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TOMOYO Linux Cross Reference
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 <linux/workqueue.h>
 23 #include <uapi/linux/if_pppox.h>
 24 
 25 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
 26 {
 27         return (struct pppoe_hdr *)skb_network_header(skb);
 28 }
 29 
 30 struct 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 
 39 struct 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 
 48 struct 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 
 64 static inline struct pppox_sock *pppox_sk(struct sock *sk)
 65 {
 66         return (struct pppox_sock *)sk;
 67 }
 68 
 69 static inline struct sock *sk_pppox(struct pppox_sock *po)
 70 {
 71         return (struct sock *)po;
 72 }
 73 
 74 struct module;
 75 
 76 struct 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 
 83 extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
 84 extern void unregister_pppox_proto(int proto_num);
 85 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
 86 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 87 
 88 /* PPPoX socket states */
 89 enum {
 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 

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