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Diffstat (limited to 'net/bluetooth/l2cap.c')
-rw-r--r--net/bluetooth/l2cap.c2392
1 files changed, 0 insertions, 2392 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
deleted file mode 100644
index 2957df4b6c0..00000000000
--- a/net/bluetooth/l2cap.c
+++ /dev/null
@@ -1,2392 +0,0 @@
-/*
- 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/module.h>
-
-#include <linux/types.h>
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/poll.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/socket.h>
-#include <linux/skbuff.h>
-#include <linux/list.h>
-#include <linux/device.h>
-#include <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 "2.9"
-
-static u32 l2cap_feat_mask = 0x0000;
-
-static const struct proto_ops l2cap_sock_ops;
-
-static struct bt_sock_list l2cap_sk_list = {
- .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
-};
-
-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);
-}
-
-/* ---- 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_bh(&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_bh(&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 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_bh(&conn->lock);
-
- if (++conn->tx_ident > 128)
- conn->tx_ident = 1;
-
- id = conn->tx_ident;
-
- spin_unlock_bh(&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);
-}
-
-/* ---- L2CAP connections ---- */
-static void l2cap_conn_start(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);
-}
-
-static void l2cap_conn_ready(struct l2cap_conn *conn)
-{
- BT_DBG("conn %p", conn);
-
- if (conn->chan_list.head || !hlist_empty(&l2cap_sk_list.head)) {
- struct l2cap_info_req req;
-
- req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
-
- conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
- conn->info_ident = l2cap_get_ident(conn);
-
- mod_timer(&conn->info_timer,
- jiffies + msecs_to_jiffies(L2CAP_INFO_TIMEOUT));
-
- l2cap_send_cmd(conn, conn->info_ident,
- L2CAP_INFO_REQ, sizeof(req), &req);
- }
-}
-
-/* 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_info_timeout(unsigned long arg)
-{
- struct l2cap_conn *conn = (void *) arg;
-
- conn->info_ident = 0;
-
- l2cap_conn_start(conn);
-}
-
-static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
-{
- struct l2cap_conn *conn = hcon->l2cap_data;
-
- if (conn || status)
- return conn;
-
- conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC);
- if (!conn)
- return NULL;
-
- hcon->l2cap_data = conn;
- conn->hcon = hcon;
-
- BT_DBG("hcon %p conn %p", hcon, conn);
-
- conn->mtu = hcon->hdev->acl_mtu;
- conn->src = &hcon->hdev->bdaddr;
- conn->dst = &hcon->dst;
-
- conn->feat_mask = 0;
-
- setup_timer(&conn->info_timer, l2cap_info_timeout, (unsigned long)conn);
-
- spin_lock_init(&conn->lock);
- rwlock_init(&conn->chan_list.lock);
-
- return conn;
-}
-
-static void l2cap_conn_del(struct hci_conn *hcon, int err)
-{
- struct l2cap_conn *conn = hcon->l2cap_data;
- struct sock *sk;
-
- if (!conn)
- return;
-
- 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);
- }
-
- if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
- del_timer_sync(&conn->info_timer);
-
- hcon->l2cap_data = NULL;
- kfree(conn);
-}
-
-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_bh(&l->lock);
- __l2cap_chan_add(conn, sk, parent);
- write_unlock_bh(&l->lock);
-}
-
-/* ---- Socket interface ---- */
-static struct sock *__l2cap_get_sock_by_addr(__le16 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, __le16 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, __le16 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_len = 0;
- 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 net *net, struct socket *sock, int proto, gfp_t prio)
-{
- struct sock *sk;
-
- sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto);
- if (!sk)
- return NULL;
-
- sock_init_data(sock, sk);
- INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
-
- sk->sk_destruct = l2cap_sock_destruct;
- sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT);
-
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- sk->sk_protocol = proto;
- sk->sk_state = BT_OPEN;
-
- setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long)sk);
-
- bt_sock_link(&l2cap_sk_list, sk);
- return sk;
-}
-
-static int l2cap_sock_create(struct net *net, 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(net, sock, protocol, GFP_ATOMIC);
- 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;
- }
-
- if (la->l2_psm && btohs(la->l2_psm) < 0x1001 &&
- !capable(CAP_NET_BIND_SERVICE)) {
- err = -EACCES;
- 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 (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)) {
- l2cap_conn_ready(conn);
- goto done;
- }
-
- 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(htobs(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_nested(sk, SINGLE_DEPTH_NESTING);
-
- 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_nested(sk, SINGLE_DEPTH_NESTING);
-
- 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, (__le16 *) 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);
-
- err = sock_error(sk);
- if (err)
- return err;
-
- 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:
- opts.imtu = l2cap_pi(sk)->imtu;
- opts.omtu = l2cap_pi(sk)->omtu;
- opts.flush_to = l2cap_pi(sk)->flush_to;
- opts.mode = L2CAP_MODE_BASIC;
-
- 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 = L2CAP_MODE_BASIC;
-
- 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;
-}
-
-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(*((__le16 *) opt->val));
- break;
-
- case 4:
- *val = __le32_to_cpu(*((__le32 *) 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 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:
- *((__le16 *) opt->val) = cpu_to_le16(val);
- break;
-
- case 4:
- *((__le32 *) 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 int l2cap_parse_conf_req(struct sock *sk, void *data)
-{
- struct l2cap_pinfo *pi = l2cap_pi(sk);
- struct l2cap_conf_rsp *rsp = data;
- void *ptr = rsp->data;
- void *req = pi->conf_req;
- int len = pi->conf_len;
- int type, hint, olen;
- unsigned long val;
- struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
- u16 mtu = L2CAP_DEFAULT_MTU;
- u16 result = L2CAP_CONF_SUCCESS;
-
- BT_DBG("sk %p", sk);
-
- while (len >= L2CAP_CONF_OPT_SIZE) {
- len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
-
- hint = type & 0x80;
- type &= 0x7f;
-
- switch (type) {
- case L2CAP_CONF_MTU:
- mtu = val;
- break;
-
- case L2CAP_CONF_FLUSH_TO:
- pi->flush_to = val;
- break;
-
- case L2CAP_CONF_QOS:
- break;
-
- case L2CAP_CONF_RFC:
- if (olen == sizeof(rfc))
- memcpy(&rfc, (void *) val, olen);
- break;
-
- default:
- if (hint)
- break;
-
- result = L2CAP_CONF_UNKNOWN;
- *((u8 *) ptr++) = type;
- break;
- }
- }
-
- if (result == L2CAP_CONF_SUCCESS) {
- /* Configure output options and let the other side know
- * which ones we don't like. */
-
- if (rfc.mode == L2CAP_MODE_BASIC) {
- if (mtu < pi->omtu)
- result = L2CAP_CONF_UNACCEPT;
- else {
- pi->omtu = mtu;
- pi->conf_state |= L2CAP_CONF_OUTPUT_DONE;
- }
-
- l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
- } else {
- result = L2CAP_CONF_UNACCEPT;
-
- memset(&rfc, 0, sizeof(rfc));
- rfc.mode = L2CAP_MODE_BASIC;
-
- l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
- sizeof(rfc), (unsigned long) &rfc);
- }
- }
-
- rsp->scid = cpu_to_le16(pi->dcid);
- rsp->result = cpu_to_le16(result);
- rsp->flags = cpu_to_le16(0x0000);
-
- return ptr - data;
-}
-
-static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags)
-{
- struct l2cap_conf_rsp *rsp = data;
- void *ptr = rsp->data;
-
- BT_DBG("sk %p", sk);
-
- rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid);
- rsp->result = cpu_to_le16(result);
- rsp->flags = cpu_to_le16(flags);
-
- return ptr - data;
-}
-
-static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
-{
- struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data;
-
- if (rej->reason != 0x0000)
- return 0;
-
- if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) &&
- cmd->ident == conn->info_ident) {
- conn->info_ident = 0;
- del_timer(&conn->info_timer);
- l2cap_conn_start(conn);
- }
-
- return 0;
-}
-
-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);
- __le16 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(parent->sk_net, NULL, BTPROTO_L2CAP, GFP_ATOMIC);
- if (!sk)
- goto response;
-
- write_lock_bh(&list->lock);
-
- /* Check if we already have channel with that dcid */
- if (__l2cap_get_chan_by_dcid(list, scid)) {
- write_unlock_bh(&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_bh(&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, u16 cmd_len, u8 *data)
-{
- struct l2cap_conf_req *req = (struct l2cap_conf_req *) data;
- u16 dcid, flags;
- u8 rsp[64];
- struct sock *sk;
- int len;
-
- 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;
-
- if (sk->sk_state == BT_DISCONN)
- goto unlock;
-
- /* Reject if config buffer is too small. */
- len = cmd_len - sizeof(*req);
- if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) {
- l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
- l2cap_build_conf_rsp(sk, rsp,
- L2CAP_CONF_REJECT, flags), rsp);
- goto unlock;
- }
-
- /* Store config. */
- memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len);
- l2cap_pi(sk)->conf_len += len;
-
- if (flags & 0x0001) {
- /* Incomplete config. Send empty response. */
- l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
- l2cap_build_conf_rsp(sk, rsp,
- L2CAP_CONF_SUCCESS, 0x0001), rsp);
- goto unlock;
- }
-
- /* Complete config. */
- len = l2cap_parse_conf_req(sk, rsp);
- if (len < 0)
- goto unlock;
-
- l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
-
- /* Reset config buffer. */
- l2cap_pi(sk)->conf_len = 0;
-
- if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE))
- goto unlock;
-
- if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
- sk->sk_state = BT_CONNECTED;
- l2cap_chan_ready(sk);
- goto unlock;
- }
-
- 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;
-
- 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;
- u16 type;
-
- type = __le16_to_cpu(req->type);
-
- BT_DBG("type 0x%4.4x", type);
-
- if (type == L2CAP_IT_FEAT_MASK) {
- u8 buf[8];
- struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
- rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
- rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
- put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data);
- l2cap_send_cmd(conn, cmd->ident,
- L2CAP_INFO_RSP, sizeof(buf), buf);
- } else {
- struct l2cap_info_rsp rsp;
- 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);
-
- conn->info_ident = 0;
-
- del_timer(&conn->info_timer);
-
- if (type == L2CAP_IT_FEAT_MASK)
- conn->feat_mask = __le32_to_cpu(get_unaligned((__le32 *) rsp->data));
-
- l2cap_conn_start(conn);
-
- 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) {
- u16 cmd_len;
- 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:
- l2cap_command_rej(conn, &cmd, data);
- 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, cmd_len, 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, __le16 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, len;
- __le16 psm;
-
- 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((__le16 *) 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)
-{
- struct l2cap_conn *conn;
-
- BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
-
- if (hcon->type != ACL_LINK)
- return 0;
-
- if (!status) {
- 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 = conn = hcon->l2cap_data;
- struct l2cap_conn_rsp rsp;
- struct sock *sk;
- int result;
-
- if (!conn)
- 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 = hcon->l2cap_data;
- struct l2cap_conn_rsp rsp;
- struct sock *sk;
- int result;
-
- if (!conn)
- 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;
-
- skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
- 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;
- }
-
- skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
- 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;
-}
-
-static ssize_t l2cap_sysfs_show(struct class *dev, char *buf)
-{
- struct sock *sk;
- struct hlist_node *node;
- char *str = buf;
-
- read_lock_bh(&l2cap_sk_list.lock);
-
- sk_for_each(sk, node, &l2cap_sk_list.head) {
- struct l2cap_pinfo *pi = l2cap_pi(sk);
-
- str += sprintf(str, "%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, btohs(pi->psm), pi->scid, pi->dcid,
- pi->imtu, pi->omtu, pi->link_mode);
- }
-
- read_unlock_bh(&l2cap_sk_list.lock);
-
- return (str - buf);
-}
-
-static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL);
-
-static const struct proto_ops l2cap_sock_ops = {
- .family = PF_BLUETOOTH,
- .owner = THIS_MODULE,
- .release = l2cap_sock_release,
- .bind = l2cap_sock_bind,
- .connect = l2cap_sock_connect,
- .listen = l2cap_sock_listen,
- .accept = l2cap_sock_accept,
- .getname = l2cap_sock_getname,
- .sendmsg = l2cap_sock_sendmsg,
- .recvmsg = 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;
- }
-
- if (class_create_file(bt_class, &class_attr_l2cap) < 0)
- BT_ERR("Failed to create L2CAP info file");
-
- 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)
-{
- class_remove_file(bt_class, &class_attr_l2cap);
-
- 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 v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 03:39:21 +0000