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- /*
- HIDP implementation for Linux Bluetooth stack (BlueZ).
- Copyright (C) 2003-2004 Marcel Holtmann <[email protected]>
- 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/compat.h>
- #include <linux/export.h>
- #include <linux/file.h>
- #include "hidp.h"
- static struct bt_sock_list hidp_sk_list = {
- .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
- };
- static int hidp_sock_release(struct socket *sock)
- {
- struct sock *sk = sock->sk;
- BT_DBG("sock %p sk %p", sock, sk);
- if (!sk)
- return 0;
- bt_sock_unlink(&hidp_sk_list, sk);
- sock_orphan(sk);
- sock_put(sk);
- return 0;
- }
- static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
- {
- struct hidp_connadd_req ca;
- struct hidp_conndel_req cd;
- struct hidp_connlist_req cl;
- struct hidp_conninfo ci;
- struct socket *csock;
- struct socket *isock;
- int err;
- BT_DBG("cmd %x arg %p", cmd, argp);
- switch (cmd) {
- case HIDPCONNADD:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(&ca, argp, sizeof(ca)))
- return -EFAULT;
- csock = sockfd_lookup(ca.ctrl_sock, &err);
- if (!csock)
- return err;
- isock = sockfd_lookup(ca.intr_sock, &err);
- if (!isock) {
- sockfd_put(csock);
- return err;
- }
- ca.name[sizeof(ca.name)-1] = 0;
- err = hidp_connection_add(&ca, csock, isock);
- if (!err && copy_to_user(argp, &ca, sizeof(ca)))
- err = -EFAULT;
- sockfd_put(csock);
- sockfd_put(isock);
- return err;
- case HIDPCONNDEL:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(&cd, argp, sizeof(cd)))
- return -EFAULT;
- return hidp_connection_del(&cd);
- case HIDPGETCONNLIST:
- if (copy_from_user(&cl, argp, sizeof(cl)))
- return -EFAULT;
- if (cl.cnum <= 0)
- return -EINVAL;
- err = hidp_get_connlist(&cl);
- if (!err && copy_to_user(argp, &cl, sizeof(cl)))
- return -EFAULT;
- return err;
- case HIDPGETCONNINFO:
- if (copy_from_user(&ci, argp, sizeof(ci)))
- return -EFAULT;
- err = hidp_get_conninfo(&ci);
- if (!err && copy_to_user(argp, &ci, sizeof(ci)))
- return -EFAULT;
- return err;
- }
- return -EINVAL;
- }
- static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
- {
- return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
- }
- #ifdef CONFIG_COMPAT
- struct compat_hidp_connadd_req {
- int ctrl_sock; /* Connected control socket */
- int intr_sock; /* Connected interrupt socket */
- __u16 parser;
- __u16 rd_size;
- compat_uptr_t rd_data;
- __u8 country;
- __u8 subclass;
- __u16 vendor;
- __u16 product;
- __u16 version;
- __u32 flags;
- __u32 idle_to;
- char name[128];
- };
- static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
- {
- void __user *argp = compat_ptr(arg);
- int err;
- if (cmd == HIDPGETCONNLIST) {
- struct hidp_connlist_req cl;
- u32 __user *p = argp;
- u32 uci;
- if (get_user(cl.cnum, p) || get_user(uci, p + 1))
- return -EFAULT;
- cl.ci = compat_ptr(uci);
- if (cl.cnum <= 0)
- return -EINVAL;
- err = hidp_get_connlist(&cl);
- if (!err && put_user(cl.cnum, p))
- err = -EFAULT;
- return err;
- } else if (cmd == HIDPCONNADD) {
- struct compat_hidp_connadd_req ca32;
- struct hidp_connadd_req ca;
- struct socket *csock;
- struct socket *isock;
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
- return -EFAULT;
- ca.ctrl_sock = ca32.ctrl_sock;
- ca.intr_sock = ca32.intr_sock;
- ca.parser = ca32.parser;
- ca.rd_size = ca32.rd_size;
- ca.rd_data = compat_ptr(ca32.rd_data);
- ca.country = ca32.country;
- ca.subclass = ca32.subclass;
- ca.vendor = ca32.vendor;
- ca.product = ca32.product;
- ca.version = ca32.version;
- ca.flags = ca32.flags;
- ca.idle_to = ca32.idle_to;
- ca32.name[sizeof(ca32.name) - 1] = '\0';
- memcpy(ca.name, ca32.name, 128);
- csock = sockfd_lookup(ca.ctrl_sock, &err);
- if (!csock)
- return err;
- isock = sockfd_lookup(ca.intr_sock, &err);
- if (!isock) {
- sockfd_put(csock);
- return err;
- }
- err = hidp_connection_add(&ca, csock, isock);
- if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
- err = -EFAULT;
- sockfd_put(csock);
- sockfd_put(isock);
- return err;
- }
- return hidp_sock_ioctl(sock, cmd, arg);
- }
- #endif
- static const struct proto_ops hidp_sock_ops = {
- .family = PF_BLUETOOTH,
- .owner = THIS_MODULE,
- .release = hidp_sock_release,
- .ioctl = hidp_sock_ioctl,
- #ifdef CONFIG_COMPAT
- .compat_ioctl = hidp_sock_compat_ioctl,
- #endif
- .bind = sock_no_bind,
- .getname = sock_no_getname,
- .sendmsg = sock_no_sendmsg,
- .recvmsg = sock_no_recvmsg,
- .listen = sock_no_listen,
- .shutdown = sock_no_shutdown,
- .connect = sock_no_connect,
- .socketpair = sock_no_socketpair,
- .accept = sock_no_accept,
- .mmap = sock_no_mmap
- };
- static struct proto hidp_proto = {
- .name = "HIDP",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct bt_sock)
- };
- static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
- int kern)
- {
- struct sock *sk;
- BT_DBG("sock %p", sock);
- if (sock->type != SOCK_RAW)
- return -ESOCKTNOSUPPORT;
- sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
- if (!sk)
- return -ENOMEM;
- sock_init_data(sock, sk);
- sock->ops = &hidp_sock_ops;
- sock->state = SS_UNCONNECTED;
- sock_reset_flag(sk, SOCK_ZAPPED);
- sk->sk_protocol = protocol;
- sk->sk_state = BT_OPEN;
- bt_sock_link(&hidp_sk_list, sk);
- return 0;
- }
- static const struct net_proto_family hidp_sock_family_ops = {
- .family = PF_BLUETOOTH,
- .owner = THIS_MODULE,
- .create = hidp_sock_create
- };
- int __init hidp_init_sockets(void)
- {
- int err;
- err = proto_register(&hidp_proto, 0);
- if (err < 0)
- return err;
- err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
- if (err < 0) {
- BT_ERR("Can't register HIDP socket");
- goto error;
- }
- err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
- if (err < 0) {
- BT_ERR("Failed to create HIDP proc file");
- bt_sock_unregister(BTPROTO_HIDP);
- goto error;
- }
- BT_INFO("HIDP socket layer initialized");
- return 0;
- error:
- proto_unregister(&hidp_proto);
- return err;
- }
- void __exit hidp_cleanup_sockets(void)
- {
- bt_procfs_cleanup(&init_net, "hidp");
- bt_sock_unregister(BTPROTO_HIDP);
- proto_unregister(&hidp_proto);
- }
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