diff options
Diffstat (limited to 'net/bluetooth_tizen/l2cap_sock.c')
| -rw-r--r-- | net/bluetooth_tizen/l2cap_sock.c | 1156 |
1 files changed, 0 insertions, 1156 deletions
diff --git a/net/bluetooth_tizen/l2cap_sock.c b/net/bluetooth_tizen/l2cap_sock.c deleted file mode 100644 index 2cae7af..0000000 --- a/net/bluetooth_tizen/l2cap_sock.c +++ /dev/null @@ -1,1156 +0,0 @@ -/* - BlueZ - Bluetooth protocol stack for Linux - Copyright (C) 2000-2001 Qualcomm Incorporated - Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> - Copyright (C) 2010 Google Inc. - Copyright (C) 2011 ProFUSION Embedded Systems - - Written 2000,2001 by Maxim Krasnyansky <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. -*/ - -/* Bluetooth L2CAP sockets. */ - -#include <linux/security.h> - -#include <net/bluetooth/bluetooth.h> -#include <net/bluetooth/hci_core.h> -#include <net/bluetooth/l2cap.h> -#include <net/bluetooth/smp.h> - -static const struct proto_ops l2cap_sock_ops; -static void l2cap_sock_init(struct sock *sk, struct sock *parent); -static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); - -static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - struct sockaddr_l2 la; - int len, err = 0; - - BT_DBG("sk %p", sk); - - if (!addr || addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - memset(&la, 0, sizeof(la)); - len = min_t(unsigned int, sizeof(la), alen); - memcpy(&la, addr, len); - - if (la.l2_cid && la.l2_psm) - return -EINVAL; - - lock_sock(sk); - - if (sk->sk_state != BT_OPEN) { - err = -EBADFD; - goto done; - } - - if (la.l2_psm) { - __u16 psm = __le16_to_cpu(la.l2_psm); - - /* PSM must be odd and lsb of upper byte must be 0 */ - if ((psm & 0x0101) != 0x0001) { - err = -EINVAL; - goto done; - } - - /* Restrict usage of well-known PSMs */ - if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { - err = -EACCES; - goto done; - } - } - - if (la.l2_cid) - err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); - else - err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); - - if (err < 0) - goto done; - - if (__le16_to_cpu(la.l2_psm) == 0x0001 || - __le16_to_cpu(la.l2_psm) == 0x0003) - chan->sec_level = BT_SECURITY_SDP; - - bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); - - chan->state = BT_BOUND; - sk->sk_state = BT_BOUND; - -done: - release_sock(sk); - return err; -} - -static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - struct sockaddr_l2 la; - int len, err = 0; - - BT_DBG("sk %p", sk); - - if (!addr || alen < sizeof(addr->sa_family) || - addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - memset(&la, 0, sizeof(la)); - len = min_t(unsigned int, sizeof(la), alen); - memcpy(&la, addr, len); - - if (la.l2_cid && la.l2_psm) - return -EINVAL; - - err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), - &la.l2_bdaddr); - if (err) - return err; - - lock_sock(sk); - - err = bt_sock_wait_state(sk, BT_CONNECTED, - sock_sndtimeo(sk, flags & O_NONBLOCK)); - - release_sock(sk); - - return err; -} - -static int l2cap_sock_listen(struct socket *sock, int backlog) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - int err = 0; - - BT_DBG("sk %p backlog %d", sk, backlog); - - lock_sock(sk); - - if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) - || sk->sk_state != BT_BOUND) { - err = -EBADFD; - goto done; - } - - switch (chan->mode) { - case L2CAP_MODE_BASIC: - break; - case L2CAP_MODE_ERTM: - case L2CAP_MODE_STREAMING: - if (!disable_ertm) - break; - /* fall through */ - default: - err = -ENOTSUPP; - goto done; - } - - sk->sk_max_ack_backlog = backlog; - sk->sk_ack_backlog = 0; - - chan->state = BT_LISTEN; - sk->sk_state = BT_LISTEN; - -done: - release_sock(sk); - return err; -} - -static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) -{ - DECLARE_WAITQUEUE(wait, current); - struct sock *sk = sock->sk, *nsk; - long timeo; - int err = 0; - - lock_sock_nested(sk, SINGLE_DEPTH_NESTING); - - timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); - - BT_DBG("sk %p timeo %ld", sk, timeo); - - /* Wait for an incoming connection. (wake-one). */ - add_wait_queue_exclusive(sk_sleep(sk), &wait); - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - - if (sk->sk_state != BT_LISTEN) { - err = -EBADFD; - break; - } - - nsk = bt_accept_dequeue(sk, newsock); - if (nsk) - break; - - if (!timeo) { - err = -EAGAIN; - break; - } - - if (signal_pending(current)) { - err = sock_intr_errno(timeo); - break; - } - - release_sock(sk); - timeo = schedule_timeout(timeo); - lock_sock_nested(sk, SINGLE_DEPTH_NESTING); - } - __set_current_state(TASK_RUNNING); - remove_wait_queue(sk_sleep(sk), &wait); - - if (err) - goto done; - - newsock->state = SS_CONNECTED; - - BT_DBG("new socket %p", nsk); - -done: - release_sock(sk); - return err; -} - -static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) -{ - struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - - BT_DBG("sock %p, sk %p", sock, sk); - - addr->sa_family = AF_BLUETOOTH; - *len = sizeof(struct sockaddr_l2); - - if (peer) { - la->l2_psm = chan->psm; - bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); - la->l2_cid = cpu_to_le16(chan->dcid); - } else { - la->l2_psm = chan->sport; - bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); - la->l2_cid = cpu_to_le16(chan->scid); - } - - return 0; -} - -static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - struct l2cap_options opts; - struct l2cap_conninfo cinfo; - int len, err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - if (get_user(len, optlen)) - return -EFAULT; - - lock_sock(sk); - - switch (optname) { - case L2CAP_OPTIONS: - memset(&opts, 0, sizeof(opts)); - opts.imtu = chan->imtu; - opts.omtu = chan->omtu; - opts.flush_to = chan->flush_to; - opts.mode = chan->mode; - opts.fcs = chan->fcs; - opts.max_tx = chan->max_tx; - opts.txwin_size = chan->tx_win; - - len = min_t(unsigned int, len, sizeof(opts)); - if (copy_to_user(optval, (char *) &opts, len)) - err = -EFAULT; - - break; - - case L2CAP_LM: - switch (chan->sec_level) { - case BT_SECURITY_LOW: - opt = L2CAP_LM_AUTH; - break; - case BT_SECURITY_MEDIUM: - opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; - break; - case BT_SECURITY_HIGH: - opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | - L2CAP_LM_SECURE; - break; - default: - opt = 0; - break; - } - - if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) - opt |= L2CAP_LM_MASTER; - - if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) - opt |= L2CAP_LM_RELIABLE; - - if (put_user(opt, (u32 __user *) optval)) - err = -EFAULT; - break; - - case L2CAP_CONNINFO: - if (sk->sk_state != BT_CONNECTED && - !(sk->sk_state == BT_CONNECT2 && - bt_sk(sk)->defer_setup)) { - err = -ENOTCONN; - break; - } - - memset(&cinfo, 0, sizeof(cinfo)); - cinfo.hci_handle = chan->conn->hcon->handle; - memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); - - len = min_t(unsigned int, len, sizeof(cinfo)); - if (copy_to_user(optval, (char *) &cinfo, len)) - err = -EFAULT; - - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - struct bt_security sec; - struct bt_power pwr; - int len, err = 0; - - BT_DBG("sk %p", sk); - - if (level == SOL_L2CAP) - return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); - - if (level != SOL_BLUETOOTH) - return -ENOPROTOOPT; - - if (get_user(len, optlen)) - return -EFAULT; - - lock_sock(sk); - - switch (optname) { - case BT_SECURITY: - if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && - chan->chan_type != L2CAP_CHAN_RAW) { - err = -EINVAL; - break; - } - - memset(&sec, 0, sizeof(sec)); - if (chan->conn) - sec.level = chan->conn->hcon->sec_level; - else - sec.level = chan->sec_level; - - if (sk->sk_state == BT_CONNECTED) - sec.key_size = chan->conn->hcon->enc_key_size; - - len = min_t(unsigned int, len, sizeof(sec)); - if (copy_to_user(optval, (char *) &sec, len)) - err = -EFAULT; - - break; - - case BT_DEFER_SETUP: - if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { - err = -EINVAL; - break; - } - - if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) - err = -EFAULT; - - break; - - case BT_FLUSHABLE: - if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), - (u32 __user *) optval)) - err = -EFAULT; - - break; - - case BT_POWER: - if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM - && sk->sk_type != SOCK_RAW) { - err = -EINVAL; - break; - } - - pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); - - len = min_t(unsigned int, len, sizeof(pwr)); - if (copy_to_user(optval, (char *) &pwr, len)) - err = -EFAULT; - - break; - - case BT_CHANNEL_POLICY: - if (!enable_hs) { - err = -ENOPROTOOPT; - break; - } - - if (put_user(chan->chan_policy, (u32 __user *) optval)) - err = -EFAULT; - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - struct l2cap_options opts; - int len, err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - lock_sock(sk); - - switch (optname) { - case L2CAP_OPTIONS: - if (sk->sk_state == BT_CONNECTED) { - err = -EINVAL; - break; - } - - opts.imtu = chan->imtu; - opts.omtu = chan->omtu; - opts.flush_to = chan->flush_to; - opts.mode = chan->mode; - opts.fcs = chan->fcs; - opts.max_tx = chan->max_tx; - opts.txwin_size = chan->tx_win; - - len = min_t(unsigned int, sizeof(opts), optlen); - if (copy_from_user((char *) &opts, optval, len)) { - err = -EFAULT; - break; - } - - if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { - err = -EINVAL; - break; - } - - chan->mode = opts.mode; - switch (chan->mode) { - case L2CAP_MODE_BASIC: - clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); - break; - case L2CAP_MODE_ERTM: - case L2CAP_MODE_STREAMING: - if (!disable_ertm) - break; - /* fall through */ - default: - err = -EINVAL; - break; - } - - chan->imtu = opts.imtu; - chan->omtu = opts.omtu; - chan->fcs = opts.fcs; - chan->max_tx = opts.max_tx; - chan->tx_win = opts.txwin_size; - break; - - case L2CAP_LM: - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - if (opt & L2CAP_LM_AUTH) - chan->sec_level = BT_SECURITY_LOW; - if (opt & L2CAP_LM_ENCRYPT) - chan->sec_level = BT_SECURITY_MEDIUM; - if (opt & L2CAP_LM_SECURE) - chan->sec_level = BT_SECURITY_HIGH; - - if (opt & L2CAP_LM_MASTER) - set_bit(FLAG_ROLE_SWITCH, &chan->flags); - else - clear_bit(FLAG_ROLE_SWITCH, &chan->flags); - - if (opt & L2CAP_LM_RELIABLE) - set_bit(FLAG_FORCE_RELIABLE, &chan->flags); - else - clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - struct bt_security sec; - struct bt_power pwr; - struct l2cap_conn *conn; - int len, err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - if (level == SOL_L2CAP) - return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); - - if (level != SOL_BLUETOOTH) - return -ENOPROTOOPT; - - lock_sock(sk); - - switch (optname) { - case BT_SECURITY: - if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && - chan->chan_type != L2CAP_CHAN_RAW) { - err = -EINVAL; - break; - } - - sec.level = BT_SECURITY_LOW; - - len = min_t(unsigned int, sizeof(sec), optlen); - if (copy_from_user((char *) &sec, optval, len)) { - err = -EFAULT; - break; - } - - if (sec.level < BT_SECURITY_LOW || - sec.level > BT_SECURITY_HIGH) { - err = -EINVAL; - break; - } - - chan->sec_level = sec.level; - - if (!chan->conn) - break; - - conn = chan->conn; - - /*change security for LE channels */ - if (chan->scid == L2CAP_CID_LE_DATA) { - if (!conn->hcon->out) { - err = -EINVAL; - break; - } - - if (smp_conn_security(conn, sec.level)) - break; - sk->sk_state = BT_CONFIG; - chan->state = BT_CONFIG; - - /* or for ACL link */ - } else if ((sk->sk_state == BT_CONNECT2 && - bt_sk(sk)->defer_setup) || - sk->sk_state == BT_CONNECTED) { - if (!l2cap_chan_check_security(chan)) - bt_sk(sk)->suspended = true; - else - sk->sk_state_change(sk); - } - else { - err = -EINVAL; - } - break; - - case BT_DEFER_SETUP: - if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { - err = -EINVAL; - break; - } - - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - bt_sk(sk)->defer_setup = opt; - break; - - case BT_FLUSHABLE: - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - if (opt > BT_FLUSHABLE_ON) { - err = -EINVAL; - break; - } - - if (opt == BT_FLUSHABLE_OFF) { - struct l2cap_conn *conn = chan->conn; - /* proceed further only when we have l2cap_conn and - No Flush support in the LM */ - if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { - err = -EINVAL; - break; - } - } - - if (opt) - set_bit(FLAG_FLUSHABLE, &chan->flags); - else - clear_bit(FLAG_FLUSHABLE, &chan->flags); - break; - - case BT_POWER: - if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && - chan->chan_type != L2CAP_CHAN_RAW) { - err = -EINVAL; - break; - } - - pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; - - len = min_t(unsigned int, sizeof(pwr), optlen); - if (copy_from_user((char *) &pwr, optval, len)) { - err = -EFAULT; - break; - } - - if (pwr.force_active) - set_bit(FLAG_FORCE_ACTIVE, &chan->flags); - else - clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); - break; - - case BT_CHANNEL_POLICY: - if (!enable_hs) { - err = -ENOPROTOOPT; - break; - } - - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { - err = -EINVAL; - break; - } - - if (chan->mode != L2CAP_MODE_ERTM && - chan->mode != L2CAP_MODE_STREAMING) { - err = -EOPNOTSUPP; - break; - } - - chan->chan_policy = (u8) opt; - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - int err; - - BT_DBG("sock %p, sk %p", sock, sk); - - err = sock_error(sk); - if (err) - return err; - - if (msg->msg_flags & MSG_OOB) - return -EOPNOTSUPP; - - l2cap_chan_lock(chan); - - if (sk->sk_state != BT_CONNECTED) { - l2cap_chan_unlock(chan); - return -ENOTCONN; - } - - err = l2cap_chan_send(chan, msg, len, sk->sk_priority); - l2cap_chan_unlock(chan); - - return err; -} - -static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) -{ - struct sock *sk = sock->sk; - struct l2cap_pinfo *pi = l2cap_pi(sk); - int err; - - lock_sock(sk); - - if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { - sk->sk_state = BT_CONFIG; - pi->chan->state = BT_CONFIG; - - __l2cap_connect_rsp_defer(pi->chan); - release_sock(sk); - return 0; - } - - release_sock(sk); - - if (sock->type == SOCK_STREAM) - err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); - else - err = bt_sock_recvmsg(iocb, sock, msg, len, flags); - - if (pi->chan->mode != L2CAP_MODE_ERTM) - return err; - - /* Attempt to put pending rx data in the socket buffer */ - - lock_sock(sk); - - if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) - goto done; - - if (pi->rx_busy_skb) { - if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) - pi->rx_busy_skb = NULL; - else - goto done; - } - - /* Restore data flow when half of the receive buffer is - * available. This avoids resending large numbers of - * frames. - */ - if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) - l2cap_chan_busy(pi->chan, 0); - -done: - release_sock(sk); - return err; -} - -/* Kill socket (only if zapped and orphan) - * Must be called on unlocked socket. - */ -static void l2cap_sock_kill(struct sock *sk) -{ - if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket || - sock_flag(sk, SOCK_DEAD)) - return; - - BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); - - /* Kill poor orphan */ - - l2cap_chan_destroy(l2cap_pi(sk)->chan); - sock_set_flag(sk, SOCK_DEAD); - sock_put(sk); -} - -static int l2cap_sock_shutdown(struct socket *sock, int how) -{ - struct sock *sk = sock->sk; - struct l2cap_chan *chan; - struct l2cap_conn *conn; - int err = 0; - - BT_DBG("sock %p, sk %p", sock, sk); - - if (!sk) - return 0; - - chan = l2cap_pi(sk)->chan; - conn = chan->conn; - - if (conn) - mutex_lock(&conn->chan_lock); - - l2cap_chan_lock(chan); - lock_sock(sk); - - if (!sk->sk_shutdown) { - if (chan->mode == L2CAP_MODE_ERTM) - err = __l2cap_wait_ack(sk); - - sk->sk_shutdown = SHUTDOWN_MASK; - - release_sock(sk); - l2cap_chan_close(chan, 0); - lock_sock(sk); - - if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) - err = bt_sock_wait_state(sk, BT_CLOSED, - sk->sk_lingertime); - } - - if (!err && sk->sk_err) - err = -sk->sk_err; - - release_sock(sk); - l2cap_chan_unlock(chan); - - if (conn) - mutex_unlock(&conn->chan_lock); - - return err; -} - -static int l2cap_sock_release(struct socket *sock) -{ - struct sock *sk = sock->sk; - int err; - - BT_DBG("sock %p, sk %p", sock, sk); - - if (!sk) - return 0; - - err = l2cap_sock_shutdown(sock, 2); - - sock_orphan(sk); - l2cap_sock_kill(sk); - return err; -} - -static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data) -{ - struct sock *sk, *parent = data; - - sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, - GFP_ATOMIC); - if (!sk) - return NULL; - - bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); - - l2cap_sock_init(sk, parent); - - return l2cap_pi(sk)->chan; -} - -static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb) -{ - int err; - struct sock *sk = data; - struct l2cap_pinfo *pi = l2cap_pi(sk); - - lock_sock(sk); - - if (pi->rx_busy_skb) { - err = -ENOMEM; - goto done; - } - - err = sock_queue_rcv_skb(sk, skb); - - /* For ERTM, handle one skb that doesn't fit into the recv - * buffer. This is important to do because the data frames - * have already been acked, so the skb cannot be discarded. - * - * Notify the l2cap core that the buffer is full, so the - * LOCAL_BUSY state is entered and no more frames are - * acked and reassembled until there is buffer space - * available. - */ - if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { - pi->rx_busy_skb = skb; - l2cap_chan_busy(pi->chan, 1); - err = 0; - } - -done: - release_sock(sk); - - return err; -} - -static void l2cap_sock_close_cb(void *data) -{ - struct sock *sk = data; - - l2cap_sock_kill(sk); -} - -static void l2cap_sock_state_change_cb(void *data, int state) -{ - struct sock *sk = data; - - sk->sk_state = state; -} - -static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, - unsigned long len, int nb, - int *err) -{ - struct sk_buff *skb; - - l2cap_chan_unlock(chan); - - skb = bt_skb_send_alloc(chan->sk, len, nb, err); - - l2cap_chan_lock(chan); - - return skb; -} - -static struct l2cap_ops l2cap_chan_ops = { - .name = "L2CAP Socket Interface", - .new_connection = l2cap_sock_new_connection_cb, - .recv = l2cap_sock_recv_cb, - .close = l2cap_sock_close_cb, - .state_change = l2cap_sock_state_change_cb, - .alloc_skb = l2cap_sock_alloc_skb_cb, -}; - -static void l2cap_sock_destruct(struct sock *sk) -{ - BT_DBG("sk %p", sk); - - if (l2cap_pi(sk)->rx_busy_skb) { - kfree_skb(l2cap_pi(sk)->rx_busy_skb); - l2cap_pi(sk)->rx_busy_skb = NULL; - } - - skb_queue_purge(&sk->sk_receive_queue); - skb_queue_purge(&sk->sk_write_queue); -} - -static void l2cap_sock_init(struct sock *sk, struct sock *parent) -{ - struct l2cap_pinfo *pi = l2cap_pi(sk); - struct l2cap_chan *chan = pi->chan; - - BT_DBG("sk %p", sk); - - if (parent) { - struct l2cap_chan *pchan = l2cap_pi(parent)->chan; - - sk->sk_type = parent->sk_type; - bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; - - chan->chan_type = pchan->chan_type; - chan->imtu = pchan->imtu; - chan->omtu = pchan->omtu; - chan->conf_state = pchan->conf_state; - chan->mode = pchan->mode; - chan->fcs = pchan->fcs; - chan->max_tx = pchan->max_tx; - chan->tx_win = pchan->tx_win; - chan->tx_win_max = pchan->tx_win_max; - chan->sec_level = pchan->sec_level; - chan->flags = pchan->flags; - - security_sk_clone(parent, sk); - } else { - - switch (sk->sk_type) { - case SOCK_RAW: - chan->chan_type = L2CAP_CHAN_RAW; - break; - case SOCK_DGRAM: - chan->chan_type = L2CAP_CHAN_CONN_LESS; - break; - case SOCK_SEQPACKET: - case SOCK_STREAM: - chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; - break; - } - - chan->imtu = L2CAP_DEFAULT_MTU; - chan->omtu = 0; - if (!disable_ertm && sk->sk_type == SOCK_STREAM) { - chan->mode = L2CAP_MODE_ERTM; - set_bit(CONF_STATE2_DEVICE, &chan->conf_state); - } else { - chan->mode = L2CAP_MODE_BASIC; - } - chan->max_tx = L2CAP_DEFAULT_MAX_TX; - chan->fcs = L2CAP_FCS_CRC16; - chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; - chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; - chan->sec_level = BT_SECURITY_LOW; - chan->flags = 0; - set_bit(FLAG_FORCE_ACTIVE, &chan->flags); - } - - /* Default config options */ - chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; - - chan->data = sk; - chan->ops = &l2cap_chan_ops; -} - -static struct proto l2cap_proto = { - .name = "L2CAP", - .owner = THIS_MODULE, - .obj_size = sizeof(struct l2cap_pinfo) -}; - -static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) -{ - struct sock *sk; - struct l2cap_chan *chan; - - sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); - if (!sk) - return NULL; - - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - - sk->sk_destruct = l2cap_sock_destruct; - sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; - - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - - chan = l2cap_chan_create(sk); - if (!chan) { - l2cap_sock_kill(sk); - return NULL; - } - - l2cap_pi(sk)->chan = chan; - - return sk; -} - -static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, - int kern) -{ - struct sock *sk; - - BT_DBG("sock %p", sock); - - sock->state = SS_UNCONNECTED; - - if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && - sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) - return -ESOCKTNOSUPPORT; - - if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) - return -EPERM; - - sock->ops = &l2cap_sock_ops; - - sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); - if (!sk) - return -ENOMEM; - - l2cap_sock_init(sk, NULL); - return 0; -} - -static const struct proto_ops l2cap_sock_ops = { - .family = PF_BLUETOOTH, - .owner = THIS_MODULE, - .release = l2cap_sock_release, - .bind = l2cap_sock_bind, - .connect = l2cap_sock_connect, - .listen = l2cap_sock_listen, - .accept = l2cap_sock_accept, - .getname = l2cap_sock_getname, - .sendmsg = l2cap_sock_sendmsg, - .recvmsg = l2cap_sock_recvmsg, - .poll = bt_sock_poll, - .ioctl = bt_sock_ioctl, - .mmap = sock_no_mmap, - .socketpair = sock_no_socketpair, - .shutdown = l2cap_sock_shutdown, - .setsockopt = l2cap_sock_setsockopt, - .getsockopt = l2cap_sock_getsockopt -}; - -static const struct net_proto_family l2cap_sock_family_ops = { - .family = PF_BLUETOOTH, - .owner = THIS_MODULE, - .create = l2cap_sock_create, -}; - -int __init l2cap_init_sockets(void) -{ - int err; - - err = proto_register(&l2cap_proto, 0); - if (err < 0) - return err; - - err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); - if (err < 0) - goto error; - - BT_INFO("L2CAP socket layer initialized"); - - return 0; - -error: - BT_ERR("L2CAP socket registration failed"); - proto_unregister(&l2cap_proto); - return err; -} - -void l2cap_cleanup_sockets(void) -{ - if (bt_sock_unregister(BTPROTO_L2CAP) < 0) - BT_ERR("L2CAP socket unregistration failed"); - - proto_unregister(&l2cap_proto); -} |