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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /net/bluetooth/hidp/sock.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/bluetooth/hidp/sock.c')
-rw-r--r-- | net/bluetooth/hidp/sock.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c new file mode 100644 index 000000000..369ed92da --- /dev/null +++ b/net/bluetooth/hidp/sock.c @@ -0,0 +1,320 @@ +/* + HIDP implementation for Linux Bluetooth stack (BlueZ). + Copyright (C) 2003-2004 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/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); +} |