[Bluetooth] Add CAPI message transport protocol support

This adds support for the CAPI message transport protocol (CMTP)
to the Bluetooth subsystem.

include/net/bluetooth/bluetooth.h

@@ -47,7 +47,8 @@
 #define BTPROTO_HCI     1
 #define BTPROTO_SCO   	2
 #define BTPROTO_RFCOMM	3
-#define BTPROTO_BNEP    4
+#define BTPROTO_BNEP	4
+#define BTPROTO_CMTP	5
 
 #define SOL_HCI     0
 #define SOL_L2CAP   6

net/bluetooth/Kconfig

@@ -21,6 +21,7 @@ config BT
 	     SCO Module (SCO links)
 	     RFCOMM Module (RFCOMM protocol)  
 	     BNEP Module (BNEP protocol)
+	     CMTP Module (CMTP protocol)
 
 	  Say Y here to enable Linux Bluetooth support and to build Bluetooth Core
 	  layer.
@@ -57,6 +58,8 @@ source "net/bluetooth/rfcomm/Kconfig"
 
 source "net/bluetooth/bnep/Kconfig"
 
+source "net/bluetooth/cmtp/Kconfig"
+
 source "drivers/bluetooth/Kconfig"
 
 endmenu

net/bluetooth/Makefile

@@ -7,5 +7,6 @@ obj-$(CONFIG_BT_L2CAP)	+= l2cap.o
 obj-$(CONFIG_BT_SCO)	+= sco.o
 obj-$(CONFIG_BT_RFCOMM)	+= rfcomm/
 obj-$(CONFIG_BT_BNEP)	+= bnep/
+obj-$(CONFIG_BT_CMTP)	+= cmtp/
 
 bluetooth-objs := af_bluetooth.o hci_core.o hci_conn.o hci_event.o hci_sock.o hci_proc.o lib.o syms.o

net/bluetooth/af_bluetooth.c

@@ -59,7 +59,7 @@
 struct proc_dir_entry *proc_bt;
 
 /* Bluetooth sockets */
-#define BT_MAX_PROTO	5
+#define BT_MAX_PROTO	6
 static struct net_proto_family *bt_proto[BT_MAX_PROTO];
 
 static kmem_cache_t *bt_sock_cache;

net/bluetooth/cmtp/Kconfig

+config BT_CMTP
+	tristate "CMTP protocol support"
+	depends on BT && BT_L2CAP && ISDN_CAPI
+	help
+	  CMTP (CAPI Message Transport Protocol) is a transport layer
+	  for CAPI messages. CMTP is required for the Bluetooth Common
+	  ISDN Access Profile.
+
+	  Say Y here to compile CMTP support into the kernel or say M to
+	  compile it as module (cmtp).
+

net/bluetooth/cmtp/Makefile

+#
+# Makefile for the Linux Bluetooth CMTP layer
+#
+
+obj-$(CONFIG_BT_CMTP) += cmtp.o
+
+cmtp-objs := core.o sock.o capi.o

net/bluetooth/cmtp/cmtp.h

+/* 
+   CMTP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#ifndef __CMTP_H
+#define __CMTP_H
+
+#include <linux/types.h>
+#include <net/bluetooth/bluetooth.h>
+
+#define BTNAMSIZ 18
+
+/* CMTP ioctl defines */
+#define CMTPCONNADD	_IOW('C', 200, int)
+#define CMTPCONNDEL	_IOW('C', 201, int)
+#define CMTPGETCONNLIST	_IOR('C', 210, int)
+#define CMTPGETCONNINFO	_IOR('C', 211, int)
+
+#define CMTP_LOOPBACK	0
+
+struct cmtp_connadd_req {
+	int   sock;	// Connected socket
+	__u32 flags;
+};
+
+struct cmtp_conndel_req {
+	bdaddr_t bdaddr;
+	__u32    flags;
+};
+
+struct cmtp_conninfo {
+	bdaddr_t bdaddr;
+	__u32    flags;
+	__u16    state;
+	int      num;
+};
+
+struct cmtp_connlist_req {
+	__u32  cnum;
+	struct cmtp_conninfo *ci;
+};
+
+int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock);
+int cmtp_del_connection(struct cmtp_conndel_req *req);
+int cmtp_get_connlist(struct cmtp_connlist_req *req);
+int cmtp_get_conninfo(struct cmtp_conninfo *ci);
+
+/* CMTP session defines */
+#define CMTP_INTEROP_TIMEOUT	(HZ * 5)
+#define CMTP_INITIAL_MSGNUM	0xff00
+
+struct cmtp_session {
+	struct list_head list;
+
+	struct socket *sock;
+
+	bdaddr_t bdaddr;
+
+	unsigned long state;
+	unsigned long flags;
+
+	uint mtu;
+
+	char name[BTNAMSIZ];
+
+	atomic_t terminate;
+
+	wait_queue_head_t wait;
+
+	int ncontroller;
+	int num;
+	struct capi_ctr ctrl;
+
+	struct list_head applications;
+
+	unsigned long blockids;
+	int msgnum;
+
+	struct sk_buff_head transmit;
+
+	struct sk_buff *reassembly[16];
+};
+
+struct cmtp_application {
+	struct list_head list;
+
+	unsigned long state;
+	int err;
+
+	__u16 appl;
+	__u16 mapping;
+
+	__u16 msgnum;
+};
+
+struct cmtp_scb {
+	int id;
+	int data;
+};
+
+int  cmtp_attach_device(struct cmtp_session *session);
+void cmtp_detach_device(struct cmtp_session *session);
+
+void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb);
+void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb);
+
+static inline void cmtp_schedule(struct cmtp_session *session)
+{
+	struct sock *sk = session->sock->sk;
+
+	wake_up_interruptible(sk->sk_sleep);
+}
+
+/* CMTP init defines */
+int cmtp_init_sockets(void);
+void cmtp_cleanup_sockets(void);
+
+#endif /* __CMTP_H */

net/bluetooth/cmtp/sock.c

+/* 
+   CMTP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/ioctl.h>
+#include <linux/file.h>
+#include <net/sock.h>
+
+#include <linux/isdn/capilli.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "cmtp.h"
+
+#ifndef CONFIG_BT_CMTP_DEBUG
+#undef  BT_DBG
+#define BT_DBG(D...)
+#endif
+
+static int cmtp_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	sock_orphan(sk);
+	sock_put(sk);
+
+	return 0;
+}
+
+static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct cmtp_connadd_req ca;
+	struct cmtp_conndel_req cd;
+	struct cmtp_connlist_req cl;
+	struct cmtp_conninfo ci;
+	struct socket *nsock;
+	int err;
+
+	BT_DBG("cmd %x arg %lx", cmd, arg);
+
+	switch (cmd) {
+	case CMTPCONNADD:
+		if (!capable(CAP_NET_ADMIN))
+			return -EACCES;
+
+		if (copy_from_user(&ca, (void *) arg, sizeof(ca)))
+			return -EFAULT;
+
+		nsock = sockfd_lookup(ca.sock, &err);
+		if (!nsock)
+			return err;
+
+		if (nsock->sk->sk_state != BT_CONNECTED)
+			return -EBADFD;
+
+		err = cmtp_add_connection(&ca, nsock);
+		if (!err) {
+			if (copy_to_user((void *) arg, &ca, sizeof(ca)))
+				err = -EFAULT;
+		} else
+			fput(nsock->file);
+
+		return err;
+
+	case CMTPCONNDEL:
+		if (!capable(CAP_NET_ADMIN))
+			return -EACCES;
+
+		if (copy_from_user(&cd, (void *) arg, sizeof(cd)))
+			return -EFAULT;
+
+		return cmtp_del_connection(&cd);
+
+	case CMTPGETCONNLIST:
+		if (copy_from_user(&cl, (void *) arg, sizeof(cl)))
+			return -EFAULT;
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = cmtp_get_connlist(&cl);
+		if (!err && copy_to_user((void *) arg, &cl, sizeof(cl)))
+			return -EFAULT;
+
+		return err;
+
+	case CMTPGETCONNINFO:
+		if (copy_from_user(&ci, (void *) arg, sizeof(ci)))
+			return -EFAULT;
+
+		err = cmtp_get_conninfo(&ci);
+		if (!err && copy_to_user((void *) arg, &ci, sizeof(ci)))
+			return -EFAULT;
+
+		return err;
+	}
+
+	return -EINVAL;
+}
+
+static struct proto_ops cmtp_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= cmtp_sock_release,
+	.ioctl		= cmtp_sock_ioctl,
+	.bind		= sock_no_bind,
+	.getname	= sock_no_getname,
+	.sendmsg	= sock_no_sendmsg,
+	.recvmsg	= sock_no_recvmsg,
+	.poll		= sock_no_poll,
+	.listen		= sock_no_listen,
+	.shutdown	= sock_no_shutdown,
+	.setsockopt	= sock_no_setsockopt,
+	.getsockopt	= sock_no_getsockopt,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= sock_no_accept,
+	.mmap		= sock_no_mmap
+};
+
+static int cmtp_sock_create(struct socket *sock, int protocol)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	if (sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sock->ops = &cmtp_sock_ops;
+
+	if (!(sk = bt_sock_alloc(sock, PF_BLUETOOTH, 0, GFP_KERNEL)))
+		return -ENOMEM;
+
+	sock->ops = &cmtp_sock_ops;
+
+	sock->state = SS_UNCONNECTED;
+
+	sk->sk_destruct = NULL;
+	sk->sk_protocol = protocol;
+
+	return 0;
+}
+
+static struct net_proto_family cmtp_sock_family_ops = {
+	.family =	PF_BLUETOOTH,
+	.create =	cmtp_sock_create
+};
+
+int cmtp_init_sockets(void)
+{
+	bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops);
+
+	return 0;
+}
+
+void cmtp_cleanup_sockets(void)
+{
+	if (bt_sock_unregister(BTPROTO_CMTP))
+		BT_ERR("Can't unregister CMTP socket");
+}