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 _UAPI__LINUX_IF_PPPOX_H 17#define _UAPI__LINUX_IF_PPPOX_H 18 19 20#include <linux/types.h> 21#include <asm/byteorder.h> 22 23#include <linux/socket.h> 24#include <linux/if_ether.h> 25#include <linux/if_pppol2tp.h> 26 27/* For user-space programs to pick up these definitions 28 * which they wouldn't get otherwise without defining __KERNEL__ 29 */ 30#ifndef AF_PPPOX 31#define AF_PPPOX 24 32#define PF_PPPOX AF_PPPOX 33#endif /* !(AF_PPPOX) */ 34 35/************************************************************************ 36 * PPPoE addressing definition 37 */ 38typedef __be16 sid_t; 39struct pppoe_addr { 40 sid_t sid; /* Session identifier */ 41 unsigned char remote[ETH_ALEN]; /* Remote address */ 42 char dev[IFNAMSIZ]; /* Local device to use */ 43}; 44 45/************************************************************************ 46 * PPTP addressing definition 47 */ 48struct pptp_addr { 49 __u16 call_id; 50 struct in_addr sin_addr; 51}; 52 53/************************************************************************ 54 * Protocols supported by AF_PPPOX 55 */ 56#define PX_PROTO_OE 0 /* Currently just PPPoE */ 57#define PX_PROTO_OL2TP 1 /* Now L2TP also */ 58#define PX_PROTO_PPTP 2 59#define PX_MAX_PROTO 3 60 61struct sockaddr_pppox { 62 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 63 unsigned int sa_protocol; /* protocol identifier */ 64 union { 65 struct pppoe_addr pppoe; 66 struct pptp_addr pptp; 67 } sa_addr; 68} __packed; 69 70/* The use of the above union isn't viable because the size of this 71 * struct must stay fixed over time -- applications use sizeof(struct 72 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr 73 * type instead. 74 */ 75struct sockaddr_pppol2tp { 76 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 77 unsigned int sa_protocol; /* protocol identifier */ 78 struct pppol2tp_addr pppol2tp; 79} __packed; 80 81struct sockaddr_pppol2tpin6 { 82 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 83 unsigned int sa_protocol; /* protocol identifier */ 84 struct pppol2tpin6_addr pppol2tp; 85} __packed; 86 87/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 88 * bits. So we need a different sockaddr structure. 89 */ 90struct sockaddr_pppol2tpv3 { 91 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 92 unsigned int sa_protocol; /* protocol identifier */ 93 struct pppol2tpv3_addr pppol2tp; 94} __packed; 95 96struct sockaddr_pppol2tpv3in6 { 97 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 98 unsigned int sa_protocol; /* protocol identifier */ 99 struct pppol2tpv3in6_addr pppol2tp; 100} __packed; 101 102/********************************************************************* 103 * 104 * ioctl interface for defining forwarding of connections 105 * 106 ********************************************************************/ 107 108#define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) 109#define PPPOEIOCDFWD _IO(0xB1 ,1) 110/*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ 111 112/* Codes to identify message types */ 113#define PADI_CODE 0x09 114#define PADO_CODE 0x07 115#define PADR_CODE 0x19 116#define PADS_CODE 0x65 117#define PADT_CODE 0xa7 118struct pppoe_tag { 119 __be16 tag_type; 120 __be16 tag_len; 121 char tag_data[0]; 122} __attribute__ ((packed)); 123 124/* Tag identifiers */ 125#define PTT_EOL __cpu_to_be16(0x0000) 126#define PTT_SRV_NAME __cpu_to_be16(0x0101) 127#define PTT_AC_NAME __cpu_to_be16(0x0102) 128#define PTT_HOST_UNIQ __cpu_to_be16(0x0103) 129#define PTT_AC_COOKIE __cpu_to_be16(0x0104) 130#define PTT_VENDOR __cpu_to_be16(0x0105) 131#define PTT_RELAY_SID __cpu_to_be16(0x0110) 132#define PTT_SRV_ERR __cpu_to_be16(0x0201) 133#define PTT_SYS_ERR __cpu_to_be16(0x0202) 134#define PTT_GEN_ERR __cpu_to_be16(0x0203) 135 136struct pppoe_hdr { 137#if defined(__LITTLE_ENDIAN_BITFIELD) 138 __u8 type : 4; 139 __u8 ver : 4; 140#elif defined(__BIG_ENDIAN_BITFIELD) 141 __u8 ver : 4; 142 __u8 type : 4; 143#else 144#error "Please fix <asm/byteorder.h>" 145#endif 146 __u8 code; 147 __be16 sid; 148 __be16 length; 149 struct pppoe_tag tag[0]; 150} __packed; 151 152/* Length of entire PPPoE + PPP header */ 153#define PPPOE_SES_HLEN 8 154 155 156#endif /* _UAPI__LINUX_IF_PPPOX_H */ 157