in.h
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上传日期:2013-04-10
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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * Definitions of the Internet Protocol.
- *
- * Version: @(#)in.h 1.0.1 04/21/93
- *
- * Authors: Original taken from the GNU Project <netinet/in.h> file.
- * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- *
- * This program 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 of the License, or (at your option) any later version.
- */
- #ifndef _LINUX_IN_H
- #define _LINUX_IN_H
- #include <linux/types.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_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
- 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_RSVP = 46, /* RSVP protocol */
- IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
- IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
- IPPROTO_PIM = 103, /* Protocol Independent Multicast */
- IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
- IPPROTO_AH = 51, /* Authentication Header protocol */
- IPPROTO_COMP = 108, /* Compression Header protocol */
- IPPROTO_RAW = 255, /* Raw IP packets */
- IPPROTO_MAX
- };
- /* Internet address. */
- struct in_addr {
- __u32 s_addr;
- };
- #define IP_TOS 1
- #define IP_TTL 2
- #define IP_HDRINCL 3
- #define IP_OPTIONS 4
- #define IP_ROUTER_ALERT 5
- #define IP_RECVOPTS 6
- #define IP_RETOPTS 7
- #define IP_PKTINFO 8
- #define IP_PKTOPTIONS 9
- #define IP_MTU_DISCOVER 10
- #define IP_RECVERR 11
- #define IP_RECVTTL 12
- #define IP_RECVTOS 13
- #define IP_MTU 14
- #define IP_FREEBIND 15
- /* BSD compatibility */
- #define IP_RECVRETOPTS IP_RETOPTS
- /* IP_MTU_DISCOVER values */
- #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
- #define IP_PMTUDISC_WANT 1 /* Use per route hints */
- #define IP_PMTUDISC_DO 2 /* Always DF */
- #define IP_MULTICAST_IF 32
- #define IP_MULTICAST_TTL 33
- #define IP_MULTICAST_LOOP 34
- #define IP_ADD_MEMBERSHIP 35
- #define IP_DROP_MEMBERSHIP 36
- /* These need to appear somewhere around here */
- #define IP_DEFAULT_MULTICAST_TTL 1
- #define IP_DEFAULT_MULTICAST_LOOP 1
- /* Request struct for multicast socket ops */
- struct ip_mreq
- {
- struct in_addr imr_multiaddr; /* IP multicast address of group */
- struct in_addr imr_interface; /* local IP address of interface */
- };
- struct ip_mreqn
- {
- struct in_addr imr_multiaddr; /* IP multicast address of group */
- struct in_addr imr_address; /* local IP address of interface */
- int imr_ifindex; /* Interface index */
- };
- struct in_pktinfo
- {
- int ipi_ifindex;
- struct in_addr ipi_spec_dst;
- struct in_addr ipi_addr;
- };
- /* Structure describing an Internet (IP) socket address. */
- #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
- struct sockaddr_in {
- sa_family_t sin_family; /* Address family */
- unsigned short int sin_port; /* Port number */
- struct in_addr sin_addr; /* Internet address */
- /* Pad to size of `struct sockaddr'. */
- unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
- sizeof(unsigned short int) - sizeof(struct in_addr)];
- };
- #define sin_zero __pad /* for BSD UNIX comp. -FvK */
- /*
- * 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) ((((long int) (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) ((((long int) (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) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
- #define IN_CLASSC_NET 0xffffff00
- #define IN_CLASSC_NSHIFT 8
- #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
- #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
- #define IN_MULTICAST(a) IN_CLASSD(a)
- #define IN_MULTICAST_NET 0xF0000000
- #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
- #define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
- /* Address to accept any incoming messages. */
- #define INADDR_ANY ((unsigned long int) 0x00000000)
- /* Address to send to all hosts. */
- #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
- /* Address indicating an error return. */
- #define INADDR_NONE ((unsigned long int) 0xffffffff)
- /* Network number for local host loopback. */
- #define IN_LOOPBACKNET 127
- /* Address to loopback in software to local host. */
- #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
- #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
- /* Defines for Multicast INADDR */
- #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
- #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
- #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
- #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
- /* <asm/byteorder.h> contains the htonl type stuff.. */
- #include <asm/byteorder.h>
- #ifdef __KERNEL__
- /* Some random defines to make it easier in the kernel.. */
- #define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
- #define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
- #define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
- #define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000))
- #define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
- #endif
- #endif /* _LINUX_IN_H */