312 lines
7.1 KiB
C
312 lines
7.1 KiB
C
/*
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HIDP implementation for Linux Bluetooth stack (BlueZ).
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Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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#include <linux/export.h>
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#include <linux/file.h>
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#include "hidp.h"
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static struct bt_sock_list hidp_sk_list = {
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.lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
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};
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static int hidp_sock_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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BT_DBG("sock %p sk %p", sock, sk);
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if (!sk)
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return 0;
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bt_sock_unlink(&hidp_sk_list, sk);
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sock_orphan(sk);
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sock_put(sk);
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return 0;
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}
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static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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{
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void __user *argp = (void __user *) arg;
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struct hidp_connadd_req ca;
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struct hidp_conndel_req cd;
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struct hidp_connlist_req cl;
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struct hidp_conninfo ci;
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struct socket *csock;
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struct socket *isock;
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int err;
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BT_DBG("cmd %x arg %lx", cmd, arg);
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switch (cmd) {
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case HIDPCONNADD:
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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if (copy_from_user(&ca, argp, sizeof(ca)))
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return -EFAULT;
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csock = sockfd_lookup(ca.ctrl_sock, &err);
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if (!csock)
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return err;
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isock = sockfd_lookup(ca.intr_sock, &err);
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if (!isock) {
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sockfd_put(csock);
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return err;
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}
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if (csock->sk->sk_state != BT_CONNECTED ||
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isock->sk->sk_state != BT_CONNECTED) {
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sockfd_put(csock);
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sockfd_put(isock);
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return -EBADFD;
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}
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err = hidp_add_connection(&ca, csock, isock);
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if (!err) {
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if (copy_to_user(argp, &ca, sizeof(ca)))
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err = -EFAULT;
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} else {
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sockfd_put(csock);
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sockfd_put(isock);
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}
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return err;
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case HIDPCONNDEL:
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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if (copy_from_user(&cd, argp, sizeof(cd)))
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return -EFAULT;
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return hidp_del_connection(&cd);
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case HIDPGETCONNLIST:
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if (copy_from_user(&cl, argp, sizeof(cl)))
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return -EFAULT;
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if (cl.cnum <= 0)
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return -EINVAL;
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err = hidp_get_connlist(&cl);
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if (!err && copy_to_user(argp, &cl, sizeof(cl)))
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return -EFAULT;
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return err;
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case HIDPGETCONNINFO:
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if (copy_from_user(&ci, argp, sizeof(ci)))
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return -EFAULT;
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err = hidp_get_conninfo(&ci);
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if (!err && copy_to_user(argp, &ci, sizeof(ci)))
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return -EFAULT;
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return err;
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}
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return -EINVAL;
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}
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#ifdef CONFIG_COMPAT
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struct compat_hidp_connadd_req {
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int ctrl_sock; /* Connected control socket */
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int intr_sock; /* Connected interrupt socket */
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__u16 parser;
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__u16 rd_size;
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compat_uptr_t rd_data;
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__u8 country;
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__u8 subclass;
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__u16 vendor;
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__u16 product;
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__u16 version;
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__u32 flags;
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__u32 idle_to;
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char name[128];
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};
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static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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{
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if (cmd == HIDPGETCONNLIST) {
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struct hidp_connlist_req cl;
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u32 uci;
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int err;
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if (get_user(cl.cnum, (u32 __user *) arg) ||
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get_user(uci, (u32 __user *) (arg + 4)))
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return -EFAULT;
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cl.ci = compat_ptr(uci);
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if (cl.cnum <= 0)
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return -EINVAL;
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err = hidp_get_connlist(&cl);
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if (!err && put_user(cl.cnum, (u32 __user *) arg))
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err = -EFAULT;
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return err;
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} else if (cmd == HIDPCONNADD) {
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struct compat_hidp_connadd_req ca;
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struct hidp_connadd_req __user *uca;
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uca = compat_alloc_user_space(sizeof(*uca));
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if (copy_from_user(&ca, (void __user *) arg, sizeof(ca)))
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return -EFAULT;
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if (put_user(ca.ctrl_sock, &uca->ctrl_sock) ||
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put_user(ca.intr_sock, &uca->intr_sock) ||
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put_user(ca.parser, &uca->parser) ||
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put_user(ca.rd_size, &uca->rd_size) ||
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put_user(compat_ptr(ca.rd_data), &uca->rd_data) ||
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put_user(ca.country, &uca->country) ||
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put_user(ca.subclass, &uca->subclass) ||
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put_user(ca.vendor, &uca->vendor) ||
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put_user(ca.product, &uca->product) ||
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put_user(ca.version, &uca->version) ||
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put_user(ca.flags, &uca->flags) ||
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put_user(ca.idle_to, &uca->idle_to) ||
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copy_to_user(&uca->name[0], &ca.name[0], 128))
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return -EFAULT;
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arg = (unsigned long) uca;
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/* Fall through. We don't actually write back any _changes_
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to the structure anyway, so there's no need to copy back
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into the original compat version */
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}
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return hidp_sock_ioctl(sock, cmd, arg);
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}
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#endif
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static const struct proto_ops hidp_sock_ops = {
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.family = PF_BLUETOOTH,
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.owner = THIS_MODULE,
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.release = hidp_sock_release,
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.ioctl = hidp_sock_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = hidp_sock_compat_ioctl,
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#endif
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.bind = sock_no_bind,
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.getname = sock_no_getname,
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.sendmsg = sock_no_sendmsg,
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.recvmsg = sock_no_recvmsg,
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.poll = sock_no_poll,
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.listen = sock_no_listen,
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.shutdown = sock_no_shutdown,
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.setsockopt = sock_no_setsockopt,
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.getsockopt = sock_no_getsockopt,
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.connect = sock_no_connect,
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.socketpair = sock_no_socketpair,
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.accept = sock_no_accept,
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.mmap = sock_no_mmap
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};
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static struct proto hidp_proto = {
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.name = "HIDP",
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.owner = THIS_MODULE,
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.obj_size = sizeof(struct bt_sock)
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};
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static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
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int kern)
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{
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struct sock *sk;
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BT_DBG("sock %p", sock);
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if (sock->type != SOCK_RAW)
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return -ESOCKTNOSUPPORT;
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sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto);
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if (!sk)
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return -ENOMEM;
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sock_init_data(sock, sk);
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sock->ops = &hidp_sock_ops;
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sock->state = SS_UNCONNECTED;
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sock_reset_flag(sk, SOCK_ZAPPED);
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sk->sk_protocol = protocol;
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sk->sk_state = BT_OPEN;
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bt_sock_link(&hidp_sk_list, sk);
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return 0;
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}
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static const struct net_proto_family hidp_sock_family_ops = {
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.family = PF_BLUETOOTH,
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.owner = THIS_MODULE,
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.create = hidp_sock_create
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};
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int __init hidp_init_sockets(void)
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{
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int err;
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err = proto_register(&hidp_proto, 0);
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if (err < 0)
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return err;
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err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
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if (err < 0) {
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BT_ERR("Can't register HIDP socket");
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goto error;
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}
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err = bt_procfs_init(THIS_MODULE, &init_net, "hidp", &hidp_sk_list, NULL);
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if (err < 0) {
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BT_ERR("Failed to create HIDP proc file");
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bt_sock_unregister(BTPROTO_HIDP);
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goto error;
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}
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BT_INFO("HIDP socket layer initialized");
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return 0;
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error:
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BT_ERR("Can't register HIDP socket");
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proto_unregister(&hidp_proto);
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return err;
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}
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void __exit hidp_cleanup_sockets(void)
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{
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bt_procfs_cleanup(&init_net, "hidp");
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if (bt_sock_unregister(BTPROTO_HIDP) < 0)
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BT_ERR("Can't unregister HIDP socket");
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proto_unregister(&hidp_proto);
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}
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