1 /*************************************************************************** 2 * Linux PPP over X - Generic PPP transport layer sockets 3 * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) 4 * 5 * This file supplies definitions required by the PPP over Ethernet driver 6 * (pppox.c). All version information wrt this file is located in pppox.c 7 * 8 * License: 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 * 14 */ 15 16 #ifndef _UAPI__LINUX_IF_PPPOX_H 17 #define _UAPI__LINUX_IF_PPPOX_H 18 19 20 #include <linux/types.h> 21 #include <asm/byteorder.h> 22 23 #include <linux/socket.h> 24 #include <linux/if_ether.h> 25 #include <linux/if_pppol2tp.h> 26 27 /* For user-space programs to pick up these definitions 28 * which they wouldn't get otherwise without defining __KERNEL__ 29 */ 30 #ifndef AF_PPPOX 31 #define AF_PPPOX 24 32 #define PF_PPPOX AF_PPPOX 33 #endif /* !(AF_PPPOX) */ 34 35 /************************************************************************ 36 * PPPoE addressing definition 37 */ 38 typedef __be16 sid_t; 39 struct pppoe_addr { 40 sid_t sid; /* Session identifier */ 41 unsigned char remote[ETH_ALEN]; /* Remote address */ 42 char dev[IFNAMSIZ]; /* Local device to use */ 43 }; 44 45 /************************************************************************ 46 * PPTP addressing definition 47 */ 48 struct pptp_addr { 49 __u16 call_id; 50 struct in_addr sin_addr; 51 }; 52 53 /************************************************************************ 54 * Protocols supported by AF_PPPOX 55 */ 56 #define PX_PROTO_OE 0 /* Currently just PPPoE */ 57 #define PX_PROTO_OL2TP 1 /* Now L2TP also */ 58 #define PX_PROTO_PPTP 2 59 #define PX_MAX_PROTO 3 60 61 struct sockaddr_pppox { 62 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 63 unsigned int sa_protocol; /* protocol identifier */ 64 union { 65 struct pppoe_addr pppoe; 66 struct pptp_addr pptp; 67 } sa_addr; 68 } __packed; 69 70 /* The use of the above union isn't viable because the size of this 71 * struct must stay fixed over time -- applications use sizeof(struct 72 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr 73 * type instead. 74 */ 75 struct sockaddr_pppol2tp { 76 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 77 unsigned int sa_protocol; /* protocol identifier */ 78 struct pppol2tp_addr pppol2tp; 79 } __packed; 80 81 struct sockaddr_pppol2tpin6 { 82 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 83 unsigned int sa_protocol; /* protocol identifier */ 84 struct pppol2tpin6_addr pppol2tp; 85 } __packed; 86 87 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 88 * bits. So we need a different sockaddr structure. 89 */ 90 struct sockaddr_pppol2tpv3 { 91 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 92 unsigned int sa_protocol; /* protocol identifier */ 93 struct pppol2tpv3_addr pppol2tp; 94 } __packed; 95 96 struct sockaddr_pppol2tpv3in6 { 97 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 98 unsigned int sa_protocol; /* protocol identifier */ 99 struct pppol2tpv3in6_addr pppol2tp; 100 } __packed; 101 102 /********************************************************************* 103 * 104 * ioctl interface for defining forwarding of connections 105 * 106 ********************************************************************/ 107 108 #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) 109 #define PPPOEIOCDFWD _IO(0xB1 ,1) 110 /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ 111 112 /* Codes to identify message types */ 113 #define PADI_CODE 0x09 114 #define PADO_CODE 0x07 115 #define PADR_CODE 0x19 116 #define PADS_CODE 0x65 117 #define PADT_CODE 0xa7 118 struct pppoe_tag { 119 __be16 tag_type; 120 __be16 tag_len; 121 char tag_data[0]; 122 } __attribute__ ((packed)); 123 124 /* Tag identifiers */ 125 #define PTT_EOL __cpu_to_be16(0x0000) 126 #define PTT_SRV_NAME __cpu_to_be16(0x0101) 127 #define PTT_AC_NAME __cpu_to_be16(0x0102) 128 #define PTT_HOST_UNIQ __cpu_to_be16(0x0103) 129 #define PTT_AC_COOKIE __cpu_to_be16(0x0104) 130 #define PTT_VENDOR __cpu_to_be16(0x0105) 131 #define PTT_RELAY_SID __cpu_to_be16(0x0110) 132 #define PTT_SRV_ERR __cpu_to_be16(0x0201) 133 #define PTT_SYS_ERR __cpu_to_be16(0x0202) 134 #define PTT_GEN_ERR __cpu_to_be16(0x0203) 135 136 struct pppoe_hdr { 137 #if defined(__LITTLE_ENDIAN_BITFIELD) 138 __u8 type : 4; 139 __u8 ver : 4; 140 #elif defined(__BIG_ENDIAN_BITFIELD) 141 __u8 ver : 4; 142 __u8 type : 4; 143 #else 144 #error "Please fix <asm/byteorder.h>" 145 #endif 146 __u8 code; 147 __be16 sid; 148 __be16 length; 149 struct pppoe_tag tag[0]; 150 } __packed; 151 152 /* Length of entire PPPoE + PPP header */ 153 #define PPPOE_SES_HLEN 8 154 155 156 #endif /* _UAPI__LINUX_IF_PPPOX_H */ 157