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 __LINUX_IF_PPPOX_H 17 #define __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 __be16 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 } __attribute__((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 } __attribute__((packed)); 80 81 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 82 * bits. So we need a different sockaddr structure. 83 */ 84 struct sockaddr_pppol2tpv3 { 85 __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ 86 unsigned int sa_protocol; /* protocol identifier */ 87 struct pppol2tpv3_addr pppol2tp; 88 } __attribute__((packed)); 89 90 /********************************************************************* 91 * 92 * ioctl interface for defining forwarding of connections 93 * 94 ********************************************************************/ 95 96 #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) 97 #define PPPOEIOCDFWD _IO(0xB1 ,1) 98 /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ 99 100 /* Codes to identify message types */ 101 #define PADI_CODE 0x09 102 #define PADO_CODE 0x07 103 #define PADR_CODE 0x19 104 #define PADS_CODE 0x65 105 #define PADT_CODE 0xa7 106 struct pppoe_tag { 107 __be16 tag_type; 108 __be16 tag_len; 109 char tag_data[0]; 110 } __attribute__ ((packed)); 111 112 /* Tag identifiers */ 113 #define PTT_EOL __cpu_to_be16(0x0000) 114 #define PTT_SRV_NAME __cpu_to_be16(0x0101) 115 #define PTT_AC_NAME __cpu_to_be16(0x0102) 116 #define PTT_HOST_UNIQ __cpu_to_be16(0x0103) 117 #define PTT_AC_COOKIE __cpu_to_be16(0x0104) 118 #define PTT_VENDOR __cpu_to_be16(0x0105) 119 #define PTT_RELAY_SID __cpu_to_be16(0x0110) 120 #define PTT_SRV_ERR __cpu_to_be16(0x0201) 121 #define PTT_SYS_ERR __cpu_to_be16(0x0202) 122 #define PTT_GEN_ERR __cpu_to_be16(0x0203) 123 124 struct pppoe_hdr { 125 #if defined(__LITTLE_ENDIAN_BITFIELD) 126 __u8 ver : 4; 127 __u8 type : 4; 128 #elif defined(__BIG_ENDIAN_BITFIELD) 129 __u8 type : 4; 130 __u8 ver : 4; 131 #else 132 #error "Please fix <asm/byteorder.h>" 133 #endif 134 __u8 code; 135 __be16 sid; 136 __be16 length; 137 struct pppoe_tag tag[0]; 138 } __attribute__((packed)); 139 140 /* Length of entire PPPoE + PPP header */ 141 #define PPPOE_SES_HLEN 8 142 143 144 #endif /* !(__LINUX_IF_PPPOX_H) */ 145
