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 24 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) 25 { 26 return (struct pppoe_hdr *)skb_network_header(skb); 27 } 28 29 struct 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 37 struct 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 46 struct 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 62 static inline struct pppox_sock *pppox_sk(struct sock *sk) 63 { 64 return (struct pppox_sock *)sk; 65 } 66 67 static inline struct sock *sk_pppox(struct pppox_sock *po) 68 { 69 return (struct sock *)po; 70 } 71 72 struct module; 73 74 struct 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 81 extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp); 82 extern void unregister_pppox_proto(int proto_num); 83 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ 84 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 85 86 /* PPPoX socket states */ 87 enum { 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