_WHOSERVER = 513,
+ IPPORT_ROUTESERVER = 520,
+
+ /* Ports less than this value are reserved for privileged processes. */
+ IPPORT_RESERVED = 1024,
+
+ /* Ports greater this value are reserved for (non-privileged) servers. */
+ IPPORT_USERRESERVED = 5000,
+ };
+
+
+/* Link numbers. */
+#define IMPLINK_IP 155
+#define IMPLINK_LOWEXPER 156
+#define IMPLINK_HIGHEXPER 158
+
+
+/* Internet address. */
+struct in_addr
+ {
+ unsigned int s_addr;
+ };
+
+
+/* Definitions of the bits in an Internet address integer.
+
+ On subnets, host and network parts are found according to
+ the subnet mask, not these masks. */
+
+#define IN_CLASSA(a) ((((unsigned) (a)) & 0x80000000) == 0)
+#define IN_CLASSA_NET 0xff000000
+#define IN_CLASSA_NSHIFT 24
+#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
+#define IN_CLASSA_MAX 128
+
+#define IN_CLASSB(a) ((((unsigned) (a)) & 0xc0000000) == 0x80000000)
+#define IN_CLASSB_NET 0xffff0000
+#define IN_CLASSB_NSHIFT 16
+#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
+#define IN_CLASSB_MAX 65536
+
+#define IN_CLASSC(a) ((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
+#define IN_CLASSC_NET 0xffffff00
+#define IN_CLASSC_NSHIFT 8
+#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
+
+#define IN_CLASSD(a) ((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
+#define IN_MULTICAST(a) IN_CLASSD(a)
+
+#define IN_EXPERIMENTAL(a) ((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
+#define IN_BADCLASS(a) ((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
+
+/* Address to accept any incoming messages. */
+#define INADDR_ANY ((unsigned) 0x00000000)
+/* Address to send to all hosts. */
+#define INADDR_BROADCAST ((unsigned) 0xffffffff)
+/* Address indicating an error return. */
+#define INADDR_NONE 0xffffffff
+
+/* Network number for local host loopback. */
+#define IN_LOOPBACKNET 127
+/* Address to loopback in software to local host. */
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK 0x7f000001 /* Internet address 127.0.0.1. */
+#endif
+
+
+/* Get the definition of the macro to define the common sockaddr members. */
+#include <sockaddrcom.h>
+
+
+/* Structure describing an Internet socket address. */
+struct sockaddr_in
+ {
+ __SOCKADDR_COMMON (sin_);
+ unsigned short int sin_port; /* Port number. */
+ struct in_addr sin_addr; /* Internet address. */
+
+ /* Pad to size of `struct sockaddr'. */
+ unsigned char sin_zero[sizeof(struct sockaddr) -
+ __SOCKADDR_COMMON_SIZE -
+ sizeof(unsigned short int) -
+ sizeof(struct in_addr)];
+ };
+
+
+/* Options for use with `getsockopt' and `setsockopt' at the IP level.
+ The first word in the comment at the right is the data type used;
+ "bool" means a boolean value stored in an `int'. */
+#define IP_OPTIONS 1 /* ip_opts; IP per-packet options. */
+#define IP_HDRINCL 2 /* int; Header is included with data. */
+#define IP_TOS 3 /* int; IP type of service and precedence. */
+#define IP_TTL 4 /* int; IP time to live. */
+#define IP_RECVOPTS 5 /* bool; Receive all IP options w/datagram. */
+#define IP_RECVRETOPTS 6 /* bool; Receive IP options for response. */
+#define IP_RECVDSTADDR 7 /* bool; Receive IP dst addr w/datagram. */
+#define IP_RETOPTS 8 /* ip_opts; Set/get IP per-packet options. */
+#define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */
+#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */
+#define IP_MULTICAST_LOOP 11 /* i_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 */
+
+/* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
+ The `ip_dst' field 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; zero without source route. */
+ char ip_opts[40]; /* Actually variable in size. */
+ };
+
+/* Structure used 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 */
+};
+
+/* Functions to convert between host and network byte order. */
+
+extern unsigned long int ntohl __P ((unsigned long int));
+extern unsigned short int ntohs __P ((unsigned short int));
+extern unsigned long int htonl __P ((unsigned long int));
+extern unsigned short int htons __P ((unsigned short int));
+
+#include <endian.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+/* The host byte order is the same as network byte order,
+ so these functions are all just identity. */
+#define ntohl(x) (x)
+#define ntohs(x) (x)
+#define htonl(x) (x)
+#define htons(x) (x)
+#endif
+
+#endif /* netinet/in.h */