* $Id: core.c,v 1.42 2002/10/01 23:26:25 maxk Exp $
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/init.h>
#include <linux/wait.h>
+#include <linux/device.h>
#include <linux/net.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
+#include <linux/mutex.h>
+
#include <net/sock.h>
#include <asm/uaccess.h>
#include <asm/unaligned.h>
#include <net/bluetooth/l2cap.h>
#include <net/bluetooth/rfcomm.h>
-#define VERSION "1.5"
-
#ifndef CONFIG_BT_RFCOMM_DEBUG
#undef BT_DBG
#define BT_DBG(D...)
#endif
-#ifdef CONFIG_PROC_FS
-struct proc_dir_entry *proc_bt_rfcomm;
-#endif
+#define VERSION "1.8"
+
+static int disable_cfc = 0;
+static int channel_mtu = -1;
+static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU;
static struct task_struct *rfcomm_thread;
-static DECLARE_MUTEX(rfcomm_sem);
-#define rfcomm_lock() down(&rfcomm_sem);
-#define rfcomm_unlock() up(&rfcomm_sem);
+static DEFINE_MUTEX(rfcomm_mutex);
+#define rfcomm_lock() mutex_lock(&rfcomm_mutex)
+#define rfcomm_unlock() mutex_unlock(&rfcomm_mutex)
static unsigned long rfcomm_event;
/* ---- 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]])
struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio)
{
- struct rfcomm_dlc *d = kmalloc(sizeof(*d), prio);
+ struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio);
+
if (!d)
return NULL;
- memset(d, 0, sizeof(*d));
init_timer(&d->timer);
d->timer.function = rfcomm_dlc_timeout;
rfcomm_dlc_clear_state(d);
BT_DBG("%p", d);
+
return d;
}
/* ---- RFCOMM sessions ---- */
static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state)
{
- struct rfcomm_session *s = kmalloc(sizeof(*s), GFP_KERNEL);
+ struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL);
+
if (!s)
return NULL;
- memset(s, 0, sizeof(*s));
BT_DBG("session %p sock %p", s, sock);
s->sock = sock;
s->mtu = RFCOMM_DEFAULT_MTU;
- s->cfc = RFCOMM_CFC_UNKNOWN;
+ 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. */
/* Set L2CAP options */
sk = sock->sk;
lock_sock(sk);
- l2cap_pi(sk)->imtu = RFCOMM_MAX_L2CAP_MTU;
+ l2cap_pi(sk)->imtu = l2cap_mtu;
release_sock(sk);
s = rfcomm_session_add(sock, BT_BOUND);
pn->credits = 0;
}
- pn->mtu = htobs(d->mtu);
+ if (cr && channel_mtu >= 0)
+ pn->mtu = htobs(channel_mtu);
+ else
+ pn->mtu = htobs(d->mtu);
*ptr = __fcs(buf); ptr++;
static void rfcomm_dlc_accept(struct rfcomm_dlc *d)
{
+ struct sock *sk = d->session->sock->sk;
+
BT_DBG("dlc %p", d);
rfcomm_send_ua(d->session, d->dlci);
d->state_change(d, 0);
rfcomm_dlc_unlock(d);
+ if (d->link_mode & RFCOMM_LM_MASTER)
+ hci_conn_switch_role(l2cap_pi(sk)->conn->hcon, 0x00);
+
rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig);
}
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 || pn->flow_ctrl == 0xe0) {
- d->cfc = s->cfc = RFCOMM_CFC_ENABLED;
+ 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 = s->cfc = RFCOMM_CFC_DISABLED;
+ 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 = s->mtu = btohs(pn->mtu);
+ d->mtu = btohs(pn->mtu);
+
+ if (cr && d->mtu > s->mtu)
+ d->mtu = s->mtu;
return 0;
}
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)->omtu, l2cap_pi(nsock->sk)->imtu) - 5;
+
rfcomm_schedule(RFCOMM_SCHED_RX);
} else
sock_release(nsock);
/* Set L2CAP options */
sk = sock->sk;
lock_sock(sk);
- l2cap_pi(sk)->imtu = RFCOMM_MAX_L2CAP_MTU;
+ l2cap_pi(sk)->imtu = l2cap_mtu;
release_sock(sk);
/* Start listening on the socket */
.encrypt_cfm = rfcomm_encrypt_cfm
};
-/* ---- Proc fs support ---- */
-#ifdef CONFIG_PROC_FS
-static void *rfcomm_seq_start(struct seq_file *seq, loff_t *pos)
+static ssize_t rfcomm_dlc_sysfs_show(struct class *dev, char *buf)
{
struct rfcomm_session *s;
struct list_head *pp, *p;
- loff_t l = *pos;
+ char *str = buf;
rfcomm_lock();
list_for_each(p, &session_list) {
s = list_entry(p, struct rfcomm_session, list);
- list_for_each(pp, &s->dlcs)
- if (!l--) {
- seq->private = s;
- return pp;
- }
- }
- return NULL;
-}
+ list_for_each(pp, &s->dlcs) {
+ struct sock *sk = s->sock->sk;
+ struct rfcomm_dlc *d = list_entry(pp, struct rfcomm_dlc, list);
-static void *rfcomm_seq_next(struct seq_file *seq, void *e, loff_t *pos)
-{
- struct rfcomm_session *s = seq->private;
- struct list_head *pp, *p = e;
- (*pos)++;
-
- if (p->next != &s->dlcs)
- return p->next;
-
- list_for_each(p, &session_list) {
- s = list_entry(p, struct rfcomm_session, list);
- __list_for_each(pp, &s->dlcs) {
- seq->private = s;
- return pp;
+ str += sprintf(str, "%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);
}
}
- return NULL;
-}
-static void rfcomm_seq_stop(struct seq_file *seq, void *e)
-{
rfcomm_unlock();
-}
-
-static int rfcomm_seq_show(struct seq_file *seq, void *e)
-{
- struct rfcomm_session *s = seq->private;
- struct sock *sk = s->sock->sk;
- struct rfcomm_dlc *d = list_entry(e, struct rfcomm_dlc, list);
- seq_printf(seq, "%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);
- return 0;
+ return (str - buf);
}
-static struct seq_operations rfcomm_seq_ops = {
- .start = rfcomm_seq_start,
- .next = rfcomm_seq_next,
- .stop = rfcomm_seq_stop,
- .show = rfcomm_seq_show
-};
-
-static int rfcomm_seq_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &rfcomm_seq_ops);
-}
-
-static struct file_operations rfcomm_seq_fops = {
- .owner = THIS_MODULE,
- .open = rfcomm_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int __init rfcomm_proc_init(void)
-{
- struct proc_dir_entry *p;
-
- proc_bt_rfcomm = proc_mkdir("rfcomm", proc_bt);
- if (proc_bt_rfcomm) {
- proc_bt_rfcomm->owner = THIS_MODULE;
-
- p = create_proc_entry("dlc", S_IRUGO, proc_bt_rfcomm);
- if (p)
- p->proc_fops = &rfcomm_seq_fops;
- }
- return 0;
-}
-
-static void __exit rfcomm_proc_cleanup(void)
-{
- remove_proc_entry("dlc", proc_bt_rfcomm);
-
- remove_proc_entry("rfcomm", proc_bt);
-}
-
-#else /* CONFIG_PROC_FS */
-
-static int __init rfcomm_proc_init(void)
-{
- return 0;
-}
-
-static void __exit rfcomm_proc_cleanup(void)
-{
- return;
-}
-#endif /* CONFIG_PROC_FS */
+static CLASS_ATTR(rfcomm_dlc, S_IRUGO, rfcomm_dlc_sysfs_show, NULL);
/* ---- Initialization ---- */
static int __init rfcomm_init(void)
kernel_thread(rfcomm_run, NULL, CLONE_KERNEL);
- BT_INFO("RFCOMM ver %s", VERSION);
-
- rfcomm_proc_init();
+ class_create_file(bt_class, &class_attr_rfcomm_dlc);
rfcomm_init_sockets();
rfcomm_init_ttys();
#endif
+ BT_INFO("RFCOMM ver %s", VERSION);
+
return 0;
}
static void __exit rfcomm_exit(void)
{
+ class_remove_file(bt_class, &class_attr_rfcomm_dlc);
+
hci_unregister_cb(&rfcomm_cb);
/* Terminate working thread.
#endif
rfcomm_cleanup_sockets();
-
- rfcomm_proc_cleanup();
}
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_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION);
MODULE_VERSION(VERSION);
projects / linux-2.6-omap-h63xx.git / blobdiff