release/src-rt/linux/linux-2.6/include/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 __LINUX_IF_PPPOX_H
  17 #define __LINUX_IF_PPPOX_H
  18
  19
  20 #include <asm/types.h>
  21 #ifdef __KERNEL__
  22 #include <asm/byteorder.h>
  23 #else
  24 #include <endian.h>
  25 #include <byteswap.h>
  26 #if __BYTE_ORDER == __LITTLE_ENDIAN
  27 #define __LITTLE_ENDIAN_BITFIELD
  28 #elif __BYTE_ORDER == __BIG_ENDIAN
  29 #define __BIG_ENDIAN_BITFIELD
  30 #else
  31 #error "Adjust your <endian.h> defines."
  32 #endif
  33 #endif
  34
  35 #ifdef  __KERNEL__
  36 #include <linux/if_ether.h>
  37 #include <linux/if.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/in.h>
  40 #include <asm/semaphore.h>
  41 #include <linux/ppp_channel.h>
  42 #endif /* __KERNEL__ */
  43 #include <linux/if_pppol2tp.h>
  44
  45 /* For user-space programs to pick up these definitions
  46  * which they wouldn't get otherwise without defining __KERNEL__
  47  */
  48 #ifndef AF_PPPOX
  49 #define AF_PPPOX        24
  50 #define PF_PPPOX        AF_PPPOX
  51 #endif /* !(AF_PPPOX) */
  52
  53 /************************************************************************
  54  * PPPoE addressing definition
  55  */
  56 typedef __be16 sid_t;
  57 struct pppoe_addr{
  58        sid_t           sid;                    /* Session identifier */
  59        unsigned char   remote[ETH_ALEN];       /* Remote address */
  60        char            dev[IFNAMSIZ];          /* Local device to use */
  61 };
  62
  63 struct pptp_addr {
  64        __u16           call_id;
  65        struct in_addr  sin_addr;
  66 };
  67
  68 /************************************************************************
  69  * Protocols supported by AF_PPPOX
  70  */
  71 #define PX_PROTO_OE    0 /* Currently just PPPoE */
  72 #define PX_PROTO_OL2TP 1 /* Now L2TP also */
  73 #define PX_PROTO_PPTP  2
  74 #define PX_MAX_PROTO   3
  75
  76 struct sockaddr_pppox {
  77        sa_family_t     sa_family;            /* address family, AF_PPPOX */
  78        unsigned int    sa_protocol;          /* protocol identifier */
  79        union{
  80                struct pppoe_addr       pppoe;
  81                struct pptp_addr        pptp;
  82        }sa_addr;
  83 }__attribute__ ((packed)); /* deprecated */
  84
  85 /* The use of the above union isn't viable because the size of this
  86  * struct must stay fixed over time -- applications use sizeof(struct
  87  * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
  88  * type instead.
  89  */
  90 struct sockaddr_pppoe {
  91         sa_family_t     sa_family;      /* address family, AF_PPPOX */
  92         unsigned int    sa_protocol;    /* protocol identifier */
  93         struct pppoe_addr pppoe;
  94 }__attribute__ ((packed));
  95
  96 struct sockaddr_pppol2tp {
  97         sa_family_t     sa_family;      /* address family, AF_PPPOX */
  98         unsigned int    sa_protocol;    /* protocol identifier */
  99         struct pppol2tp_addr pppol2tp;
 100 }__attribute__ ((packed));
 101
 102 /* Socket options */
 103 #define PPTP_SO_TIMEOUT 1
 104 #define PPTP_SO_WINDOW  2
 105
 106 /*********************************************************************
 107  *
 108  * ioctl interface for defining forwarding of connections
 109  *
 110  ********************************************************************/
 111
 112 #define PPPOEIOCSFWD    _IOW(0xB1 ,0, size_t)
 113 #define PPPOEIOCDFWD    _IO(0xB1 ,1)
 114 /*#define PPPOEIOCGFWD  _IOWR(0xB1, 2, size_t)*/
 115 #define PPPTPIOWFP      _IOWR(0xB1 ,2, size_t)*/
 116
 117 /* Codes to identify message types */
 118 #define PADI_CODE       0x09
 119 #define PADO_CODE       0x07
 120 #define PADR_CODE       0x19
 121 #define PADS_CODE       0x65
 122 #define PADT_CODE       0xa7
 123 struct pppoe_tag {
 124         __be16 tag_type;
 125         __be16 tag_len;
 126         char tag_data[0];
 127 } __attribute ((packed));
 128
 129 /* Tag identifiers */
 130 #define PTT_EOL         __constant_htons(0x0000)
 131 #define PTT_SRV_NAME    __constant_htons(0x0101)
 132 #define PTT_AC_NAME     __constant_htons(0x0102)
 133 #define PTT_HOST_UNIQ   __constant_htons(0x0103)
 134 #define PTT_AC_COOKIE   __constant_htons(0x0104)
 135 #define PTT_VENDOR      __constant_htons(0x0105)
 136 #define PTT_RELAY_SID   __constant_htons(0x0110)
 137 #define PTT_SRV_ERR     __constant_htons(0x0201)
 138 #define PTT_SYS_ERR     __constant_htons(0x0202)
 139 #define PTT_GEN_ERR     __constant_htons(0x0203)
 140
 141 struct pppoe_hdr {
 142 #if defined(__LITTLE_ENDIAN_BITFIELD)
 143         __u8 ver : 4;
 144         __u8 type : 4;
 145 #elif defined(__BIG_ENDIAN_BITFIELD)
 146         __u8 type : 4;
 147         __u8 ver : 4;
 148 #else
 149 #error  "Please fix <asm/byteorder.h>"
 150 #endif
 151         __u8 code;
 152         __be16 sid;
 153         __be16 length;
 154         struct pppoe_tag tag[0];
 155 } __attribute__ ((packed));
 156
 157 /* Length of entire PPPoE + PPP header */
 158 #define PPPOE_SES_HLEN  8
 159
 160 #ifdef __KERNEL__
 161 #include <linux/skbuff.h>
 162
 163 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
 164 {
 165         return (struct pppoe_hdr *)skb_network_header(skb);
 166 }
 167
 168 struct pppoe_opt {
 169         struct net_device       *dev;     /* device associated with socket*/
 170         int                     ifindex;  /* ifindex of device associated with socket */
 171         struct pppoe_addr       pa;       /* what this socket is bound to*/
 172         struct sockaddr_pppox   relay;    /* what socket data will be
 173                                              relayed to (PPPoE relaying) */
 174 };
 175
 176 struct pptp_opt {
 177         struct pptp_addr        src_addr;
 178         struct pptp_addr        dst_addr;
 179         __u32 ack_sent, ack_recv;
 180         __u32 seq_sent, seq_recv;
 181         int ppp_flags;
 182 };
 183
 184 #define PPTP_FLAG_PAUSE 0
 185 #define PPTP_FLAG_PROC 1
 186
 187 #include <net/sock.h>
 188
 189 struct pppox_sock {
 190         /* struct sock must be the first member of pppox_sock */
 191         struct sock             sk;
 192         struct ppp_channel      chan;
 193         struct pppox_sock       *next;    /* for hash table */
 194         union {
 195                 struct pppoe_opt pppoe;
 196                 struct pptp_opt  pptp;
 197         } proto;
 198         __be16                  num;
 199 };
 200 #define pppoe_dev       proto.pppoe.dev
 201 #define pppoe_ifindex   proto.pppoe.ifindex
 202 #define pppoe_pa        proto.pppoe.pa
 203 #define pppoe_relay     proto.pppoe.relay
 204
 205 static inline struct pppox_sock *pppox_sk(struct sock *sk)
 206 {
 207         return (struct pppox_sock *)sk;
 208 }
 209
 210 static inline struct sock *sk_pppox(struct pppox_sock *po)
 211 {
 212         return (struct sock *)po;
 213 }
 214
 215 struct module;
 216
 217 struct pppox_proto {
 218         int             (*create)(struct socket *sock);
 219         int             (*ioctl)(struct socket *sock, unsigned int cmd,
 220                                  unsigned long arg);
 221         struct module   *owner;
 222 };
 223
 224 extern int register_pppox_proto(int proto_num, struct pppox_proto *pp);
 225 extern void unregister_pppox_proto(int proto_num);
 226 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
 227 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 228
 229 /* PPPoX socket states */
 230 enum {
 231     PPPOX_NONE          = 0,  /* initial state */
 232     PPPOX_CONNECTED     = 1,  /* connection established ==TCP_ESTABLISHED */
 233     PPPOX_BOUND         = 2,  /* bound to ppp device */
 234     PPPOX_RELAY         = 4,  /* forwarding is enabled */
 235     PPPOX_ZOMBIE        = 8,  /* dead, but still bound to ppp device */
 236     PPPOX_DEAD          = 16  /* dead, useless, please clean me up!*/
 237 };
 238
 239 #endif /* __KERNEL__ */
 240
 241 #endif /* !(__LINUX_IF_PPPOX_H) */