sock.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- /*
- BNEP implementation for Linux Bluetooth stack (BlueZ).
- Copyright (C) 2001-2002 Inventel Systemes
- Written 2001-2002 by
- David Libault <david.libault@inventel.fr>
- Copyright (C) 2002 Maxim Krasnyanskiy <maxk@qualcomm.com>
- 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.
- */
- /*
- * $Id: sock.c,v 1.3 2002/07/10 22:59:52 maxk Exp $
- */
- #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 <asm/system.h>
- #include <asm/uaccess.h>
- #include "bnep.h"
- #ifndef CONFIG_BNEP_DEBUG
- #undef BT_DBG
- #define BT_DBG( A... )
- #endif
- static inline struct socket *socki_lookup(struct inode *inode)
- {
- return &inode->u.socket_i;
- }
- static struct socket *sockfd_lookup(int fd, int *err)
- {
- struct file *file;
- struct inode *inode;
- struct socket *sock;
- if (!(file = fget(fd))) {
- *err = -EBADF;
- return NULL;
- }
- inode = file->f_dentry->d_inode;
- if (!inode->i_sock || !(sock = socki_lookup(inode))) {
- *err = -ENOTSOCK;
- fput(file);
- return NULL;
- }
- if (sock->file != file) {
- printk(KERN_ERR "socki_lookup: socket file changed!n");
- sock->file = file;
- }
- return sock;
- }
-
- static int bnep_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);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
- {
- struct bnep_conlist_req cl;
- struct bnep_conadd_req ca;
- struct bnep_condel_req cd;
- struct bnep_coninfo ci;
- struct socket *nsock;
- int err;
- BT_DBG("cmd %x arg %lx", cmd, arg);
- switch (cmd) {
- case BNEPCONADD:
- 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->state != BT_CONNECTED)
- return -EBADFD;
- err = bnep_add_connection(&ca, nsock);
- if (!err) {
- if (copy_to_user((void *) arg, &ca, sizeof(ca)))
- err = -EFAULT;
- } else
- fput(nsock->file);
- return err;
-
- case BNEPCONDEL:
- if (!capable(CAP_NET_ADMIN))
- return -EACCES;
- if (copy_from_user(&cd, (void *) arg, sizeof(cd)))
- return -EFAULT;
-
- return bnep_del_connection(&cd);
- case BNEPGETCONLIST:
- if (copy_from_user(&cl, (void *) arg, sizeof(cl)))
- return -EFAULT;
- if (cl.cnum <= 0)
- return -EINVAL;
-
- err = bnep_get_conlist(&cl);
- if (!err && copy_to_user((void *) arg, &cl, sizeof(cl)))
- return -EFAULT;
- return err;
- case BNEPGETCONINFO:
- if (copy_from_user(&ci, (void *) arg, sizeof(ci)))
- return -EFAULT;
- err = bnep_get_coninfo(&ci);
- if (!err && copy_to_user((void *) arg, &ci, sizeof(ci)))
- return -EFAULT;
- return err;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static struct proto_ops bnep_sock_ops = {
- family: PF_BLUETOOTH,
- release: bnep_sock_release,
- ioctl: bnep_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 bnep_sock_create(struct socket *sock, int protocol)
- {
- struct sock *sk;
- BT_DBG("sock %p", sock);
- if (sock->type != SOCK_RAW)
- return -ESOCKTNOSUPPORT;
- sock->ops = &bnep_sock_ops;
- if (!(sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, 1)))
- return -ENOMEM;
- MOD_INC_USE_COUNT;
- sock->state = SS_UNCONNECTED;
- sock_init_data(sock, sk);
- sk->destruct = NULL;
- sk->protocol = protocol;
- return 0;
- }
- static struct net_proto_family bnep_sock_family_ops = {
- family: PF_BLUETOOTH,
- create: bnep_sock_create
- };
- int bnep_sock_init(void)
- {
- bluez_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
- return 0;
- }
- int bnep_sock_cleanup(void)
- {
- if (bluez_sock_unregister(BTPROTO_BNEP))
- BT_ERR("Can't unregister BNEP socket");
- return 0;
- }