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linux-next/include/uapi/linux/if_pppox.h
Greg Kroah-Hartman e2be04c7f9 License cleanup: add SPDX license identifier to uapi header files with a license 
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be.  This makes it hard for
compliance tools to determine the correct license.

Update these files with an SPDX license identifier.  The identifier was
chosen based on the license information in the file.

GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.

Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier.  The format
is:
        ((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)

SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text.  The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:20:11 +01:00

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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 _UAPI__LINUX_IF_PPPOX_H
#define _UAPI__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;
} __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;
} __packed;
struct sockaddr_pppol2tpin6 {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
struct pppol2tpin6_addr pppol2tp;
} __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;
} __packed;
struct sockaddr_pppol2tpv3in6 {
__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
struct pppol2tpv3in6_addr pppol2tp;
} __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];
} __packed;
/* Length of entire PPPoE + PPP header */
#define PPPOE_SES_HLEN 8
#endif /* _UAPI__LINUX_IF_PPPOX_H */
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