diff options
Diffstat (limited to 'net/bluetooth_tizen/rfcomm/core.c')
| -rw-r--r-- | net/bluetooth_tizen/rfcomm/core.c | 2245 |
1 files changed, 0 insertions, 2245 deletions
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"); |