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 #include <linux/if_pppol2tp.h> 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 */ 43 typedef __be16 sid_t; 44 struct 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 50 /************************************************************************ 51 * Protocols supported by AF_PPPOX 52 */ 53 #define PX_PROTO_OE 0 /* Currently just PPPoE */ 54 #define PX_PROTO_OL2TP 1 /* Now L2TP also */ 55 #define PX_MAX_PROTO 2 56 57 struct sockaddr_pppox { 58 sa_family_t sa_family; /* address family, AF_PPPOX */ 59 unsigned int sa_protocol; /* protocol identifier */ 60 union{ 61 struct pppoe_addr pppoe; 62 }sa_addr; 63 }__attribute__ ((packed)); 64 65 /* The use of the above union isn't viable because the size of this 66 * struct must stay fixed over time -- applications use sizeof(struct 67 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr 68 * type instead. 69 */ 70 struct sockaddr_pppol2tp { 71 sa_family_t sa_family; /* address family, AF_PPPOX */ 72 unsigned int sa_protocol; /* protocol identifier */ 73 struct pppol2tp_addr pppol2tp; 74 }__attribute__ ((packed)); 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 92 struct pppoe_tag { 93 __be16 tag_type; 94 __be16 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) 109 110 struct 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 __be16 sid; 122 __be16 length; 123 struct pppoe_tag tag[0]; 124 } __attribute__ ((packed)); 125 126 /* Length of entire PPPoE + PPP header */ 127 #define PPPOE_SES_HLEN 8 128 129 #ifdef __KERNEL__ 130 #include <linux/skbuff.h> 131 132 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) 133 { 134 return (struct pppoe_hdr *)skb_network_header(skb); 135 } 136 137 struct pppoe_opt { 138 struct net_device *dev; /* device associated with socket*/ 139 int ifindex; /* ifindex of device associated with socket */ 140 struct pppoe_addr pa; /* what this socket is bound to*/ 141 struct sockaddr_pppox relay; /* what socket data will be 142 relayed to (PPPoE relaying) */ 143 }; 144 145 #include <net/sock.h> 146 147 struct pppox_sock { 148 /* struct sock must be the first member of pppox_sock */ 149 struct sock sk; 150 struct ppp_channel chan; 151 struct pppox_sock *next; /* for hash table */ 152 union { 153 struct pppoe_opt pppoe; 154 } proto; 155 __be16 num; 156 }; 157 #define pppoe_dev proto.pppoe.dev 158 #define pppoe_ifindex proto.pppoe.ifindex 159 #define pppoe_pa proto.pppoe.pa 160 #define pppoe_relay proto.pppoe.relay 161 162 static inline struct pppox_sock *pppox_sk(struct sock *sk) 163 { 164 return (struct pppox_sock *)sk; 165 } 166 167 static inline struct sock *sk_pppox(struct pppox_sock *po) 168 { 169 return (struct sock *)po; 170 } 171 172 struct module; 173 174 struct pppox_proto { 175 int (*create)(struct net *net, struct socket *sock); 176 int (*ioctl)(struct socket *sock, unsigned int cmd, 177 unsigned long arg); 178 struct module *owner; 179 }; 180 181 extern int register_pppox_proto(int proto_num, struct pppox_proto *pp); 182 extern void unregister_pppox_proto(int proto_num); 183 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ 184 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 185 186 /* PPPoX socket states */ 187 enum { 188 PPPOX_NONE = 0, /* initial state */ 189 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ 190 PPPOX_BOUND = 2, /* bound to ppp device */ 191 PPPOX_RELAY = 4, /* forwarding is enabled */ 192 PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ 193 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ 194 }; 195 196 #endif /* __KERNEL__ */ 197 198 #endif /* !(__LINUX_IF_PPPOX_H) */ 199