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422 giacomo 1
/*
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 * INET         An implementation of the TCP/IP protocol suite for the LINUX
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 *              operating system.  INET is implemented using the  BSD Socket
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 *              interface as the means of communication with the user level.
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 *
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 *              Definitions of the Internet Protocol.
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 *
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 * Version:     @(#)in.h        1.0.1   04/21/93
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 *
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 * Authors:     Original taken from the GNU Project <netinet/in.h> file.
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 *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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 *
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 *              This program is free software; you can redistribute it and/or
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 *              modify it under the terms of the GNU General Public License
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 *              as published by the Free Software Foundation; either version
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 *              2 of the License, or (at your option) any later version.
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 */
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#ifndef _LINUX_IN_H
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#define _LINUX_IN_H
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#include <linux/types.h>
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#include <linux/socket.h>
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/* Standard well-defined IP protocols.  */
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enum {
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  IPPROTO_IP = 0,               /* Dummy protocol for TCP               */
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  IPPROTO_ICMP = 1,             /* Internet Control Message Protocol    */
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  IPPROTO_IGMP = 2,             /* Internet Group Management Protocol   */
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  IPPROTO_IPIP = 4,             /* IPIP tunnels (older KA9Q tunnels use 94) */
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  IPPROTO_TCP = 6,              /* Transmission Control Protocol        */
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  IPPROTO_EGP = 8,              /* Exterior Gateway Protocol            */
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  IPPROTO_PUP = 12,             /* PUP protocol                         */
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  IPPROTO_UDP = 17,             /* User Datagram Protocol               */
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  IPPROTO_IDP = 22,             /* XNS IDP protocol                     */
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  IPPROTO_RSVP = 46,            /* RSVP protocol                        */
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  IPPROTO_GRE = 47,             /* Cisco GRE tunnels (rfc 1701,1702)    */
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  IPPROTO_IPV6   = 41,          /* IPv6-in-IPv4 tunnelling              */
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  IPPROTO_ESP = 50,            /* Encapsulation Security Payload protocol */
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  IPPROTO_AH = 51,             /* Authentication Header protocol       */
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  IPPROTO_PIM    = 103,         /* Protocol Independent Multicast       */
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  IPPROTO_COMP   = 108,                /* Compression Header protocol */
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  IPPROTO_SCTP   = 132,         /* Stream Control Transport Protocol    */
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  IPPROTO_RAW    = 255,         /* Raw IP packets                       */
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  IPPROTO_MAX
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};
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/* Internet address. */
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struct in_addr {
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        __u32   s_addr;
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};
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#define IP_TOS          1
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#define IP_TTL          2
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#define IP_HDRINCL      3
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#define IP_OPTIONS      4
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#define IP_ROUTER_ALERT 5
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#define IP_RECVOPTS     6
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#define IP_RETOPTS      7
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#define IP_PKTINFO      8
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#define IP_PKTOPTIONS   9
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#define IP_MTU_DISCOVER 10
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#define IP_RECVERR      11
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#define IP_RECVTTL      12
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#define IP_RECVTOS      13
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#define IP_MTU          14
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#define IP_FREEBIND     15
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#define IP_IPSEC_POLICY 16
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#define IP_XFRM_POLICY  17
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/* BSD compatibility */
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#define IP_RECVRETOPTS  IP_RETOPTS
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/* IP_MTU_DISCOVER values */
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#define IP_PMTUDISC_DONT                0       /* Never send DF frames */
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#define IP_PMTUDISC_WANT                1       /* Use per route hints  */
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#define IP_PMTUDISC_DO                  2       /* Always DF            */
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#define IP_MULTICAST_IF                 32
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#define IP_MULTICAST_TTL                33
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#define IP_MULTICAST_LOOP               34
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#define IP_ADD_MEMBERSHIP               35
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#define IP_DROP_MEMBERSHIP              36
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#define IP_UNBLOCK_SOURCE               37
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#define IP_BLOCK_SOURCE                 38
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#define IP_ADD_SOURCE_MEMBERSHIP        39
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#define IP_DROP_SOURCE_MEMBERSHIP       40
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#define IP_MSFILTER                     41
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#define MCAST_JOIN_GROUP                42
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#define MCAST_BLOCK_SOURCE              43
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#define MCAST_UNBLOCK_SOURCE            44
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#define MCAST_LEAVE_GROUP               45
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#define MCAST_JOIN_SOURCE_GROUP         46
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#define MCAST_LEAVE_SOURCE_GROUP        47
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#define MCAST_MSFILTER                  48
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#define MCAST_EXCLUDE   0
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#define MCAST_INCLUDE   1
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/* These need to appear somewhere around here */
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#define IP_DEFAULT_MULTICAST_TTL        1
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#define IP_DEFAULT_MULTICAST_LOOP       1
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/* Request struct for multicast socket ops */
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struct ip_mreq
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{
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        struct in_addr imr_multiaddr;   /* IP multicast address of group */
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        struct in_addr imr_interface;   /* local IP address of interface */
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};
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struct ip_mreqn
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{
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        struct in_addr  imr_multiaddr;          /* IP multicast address of group */
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        struct in_addr  imr_address;            /* local IP address of interface */
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        int             imr_ifindex;            /* Interface index */
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};
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struct ip_mreq_source {
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        __u32           imr_multiaddr;
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        __u32           imr_interface;
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        __u32           imr_sourceaddr;
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};
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struct ip_msfilter {
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        __u32           imsf_multiaddr;
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        __u32           imsf_interface;
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        __u32           imsf_fmode;
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        __u32           imsf_numsrc;
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        __u32           imsf_slist[1];
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};
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#define IP_MSFILTER_SIZE(numsrc) \
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        (sizeof(struct ip_msfilter) - sizeof(__u32) \
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        + (numsrc) * sizeof(__u32))
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struct group_req
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{
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        __u32                            gr_interface;  /* interface index */
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        struct __kernel_sockaddr_storage gr_group;      /* group address */
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};
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struct group_source_req
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{
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        __u32                            gsr_interface; /* interface index */
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        struct __kernel_sockaddr_storage gsr_group;     /* group address */
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        struct __kernel_sockaddr_storage gsr_source;    /* source address */
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};
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struct group_filter
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{
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        __u32                            gf_interface;  /* interface index */
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        struct __kernel_sockaddr_storage gf_group;      /* multicast address */
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        __u32                            gf_fmode;      /* filter mode */
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        __u32                            gf_numsrc;     /* number of sources */
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        struct __kernel_sockaddr_storage gf_slist[1];   /* interface index */
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};
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#define GROUP_FILTER_SIZE(numsrc) \
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        (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
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        + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
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struct in_pktinfo
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{
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        int             ipi_ifindex;
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        struct in_addr  ipi_spec_dst;
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        struct in_addr  ipi_addr;
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};
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/* Structure describing an Internet (IP) socket address. */
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#define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
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struct sockaddr_in {
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  sa_family_t           sin_family;     /* Address family               */
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  unsigned short int    sin_port;       /* Port number                  */
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  struct in_addr        sin_addr;       /* Internet address             */
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  /* Pad to size of `struct sockaddr'. */
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  unsigned char         __pad[__SOCK_SIZE__ - sizeof(short int) -
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                        sizeof(unsigned short int) - sizeof(struct in_addr)];
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};
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#define sin_zero        __pad           /* for BSD UNIX comp. -FvK      */
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/*
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 * Definitions of the bits in an Internet address integer.
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 * On subnets, host and network parts are found according
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 * to the subnet mask, not these masks.
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 */
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#define IN_CLASSA(a)            ((((long int) (a)) & 0x80000000) == 0)
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#define IN_CLASSA_NET           0xff000000
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#define IN_CLASSA_NSHIFT        24
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#define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
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#define IN_CLASSA_MAX           128
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#define IN_CLASSB(a)            ((((long int) (a)) & 0xc0000000) == 0x80000000)
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#define IN_CLASSB_NET           0xffff0000
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#define IN_CLASSB_NSHIFT        16
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#define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
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#define IN_CLASSB_MAX           65536
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#define IN_CLASSC(a)            ((((long int) (a)) & 0xe0000000) == 0xc0000000)
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#define IN_CLASSC_NET           0xffffff00
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#define IN_CLASSC_NSHIFT        8
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#define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
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#define IN_CLASSD(a)            ((((long int) (a)) & 0xf0000000) == 0xe0000000)
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#define IN_MULTICAST(a)         IN_CLASSD(a)
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#define IN_MULTICAST_NET        0xF0000000
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#define IN_EXPERIMENTAL(a)      ((((long int) (a)) & 0xf0000000) == 0xf0000000)
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#define IN_BADCLASS(a)          IN_EXPERIMENTAL((a))
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/* Address to accept any incoming messages. */
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#define INADDR_ANY              ((unsigned long int) 0x00000000)
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/* Address to send to all hosts. */
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#define INADDR_BROADCAST        ((unsigned long int) 0xffffffff)
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/* Address indicating an error return. */
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#define INADDR_NONE             ((unsigned long int) 0xffffffff)
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/* Network number for local host loopback. */
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#define IN_LOOPBACKNET          127
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/* Address to loopback in software to local host.  */
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#define INADDR_LOOPBACK         0x7f000001      /* 127.0.0.1   */
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#define IN_LOOPBACK(a)          ((((long int) (a)) & 0xff000000) == 0x7f000000)
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/* Defines for Multicast INADDR */
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#define INADDR_UNSPEC_GROUP     0xe0000000U     /* 224.0.0.0   */
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#define INADDR_ALLHOSTS_GROUP   0xe0000001U     /* 224.0.0.1   */
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#define INADDR_ALLRTRS_GROUP    0xe0000002U     /* 224.0.0.2 */
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#define INADDR_MAX_LOCAL_GROUP  0xe00000ffU     /* 224.0.0.255 */
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/* <asm/byteorder.h> contains the htonl type stuff.. */
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#include <asm/byteorder.h> 
242
 
243
#ifdef __KERNEL__
244
/* Some random defines to make it easier in the kernel.. */
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#define LOOPBACK(x)     (((x) & htonl(0xff000000)) == htonl(0x7f000000))
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#define MULTICAST(x)    (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
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#define BADCLASS(x)     (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
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#define ZERONET(x)      (((x) & htonl(0xff000000)) == htonl(0x00000000))
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#define LOCAL_MCAST(x)  (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
250
 
251
#endif
252
 
253
#endif  /* _LINUX_IN_H */