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320 lines
6.9 KiB
320 lines
6.9 KiB
/* |
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HIDP implementation for Linux Bluetooth stack (BlueZ). |
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Copyright (C) 2003-2004 Marcel Holtmann <[email protected]> |
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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/compat.h> |
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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 do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp) |
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{ |
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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 %p", cmd, argp); |
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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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ca.name[sizeof(ca.name)-1] = 0; |
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err = hidp_connection_add(&ca, csock, isock); |
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if (!err && copy_to_user(argp, &ca, sizeof(ca))) |
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err = -EFAULT; |
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sockfd_put(csock); |
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sockfd_put(isock); |
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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_connection_del(&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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static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
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{ |
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return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg); |
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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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void __user *argp = compat_ptr(arg); |
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int err; |
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if (cmd == HIDPGETCONNLIST) { |
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struct hidp_connlist_req cl; |
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u32 __user *p = argp; |
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u32 uci; |
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if (get_user(cl.cnum, p) || get_user(uci, p + 1)) |
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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, p)) |
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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 ca32; |
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struct hidp_connadd_req ca; |
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struct socket *csock; |
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struct socket *isock; |
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if (!capable(CAP_NET_ADMIN)) |
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return -EPERM; |
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if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32))) |
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return -EFAULT; |
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ca.ctrl_sock = ca32.ctrl_sock; |
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ca.intr_sock = ca32.intr_sock; |
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ca.parser = ca32.parser; |
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ca.rd_size = ca32.rd_size; |
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ca.rd_data = compat_ptr(ca32.rd_data); |
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ca.country = ca32.country; |
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ca.subclass = ca32.subclass; |
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ca.vendor = ca32.vendor; |
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ca.product = ca32.product; |
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ca.version = ca32.version; |
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ca.flags = ca32.flags; |
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ca.idle_to = ca32.idle_to; |
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ca32.name[sizeof(ca32.name) - 1] = '\0'; |
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memcpy(ca.name, ca32.name, 128); |
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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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err = hidp_connection_add(&ca, csock, isock); |
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if (!err && copy_to_user(argp, &ca32, sizeof(ca32))) |
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err = -EFAULT; |
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sockfd_put(csock); |
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sockfd_put(isock); |
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return err; |
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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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.listen = sock_no_listen, |
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.shutdown = sock_no_shutdown, |
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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, kern); |
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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(&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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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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bt_sock_unregister(BTPROTO_HIDP); |
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proto_unregister(&hidp_proto); |
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}
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