kernel-ark/include/linux/if_pppox.h
Michael Milner 516299d2f5 [NETFILTER]: bridge-nf: filter bridged IPv4/IPv6 encapsulated in pppoe traffic
The attached patch by Michael Milner adds support for using iptables and
ip6tables on bridged traffic encapsulated in ppoe frames, similar to
what's already supported for vlan.

Signed-off-by: Michael Milner <milner@blissisland.ca>
Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25 22:28:57 -07:00

187 lines
5.3 KiB
C

/***************************************************************************
* 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 <asm/types.h>
#include <asm/byteorder.h>
#ifdef __KERNEL__
#include <linux/if_ether.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <asm/semaphore.h>
#include <linux/ppp_channel.h>
#endif /* __KERNEL__ */
/* 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 __u16 sid_t;
struct pppoe_addr{
sid_t sid; /* Session identifier */
unsigned char remote[ETH_ALEN]; /* Remote address */
char dev[IFNAMSIZ]; /* Local device to use */
};
/************************************************************************
* Protocols supported by AF_PPPOX
*/
#define PX_PROTO_OE 0 /* Currently just PPPoE */
#define PX_MAX_PROTO 1
struct sockaddr_pppox {
sa_family_t sa_family; /* address family, AF_PPPOX */
unsigned int sa_protocol; /* protocol identifier */
union{
struct pppoe_addr pppoe;
}sa_addr;
}__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 {
__u16 tag_type;
__u16 tag_len;
char tag_data[0];
} __attribute ((packed));
/* Tag identifiers */
#define PTT_EOL __constant_htons(0x0000)
#define PTT_SRV_NAME __constant_htons(0x0101)
#define PTT_AC_NAME __constant_htons(0x0102)
#define PTT_HOST_UNIQ __constant_htons(0x0103)
#define PTT_AC_COOKIE __constant_htons(0x0104)
#define PTT_VENDOR __constant_htons(0x0105)
#define PTT_RELAY_SID __constant_htons(0x0110)
#define PTT_SRV_ERR __constant_htons(0x0201)
#define PTT_SYS_ERR __constant_htons(0x0202)
#define PTT_GEN_ERR __constant_htons(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;
__u16 sid;
__u16 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) */
};
#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;
} proto;
unsigned short 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 socket *sock);
int (*ioctl)(struct socket *sock, unsigned int cmd,
unsigned long arg);
struct module *owner;
};
extern int register_pppox_proto(int proto_num, 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) */