ipoe: initial implementation of kernel module

1 files changed, 222 insertions, 0 deletions

diff --git a/drivers/pptp/if_pppox.h b/drivers/pptp/if_pppox.h
new file mode 100644
index 0000000..bc05b53
--- /dev/null
+++ b/drivers/pptp/if_pppox.h
@@ -0,0 +1,222 @@
+/***************************************************************************
+ * 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>
+#include <linux/version.h>
+
+#ifdef  __KERNEL__
+#include <linux/in.h>
+#include <linux/if_ether.h>
+#include <linux/if.h>
+#include <linux/netdevice.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 */
+};
+
+struct pptp_addr{
+       __u16           call_id;
+       struct in_addr  sin_addr;
+};
+/************************************************************************
+ * Protocols supported by AF_PPPOX
+ */
+#define PX_PROTO_OE    0 /* Currently just PPPoE */
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,22)
+#define PX_PROTO_PPTP  1
+#define PX_MAX_PROTO   2
+#else
+#define PX_PROTO_PPTP  2
+#define PX_MAX_PROTO   3
+#endif
+
+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));
+
+
+/*********************************************************************
+ *
+ * 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));
+
+
+/* Socket options */
+#define PPTP_SO_TIMEOUT 1
+
+
+#ifdef __KERNEL__
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+struct pppoe_opt {
+	struct net_device      *dev;	  /* 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) */
+};
+#endif
+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;
+};
+#define PPTP_FLAG_PAUSE 0
+#define PPTP_FLAG_PROC 1
+
+#include <net/sock.h>
+
+struct pppox_sock {
+	/* struct sock must be the first member of pppox_sock */
+	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+	struct ppp_channel	chan;
+	struct sock		*sk;
+	#else
+	struct sock		sk;
+	struct ppp_channel	chan;
+	#endif
+	struct pppox_sock	*next;	  /* for hash table */
+	union {
+		struct pppoe_opt pppoe;
+		struct pptp_opt pptp;
+	} proto;
+	unsigned short		num;
+};
+#define pppoe_dev	proto.pppoe.dev
+#define pppoe_pa	proto.pppoe.pa
+#define pppoe_relay	proto.pppoe.relay
+
+static inline struct pppox_sock *pppox_sk(struct sock *sk)
+{
+	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+	return (struct pppox_sock *)sk->protinfo.pppox;
+	#else
+	return (struct pppox_sock *)sk;
+	#endif
+}
+
+static inline struct sock *sk_pppox(struct pppox_sock *po)
+{
+	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+	return po->sk;
+	#else
+	return (struct sock *)po;
+	#endif
+}
+
+struct module;
+
+struct pppox_proto {
+	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
+	int		(*create)(struct socket *sock);
+	#else
+	int		(*create)(struct net *net, struct socket *sock);
+	#endif
+	int		(*ioctl)(struct socket *sock, unsigned int cmd,
+				 unsigned long arg);
+  #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
+	struct module	*owner;
+	#endif
+};
+
+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) */