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#include <asm/byteorder.h> 22#include <linux/version.h> 23 24#ifdef __KERNEL__ 25#include <linux/in.h> 26#include <linux/if_ether.h> 27#include <linux/if.h> 28#include <linux/netdevice.h> 29#include <linux/ppp_channel.h> 30#endif /* __KERNEL__ */ 31 32/* For user-space programs to pick up these definitions 33 * which they wouldn't get otherwise without defining __KERNEL__ 34 */ 35#ifndef AF_PPPOX 36#define AF_PPPOX 24 37#define PF_PPPOX AF_PPPOX 38#endif /* !(AF_PPPOX) */ 39 40/************************************************************************ 41 * PPPoE addressing definition 42 */ 43typedef __u16 sid_t; 44struct pppoe_addr{ 45 sid_t sid; /* Session identifier */ 46 unsigned char remote[ETH_ALEN]; /* Remote address */ 47 char dev[IFNAMSIZ]; /* Local device to use */ 48}; 49 50struct pptp_addr{ 51 __u16 call_id; 52 struct in_addr sin_addr; 53}; 54/************************************************************************ 55 * Protocols supported by AF_PPPOX 56 */ 57#define PX_PROTO_OE 0 /* Currently just PPPoE */ 58#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,22) 59#define PX_PROTO_PPTP 1 60#define PX_MAX_PROTO 2 61#else 62#define PX_PROTO_PPTP 2 63#define PX_MAX_PROTO 3 64#endif 65 66struct sockaddr_pppox { 67 sa_family_t sa_family; /* address family, AF_PPPOX */ 68 unsigned int sa_protocol; /* protocol identifier */ 69 union{ 70 struct pppoe_addr pppoe; 71 struct pptp_addr pptp; 72 }sa_addr; 73}__attribute__ ((packed)); 74 75 76/********************************************************************* 77 * 78 * ioctl interface for defining forwarding of connections 79 * 80 ********************************************************************/ 81 82#define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) 83#define PPPOEIOCDFWD _IO(0xB1 ,1) 84/*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ 85 86/* Codes to identify message types */ 87#define PADI_CODE 0x09 88#define PADO_CODE 0x07 89#define PADR_CODE 0x19 90#define PADS_CODE 0x65 91#define PADT_CODE 0xa7 92struct pppoe_tag { 93 __u16 tag_type; 94 __u16 tag_len; 95 char tag_data[0]; 96} __attribute ((packed)); 97 98/* Tag identifiers */ 99#define PTT_EOL __constant_htons(0x0000) 100#define PTT_SRV_NAME __constant_htons(0x0101) 101#define PTT_AC_NAME __constant_htons(0x0102) 102#define PTT_HOST_UNIQ __constant_htons(0x0103) 103#define PTT_AC_COOKIE __constant_htons(0x0104) 104#define PTT_VENDOR __constant_htons(0x0105) 105#define PTT_RELAY_SID __constant_htons(0x0110) 106#define PTT_SRV_ERR __constant_htons(0x0201) 107#define PTT_SYS_ERR __constant_htons(0x0202) 108#define PTT_GEN_ERR __constant_htons(0x0203) 109 110struct pppoe_hdr { 111#if defined(__LITTLE_ENDIAN_BITFIELD) 112 __u8 ver : 4; 113 __u8 type : 4; 114#elif defined(__BIG_ENDIAN_BITFIELD) 115 __u8 type : 4; 116 __u8 ver : 4; 117#else 118#error "Please fix <asm/byteorder.h>" 119#endif 120 __u8 code; 121 __u16 sid; 122 __u16 length; 123 struct pppoe_tag tag[0]; 124} __attribute__ ((packed)); 125 126 127/* Socket options */ 128#define PPTP_SO_TIMEOUT 1 129 130 131#ifdef __KERNEL__ 132#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0) 133struct pppoe_opt { 134 struct net_device *dev; /* device associated with socket*/ 135 struct pppoe_addr pa; /* what this socket is bound to*/ 136 struct sockaddr_pppox relay; /* what socket data will be 137 relayed to (PPPoE relaying) */ 138}; 139#endif 140struct pptp_opt { 141 struct pptp_addr src_addr; 142 struct pptp_addr dst_addr; 143 __u32 ack_sent, ack_recv; 144 __u32 seq_sent, seq_recv; 145 int ppp_flags; 146}; 147#define PPTP_FLAG_PAUSE 0 148#define PPTP_FLAG_PROC 1 149 150#include <net/sock.h> 151 152struct pppox_sock { 153 /* struct sock must be the first member of pppox_sock */ 154 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 155 struct ppp_channel chan; 156 struct sock *sk; 157 #else 158 struct sock sk; 159 struct ppp_channel chan; 160 #endif 161 struct pppox_sock *next; /* for hash table */ 162 union { 163 struct pppoe_opt pppoe; 164 struct pptp_opt pptp; 165 } proto; 166 unsigned short num; 167}; 168#define pppoe_dev proto.pppoe.dev 169#define pppoe_pa proto.pppoe.pa 170#define pppoe_relay proto.pppoe.relay 171 172static inline struct pppox_sock *pppox_sk(struct sock *sk) 173{ 174 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 175 return (struct pppox_sock *)sk->protinfo.pppox; 176 #else 177 return (struct pppox_sock *)sk; 178 #endif 179} 180 181static inline struct sock *sk_pppox(struct pppox_sock *po) 182{ 183 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 184 return po->sk; 185 #else 186 return (struct sock *)po; 187 #endif 188} 189 190struct module; 191 192struct pppox_proto { 193 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) 194 int (*create)(struct socket *sock); 195 #else 196 int (*create)(struct net *net, struct socket *sock); 197 #endif 198 int (*ioctl)(struct socket *sock, unsigned int cmd, 199 unsigned long arg); 200 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15) 201 struct module *owner; 202 #endif 203}; 204 205extern int register_pppox_proto(int proto_num, struct pppox_proto *pp); 206extern void unregister_pppox_proto(int proto_num); 207extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ 208extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 209 210/* PPPoX socket states */ 211enum { 212 PPPOX_NONE = 0, /* initial state */ 213 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ 214 PPPOX_BOUND = 2, /* bound to ppp device */ 215 PPPOX_RELAY = 4, /* forwarding is enabled */ 216 PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ 217 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ 218}; 219 220#endif /* __KERNEL__ */ 221 222#endif /* !(__LINUX_IF_PPPOX_H) */ 223