include/uapi/linux/if_pppox.h

   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  */
  38 typedef __be16 sid_t;
  39 struct 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  */
  48 struct pptp_addr {
  49         __u16           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
  61 struct 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  */
  75 struct 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
  81 struct 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  */
  90 struct 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
  96 struct 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
 118 struct 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
 136 struct 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 */