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Linux/include/uapi/linux/if_pppox.h

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  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 #include <linux/in.h>
 28 #include <linux/in6.h>
 29 
 30 /* For user-space programs to pick up these definitions
 31  * which they wouldn't get otherwise without defining __KERNEL__
 32  */
 33 #ifndef AF_PPPOX
 34 #define AF_PPPOX        24
 35 #define PF_PPPOX        AF_PPPOX
 36 #endif /* !(AF_PPPOX) */
 37 
 38 /************************************************************************ 
 39  * PPPoE addressing definition 
 40  */ 
 41 typedef __be16 sid_t;
 42 struct pppoe_addr {
 43         sid_t         sid;                    /* Session identifier */
 44         unsigned char remote[ETH_ALEN];       /* Remote address */
 45         char          dev[IFNAMSIZ];          /* Local device to use */
 46 }; 
 47  
 48 /************************************************************************ 
 49  * PPTP addressing definition
 50  */
 51 struct pptp_addr {
 52         __u16           call_id;
 53         struct in_addr  sin_addr;
 54 };
 55 
 56 /************************************************************************
 57  * Protocols supported by AF_PPPOX
 58  */
 59 #define PX_PROTO_OE    0 /* Currently just PPPoE */
 60 #define PX_PROTO_OL2TP 1 /* Now L2TP also */
 61 #define PX_PROTO_PPTP  2
 62 #define PX_MAX_PROTO   3
 63 
 64 struct sockaddr_pppox {
 65         __kernel_sa_family_t sa_family;       /* address family, AF_PPPOX */
 66         unsigned int    sa_protocol;          /* protocol identifier */
 67         union {
 68                 struct pppoe_addr  pppoe;
 69                 struct pptp_addr   pptp;
 70         } sa_addr;
 71 } __packed;
 72 
 73 /* The use of the above union isn't viable because the size of this
 74  * struct must stay fixed over time -- applications use sizeof(struct
 75  * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
 76  * type instead.
 77  */
 78 struct sockaddr_pppol2tp {
 79         __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
 80         unsigned int    sa_protocol;    /* protocol identifier */
 81         struct pppol2tp_addr pppol2tp;
 82 } __packed;
 83 
 84 struct sockaddr_pppol2tpin6 {
 85         __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
 86         unsigned int    sa_protocol;    /* protocol identifier */
 87         struct pppol2tpin6_addr pppol2tp;
 88 } __packed;
 89 
 90 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
 91  * bits. So we need a different sockaddr structure.
 92  */
 93 struct sockaddr_pppol2tpv3 {
 94         __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
 95         unsigned int    sa_protocol;    /* protocol identifier */
 96         struct pppol2tpv3_addr pppol2tp;
 97 } __packed;
 98 
 99 struct sockaddr_pppol2tpv3in6 {
100         __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
101         unsigned int    sa_protocol;    /* protocol identifier */
102         struct pppol2tpv3in6_addr pppol2tp;
103 } __packed;
104 
105 /*********************************************************************
106  *
107  * ioctl interface for defining forwarding of connections
108  *
109  ********************************************************************/
110 
111 #define PPPOEIOCSFWD    _IOW(0xB1 ,0, size_t)
112 #define PPPOEIOCDFWD    _IO(0xB1 ,1)
113 /*#define PPPOEIOCGFWD  _IOWR(0xB1,2, size_t)*/
114 
115 /* Codes to identify message types */
116 #define PADI_CODE       0x09
117 #define PADO_CODE       0x07
118 #define PADR_CODE       0x19
119 #define PADS_CODE       0x65
120 #define PADT_CODE       0xa7
121 struct pppoe_tag {
122         __be16 tag_type;
123         __be16 tag_len;
124         char tag_data[0];
125 } __attribute__ ((packed));
126 
127 /* Tag identifiers */
128 #define PTT_EOL         __cpu_to_be16(0x0000)
129 #define PTT_SRV_NAME    __cpu_to_be16(0x0101)
130 #define PTT_AC_NAME     __cpu_to_be16(0x0102)
131 #define PTT_HOST_UNIQ   __cpu_to_be16(0x0103)
132 #define PTT_AC_COOKIE   __cpu_to_be16(0x0104)
133 #define PTT_VENDOR      __cpu_to_be16(0x0105)
134 #define PTT_RELAY_SID   __cpu_to_be16(0x0110)
135 #define PTT_SRV_ERR     __cpu_to_be16(0x0201)
136 #define PTT_SYS_ERR     __cpu_to_be16(0x0202)
137 #define PTT_GEN_ERR     __cpu_to_be16(0x0203)
138 
139 struct pppoe_hdr {
140 #if defined(__LITTLE_ENDIAN_BITFIELD)
141         __u8 type : 4;
142         __u8 ver : 4;
143 #elif defined(__BIG_ENDIAN_BITFIELD)
144         __u8 ver : 4;
145         __u8 type : 4;
146 #else
147 #error  "Please fix <asm/byteorder.h>"
148 #endif
149         __u8 code;
150         __be16 sid;
151         __be16 length;
152         struct pppoe_tag tag[0];
153 } __packed;
154 
155 /* Length of entire PPPoE + PPP header */
156 #define PPPOE_SES_HLEN  8
157 
158 
159 #endif /* _UAPI__LINUX_IF_PPPOX_H */
160 

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