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.h> 25 #include <linux/if_ether.h> 26 #include <linux/if_pppol2tp.h> 27 28 /* For user-space programs to pick up these definitions 29 * which they wouldn't get otherwise without defining __KERNEL__ 30 */ 31 #ifndef AF_PPPOX 32 #define AF_PPPOX 24 33 #define PF_PPPOX AF_PPPOX 34 #endif /* !(AF_PPPOX) */ 35 36 /************************************************************************ 37 * PPPoE addressing definition 38 */ 39 typedef __be16 sid_t; 40 struct pppoe_addr { 41 sid_t sid; /* Session identifier */ 42 unsigned char remote[ETH_ALEN]; /* Remote address */ 43 char dev[IFNAMSIZ]; /* Local device to use */ 44 }; 45 46 /************************************************************************ 47 * PPTP addressing definition 48 */ 49 struct pptp_addr { 50 __u16 call_id; 51 struct in_addr sin_addr; 52 }; 53 54 /************************************************************************ 55 * Protocols supported by AF_PPPOX 56 */ 57 #define PX_PROTO_OE 0 /* Currently just PPPoE */ 58 #define PX_PROTO_OL2TP 1 /* Now L2TP also */ 59 #define PX_PROTO_PPTP 2 60 #define PX_MAX_PROTO 3 61 62 struct sockaddr_pppox { 63 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 64 unsigned int sa_protocol; /* protocol identifier */ 65 union { 66 struct pppoe_addr pppoe; 67 struct pptp_addr pptp; 68 } sa_addr; 69 } __packed; 70 71 /* The use of the above union isn't viable because the size of this 72 * struct must stay fixed over time -- applications use sizeof(struct 73 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr 74 * type instead. 75 */ 76 struct sockaddr_pppol2tp { 77 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 78 unsigned int sa_protocol; /* protocol identifier */ 79 struct pppol2tp_addr pppol2tp; 80 } __packed; 81 82 struct sockaddr_pppol2tpin6 { 83 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 84 unsigned int sa_protocol; /* protocol identifier */ 85 struct pppol2tpin6_addr pppol2tp; 86 } __packed; 87 88 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 89 * bits. So we need a different sockaddr structure. 90 */ 91 struct sockaddr_pppol2tpv3 { 92 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 93 unsigned int sa_protocol; /* protocol identifier */ 94 struct pppol2tpv3_addr pppol2tp; 95 } __packed; 96 97 struct sockaddr_pppol2tpv3in6 { 98 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 99 unsigned int sa_protocol; /* protocol identifier */ 100 struct pppol2tpv3in6_addr pppol2tp; 101 } __packed; 102 103 /********************************************************************* 104 * 105 * ioctl interface for defining forwarding of connections 106 * 107 ********************************************************************/ 108 109 #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) 110 #define PPPOEIOCDFWD _IO(0xB1 ,1) 111 /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ 112 113 /* Codes to identify message types */ 114 #define PADI_CODE 0x09 115 #define PADO_CODE 0x07 116 #define PADR_CODE 0x19 117 #define PADS_CODE 0x65 118 #define PADT_CODE 0xa7 119 struct pppoe_tag { 120 __be16 tag_type; 121 __be16 tag_len; 122 char tag_data[0]; 123 } __attribute__ ((packed)); 124 125 /* Tag identifiers */ 126 #define PTT_EOL __cpu_to_be16(0x0000) 127 #define PTT_SRV_NAME __cpu_to_be16(0x0101) 128 #define PTT_AC_NAME __cpu_to_be16(0x0102) 129 #define PTT_HOST_UNIQ __cpu_to_be16(0x0103) 130 #define PTT_AC_COOKIE __cpu_to_be16(0x0104) 131 #define PTT_VENDOR __cpu_to_be16(0x0105) 132 #define PTT_RELAY_SID __cpu_to_be16(0x0110) 133 #define PTT_SRV_ERR __cpu_to_be16(0x0201) 134 #define PTT_SYS_ERR __cpu_to_be16(0x0202) 135 #define PTT_GEN_ERR __cpu_to_be16(0x0203) 136 137 struct pppoe_hdr { 138 #if defined(__LITTLE_ENDIAN_BITFIELD) 139 __u8 type : 4; 140 __u8 ver : 4; 141 #elif defined(__BIG_ENDIAN_BITFIELD) 142 __u8 ver : 4; 143 __u8 type : 4; 144 #else 145 #error "Please fix <asm/byteorder.h>" 146 #endif 147 __u8 code; 148 __be16 sid; 149 __be16 length; 150 struct pppoe_tag tag[0]; 151 } __packed; 152 153 /* Length of entire PPPoE + PPP header */ 154 #define PPPOE_SES_HLEN 8 155 156 157 #endif /* _UAPI__LINUX_IF_PPPOX_H */ 158