/*************************************************************************** * 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_ether.h>#include <linux/if_pppol2tp.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	0xa7struct 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 */