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