diff options
Diffstat (limited to 'net/bluetooth_tizen/rfcomm')
| -rw-r--r-- | net/bluetooth_tizen/rfcomm/Kconfig | 17 | ||||
| -rw-r--r-- | net/bluetooth_tizen/rfcomm/Makefile | 8 | ||||
| -rw-r--r-- | net/bluetooth_tizen/rfcomm/core.c | 2245 | ||||
| -rw-r--r-- | net/bluetooth_tizen/rfcomm/sock.c | 1078 | ||||
| -rw-r--r-- | net/bluetooth_tizen/rfcomm/tty.c | 1188 |
5 files changed, 0 insertions, 4536 deletions
diff --git a/net/bluetooth_tizen/rfcomm/Kconfig b/net/bluetooth_tizen/rfcomm/Kconfig deleted file mode 100644 index 22e718b..0000000 --- a/net/bluetooth_tizen/rfcomm/Kconfig +++ /dev/null @@ -1,17 +0,0 @@ -config BT_RFCOMM - tristate "RFCOMM protocol support" - depends on BT - help - RFCOMM provides connection oriented stream transport. RFCOMM - support is required for Dialup Networking, OBEX and other Bluetooth - applications. - - Say Y here to compile RFCOMM support into the kernel or say M to - compile it as module (rfcomm). - -config BT_RFCOMM_TTY - bool "RFCOMM TTY support" - depends on BT_RFCOMM - help - This option enables TTY emulation support for RFCOMM channels. - diff --git a/net/bluetooth_tizen/rfcomm/Makefile b/net/bluetooth_tizen/rfcomm/Makefile deleted file mode 100644 index fe07988..0000000 --- a/net/bluetooth_tizen/rfcomm/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# -# Makefile for the Linux Bluetooth RFCOMM layer. -# - -obj-$(CONFIG_BT_RFCOMM) += rfcomm.o - -rfcomm-y := core.o sock.o -rfcomm-$(CONFIG_BT_RFCOMM_TTY) += tty.o diff --git a/net/bluetooth_tizen/rfcomm/core.c b/net/bluetooth_tizen/rfcomm/core.c deleted file mode 100644 index 8a60238..0000000 --- a/net/bluetooth_tizen/rfcomm/core.c +++ /dev/null @@ -1,2245 +0,0 @@ -/* - RFCOMM implementation for Linux Bluetooth stack (BlueZ). - Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> - Copyright (C) 2002 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. -*/ - -/* - * Bluetooth RFCOMM core. - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/init.h> -#include <linux/wait.h> -#include <linux/device.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/net.h> -#include <linux/mutex.h> -#include <linux/kthread.h> -#include <linux/slab.h> - -#include <net/sock.h> -#include <linux/uaccess.h> -#include <asm/unaligned.h> - -#include <net/bluetooth/bluetooth.h> -#include <net/bluetooth/hci_core.h> -#include <net/bluetooth/l2cap.h> -#include <net/bluetooth/rfcomm.h> - -#define VERSION "1.11" - -static bool disable_cfc; -static bool l2cap_ertm; -static int channel_mtu = -1; -static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU; - -static struct task_struct *rfcomm_thread; - -static DEFINE_MUTEX(rfcomm_mutex); -#define rfcomm_lock() mutex_lock(&rfcomm_mutex) -#define rfcomm_unlock() mutex_unlock(&rfcomm_mutex) - - -static LIST_HEAD(session_list); - -static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len); -static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci); -static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci); -static int rfcomm_queue_disc(struct rfcomm_dlc *d); -static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type); -static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d); -static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig); -static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len); -static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits); -static void rfcomm_make_uih(struct sk_buff *skb, u8 addr); - -static void rfcomm_process_connect(struct rfcomm_session *s); - -static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, - bdaddr_t *dst, - u8 sec_level, - int *err); -static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst); -static void rfcomm_session_del(struct rfcomm_session *s); - -/* ---- RFCOMM frame parsing macros ---- */ -#define __get_dlci(b) ((b & 0xfc) >> 2) -#define __get_channel(b) ((b & 0xf8) >> 3) -#define __get_dir(b) ((b & 0x04) >> 2) -#define __get_type(b) ((b & 0xef)) - -#define __test_ea(b) ((b & 0x01)) -#define __test_cr(b) ((b & 0x02)) -#define __test_pf(b) ((b & 0x10)) - -#define __addr(cr, dlci) (((dlci & 0x3f) << 2) | (cr << 1) | 0x01) -#define __ctrl(type, pf) (((type & 0xef) | (pf << 4))) -#define __dlci(dir, chn) (((chn & 0x1f) << 1) | dir) -#define __srv_channel(dlci) (dlci >> 1) -#define __dir(dlci) (dlci & 0x01) - -#define __len8(len) (((len) << 1) | 1) -#define __len16(len) ((len) << 1) - -/* MCC macros */ -#define __mcc_type(cr, type) (((type << 2) | (cr << 1) | 0x01)) -#define __get_mcc_type(b) ((b & 0xfc) >> 2) -#define __get_mcc_len(b) ((b & 0xfe) >> 1) - -/* RPN macros */ -#define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3)) -#define __get_rpn_data_bits(line) ((line) & 0x3) -#define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1) -#define __get_rpn_parity(line) (((line) >> 3) & 0x7) - -static inline void rfcomm_schedule(void) -{ - if (!rfcomm_thread) - return; - wake_up_process(rfcomm_thread); -} - -static inline void rfcomm_session_put(struct rfcomm_session *s) -{ - if (atomic_dec_and_test(&s->refcnt)) - rfcomm_session_del(s); -} - -/* ---- RFCOMM FCS computation ---- */ - -/* reversed, 8-bit, poly=0x07 */ -static unsigned char rfcomm_crc_table[256] = { - 0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75, - 0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b, - 0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69, - 0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67, - - 0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d, - 0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43, - 0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51, - 0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f, - - 0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05, - 0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b, - 0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19, - 0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17, - - 0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d, - 0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33, - 0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21, - 0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f, - - 0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95, - 0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b, - 0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89, - 0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87, - - 0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad, - 0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3, - 0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1, - 0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf, - - 0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5, - 0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb, - 0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9, - 0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7, - - 0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd, - 0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3, - 0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1, - 0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf -}; - -/* CRC on 2 bytes */ -#define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]]) - -/* FCS on 2 bytes */ -static inline u8 __fcs(u8 *data) -{ - return 0xff - __crc(data); -} - -/* FCS on 3 bytes */ -static inline u8 __fcs2(u8 *data) -{ - return 0xff - rfcomm_crc_table[__crc(data) ^ data[2]]; -} - -/* Check FCS */ -static inline int __check_fcs(u8 *data, int type, u8 fcs) -{ - u8 f = __crc(data); - - if (type != RFCOMM_UIH) - f = rfcomm_crc_table[f ^ data[2]]; - - return rfcomm_crc_table[f ^ fcs] != 0xcf; -} - -/* ---- L2CAP callbacks ---- */ -static void rfcomm_l2state_change(struct sock *sk) -{ - BT_DBG("%p state %d", sk, sk->sk_state); - rfcomm_schedule(); -} - -static void rfcomm_l2data_ready(struct sock *sk, int bytes) -{ - BT_DBG("%p bytes %d", sk, bytes); - rfcomm_schedule(); -} - -static int rfcomm_l2sock_create(struct socket **sock) -{ - int err; - - BT_DBG(""); - - err = sock_create_kern(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock); - if (!err) { - struct sock *sk = (*sock)->sk; - sk->sk_data_ready = rfcomm_l2data_ready; - sk->sk_state_change = rfcomm_l2state_change; - } - return err; -} - -static inline int rfcomm_check_security(struct rfcomm_dlc *d) -{ - struct sock *sk = d->session->sock->sk; - struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; - - __u8 auth_type; - - switch (d->sec_level) { - case BT_SECURITY_HIGH: - auth_type = HCI_AT_GENERAL_BONDING_MITM; - break; - case BT_SECURITY_MEDIUM: - auth_type = HCI_AT_GENERAL_BONDING; - break; - default: - auth_type = HCI_AT_NO_BONDING; - break; - } - - return hci_conn_security(conn->hcon, d->sec_level, auth_type); -} - -static void rfcomm_session_timeout(unsigned long arg) -{ - struct rfcomm_session *s = (void *) arg; - - BT_DBG("session %p state %ld", s, s->state); - - set_bit(RFCOMM_TIMED_OUT, &s->flags); - rfcomm_schedule(); -} - -static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout) -{ - BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout); - - if (!mod_timer(&s->timer, jiffies + timeout)) - rfcomm_session_hold(s); -} - -static void rfcomm_session_clear_timer(struct rfcomm_session *s) -{ - BT_DBG("session %p state %ld", s, s->state); - - if (timer_pending(&s->timer) && del_timer(&s->timer)) - rfcomm_session_put(s); -} - -/* ---- RFCOMM DLCs ---- */ -static void rfcomm_dlc_timeout(unsigned long arg) -{ - struct rfcomm_dlc *d = (void *) arg; - - BT_DBG("dlc %p state %ld", d, d->state); - - set_bit(RFCOMM_TIMED_OUT, &d->flags); - rfcomm_dlc_put(d); - rfcomm_schedule(); -} - -static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout) -{ - BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout); - - if (!mod_timer(&d->timer, jiffies + timeout)) - rfcomm_dlc_hold(d); -} - -static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d) -{ - BT_DBG("dlc %p state %ld", d, d->state); - - if (timer_pending(&d->timer) && del_timer(&d->timer)) - rfcomm_dlc_put(d); -} - -static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d) -{ - BT_DBG("%p", d); - - d->state = BT_OPEN; - d->flags = 0; - d->mscex = 0; - d->sec_level = BT_SECURITY_LOW; - d->mtu = RFCOMM_DEFAULT_MTU; - d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV; - - d->cfc = RFCOMM_CFC_DISABLED; - d->rx_credits = RFCOMM_DEFAULT_CREDITS; -} - -struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) -{ - struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio); - - if (!d) - return NULL; - - setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d); - - skb_queue_head_init(&d->tx_queue); - spin_lock_init(&d->lock); - atomic_set(&d->refcnt, 1); - - rfcomm_dlc_clear_state(d); - - BT_DBG("%p", d); - - return d; -} - -void rfcomm_dlc_free(struct rfcomm_dlc *d) -{ - BT_DBG("%p", d); - - skb_queue_purge(&d->tx_queue); - kfree(d); -} - -static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d) -{ - BT_DBG("dlc %p session %p", d, s); - - rfcomm_session_hold(s); - - rfcomm_session_clear_timer(s); - rfcomm_dlc_hold(d); - list_add(&d->list, &s->dlcs); - d->session = s; -} - -static void rfcomm_dlc_unlink(struct rfcomm_dlc *d) -{ - struct rfcomm_session *s = d->session; - - BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s); - - list_del(&d->list); - d->session = NULL; - rfcomm_dlc_put(d); - - if (list_empty(&s->dlcs)) - rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT); - - rfcomm_session_put(s); -} - -static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci) -{ - struct rfcomm_dlc *d; - - list_for_each_entry(d, &s->dlcs, list) - if (d->dlci == dlci) - return d; - - return NULL; -} - -static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) -{ - struct rfcomm_session *s; - int err = 0; - u8 dlci; - - BT_DBG("dlc %p state %ld %s %s channel %d", - d, d->state, batostr(src), batostr(dst), channel); - - if (channel < 1 || channel > 30) - return -EINVAL; - - if (d->state != BT_OPEN && d->state != BT_CLOSED) - return 0; - - s = rfcomm_session_get(src, dst); - if (!s) { - s = rfcomm_session_create(src, dst, d->sec_level, &err); - if (!s) - return err; - } - - dlci = __dlci(!s->initiator, channel); - - /* Check if DLCI already exists */ - if (rfcomm_dlc_get(s, dlci)) - return -EBUSY; - - rfcomm_dlc_clear_state(d); - - d->dlci = dlci; - d->addr = __addr(s->initiator, dlci); - d->priority = 7; - - d->state = BT_CONFIG; - rfcomm_dlc_link(s, d); - - d->out = 1; - - d->mtu = s->mtu; - d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; - - if (s->state == BT_CONNECTED) { - if (rfcomm_check_security(d)) - rfcomm_send_pn(s, 1, d); - else - set_bit(RFCOMM_AUTH_PENDING, &d->flags); - } - - rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); - - return 0; -} - -int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) -{ - int r; - - rfcomm_lock(); - - r = __rfcomm_dlc_open(d, src, dst, channel); - - rfcomm_unlock(); - return r; -} - -static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err) -{ - struct rfcomm_session *s = d->session; - if (!s) - return 0; - - BT_DBG("dlc %p state %ld dlci %d err %d session %p", - d, d->state, d->dlci, err, s); - - switch (d->state) { - case BT_CONNECT: - case BT_CONFIG: - if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { - set_bit(RFCOMM_AUTH_REJECT, &d->flags); - rfcomm_schedule(); - break; - } - /* Fall through */ - - case BT_CONNECTED: - d->state = BT_DISCONN; - if (skb_queue_empty(&d->tx_queue)) { - rfcomm_send_disc(s, d->dlci); - rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT); - } else { - rfcomm_queue_disc(d); - rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2); - } - break; - - case BT_OPEN: - case BT_CONNECT2: - if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { - set_bit(RFCOMM_AUTH_REJECT, &d->flags); - rfcomm_schedule(); - break; - } - /* Fall through */ - - default: - rfcomm_dlc_clear_timer(d); - - rfcomm_dlc_lock(d); - d->state = BT_CLOSED; - d->state_change(d, err); - rfcomm_dlc_unlock(d); - - skb_queue_purge(&d->tx_queue); - rfcomm_dlc_unlink(d); - } - - return 0; -} - -int rfcomm_dlc_close(struct rfcomm_dlc *d, int err) -{ - int r; - - rfcomm_lock(); - - r = __rfcomm_dlc_close(d, err); - - rfcomm_unlock(); - return r; -} - -int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb) -{ - int len = skb->len; - - if (d->state != BT_CONNECTED) - return -ENOTCONN; - - BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len); - - if (len > d->mtu) - return -EINVAL; - - rfcomm_make_uih(skb, d->addr); - skb_queue_tail(&d->tx_queue, skb); - - if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags)) - rfcomm_schedule(); - return len; -} - -void __rfcomm_dlc_throttle(struct rfcomm_dlc *d) -{ - BT_DBG("dlc %p state %ld", d, d->state); - - if (!d->cfc) { - d->v24_sig |= RFCOMM_V24_FC; - set_bit(RFCOMM_MSC_PENDING, &d->flags); - } - rfcomm_schedule(); -} - -void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) -{ - BT_DBG("dlc %p state %ld", d, d->state); - - if (!d->cfc) { - d->v24_sig &= ~RFCOMM_V24_FC; - set_bit(RFCOMM_MSC_PENDING, &d->flags); - } - rfcomm_schedule(); -} - -/* - Set/get modem status functions use _local_ status i.e. what we report - to the other side. - Remote status is provided by dlc->modem_status() callback. - */ -int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig) -{ - BT_DBG("dlc %p state %ld v24_sig 0x%x", - d, d->state, v24_sig); - - if (test_bit(RFCOMM_RX_THROTTLED, &d->flags)) - v24_sig |= RFCOMM_V24_FC; - else - v24_sig &= ~RFCOMM_V24_FC; - - d->v24_sig = v24_sig; - - if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags)) - rfcomm_schedule(); - - return 0; -} - -int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig) -{ - BT_DBG("dlc %p state %ld v24_sig 0x%x", - d, d->state, d->v24_sig); - - *v24_sig = d->v24_sig; - return 0; -} - -/* ---- RFCOMM sessions ---- */ -static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state) -{ - struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL); - - if (!s) - return NULL; - - BT_DBG("session %p sock %p", s, sock); - - setup_timer(&s->timer, rfcomm_session_timeout, (unsigned long) s); - - INIT_LIST_HEAD(&s->dlcs); - s->state = state; - s->sock = sock; - - s->mtu = RFCOMM_DEFAULT_MTU; - s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN; - - /* Do not increment module usage count for listening sessions. - * Otherwise we won't be able to unload the module. */ - if (state != BT_LISTEN) - if (!try_module_get(THIS_MODULE)) { - kfree(s); - return NULL; - } - - list_add(&s->list, &session_list); - - return s; -} - -static void rfcomm_session_del(struct rfcomm_session *s) -{ - int state = s->state; - - BT_DBG("session %p state %ld", s, s->state); - - list_del(&s->list); - - if (state == BT_CONNECTED) - rfcomm_send_disc(s, 0); - - rfcomm_session_clear_timer(s); - sock_release(s->sock); - kfree(s); - - if (state != BT_LISTEN) - module_put(THIS_MODULE); -} - -static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst) -{ - struct rfcomm_session *s; - struct list_head *p, *n; - struct bt_sock *sk; - list_for_each_safe(p, n, &session_list) { - s = list_entry(p, struct rfcomm_session, list); - sk = bt_sk(s->sock->sk); - - if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) && - !bacmp(&sk->dst, dst)) - return s; - } - return NULL; -} - -static void rfcomm_session_close(struct rfcomm_session *s, int err) -{ - struct rfcomm_dlc *d; - struct list_head *p, *n; - - BT_DBG("session %p state %ld err %d", s, s->state, err); - - rfcomm_session_hold(s); - - s->state = BT_CLOSED; - - /* Close all dlcs */ - list_for_each_safe(p, n, &s->dlcs) { - d = list_entry(p, struct rfcomm_dlc, list); - d->state = BT_CLOSED; - __rfcomm_dlc_close(d, err); - } - - rfcomm_session_clear_timer(s); - rfcomm_session_put(s); -} - -static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, - bdaddr_t *dst, - u8 sec_level, - int *err) -{ - struct rfcomm_session *s = NULL; - struct sockaddr_l2 addr; - struct socket *sock; - struct sock *sk; - - BT_DBG("%s %s", batostr(src), batostr(dst)); - - *err = rfcomm_l2sock_create(&sock); - if (*err < 0) - return NULL; - - bacpy(&addr.l2_bdaddr, src); - addr.l2_family = AF_BLUETOOTH; - addr.l2_psm = 0; - addr.l2_cid = 0; - *err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); - if (*err < 0) - goto failed; - - /* Set L2CAP options */ - sk = sock->sk; - lock_sock(sk); - l2cap_pi(sk)->chan->imtu = l2cap_mtu; - l2cap_pi(sk)->chan->sec_level = sec_level; - if (l2cap_ertm) - l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM; - release_sock(sk); - - s = rfcomm_session_add(sock, BT_BOUND); - if (!s) { - *err = -ENOMEM; - goto failed; - } - - s->initiator = 1; - - bacpy(&addr.l2_bdaddr, dst); - addr.l2_family = AF_BLUETOOTH; - addr.l2_psm = cpu_to_le16(RFCOMM_PSM); - addr.l2_cid = 0; - *err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK); - if (*err == 0 || *err == -EINPROGRESS) - return s; - - rfcomm_session_del(s); - return NULL; - -failed: - sock_release(sock); - return NULL; -} - -void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst) -{ - struct sock *sk = s->sock->sk; - if (src) - bacpy(src, &bt_sk(sk)->src); - if (dst) - bacpy(dst, &bt_sk(sk)->dst); -} - -/* ---- RFCOMM frame sending ---- */ -static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len) -{ - struct kvec iv = { data, len }; - struct msghdr msg; - - BT_DBG("session %p len %d", s, len); - - memset(&msg, 0, sizeof(msg)); - - return kernel_sendmsg(s->sock, &msg, &iv, 1, len); -} - -static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd) -{ - BT_DBG("%p cmd %u", s, cmd->ctrl); - - return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd)); -} - -static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci) -{ - struct rfcomm_cmd cmd; - - BT_DBG("%p dlci %d", s, dlci); - - cmd.addr = __addr(s->initiator, dlci); - cmd.ctrl = __ctrl(RFCOMM_SABM, 1); - cmd.len = __len8(0); - cmd.fcs = __fcs2((u8 *) &cmd); - - return rfcomm_send_cmd(s, &cmd); -} - -static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci) -{ - struct rfcomm_cmd cmd; - - BT_DBG("%p dlci %d", s, dlci); - - cmd.addr = __addr(!s->initiator, dlci); - cmd.ctrl = __ctrl(RFCOMM_UA, 1); - cmd.len = __len8(0); - cmd.fcs = __fcs2((u8 *) &cmd); - - return rfcomm_send_cmd(s, &cmd); -} - -static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci) -{ - struct rfcomm_cmd cmd; - - BT_DBG("%p dlci %d", s, dlci); - - cmd.addr = __addr(s->initiator, dlci); - cmd.ctrl = __ctrl(RFCOMM_DISC, 1); - cmd.len = __len8(0); - cmd.fcs = __fcs2((u8 *) &cmd); - - return rfcomm_send_cmd(s, &cmd); -} - -static int rfcomm_queue_disc(struct rfcomm_dlc *d) -{ - struct rfcomm_cmd *cmd; - struct sk_buff *skb; - - BT_DBG("dlc %p dlci %d", d, d->dlci); - - skb = alloc_skb(sizeof(*cmd), GFP_KERNEL); - if (!skb) - return -ENOMEM; - - cmd = (void *) __skb_put(skb, sizeof(*cmd)); - cmd->addr = d->addr; - cmd->ctrl = __ctrl(RFCOMM_DISC, 1); - cmd->len = __len8(0); - cmd->fcs = __fcs2((u8 *) cmd); - - skb_queue_tail(&d->tx_queue, skb); - rfcomm_schedule(); - return 0; -} - -static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci) -{ - struct rfcomm_cmd cmd; - - BT_DBG("%p dlci %d", s, dlci); - - cmd.addr = __addr(!s->initiator, dlci); - cmd.ctrl = __ctrl(RFCOMM_DM, 1); - cmd.len = __len8(0); - cmd.fcs = __fcs2((u8 *) &cmd); - - return rfcomm_send_cmd(s, &cmd); -} - -static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d type %d", s, cr, type); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc) + 1); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_NSC); - mcc->len = __len8(1); - - /* Type that we didn't like */ - *ptr = __mcc_type(cr, type); ptr++; - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - struct rfcomm_pn *pn; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc) + sizeof(*pn)); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_PN); - mcc->len = __len8(sizeof(*pn)); - - pn = (void *) ptr; ptr += sizeof(*pn); - pn->dlci = d->dlci; - pn->priority = d->priority; - pn->ack_timer = 0; - pn->max_retrans = 0; - - if (s->cfc) { - pn->flow_ctrl = cr ? 0xf0 : 0xe0; - pn->credits = RFCOMM_DEFAULT_CREDITS; - } else { - pn->flow_ctrl = 0; - pn->credits = 0; - } - - if (cr && channel_mtu >= 0) - pn->mtu = cpu_to_le16(channel_mtu); - else - pn->mtu = cpu_to_le16(d->mtu); - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, - u8 bit_rate, u8 data_bits, u8 stop_bits, - u8 parity, u8 flow_ctrl_settings, - u8 xon_char, u8 xoff_char, u16 param_mask) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - struct rfcomm_rpn *rpn; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x" - " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x", - s, cr, dlci, bit_rate, data_bits, stop_bits, parity, - flow_ctrl_settings, xon_char, xoff_char, param_mask); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn)); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_RPN); - mcc->len = __len8(sizeof(*rpn)); - - rpn = (void *) ptr; ptr += sizeof(*rpn); - rpn->dlci = __addr(1, dlci); - rpn->bit_rate = bit_rate; - rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity); - rpn->flow_ctrl = flow_ctrl_settings; - rpn->xon_char = xon_char; - rpn->xoff_char = xoff_char; - rpn->param_mask = cpu_to_le16(param_mask); - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - struct rfcomm_rls *rls; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d status 0x%x", s, cr, status); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc) + sizeof(*rls)); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_RLS); - mcc->len = __len8(sizeof(*rls)); - - rls = (void *) ptr; ptr += sizeof(*rls); - rls->dlci = __addr(1, dlci); - rls->status = status; - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - struct rfcomm_msc *msc; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc) + sizeof(*msc)); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_MSC); - mcc->len = __len8(sizeof(*msc)); - - msc = (void *) ptr; ptr += sizeof(*msc); - msc->dlci = __addr(1, dlci); - msc->v24_sig = v24_sig | 0x01; - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d", s, cr); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc)); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_FCOFF); - mcc->len = __len8(0); - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static int rfcomm_send_fcon(struct rfcomm_session *s, int cr) -{ - struct rfcomm_hdr *hdr; - struct rfcomm_mcc *mcc; - u8 buf[16], *ptr = buf; - - BT_DBG("%p cr %d", s, cr); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = __addr(s->initiator, 0); - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - hdr->len = __len8(sizeof(*mcc)); - - mcc = (void *) ptr; ptr += sizeof(*mcc); - mcc->type = __mcc_type(cr, RFCOMM_FCON); - mcc->len = __len8(0); - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len) -{ - struct socket *sock = s->sock; - struct kvec iv[3]; - struct msghdr msg; - unsigned char hdr[5], crc[1]; - - if (len > 125) - return -EINVAL; - - BT_DBG("%p cr %d", s, cr); - - hdr[0] = __addr(s->initiator, 0); - hdr[1] = __ctrl(RFCOMM_UIH, 0); - hdr[2] = 0x01 | ((len + 2) << 1); - hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2); - hdr[4] = 0x01 | (len << 1); - - crc[0] = __fcs(hdr); - - iv[0].iov_base = hdr; - iv[0].iov_len = 5; - iv[1].iov_base = pattern; - iv[1].iov_len = len; - iv[2].iov_base = crc; - iv[2].iov_len = 1; - - memset(&msg, 0, sizeof(msg)); - - return kernel_sendmsg(sock, &msg, iv, 3, 6 + len); -} - -static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits) -{ - struct rfcomm_hdr *hdr; - u8 buf[16], *ptr = buf; - - BT_DBG("%p addr %d credits %d", s, addr, credits); - - hdr = (void *) ptr; ptr += sizeof(*hdr); - hdr->addr = addr; - hdr->ctrl = __ctrl(RFCOMM_UIH, 1); - hdr->len = __len8(0); - - *ptr = credits; ptr++; - - *ptr = __fcs(buf); ptr++; - - return rfcomm_send_frame(s, buf, ptr - buf); -} - -static void rfcomm_make_uih(struct sk_buff *skb, u8 addr) -{ - struct rfcomm_hdr *hdr; - int len = skb->len; - u8 *crc; - - if (len > 127) { - hdr = (void *) skb_push(skb, 4); - put_unaligned(cpu_to_le16(__len16(len)), (__le16 *) &hdr->len); - } else { - hdr = (void *) skb_push(skb, 3); - hdr->len = __len8(len); - } - hdr->addr = addr; - hdr->ctrl = __ctrl(RFCOMM_UIH, 0); - - crc = skb_put(skb, 1); - *crc = __fcs((void *) hdr); -} - -/* ---- RFCOMM frame reception ---- */ -static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci) -{ - BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); - - if (dlci) { - /* Data channel */ - struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); - if (!d) { - rfcomm_send_dm(s, dlci); - return 0; - } - - switch (d->state) { - case BT_CONNECT: - rfcomm_dlc_clear_timer(d); - - rfcomm_dlc_lock(d); - d->state = BT_CONNECTED; - d->state_change(d, 0); - rfcomm_dlc_unlock(d); - - rfcomm_send_msc(s, 1, dlci, d->v24_sig); - break; - - case BT_DISCONN: - d->state = BT_CLOSED; - __rfcomm_dlc_close(d, 0); - - if (list_empty(&s->dlcs)) { - s->state = BT_DISCONN; - rfcomm_send_disc(s, 0); - rfcomm_session_clear_timer(s); - } - - break; - } - } else { - /* Control channel */ - switch (s->state) { - case BT_CONNECT: - s->state = BT_CONNECTED; - rfcomm_process_connect(s); - break; - - case BT_DISCONN: - /* rfcomm_session_put is called later so don't do - * anything here otherwise we will mess up the session - * reference counter: - * - * (a) when we are the initiator dlc_unlink will drive - * the reference counter to 0 (there is no initial put - * after session_add) - * - * (b) when we are not the initiator rfcomm_rx_process - * will explicitly call put to balance the initial hold - * done after session add. - */ - break; - } - } - return 0; -} - -static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci) -{ - int err = 0; - - BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); - - if (dlci) { - /* Data DLC */ - struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); - if (d) { - if (d->state == BT_CONNECT || d->state == BT_CONFIG) - err = ECONNREFUSED; - else - err = ECONNRESET; - - d->state = BT_CLOSED; - __rfcomm_dlc_close(d, err); - } - } else { - if (s->state == BT_CONNECT) - err = ECONNREFUSED; - else - err = ECONNRESET; - - s->state = BT_CLOSED; - rfcomm_session_close(s, err); - } - return 0; -} - -static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci) -{ - int err = 0; - - BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); - - if (dlci) { - struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); - if (d) { - rfcomm_send_ua(s, dlci); - - if (d->state == BT_CONNECT || d->state == BT_CONFIG) - err = ECONNREFUSED; - else - err = ECONNRESET; - - d->state = BT_CLOSED; - __rfcomm_dlc_close(d, err); - } else - rfcomm_send_dm(s, dlci); - - } else { - rfcomm_send_ua(s, 0); - - if (s->state == BT_CONNECT) - err = ECONNREFUSED; - else - err = ECONNRESET; - - s->state = BT_CLOSED; - rfcomm_session_close(s, err); - } - - return 0; -} - -void rfcomm_dlc_accept(struct rfcomm_dlc *d) -{ - struct sock *sk = d->session->sock->sk; - struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; - - BT_DBG("dlc %p", d); - - rfcomm_send_ua(d->session, d->dlci); - - rfcomm_dlc_clear_timer(d); - - rfcomm_dlc_lock(d); - d->state = BT_CONNECTED; - d->state_change(d, 0); - rfcomm_dlc_unlock(d); - - if (d->role_switch) - hci_conn_switch_role(conn->hcon, 0x00); - - rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); -} - -static void rfcomm_check_accept(struct rfcomm_dlc *d) -{ - if (rfcomm_check_security(d)) { - if (d->defer_setup) { - set_bit(RFCOMM_DEFER_SETUP, &d->flags); - rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); - - rfcomm_dlc_lock(d); - d->state = BT_CONNECT2; - d->state_change(d, 0); - rfcomm_dlc_unlock(d); - } else - rfcomm_dlc_accept(d); - } else { - set_bit(RFCOMM_AUTH_PENDING, &d->flags); - rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); - } -} - -static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci) -{ - struct rfcomm_dlc *d; - u8 channel; - - BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); - - if (!dlci) { - rfcomm_send_ua(s, 0); - - if (s->state == BT_OPEN) { - s->state = BT_CONNECTED; - rfcomm_process_connect(s); - } - return 0; - } - - /* Check if DLC exists */ - d = rfcomm_dlc_get(s, dlci); - if (d) { - if (d->state == BT_OPEN) { - /* DLC was previously opened by PN request */ - rfcomm_check_accept(d); - } - return 0; - } - - /* Notify socket layer about incoming connection */ - channel = __srv_channel(dlci); - if (rfcomm_connect_ind(s, channel, &d)) { - d->dlci = dlci; - d->addr = __addr(s->initiator, dlci); - rfcomm_dlc_link(s, d); - - rfcomm_check_accept(d); - } else { - rfcomm_send_dm(s, dlci); - } - - return 0; -} - -static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn) -{ - struct rfcomm_session *s = d->session; - - BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", - d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits); - - if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) || - pn->flow_ctrl == 0xe0) { - d->cfc = RFCOMM_CFC_ENABLED; - d->tx_credits = pn->credits; - } else { - d->cfc = RFCOMM_CFC_DISABLED; - set_bit(RFCOMM_TX_THROTTLED, &d->flags); - } - - if (s->cfc == RFCOMM_CFC_UNKNOWN) - s->cfc = d->cfc; - - d->priority = pn->priority; - - d->mtu = __le16_to_cpu(pn->mtu); - - if (cr && d->mtu > s->mtu) - d->mtu = s->mtu; - - return 0; -} - -static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb) -{ - struct rfcomm_pn *pn = (void *) skb->data; - struct rfcomm_dlc *d; - u8 dlci = pn->dlci; - - BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); - - if (!dlci) - return 0; - - d = rfcomm_dlc_get(s, dlci); - if (d) { - if (cr) { - /* PN request */ - rfcomm_apply_pn(d, cr, pn); - rfcomm_send_pn(s, 0, d); - } else { - /* PN response */ - switch (d->state) { - case BT_CONFIG: - rfcomm_apply_pn(d, cr, pn); - - d->state = BT_CONNECT; - rfcomm_send_sabm(s, d->dlci); - break; - } - } - } else { - u8 channel = __srv_channel(dlci); - - if (!cr) - return 0; - - /* PN request for non existing DLC. - * Assume incoming connection. */ - if (rfcomm_connect_ind(s, channel, &d)) { - d->dlci = dlci; - d->addr = __addr(s->initiator, dlci); - rfcomm_dlc_link(s, d); - - rfcomm_apply_pn(d, cr, pn); - - d->state = BT_OPEN; - rfcomm_send_pn(s, 0, d); - } else { - rfcomm_send_dm(s, dlci); - } - } - return 0; -} - -static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb) -{ - struct rfcomm_rpn *rpn = (void *) skb->data; - u8 dlci = __get_dlci(rpn->dlci); - - u8 bit_rate = 0; - u8 data_bits = 0; - u8 stop_bits = 0; - u8 parity = 0; - u8 flow_ctrl = 0; - u8 xon_char = 0; - u8 xoff_char = 0; - u16 rpn_mask = RFCOMM_RPN_PM_ALL; - - BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x", - dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl, - rpn->xon_char, rpn->xoff_char, rpn->param_mask); - - if (!cr) - return 0; - - if (len == 1) { - /* This is a request, return default (according to ETSI TS 07.10) settings */ - bit_rate = RFCOMM_RPN_BR_9600; - data_bits = RFCOMM_RPN_DATA_8; - stop_bits = RFCOMM_RPN_STOP_1; - parity = RFCOMM_RPN_PARITY_NONE; - flow_ctrl = RFCOMM_RPN_FLOW_NONE; - xon_char = RFCOMM_RPN_XON_CHAR; - xoff_char = RFCOMM_RPN_XOFF_CHAR; - goto rpn_out; - } - - /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit, - * no parity, no flow control lines, normal XON/XOFF chars */ - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) { - bit_rate = rpn->bit_rate; - if (bit_rate > RFCOMM_RPN_BR_230400) { - BT_DBG("RPN bit rate mismatch 0x%x", bit_rate); - bit_rate = RFCOMM_RPN_BR_9600; - rpn_mask ^= RFCOMM_RPN_PM_BITRATE; - } - } - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) { - data_bits = __get_rpn_data_bits(rpn->line_settings); - if (data_bits != RFCOMM_RPN_DATA_8) { - BT_DBG("RPN data bits mismatch 0x%x", data_bits); - data_bits = RFCOMM_RPN_DATA_8; - rpn_mask ^= RFCOMM_RPN_PM_DATA; - } - } - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) { - stop_bits = __get_rpn_stop_bits(rpn->line_settings); - if (stop_bits != RFCOMM_RPN_STOP_1) { - BT_DBG("RPN stop bits mismatch 0x%x", stop_bits); - stop_bits = RFCOMM_RPN_STOP_1; - rpn_mask ^= RFCOMM_RPN_PM_STOP; - } - } - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) { - parity = __get_rpn_parity(rpn->line_settings); - if (parity != RFCOMM_RPN_PARITY_NONE) { - BT_DBG("RPN parity mismatch 0x%x", parity); - parity = RFCOMM_RPN_PARITY_NONE; - rpn_mask ^= RFCOMM_RPN_PM_PARITY; - } - } - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) { - flow_ctrl = rpn->flow_ctrl; - if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) { - BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl); - flow_ctrl = RFCOMM_RPN_FLOW_NONE; - rpn_mask ^= RFCOMM_RPN_PM_FLOW; - } - } - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) { - xon_char = rpn->xon_char; - if (xon_char != RFCOMM_RPN_XON_CHAR) { - BT_DBG("RPN XON char mismatch 0x%x", xon_char); - xon_char = RFCOMM_RPN_XON_CHAR; - rpn_mask ^= RFCOMM_RPN_PM_XON; - } - } - - if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) { - xoff_char = rpn->xoff_char; - if (xoff_char != RFCOMM_RPN_XOFF_CHAR) { - BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char); - xoff_char = RFCOMM_RPN_XOFF_CHAR; - rpn_mask ^= RFCOMM_RPN_PM_XOFF; - } - } - -rpn_out: - rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits, - parity, flow_ctrl, xon_char, xoff_char, rpn_mask); - - return 0; -} - -static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb) -{ - struct rfcomm_rls *rls = (void *) skb->data; - u8 dlci = __get_dlci(rls->dlci); - - BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status); - - if (!cr) - return 0; - - /* We should probably do something with this information here. But - * for now it's sufficient just to reply -- Bluetooth 1.1 says it's - * mandatory to recognise and respond to RLS */ - - rfcomm_send_rls(s, 0, dlci, rls->status); - - return 0; -} - -static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb) -{ - struct rfcomm_msc *msc = (void *) skb->data; - struct rfcomm_dlc *d; - u8 dlci = __get_dlci(msc->dlci); - - BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig); - - d = rfcomm_dlc_get(s, dlci); - if (!d) - return 0; - - if (cr) { - if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc) - set_bit(RFCOMM_TX_THROTTLED, &d->flags); - else - clear_bit(RFCOMM_TX_THROTTLED, &d->flags); - - rfcomm_dlc_lock(d); - - d->remote_v24_sig = msc->v24_sig; - - if (d->modem_status) - d->modem_status(d, msc->v24_sig); - - rfcomm_dlc_unlock(d); - - rfcomm_send_msc(s, 0, dlci, msc->v24_sig); - - d->mscex |= RFCOMM_MSCEX_RX; - } else - d->mscex |= RFCOMM_MSCEX_TX; - - return 0; -} - -static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb) -{ - struct rfcomm_mcc *mcc = (void *) skb->data; - u8 type, cr, len; - - cr = __test_cr(mcc->type); - type = __get_mcc_type(mcc->type); - len = __get_mcc_len(mcc->len); - - BT_DBG("%p type 0x%x cr %d", s, type, cr); - - skb_pull(skb, 2); - - switch (type) { - case RFCOMM_PN: - rfcomm_recv_pn(s, cr, skb); - break; - - case RFCOMM_RPN: - rfcomm_recv_rpn(s, cr, len, skb); - break; - - case RFCOMM_RLS: - rfcomm_recv_rls(s, cr, skb); - break; - - case RFCOMM_MSC: - rfcomm_recv_msc(s, cr, skb); - break; - - case RFCOMM_FCOFF: - if (cr) { - set_bit(RFCOMM_TX_THROTTLED, &s->flags); - rfcomm_send_fcoff(s, 0); - } - break; - - case RFCOMM_FCON: - if (cr) { - clear_bit(RFCOMM_TX_THROTTLED, &s->flags); - rfcomm_send_fcon(s, 0); - } - break; - - case RFCOMM_TEST: - if (cr) - rfcomm_send_test(s, 0, skb->data, skb->len); - break; - - case RFCOMM_NSC: - break; - - default: - BT_ERR("Unknown control type 0x%02x", type); - rfcomm_send_nsc(s, cr, type); - break; - } - return 0; -} - -static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb) -{ - struct rfcomm_dlc *d; - - BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf); - - d = rfcomm_dlc_get(s, dlci); - if (!d) { - rfcomm_send_dm(s, dlci); - goto drop; - } - - if (pf && d->cfc) { - u8 credits = *(u8 *) skb->data; skb_pull(skb, 1); - - d->tx_credits += credits; - if (d->tx_credits) - clear_bit(RFCOMM_TX_THROTTLED, &d->flags); - } - - if (skb->len && d->state == BT_CONNECTED) { - rfcomm_dlc_lock(d); - d->rx_credits--; - d->data_ready(d, skb); - rfcomm_dlc_unlock(d); - return 0; - } - -drop: - kfree_skb(skb); - return 0; -} - -static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb) -{ - struct rfcomm_hdr *hdr = (void *) skb->data; - u8 type, dlci, fcs; - - dlci = __get_dlci(hdr->addr); - type = __get_type(hdr->ctrl); - - /* Trim FCS */ - skb->len--; skb->tail--; - fcs = *(u8 *)skb_tail_pointer(skb); - - if (__check_fcs(skb->data, type, fcs)) { - BT_ERR("bad checksum in packet"); - kfree_skb(skb); - return -EILSEQ; - } - - if (__test_ea(hdr->len)) - skb_pull(skb, 3); - else - skb_pull(skb, 4); - - switch (type) { - case RFCOMM_SABM: - if (__test_pf(hdr->ctrl)) - rfcomm_recv_sabm(s, dlci); - break; - - case RFCOMM_DISC: - if (__test_pf(hdr->ctrl)) - rfcomm_recv_disc(s, dlci); - break; - - case RFCOMM_UA: - if (__test_pf(hdr->ctrl)) - rfcomm_recv_ua(s, dlci); - break; - - case RFCOMM_DM: - rfcomm_recv_dm(s, dlci); - break; - - case RFCOMM_UIH: - if (dlci) - return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb); - - rfcomm_recv_mcc(s, skb); - break; - - default: - BT_ERR("Unknown packet type 0x%02x", type); - break; - } - kfree_skb(skb); - return 0; -} - -/* ---- Connection and data processing ---- */ - -static void rfcomm_process_connect(struct rfcomm_session *s) -{ - struct rfcomm_dlc *d; - struct list_head *p, *n; - - BT_DBG("session %p state %ld", s, s->state); - - list_for_each_safe(p, n, &s->dlcs) { - d = list_entry(p, struct rfcomm_dlc, list); - if (d->state == BT_CONFIG) { - d->mtu = s->mtu; - if (rfcomm_check_security(d)) { - rfcomm_send_pn(s, 1, d); - } else { - set_bit(RFCOMM_AUTH_PENDING, &d->flags); - rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); - } - } - } -} - -/* Send data queued for the DLC. - * Return number of frames left in the queue. - */ -static inline int rfcomm_process_tx(struct rfcomm_dlc *d) -{ - struct sk_buff *skb; - int err; - - BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d", - d, d->state, d->cfc, d->rx_credits, d->tx_credits); - - /* Send pending MSC */ - if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags)) - rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); - - if (d->cfc) { - /* CFC enabled. - * Give them some credits */ - if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) && - d->rx_credits <= (d->cfc >> 2)) { - rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits); - d->rx_credits = d->cfc; - } - } else { - /* CFC disabled. - * Give ourselves some credits */ - d->tx_credits = 5; - } - - if (test_bit(RFCOMM_TX_THROTTLED, &d->flags)) - return skb_queue_len(&d->tx_queue); - - while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) { - err = rfcomm_send_frame(d->session, skb->data, skb->len); - if (err < 0) { - skb_queue_head(&d->tx_queue, skb); - break; - } - kfree_skb(skb); - d->tx_credits--; - } - - if (d->cfc && !d->tx_credits) { - /* We're out of TX credits. - * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */ - set_bit(RFCOMM_TX_THROTTLED, &d->flags); - } - - return skb_queue_len(&d->tx_queue); -} - -static inline void rfcomm_process_dlcs(struct rfcomm_session *s) -{ - struct rfcomm_dlc *d; - struct list_head *p, *n; - - BT_DBG("session %p state %ld", s, s->state); - - list_for_each_safe(p, n, &s->dlcs) { - d = list_entry(p, struct rfcomm_dlc, list); - - if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) { - __rfcomm_dlc_close(d, ETIMEDOUT); - continue; - } - - if (test_bit(RFCOMM_ENC_DROP, &d->flags)) { - __rfcomm_dlc_close(d, ECONNREFUSED); - continue; - } - - if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) { - rfcomm_dlc_clear_timer(d); - if (d->out) { - rfcomm_send_pn(s, 1, d); - rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); - } else { - if (d->defer_setup) { - set_bit(RFCOMM_DEFER_SETUP, &d->flags); - rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); - - rfcomm_dlc_lock(d); - d->state = BT_CONNECT2; - d->state_change(d, 0); - rfcomm_dlc_unlock(d); - } else - rfcomm_dlc_accept(d); - } - continue; - } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { - rfcomm_dlc_clear_timer(d); - if (!d->out) - rfcomm_send_dm(s, d->dlci); - else - d->state = BT_CLOSED; - __rfcomm_dlc_close(d, ECONNREFUSED); - continue; - } - - if (test_bit(RFCOMM_SEC_PENDING, &d->flags)) - continue; - - if (test_bit(RFCOMM_TX_THROTTLED, &s->flags)) - continue; - - if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) && - d->mscex == RFCOMM_MSCEX_OK) - rfcomm_process_tx(d); - } -} - -static inline void rfcomm_process_rx(struct rfcomm_session *s) -{ - struct socket *sock = s->sock; - struct sock *sk = sock->sk; - struct sk_buff *skb; - - BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue)); - - /* Get data directly from socket receive queue without copying it. */ - while ((skb = skb_dequeue(&sk->sk_receive_queue))) { - skb_orphan(skb); - if (!skb_linearize(skb)) - rfcomm_recv_frame(s, skb); - else - kfree_skb(skb); - } - - if (sk->sk_state == BT_CLOSED) { - if (!s->initiator) - rfcomm_session_put(s); - - rfcomm_session_close(s, sk->sk_err); - } -} - -static inline void rfcomm_accept_connection(struct rfcomm_session *s) -{ - struct socket *sock = s->sock, *nsock; - int err; - - /* Fast check for a new connection. - * Avoids unnesesary socket allocations. */ - if (list_empty(&bt_sk(sock->sk)->accept_q)) - return; - - BT_DBG("session %p", s); - - err = kernel_accept(sock, &nsock, O_NONBLOCK); - if (err < 0) - return; - - /* Set our callbacks */ - nsock->sk->sk_data_ready = rfcomm_l2data_ready; - nsock->sk->sk_state_change = rfcomm_l2state_change; - - s = rfcomm_session_add(nsock, BT_OPEN); - if (s) { - rfcomm_session_hold(s); - - /* We should adjust MTU on incoming sessions. - * L2CAP MTU minus UIH header and FCS. */ - s->mtu = min(l2cap_pi(nsock->sk)->chan->omtu, - l2cap_pi(nsock->sk)->chan->imtu) - 5; - - rfcomm_schedule(); - } else - sock_release(nsock); -} - -static inline void rfcomm_check_connection(struct rfcomm_session *s) -{ - struct sock *sk = s->sock->sk; - - BT_DBG("%p state %ld", s, s->state); - - switch (sk->sk_state) { - case BT_CONNECTED: - s->state = BT_CONNECT; - - /* We can adjust MTU on outgoing sessions. - * L2CAP MTU minus UIH header and FCS. */ - s->mtu = min(l2cap_pi(sk)->chan->omtu, l2cap_pi(sk)->chan->imtu) - 5; - - rfcomm_send_sabm(s, 0); - break; - - case BT_CLOSED: - s->state = BT_CLOSED; - rfcomm_session_close(s, sk->sk_err); - break; - } -} - -static inline void rfcomm_process_sessions(void) -{ - struct list_head *p, *n; - - rfcomm_lock(); - - list_for_each_safe(p, n, &session_list) { - struct rfcomm_session *s; - s = list_entry(p, struct rfcomm_session, list); - - if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) { - s->state = BT_DISCONN; - rfcomm_send_disc(s, 0); - rfcomm_session_put(s); - continue; - } - - if (s->state == BT_LISTEN) { - rfcomm_accept_connection(s); - continue; - } - - rfcomm_session_hold(s); - - switch (s->state) { - case BT_BOUND: - rfcomm_check_connection(s); - break; - - default: - rfcomm_process_rx(s); - break; - } - - rfcomm_process_dlcs(s); - - rfcomm_session_put(s); - } - - rfcomm_unlock(); -} - -static int rfcomm_add_listener(bdaddr_t *ba) -{ - struct sockaddr_l2 addr; - struct socket *sock; - struct sock *sk; - struct rfcomm_session *s; - int err = 0; - - /* Create socket */ - err = rfcomm_l2sock_create(&sock); - if (err < 0) { - BT_ERR("Create socket failed %d", err); - return err; - } - - /* Bind socket */ - bacpy(&addr.l2_bdaddr, ba); - addr.l2_family = AF_BLUETOOTH; - addr.l2_psm = cpu_to_le16(RFCOMM_PSM); - addr.l2_cid = 0; - err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); - if (err < 0) { - BT_ERR("Bind failed %d", err); - goto failed; - } - - /* Set L2CAP options */ - sk = sock->sk; - lock_sock(sk); - l2cap_pi(sk)->chan->imtu = l2cap_mtu; - release_sock(sk); - - /* Start listening on the socket */ - err = kernel_listen(sock, 10); - if (err) { - BT_ERR("Listen failed %d", err); - goto failed; - } - - /* Add listening session */ - s = rfcomm_session_add(sock, BT_LISTEN); - if (!s) - goto failed; - - rfcomm_session_hold(s); - return 0; -failed: - sock_release(sock); - return err; -} - -static void rfcomm_kill_listener(void) -{ - struct rfcomm_session *s; - struct list_head *p, *n; - - BT_DBG(""); - - list_for_each_safe(p, n, &session_list) { - s = list_entry(p, struct rfcomm_session, list); - rfcomm_session_del(s); - } -} - -static int rfcomm_run(void *unused) -{ - BT_DBG(""); - - set_user_nice(current, -10); - - rfcomm_add_listener(BDADDR_ANY); - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - - if (kthread_should_stop()) - break; - - /* Process stuff */ - rfcomm_process_sessions(); - - schedule(); - } - __set_current_state(TASK_RUNNING); - - rfcomm_kill_listener(); - - return 0; -} - -static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt) -{ - struct rfcomm_session *s; - struct rfcomm_dlc *d; - struct list_head *p, *n; - - BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt); - - s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); - if (!s) - return; - - rfcomm_session_hold(s); - - list_for_each_safe(p, n, &s->dlcs) { - d = list_entry(p, struct rfcomm_dlc, list); - - if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) { - rfcomm_dlc_clear_timer(d); - if (status || encrypt == 0x00) { - set_bit(RFCOMM_ENC_DROP, &d->flags); - continue; - } - } - - if (d->state == BT_CONNECTED && !status && encrypt == 0x00) { - if (d->sec_level == BT_SECURITY_MEDIUM) { - set_bit(RFCOMM_SEC_PENDING, &d->flags); - rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); - continue; - } else if (d->sec_level == BT_SECURITY_HIGH) { - set_bit(RFCOMM_ENC_DROP, &d->flags); - continue; - } - } - - if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) - continue; - - if (!status && hci_conn_check_secure(conn, d->sec_level)) - set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); - else - set_bit(RFCOMM_AUTH_REJECT, &d->flags); - } - - rfcomm_session_put(s); - - rfcomm_schedule(); -} - -static struct hci_cb rfcomm_cb = { - .name = "RFCOMM", - .security_cfm = rfcomm_security_cfm -}; - -static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x) -{ - struct rfcomm_session *s; - - rfcomm_lock(); - - list_for_each_entry(s, &session_list, list) { - struct rfcomm_dlc *d; - list_for_each_entry(d, &s->dlcs, list) { - struct sock *sk = s->sock->sk; - - seq_printf(f, "%s %s %ld %d %d %d %d\n", - batostr(&bt_sk(sk)->src), - batostr(&bt_sk(sk)->dst), - d->state, d->dlci, d->mtu, - d->rx_credits, d->tx_credits); - } - } - - rfcomm_unlock(); - - return 0; -} - -static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private); -} - -static const struct file_operations rfcomm_dlc_debugfs_fops = { - .open = rfcomm_dlc_debugfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct dentry *rfcomm_dlc_debugfs; - -/* ---- Initialization ---- */ -static int __init rfcomm_init(void) -{ - int err; - - hci_register_cb(&rfcomm_cb); - - rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd"); - if (IS_ERR(rfcomm_thread)) { - err = PTR_ERR(rfcomm_thread); - goto unregister; - } - - if (bt_debugfs) { - rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444, - bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops); - if (!rfcomm_dlc_debugfs) - BT_ERR("Failed to create RFCOMM debug file"); - } - - err = rfcomm_init_ttys(); - if (err < 0) - goto stop; - - err = rfcomm_init_sockets(); - if (err < 0) - goto cleanup; - - BT_INFO("RFCOMM ver %s", VERSION); - - return 0; - -cleanup: - rfcomm_cleanup_ttys(); - -stop: - kthread_stop(rfcomm_thread); - -unregister: - hci_unregister_cb(&rfcomm_cb); - - return err; -} - -static void __exit rfcomm_exit(void) -{ - debugfs_remove(rfcomm_dlc_debugfs); - - hci_unregister_cb(&rfcomm_cb); - - kthread_stop(rfcomm_thread); - - rfcomm_cleanup_ttys(); - - rfcomm_cleanup_sockets(); -} - -module_init(rfcomm_init); -module_exit(rfcomm_exit); - -module_param(disable_cfc, bool, 0644); -MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); - -module_param(channel_mtu, int, 0644); -MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); - -module_param(l2cap_mtu, uint, 0644); -MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); - -module_param(l2cap_ertm, bool, 0644); -MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection"); - -MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); -MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION); -MODULE_VERSION(VERSION); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("bt-proto-3"); diff --git a/net/bluetooth_tizen/rfcomm/sock.c b/net/bluetooth_tizen/rfcomm/sock.c deleted file mode 100644 index 22169c3..0000000 --- a/net/bluetooth_tizen/rfcomm/sock.c +++ /dev/null @@ -1,1078 +0,0 @@ -/* - RFCOMM implementation for Linux Bluetooth stack (BlueZ). - Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> - Copyright (C) 2002 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. -*/ - -/* - * RFCOMM sockets. - */ - -#include <linux/module.h> - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/poll.h> -#include <linux/fcntl.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/socket.h> -#include <linux/skbuff.h> -#include <linux/list.h> -#include <linux/device.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/security.h> -#include <net/sock.h> - -#include <asm/system.h> -#include <linux/uaccess.h> - -#include <net/bluetooth/bluetooth.h> -#include <net/bluetooth/hci_core.h> -#include <net/bluetooth/l2cap.h> -#include <net/bluetooth/rfcomm.h> - -static const struct proto_ops rfcomm_sock_ops; - -static struct bt_sock_list rfcomm_sk_list = { - .lock = __RW_LOCK_UNLOCKED(rfcomm_sk_list.lock) -}; - -static void rfcomm_sock_close(struct sock *sk); -static void rfcomm_sock_kill(struct sock *sk); - -/* ---- DLC callbacks ---- - * - * called under rfcomm_dlc_lock() - */ -static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb) -{ - struct sock *sk = d->owner; - if (!sk) - return; - - atomic_add(skb->len, &sk->sk_rmem_alloc); - skb_queue_tail(&sk->sk_receive_queue, skb); - sk->sk_data_ready(sk, skb->len); - - if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) - rfcomm_dlc_throttle(d); -} - -static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err) -{ - struct sock *sk = d->owner, *parent; - unsigned long flags; - - if (!sk) - return; - - BT_DBG("dlc %p state %ld err %d", d, d->state, err); - - local_irq_save(flags); - bh_lock_sock(sk); - - if (err) - sk->sk_err = err; - - sk->sk_state = d->state; - - parent = bt_sk(sk)->parent; - if (parent) { - if (d->state == BT_CLOSED) { - sock_set_flag(sk, SOCK_ZAPPED); - bt_accept_unlink(sk); - } - parent->sk_data_ready(parent, 0); - } else { - if (d->state == BT_CONNECTED) - rfcomm_session_getaddr(d->session, &bt_sk(sk)->src, NULL); - sk->sk_state_change(sk); - } - - bh_unlock_sock(sk); - local_irq_restore(flags); - - if (parent && sock_flag(sk, SOCK_ZAPPED)) { - /* We have to drop DLC lock here, otherwise - * rfcomm_sock_destruct() will dead lock. */ - rfcomm_dlc_unlock(d); - rfcomm_sock_kill(sk); - rfcomm_dlc_lock(d); - } -} - -/* ---- Socket functions ---- */ -static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src) -{ - struct sock *sk = NULL; - struct hlist_node *node; - - sk_for_each(sk, node, &rfcomm_sk_list.head) { - if (rfcomm_pi(sk)->channel == channel && - !bacmp(&bt_sk(sk)->src, src)) - break; - } - - return node ? sk : NULL; -} - -/* Find socket with channel and source bdaddr. - * Returns closest match. - */ -static struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src) -{ - struct sock *sk = NULL, *sk1 = NULL; - struct hlist_node *node; - - read_lock(&rfcomm_sk_list.lock); - - sk_for_each(sk, node, &rfcomm_sk_list.head) { - if (state && sk->sk_state != state) - continue; - - if (rfcomm_pi(sk)->channel == channel) { - /* Exact match. */ - if (!bacmp(&bt_sk(sk)->src, src)) - break; - - /* Closest match */ - if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) - sk1 = sk; - } - } - - read_unlock(&rfcomm_sk_list.lock); - - return node ? sk : sk1; -} - -static void rfcomm_sock_destruct(struct sock *sk) -{ - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - - BT_DBG("sk %p dlc %p", sk, d); - - skb_queue_purge(&sk->sk_receive_queue); - skb_queue_purge(&sk->sk_write_queue); - - rfcomm_dlc_lock(d); - rfcomm_pi(sk)->dlc = NULL; - - /* Detach DLC if it's owned by this socket */ - if (d->owner == sk) - d->owner = NULL; - rfcomm_dlc_unlock(d); - - rfcomm_dlc_put(d); -} - -static void rfcomm_sock_cleanup_listen(struct sock *parent) -{ - struct sock *sk; - - BT_DBG("parent %p", parent); - - /* Close not yet accepted dlcs */ - while ((sk = bt_accept_dequeue(parent, NULL))) { - rfcomm_sock_close(sk); - rfcomm_sock_kill(sk); - } - - parent->sk_state = BT_CLOSED; - sock_set_flag(parent, SOCK_ZAPPED); -} - -/* Kill socket (only if zapped and orphan) - * Must be called on unlocked socket. - */ -static void rfcomm_sock_kill(struct sock *sk) -{ - if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) - return; - - BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt)); - - /* Kill poor orphan */ - bt_sock_unlink(&rfcomm_sk_list, sk); - sock_set_flag(sk, SOCK_DEAD); - sock_put(sk); -} - -static void __rfcomm_sock_close(struct sock *sk) -{ - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - - BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); - - switch (sk->sk_state) { - case BT_LISTEN: - rfcomm_sock_cleanup_listen(sk); - break; - - case BT_CONNECT: - case BT_CONNECT2: - case BT_CONFIG: - case BT_CONNECTED: - rfcomm_dlc_close(d, 0); - - default: - sock_set_flag(sk, SOCK_ZAPPED); - break; - } -} - -/* Close socket. - * Must be called on unlocked socket. - */ -static void rfcomm_sock_close(struct sock *sk) -{ - lock_sock(sk); - __rfcomm_sock_close(sk); - release_sock(sk); -} - -static void rfcomm_sock_init(struct sock *sk, struct sock *parent) -{ - struct rfcomm_pinfo *pi = rfcomm_pi(sk); - - BT_DBG("sk %p", sk); - - if (parent) { - sk->sk_type = parent->sk_type; - pi->dlc->defer_setup = bt_sk(parent)->defer_setup; - - pi->sec_level = rfcomm_pi(parent)->sec_level; - pi->role_switch = rfcomm_pi(parent)->role_switch; - - security_sk_clone(parent, sk); - } else { - pi->dlc->defer_setup = 0; - - pi->sec_level = BT_SECURITY_LOW; - pi->role_switch = 0; - } - - pi->dlc->sec_level = pi->sec_level; - pi->dlc->role_switch = pi->role_switch; -} - -static struct proto rfcomm_proto = { - .name = "RFCOMM", - .owner = THIS_MODULE, - .obj_size = sizeof(struct rfcomm_pinfo) -}; - -static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) -{ - struct rfcomm_dlc *d; - struct sock *sk; - - sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto); - if (!sk) - return NULL; - - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - - d = rfcomm_dlc_alloc(prio); - if (!d) { - sk_free(sk); - return NULL; - } - - d->data_ready = rfcomm_sk_data_ready; - d->state_change = rfcomm_sk_state_change; - - rfcomm_pi(sk)->dlc = d; - d->owner = sk; - - sk->sk_destruct = rfcomm_sock_destruct; - sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT; - - sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; - sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; - - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - - bt_sock_link(&rfcomm_sk_list, sk); - - BT_DBG("sk %p", sk); - return sk; -} - -static int rfcomm_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_STREAM && sock->type != SOCK_RAW) - return -ESOCKTNOSUPPORT; - - sock->ops = &rfcomm_sock_ops; - - sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC); - if (!sk) - return -ENOMEM; - - rfcomm_sock_init(sk, NULL); - return 0; -} - -static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) -{ - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; - struct sock *sk = sock->sk; - int err = 0; - - BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr)); - - if (!addr || addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - lock_sock(sk); - - if (sk->sk_state != BT_OPEN) { - err = -EBADFD; - goto done; - } - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - write_lock(&rfcomm_sk_list.lock); - - if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) { - err = -EADDRINUSE; - } else { - /* Save source address */ - bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr); - rfcomm_pi(sk)->channel = sa->rc_channel; - sk->sk_state = BT_BOUND; - } - - write_unlock(&rfcomm_sk_list.lock); - -done: - release_sock(sk); - return err; -} - -static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) -{ - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; - struct sock *sk = sock->sk; - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - int err = 0; - - BT_DBG("sk %p", sk); - - if (alen < sizeof(struct sockaddr_rc) || - addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - lock_sock(sk); - - if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) { - err = -EBADFD; - goto done; - } - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - sk->sk_state = BT_CONNECT; - bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr); - rfcomm_pi(sk)->channel = sa->rc_channel; - - d->sec_level = rfcomm_pi(sk)->sec_level; - d->role_switch = rfcomm_pi(sk)->role_switch; - - err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel); - if (!err) - err = bt_sock_wait_state(sk, BT_CONNECTED, - sock_sndtimeo(sk, flags & O_NONBLOCK)); - -done: - release_sock(sk); - return err; -} - -static int rfcomm_sock_listen(struct socket *sock, int backlog) -{ - struct sock *sk = sock->sk; - int err = 0; - - BT_DBG("sk %p backlog %d", sk, backlog); - - lock_sock(sk); - - if (sk->sk_state != BT_BOUND) { - err = -EBADFD; - goto done; - } - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - if (!rfcomm_pi(sk)->channel) { - bdaddr_t *src = &bt_sk(sk)->src; - u8 channel; - - err = -EINVAL; - - write_lock(&rfcomm_sk_list.lock); - - for (channel = 1; channel < 31; channel++) - if (!__rfcomm_get_sock_by_addr(channel, src)) { - rfcomm_pi(sk)->channel = channel; - err = 0; - break; - } - - write_unlock(&rfcomm_sk_list.lock); - - if (err < 0) - goto done; - } - - sk->sk_max_ack_backlog = backlog; - sk->sk_ack_backlog = 0; - sk->sk_state = BT_LISTEN; - -done: - release_sock(sk); - return err; -} - -static int rfcomm_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(sk); - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - 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(sk); - } - __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 rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) -{ - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; - struct sock *sk = sock->sk; - - BT_DBG("sock %p, sk %p", sock, sk); - - sa->rc_family = AF_BLUETOOTH; - sa->rc_channel = rfcomm_pi(sk)->channel; - if (peer) - bacpy(&sa->rc_bdaddr, &bt_sk(sk)->dst); - else - bacpy(&sa->rc_bdaddr, &bt_sk(sk)->src); - - *len = sizeof(struct sockaddr_rc); - return 0; -} - -static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t len) -{ - struct sock *sk = sock->sk; - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - struct sk_buff *skb; - int sent = 0; - - if (test_bit(RFCOMM_DEFER_SETUP, &d->flags)) - return -ENOTCONN; - - if (msg->msg_flags & MSG_OOB) - return -EOPNOTSUPP; - - if (sk->sk_shutdown & SEND_SHUTDOWN) - return -EPIPE; - - BT_DBG("sock %p, sk %p", sock, sk); - - lock_sock(sk); - - while (len) { - size_t size = min_t(size_t, len, d->mtu); - int err; - - skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE, - msg->msg_flags & MSG_DONTWAIT, &err); - if (!skb) { - if (sent == 0) - sent = err; - break; - } - skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE); - - err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size); - if (err) { - kfree_skb(skb); - if (sent == 0) - sent = err; - break; - } - - skb->priority = sk->sk_priority; - - err = rfcomm_dlc_send(d, skb); - if (err < 0) { - kfree_skb(skb); - if (sent == 0) - sent = err; - break; - } - - sent += size; - len -= size; - } - - release_sock(sk); - - return sent; -} - -static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t size, int flags) -{ - struct sock *sk = sock->sk; - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - int len; - - if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { - rfcomm_dlc_accept(d); - return 0; - } - - len = bt_sock_stream_recvmsg(iocb, sock, msg, size, flags); - - lock_sock(sk); - if (!(flags & MSG_PEEK) && len > 0) - atomic_sub(len, &sk->sk_rmem_alloc); - - if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2)) - rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc); - release_sock(sk); - - return len; -} - -static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) -{ - struct sock *sk = sock->sk; - int err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - lock_sock(sk); - - switch (optname) { - case RFCOMM_LM: - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - if (opt & RFCOMM_LM_AUTH) - rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW; - if (opt & RFCOMM_LM_ENCRYPT) - rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM; - if (opt & RFCOMM_LM_SECURE) - rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH; - - rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER); - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) -{ - struct sock *sk = sock->sk; - struct bt_security sec; - int err = 0; - size_t len; - u32 opt; - - BT_DBG("sk %p", sk); - - if (level == SOL_RFCOMM) - return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen); - - if (level != SOL_BLUETOOTH) - return -ENOPROTOOPT; - - lock_sock(sk); - - switch (optname) { - case BT_SECURITY: - if (sk->sk_type != SOCK_STREAM) { - 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_HIGH) { - err = -EINVAL; - break; - } - - rfcomm_pi(sk)->sec_level = sec.level; - 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; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) -{ - struct sock *sk = sock->sk; - struct rfcomm_conninfo cinfo; - struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; - int len, err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - if (get_user(len, optlen)) - return -EFAULT; - - lock_sock(sk); - - switch (optname) { - case RFCOMM_LM: - switch (rfcomm_pi(sk)->sec_level) { - case BT_SECURITY_LOW: - opt = RFCOMM_LM_AUTH; - break; - case BT_SECURITY_MEDIUM: - opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT; - break; - case BT_SECURITY_HIGH: - opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT | - RFCOMM_LM_SECURE; - break; - default: - opt = 0; - break; - } - - if (rfcomm_pi(sk)->role_switch) - opt |= RFCOMM_LM_MASTER; - - if (put_user(opt, (u32 __user *) optval)) - err = -EFAULT; - break; - - case RFCOMM_CONNINFO: - if (sk->sk_state != BT_CONNECTED && - !rfcomm_pi(sk)->dlc->defer_setup) { - err = -ENOTCONN; - break; - } - - memset(&cinfo, 0, sizeof(cinfo)); - cinfo.hci_handle = conn->hcon->handle; - memcpy(cinfo.dev_class, 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 rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) -{ - struct sock *sk = sock->sk; - struct bt_security sec; - int len, err = 0; - - BT_DBG("sk %p", sk); - - if (level == SOL_RFCOMM) - return rfcomm_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 (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - break; - } - - sec.level = rfcomm_pi(sk)->sec_level; - - 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; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) -{ - struct sock *sk __maybe_unused = sock->sk; - int err; - - BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); - - err = bt_sock_ioctl(sock, cmd, arg); - - if (err == -ENOIOCTLCMD) { -#ifdef CONFIG_BT_RFCOMM_TTY - lock_sock(sk); - err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg); - release_sock(sk); -#else - err = -EOPNOTSUPP; -#endif - } - - return err; -} - -static int rfcomm_sock_shutdown(struct socket *sock, int how) -{ - struct sock *sk = sock->sk; - int err = 0; - - BT_DBG("sock %p, sk %p", sock, sk); - - if (!sk) - return 0; - - lock_sock(sk); - if (!sk->sk_shutdown) { - sk->sk_shutdown = SHUTDOWN_MASK; - __rfcomm_sock_close(sk); - - if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) - err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); - } - release_sock(sk); - return err; -} - -static int rfcomm_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 = rfcomm_sock_shutdown(sock, 2); - - sock_orphan(sk); - rfcomm_sock_kill(sk); - return err; -} - -/* ---- RFCOMM core layer callbacks ---- - * - * called under rfcomm_lock() - */ -int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d) -{ - struct sock *sk, *parent; - bdaddr_t src, dst; - int result = 0; - - BT_DBG("session %p channel %d", s, channel); - - rfcomm_session_getaddr(s, &src, &dst); - - /* Check if we have socket listening on channel */ - parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src); - if (!parent) - return 0; - - bh_lock_sock(parent); - - /* Check for backlog size */ - if (sk_acceptq_is_full(parent)) { - BT_DBG("backlog full %d", parent->sk_ack_backlog); - goto done; - } - - sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC); - if (!sk) - goto done; - - bt_sock_reclassify_lock(sk, BTPROTO_RFCOMM); - - rfcomm_sock_init(sk, parent); - bacpy(&bt_sk(sk)->src, &src); - bacpy(&bt_sk(sk)->dst, &dst); - rfcomm_pi(sk)->channel = channel; - - sk->sk_state = BT_CONFIG; - bt_accept_enqueue(parent, sk); - - /* Accept connection and return socket DLC */ - *d = rfcomm_pi(sk)->dlc; - result = 1; - -done: - bh_unlock_sock(parent); - - if (bt_sk(parent)->defer_setup) - parent->sk_state_change(parent); - - return result; -} - -static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p) -{ - struct sock *sk; - struct hlist_node *node; - - read_lock(&rfcomm_sk_list.lock); - - sk_for_each(sk, node, &rfcomm_sk_list.head) { - seq_printf(f, "%s %s %d %d\n", - batostr(&bt_sk(sk)->src), - batostr(&bt_sk(sk)->dst), - sk->sk_state, rfcomm_pi(sk)->channel); - } - - read_unlock(&rfcomm_sk_list.lock); - - return 0; -} - -static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, rfcomm_sock_debugfs_show, inode->i_private); -} - -static const struct file_operations rfcomm_sock_debugfs_fops = { - .open = rfcomm_sock_debugfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct dentry *rfcomm_sock_debugfs; - -static const struct proto_ops rfcomm_sock_ops = { - .family = PF_BLUETOOTH, - .owner = THIS_MODULE, - .release = rfcomm_sock_release, - .bind = rfcomm_sock_bind, - .connect = rfcomm_sock_connect, - .listen = rfcomm_sock_listen, - .accept = rfcomm_sock_accept, - .getname = rfcomm_sock_getname, - .sendmsg = rfcomm_sock_sendmsg, - .recvmsg = rfcomm_sock_recvmsg, - .shutdown = rfcomm_sock_shutdown, - .setsockopt = rfcomm_sock_setsockopt, - .getsockopt = rfcomm_sock_getsockopt, - .ioctl = rfcomm_sock_ioctl, - .poll = bt_sock_poll, - .socketpair = sock_no_socketpair, - .mmap = sock_no_mmap -}; - -static const struct net_proto_family rfcomm_sock_family_ops = { - .family = PF_BLUETOOTH, - .owner = THIS_MODULE, - .create = rfcomm_sock_create -}; - -int __init rfcomm_init_sockets(void) -{ - int err; - - err = proto_register(&rfcomm_proto, 0); - if (err < 0) - return err; - - err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops); - if (err < 0) - goto error; - - if (bt_debugfs) { - rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444, - bt_debugfs, NULL, &rfcomm_sock_debugfs_fops); - if (!rfcomm_sock_debugfs) - BT_ERR("Failed to create RFCOMM debug file"); - } - - BT_INFO("RFCOMM socket layer initialized"); - - return 0; - -error: - BT_ERR("RFCOMM socket layer registration failed"); - proto_unregister(&rfcomm_proto); - return err; -} - -void __exit rfcomm_cleanup_sockets(void) -{ - debugfs_remove(rfcomm_sock_debugfs); - - if (bt_sock_unregister(BTPROTO_RFCOMM) < 0) - BT_ERR("RFCOMM socket layer unregistration failed"); - - proto_unregister(&rfcomm_proto); -} diff --git a/net/bluetooth_tizen/rfcomm/tty.c b/net/bluetooth_tizen/rfcomm/tty.c deleted file mode 100644 index 4bf54b3..0000000 --- a/net/bluetooth_tizen/rfcomm/tty.c +++ /dev/null @@ -1,1188 +0,0 @@ -/* - RFCOMM implementation for Linux Bluetooth stack (BlueZ). - Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> - Copyright (C) 2002 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. -*/ - -/* - * RFCOMM TTY. - */ - -#include <linux/module.h> - -#include <linux/tty.h> -#include <linux/tty_driver.h> -#include <linux/tty_flip.h> - -#include <linux/capability.h> -#include <linux/slab.h> -#include <linux/skbuff.h> -#include <linux/workqueue.h> - -#include <net/bluetooth/bluetooth.h> -#include <net/bluetooth/hci_core.h> -#include <net/bluetooth/rfcomm.h> - -#define RFCOMM_TTY_MAGIC 0x6d02 /* magic number for rfcomm struct */ -#define RFCOMM_TTY_PORTS RFCOMM_MAX_DEV /* whole lotta rfcomm devices */ -#define RFCOMM_TTY_MAJOR 216 /* device node major id of the usb/bluetooth.c driver */ -#define RFCOMM_TTY_MINOR 0 - -static struct tty_driver *rfcomm_tty_driver; - -struct rfcomm_dev { - struct list_head list; - atomic_t refcnt; - - char name[12]; - int id; - unsigned long flags; - atomic_t opened; - int err; - - bdaddr_t src; - bdaddr_t dst; - u8 channel; - - uint modem_status; - - struct rfcomm_dlc *dlc; - struct tty_struct *tty; - wait_queue_head_t wait; - struct work_struct wakeup_task; - - struct device *tty_dev; - - atomic_t wmem_alloc; - - struct sk_buff_head pending; -}; - -static LIST_HEAD(rfcomm_dev_list); -static DEFINE_SPINLOCK(rfcomm_dev_lock); - -static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb); -static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err); -static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig); - -static void rfcomm_tty_wakeup(struct work_struct *work); - -/* ---- Device functions ---- */ -static void rfcomm_dev_destruct(struct rfcomm_dev *dev) -{ - struct rfcomm_dlc *dlc = dev->dlc; - - BT_DBG("dev %p dlc %p", dev, dlc); - - /* Refcount should only hit zero when called from rfcomm_dev_del() - which will have taken us off the list. Everything else are - refcounting bugs. */ - BUG_ON(!list_empty(&dev->list)); - - rfcomm_dlc_lock(dlc); - /* Detach DLC if it's owned by this dev */ - if (dlc->owner == dev) - dlc->owner = NULL; - rfcomm_dlc_unlock(dlc); - - rfcomm_dlc_put(dlc); - - tty_unregister_device(rfcomm_tty_driver, dev->id); - - kfree(dev); - - /* It's safe to call module_put() here because socket still - holds reference to this module. */ - module_put(THIS_MODULE); -} - -static inline void rfcomm_dev_hold(struct rfcomm_dev *dev) -{ - atomic_inc(&dev->refcnt); -} - -static inline void rfcomm_dev_put(struct rfcomm_dev *dev) -{ - /* The reason this isn't actually a race, as you no - doubt have a little voice screaming at you in your - head, is that the refcount should never actually - reach zero unless the device has already been taken - off the list, in rfcomm_dev_del(). And if that's not - true, we'll hit the BUG() in rfcomm_dev_destruct() - anyway. */ - if (atomic_dec_and_test(&dev->refcnt)) - rfcomm_dev_destruct(dev); -} - -static struct rfcomm_dev *__rfcomm_dev_get(int id) -{ - struct rfcomm_dev *dev; - - list_for_each_entry(dev, &rfcomm_dev_list, list) - if (dev->id == id) - return dev; - - return NULL; -} - -static inline struct rfcomm_dev *rfcomm_dev_get(int id) -{ - struct rfcomm_dev *dev; - - spin_lock(&rfcomm_dev_lock); - - dev = __rfcomm_dev_get(id); - - if (dev) { - if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) - dev = NULL; - else - rfcomm_dev_hold(dev); - } - - spin_unlock(&rfcomm_dev_lock); - - return dev; -} - -static struct device *rfcomm_get_device(struct rfcomm_dev *dev) -{ - struct hci_dev *hdev; - struct hci_conn *conn; - - hdev = hci_get_route(&dev->dst, &dev->src); - if (!hdev) - return NULL; - - conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &dev->dst); - - hci_dev_put(hdev); - - return conn ? &conn->dev : NULL; -} - -static ssize_t show_address(struct device *tty_dev, struct device_attribute *attr, char *buf) -{ - struct rfcomm_dev *dev = dev_get_drvdata(tty_dev); - return sprintf(buf, "%s\n", batostr(&dev->dst)); -} - -static ssize_t show_channel(struct device *tty_dev, struct device_attribute *attr, char *buf) -{ - struct rfcomm_dev *dev = dev_get_drvdata(tty_dev); - return sprintf(buf, "%d\n", dev->channel); -} - -static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); -static DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL); - -static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) -{ - struct rfcomm_dev *dev, *entry; - struct list_head *head = &rfcomm_dev_list; - int err = 0; - - BT_DBG("id %d channel %d", req->dev_id, req->channel); - - dev = kzalloc(sizeof(struct rfcomm_dev), GFP_KERNEL); - if (!dev) - return -ENOMEM; - - spin_lock(&rfcomm_dev_lock); - - if (req->dev_id < 0) { - dev->id = 0; - - list_for_each_entry(entry, &rfcomm_dev_list, list) { - if (entry->id != dev->id) - break; - - dev->id++; - head = &entry->list; - } - } else { - dev->id = req->dev_id; - - list_for_each_entry(entry, &rfcomm_dev_list, list) { - if (entry->id == dev->id) { - err = -EADDRINUSE; - goto out; - } - - if (entry->id > dev->id - 1) - break; - - head = &entry->list; - } - } - - if ((dev->id < 0) || (dev->id > RFCOMM_MAX_DEV - 1)) { - err = -ENFILE; - goto out; - } - - sprintf(dev->name, "rfcomm%d", dev->id); - - list_add(&dev->list, head); - atomic_set(&dev->refcnt, 1); - - bacpy(&dev->src, &req->src); - bacpy(&dev->dst, &req->dst); - dev->channel = req->channel; - - dev->flags = req->flags & - ((1 << RFCOMM_RELEASE_ONHUP) | (1 << RFCOMM_REUSE_DLC)); - - atomic_set(&dev->opened, 0); - - init_waitqueue_head(&dev->wait); - INIT_WORK(&dev->wakeup_task, rfcomm_tty_wakeup); - - skb_queue_head_init(&dev->pending); - - rfcomm_dlc_lock(dlc); - - if (req->flags & (1 << RFCOMM_REUSE_DLC)) { - struct sock *sk = dlc->owner; - struct sk_buff *skb; - - BUG_ON(!sk); - - rfcomm_dlc_throttle(dlc); - - while ((skb = skb_dequeue(&sk->sk_receive_queue))) { - skb_orphan(skb); - skb_queue_tail(&dev->pending, skb); - atomic_sub(skb->len, &sk->sk_rmem_alloc); - } - } - - dlc->data_ready = rfcomm_dev_data_ready; - dlc->state_change = rfcomm_dev_state_change; - dlc->modem_status = rfcomm_dev_modem_status; - - dlc->owner = dev; - dev->dlc = dlc; - - rfcomm_dev_modem_status(dlc, dlc->remote_v24_sig); - - rfcomm_dlc_unlock(dlc); - - /* It's safe to call __module_get() here because socket already - holds reference to this module. */ - __module_get(THIS_MODULE); - -out: - spin_unlock(&rfcomm_dev_lock); - - if (err < 0) - goto free; - - dev->tty_dev = tty_register_device(rfcomm_tty_driver, dev->id, NULL); - - if (IS_ERR(dev->tty_dev)) { - err = PTR_ERR(dev->tty_dev); - list_del(&dev->list); - goto free; - } - - dev_set_drvdata(dev->tty_dev, dev); - - if (device_create_file(dev->tty_dev, &dev_attr_address) < 0) - BT_ERR("Failed to create address attribute"); - - if (device_create_file(dev->tty_dev, &dev_attr_channel) < 0) - BT_ERR("Failed to create channel attribute"); - - return dev->id; - -free: - kfree(dev); - return err; -} - -static void rfcomm_dev_del(struct rfcomm_dev *dev) -{ - BT_DBG("dev %p", dev); - - BUG_ON(test_and_set_bit(RFCOMM_TTY_RELEASED, &dev->flags)); - - if (atomic_read(&dev->opened) > 0) - return; - - spin_lock(&rfcomm_dev_lock); - list_del_init(&dev->list); - spin_unlock(&rfcomm_dev_lock); - - rfcomm_dev_put(dev); -} - -/* ---- Send buffer ---- */ -static inline unsigned int rfcomm_room(struct rfcomm_dlc *dlc) -{ - /* We can't let it be zero, because we don't get a callback - when tx_credits becomes nonzero, hence we'd never wake up */ - return dlc->mtu * (dlc->tx_credits?:1); -} - -static void rfcomm_wfree(struct sk_buff *skb) -{ - struct rfcomm_dev *dev = (void *) skb->sk; - atomic_sub(skb->truesize, &dev->wmem_alloc); - if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags)) - queue_work(system_nrt_wq, &dev->wakeup_task); - rfcomm_dev_put(dev); -} - -static inline void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *dev) -{ - rfcomm_dev_hold(dev); - atomic_add(skb->truesize, &dev->wmem_alloc); - skb->sk = (void *) dev; - skb->destructor = rfcomm_wfree; -} - -static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, gfp_t priority) -{ - if (atomic_read(&dev->wmem_alloc) < rfcomm_room(dev->dlc)) { - struct sk_buff *skb = alloc_skb(size, priority); - if (skb) { - rfcomm_set_owner_w(skb, dev); - return skb; - } - } - return NULL; -} - -/* ---- Device IOCTLs ---- */ - -#define NOCAP_FLAGS ((1 << RFCOMM_REUSE_DLC) | (1 << RFCOMM_RELEASE_ONHUP)) - -static int rfcomm_create_dev(struct sock *sk, void __user *arg) -{ - struct rfcomm_dev_req req; - struct rfcomm_dlc *dlc; - int id; - - if (copy_from_user(&req, arg, sizeof(req))) - return -EFAULT; - - BT_DBG("sk %p dev_id %d flags 0x%x", sk, req.dev_id, req.flags); - - if (req.flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) - return -EPERM; - - if (req.flags & (1 << RFCOMM_REUSE_DLC)) { - /* Socket must be connected */ - if (sk->sk_state != BT_CONNECTED) - return -EBADFD; - - dlc = rfcomm_pi(sk)->dlc; - rfcomm_dlc_hold(dlc); - } else { - dlc = rfcomm_dlc_alloc(GFP_KERNEL); - if (!dlc) - return -ENOMEM; - } - - id = rfcomm_dev_add(&req, dlc); - if (id < 0) { - rfcomm_dlc_put(dlc); - return id; - } - - if (req.flags & (1 << RFCOMM_REUSE_DLC)) { - /* DLC is now used by device. - * Socket must be disconnected */ - sk->sk_state = BT_CLOSED; - } - - return id; -} - -static int rfcomm_release_dev(void __user *arg) -{ - struct rfcomm_dev_req req; - struct rfcomm_dev *dev; - - if (copy_from_user(&req, arg, sizeof(req))) - return -EFAULT; - - BT_DBG("dev_id %d flags 0x%x", req.dev_id, req.flags); - - dev = rfcomm_dev_get(req.dev_id); - if (!dev) - return -ENODEV; - - if (dev->flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) { - rfcomm_dev_put(dev); - return -EPERM; - } - - if (req.flags & (1 << RFCOMM_HANGUP_NOW)) - rfcomm_dlc_close(dev->dlc, 0); - - /* Shut down TTY synchronously before freeing rfcomm_dev */ - if (dev->tty) - tty_vhangup(dev->tty); - - if (!test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) - rfcomm_dev_del(dev); - rfcomm_dev_put(dev); - return 0; -} - -static int rfcomm_get_dev_list(void __user *arg) -{ - struct rfcomm_dev *dev; - struct rfcomm_dev_list_req *dl; - struct rfcomm_dev_info *di; - int n = 0, size, err; - u16 dev_num; - - BT_DBG(""); - - if (get_user(dev_num, (u16 __user *) arg)) - return -EFAULT; - - if (!dev_num || dev_num > (PAGE_SIZE * 4) / sizeof(*di)) - return -EINVAL; - - size = sizeof(*dl) + dev_num * sizeof(*di); - - dl = kmalloc(size, GFP_KERNEL); - if (!dl) - return -ENOMEM; - - di = dl->dev_info; - - spin_lock(&rfcomm_dev_lock); - - list_for_each_entry(dev, &rfcomm_dev_list, list) { - if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) - continue; - (di + n)->id = dev->id; - (di + n)->flags = dev->flags; - (di + n)->state = dev->dlc->state; - (di + n)->channel = dev->channel; - bacpy(&(di + n)->src, &dev->src); - bacpy(&(di + n)->dst, &dev->dst); - if (++n >= dev_num) - break; - } - - spin_unlock(&rfcomm_dev_lock); - - dl->dev_num = n; - size = sizeof(*dl) + n * sizeof(*di); - - err = copy_to_user(arg, dl, size); - kfree(dl); - - return err ? -EFAULT : 0; -} - -static int rfcomm_get_dev_info(void __user *arg) -{ - struct rfcomm_dev *dev; - struct rfcomm_dev_info di; - int err = 0; - - BT_DBG(""); - - if (copy_from_user(&di, arg, sizeof(di))) - return -EFAULT; - - dev = rfcomm_dev_get(di.id); - if (!dev) - return -ENODEV; - - di.flags = dev->flags; - di.channel = dev->channel; - di.state = dev->dlc->state; - bacpy(&di.src, &dev->src); - bacpy(&di.dst, &dev->dst); - - if (copy_to_user(arg, &di, sizeof(di))) - err = -EFAULT; - - rfcomm_dev_put(dev); - return err; -} - -int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) -{ - BT_DBG("cmd %d arg %p", cmd, arg); - - switch (cmd) { - case RFCOMMCREATEDEV: - return rfcomm_create_dev(sk, arg); - - case RFCOMMRELEASEDEV: - return rfcomm_release_dev(arg); - - case RFCOMMGETDEVLIST: - return rfcomm_get_dev_list(arg); - - case RFCOMMGETDEVINFO: - return rfcomm_get_dev_info(arg); - } - - return -EINVAL; -} - -/* ---- DLC callbacks ---- */ -static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb) -{ - struct rfcomm_dev *dev = dlc->owner; - struct tty_struct *tty; - - if (!dev) { - kfree_skb(skb); - return; - } - - tty = dev->tty; - if (!tty || !skb_queue_empty(&dev->pending)) { - skb_queue_tail(&dev->pending, skb); - return; - } - - BT_DBG("dlc %p tty %p len %d", dlc, tty, skb->len); - - tty_insert_flip_string(tty, skb->data, skb->len); - tty_flip_buffer_push(tty); - - kfree_skb(skb); -} - -static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err) -{ - struct rfcomm_dev *dev = dlc->owner; - if (!dev) - return; - - BT_DBG("dlc %p dev %p err %d", dlc, dev, err); - - dev->err = err; - wake_up_interruptible(&dev->wait); - - if (dlc->state == BT_CLOSED) { - if (!dev->tty) { - if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { - /* Drop DLC lock here to avoid deadlock - * 1. rfcomm_dev_get will take rfcomm_dev_lock - * but in rfcomm_dev_add there's lock order: - * rfcomm_dev_lock -> dlc lock - * 2. rfcomm_dev_put will deadlock if it's - * the last reference - */ - rfcomm_dlc_unlock(dlc); - if (rfcomm_dev_get(dev->id) == NULL) { - rfcomm_dlc_lock(dlc); - return; - } - - rfcomm_dev_del(dev); - rfcomm_dev_put(dev); - rfcomm_dlc_lock(dlc); - } - } else - tty_hangup(dev->tty); - } -} - -static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig) -{ - struct rfcomm_dev *dev = dlc->owner; - if (!dev) - return; - - BT_DBG("dlc %p dev %p v24_sig 0x%02x", dlc, dev, v24_sig); - - if ((dev->modem_status & TIOCM_CD) && !(v24_sig & RFCOMM_V24_DV)) { - if (dev->tty && !C_CLOCAL(dev->tty)) - tty_hangup(dev->tty); - } - - dev->modem_status = - ((v24_sig & RFCOMM_V24_RTC) ? (TIOCM_DSR | TIOCM_DTR) : 0) | - ((v24_sig & RFCOMM_V24_RTR) ? (TIOCM_RTS | TIOCM_CTS) : 0) | - ((v24_sig & RFCOMM_V24_IC) ? TIOCM_RI : 0) | - ((v24_sig & RFCOMM_V24_DV) ? TIOCM_CD : 0); -} - -/* ---- TTY functions ---- */ -static void rfcomm_tty_wakeup(struct work_struct *work) -{ - struct rfcomm_dev *dev = container_of(work, struct rfcomm_dev, - wakeup_task); - struct tty_struct *tty = dev->tty; - if (!tty) - return; - - BT_DBG("dev %p tty %p", dev, tty); - tty_wakeup(tty); -} - -static void rfcomm_tty_copy_pending(struct rfcomm_dev *dev) -{ - struct tty_struct *tty = dev->tty; - struct sk_buff *skb; - int inserted = 0; - - if (!tty) - return; - - BT_DBG("dev %p tty %p", dev, tty); - - rfcomm_dlc_lock(dev->dlc); - - while ((skb = skb_dequeue(&dev->pending))) { - inserted += tty_insert_flip_string(tty, skb->data, skb->len); - kfree_skb(skb); - } - - rfcomm_dlc_unlock(dev->dlc); - - if (inserted > 0) - tty_flip_buffer_push(tty); -} - -static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp) -{ - DECLARE_WAITQUEUE(wait, current); - struct rfcomm_dev *dev; - struct rfcomm_dlc *dlc; - int err, id; - - id = tty->index; - - BT_DBG("tty %p id %d", tty, id); - - /* We don't leak this refcount. For reasons which are not entirely - clear, the TTY layer will call our ->close() method even if the - open fails. We decrease the refcount there, and decreasing it - here too would cause breakage. */ - dev = rfcomm_dev_get(id); - if (!dev) - return -ENODEV; - - BT_DBG("dev %p dst %s channel %d opened %d", dev, batostr(&dev->dst), - dev->channel, atomic_read(&dev->opened)); - - if (atomic_inc_return(&dev->opened) > 1) - return 0; - - dlc = dev->dlc; - - /* Attach TTY and open DLC */ - - rfcomm_dlc_lock(dlc); - tty->driver_data = dev; - dev->tty = tty; - rfcomm_dlc_unlock(dlc); - set_bit(RFCOMM_TTY_ATTACHED, &dev->flags); - - err = rfcomm_dlc_open(dlc, &dev->src, &dev->dst, dev->channel); - if (err < 0) - return err; - - /* Wait for DLC to connect */ - add_wait_queue(&dev->wait, &wait); - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - - if (dlc->state == BT_CLOSED) { - err = -dev->err; - break; - } - - if (dlc->state == BT_CONNECTED) - break; - - if (signal_pending(current)) { - err = -EINTR; - break; - } - - tty_unlock(); - schedule(); - tty_lock(); - } - set_current_state(TASK_RUNNING); - remove_wait_queue(&dev->wait, &wait); - - if (err == 0) - device_move(dev->tty_dev, rfcomm_get_device(dev), - DPM_ORDER_DEV_AFTER_PARENT); - - rfcomm_tty_copy_pending(dev); - - rfcomm_dlc_unthrottle(dev->dlc); - - return err; -} - -static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - if (!dev) - return; - - BT_DBG("tty %p dev %p dlc %p opened %d", tty, dev, dev->dlc, - atomic_read(&dev->opened)); - - if (atomic_dec_and_test(&dev->opened)) { - if (dev->tty_dev->parent) - device_move(dev->tty_dev, NULL, DPM_ORDER_DEV_LAST); - - /* Close DLC and dettach TTY */ - rfcomm_dlc_close(dev->dlc, 0); - - clear_bit(RFCOMM_TTY_ATTACHED, &dev->flags); - cancel_work_sync(&dev->wakeup_task); - - rfcomm_dlc_lock(dev->dlc); - tty->driver_data = NULL; - dev->tty = NULL; - rfcomm_dlc_unlock(dev->dlc); - - if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) { - spin_lock(&rfcomm_dev_lock); - list_del_init(&dev->list); - spin_unlock(&rfcomm_dev_lock); - - rfcomm_dev_put(dev); - } - } - - rfcomm_dev_put(dev); -} - -static int rfcomm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - struct rfcomm_dlc *dlc = dev->dlc; - struct sk_buff *skb; - int err = 0, sent = 0, size; - - BT_DBG("tty %p count %d", tty, count); - - while (count) { - size = min_t(uint, count, dlc->mtu); - - skb = rfcomm_wmalloc(dev, size + RFCOMM_SKB_RESERVE, GFP_ATOMIC); - - if (!skb) - break; - - skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE); - - memcpy(skb_put(skb, size), buf + sent, size); - - err = rfcomm_dlc_send(dlc, skb); - if (err < 0) { - kfree_skb(skb); - break; - } - - sent += size; - count -= size; - } - - return sent ? sent : err; -} - -static int rfcomm_tty_write_room(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - int room; - - BT_DBG("tty %p", tty); - - if (!dev || !dev->dlc) - return 0; - - room = rfcomm_room(dev->dlc) - atomic_read(&dev->wmem_alloc); - if (room < 0) - room = 0; - - return room; -} - -static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) -{ - BT_DBG("tty %p cmd 0x%02x", tty, cmd); - - switch (cmd) { - case TCGETS: - BT_DBG("TCGETS is not supported"); - return -ENOIOCTLCMD; - - case TCSETS: - BT_DBG("TCSETS is not supported"); - return -ENOIOCTLCMD; - - case TIOCMIWAIT: - BT_DBG("TIOCMIWAIT"); - break; - - case TIOCGSERIAL: - BT_ERR("TIOCGSERIAL is not supported"); - return -ENOIOCTLCMD; - - case TIOCSSERIAL: - BT_ERR("TIOCSSERIAL is not supported"); - return -ENOIOCTLCMD; - - case TIOCSERGSTRUCT: - BT_ERR("TIOCSERGSTRUCT is not supported"); - return -ENOIOCTLCMD; - - case TIOCSERGETLSR: - BT_ERR("TIOCSERGETLSR is not supported"); - return -ENOIOCTLCMD; - - case TIOCSERCONFIG: - BT_ERR("TIOCSERCONFIG is not supported"); - return -ENOIOCTLCMD; - - default: - return -ENOIOCTLCMD; /* ioctls which we must ignore */ - - } - - return -ENOIOCTLCMD; -} - -static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old) -{ - struct ktermios *new = tty->termios; - int old_baud_rate = tty_termios_baud_rate(old); - int new_baud_rate = tty_termios_baud_rate(new); - - u8 baud, data_bits, stop_bits, parity, x_on, x_off; - u16 changes = 0; - - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p termios %p", tty, old); - - if (!dev || !dev->dlc || !dev->dlc->session) - return; - - /* Handle turning off CRTSCTS */ - if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS)) - BT_DBG("Turning off CRTSCTS unsupported"); - - /* Parity on/off and when on, odd/even */ - if (((old->c_cflag & PARENB) != (new->c_cflag & PARENB)) || - ((old->c_cflag & PARODD) != (new->c_cflag & PARODD))) { - changes |= RFCOMM_RPN_PM_PARITY; - BT_DBG("Parity change detected."); - } - - /* Mark and space parity are not supported! */ - if (new->c_cflag & PARENB) { - if (new->c_cflag & PARODD) { - BT_DBG("Parity is ODD"); - parity = RFCOMM_RPN_PARITY_ODD; - } else { - BT_DBG("Parity is EVEN"); - parity = RFCOMM_RPN_PARITY_EVEN; - } - } else { - BT_DBG("Parity is OFF"); - parity = RFCOMM_RPN_PARITY_NONE; - } - - /* Setting the x_on / x_off characters */ - if (old->c_cc[VSTOP] != new->c_cc[VSTOP]) { - BT_DBG("XOFF custom"); - x_on = new->c_cc[VSTOP]; - changes |= RFCOMM_RPN_PM_XON; - } else { - BT_DBG("XOFF default"); - x_on = RFCOMM_RPN_XON_CHAR; - } - - if (old->c_cc[VSTART] != new->c_cc[VSTART]) { - BT_DBG("XON custom"); - x_off = new->c_cc[VSTART]; - changes |= RFCOMM_RPN_PM_XOFF; - } else { - BT_DBG("XON default"); - x_off = RFCOMM_RPN_XOFF_CHAR; - } - - /* Handle setting of stop bits */ - if ((old->c_cflag & CSTOPB) != (new->c_cflag & CSTOPB)) - changes |= RFCOMM_RPN_PM_STOP; - - /* POSIX does not support 1.5 stop bits and RFCOMM does not - * support 2 stop bits. So a request for 2 stop bits gets - * translated to 1.5 stop bits */ - if (new->c_cflag & CSTOPB) - stop_bits = RFCOMM_RPN_STOP_15; - else - stop_bits = RFCOMM_RPN_STOP_1; - - /* Handle number of data bits [5-8] */ - if ((old->c_cflag & CSIZE) != (new->c_cflag & CSIZE)) - changes |= RFCOMM_RPN_PM_DATA; - - switch (new->c_cflag & CSIZE) { - case CS5: - data_bits = RFCOMM_RPN_DATA_5; - break; - case CS6: - data_bits = RFCOMM_RPN_DATA_6; - break; - case CS7: - data_bits = RFCOMM_RPN_DATA_7; - break; - case CS8: - data_bits = RFCOMM_RPN_DATA_8; - break; - default: - data_bits = RFCOMM_RPN_DATA_8; - break; - } - - /* Handle baudrate settings */ - if (old_baud_rate != new_baud_rate) - changes |= RFCOMM_RPN_PM_BITRATE; - - switch (new_baud_rate) { - case 2400: - baud = RFCOMM_RPN_BR_2400; - break; - case 4800: - baud = RFCOMM_RPN_BR_4800; - break; - case 7200: - baud = RFCOMM_RPN_BR_7200; - break; - case 9600: - baud = RFCOMM_RPN_BR_9600; - break; - case 19200: - baud = RFCOMM_RPN_BR_19200; - break; - case 38400: - baud = RFCOMM_RPN_BR_38400; - break; - case 57600: - baud = RFCOMM_RPN_BR_57600; - break; - case 115200: - baud = RFCOMM_RPN_BR_115200; - break; - case 230400: - baud = RFCOMM_RPN_BR_230400; - break; - default: - /* 9600 is standard accordinag to the RFCOMM specification */ - baud = RFCOMM_RPN_BR_9600; - break; - - } - - if (changes) - rfcomm_send_rpn(dev->dlc->session, 1, dev->dlc->dlci, baud, - data_bits, stop_bits, parity, - RFCOMM_RPN_FLOW_NONE, x_on, x_off, changes); -} - -static void rfcomm_tty_throttle(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p dev %p", tty, dev); - - rfcomm_dlc_throttle(dev->dlc); -} - -static void rfcomm_tty_unthrottle(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p dev %p", tty, dev); - - rfcomm_dlc_unthrottle(dev->dlc); -} - -static int rfcomm_tty_chars_in_buffer(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p dev %p", tty, dev); - - if (!dev || !dev->dlc) - return 0; - - if (!skb_queue_empty(&dev->dlc->tx_queue)) - return dev->dlc->mtu; - - return 0; -} - -static void rfcomm_tty_flush_buffer(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p dev %p", tty, dev); - - if (!dev || !dev->dlc) - return; - - skb_queue_purge(&dev->dlc->tx_queue); - tty_wakeup(tty); -} - -static void rfcomm_tty_send_xchar(struct tty_struct *tty, char ch) -{ - BT_DBG("tty %p ch %c", tty, ch); -} - -static void rfcomm_tty_wait_until_sent(struct tty_struct *tty, int timeout) -{ - BT_DBG("tty %p timeout %d", tty, timeout); -} - -static void rfcomm_tty_hangup(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p dev %p", tty, dev); - - if (!dev) - return; - - rfcomm_tty_flush_buffer(tty); - - if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { - if (rfcomm_dev_get(dev->id) == NULL) - return; - rfcomm_dev_del(dev); - rfcomm_dev_put(dev); - } -} - -static int rfcomm_tty_tiocmget(struct tty_struct *tty) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - - BT_DBG("tty %p dev %p", tty, dev); - - return dev->modem_status; -} - -static int rfcomm_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) -{ - struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; - struct rfcomm_dlc *dlc = dev->dlc; - u8 v24_sig; - - BT_DBG("tty %p dev %p set 0x%02x clear 0x%02x", tty, dev, set, clear); - - rfcomm_dlc_get_modem_status(dlc, &v24_sig); - - if (set & TIOCM_DSR || set & TIOCM_DTR) - v24_sig |= RFCOMM_V24_RTC; - if (set & TIOCM_RTS || set & TIOCM_CTS) - v24_sig |= RFCOMM_V24_RTR; - if (set & TIOCM_RI) - v24_sig |= RFCOMM_V24_IC; - if (set & TIOCM_CD) - v24_sig |= RFCOMM_V24_DV; - - if (clear & TIOCM_DSR || clear & TIOCM_DTR) - v24_sig &= ~RFCOMM_V24_RTC; - if (clear & TIOCM_RTS || clear & TIOCM_CTS) - v24_sig &= ~RFCOMM_V24_RTR; - if (clear & TIOCM_RI) - v24_sig &= ~RFCOMM_V24_IC; - if (clear & TIOCM_CD) - v24_sig &= ~RFCOMM_V24_DV; - - rfcomm_dlc_set_modem_status(dlc, v24_sig); - - return 0; -} - -/* ---- TTY structure ---- */ - -static const struct tty_operations rfcomm_ops = { - .open = rfcomm_tty_open, - .close = rfcomm_tty_close, - .write = rfcomm_tty_write, - .write_room = rfcomm_tty_write_room, - .chars_in_buffer = rfcomm_tty_chars_in_buffer, - .flush_buffer = rfcomm_tty_flush_buffer, - .ioctl = rfcomm_tty_ioctl, - .throttle = rfcomm_tty_throttle, - .unthrottle = rfcomm_tty_unthrottle, - .set_termios = rfcomm_tty_set_termios, - .send_xchar = rfcomm_tty_send_xchar, - .hangup = rfcomm_tty_hangup, - .wait_until_sent = rfcomm_tty_wait_until_sent, - .tiocmget = rfcomm_tty_tiocmget, - .tiocmset = rfcomm_tty_tiocmset, -}; - -int __init rfcomm_init_ttys(void) -{ - int error; - - rfcomm_tty_driver = alloc_tty_driver(RFCOMM_TTY_PORTS); - if (!rfcomm_tty_driver) - return -ENOMEM; - - rfcomm_tty_driver->driver_name = "rfcomm"; - rfcomm_tty_driver->name = "rfcomm"; - rfcomm_tty_driver->major = RFCOMM_TTY_MAJOR; - rfcomm_tty_driver->minor_start = RFCOMM_TTY_MINOR; - rfcomm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; - rfcomm_tty_driver->subtype = SERIAL_TYPE_NORMAL; - rfcomm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; - rfcomm_tty_driver->init_termios = tty_std_termios; - rfcomm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; - rfcomm_tty_driver->init_termios.c_lflag &= ~ICANON; - tty_set_operations(rfcomm_tty_driver, &rfcomm_ops); - - error = tty_register_driver(rfcomm_tty_driver); - if (error) { - BT_ERR("Can't register RFCOMM TTY driver"); - put_tty_driver(rfcomm_tty_driver); - return error; - } - - BT_INFO("RFCOMM TTY layer initialized"); - - return 0; -} - -void rfcomm_cleanup_ttys(void) -{ - tty_unregister_driver(rfcomm_tty_driver); - put_tty_driver(rfcomm_tty_driver); -} |