Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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__ */ |
James Chapman | cf14a4d | 2007-06-27 15:43:43 -0700 | [diff] [blame] | 30 | #include <linux/if_pppol2tp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Al Viro | b963dc1 | 2007-08-23 02:55:33 -0400 | [diff] [blame^] | 43 | typedef __be16 sid_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
James Chapman | cf14a4d | 2007-06-27 15:43:43 -0700 | [diff] [blame] | 54 | #define PX_PROTO_OL2TP 1 /* Now L2TP also */ |
| 55 | #define PX_MAX_PROTO 2 |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
James Chapman | cf14a4d | 2007-06-27 15:43:43 -0700 | [diff] [blame] | 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)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 { |
Al Viro | b963dc1 | 2007-08-23 02:55:33 -0400 | [diff] [blame^] | 93 | __be16 tag_type; |
| 94 | __be16 tag_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Al Viro | b963dc1 | 2007-08-23 02:55:33 -0400 | [diff] [blame^] | 121 | __be16 sid; |
| 122 | __be16 length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | struct pppoe_tag tag[0]; |
| 124 | } __attribute__ ((packed)); |
| 125 | |
Michael Milner | 516299d | 2007-04-12 22:14:23 -0700 | [diff] [blame] | 126 | /* Length of entire PPPoE + PPP header */ |
| 127 | #define PPPOE_SES_HLEN 8 |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | #ifdef __KERNEL__ |
Arnaldo Carvalho de Melo | 797659f | 2007-03-10 15:56:08 -0300 | [diff] [blame] | 130 | #include <linux/skbuff.h> |
| 131 | |
| 132 | static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) |
| 133 | { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 134 | return (struct pppoe_hdr *)skb_network_header(skb); |
Arnaldo Carvalho de Melo | 797659f | 2007-03-10 15:56:08 -0300 | [diff] [blame] | 135 | } |
| 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | struct pppoe_opt { |
| 138 | struct net_device *dev; /* device associated with socket*/ |
Florian Zumbiehl | 6f30e18 | 2007-03-04 16:03:22 -0800 | [diff] [blame] | 139 | int ifindex; /* ifindex of device associated with socket */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Al Viro | b963dc1 | 2007-08-23 02:55:33 -0400 | [diff] [blame^] | 155 | __be16 num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | }; |
| 157 | #define pppoe_dev proto.pppoe.dev |
Florian Zumbiehl | 6f30e18 | 2007-03-04 16:03:22 -0800 | [diff] [blame] | 158 | #define pppoe_ifindex proto.pppoe.ifindex |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 175 | int (*create)(struct net *net, struct socket *sock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
David S. Miller | 17ba15f | 2005-12-27 20:57:40 -0800 | [diff] [blame] | 184 | extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) */ |