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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/***************************************************************************
* Linux PPP over X - Generic PPP transport layer sockets
* Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516)
*
* This file supplies definitions required by the PPP over Ethernet driver
* (pppox.c). All version information wrt this file is located in pppox.c
*
* License:
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#ifndef __LINUX_IF_PPPOX_H
#define __LINUX_IF_PPPOX_H
#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/socket.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_pppol2tp.h>
#include <linux/in.h>
#include <linux/in6.h>
/* For user-space programs to pick up these definitions
* which they wouldn't get otherwise without defining __KERNEL__
*/
#ifndef AF_PPPOX
#define AF_PPPOX 24
#define PF_PPPOX AF_PPPOX
#endif /* !(AF_PPPOX) */
/************************************************************************
* PPPoE addressing definition
*/
typedef __be16 sid_t;
struct pppoe_addr {
sid_t sid; /* Session identifier */
unsigned char remote[ETH_ALEN]; /* Remote address */
char dev[IFNAMSIZ]; /* Local device to use */
};
/************************************************************************
* PPTP addressing definition
*/
struct pptp_addr {
__u16 call_id;
struct in_addr sin_addr;
};
/************************************************************************
* Protocols supported by AF_PPPOX
*/
#define PX_PROTO_OE 0 /* Currently just PPPoE */
#define PX_PROTO_OL2TP 1 /* Now L2TP also */
#define PX_PROTO_PPTP 2
#define PX_MAX_PROTO 3
struct sockaddr_pppox {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
union {
struct pppoe_addr pppoe;
struct pptp_addr pptp;
} sa_addr;
} __attribute__((packed));
/* The use of the above union isn't viable because the size of this
* struct must stay fixed over time -- applications use sizeof(struct
* sockaddr_pppox) to fill it. We use a protocol specific sockaddr
* type instead.
*/
struct sockaddr_pppol2tp {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
struct pppol2tp_addr pppol2tp;
} __attribute__((packed));
struct sockaddr_pppol2tpin6 {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
struct pppol2tpin6_addr pppol2tp;
} __attribute__((packed));
/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
* bits. So we need a different sockaddr structure.
*/
struct sockaddr_pppol2tpv3 {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
struct pppol2tpv3_addr pppol2tp;
} __attribute__((packed));
struct sockaddr_pppol2tpv3in6 {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
struct pppol2tpv3in6_addr pppol2tp;
} __attribute__((packed));
/*********************************************************************
*
* ioctl interface for defining forwarding of connections
*
********************************************************************/
#define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t)
#define PPPOEIOCDFWD _IO(0xB1 ,1)
/*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/
/* Codes to identify message types */
#define PADI_CODE 0x09
#define PADO_CODE 0x07
#define PADR_CODE 0x19
#define PADS_CODE 0x65
#define PADT_CODE 0xa7
struct pppoe_tag {
__be16 tag_type;
__be16 tag_len;
char tag_data[0];
} __attribute__ ((packed));
/* Tag identifiers */
#define PTT_EOL __cpu_to_be16(0x0000)
#define PTT_SRV_NAME __cpu_to_be16(0x0101)
#define PTT_AC_NAME __cpu_to_be16(0x0102)
#define PTT_HOST_UNIQ __cpu_to_be16(0x0103)
#define PTT_AC_COOKIE __cpu_to_be16(0x0104)
#define PTT_VENDOR __cpu_to_be16(0x0105)
#define PTT_RELAY_SID __cpu_to_be16(0x0110)
#define PTT_SRV_ERR __cpu_to_be16(0x0201)
#define PTT_SYS_ERR __cpu_to_be16(0x0202)
#define PTT_GEN_ERR __cpu_to_be16(0x0203)
struct pppoe_hdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 type : 4;
__u8 ver : 4;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u8 ver : 4;
__u8 type : 4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
__u8 code;
__be16 sid;
__be16 length;
struct pppoe_tag tag[0];
} __attribute__((packed));
/* Length of entire PPPoE + PPP header */
#define PPPOE_SES_HLEN 8
#endif /* __LINUX_IF_PPPOX_H */