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