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kernel-ark/include/linux/if_pppox.h
Eric W. Biederman 1b8d7ae42d [NET]: Make socket creation namespace safe. 
This patch passes in the namespace a new socket should be created in
and has the socket code do the appropriate reference counting.  By
virtue of this all socket create methods are touched.  In addition
the socket create methods are modified so that they will fail if
you attempt to create a socket in a non-default network namespace.

Failing if we attempt to create a socket outside of the default
network namespace ensures that as we incrementally make the network stack
network namespace aware we will not export functionality that someone
has not audited and made certain is network namespace safe.
Allowing us to partially enable network namespaces before all of the
exotic protocols are supported.

Any protocol layers I have missed will fail to compile because I now
pass an extra parameter into the socket creation code.

[ Integrated AF_IUCV build fixes from Andrew Morton... -DaveM ]

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:49:07 -07:00

199 lines
5.8 KiB
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/***************************************************************************
* 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__ */
#include <linux/if_pppol2tp.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 __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_PROTO_OL2TP 1 /* Now L2TP also */
#define PX_MAX_PROTO 2
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));
/* 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));
/*********************************************************************
*
* 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 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, 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) */
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