/* 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 */