6f30e1867c
Otherwise we can potentially try to dereference a NULL device pointer in some cases. Signed-off-by: David S. Miller <davem@davemloft.net>
176 lines
5.1 KiB
C
176 lines
5.1 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));
|
|
|
|
#ifdef __KERNEL__
|
|
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) */
|