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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/***************************************************************************3 * Linux PPP over X - Generic PPP transport layer sockets4 * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) 5 *6 * This file supplies definitions required by the PPP over Ethernet driver7 * (pppox.c). All version information wrt this file is located in pppox.c8 *9 * License:10 * This program is free software; you can redistribute it and/or11 * modify it under the terms of the GNU General Public License12 * as published by the Free Software Foundation; either version13 * 2 of the License, or (at your option) any later version.14 *15 */16 17#ifndef _UAPI__LINUX_IF_PPPOX_H18#define _UAPI__LINUX_IF_PPPOX_H19 20 21#include <linux/types.h>22#include <asm/byteorder.h>23 24#include <linux/socket.h>25#include <linux/if.h>26#include <linux/if_ether.h>27#include <linux/if_pppol2tp.h>28#include <linux/in.h>29#include <linux/in6.h>30 31/* For user-space programs to pick up these definitions32 * which they wouldn't get otherwise without defining __KERNEL__33 */34#ifndef AF_PPPOX35#define AF_PPPOX 2436#define PF_PPPOX AF_PPPOX37#endif /* !(AF_PPPOX) */38 39/************************************************************************ 40 * PPPoE addressing definition 41 */ 42typedef __be16 sid_t;43struct 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 * PPTP addressing definition51 */52struct pptp_addr {53 __u16 call_id;54 struct in_addr sin_addr;55};56 57/************************************************************************58 * Protocols supported by AF_PPPOX59 */60#define PX_PROTO_OE 0 /* Currently just PPPoE */61#define PX_PROTO_OL2TP 1 /* Now L2TP also */62#define PX_PROTO_PPTP 263#define PX_MAX_PROTO 364 65struct sockaddr_pppox {66 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */67 unsigned int sa_protocol; /* protocol identifier */68 union {69 struct pppoe_addr pppoe;70 struct pptp_addr pptp;71 } sa_addr;72} __packed;73 74/* The use of the above union isn't viable because the size of this75 * struct must stay fixed over time -- applications use sizeof(struct76 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr77 * type instead.78 */79struct sockaddr_pppol2tp {80 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */81 unsigned int sa_protocol; /* protocol identifier */82 struct pppol2tp_addr pppol2tp;83} __packed;84 85struct sockaddr_pppol2tpin6 {86 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */87 unsigned int sa_protocol; /* protocol identifier */88 struct pppol2tpin6_addr pppol2tp;89} __packed;90 91/* The L2TPv3 protocol changes tunnel and session ids from 16 to 3292 * bits. So we need a different sockaddr structure.93 */94struct sockaddr_pppol2tpv3 {95 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */96 unsigned int sa_protocol; /* protocol identifier */97 struct pppol2tpv3_addr pppol2tp;98} __packed;99 100struct sockaddr_pppol2tpv3in6 {101 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */102 unsigned int sa_protocol; /* protocol identifier */103 struct pppol2tpv3in6_addr pppol2tp;104} __packed;105 106/*********************************************************************107 *108 * ioctl interface for defining forwarding of connections109 *110 ********************************************************************/111 112#define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t)113#define PPPOEIOCDFWD _IO(0xB1 ,1)114/*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/115 116/* Codes to identify message types */117#define PADI_CODE 0x09118#define PADO_CODE 0x07119#define PADR_CODE 0x19120#define PADS_CODE 0x65121#define PADT_CODE 0xa7122struct pppoe_tag {123 __be16 tag_type;124 __be16 tag_len;125 char tag_data[];126} __attribute__ ((packed));127 128/* Tag identifiers */129#define PTT_EOL __cpu_to_be16(0x0000)130#define PTT_SRV_NAME __cpu_to_be16(0x0101)131#define PTT_AC_NAME __cpu_to_be16(0x0102)132#define PTT_HOST_UNIQ __cpu_to_be16(0x0103)133#define PTT_AC_COOKIE __cpu_to_be16(0x0104)134#define PTT_VENDOR __cpu_to_be16(0x0105)135#define PTT_RELAY_SID __cpu_to_be16(0x0110)136#define PTT_SRV_ERR __cpu_to_be16(0x0201)137#define PTT_SYS_ERR __cpu_to_be16(0x0202)138#define PTT_GEN_ERR __cpu_to_be16(0x0203)139 140struct pppoe_hdr {141#if defined(__LITTLE_ENDIAN_BITFIELD)142 __u8 type : 4;143 __u8 ver : 4;144#elif defined(__BIG_ENDIAN_BITFIELD)145 __u8 ver : 4;146 __u8 type : 4;147#else148#error "Please fix <asm/byteorder.h>"149#endif150 __u8 code;151 __be16 sid;152 __be16 length;153 struct pppoe_tag tag[];154} __packed;155 156/* Length of entire PPPoE + PPP header */157#define PPPOE_SES_HLEN 8158 159 160#endif /* _UAPI__LINUX_IF_PPPOX_H */161