diff options
Diffstat (limited to 'include/linux/if_pppox.h')
| -rw-r--r-- | include/linux/if_pppox.h | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/include/linux/if_pppox.h b/include/linux/if_pppox.h new file mode 100644 index 00000000..999ccd3f --- /dev/null +++ b/include/linux/if_pppox.h @@ -0,0 +1,249 @@ +/*************************************************************************** + * 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> + +#ifdef __KERNEL__ +#include <linux/if_ether.h> +#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 { + 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 { + 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 { + 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; + __u32 recv_sequence; + __u32 xmit_sequence; + atomic_t sequencing; + int (*backlog_rcv)(struct sock *sk_udp, struct sk_buff *skb); +}; + +struct pppopns_opt { + __u16 local; + __u16 remote; + __u32 recv_sequence; + __u32 xmit_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) */ |