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-rw-r--r--net/bluetooth/l2cap.c2329
1 files changed, 2329 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
new file mode 100644
index 000000000000..c12babcf0b3c
--- /dev/null
+++ b/net/bluetooth/l2cap.c
@@ -0,0 +1,2329 @@
+/*
+ BlueZ - Bluetooth protocol stack for Linux
+ Copyright (C) 2000-2001 Qualcomm Incorporated
+
+ Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation;
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+ ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth L2CAP core and sockets. */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.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/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/list.h>
+#include <net/sock.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#ifndef CONFIG_BT_L2CAP_DEBUG
+#undef BT_DBG
+#define BT_DBG(D...)
+#endif
+
+#define VERSION "2.7"
+
+static struct proto_ops l2cap_sock_ops;
+
+static struct bt_sock_list l2cap_sk_list = {
+ .lock = RW_LOCK_UNLOCKED
+};
+
+static int l2cap_conn_del(struct hci_conn *conn, int err);
+
+static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent);
+static void l2cap_chan_del(struct sock *sk, int err);
+
+static void __l2cap_sock_close(struct sock *sk, int reason);
+static void l2cap_sock_close(struct sock *sk);
+static void l2cap_sock_kill(struct sock *sk);
+
+static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
+ u8 code, u8 ident, u16 dlen, void *data);
+
+/* ---- L2CAP timers ---- */
+static void l2cap_sock_timeout(unsigned long arg)
+{
+ struct sock *sk = (struct sock *) arg;
+
+ BT_DBG("sock %p state %d", sk, sk->sk_state);
+
+ bh_lock_sock(sk);
+ __l2cap_sock_close(sk, ETIMEDOUT);
+ bh_unlock_sock(sk);
+
+ l2cap_sock_kill(sk);
+ sock_put(sk);
+}
+
+static void l2cap_sock_set_timer(struct sock *sk, long timeout)
+{
+ BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout);
+ sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
+}
+
+static void l2cap_sock_clear_timer(struct sock *sk)
+{
+ BT_DBG("sock %p state %d", sk, sk->sk_state);
+ sk_stop_timer(sk, &sk->sk_timer);
+}
+
+static void l2cap_sock_init_timer(struct sock *sk)
+{
+ init_timer(&sk->sk_timer);
+ sk->sk_timer.function = l2cap_sock_timeout;
+ sk->sk_timer.data = (unsigned long)sk;
+}
+
+/* ---- L2CAP connections ---- */
+static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
+{
+ struct l2cap_conn *conn;
+
+ if ((conn = hcon->l2cap_data))
+ return conn;
+
+ if (status)
+ return conn;
+
+ if (!(conn = kmalloc(sizeof(struct l2cap_conn), GFP_ATOMIC)))
+ return NULL;
+ memset(conn, 0, sizeof(struct l2cap_conn));
+
+ hcon->l2cap_data = conn;
+ conn->hcon = hcon;
+
+ conn->mtu = hcon->hdev->acl_mtu;
+ conn->src = &hcon->hdev->bdaddr;
+ conn->dst = &hcon->dst;
+
+ spin_lock_init(&conn->lock);
+ rwlock_init(&conn->chan_list.lock);
+
+ BT_DBG("hcon %p conn %p", hcon, conn);
+ return conn;
+}
+
+static int l2cap_conn_del(struct hci_conn *hcon, int err)
+{
+ struct l2cap_conn *conn;
+ struct sock *sk;
+
+ if (!(conn = hcon->l2cap_data))
+ return 0;
+
+ BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
+
+ if (conn->rx_skb)
+ kfree_skb(conn->rx_skb);
+
+ /* Kill channels */
+ while ((sk = conn->chan_list.head)) {
+ bh_lock_sock(sk);
+ l2cap_chan_del(sk, err);
+ bh_unlock_sock(sk);
+ l2cap_sock_kill(sk);
+ }
+
+ hcon->l2cap_data = NULL;
+ kfree(conn);
+ return 0;
+}
+
+static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
+{
+ struct l2cap_chan_list *l = &conn->chan_list;
+ write_lock(&l->lock);
+ __l2cap_chan_add(conn, sk, parent);
+ write_unlock(&l->lock);
+}
+
+static inline u8 l2cap_get_ident(struct l2cap_conn *conn)
+{
+ u8 id;
+
+ /* Get next available identificator.
+ * 1 - 128 are used by kernel.
+ * 129 - 199 are reserved.
+ * 200 - 254 are used by utilities like l2ping, etc.
+ */
+
+ spin_lock(&conn->lock);
+
+ if (++conn->tx_ident > 128)
+ conn->tx_ident = 1;
+
+ id = conn->tx_ident;
+
+ spin_unlock(&conn->lock);
+
+ return id;
+}
+
+static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data)
+{
+ struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data);
+
+ BT_DBG("code 0x%2.2x", code);
+
+ if (!skb)
+ return -ENOMEM;
+
+ return hci_send_acl(conn->hcon, skb, 0);
+}
+
+/* ---- Socket interface ---- */
+static struct sock *__l2cap_get_sock_by_addr(u16 psm, bdaddr_t *src)
+{
+ struct sock *sk;
+ struct hlist_node *node;
+ sk_for_each(sk, node, &l2cap_sk_list.head)
+ if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src))
+ goto found;
+ sk = NULL;
+found:
+ return sk;
+}
+
+/* Find socket with psm and source bdaddr.
+ * Returns closest match.
+ */
+static struct sock *__l2cap_get_sock_by_psm(int state, u16 psm, bdaddr_t *src)
+{
+ struct sock *sk = NULL, *sk1 = NULL;
+ struct hlist_node *node;
+
+ sk_for_each(sk, node, &l2cap_sk_list.head) {
+ if (state && sk->sk_state != state)
+ continue;
+
+ if (l2cap_pi(sk)->psm == psm) {
+ /* Exact match. */
+ if (!bacmp(&bt_sk(sk)->src, src))
+ break;
+
+ /* Closest match */
+ if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
+ sk1 = sk;
+ }
+ }
+ return node ? sk : sk1;
+}
+
+/* Find socket with given address (psm, src).
+ * Returns locked socket */
+static inline struct sock *l2cap_get_sock_by_psm(int state, u16 psm, bdaddr_t *src)
+{
+ struct sock *s;
+ read_lock(&l2cap_sk_list.lock);
+ s = __l2cap_get_sock_by_psm(state, psm, src);
+ if (s) bh_lock_sock(s);
+ read_unlock(&l2cap_sk_list.lock);
+ return s;
+}
+
+static void l2cap_sock_destruct(struct sock *sk)
+{
+ BT_DBG("sk %p", sk);
+
+ skb_queue_purge(&sk->sk_receive_queue);
+ skb_queue_purge(&sk->sk_write_queue);
+}
+
+static void l2cap_sock_cleanup_listen(struct sock *parent)
+{
+ struct sock *sk;
+
+ BT_DBG("parent %p", parent);
+
+ /* Close not yet accepted channels */
+ while ((sk = bt_accept_dequeue(parent, NULL)))
+ l2cap_sock_close(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 l2cap_sock_kill(struct sock *sk)
+{
+ if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
+ return;
+
+ BT_DBG("sk %p state %d", sk, sk->sk_state);
+
+ /* Kill poor orphan */
+ bt_sock_unlink(&l2cap_sk_list, sk);
+ sock_set_flag(sk, SOCK_DEAD);
+ sock_put(sk);
+}
+
+static void __l2cap_sock_close(struct sock *sk, int reason)
+{
+ BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
+
+ switch (sk->sk_state) {
+ case BT_LISTEN:
+ l2cap_sock_cleanup_listen(sk);
+ break;
+
+ case BT_CONNECTED:
+ case BT_CONFIG:
+ case BT_CONNECT2:
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct l2cap_disconn_req req;
+
+ sk->sk_state = BT_DISCONN;
+ l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
+
+ req.dcid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ req.scid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ l2cap_send_cmd(conn, l2cap_get_ident(conn),
+ L2CAP_DISCONN_REQ, sizeof(req), &req);
+ } else {
+ l2cap_chan_del(sk, reason);
+ }
+ break;
+
+ case BT_CONNECT:
+ case BT_DISCONN:
+ l2cap_chan_del(sk, reason);
+ break;
+
+ default:
+ sock_set_flag(sk, SOCK_ZAPPED);
+ break;
+ }
+}
+
+/* Must be called on unlocked socket. */
+static void l2cap_sock_close(struct sock *sk)
+{
+ l2cap_sock_clear_timer(sk);
+ lock_sock(sk);
+ __l2cap_sock_close(sk, ECONNRESET);
+ release_sock(sk);
+ l2cap_sock_kill(sk);
+}
+
+static void l2cap_sock_init(struct sock *sk, struct sock *parent)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+
+ BT_DBG("sk %p", sk);
+
+ if (parent) {
+ sk->sk_type = parent->sk_type;
+ pi->imtu = l2cap_pi(parent)->imtu;
+ pi->omtu = l2cap_pi(parent)->omtu;
+ pi->link_mode = l2cap_pi(parent)->link_mode;
+ } else {
+ pi->imtu = L2CAP_DEFAULT_MTU;
+ pi->omtu = 0;
+ pi->link_mode = 0;
+ }
+
+ /* Default config options */
+ pi->conf_mtu = L2CAP_DEFAULT_MTU;
+ pi->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+}
+
+static struct proto l2cap_proto = {
+ .name = "L2CAP",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct l2cap_pinfo)
+};
+
+static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, int prio)
+{
+ struct sock *sk;
+
+ sk = sk_alloc(PF_BLUETOOTH, prio, &l2cap_proto, 1);
+ if (!sk)
+ return NULL;
+
+ sock_init_data(sock, sk);
+ INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
+
+ sk->sk_destruct = l2cap_sock_destruct;
+ sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT;
+
+ sock_reset_flag(sk, SOCK_ZAPPED);
+
+ sk->sk_protocol = proto;
+ sk->sk_state = BT_OPEN;
+
+ l2cap_sock_init_timer(sk);
+
+ bt_sock_link(&l2cap_sk_list, sk);
+ return sk;
+}
+
+static int l2cap_sock_create(struct socket *sock, int protocol)
+{
+ struct sock *sk;
+
+ BT_DBG("sock %p", sock);
+
+ sock->state = SS_UNCONNECTED;
+
+ if (sock->type != SOCK_SEQPACKET &&
+ sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
+ return -ESOCKTNOSUPPORT;
+
+ if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW))
+ return -EPERM;
+
+ sock->ops = &l2cap_sock_ops;
+
+ sk = l2cap_sock_alloc(sock, protocol, GFP_KERNEL);
+ if (!sk)
+ return -ENOMEM;
+
+ l2cap_sock_init(sk, NULL);
+ return 0;
+}
+
+static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+{
+ struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
+ struct sock *sk = sock->sk;
+ int err = 0;
+
+ BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm);
+
+ if (!addr || addr->sa_family != AF_BLUETOOTH)
+ return -EINVAL;
+
+ lock_sock(sk);
+
+ if (sk->sk_state != BT_OPEN) {
+ err = -EBADFD;
+ goto done;
+ }
+
+ write_lock_bh(&l2cap_sk_list.lock);
+
+ if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) {
+ err = -EADDRINUSE;
+ } else {
+ /* Save source address */
+ bacpy(&bt_sk(sk)->src, &la->l2_bdaddr);
+ l2cap_pi(sk)->psm = la->l2_psm;
+ l2cap_pi(sk)->sport = la->l2_psm;
+ sk->sk_state = BT_BOUND;
+ }
+
+ write_unlock_bh(&l2cap_sk_list.lock);
+
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_do_connect(struct sock *sk)
+{
+ bdaddr_t *src = &bt_sk(sk)->src;
+ bdaddr_t *dst = &bt_sk(sk)->dst;
+ struct l2cap_conn *conn;
+ struct hci_conn *hcon;
+ struct hci_dev *hdev;
+ int err = 0;
+
+ BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm);
+
+ if (!(hdev = hci_get_route(dst, src)))
+ return -EHOSTUNREACH;
+
+ hci_dev_lock_bh(hdev);
+
+ err = -ENOMEM;
+
+ hcon = hci_connect(hdev, ACL_LINK, dst);
+ if (!hcon)
+ goto done;
+
+ conn = l2cap_conn_add(hcon, 0);
+ if (!conn) {
+ hci_conn_put(hcon);
+ goto done;
+ }
+
+ err = 0;
+
+ /* Update source addr of the socket */
+ bacpy(src, conn->src);
+
+ l2cap_chan_add(conn, sk, NULL);
+
+ sk->sk_state = BT_CONNECT;
+ l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
+
+ if (hcon->state == BT_CONNECTED) {
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ struct l2cap_conn_req req;
+ l2cap_pi(sk)->ident = l2cap_get_ident(conn);
+ req.scid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ req.psm = l2cap_pi(sk)->psm;
+ l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
+ L2CAP_CONN_REQ, sizeof(req), &req);
+ } else {
+ l2cap_sock_clear_timer(sk);
+ sk->sk_state = BT_CONNECTED;
+ }
+ }
+
+done:
+ hci_dev_unlock_bh(hdev);
+ hci_dev_put(hdev);
+ return err;
+}
+
+static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
+{
+ struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
+ struct sock *sk = sock->sk;
+ int err = 0;
+
+ lock_sock(sk);
+
+ BT_DBG("sk %p", sk);
+
+ if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ switch(sk->sk_state) {
+ case BT_CONNECT:
+ case BT_CONNECT2:
+ case BT_CONFIG:
+ /* Already connecting */
+ goto wait;
+
+ case BT_CONNECTED:
+ /* Already connected */
+ goto done;
+
+ case BT_OPEN:
+ case BT_BOUND:
+ /* Can connect */
+ break;
+
+ default:
+ err = -EBADFD;
+ goto done;
+ }
+
+ /* Set destination address and psm */
+ bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr);
+ l2cap_pi(sk)->psm = la->l2_psm;
+
+ if ((err = l2cap_do_connect(sk)))
+ goto done;
+
+wait:
+ err = bt_sock_wait_state(sk, BT_CONNECTED,
+ sock_sndtimeo(sk, flags & O_NONBLOCK));
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_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 || sock->type != SOCK_SEQPACKET) {
+ err = -EBADFD;
+ goto done;
+ }
+
+ if (!l2cap_pi(sk)->psm) {
+ bdaddr_t *src = &bt_sk(sk)->src;
+ u16 psm;
+
+ err = -EINVAL;
+
+ write_lock_bh(&l2cap_sk_list.lock);
+
+ for (psm = 0x1001; psm < 0x1100; psm += 2)
+ if (!__l2cap_get_sock_by_addr(psm, src)) {
+ l2cap_pi(sk)->psm = htobs(psm);
+ l2cap_pi(sk)->sport = htobs(psm);
+ err = 0;
+ break;
+ }
+
+ write_unlock_bh(&l2cap_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 l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ struct sock *sk = sock->sk, *nsk;
+ long timeo;
+ int err = 0;
+
+ lock_sock(sk);
+
+ if (sk->sk_state != BT_LISTEN) {
+ err = -EBADFD;
+ 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->sk_sleep, &wait);
+ while (!(nsk = bt_accept_dequeue(sk, newsock))) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (!timeo) {
+ err = -EAGAIN;
+ break;
+ }
+
+ release_sock(sk);
+ timeo = schedule_timeout(timeo);
+ lock_sock(sk);
+
+ if (sk->sk_state != BT_LISTEN) {
+ err = -EBADFD;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ err = sock_intr_errno(timeo);
+ break;
+ }
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(sk->sk_sleep, &wait);
+
+ if (err)
+ goto done;
+
+ newsock->state = SS_CONNECTED;
+
+ BT_DBG("new socket %p", nsk);
+
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
+{
+ struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
+ struct sock *sk = sock->sk;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ addr->sa_family = AF_BLUETOOTH;
+ *len = sizeof(struct sockaddr_l2);
+
+ if (peer)
+ bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst);
+ else
+ bacpy(&la->l2_bdaddr, &bt_sk(sk)->src);
+
+ la->l2_psm = l2cap_pi(sk)->psm;
+ return 0;
+}
+
+static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len)
+{
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct sk_buff *skb, **frag;
+ int err, hlen, count, sent=0;
+ struct l2cap_hdr *lh;
+
+ BT_DBG("sk %p len %d", sk, len);
+
+ /* First fragment (with L2CAP header) */
+ if (sk->sk_type == SOCK_DGRAM)
+ hlen = L2CAP_HDR_SIZE + 2;
+ else
+ hlen = L2CAP_HDR_SIZE;
+
+ count = min_t(unsigned int, (conn->mtu - hlen), len);
+
+ skb = bt_skb_send_alloc(sk, hlen + count,
+ msg->msg_flags & MSG_DONTWAIT, &err);
+ if (!skb)
+ return err;
+
+ /* Create L2CAP header */
+ lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+ lh->cid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ lh->len = __cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+
+ if (sk->sk_type == SOCK_DGRAM)
+ put_unaligned(l2cap_pi(sk)->psm, (u16 *) skb_put(skb, 2));
+
+ if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) {
+ err = -EFAULT;
+ goto fail;
+ }
+
+ sent += count;
+ len -= count;
+
+ /* Continuation fragments (no L2CAP header) */
+ frag = &skb_shinfo(skb)->frag_list;
+ while (len) {
+ count = min_t(unsigned int, conn->mtu, len);
+
+ *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err);
+ if (!*frag)
+ goto fail;
+
+ if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) {
+ err = -EFAULT;
+ goto fail;
+ }
+
+ sent += count;
+ len -= count;
+
+ frag = &(*frag)->next;
+ }
+
+ if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0)
+ goto fail;
+
+ return sent;
+
+fail:
+ kfree_skb(skb);
+ return err;
+}
+
+static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
+{
+ struct sock *sk = sock->sk;
+ int err = 0;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ if (sk->sk_err)
+ return sock_error(sk);
+
+ if (msg->msg_flags & MSG_OOB)
+ return -EOPNOTSUPP;
+
+ /* Check outgoing MTU */
+ if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu)
+ return -EINVAL;
+
+ lock_sock(sk);
+
+ if (sk->sk_state == BT_CONNECTED)
+ err = l2cap_do_send(sk, msg, len);
+ else
+ err = -ENOTCONN;
+
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct l2cap_options opts;
+ int err = 0, len;
+ u32 opt;
+
+ BT_DBG("sk %p", sk);
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case L2CAP_OPTIONS:
+ len = min_t(unsigned int, sizeof(opts), optlen);
+ if (copy_from_user((char *) &opts, optval, len)) {
+ err = -EFAULT;
+ break;
+ }
+ l2cap_pi(sk)->imtu = opts.imtu;
+ l2cap_pi(sk)->omtu = opts.omtu;
+ break;
+
+ case L2CAP_LM:
+ if (get_user(opt, (u32 __user *) optval)) {
+ err = -EFAULT;
+ break;
+ }
+
+ l2cap_pi(sk)->link_mode = opt;
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ struct l2cap_options opts;
+ struct l2cap_conninfo cinfo;
+ int len, err = 0;
+
+ BT_DBG("sk %p", sk);
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case L2CAP_OPTIONS:
+ opts.imtu = l2cap_pi(sk)->imtu;
+ opts.omtu = l2cap_pi(sk)->omtu;
+ opts.flush_to = l2cap_pi(sk)->flush_to;
+ opts.mode = 0x00;
+
+ len = min_t(unsigned int, len, sizeof(opts));
+ if (copy_to_user(optval, (char *) &opts, len))
+ err = -EFAULT;
+
+ break;
+
+ case L2CAP_LM:
+ if (put_user(l2cap_pi(sk)->link_mode, (u32 __user *) optval))
+ err = -EFAULT;
+ break;
+
+ case L2CAP_CONNINFO:
+ if (sk->sk_state != BT_CONNECTED) {
+ err = -ENOTCONN;
+ break;
+ }
+
+ cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle;
+ memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3);
+
+ len = min_t(unsigned int, len, sizeof(cinfo));
+ if (copy_to_user(optval, (char *) &cinfo, len))
+ err = -EFAULT;
+
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_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;
+ l2cap_sock_clear_timer(sk);
+ __l2cap_sock_close(sk, 0);
+
+ 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 l2cap_sock_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ int err;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ if (!sk)
+ return 0;
+
+ err = l2cap_sock_shutdown(sock, 2);
+
+ sock_orphan(sk);
+ l2cap_sock_kill(sk);
+ return err;
+}
+
+/* ---- L2CAP channels ---- */
+static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
+{
+ struct sock *s;
+ for (s = l->head; s; s = l2cap_pi(s)->next_c) {
+ if (l2cap_pi(s)->dcid == cid)
+ break;
+ }
+ return s;
+}
+
+static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
+{
+ struct sock *s;
+ for (s = l->head; s; s = l2cap_pi(s)->next_c) {
+ if (l2cap_pi(s)->scid == cid)
+ break;
+ }
+ return s;
+}
+
+/* Find channel with given SCID.
+ * Returns locked socket */
+static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
+{
+ struct sock *s;
+ read_lock(&l->lock);
+ s = __l2cap_get_chan_by_scid(l, cid);
+ if (s) bh_lock_sock(s);
+ read_unlock(&l->lock);
+ return s;
+}
+
+static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
+{
+ struct sock *s;
+ for (s = l->head; s; s = l2cap_pi(s)->next_c) {
+ if (l2cap_pi(s)->ident == ident)
+ break;
+ }
+ return s;
+}
+
+static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
+{
+ struct sock *s;
+ read_lock(&l->lock);
+ s = __l2cap_get_chan_by_ident(l, ident);
+ if (s) bh_lock_sock(s);
+ read_unlock(&l->lock);
+ return s;
+}
+
+static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)
+{
+ u16 cid = 0x0040;
+
+ for (; cid < 0xffff; cid++) {
+ if(!__l2cap_get_chan_by_scid(l, cid))
+ return cid;
+ }
+
+ return 0;
+}
+
+static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk)
+{
+ sock_hold(sk);
+
+ if (l->head)
+ l2cap_pi(l->head)->prev_c = sk;
+
+ l2cap_pi(sk)->next_c = l->head;
+ l2cap_pi(sk)->prev_c = NULL;
+ l->head = sk;
+}
+
+static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk)
+{
+ struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c;
+
+ write_lock(&l->lock);
+ if (sk == l->head)
+ l->head = next;
+
+ if (next)
+ l2cap_pi(next)->prev_c = prev;
+ if (prev)
+ l2cap_pi(prev)->next_c = next;
+ write_unlock(&l->lock);
+
+ __sock_put(sk);
+}
+
+static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
+{
+ struct l2cap_chan_list *l = &conn->chan_list;
+
+ BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid);
+
+ l2cap_pi(sk)->conn = conn;
+
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ /* Alloc CID for connection-oriented socket */
+ l2cap_pi(sk)->scid = l2cap_alloc_cid(l);
+ } else if (sk->sk_type == SOCK_DGRAM) {
+ /* Connectionless socket */
+ l2cap_pi(sk)->scid = 0x0002;
+ l2cap_pi(sk)->dcid = 0x0002;
+ l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
+ } else {
+ /* Raw socket can send/recv signalling messages only */
+ l2cap_pi(sk)->scid = 0x0001;
+ l2cap_pi(sk)->dcid = 0x0001;
+ l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
+ }
+
+ __l2cap_chan_link(l, sk);
+
+ if (parent)
+ bt_accept_enqueue(parent, sk);
+}
+
+/* Delete channel.
+ * Must be called on the locked socket. */
+static void l2cap_chan_del(struct sock *sk, int err)
+{
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct sock *parent = bt_sk(sk)->parent;
+
+ l2cap_sock_clear_timer(sk);
+
+ BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
+
+ if (conn) {
+ /* Unlink from channel list */
+ l2cap_chan_unlink(&conn->chan_list, sk);
+ l2cap_pi(sk)->conn = NULL;
+ hci_conn_put(conn->hcon);
+ }
+
+ sk->sk_state = BT_CLOSED;
+ sock_set_flag(sk, SOCK_ZAPPED);
+
+ if (err)
+ sk->sk_err = err;
+
+ if (parent) {
+ bt_accept_unlink(sk);
+ parent->sk_data_ready(parent, 0);
+ } else
+ sk->sk_state_change(sk);
+}
+
+static void l2cap_conn_ready(struct l2cap_conn *conn)
+{
+ struct l2cap_chan_list *l = &conn->chan_list;
+ struct sock *sk;
+
+ BT_DBG("conn %p", conn);
+
+ read_lock(&l->lock);
+
+ for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
+ bh_lock_sock(sk);
+
+ if (sk->sk_type != SOCK_SEQPACKET) {
+ l2cap_sock_clear_timer(sk);
+ sk->sk_state = BT_CONNECTED;
+ sk->sk_state_change(sk);
+ } else if (sk->sk_state == BT_CONNECT) {
+ struct l2cap_conn_req req;
+ l2cap_pi(sk)->ident = l2cap_get_ident(conn);
+ req.scid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ req.psm = l2cap_pi(sk)->psm;
+ l2cap_send_cmd(conn, l2cap_pi(sk)->ident, L2CAP_CONN_REQ, sizeof(req), &req);
+ }
+
+ bh_unlock_sock(sk);
+ }
+
+ read_unlock(&l->lock);
+}
+
+/* Notify sockets that we cannot guaranty reliability anymore */
+static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err)
+{
+ struct l2cap_chan_list *l = &conn->chan_list;
+ struct sock *sk;
+
+ BT_DBG("conn %p", conn);
+
+ read_lock(&l->lock);
+ for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
+ if (l2cap_pi(sk)->link_mode & L2CAP_LM_RELIABLE)
+ sk->sk_err = err;
+ }
+ read_unlock(&l->lock);
+}
+
+static void l2cap_chan_ready(struct sock *sk)
+{
+ struct sock *parent = bt_sk(sk)->parent;
+
+ BT_DBG("sk %p, parent %p", sk, parent);
+
+ l2cap_pi(sk)->conf_state = 0;
+ l2cap_sock_clear_timer(sk);
+
+ if (!parent) {
+ /* Outgoing channel.
+ * Wake up socket sleeping on connect.
+ */
+ sk->sk_state = BT_CONNECTED;
+ sk->sk_state_change(sk);
+ } else {
+ /* Incoming channel.
+ * Wake up socket sleeping on accept.
+ */
+ parent->sk_data_ready(parent, 0);
+ }
+}
+
+/* Copy frame to all raw sockets on that connection */
+static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ struct l2cap_chan_list *l = &conn->chan_list;
+ struct sk_buff *nskb;
+ struct sock * sk;
+
+ BT_DBG("conn %p", conn);
+
+ read_lock(&l->lock);
+ for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
+ if (sk->sk_type != SOCK_RAW)
+ continue;
+
+ /* Don't send frame to the socket it came from */
+ if (skb->sk == sk)
+ continue;
+
+ if (!(nskb = skb_clone(skb, GFP_ATOMIC)))
+ continue;
+
+ if (sock_queue_rcv_skb(sk, nskb))
+ kfree_skb(nskb);
+ }
+ read_unlock(&l->lock);
+}
+
+/* ---- L2CAP signalling commands ---- */
+static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
+ u8 code, u8 ident, u16 dlen, void *data)
+{
+ struct sk_buff *skb, **frag;
+ struct l2cap_cmd_hdr *cmd;
+ struct l2cap_hdr *lh;
+ int len, count;
+
+ BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen);
+
+ len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen;
+ count = min_t(unsigned int, conn->mtu, len);
+
+ skb = bt_skb_alloc(count, GFP_ATOMIC);
+ if (!skb)
+ return NULL;
+
+ lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+ lh->len = __cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen);
+ lh->cid = __cpu_to_le16(0x0001);
+
+ cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE);
+ cmd->code = code;
+ cmd->ident = ident;
+ cmd->len = __cpu_to_le16(dlen);
+
+ if (dlen) {
+ count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE;
+ memcpy(skb_put(skb, count), data, count);
+ data += count;
+ }
+
+ len -= skb->len;
+
+ /* Continuation fragments (no L2CAP header) */
+ frag = &skb_shinfo(skb)->frag_list;
+ while (len) {
+ count = min_t(unsigned int, conn->mtu, len);
+
+ *frag = bt_skb_alloc(count, GFP_ATOMIC);
+ if (!*frag)
+ goto fail;
+
+ memcpy(skb_put(*frag, count), data, count);
+
+ len -= count;
+ data += count;
+
+ frag = &(*frag)->next;
+ }
+
+ return skb;
+
+fail:
+ kfree_skb(skb);
+ return NULL;
+}
+
+static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val)
+{
+ struct l2cap_conf_opt *opt = *ptr;
+ int len;
+
+ len = L2CAP_CONF_OPT_SIZE + opt->len;
+ *ptr += len;
+
+ *type = opt->type;
+ *olen = opt->len;
+
+ switch (opt->len) {
+ case 1:
+ *val = *((u8 *) opt->val);
+ break;
+
+ case 2:
+ *val = __le16_to_cpu(*((u16 *)opt->val));
+ break;
+
+ case 4:
+ *val = __le32_to_cpu(*((u32 *)opt->val));
+ break;
+
+ default:
+ *val = (unsigned long) opt->val;
+ break;
+ }
+
+ BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val);
+ return len;
+}
+
+static inline void l2cap_parse_conf_req(struct sock *sk, void *data, int len)
+{
+ int type, hint, olen;
+ unsigned long val;
+ void *ptr = data;
+
+ BT_DBG("sk %p len %d", sk, len);
+
+ while (len >= L2CAP_CONF_OPT_SIZE) {
+ len -= l2cap_get_conf_opt(&ptr, &type, &olen, &val);
+
+ hint = type & 0x80;
+ type &= 0x7f;
+
+ switch (type) {
+ case L2CAP_CONF_MTU:
+ l2cap_pi(sk)->conf_mtu = val;
+ break;
+
+ case L2CAP_CONF_FLUSH_TO:
+ l2cap_pi(sk)->flush_to = val;
+ break;
+
+ case L2CAP_CONF_QOS:
+ break;
+
+ default:
+ if (hint)
+ break;
+
+ /* FIXME: Reject unknown option */
+ break;
+ }
+ }
+}
+
+static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
+{
+ struct l2cap_conf_opt *opt = *ptr;
+
+ BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val);
+
+ opt->type = type;
+ opt->len = len;
+
+ switch (len) {
+ case 1:
+ *((u8 *) opt->val) = val;
+ break;
+
+ case 2:
+ *((u16 *) opt->val) = __cpu_to_le16(val);
+ break;
+
+ case 4:
+ *((u32 *) opt->val) = __cpu_to_le32(val);
+ break;
+
+ default:
+ memcpy(opt->val, (void *) val, len);
+ break;
+ }
+
+ *ptr += L2CAP_CONF_OPT_SIZE + len;
+}
+
+static int l2cap_build_conf_req(struct sock *sk, void *data)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct l2cap_conf_req *req = data;
+ void *ptr = req->data;
+
+ BT_DBG("sk %p", sk);
+
+ if (pi->imtu != L2CAP_DEFAULT_MTU)
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
+
+ /* FIXME: Need actual value of the flush timeout */
+ //if (flush_to != L2CAP_DEFAULT_FLUSH_TO)
+ // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to);
+
+ req->dcid = __cpu_to_le16(pi->dcid);
+ req->flags = __cpu_to_le16(0);
+
+ return ptr - data;
+}
+
+static inline int l2cap_conf_output(struct sock *sk, void **ptr)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ int result = 0;
+
+ /* Configure output options and let the other side know
+ * which ones we don't like. */
+ if (pi->conf_mtu < pi->omtu) {
+ l2cap_add_conf_opt(ptr, L2CAP_CONF_MTU, 2, pi->omtu);
+ result = L2CAP_CONF_UNACCEPT;
+ } else {
+ pi->omtu = pi->conf_mtu;
+ }
+
+ BT_DBG("sk %p result %d", sk, result);
+ return result;
+}
+
+static int l2cap_build_conf_rsp(struct sock *sk, void *data, int *result)
+{
+ struct l2cap_conf_rsp *rsp = data;
+ void *ptr = rsp->data;
+ u16 flags = 0;
+
+ BT_DBG("sk %p complete %d", sk, result ? 1 : 0);
+
+ if (result)
+ *result = l2cap_conf_output(sk, &ptr);
+ else
+ flags = 0x0001;
+
+ rsp->scid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ rsp->result = __cpu_to_le16(result ? *result : 0);
+ rsp->flags = __cpu_to_le16(flags);
+
+ return ptr - data;
+}
+
+static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_chan_list *list = &conn->chan_list;
+ struct l2cap_conn_req *req = (struct l2cap_conn_req *) data;
+ struct l2cap_conn_rsp rsp;
+ struct sock *sk, *parent;
+ int result = 0, status = 0;
+
+ u16 dcid = 0, scid = __le16_to_cpu(req->scid);
+ u16 psm = req->psm;
+
+ BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid);
+
+ /* Check if we have socket listening on psm */
+ parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src);
+ if (!parent) {
+ result = L2CAP_CR_BAD_PSM;
+ goto sendresp;
+ }
+
+ result = L2CAP_CR_NO_MEM;
+
+ /* Check for backlog size */
+ if (sk_acceptq_is_full(parent)) {
+ BT_DBG("backlog full %d", parent->sk_ack_backlog);
+ goto response;
+ }
+
+ sk = l2cap_sock_alloc(NULL, BTPROTO_L2CAP, GFP_ATOMIC);
+ if (!sk)
+ goto response;
+
+ write_lock(&list->lock);
+
+ /* Check if we already have channel with that dcid */
+ if (__l2cap_get_chan_by_dcid(list, scid)) {
+ write_unlock(&list->lock);
+ sock_set_flag(sk, SOCK_ZAPPED);
+ l2cap_sock_kill(sk);
+ goto response;
+ }
+
+ hci_conn_hold(conn->hcon);
+
+ l2cap_sock_init(sk, parent);
+ bacpy(&bt_sk(sk)->src, conn->src);
+ bacpy(&bt_sk(sk)->dst, conn->dst);
+ l2cap_pi(sk)->psm = psm;
+ l2cap_pi(sk)->dcid = scid;
+
+ __l2cap_chan_add(conn, sk, parent);
+ dcid = l2cap_pi(sk)->scid;
+
+ l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
+
+ /* Service level security */
+ result = L2CAP_CR_PEND;
+ status = L2CAP_CS_AUTHEN_PEND;
+ sk->sk_state = BT_CONNECT2;
+ l2cap_pi(sk)->ident = cmd->ident;
+
+ if ((l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) ||
+ (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) {
+ if (!hci_conn_encrypt(conn->hcon))
+ goto done;
+ } else if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH) {
+ if (!hci_conn_auth(conn->hcon))
+ goto done;
+ }
+
+ sk->sk_state = BT_CONFIG;
+ result = status = 0;
+
+done:
+ write_unlock(&list->lock);
+
+response:
+ bh_unlock_sock(parent);
+
+sendresp:
+ rsp.scid = __cpu_to_le16(scid);
+ rsp.dcid = __cpu_to_le16(dcid);
+ rsp.result = __cpu_to_le16(result);
+ rsp.status = __cpu_to_le16(status);
+ l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+ return 0;
+}
+
+static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data;
+ u16 scid, dcid, result, status;
+ struct sock *sk;
+ u8 req[128];
+
+ scid = __le16_to_cpu(rsp->scid);
+ dcid = __le16_to_cpu(rsp->dcid);
+ result = __le16_to_cpu(rsp->result);
+ status = __le16_to_cpu(rsp->status);
+
+ BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status);
+
+ if (scid) {
+ if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid)))
+ return 0;
+ } else {
+ if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident)))
+ return 0;
+ }
+
+ switch (result) {
+ case L2CAP_CR_SUCCESS:
+ sk->sk_state = BT_CONFIG;
+ l2cap_pi(sk)->ident = 0;
+ l2cap_pi(sk)->dcid = dcid;
+ l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
+
+ l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+ l2cap_build_conf_req(sk, req), req);
+ break;
+
+ case L2CAP_CR_PEND:
+ break;
+
+ default:
+ l2cap_chan_del(sk, ECONNREFUSED);
+ break;
+ }
+
+ bh_unlock_sock(sk);
+ return 0;
+}
+
+static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_conf_req *req = (struct l2cap_conf_req *) data;
+ u16 dcid, flags;
+ u8 rsp[64];
+ struct sock *sk;
+ int result;
+
+ dcid = __le16_to_cpu(req->dcid);
+ flags = __le16_to_cpu(req->flags);
+
+ BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags);
+
+ if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid)))
+ return -ENOENT;
+
+ l2cap_parse_conf_req(sk, req->data, cmd->len - sizeof(*req));
+
+ if (flags & 0x0001) {
+ /* Incomplete config. Send empty response. */
+ l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
+ l2cap_build_conf_rsp(sk, rsp, NULL), rsp);
+ goto unlock;
+ }
+
+ /* Complete config. */
+ l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
+ l2cap_build_conf_rsp(sk, rsp, &result), rsp);
+
+ if (result)
+ goto unlock;
+
+ /* Output config done */
+ l2cap_pi(sk)->conf_state |= L2CAP_CONF_OUTPUT_DONE;
+
+ if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
+ sk->sk_state = BT_CONNECTED;
+ l2cap_chan_ready(sk);
+ } else if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) {
+ u8 req[64];
+ l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+ l2cap_build_conf_req(sk, req), req);
+ }
+
+unlock:
+ bh_unlock_sock(sk);
+ return 0;
+}
+
+static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data;
+ u16 scid, flags, result;
+ struct sock *sk;
+
+ scid = __le16_to_cpu(rsp->scid);
+ flags = __le16_to_cpu(rsp->flags);
+ result = __le16_to_cpu(rsp->result);
+
+ BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result);
+
+ if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid)))
+ return 0;
+
+ switch (result) {
+ case L2CAP_CONF_SUCCESS:
+ break;
+
+ case L2CAP_CONF_UNACCEPT:
+ if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) {
+ char req[128];
+ /* It does not make sense to adjust L2CAP parameters
+ * that are currently defined in the spec. We simply
+ * resend config request that we sent earlier. It is
+ * stupid, but it helps qualification testing which
+ * expects at least some response from us. */
+ l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+ l2cap_build_conf_req(sk, req), req);
+ goto done;
+ }
+
+ default:
+ sk->sk_state = BT_DISCONN;
+ sk->sk_err = ECONNRESET;
+ l2cap_sock_set_timer(sk, HZ * 5);
+ {
+ struct l2cap_disconn_req req;
+ req.dcid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ req.scid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ l2cap_send_cmd(conn, l2cap_get_ident(conn),
+ L2CAP_DISCONN_REQ, sizeof(req), &req);
+ }
+ goto done;
+ }
+
+ if (flags & 0x01)
+ goto done;
+
+ /* Input config done */
+ l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE;
+
+ if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) {
+ sk->sk_state = BT_CONNECTED;
+ l2cap_chan_ready(sk);
+ }
+
+done:
+ bh_unlock_sock(sk);
+ return 0;
+}
+
+static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data;
+ struct l2cap_disconn_rsp rsp;
+ u16 dcid, scid;
+ struct sock *sk;
+
+ scid = __le16_to_cpu(req->scid);
+ dcid = __le16_to_cpu(req->dcid);
+
+ BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid);
+
+ if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid)))
+ return 0;
+
+ rsp.dcid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ rsp.scid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp);
+
+ sk->sk_shutdown = SHUTDOWN_MASK;
+
+ l2cap_chan_del(sk, ECONNRESET);
+ bh_unlock_sock(sk);
+
+ l2cap_sock_kill(sk);
+ return 0;
+}
+
+static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data;
+ u16 dcid, scid;
+ struct sock *sk;
+
+ scid = __le16_to_cpu(rsp->scid);
+ dcid = __le16_to_cpu(rsp->dcid);
+
+ BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid);
+
+ if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid)))
+ return 0;
+
+ l2cap_chan_del(sk, 0);
+ bh_unlock_sock(sk);
+
+ l2cap_sock_kill(sk);
+ return 0;
+}
+
+static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_info_req *req = (struct l2cap_info_req *) data;
+ struct l2cap_info_rsp rsp;
+ u16 type;
+
+ type = __le16_to_cpu(req->type);
+
+ BT_DBG("type 0x%4.4x", type);
+
+ rsp.type = __cpu_to_le16(type);
+ rsp.result = __cpu_to_le16(L2CAP_IR_NOTSUPP);
+ l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(rsp), &rsp);
+
+ return 0;
+}
+
+static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data;
+ u16 type, result;
+
+ type = __le16_to_cpu(rsp->type);
+ result = __le16_to_cpu(rsp->result);
+
+ BT_DBG("type 0x%4.4x result 0x%2.2x", type, result);
+
+ return 0;
+}
+
+static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ u8 *data = skb->data;
+ int len = skb->len;
+ struct l2cap_cmd_hdr cmd;
+ int err = 0;
+
+ l2cap_raw_recv(conn, skb);
+
+ while (len >= L2CAP_CMD_HDR_SIZE) {
+ memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE);
+ data += L2CAP_CMD_HDR_SIZE;
+ len -= L2CAP_CMD_HDR_SIZE;
+
+ cmd.len = __le16_to_cpu(cmd.len);
+
+ BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd.len, cmd.ident);
+
+ if (cmd.len > len || !cmd.ident) {
+ BT_DBG("corrupted command");
+ break;
+ }
+
+ switch (cmd.code) {
+ case L2CAP_COMMAND_REJ:
+ /* FIXME: We should process this */
+ break;
+
+ case L2CAP_CONN_REQ:
+ err = l2cap_connect_req(conn, &cmd, data);
+ break;
+
+ case L2CAP_CONN_RSP:
+ err = l2cap_connect_rsp(conn, &cmd, data);
+ break;
+
+ case L2CAP_CONF_REQ:
+ err = l2cap_config_req(conn, &cmd, data);
+ break;
+
+ case L2CAP_CONF_RSP:
+ err = l2cap_config_rsp(conn, &cmd, data);
+ break;
+
+ case L2CAP_DISCONN_REQ:
+ err = l2cap_disconnect_req(conn, &cmd, data);
+ break;
+
+ case L2CAP_DISCONN_RSP:
+ err = l2cap_disconnect_rsp(conn, &cmd, data);
+ break;
+
+ case L2CAP_ECHO_REQ:
+ l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd.len, data);
+ break;
+
+ case L2CAP_ECHO_RSP:
+ break;
+
+ case L2CAP_INFO_REQ:
+ err = l2cap_information_req(conn, &cmd, data);
+ break;
+
+ case L2CAP_INFO_RSP:
+ err = l2cap_information_rsp(conn, &cmd, data);
+ break;
+
+ default:
+ BT_ERR("Unknown signaling command 0x%2.2x", cmd.code);
+ err = -EINVAL;
+ break;
+ }
+
+ if (err) {
+ struct l2cap_cmd_rej rej;
+ BT_DBG("error %d", err);
+
+ /* FIXME: Map err to a valid reason */
+ rej.reason = __cpu_to_le16(0);
+ l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej);
+ }
+
+ data += cmd.len;
+ len -= cmd.len;
+ }
+
+ kfree_skb(skb);
+}
+
+static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb)
+{
+ struct sock *sk;
+
+ sk = l2cap_get_chan_by_scid(&conn->chan_list, cid);
+ if (!sk) {
+ BT_DBG("unknown cid 0x%4.4x", cid);
+ goto drop;
+ }
+
+ BT_DBG("sk %p, len %d", sk, skb->len);
+
+ if (sk->sk_state != BT_CONNECTED)
+ goto drop;
+
+ if (l2cap_pi(sk)->imtu < skb->len)
+ goto drop;
+
+ /* If socket recv buffers overflows we drop data here
+ * which is *bad* because L2CAP has to be reliable.
+ * But we don't have any other choice. L2CAP doesn't
+ * provide flow control mechanism. */
+
+ if (!sock_queue_rcv_skb(sk, skb))
+ goto done;
+
+drop:
+ kfree_skb(skb);
+
+done:
+ if (sk) bh_unlock_sock(sk);
+ return 0;
+}
+
+static inline int l2cap_conless_channel(struct l2cap_conn *conn, u16 psm, struct sk_buff *skb)
+{
+ struct sock *sk;
+
+ sk = l2cap_get_sock_by_psm(0, psm, conn->src);
+ if (!sk)
+ goto drop;
+
+ BT_DBG("sk %p, len %d", sk, skb->len);
+
+ if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
+ goto drop;
+
+ if (l2cap_pi(sk)->imtu < skb->len)
+ goto drop;
+
+ if (!sock_queue_rcv_skb(sk, skb))
+ goto done;
+
+drop:
+ kfree_skb(skb);
+
+done:
+ if (sk) bh_unlock_sock(sk);
+ return 0;
+}
+
+static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ struct l2cap_hdr *lh = (void *) skb->data;
+ u16 cid, psm, len;
+
+ skb_pull(skb, L2CAP_HDR_SIZE);
+ cid = __le16_to_cpu(lh->cid);
+ len = __le16_to_cpu(lh->len);
+
+ BT_DBG("len %d, cid 0x%4.4x", len, cid);
+
+ switch (cid) {
+ case 0x0001:
+ l2cap_sig_channel(conn, skb);
+ break;
+
+ case 0x0002:
+ psm = get_unaligned((u16 *) skb->data);
+ skb_pull(skb, 2);
+ l2cap_conless_channel(conn, psm, skb);
+ break;
+
+ default:
+ l2cap_data_channel(conn, cid, skb);
+ break;
+ }
+}
+
+/* ---- L2CAP interface with lower layer (HCI) ---- */
+
+static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
+{
+ int exact = 0, lm1 = 0, lm2 = 0;
+ register struct sock *sk;
+ struct hlist_node *node;
+
+ if (type != ACL_LINK)
+ return 0;
+
+ BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
+
+ /* Find listening sockets and check their link_mode */
+ read_lock(&l2cap_sk_list.lock);
+ sk_for_each(sk, node, &l2cap_sk_list.head) {
+ if (sk->sk_state != BT_LISTEN)
+ continue;
+
+ if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) {
+ lm1 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode);
+ exact++;
+ } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
+ lm2 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode);
+ }
+ read_unlock(&l2cap_sk_list.lock);
+
+ return exact ? lm1 : lm2;
+}
+
+static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
+{
+ BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
+
+ if (hcon->type != ACL_LINK)
+ return 0;
+
+ if (!status) {
+ struct l2cap_conn *conn;
+
+ conn = l2cap_conn_add(hcon, status);
+ if (conn)
+ l2cap_conn_ready(conn);
+ } else
+ l2cap_conn_del(hcon, bt_err(status));
+
+ return 0;
+}
+
+static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason)
+{
+ BT_DBG("hcon %p reason %d", hcon, reason);
+
+ if (hcon->type != ACL_LINK)
+ return 0;
+
+ l2cap_conn_del(hcon, bt_err(reason));
+ return 0;
+}
+
+static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status)
+{
+ struct l2cap_chan_list *l;
+ struct l2cap_conn *conn;
+ struct l2cap_conn_rsp rsp;
+ struct sock *sk;
+ int result;
+
+ if (!(conn = hcon->l2cap_data))
+ return 0;
+ l = &conn->chan_list;
+
+ BT_DBG("conn %p", conn);
+
+ read_lock(&l->lock);
+
+ for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
+ bh_lock_sock(sk);
+
+ if (sk->sk_state != BT_CONNECT2 ||
+ (l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) ||
+ (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) {
+ bh_unlock_sock(sk);
+ continue;
+ }
+
+ if (!status) {
+ sk->sk_state = BT_CONFIG;
+ result = 0;
+ } else {
+ sk->sk_state = BT_DISCONN;
+ l2cap_sock_set_timer(sk, HZ/10);
+ result = L2CAP_CR_SEC_BLOCK;
+ }
+
+ rsp.scid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ rsp.dcid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ rsp.result = __cpu_to_le16(result);
+ rsp.status = __cpu_to_le16(0);
+ l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
+ L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+
+ bh_unlock_sock(sk);
+ }
+
+ read_unlock(&l->lock);
+ return 0;
+}
+
+static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status)
+{
+ struct l2cap_chan_list *l;
+ struct l2cap_conn *conn;
+ struct l2cap_conn_rsp rsp;
+ struct sock *sk;
+ int result;
+
+ if (!(conn = hcon->l2cap_data))
+ return 0;
+ l = &conn->chan_list;
+
+ BT_DBG("conn %p", conn);
+
+ read_lock(&l->lock);
+
+ for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
+ bh_lock_sock(sk);
+
+ if (sk->sk_state != BT_CONNECT2) {
+ bh_unlock_sock(sk);
+ continue;
+ }
+
+ if (!status) {
+ sk->sk_state = BT_CONFIG;
+ result = 0;
+ } else {
+ sk->sk_state = BT_DISCONN;
+ l2cap_sock_set_timer(sk, HZ/10);
+ result = L2CAP_CR_SEC_BLOCK;
+ }
+
+ rsp.scid = __cpu_to_le16(l2cap_pi(sk)->dcid);
+ rsp.dcid = __cpu_to_le16(l2cap_pi(sk)->scid);
+ rsp.result = __cpu_to_le16(result);
+ rsp.status = __cpu_to_le16(0);
+ l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
+ L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+
+ if (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)
+ hci_conn_change_link_key(hcon);
+
+ bh_unlock_sock(sk);
+ }
+
+ read_unlock(&l->lock);
+ return 0;
+}
+
+static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
+{
+ struct l2cap_conn *conn = hcon->l2cap_data;
+
+ if (!conn && !(conn = l2cap_conn_add(hcon, 0)))
+ goto drop;
+
+ BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags);
+
+ if (flags & ACL_START) {
+ struct l2cap_hdr *hdr;
+ int len;
+
+ if (conn->rx_len) {
+ BT_ERR("Unexpected start frame (len %d)", skb->len);
+ kfree_skb(conn->rx_skb);
+ conn->rx_skb = NULL;
+ conn->rx_len = 0;
+ l2cap_conn_unreliable(conn, ECOMM);
+ }
+
+ if (skb->len < 2) {
+ BT_ERR("Frame is too short (len %d)", skb->len);
+ l2cap_conn_unreliable(conn, ECOMM);
+ goto drop;
+ }
+
+ hdr = (struct l2cap_hdr *) skb->data;
+ len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE;
+
+ if (len == skb->len) {
+ /* Complete frame received */
+ l2cap_recv_frame(conn, skb);
+ return 0;
+ }
+
+ BT_DBG("Start: total len %d, frag len %d", len, skb->len);
+
+ if (skb->len > len) {
+ BT_ERR("Frame is too long (len %d, expected len %d)",
+ skb->len, len);
+ l2cap_conn_unreliable(conn, ECOMM);
+ goto drop;
+ }
+
+ /* Allocate skb for the complete frame (with header) */
+ if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC)))
+ goto drop;
+
+ memcpy(skb_put(conn->rx_skb, skb->len), skb->data, skb->len);
+ conn->rx_len = len - skb->len;
+ } else {
+ BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len);
+
+ if (!conn->rx_len) {
+ BT_ERR("Unexpected continuation frame (len %d)", skb->len);
+ l2cap_conn_unreliable(conn, ECOMM);
+ goto drop;
+ }
+
+ if (skb->len > conn->rx_len) {
+ BT_ERR("Fragment is too long (len %d, expected %d)",
+ skb->len, conn->rx_len);
+ kfree_skb(conn->rx_skb);
+ conn->rx_skb = NULL;
+ conn->rx_len = 0;
+ l2cap_conn_unreliable(conn, ECOMM);
+ goto drop;
+ }
+
+ memcpy(skb_put(conn->rx_skb, skb->len), skb->data, skb->len);
+ conn->rx_len -= skb->len;
+
+ if (!conn->rx_len) {
+ /* Complete frame received */
+ l2cap_recv_frame(conn, conn->rx_skb);
+ conn->rx_skb = NULL;
+ }
+ }
+
+drop:
+ kfree_skb(skb);
+ return 0;
+}
+
+/* ---- Proc fs support ---- */
+#ifdef CONFIG_PROC_FS
+static void *l2cap_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct sock *sk;
+ struct hlist_node *node;
+ loff_t l = *pos;
+
+ read_lock_bh(&l2cap_sk_list.lock);
+
+ sk_for_each(sk, node, &l2cap_sk_list.head)
+ if (!l--)
+ goto found;
+ sk = NULL;
+found:
+ return sk;
+}
+
+static void *l2cap_seq_next(struct seq_file *seq, void *e, loff_t *pos)
+{
+ (*pos)++;
+ return sk_next(e);
+}
+
+static void l2cap_seq_stop(struct seq_file *seq, void *e)
+{
+ read_unlock_bh(&l2cap_sk_list.lock);
+}
+
+static int l2cap_seq_show(struct seq_file *seq, void *e)
+{
+ struct sock *sk = e;
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+
+ seq_printf(seq, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n",
+ batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
+ sk->sk_state, pi->psm, pi->scid, pi->dcid, pi->imtu,
+ pi->omtu, pi->link_mode);
+ return 0;
+}
+
+static struct seq_operations l2cap_seq_ops = {
+ .start = l2cap_seq_start,
+ .next = l2cap_seq_next,
+ .stop = l2cap_seq_stop,
+ .show = l2cap_seq_show
+};
+
+static int l2cap_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &l2cap_seq_ops);
+}
+
+static struct file_operations l2cap_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = l2cap_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int __init l2cap_proc_init(void)
+{
+ struct proc_dir_entry *p = create_proc_entry("l2cap", S_IRUGO, proc_bt);
+ if (!p)
+ return -ENOMEM;
+ p->owner = THIS_MODULE;
+ p->proc_fops = &l2cap_seq_fops;
+ return 0;
+}
+
+static void __exit l2cap_proc_cleanup(void)
+{
+ remove_proc_entry("l2cap", proc_bt);
+}
+
+#else /* CONFIG_PROC_FS */
+
+static int __init l2cap_proc_init(void)
+{
+ return 0;
+}
+
+static void __exit l2cap_proc_cleanup(void)
+{
+ return;
+}
+#endif /* CONFIG_PROC_FS */
+
+static struct proto_ops l2cap_sock_ops = {
+ .family = PF_BLUETOOTH,
+ .owner = THIS_MODULE,
+ .release = l2cap_sock_release,
+ .bind = l2cap_sock_bind,
+ .connect = l2cap_sock_connect,
+ .listen = l2cap_sock_listen,
+ .accept = l2cap_sock_accept,
+ .getname = l2cap_sock_getname,
+ .sendmsg = l2cap_sock_sendmsg,
+ .recvmsg = bt_sock_recvmsg,
+ .poll = bt_sock_poll,
+ .mmap = sock_no_mmap,
+ .socketpair = sock_no_socketpair,
+ .ioctl = sock_no_ioctl,
+ .shutdown = l2cap_sock_shutdown,
+ .setsockopt = l2cap_sock_setsockopt,
+ .getsockopt = l2cap_sock_getsockopt
+};
+
+static struct net_proto_family l2cap_sock_family_ops = {
+ .family = PF_BLUETOOTH,
+ .owner = THIS_MODULE,
+ .create = l2cap_sock_create,
+};
+
+static struct hci_proto l2cap_hci_proto = {
+ .name = "L2CAP",
+ .id = HCI_PROTO_L2CAP,
+ .connect_ind = l2cap_connect_ind,
+ .connect_cfm = l2cap_connect_cfm,
+ .disconn_ind = l2cap_disconn_ind,
+ .auth_cfm = l2cap_auth_cfm,
+ .encrypt_cfm = l2cap_encrypt_cfm,
+ .recv_acldata = l2cap_recv_acldata
+};
+
+static int __init l2cap_init(void)
+{
+ int err;
+
+ err = proto_register(&l2cap_proto, 0);
+ if (err < 0)
+ return err;
+
+ err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
+ if (err < 0) {
+ BT_ERR("L2CAP socket registration failed");
+ goto error;
+ }
+
+ err = hci_register_proto(&l2cap_hci_proto);
+ if (err < 0) {
+ BT_ERR("L2CAP protocol registration failed");
+ bt_sock_unregister(BTPROTO_L2CAP);
+ goto error;
+ }
+
+ l2cap_proc_init();
+
+ BT_INFO("L2CAP ver %s", VERSION);
+ BT_INFO("L2CAP socket layer initialized");
+
+ return 0;
+
+error:
+ proto_unregister(&l2cap_proto);
+ return err;
+}
+
+static void __exit l2cap_exit(void)
+{
+ l2cap_proc_cleanup();
+
+ if (bt_sock_unregister(BTPROTO_L2CAP) < 0)
+ BT_ERR("L2CAP socket unregistration failed");
+
+ if (hci_unregister_proto(&l2cap_hci_proto) < 0)
+ BT_ERR("L2CAP protocol unregistration failed");
+
+ proto_unregister(&l2cap_proto);
+}
+
+void l2cap_load(void)
+{
+ /* Dummy function to trigger automatic L2CAP module loading by
+ * other modules that use L2CAP sockets but don't use any other
+ * symbols from it. */
+ return;
+}
+EXPORT_SYMBOL(l2cap_load);
+
+module_init(l2cap_init);
+module_exit(l2cap_exit);
+
+MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("bt-proto-0");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 11:10:22 +0000