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 <linux/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 <linux/ppp_channel.h> 28 #endif /* __KERNEL__ */ 29 #include <linux/if_pppol2tp.h> 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 __be16 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_PROTO_OL2TP 1 /* Now L2TP also */ 54 #define PX_MAX_PROTO 2 55 56 struct sockaddr_pppox { 57 sa_family_t sa_family; /* address family, AF_PPPOX */ 58 unsigned int sa_protocol; /* protocol identifier */ 59 union{ 60 struct pppoe_addr pppoe; 61 }sa_addr; 62 }__attribute__ ((packed)); 63 64 /* The use of the above union isn't viable because the size of this 65 * struct must stay fixed over time -- applications use sizeof(struct 66 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr 67 * type instead. 68 */ 69 struct sockaddr_pppol2tp { 70 sa_family_t sa_family; /* address family, AF_PPPOX */ 71 unsigned int sa_protocol; /* protocol identifier */ 72 struct pppol2tp_addr pppol2tp; 73 }__attribute__ ((packed)); 74 75 /********************************************************************* 76 * 77 * ioctl interface for defining forwarding of connections 78 * 79 ********************************************************************/ 80 81 #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) 82 #define PPPOEIOCDFWD _IO(0xB1 ,1) 83 /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ 84 85 /* Codes to identify message types */ 86 #define PADI_CODE 0x09 87 #define PADO_CODE 0x07 88 #define PADR_CODE 0x19 89 #define PADS_CODE 0x65 90 #define PADT_CODE 0xa7 91 struct pppoe_tag { 92 __be16 tag_type; 93 __be16 tag_len; 94 char tag_data[0]; 95 } __attribute ((packed)); 96 97 /* Tag identifiers */ 98 #define PTT_EOL __cpu_to_be16(0x0000) 99 #define PTT_SRV_NAME __cpu_to_be16(0x0101) 100 #define PTT_AC_NAME __cpu_to_be16(0x0102) 101 #define PTT_HOST_UNIQ __cpu_to_be16(0x0103) 102 #define PTT_AC_COOKIE __cpu_to_be16(0x0104) 103 #define PTT_VENDOR __cpu_to_be16(0x0105) 104 #define PTT_RELAY_SID __cpu_to_be16(0x0110) 105 #define PTT_SRV_ERR __cpu_to_be16(0x0201) 106 #define PTT_SYS_ERR __cpu_to_be16(0x0202) 107 #define PTT_GEN_ERR __cpu_to_be16(0x0203) 108 109 struct pppoe_hdr { 110 #if defined(__LITTLE_ENDIAN_BITFIELD) 111 __u8 ver : 4; 112 __u8 type : 4; 113 #elif defined(__BIG_ENDIAN_BITFIELD) 114 __u8 type : 4; 115 __u8 ver : 4; 116 #else 117 #error "Please fix <asm/byteorder.h>" 118 #endif 119 __u8 code; 120 __be16 sid; 121 __be16 length; 122 struct pppoe_tag tag[0]; 123 } __attribute__ ((packed)); 124 125 /* Length of entire PPPoE + PPP header */ 126 #define PPPOE_SES_HLEN 8 127 128 #ifdef __KERNEL__ 129 #include <linux/skbuff.h> 130 131 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) 132 { 133 return (struct pppoe_hdr *)skb_network_header(skb); 134 } 135 136 struct pppoe_opt { 137 struct net_device *dev; /* device associated with socket*/ 138 int ifindex; /* ifindex of device associated with socket */ 139 struct pppoe_addr pa; /* what this socket is bound to*/ 140 struct sockaddr_pppox relay; /* what socket data will be 141 relayed to (PPPoE relaying) */ 142 }; 143 144 #include <net/sock.h> 145 146 struct pppox_sock { 147 /* struct sock must be the first member of pppox_sock */ 148 struct sock sk; 149 struct ppp_channel chan; 150 struct pppox_sock *next; /* for hash table */ 151 union { 152 struct pppoe_opt pppoe; 153 } proto; 154 __be16 num; 155 }; 156 #define pppoe_dev proto.pppoe.dev 157 #define pppoe_ifindex proto.pppoe.ifindex 158 #define pppoe_pa proto.pppoe.pa 159 #define pppoe_relay proto.pppoe.relay 160 161 static inline struct pppox_sock *pppox_sk(struct sock *sk) 162 { 163 return (struct pppox_sock *)sk; 164 } 165 166 static inline struct sock *sk_pppox(struct pppox_sock *po) 167 { 168 return (struct sock *)po; 169 } 170 171 struct module; 172 173 struct pppox_proto { 174 int (*create)(struct net *net, struct socket *sock); 175 int (*ioctl)(struct socket *sock, unsigned int cmd, 176 unsigned long arg); 177 struct module *owner; 178 }; 179 180 extern int register_pppox_proto(int proto_num, struct pppox_proto *pp); 181 extern void unregister_pppox_proto(int proto_num); 182 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ 183 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 184 185 /* PPPoX socket states */ 186 enum { 187 PPPOX_NONE = 0, /* initial state */ 188 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ 189 PPPOX_BOUND = 2, /* bound to ppp device */ 190 PPPOX_RELAY = 4, /* forwarding is enabled */ 191 PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ 192 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ 193 }; 194 195 #endif /* __KERNEL__ */ 196 197 #endif /* !(__LINUX_IF_PPPOX_H) */ 198