#include <linux/list.h>
#include <linux/device.h>
#include <linux/uaccess.h>
+#include <linux/crc16.h>
#include <net/sock.h>
#include <asm/system.h>
return hci_send_acl(conn->hcon, skb, 0);
}
+static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control)
+{
+ struct sk_buff *skb;
+ struct l2cap_hdr *lh;
+ struct l2cap_conn *conn = pi->conn;
+ int count, hlen = L2CAP_HDR_SIZE + 2;
+
+ if (pi->fcs == L2CAP_FCS_CRC16)
+ hlen += 2;
+
+ BT_DBG("pi %p, control 0x%2.2x", pi, control);
+
+ count = min_t(unsigned int, conn->mtu, hlen);
+ control |= L2CAP_CTRL_FRAME_TYPE;
+
+ skb = bt_skb_alloc(count, GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
+
+ lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+ lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE);
+ lh->cid = cpu_to_le16(pi->dcid);
+ put_unaligned_le16(control, skb_put(skb, 2));
+
+ if (pi->fcs == L2CAP_FCS_CRC16) {
+ u16 fcs = crc16(0, (u8 *)lh, count - 2);
+ put_unaligned_le16(fcs, skb_put(skb, 2));
+ }
+
+ return hci_send_acl(pi->conn->hcon, skb, 0);
+}
+
+static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control)
+{
+ if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY)
+ control |= L2CAP_SUPER_RCV_NOT_READY;
+ else
+ control |= L2CAP_SUPER_RCV_READY;
+
+ return l2cap_send_sframe(pi, control);
+}
+
static void l2cap_do_start(struct sock *sk)
{
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
}
}
+static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk)
+{
+ 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);
+}
+
/* ---- L2CAP connections ---- */
static void l2cap_conn_start(struct l2cap_conn *conn)
{
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);
+ setup_timer(&conn->info_timer, l2cap_info_timeout,
+ (unsigned long) conn);
+
conn->disc_reason = 0x13;
return conn;
case BT_CONFIG:
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);
+ l2cap_send_disconn_req(conn, sk);
} else
l2cap_chan_del(sk, reason);
break;
pi->imtu = l2cap_pi(parent)->imtu;
pi->omtu = l2cap_pi(parent)->omtu;
+ pi->mode = l2cap_pi(parent)->mode;
+ pi->fcs = l2cap_pi(parent)->fcs;
pi->sec_level = l2cap_pi(parent)->sec_level;
pi->role_switch = l2cap_pi(parent)->role_switch;
pi->force_reliable = l2cap_pi(parent)->force_reliable;
} else {
pi->imtu = L2CAP_DEFAULT_MTU;
pi->omtu = 0;
+ pi->mode = L2CAP_MODE_BASIC;
+ pi->fcs = L2CAP_FCS_CRC16;
pi->sec_level = BT_SECURITY_LOW;
pi->role_switch = 0;
pi->force_reliable = 0;
/* Default config options */
pi->conf_len = 0;
pi->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+ skb_queue_head_init(TX_QUEUE(sk));
+ skb_queue_head_init(SREJ_QUEUE(sk));
+ INIT_LIST_HEAD(SREJ_LIST(sk));
}
static struct proto l2cap_proto = {
return sk;
}
-static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol)
+static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
{
struct sock *sk;
sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
return -ESOCKTNOSUPPORT;
- if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW))
+ if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
return -EPERM;
sock->ops = &l2cap_sock_ops;
goto done;
}
+ switch (l2cap_pi(sk)->mode) {
+ case L2CAP_MODE_BASIC:
+ break;
+ case L2CAP_MODE_ERTM:
+ case L2CAP_MODE_STREAMING:
+ if (enable_ertm)
+ break;
+ /* fall through */
+ default:
+ err = -ENOTSUPP;
+ goto done;
+ }
+
switch (sk->sk_state) {
case BT_CONNECT:
case BT_CONNECT2:
goto done;
}
+ switch (l2cap_pi(sk)->mode) {
+ case L2CAP_MODE_BASIC:
+ break;
+ case L2CAP_MODE_ERTM:
+ case L2CAP_MODE_STREAMING:
+ if (enable_ertm)
+ break;
+ /* fall through */
+ default:
+ err = -ENOTSUPP;
+ goto done;
+ }
+
if (!l2cap_pi(sk)->psm) {
bdaddr_t *src = &bt_sk(sk)->src;
u16 psm;
return 0;
}
-static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len)
+static void l2cap_monitor_timeout(unsigned long arg)
{
- 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);
+ struct sock *sk = (void *) arg;
+ u16 control;
- /* 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);
+ bh_lock_sock(sk);
+ if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) {
+ l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk);
+ return;
+ }
- skb = bt_skb_send_alloc(sk, hlen + count,
- msg->msg_flags & MSG_DONTWAIT, &err);
- if (!skb)
- return err;
+ l2cap_pi(sk)->retry_count++;
+ __mod_monitor_timer();
- /* 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));
+ control = L2CAP_CTRL_POLL;
+ l2cap_send_rr_or_rnr(l2cap_pi(sk), control);
+ bh_unlock_sock(sk);
+}
- if (sk->sk_type == SOCK_DGRAM)
- put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2));
+static void l2cap_retrans_timeout(unsigned long arg)
+{
+ struct sock *sk = (void *) arg;
+ u16 control;
- if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) {
- err = -EFAULT;
- goto fail;
- }
+ bh_lock_sock(sk);
+ l2cap_pi(sk)->retry_count = 1;
+ __mod_monitor_timer();
- sent += count;
- len -= count;
+ l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F;
- /* Continuation fragments (no L2CAP header) */
- frag = &skb_shinfo(skb)->frag_list;
- while (len) {
- count = min_t(unsigned int, conn->mtu, len);
+ control = L2CAP_CTRL_POLL;
+ l2cap_send_rr_or_rnr(l2cap_pi(sk), control);
+ bh_unlock_sock(sk);
+}
- *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err);
- if (!*frag)
- goto fail;
+static void l2cap_drop_acked_frames(struct sock *sk)
+{
+ struct sk_buff *skb;
- if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) {
- err = -EFAULT;
- goto fail;
- }
+ while ((skb = skb_peek(TX_QUEUE(sk)))) {
+ if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq)
+ break;
- sent += count;
- len -= count;
+ skb = skb_dequeue(TX_QUEUE(sk));
+ kfree_skb(skb);
- frag = &(*frag)->next;
+ l2cap_pi(sk)->unacked_frames--;
}
- err = hci_send_acl(conn->hcon, skb, 0);
- if (err < 0)
- goto fail;
- return sent;
+ if (!l2cap_pi(sk)->unacked_frames)
+ del_timer(&l2cap_pi(sk)->retrans_timer);
-fail:
- kfree_skb(skb);
- return err;
+ return;
}
-static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
+static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb)
{
- 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;
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ int err;
- lock_sock(sk);
+ BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len);
- if (sk->sk_state == BT_CONNECTED)
- err = l2cap_do_send(sk, msg, len);
- else
- err = -ENOTCONN;
+ err = hci_send_acl(pi->conn->hcon, skb, 0);
+ if (err < 0)
+ kfree_skb(skb);
- release_sock(sk);
return err;
}
-static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags)
+static int l2cap_streaming_send(struct sock *sk)
{
- struct sock *sk = sock->sk;
+ struct sk_buff *skb, *tx_skb;
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ u16 control, fcs;
+ int err;
- lock_sock(sk);
+ while ((skb = sk->sk_send_head)) {
+ tx_skb = skb_clone(skb, GFP_ATOMIC);
- if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) {
- struct l2cap_conn_rsp rsp;
+ control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
+ control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT;
+ put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
- sk->sk_state = BT_CONFIG;
+ if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) {
+ fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2);
+ put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2);
+ }
- rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
- rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
- rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
- rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
- l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident,
- L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+ err = l2cap_do_send(sk, tx_skb);
+ if (err < 0) {
+ l2cap_send_disconn_req(pi->conn, sk);
+ return err;
+ }
- release_sock(sk);
- return 0;
- }
+ pi->next_tx_seq = (pi->next_tx_seq + 1) % 64;
- release_sock(sk);
+ if (skb_queue_is_last(TX_QUEUE(sk), skb))
+ sk->sk_send_head = NULL;
+ else
+ sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb);
- return bt_sock_recvmsg(iocb, sock, msg, len, flags);
+ skb = skb_dequeue(TX_QUEUE(sk));
+ kfree_skb(skb);
+ }
+ return 0;
}
-static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen)
+static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq)
{
- struct sock *sk = sock->sk;
- struct l2cap_options opts;
- int len, err = 0;
- 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;
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct sk_buff *skb, *tx_skb;
+ u16 control, fcs;
+ int err;
- len = min_t(unsigned int, sizeof(opts), optlen);
- if (copy_from_user((char *) &opts, optval, len)) {
- err = -EFAULT;
- break;
+ skb = skb_peek(TX_QUEUE(sk));
+ do {
+ if (bt_cb(skb)->tx_seq != tx_seq) {
+ if (skb_queue_is_last(TX_QUEUE(sk), skb))
+ break;
+ skb = skb_queue_next(TX_QUEUE(sk), skb);
+ continue;
}
- 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;
+ if (pi->remote_max_tx &&
+ bt_cb(skb)->retries == pi->remote_max_tx) {
+ l2cap_send_disconn_req(pi->conn, sk);
break;
}
- if (opt & L2CAP_LM_AUTH)
- l2cap_pi(sk)->sec_level = BT_SECURITY_LOW;
- if (opt & L2CAP_LM_ENCRYPT)
- l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
- if (opt & L2CAP_LM_SECURE)
- l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH;
+ tx_skb = skb_clone(skb, GFP_ATOMIC);
+ bt_cb(skb)->retries++;
+ control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
+ control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT)
+ | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
+ put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
- l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER);
- l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE);
- break;
+ if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) {
+ fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2);
+ put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2);
+ }
- default:
- err = -ENOPROTOOPT;
+ err = l2cap_do_send(sk, tx_skb);
+ if (err < 0) {
+ l2cap_send_disconn_req(pi->conn, sk);
+ return err;
+ }
break;
- }
-
- release_sock(sk);
- return err;
+ } while(1);
+ return 0;
}
-static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+static int l2cap_ertm_send(struct sock *sk)
{
- struct sock *sk = sock->sk;
- struct bt_security sec;
- int len, err = 0;
- u32 opt;
-
- BT_DBG("sk %p", sk);
-
- if (level == SOL_L2CAP)
- return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);
+ struct sk_buff *skb, *tx_skb;
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ u16 control, fcs;
+ int err;
- if (level != SOL_BLUETOOTH)
- return -ENOPROTOOPT;
+ if (pi->conn_state & L2CAP_CONN_WAIT_F)
+ return 0;
- lock_sock(sk);
+ while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))
+ && !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) {
+ tx_skb = skb_clone(skb, GFP_ATOMIC);
- switch (optname) {
- case BT_SECURITY:
- if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) {
- err = -EINVAL;
+ if (pi->remote_max_tx &&
+ bt_cb(skb)->retries == pi->remote_max_tx) {
+ l2cap_send_disconn_req(pi->conn, sk);
break;
}
- sec.level = BT_SECURITY_LOW;
-
- len = min_t(unsigned int, sizeof(sec), optlen);
- if (copy_from_user((char *) &sec, optval, len)) {
- err = -EFAULT;
- break;
- }
+ bt_cb(skb)->retries++;
- if (sec.level < BT_SECURITY_LOW ||
- sec.level > BT_SECURITY_HIGH) {
- err = -EINVAL;
- break;
- }
+ control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
+ control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT)
+ | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
+ put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
- l2cap_pi(sk)->sec_level = sec.level;
- break;
- case BT_DEFER_SETUP:
- if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
- err = -EINVAL;
- break;
+ if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) {
+ fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2);
+ put_unaligned_le16(fcs, skb->data + tx_skb->len - 2);
}
- if (get_user(opt, (u32 __user *) optval)) {
- err = -EFAULT;
- break;
+ err = l2cap_do_send(sk, tx_skb);
+ if (err < 0) {
+ l2cap_send_disconn_req(pi->conn, sk);
+ return err;
}
+ __mod_retrans_timer();
- bt_sk(sk)->defer_setup = opt;
- break;
+ bt_cb(skb)->tx_seq = pi->next_tx_seq;
+ pi->next_tx_seq = (pi->next_tx_seq + 1) % 64;
- default:
- err = -ENOPROTOOPT;
- break;
+ pi->unacked_frames++;
+
+ if (skb_queue_is_last(TX_QUEUE(sk), skb))
+ sk->sk_send_head = NULL;
+ else
+ sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb);
}
- release_sock(sk);
- return err;
+ return 0;
}
-static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
+static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb)
{
- struct sock *sk = sock->sk;
- struct l2cap_options opts;
- struct l2cap_conninfo cinfo;
- int len, err = 0;
- u32 opt;
-
- BT_DBG("sk %p", sk);
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct sk_buff **frag;
+ int err, sent = 0;
- if (get_user(len, optlen))
+ if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) {
return -EFAULT;
+ }
- lock_sock(sk);
+ sent += count;
+ len -= count;
- switch (optname) {
- case L2CAP_OPTIONS:
- opts.imtu = l2cap_pi(sk)->imtu;
- opts.omtu = l2cap_pi(sk)->omtu;
+ /* 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)
+ return -EFAULT;
+ if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count))
+ return -EFAULT;
+
+ sent += count;
+ len -= count;
+
+ frag = &(*frag)->next;
+ }
+
+ return sent;
+}
+
+static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len)
+{
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct sk_buff *skb;
+ int err, count, hlen = L2CAP_HDR_SIZE + 2;
+ struct l2cap_hdr *lh;
+
+ BT_DBG("sk %p len %d", sk, (int)len);
+
+ count = min_t(unsigned int, (conn->mtu - hlen), len);
+ skb = bt_skb_send_alloc(sk, count + hlen,
+ msg->msg_flags & MSG_DONTWAIT, &err);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ /* 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));
+ put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2));
+
+ err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
+ if (unlikely(err < 0)) {
+ kfree_skb(skb);
+ return ERR_PTR(err);
+ }
+ return skb;
+}
+
+static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len)
+{
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct sk_buff *skb;
+ int err, count, hlen = L2CAP_HDR_SIZE;
+ struct l2cap_hdr *lh;
+
+ BT_DBG("sk %p len %d", sk, (int)len);
+
+ count = min_t(unsigned int, (conn->mtu - hlen), len);
+ skb = bt_skb_send_alloc(sk, count + hlen,
+ msg->msg_flags & MSG_DONTWAIT, &err);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ /* 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));
+
+ err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
+ if (unlikely(err < 0)) {
+ kfree_skb(skb);
+ return ERR_PTR(err);
+ }
+ return skb;
+}
+
+static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen)
+{
+ struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+ struct sk_buff *skb;
+ int err, count, hlen = L2CAP_HDR_SIZE + 2;
+ struct l2cap_hdr *lh;
+
+ BT_DBG("sk %p len %d", sk, (int)len);
+
+ if (sdulen)
+ hlen += 2;
+
+ if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16)
+ hlen += 2;
+
+ count = min_t(unsigned int, (conn->mtu - hlen), len);
+ skb = bt_skb_send_alloc(sk, count + hlen,
+ msg->msg_flags & MSG_DONTWAIT, &err);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ /* 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));
+ put_unaligned_le16(control, skb_put(skb, 2));
+ if (sdulen)
+ put_unaligned_le16(sdulen, skb_put(skb, 2));
+
+ err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
+ if (unlikely(err < 0)) {
+ kfree_skb(skb);
+ return ERR_PTR(err);
+ }
+
+ if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16)
+ put_unaligned_le16(0, skb_put(skb, 2));
+
+ bt_cb(skb)->retries = 0;
+ return skb;
+}
+
+static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct sk_buff *skb;
+ struct sk_buff_head sar_queue;
+ u16 control;
+ size_t size = 0;
+
+ __skb_queue_head_init(&sar_queue);
+ control = L2CAP_SDU_START;
+ skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ __skb_queue_tail(&sar_queue, skb);
+ len -= pi->max_pdu_size;
+ size +=pi->max_pdu_size;
+ control = 0;
+
+ while (len > 0) {
+ size_t buflen;
+
+ if (len > pi->max_pdu_size) {
+ control |= L2CAP_SDU_CONTINUE;
+ buflen = pi->max_pdu_size;
+ } else {
+ control |= L2CAP_SDU_END;
+ buflen = len;
+ }
+
+ skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0);
+ if (IS_ERR(skb)) {
+ skb_queue_purge(&sar_queue);
+ return PTR_ERR(skb);
+ }
+
+ __skb_queue_tail(&sar_queue, skb);
+ len -= buflen;
+ size += buflen;
+ control = 0;
+ }
+ skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk));
+ if (sk->sk_send_head == NULL)
+ sk->sk_send_head = sar_queue.next;
+
+ return size;
+}
+
+static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
+{
+ struct sock *sk = sock->sk;
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct sk_buff *skb;
+ u16 control;
+ int err;
+
+ 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_SEQPACKET && pi->mode == L2CAP_MODE_BASIC
+ && len > pi->omtu)
+ return -EINVAL;
+
+ lock_sock(sk);
+
+ if (sk->sk_state != BT_CONNECTED) {
+ err = -ENOTCONN;
+ goto done;
+ }
+
+ /* Connectionless channel */
+ if (sk->sk_type == SOCK_DGRAM) {
+ skb = l2cap_create_connless_pdu(sk, msg, len);
+ err = l2cap_do_send(sk, skb);
+ goto done;
+ }
+
+ switch (pi->mode) {
+ case L2CAP_MODE_BASIC:
+ /* Create a basic PDU */
+ skb = l2cap_create_basic_pdu(sk, msg, len);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ goto done;
+ }
+
+ err = l2cap_do_send(sk, skb);
+ if (!err)
+ err = len;
+ break;
+
+ case L2CAP_MODE_ERTM:
+ case L2CAP_MODE_STREAMING:
+ /* Entire SDU fits into one PDU */
+ if (len <= pi->max_pdu_size) {
+ control = L2CAP_SDU_UNSEGMENTED;
+ skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ goto done;
+ }
+ __skb_queue_tail(TX_QUEUE(sk), skb);
+ if (sk->sk_send_head == NULL)
+ sk->sk_send_head = skb;
+ } else {
+ /* Segment SDU into multiples PDUs */
+ err = l2cap_sar_segment_sdu(sk, msg, len);
+ if (err < 0)
+ goto done;
+ }
+
+ if (pi->mode == L2CAP_MODE_STREAMING)
+ err = l2cap_streaming_send(sk);
+ else
+ err = l2cap_ertm_send(sk);
+
+ if (!err)
+ err = len;
+ break;
+
+ default:
+ BT_DBG("bad state %1.1x", pi->mode);
+ err = -EINVAL;
+ }
+
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags)
+{
+ struct sock *sk = sock->sk;
+
+ lock_sock(sk);
+
+ if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) {
+ struct l2cap_conn_rsp rsp;
+
+ sk->sk_state = BT_CONFIG;
+
+ rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
+ rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
+ rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
+ rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+ l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident,
+ L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+
+ release_sock(sk);
+ return 0;
+ }
+
+ release_sock(sk);
+
+ return bt_sock_recvmsg(iocb, sock, msg, len, flags);
+}
+
+static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct l2cap_options opts;
+ int len, err = 0;
+ 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_pi(sk)->mode;
+ opts.fcs = l2cap_pi(sk)->fcs;
+
+ 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;
+ l2cap_pi(sk)->mode = opts.mode;
+ l2cap_pi(sk)->fcs = opts.fcs;
+ break;
+
+ case L2CAP_LM:
+ if (get_user(opt, (u32 __user *) optval)) {
+ err = -EFAULT;
+ break;
+ }
+
+ if (opt & L2CAP_LM_AUTH)
+ l2cap_pi(sk)->sec_level = BT_SECURITY_LOW;
+ if (opt & L2CAP_LM_ENCRYPT)
+ l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
+ if (opt & L2CAP_LM_SECURE)
+ l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH;
+
+ l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER);
+ l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE);
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct bt_security sec;
+ int len, err = 0;
+ u32 opt;
+
+ BT_DBG("sk %p", sk);
+
+ if (level == SOL_L2CAP)
+ return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);
+
+ if (level != SOL_BLUETOOTH)
+ return -ENOPROTOOPT;
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case BT_SECURITY:
+ if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) {
+ err = -EINVAL;
+ break;
+ }
+
+ sec.level = BT_SECURITY_LOW;
+
+ len = min_t(unsigned int, sizeof(sec), optlen);
+ if (copy_from_user((char *) &sec, optval, len)) {
+ err = -EFAULT;
+ break;
+ }
+
+ if (sec.level < BT_SECURITY_LOW ||
+ sec.level > BT_SECURITY_HIGH) {
+ err = -EINVAL;
+ break;
+ }
+
+ l2cap_pi(sk)->sec_level = sec.level;
+ break;
+
+ case BT_DEFER_SETUP:
+ if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (get_user(opt, (u32 __user *) optval)) {
+ err = -EFAULT;
+ break;
+ }
+
+ bt_sk(sk)->defer_setup = opt;
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int l2cap_sock_getsockopt_old(struct socket *sock, 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;
+ u32 opt;
+
+ 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;
+ opts.mode = l2cap_pi(sk)->mode;
+ opts.fcs = l2cap_pi(sk)->fcs;
len = min_t(unsigned int, len, sizeof(opts));
if (copy_to_user(optval, (char *) &opts, len))
*ptr += L2CAP_CONF_OPT_SIZE + len;
}
+static int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
+{
+ u32 local_feat_mask = l2cap_feat_mask;
+ if (enable_ertm)
+ local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING;
+
+ switch (mode) {
+ case L2CAP_MODE_ERTM:
+ return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask;
+ case L2CAP_MODE_STREAMING:
+ return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask;
+ default:
+ return 0x00;
+ }
+}
+
+static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask)
+{
+ switch (mode) {
+ case L2CAP_MODE_STREAMING:
+ case L2CAP_MODE_ERTM:
+ if (l2cap_mode_supported(mode, remote_feat_mask))
+ return mode;
+ /* fall through */
+ default:
+ return L2CAP_MODE_BASIC;
+ }
+}
+
static int l2cap_build_conf_req(struct sock *sk, void *data)
{
struct l2cap_pinfo *pi = l2cap_pi(sk);
struct l2cap_conf_req *req = data;
+ struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
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);
+ if (pi->num_conf_req || pi->num_conf_rsp)
+ goto done;
+
+ switch (pi->mode) {
+ case L2CAP_MODE_STREAMING:
+ case L2CAP_MODE_ERTM:
+ pi->conf_state |= L2CAP_CONF_STATE2_DEVICE;
+ if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask))
+ l2cap_send_disconn_req(pi->conn, sk);
+ break;
+ default:
+ pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask);
+ break;
+ }
+
+done:
+ switch (pi->mode) {
+ case L2CAP_MODE_BASIC:
+ if (pi->imtu != L2CAP_DEFAULT_MTU)
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
+ break;
+
+ case L2CAP_MODE_ERTM:
+ rfc.mode = L2CAP_MODE_ERTM;
+ rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW;
+ rfc.max_transmit = L2CAP_DEFAULT_MAX_TX;
+ rfc.retrans_timeout = 0;
+ rfc.monitor_timeout = 0;
+ rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
+
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ sizeof(rfc), (unsigned long) &rfc);
+
+ if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS))
+ break;
+
+ if (pi->fcs == L2CAP_FCS_NONE ||
+ pi->conf_state & L2CAP_CONF_NO_FCS_RECV) {
+ pi->fcs = L2CAP_FCS_NONE;
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs);
+ }
+ break;
+
+ case L2CAP_MODE_STREAMING:
+ rfc.mode = L2CAP_MODE_STREAMING;
+ rfc.txwin_size = 0;
+ rfc.max_transmit = 0;
+ rfc.retrans_timeout = 0;
+ rfc.monitor_timeout = 0;
+ rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
+
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ sizeof(rfc), (unsigned long) &rfc);
+
+ if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS))
+ break;
+
+ if (pi->fcs == L2CAP_FCS_NONE ||
+ pi->conf_state & L2CAP_CONF_NO_FCS_RECV) {
+ pi->fcs = L2CAP_FCS_NONE;
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs);
+ }
+ break;
+ }
/* FIXME: Need actual value of the flush timeout */
//if (flush_to != L2CAP_DEFAULT_FLUSH_TO)
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;
+ 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 & L2CAP_CONF_HINT;
+ type &= L2CAP_CONF_MASK;
+
+ 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;
+
+ case L2CAP_CONF_FCS:
+ if (val == L2CAP_FCS_NONE)
+ pi->conf_state |= L2CAP_CONF_NO_FCS_RECV;
+
+ break;
+
+ default:
+ if (hint)
+ break;
+
+ result = L2CAP_CONF_UNKNOWN;
+ *((u8 *) ptr++) = type;
+ break;
+ }
+ }
+
+ if (pi->num_conf_rsp || pi->num_conf_req)
+ goto done;
+
+ switch (pi->mode) {
+ case L2CAP_MODE_STREAMING:
+ case L2CAP_MODE_ERTM:
+ pi->conf_state |= L2CAP_CONF_STATE2_DEVICE;
+ if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask))
+ return -ECONNREFUSED;
+ break;
+ default:
+ pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask);
+ break;
+ }
+
+done:
+ if (pi->mode != rfc.mode) {
+ result = L2CAP_CONF_UNACCEPT;
+ rfc.mode = pi->mode;
+
+ if (pi->num_conf_rsp == 1)
+ return -ECONNREFUSED;
+
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ sizeof(rfc), (unsigned long) &rfc);
+ }
+
+
+ if (result == L2CAP_CONF_SUCCESS) {
+ /* Configure output options and let the other side know
+ * which ones we don't like. */
+
+ if (mtu < L2CAP_DEFAULT_MIN_MTU)
+ result = L2CAP_CONF_UNACCEPT;
+ else {
+ pi->omtu = mtu;
+ pi->conf_state |= L2CAP_CONF_MTU_DONE;
+ }
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
+
+ switch (rfc.mode) {
+ case L2CAP_MODE_BASIC:
+ pi->fcs = L2CAP_FCS_NONE;
+ pi->conf_state |= L2CAP_CONF_MODE_DONE;
+ break;
+
+ case L2CAP_MODE_ERTM:
+ pi->remote_tx_win = rfc.txwin_size;
+ pi->remote_max_tx = rfc.max_transmit;
+ pi->max_pdu_size = rfc.max_pdu_size;
+
+ rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
+ rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
+
+ pi->conf_state |= L2CAP_CONF_MODE_DONE;
+
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ sizeof(rfc), (unsigned long) &rfc);
+
+ break;
+
+ case L2CAP_MODE_STREAMING:
+ pi->remote_tx_win = rfc.txwin_size;
+ pi->max_pdu_size = rfc.max_pdu_size;
+
+ pi->conf_state |= L2CAP_CONF_MODE_DONE;
+
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ sizeof(rfc), (unsigned long) &rfc);
+
+ break;
+
+ default:
+ result = L2CAP_CONF_UNACCEPT;
+
+ memset(&rfc, 0, sizeof(rfc));
+ rfc.mode = pi->mode;
+ }
+
+ if (result == L2CAP_CONF_SUCCESS)
+ pi->conf_state |= L2CAP_CONF_OUTPUT_DONE;
+ }
+ 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_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct l2cap_conf_req *req = data;
+ void *ptr = req->data;
+ int type, olen;
+ unsigned long val;
+ struct l2cap_conf_rfc rfc;
- BT_DBG("sk %p", sk);
+ BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data);
while (len >= L2CAP_CONF_OPT_SIZE) {
- len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
-
- hint = type & L2CAP_CONF_HINT;
- type &= L2CAP_CONF_MASK;
+ len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
switch (type) {
case L2CAP_CONF_MTU:
- mtu = val;
+ if (val < L2CAP_DEFAULT_MIN_MTU) {
+ *result = L2CAP_CONF_UNACCEPT;
+ pi->omtu = L2CAP_DEFAULT_MIN_MTU;
+ } else
+ pi->omtu = val;
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
break;
case L2CAP_CONF_FLUSH_TO:
pi->flush_to = val;
- break;
-
- case L2CAP_CONF_QOS:
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
+ 2, pi->flush_to);
break;
case L2CAP_CONF_RFC:
if (olen == sizeof(rfc))
- memcpy(&rfc, (void *) val, olen);
- break;
+ memcpy(&rfc, (void *)val, olen);
- default:
- if (hint)
- break;
+ if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) &&
+ rfc.mode != pi->mode)
+ return -ECONNREFUSED;
- result = L2CAP_CONF_UNKNOWN;
- *((u8 *) ptr++) = type;
+ pi->mode = rfc.mode;
+ pi->fcs = 0;
+
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ sizeof(rfc), (unsigned long) &rfc);
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);
+ if (*result == L2CAP_CONF_SUCCESS) {
+ switch (rfc.mode) {
+ case L2CAP_MODE_ERTM:
+ pi->remote_tx_win = rfc.txwin_size;
+ pi->retrans_timeout = rfc.retrans_timeout;
+ pi->monitor_timeout = rfc.monitor_timeout;
+ pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size);
+ break;
+ case L2CAP_MODE_STREAMING:
+ pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size);
+ break;
}
}
- rsp->scid = cpu_to_le16(pi->dcid);
- rsp->result = cpu_to_le16(result);
- rsp->flags = cpu_to_le16(0x0000);
+ req->dcid = cpu_to_le16(pi->dcid);
+ req->flags = cpu_to_le16(0x0000);
return ptr - data;
}
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
l2cap_build_conf_req(sk, req), req);
+ l2cap_pi(sk)->num_conf_req++;
break;
case L2CAP_CR_PEND:
/* Complete config. */
len = l2cap_parse_conf_req(sk, rsp);
- if (len < 0)
+ if (len < 0) {
+ l2cap_send_disconn_req(conn, sk);
goto unlock;
+ }
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
+ l2cap_pi(sk)->num_conf_rsp++;
/* Reset config buffer. */
l2cap_pi(sk)->conf_len = 0;
goto unlock;
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
+ if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV)
+ || l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
+ l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
+
sk->sk_state = BT_CONNECTED;
+ l2cap_pi(sk)->next_tx_seq = 0;
+ l2cap_pi(sk)->expected_ack_seq = 0;
+ l2cap_pi(sk)->unacked_frames = 0;
+
+ setup_timer(&l2cap_pi(sk)->retrans_timer,
+ l2cap_retrans_timeout, (unsigned long) sk);
+ setup_timer(&l2cap_pi(sk)->monitor_timer,
+ l2cap_monitor_timeout, (unsigned long) sk);
+
+ __skb_queue_head_init(TX_QUEUE(sk));
+ __skb_queue_head_init(SREJ_QUEUE(sk));
l2cap_chan_ready(sk);
goto unlock;
}
u8 buf[64];
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
l2cap_build_conf_req(sk, buf), buf);
+ l2cap_pi(sk)->num_conf_req++;
}
unlock:
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;
+ if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
+ int len = cmd->len - sizeof(*rsp);
+ char req[64];
+
+ /* throw out any old stored conf requests */
+ result = L2CAP_CONF_SUCCESS;
+ len = l2cap_parse_conf_rsp(sk, rsp->data,
+ len, req, &result);
+ if (len < 0) {
+ l2cap_send_disconn_req(conn, sk);
+ goto done;
+ }
+
+ l2cap_send_cmd(conn, l2cap_get_ident(conn),
+ L2CAP_CONF_REQ, len, req);
+ l2cap_pi(sk)->num_conf_req++;
+ if (result != L2CAP_CONF_SUCCESS)
+ goto done;
+ break;
}
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);
- }
+ l2cap_send_disconn_req(conn, sk);
goto done;
}
l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE;
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) {
+ if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV)
+ || l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
+ l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
+
sk->sk_state = BT_CONNECTED;
+ l2cap_pi(sk)->expected_tx_seq = 0;
+ l2cap_pi(sk)->buffer_seq = 0;
+ l2cap_pi(sk)->num_to_ack = 0;
+ __skb_queue_head_init(TX_QUEUE(sk));
+ __skb_queue_head_init(SREJ_QUEUE(sk));
l2cap_chan_ready(sk);
}
sk->sk_shutdown = SHUTDOWN_MASK;
+ skb_queue_purge(TX_QUEUE(sk));
+ skb_queue_purge(SREJ_QUEUE(sk));
+ del_timer(&l2cap_pi(sk)->retrans_timer);
+ del_timer(&l2cap_pi(sk)->monitor_timer);
+
l2cap_chan_del(sk, ECONNRESET);
bh_unlock_sock(sk);
if (!sk)
return 0;
+ skb_queue_purge(TX_QUEUE(sk));
+ skb_queue_purge(SREJ_QUEUE(sk));
+ del_timer(&l2cap_pi(sk)->retrans_timer);
+ del_timer(&l2cap_pi(sk)->monitor_timer);
+
l2cap_chan_del(sk, 0);
bh_unlock_sock(sk);
rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
if (enable_ertm)
- feat_mask |= L2CAP_FEAT_ERTM;
- put_unaligned(cpu_to_le32(feat_mask), (__le32 *) rsp->data);
+ feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING
+ | L2CAP_FEAT_FCS;
+ put_unaligned_le32(feat_mask, rsp->data);
l2cap_send_cmd(conn, cmd->ident,
L2CAP_INFO_RSP, sizeof(buf), buf);
} else if (type == L2CAP_IT_FIXED_CHAN) {
kfree_skb(skb);
}
+static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb)
+{
+ u16 our_fcs, rcv_fcs;
+ int hdr_size = L2CAP_HDR_SIZE + 2;
+
+ if (pi->fcs == L2CAP_FCS_CRC16) {
+ skb_trim(skb, skb->len - 2);
+ rcv_fcs = get_unaligned_le16(skb->data + skb->len);
+ our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);
+
+ if (our_fcs != rcv_fcs)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar)
+{
+ struct sk_buff *next_skb;
+
+ bt_cb(skb)->tx_seq = tx_seq;
+ bt_cb(skb)->sar = sar;
+
+ next_skb = skb_peek(SREJ_QUEUE(sk));
+ if (!next_skb) {
+ __skb_queue_tail(SREJ_QUEUE(sk), skb);
+ return;
+ }
+
+ do {
+ if (bt_cb(next_skb)->tx_seq > tx_seq) {
+ __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb);
+ return;
+ }
+
+ if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb))
+ break;
+
+ } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb)));
+
+ __skb_queue_tail(SREJ_QUEUE(sk), skb);
+}
+
+static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct sk_buff *_skb;
+ int err = -EINVAL;
+
+ switch (control & L2CAP_CTRL_SAR) {
+ case L2CAP_SDU_UNSEGMENTED:
+ if (pi->conn_state & L2CAP_CONN_SAR_SDU) {
+ kfree_skb(pi->sdu);
+ break;
+ }
+
+ err = sock_queue_rcv_skb(sk, skb);
+ if (!err)
+ return 0;
+
+ break;
+
+ case L2CAP_SDU_START:
+ if (pi->conn_state & L2CAP_CONN_SAR_SDU) {
+ kfree_skb(pi->sdu);
+ break;
+ }
+
+ pi->sdu_len = get_unaligned_le16(skb->data);
+ skb_pull(skb, 2);
+
+ pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC);
+ if (!pi->sdu) {
+ err = -ENOMEM;
+ break;
+ }
+
+ memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
+
+ pi->conn_state |= L2CAP_CONN_SAR_SDU;
+ pi->partial_sdu_len = skb->len;
+ err = 0;
+ break;
+
+ case L2CAP_SDU_CONTINUE:
+ if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
+ break;
+
+ memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
+
+ pi->partial_sdu_len += skb->len;
+ if (pi->partial_sdu_len > pi->sdu_len)
+ kfree_skb(pi->sdu);
+ else
+ err = 0;
+
+ break;
+
+ case L2CAP_SDU_END:
+ if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
+ break;
+
+ memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
+
+ pi->conn_state &= ~L2CAP_CONN_SAR_SDU;
+ pi->partial_sdu_len += skb->len;
+
+ if (pi->partial_sdu_len == pi->sdu_len) {
+ _skb = skb_clone(pi->sdu, GFP_ATOMIC);
+ err = sock_queue_rcv_skb(sk, _skb);
+ if (err < 0)
+ kfree_skb(_skb);
+ }
+ kfree_skb(pi->sdu);
+ err = 0;
+
+ break;
+ }
+
+ kfree_skb(skb);
+ return err;
+}
+
+static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq)
+{
+ struct sk_buff *skb;
+ u16 control = 0;
+
+ while((skb = skb_peek(SREJ_QUEUE(sk)))) {
+ if (bt_cb(skb)->tx_seq != tx_seq)
+ break;
+
+ skb = skb_dequeue(SREJ_QUEUE(sk));
+ control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT;
+ l2cap_sar_reassembly_sdu(sk, skb, control);
+ l2cap_pi(sk)->buffer_seq_srej =
+ (l2cap_pi(sk)->buffer_seq_srej + 1) % 64;
+ tx_seq++;
+ }
+}
+
+static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct srej_list *l, *tmp;
+ u16 control;
+
+ list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) {
+ if (l->tx_seq == tx_seq) {
+ list_del(&l->list);
+ kfree(l);
+ return;
+ }
+ control = L2CAP_SUPER_SELECT_REJECT;
+ control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+ l2cap_send_sframe(pi, control);
+ list_del(&l->list);
+ list_add_tail(&l->list, SREJ_LIST(sk));
+ }
+}
+
+static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ struct srej_list *new;
+ u16 control;
+
+ while (tx_seq != pi->expected_tx_seq) {
+ control = L2CAP_SUPER_SELECT_REJECT;
+ control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+ if (pi->conn_state & L2CAP_CONN_SEND_PBIT) {
+ control |= L2CAP_CTRL_POLL;
+ pi->conn_state &= ~L2CAP_CONN_SEND_PBIT;
+ }
+ l2cap_send_sframe(pi, control);
+
+ new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC);
+ new->tx_seq = pi->expected_tx_seq++;
+ list_add_tail(&new->list, SREJ_LIST(sk));
+ }
+ pi->expected_tx_seq++;
+}
+
+static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ u8 tx_seq = __get_txseq(rx_control);
+ u16 tx_control = 0;
+ u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT;
+ int err = 0;
+
+ BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
+
+ if (tx_seq == pi->expected_tx_seq)
+ goto expected;
+
+ if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
+ struct srej_list *first;
+
+ first = list_first_entry(SREJ_LIST(sk),
+ struct srej_list, list);
+ if (tx_seq == first->tx_seq) {
+ l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+ l2cap_check_srej_gap(sk, tx_seq);
+
+ list_del(&first->list);
+ kfree(first);
+
+ if (list_empty(SREJ_LIST(sk))) {
+ pi->buffer_seq = pi->buffer_seq_srej;
+ pi->conn_state &= ~L2CAP_CONN_SREJ_SENT;
+ }
+ } else {
+ struct srej_list *l;
+ l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+
+ list_for_each_entry(l, SREJ_LIST(sk), list) {
+ if (l->tx_seq == tx_seq) {
+ l2cap_resend_srejframe(sk, tx_seq);
+ return 0;
+ }
+ }
+ l2cap_send_srejframe(sk, tx_seq);
+ }
+ } else {
+ pi->conn_state |= L2CAP_CONN_SREJ_SENT;
+
+ INIT_LIST_HEAD(SREJ_LIST(sk));
+ pi->buffer_seq_srej = pi->buffer_seq;
+
+ __skb_queue_head_init(SREJ_QUEUE(sk));
+ l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+
+ pi->conn_state |= L2CAP_CONN_SEND_PBIT;
+
+ l2cap_send_srejframe(sk, tx_seq);
+ }
+ return 0;
+
+expected:
+ pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
+
+ if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
+ l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+ return 0;
+ }
+
+ pi->buffer_seq = (pi->buffer_seq + 1) % 64;
+
+ err = l2cap_sar_reassembly_sdu(sk, skb, rx_control);
+ if (err < 0)
+ return err;
+
+ pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK;
+ if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) {
+ tx_control |= L2CAP_SUPER_RCV_READY;
+ tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+ l2cap_send_sframe(pi, tx_control);
+ }
+ return 0;
+}
+
+static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb)
+{
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+ u8 tx_seq = __get_reqseq(rx_control);
+
+ BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
+
+ switch (rx_control & L2CAP_CTRL_SUPERVISE) {
+ case L2CAP_SUPER_RCV_READY:
+ if (rx_control & L2CAP_CTRL_POLL) {
+ u16 control = L2CAP_CTRL_FINAL;
+ control |= L2CAP_SUPER_RCV_READY |
+ (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT);
+ l2cap_send_sframe(l2cap_pi(sk), control);
+ pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+
+ } else if (rx_control & L2CAP_CTRL_FINAL) {
+ pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+ pi->expected_ack_seq = tx_seq;
+ l2cap_drop_acked_frames(sk);
+
+ if (!(pi->conn_state & L2CAP_CONN_WAIT_F))
+ break;
+
+ pi->conn_state &= ~L2CAP_CONN_WAIT_F;
+ del_timer(&pi->monitor_timer);
+
+ if (pi->unacked_frames > 0)
+ __mod_retrans_timer();
+ } else {
+ pi->expected_ack_seq = tx_seq;
+ l2cap_drop_acked_frames(sk);
+
+ if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY)
+ && (pi->unacked_frames > 0))
+ __mod_retrans_timer();
+
+ l2cap_ertm_send(sk);
+ pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+ }
+ break;
+
+ case L2CAP_SUPER_REJECT:
+ pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+
+ pi->expected_ack_seq = __get_reqseq(rx_control);
+ l2cap_drop_acked_frames(sk);
+
+ sk->sk_send_head = TX_QUEUE(sk)->next;
+ pi->next_tx_seq = pi->expected_ack_seq;
+
+ l2cap_ertm_send(sk);
+
+ break;
+
+ case L2CAP_SUPER_SELECT_REJECT:
+ pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+
+ if (rx_control & L2CAP_CTRL_POLL) {
+ l2cap_retransmit_frame(sk, tx_seq);
+ pi->expected_ack_seq = tx_seq;
+ l2cap_drop_acked_frames(sk);
+ l2cap_ertm_send(sk);
+ if (pi->conn_state & L2CAP_CONN_WAIT_F) {
+ pi->srej_save_reqseq = tx_seq;
+ pi->conn_state |= L2CAP_CONN_SREJ_ACT;
+ }
+ } else if (rx_control & L2CAP_CTRL_FINAL) {
+ if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) &&
+ pi->srej_save_reqseq == tx_seq)
+ pi->srej_save_reqseq &= ~L2CAP_CONN_SREJ_ACT;
+ else
+ l2cap_retransmit_frame(sk, tx_seq);
+ }
+ else {
+ l2cap_retransmit_frame(sk, tx_seq);
+ if (pi->conn_state & L2CAP_CONN_WAIT_F) {
+ pi->srej_save_reqseq = tx_seq;
+ pi->conn_state |= L2CAP_CONN_SREJ_ACT;
+ }
+ }
+ break;
+
+ case L2CAP_SUPER_RCV_NOT_READY:
+ pi->conn_state |= L2CAP_CONN_REMOTE_BUSY;
+ pi->expected_ack_seq = tx_seq;
+ l2cap_drop_acked_frames(sk);
+
+ del_timer(&l2cap_pi(sk)->retrans_timer);
+ if (rx_control & L2CAP_CTRL_POLL) {
+ u16 control = L2CAP_CTRL_FINAL;
+ l2cap_send_rr_or_rnr(l2cap_pi(sk), control);
+ }
+ break;
+ }
+
+ return 0;
+}
+
static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb)
{
struct sock *sk;
+ struct l2cap_pinfo *pi;
+ u16 control, len;
+ u8 tx_seq;
+ int err;
sk = l2cap_get_chan_by_scid(&conn->chan_list, cid);
if (!sk) {
goto drop;
}
+ pi = l2cap_pi(sk);
+
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;
+ switch (pi->mode) {
+ case L2CAP_MODE_BASIC:
+ /* 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 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 (pi->imtu < skb->len)
+ goto drop;
+
+ if (!sock_queue_rcv_skb(sk, skb))
+ goto done;
+ break;
+
+ case L2CAP_MODE_ERTM:
+ control = get_unaligned_le16(skb->data);
+ skb_pull(skb, 2);
+ len = skb->len;
+
+ if (__is_sar_start(control))
+ len -= 2;
+
+ if (pi->fcs == L2CAP_FCS_CRC16)
+ len -= 2;
+
+ /*
+ * We can just drop the corrupted I-frame here.
+ * Receiver will miss it and start proper recovery
+ * procedures and ask retransmission.
+ */
+ if (len > L2CAP_DEFAULT_MAX_PDU_SIZE)
+ goto drop;
+
+ if (l2cap_check_fcs(pi, skb))
+ goto drop;
+
+ if (__is_iframe(control))
+ err = l2cap_data_channel_iframe(sk, control, skb);
+ else
+ err = l2cap_data_channel_sframe(sk, control, skb);
+
+ if (!err)
+ goto done;
+ break;
+
+ case L2CAP_MODE_STREAMING:
+ control = get_unaligned_le16(skb->data);
+ skb_pull(skb, 2);
+ len = skb->len;
+
+ if (__is_sar_start(control))
+ len -= 2;
+
+ if (pi->fcs == L2CAP_FCS_CRC16)
+ len -= 2;
+
+ if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control))
+ goto drop;
+
+ if (l2cap_check_fcs(pi, skb))
+ goto drop;
+
+ tx_seq = __get_txseq(control);
+
+ if (pi->expected_tx_seq == tx_seq)
+ pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
+ else
+ pi->expected_tx_seq = tx_seq + 1;
+
+ err = l2cap_sar_reassembly_sdu(sk, skb, control);
- if (!sock_queue_rcv_skb(sk, skb))
goto done;
+ default:
+ BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode);
+ break;
+ }
+
drop:
kfree_skb(skb);
cid = __le16_to_cpu(lh->cid);
len = __le16_to_cpu(lh->len);
+ if (len != skb->len) {
+ kfree_skb(skb);
+ return;
+ }
+
BT_DBG("len %d, cid 0x%4.4x", len, cid);
switch (cid) {
break;
case L2CAP_CID_CONN_LESS:
- psm = get_unaligned((__le16 *) skb->data);
+ psm = get_unaligned_le16(skb->data);
skb_pull(skb, 2);
l2cap_conless_channel(conn, psm, skb);
break;
.getsockopt = l2cap_sock_getsockopt
};
-static struct net_proto_family l2cap_sock_family_ops = {
+static const struct net_proto_family l2cap_sock_family_ops = {
.family = PF_BLUETOOTH,
.owner = THIS_MODULE,
.create = l2cap_sock_create,
Code Review / linux-2.6.git / blobdiff