| /*************************************************************************** |
| * 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_ether.h> |
| #ifdef __KERNEL__ |
| #include <linux/if.h> |
| #include <linux/netdevice.h> |
| #include <linux/ppp_channel.h> |
| #endif /* __KERNEL__ */ |
| #include <linux/if_pppol2tp.h> |
| #include <linux/if_pppolac.h> |
| #include <linux/if_pppopns.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 { |
| __be16 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_PROTO_OLAC 3 |
| #define PX_PROTO_OPNS 4 |
| #define PX_MAX_PROTO 5 |
| |
| 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)); |
| |
| /* 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)); |
| |
| /********************************************************************* |
| * |
| * 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 ver : 4; |
| __u8 type : 4; |
| #elif defined(__BIG_ENDIAN_BITFIELD) |
| __u8 type : 4; |
| __u8 ver : 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 |
| |
| #ifdef __KERNEL__ |
| #include <linux/skbuff.h> |
| |
| static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) |
| { |
| return (struct pppoe_hdr *)skb_network_header(skb); |
| } |
| |
| struct pppoe_opt { |
| struct net_device *dev; /* device associated with socket*/ |
| int ifindex; /* ifindex of device associated with socket */ |
| struct pppoe_addr pa; /* what this socket is bound to*/ |
| struct sockaddr_pppox relay; /* what socket data will be |
| relayed to (PPPoE relaying) */ |
| }; |
| |
| struct pptp_opt { |
| struct pptp_addr src_addr; |
| struct pptp_addr dst_addr; |
| u32 ack_sent, ack_recv; |
| u32 seq_sent, seq_recv; |
| int ppp_flags; |
| }; |
| |
| struct pppolac_opt { |
| __u32 local; |
| __u32 remote; |
| __u16 sequence; |
| __u8 sequencing; |
| int (*backlog_rcv)(struct sock *sk_udp, struct sk_buff *skb); |
| }; |
| |
| struct pppopns_opt { |
| __u16 local; |
| __u16 remote; |
| __u32 sequence; |
| void (*data_ready)(struct sock *sk_raw, int length); |
| int (*backlog_rcv)(struct sock *sk_raw, struct sk_buff *skb); |
| }; |
| |
| #include <net/sock.h> |
| |
| struct pppox_sock { |
| /* struct sock must be the first member of pppox_sock */ |
| struct sock sk; |
| struct ppp_channel chan; |
| struct pppox_sock *next; /* for hash table */ |
| union { |
| struct pppoe_opt pppoe; |
| struct pptp_opt pptp; |
| struct pppolac_opt lac; |
| struct pppopns_opt pns; |
| } proto; |
| __be16 num; |
| }; |
| #define pppoe_dev proto.pppoe.dev |
| #define pppoe_ifindex proto.pppoe.ifindex |
| #define pppoe_pa proto.pppoe.pa |
| #define pppoe_relay proto.pppoe.relay |
| |
| static inline struct pppox_sock *pppox_sk(struct sock *sk) |
| { |
| return (struct pppox_sock *)sk; |
| } |
| |
| static inline struct sock *sk_pppox(struct pppox_sock *po) |
| { |
| return (struct sock *)po; |
| } |
| |
| struct module; |
| |
| struct pppox_proto { |
| int (*create)(struct net *net, struct socket *sock); |
| int (*ioctl)(struct socket *sock, unsigned int cmd, |
| unsigned long arg); |
| struct module *owner; |
| }; |
| |
| extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp); |
| extern void unregister_pppox_proto(int proto_num); |
| extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ |
| extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
| |
| /* PPPoX socket states */ |
| enum { |
| PPPOX_NONE = 0, /* initial state */ |
| PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ |
| PPPOX_BOUND = 2, /* bound to ppp device */ |
| PPPOX_RELAY = 4, /* forwarding is enabled */ |
| PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ |
| PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ |
| }; |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* !(__LINUX_IF_PPPOX_H) */ |