linux/include/linux/if_pppox.h
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   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#ifndef __LINUX_IF_PPPOX_H
  16#define __LINUX_IF_PPPOX_H
  17
  18#include <linux/if.h>
  19#include <linux/netdevice.h>
  20#include <linux/ppp_channel.h>
  21#include <linux/skbuff.h>
  22#include <uapi/linux/if_pppox.h>
  23
  24static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
  25{
  26        return (struct pppoe_hdr *)skb_network_header(skb);
  27}
  28
  29struct pppoe_opt {
  30        struct net_device      *dev;      /* device associated with socket*/
  31        int                     ifindex;  /* ifindex of device associated with socket */
  32        struct pppoe_addr       pa;       /* what this socket is bound to*/
  33        struct sockaddr_pppox   relay;    /* what socket data will be
  34                                             relayed to (PPPoE relaying) */
  35};
  36
  37struct pptp_opt {
  38        struct pptp_addr src_addr;
  39        struct pptp_addr dst_addr;
  40        u32 ack_sent, ack_recv;
  41        u32 seq_sent, seq_recv;
  42        int ppp_flags;
  43};
  44#include <net/sock.h>
  45
  46struct pppox_sock {
  47        /* struct sock must be the first member of pppox_sock */
  48        struct sock sk;
  49        struct ppp_channel chan;
  50        struct pppox_sock       *next;    /* for hash table */
  51        union {
  52                struct pppoe_opt pppoe;
  53                struct pptp_opt  pptp;
  54        } proto;
  55        __be16                  num;
  56};
  57#define pppoe_dev       proto.pppoe.dev
  58#define pppoe_ifindex   proto.pppoe.ifindex
  59#define pppoe_pa        proto.pppoe.pa
  60#define pppoe_relay     proto.pppoe.relay
  61
  62static inline struct pppox_sock *pppox_sk(struct sock *sk)
  63{
  64        return (struct pppox_sock *)sk;
  65}
  66
  67static inline struct sock *sk_pppox(struct pppox_sock *po)
  68{
  69        return (struct sock *)po;
  70}
  71
  72struct module;
  73
  74struct pppox_proto {
  75        int             (*create)(struct net *net, struct socket *sock);
  76        int             (*ioctl)(struct socket *sock, unsigned int cmd,
  77                                 unsigned long arg);
  78        struct module   *owner;
  79};
  80
  81extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
  82extern void unregister_pppox_proto(int proto_num);
  83extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
  84extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
  85
  86/* PPPoX socket states */
  87enum {
  88    PPPOX_NONE          = 0,  /* initial state */
  89    PPPOX_CONNECTED     = 1,  /* connection established ==TCP_ESTABLISHED */
  90    PPPOX_BOUND         = 2,  /* bound to ppp device */
  91    PPPOX_RELAY         = 4,  /* forwarding is enabled */
  92    PPPOX_ZOMBIE        = 8,  /* dead, but still bound to ppp device */
  93    PPPOX_DEAD          = 16  /* dead, useless, please clean me up!*/
  94};
  95
  96#endif /* !(__LINUX_IF_PPPOX_H) */
  97
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