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.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  */
  41 typedef __be16 sid_t;
  42 struct 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  */
  51 struct 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
  64 struct 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  */
  78 struct 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
  84 struct 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  */
  93 struct 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
  99 struct 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
 121 struct 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
 139 struct 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 */