LXR linux/include/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#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 <linux/workqueue.h>
  23#include <uapi/linux/if_pppox.h>
  24
  25static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
  26{
  27        return (struct pppoe_hdr *)skb_network_header(skb);
  28}
  29
  30struct pppoe_opt {
  31        struct net_device      *dev;      /* device associated with socket*/
  32        int                     ifindex;  /* ifindex of device associated with socket */
  33        struct pppoe_addr       pa;       /* what this socket is bound to*/
  34        struct sockaddr_pppox   relay;    /* what socket data will be
  35                                             relayed to (PPPoE relaying) */
  36        struct work_struct      padt_work;/* Work item for handling PADT */
  37};
  38
  39struct pptp_opt {
  40        struct pptp_addr src_addr;
  41        struct pptp_addr dst_addr;
  42        u32 ack_sent, ack_recv;
  43        u32 seq_sent, seq_recv;
  44        int ppp_flags;
  45};
  46#include <net/sock.h>
  47
  48struct pppox_sock {
  49        /* struct sock must be the first member of pppox_sock */
  50        struct sock sk;
  51        struct ppp_channel chan;
  52        struct pppox_sock       *next;    /* for hash table */
  53        union {
  54                struct pppoe_opt pppoe;
  55                struct pptp_opt  pptp;
  56        } proto;
  57        __be16                  num;
  58};
  59#define pppoe_dev       proto.pppoe.dev
  60#define pppoe_ifindex   proto.pppoe.ifindex
  61#define pppoe_pa        proto.pppoe.pa
  62#define pppoe_relay     proto.pppoe.relay
  63
  64static inline struct pppox_sock *pppox_sk(struct sock *sk)
  65{
  66        return (struct pppox_sock *)sk;
  67}
  68
  69static inline struct sock *sk_pppox(struct pppox_sock *po)
  70{
  71        return (struct sock *)po;
  72}
  73
  74struct module;
  75
  76struct pppox_proto {
  77        int             (*create)(struct net *net, struct socket *sock, int kern);
  78        int             (*ioctl)(struct socket *sock, unsigned int cmd,
  79                                 unsigned long arg);
  80        struct module   *owner;
  81};
  82
  83extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
  84extern void unregister_pppox_proto(int proto_num);
  85extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
  86extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
  87
  88/* PPPoX socket states */
  89enum {
  90    PPPOX_NONE          = 0,  /* initial state */
  91    PPPOX_CONNECTED     = 1,  /* connection established ==TCP_ESTABLISHED */
  92    PPPOX_BOUND         = 2,  /* bound to ppp device */
  93    PPPOX_RELAY         = 4,  /* forwarding is enabled */
  94    PPPOX_DEAD          = 16  /* dead, useless, please clean me up!*/
  95};
  96
  97#endif /* !(__LINUX_IF_PPPOX_H) */
  98