LXR linux/include/uapi/linux/if

   1/***************************************************************************
   2 * Linux PPP over X - Generic PPP transport layer sockets
   3 * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) 
   4 *
   5 * This file supplies definitions required by the PPP over Ethernet driver
   6 * (pppox.c).  All version information wrt this file is located in pppox.c
   7 *
   8 * License:
   9 *              This program is free software; you can redistribute it and/or
  10 *              modify it under the terms of the GNU General Public License
  11 *              as published by the Free Software Foundation; either version
  12 *              2 of the License, or (at your option) any later version.
  13 *
  14 */
  15
  16#ifndef _UAPI__LINUX_IF_PPPOX_H
  17#define _UAPI__LINUX_IF_PPPOX_H
  18
  19
  20#include <linux/types.h>
  21#include <asm/byteorder.h>
  22
  23#include <linux/socket.h>
  24#include <linux/if.h>
  25#include <linux/if_ether.h>
  26#include <linux/if_pppol2tp.h>
  27#include <linux/in.h>
  28#include <linux/in6.h>
  29
  30/* For user-space programs to pick up these definitions
  31 * which they wouldn't get otherwise without defining __KERNEL__
  32 */
  33#ifndef AF_PPPOX
  34#define AF_PPPOX        24
  35#define PF_PPPOX        AF_PPPOX
  36#endif /* !(AF_PPPOX) */
  37
  38/************************************************************************ 
  39 * PPPoE addressing definition 
  40 */ 
  41typedef __be16 sid_t;
  42struct pppoe_addr {
  43        sid_t         sid;                    /* Session identifier */
  44        unsigned char remote[ETH_ALEN];       /* Remote address */
  45        char          dev[IFNAMSIZ];          /* Local device to use */
  46}; 
  47 
  48/************************************************************************ 
  49 * PPTP addressing definition
  50 */
  51struct pptp_addr {
  52        __u16           call_id;
  53        struct in_addr  sin_addr;
  54};
  55
  56/************************************************************************
  57 * Protocols supported by AF_PPPOX
  58 */
  59#define PX_PROTO_OE    0 /* Currently just PPPoE */
  60#define PX_PROTO_OL2TP 1 /* Now L2TP also */
  61#define PX_PROTO_PPTP  2
  62#define PX_MAX_PROTO   3
  63
  64struct sockaddr_pppox {
  65        __kernel_sa_family_t sa_family;       /* address family, AF_PPPOX */
  66        unsigned int    sa_protocol;          /* protocol identifier */
  67        union {
  68                struct pppoe_addr  pppoe;
  69                struct pptp_addr   pptp;
  70        } sa_addr;
  71} __packed;
  72
  73/* The use of the above union isn't viable because the size of this
  74 * struct must stay fixed over time -- applications use sizeof(struct
  75 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
  76 * type instead.
  77 */
  78struct sockaddr_pppol2tp {
  79        __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
  80        unsigned int    sa_protocol;    /* protocol identifier */
  81        struct pppol2tp_addr pppol2tp;
  82} __packed;
  83
  84struct sockaddr_pppol2tpin6 {
  85        __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
  86        unsigned int    sa_protocol;    /* protocol identifier */
  87        struct pppol2tpin6_addr pppol2tp;
  88} __packed;
  89
  90/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
  91 * bits. So we need a different sockaddr structure.
  92 */
  93struct sockaddr_pppol2tpv3 {
  94        __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
  95        unsigned int    sa_protocol;    /* protocol identifier */
  96        struct pppol2tpv3_addr pppol2tp;
  97} __packed;
  98
  99struct sockaddr_pppol2tpv3in6 {
 100        __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
 101        unsigned int    sa_protocol;    /* protocol identifier */
 102        struct pppol2tpv3in6_addr pppol2tp;
 103} __packed;
 104
 105/*********************************************************************
 106 *
 107 * ioctl interface for defining forwarding of connections
 108 *
 109 ********************************************************************/
 110
 111#define PPPOEIOCSFWD    _IOW(0xB1 ,0, size_t)
 112#define PPPOEIOCDFWD    _IO(0xB1 ,1)
 113/*#define PPPOEIOCGFWD  _IOWR(0xB1,2, size_t)*/
 114
 115/* Codes to identify message types */
 116#define PADI_CODE       0x09
 117#define PADO_CODE       0x07
 118#define PADR_CODE       0x19
 119#define PADS_CODE       0x65
 120#define PADT_CODE       0xa7
 121struct pppoe_tag {
 122        __be16 tag_type;
 123        __be16 tag_len;
 124        char tag_data[0];
 125} __attribute__ ((packed));
 126
 127/* Tag identifiers */
 128#define PTT_EOL         __cpu_to_be16(0x0000)
 129#define PTT_SRV_NAME    __cpu_to_be16(0x0101)
 130#define PTT_AC_NAME     __cpu_to_be16(0x0102)
 131#define PTT_HOST_UNIQ   __cpu_to_be16(0x0103)
 132#define PTT_AC_COOKIE   __cpu_to_be16(0x0104)
 133#define PTT_VENDOR      __cpu_to_be16(0x0105)
 134#define PTT_RELAY_SID   __cpu_to_be16(0x0110)
 135#define PTT_SRV_ERR     __cpu_to_be16(0x0201)
 136#define PTT_SYS_ERR     __cpu_to_be16(0x0202)
 137#define PTT_GEN_ERR     __cpu_to_be16(0x0203)
 138
 139struct pppoe_hdr {
 140#if defined(__LITTLE_ENDIAN_BITFIELD)
 141        __u8 type : 4;
 142        __u8 ver : 4;
 143#elif defined(__BIG_ENDIAN_BITFIELD)
 144        __u8 ver : 4;
 145        __u8 type : 4;
 146#else
 147#error  "Please fix <asm/byteorder.h>"
 148#endif
 149        __u8 code;
 150        __be16 sid;
 151        __be16 length;
 152        struct pppoe_tag tag[0];
 153} __packed;
 154
 155/* Length of entire PPPoE + PPP header */
 156#define PPPOE_SES_HLEN  8
 157
 158
 159#endif /* _UAPI__LINUX_IF_PPPOX_H */
 160