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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>

#include <linux/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_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_ESP = 50,            /* Encapsulation Security Payload protocol */

  IPPROTO_AH = 51,             /* Authentication Header protocol       */

  IPPROTO_PIM    = 103,         /* Protocol Independent Multicast       */

  IPPROTO_COMP   = 108,                /* Compression Header protocol */

  IPPROTO_SCTP   = 132,         /* Stream Control Transport 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

#define IP_IPSEC_POLICY 16

#define IP_XFRM_POLICY  17

/* 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

#define IP_UNBLOCK_SOURCE               37

#define IP_BLOCK_SOURCE                 38

#define IP_ADD_SOURCE_MEMBERSHIP        39

#define IP_DROP_SOURCE_MEMBERSHIP       40

#define IP_MSFILTER                     41

#define MCAST_JOIN_GROUP                42

#define MCAST_BLOCK_SOURCE              43

#define MCAST_UNBLOCK_SOURCE            44

#define MCAST_LEAVE_GROUP               45

#define MCAST_JOIN_SOURCE_GROUP         46

#define MCAST_LEAVE_SOURCE_GROUP        47

#define MCAST_MSFILTER                  48

#define MCAST_EXCLUDE   0

#define MCAST_INCLUDE   1

/* 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 ip_mreq_source {

        __u32           imr_multiaddr;

        __u32           imr_interface;

        __u32           imr_sourceaddr;

};

struct ip_msfilter {

        __u32           imsf_multiaddr;

        __u32           imsf_interface;

        __u32           imsf_fmode;

        __u32           imsf_numsrc;

        __u32           imsf_slist[1];

};

#define IP_MSFILTER_SIZE(numsrc) \

        (sizeof(struct ip_msfilter) - sizeof(__u32) \

        + (numsrc) * sizeof(__u32))

struct group_req

{

        __u32                            gr_interface;  /* interface index */

        struct __kernel_sockaddr_storage gr_group;      /* group address */

};

struct group_source_req

{

        __u32                            gsr_interface; /* interface index */

        struct __kernel_sockaddr_storage gsr_group;     /* group address */

        struct __kernel_sockaddr_storage gsr_source;    /* source address */

};

struct group_filter

{

        __u32                            gf_interface;  /* interface index */

        struct __kernel_sockaddr_storage gf_group;      /* multicast address */

        __u32                            gf_fmode;      /* filter mode */

        __u32                            gf_numsrc;     /* number of sources */

        struct __kernel_sockaddr_storage gf_slist[1];   /* interface index */

};

#define GROUP_FILTER_SIZE(numsrc) \

        (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \

        + (numsrc) * sizeof(struct __kernel_sockaddr_storage))

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 */