From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/net/bluetooth/l2cap_sock.c | 290 +++++++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 259 insertions(+), 31 deletions(-)
diff --git a/kernel/net/bluetooth/l2cap_sock.c b/kernel/net/bluetooth/l2cap_sock.c
index d938311..756523e 100644
--- a/kernel/net/bluetooth/l2cap_sock.c
+++ b/kernel/net/bluetooth/l2cap_sock.c
@@ -45,6 +45,7 @@
static void l2cap_sock_init(struct sock *sk, struct sock *parent);
static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
int proto, gfp_t prio, int kern);
+static void l2cap_sock_cleanup_listen(struct sock *parent);
bool l2cap_is_socket(struct socket *sock)
{
@@ -161,7 +162,11 @@
break;
}
- if (chan->psm && bdaddr_type_is_le(chan->src_type))
+ /* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and
+ * L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set.
+ */
+ if (chan->psm && bdaddr_type_is_le(chan->src_type) &&
+ chan->mode != L2CAP_MODE_EXT_FLOWCTL)
chan->mode = L2CAP_MODE_LE_FLOWCTL;
chan->state = BT_BOUND;
@@ -170,6 +175,21 @@
done:
release_sock(sk);
return err;
+}
+
+static void l2cap_sock_init_pid(struct sock *sk)
+{
+ struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+ /* Only L2CAP_MODE_EXT_FLOWCTL ever need to access the PID in order to
+ * group the channels being requested.
+ */
+ if (chan->mode != L2CAP_MODE_EXT_FLOWCTL)
+ return;
+
+ spin_lock(&sk->sk_peer_lock);
+ sk->sk_peer_pid = get_pid(task_tgid(current));
+ spin_unlock(&sk->sk_peer_lock);
}
static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
@@ -240,8 +260,14 @@
return -EINVAL;
}
- if (chan->psm && bdaddr_type_is_le(chan->src_type))
+ /* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and
+ * L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set.
+ */
+ if (chan->psm && bdaddr_type_is_le(chan->src_type) &&
+ chan->mode != L2CAP_MODE_EXT_FLOWCTL)
chan->mode = L2CAP_MODE_LE_FLOWCTL;
+
+ l2cap_sock_init_pid(sk);
err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
&la.l2_bdaddr, la.l2_bdaddr_type);
@@ -282,15 +308,23 @@
case L2CAP_MODE_BASIC:
case L2CAP_MODE_LE_FLOWCTL:
break;
+ case L2CAP_MODE_EXT_FLOWCTL:
+ if (!enable_ecred) {
+ err = -EOPNOTSUPP;
+ goto done;
+ }
+ break;
case L2CAP_MODE_ERTM:
case L2CAP_MODE_STREAMING:
if (!disable_ertm)
break;
- /* fall through */
+ fallthrough;
default:
err = -EOPNOTSUPP;
goto done;
}
+
+ l2cap_sock_init_pid(sk);
sk->sk_max_ack_backlog = backlog;
sk->sk_ack_backlog = 0;
@@ -397,6 +431,24 @@
return sizeof(struct sockaddr_l2);
}
+static int l2cap_get_mode(struct l2cap_chan *chan)
+{
+ switch (chan->mode) {
+ case L2CAP_MODE_BASIC:
+ return BT_MODE_BASIC;
+ case L2CAP_MODE_ERTM:
+ return BT_MODE_ERTM;
+ case L2CAP_MODE_STREAMING:
+ return BT_MODE_STREAMING;
+ case L2CAP_MODE_LE_FLOWCTL:
+ return BT_MODE_LE_FLOWCTL;
+ case L2CAP_MODE_EXT_FLOWCTL:
+ return BT_MODE_EXT_FLOWCTL;
+ }
+
+ return -EINVAL;
+}
+
static int l2cap_sock_getsockopt_old(struct socket *sock, int optname,
char __user *optval, int __user *optlen)
{
@@ -426,6 +478,20 @@
break;
}
+ /* Only BR/EDR modes are supported here */
+ switch (chan->mode) {
+ case L2CAP_MODE_BASIC:
+ case L2CAP_MODE_ERTM:
+ case L2CAP_MODE_STREAMING:
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ if (err < 0)
+ break;
+
memset(&opts, 0, sizeof(opts));
opts.imtu = chan->imtu;
opts.omtu = chan->omtu;
@@ -434,6 +500,8 @@
opts.fcs = chan->fcs;
opts.max_tx = chan->max_tx;
opts.txwin_size = chan->tx_win;
+
+ BT_DBG("mode 0x%2.2x", chan->mode);
len = min_t(unsigned int, len, sizeof(opts));
if (copy_to_user(optval, (char *) &opts, len))
@@ -507,7 +575,8 @@
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
struct bt_security sec;
struct bt_power pwr;
- int len, err = 0;
+ u32 phys;
+ int len, mode, err = 0;
BT_DBG("sk %p", sk);
@@ -611,6 +680,39 @@
err = -EFAULT;
break;
+ case BT_PHY:
+ if (sk->sk_state != BT_CONNECTED) {
+ err = -ENOTCONN;
+ break;
+ }
+
+ phys = hci_conn_get_phy(chan->conn->hcon);
+
+ if (put_user(phys, (u32 __user *) optval))
+ err = -EFAULT;
+ break;
+
+ case BT_MODE:
+ if (!enable_ecred) {
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+ err = -EINVAL;
+ break;
+ }
+
+ mode = l2cap_get_mode(chan);
+ if (mode < 0) {
+ err = mode;
+ break;
+ }
+
+ if (put_user(mode, (u8 __user *) optval))
+ err = -EFAULT;
+ break;
+
default:
err = -ENOPROTOOPT;
break;
@@ -637,7 +739,7 @@
}
static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
- char __user *optval, unsigned int optlen)
+ sockptr_t optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
@@ -670,7 +772,7 @@
opts.txwin_size = chan->tx_win;
len = min_t(unsigned int, sizeof(opts), optlen);
- if (copy_from_user((char *) &opts, optval, len)) {
+ if (copy_from_sockptr(&opts, optval, len)) {
err = -EFAULT;
break;
}
@@ -685,10 +787,8 @@
break;
}
- chan->mode = opts.mode;
- switch (chan->mode) {
- case L2CAP_MODE_LE_FLOWCTL:
- break;
+ /* Only BR/EDR modes are supported here */
+ switch (opts.mode) {
case L2CAP_MODE_BASIC:
clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
break;
@@ -696,11 +796,18 @@
case L2CAP_MODE_STREAMING:
if (!disable_ertm)
break;
- /* fall through */
+ fallthrough;
default:
err = -EINVAL;
break;
}
+
+ if (err < 0)
+ break;
+
+ chan->mode = opts.mode;
+
+ BT_DBG("mode 0x%2.2x", chan->mode);
chan->imtu = opts.imtu;
chan->omtu = opts.omtu;
@@ -711,7 +818,7 @@
break;
case L2CAP_LM:
- if (get_user(opt, (u32 __user *) optval)) {
+ if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
err = -EFAULT;
break;
}
@@ -748,8 +855,47 @@
return err;
}
+static int l2cap_set_mode(struct l2cap_chan *chan, u8 mode)
+{
+ switch (mode) {
+ case BT_MODE_BASIC:
+ if (bdaddr_type_is_le(chan->src_type))
+ return -EINVAL;
+ mode = L2CAP_MODE_BASIC;
+ clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
+ break;
+ case BT_MODE_ERTM:
+ if (!disable_ertm || bdaddr_type_is_le(chan->src_type))
+ return -EINVAL;
+ mode = L2CAP_MODE_ERTM;
+ break;
+ case BT_MODE_STREAMING:
+ if (!disable_ertm || bdaddr_type_is_le(chan->src_type))
+ return -EINVAL;
+ mode = L2CAP_MODE_STREAMING;
+ break;
+ case BT_MODE_LE_FLOWCTL:
+ if (!bdaddr_type_is_le(chan->src_type))
+ return -EINVAL;
+ mode = L2CAP_MODE_LE_FLOWCTL;
+ break;
+ case BT_MODE_EXT_FLOWCTL:
+ /* TODO: Add support for ECRED PDUs to BR/EDR */
+ if (!bdaddr_type_is_le(chan->src_type))
+ return -EINVAL;
+ mode = L2CAP_MODE_EXT_FLOWCTL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ chan->mode = mode;
+
+ return 0;
+}
+
static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, unsigned int optlen)
+ sockptr_t optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
@@ -758,6 +904,8 @@
struct l2cap_conn *conn;
int len, err = 0;
u32 opt;
+ u16 mtu;
+ u8 mode;
BT_DBG("sk %p", sk);
@@ -781,7 +929,7 @@
sec.level = BT_SECURITY_LOW;
len = min_t(unsigned int, sizeof(sec), optlen);
- if (copy_from_user((char *) &sec, optval, len)) {
+ if (copy_from_sockptr(&sec, optval, len)) {
err = -EFAULT;
break;
}
@@ -799,10 +947,13 @@
conn = chan->conn;
- /*change security for LE channels */
+ /* change security for LE channels */
if (chan->scid == L2CAP_CID_ATT) {
- if (smp_conn_security(conn->hcon, sec.level))
+ if (smp_conn_security(conn->hcon, sec.level)) {
+ err = -EINVAL;
break;
+ }
+
set_bit(FLAG_PENDING_SECURITY, &chan->flags);
sk->sk_state = BT_CONFIG;
chan->state = BT_CONFIG;
@@ -826,7 +977,7 @@
break;
}
- if (get_user(opt, (u32 __user *) optval)) {
+ if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
err = -EFAULT;
break;
}
@@ -841,7 +992,7 @@
break;
case BT_FLUSHABLE:
- if (get_user(opt, (u32 __user *) optval)) {
+ if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
err = -EFAULT;
break;
}
@@ -877,7 +1028,7 @@
pwr.force_active = BT_POWER_FORCE_ACTIVE_ON;
len = min_t(unsigned int, sizeof(pwr), optlen);
- if (copy_from_user((char *) &pwr, optval, len)) {
+ if (copy_from_sockptr(&pwr, optval, len)) {
err = -EFAULT;
break;
}
@@ -889,7 +1040,7 @@
break;
case BT_CHANNEL_POLICY:
- if (get_user(opt, (u32 __user *) optval)) {
+ if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
err = -EFAULT;
break;
}
@@ -931,17 +1082,56 @@
break;
}
- if (sk->sk_state == BT_CONNECTED) {
+ if (chan->mode == L2CAP_MODE_LE_FLOWCTL &&
+ sk->sk_state == BT_CONNECTED) {
err = -EISCONN;
break;
}
- if (get_user(opt, (u16 __user *) optval)) {
+ if (copy_from_sockptr(&mtu, optval, sizeof(u16))) {
err = -EFAULT;
break;
}
- chan->imtu = opt;
+ if (chan->mode == L2CAP_MODE_EXT_FLOWCTL &&
+ sk->sk_state == BT_CONNECTED)
+ err = l2cap_chan_reconfigure(chan, mtu);
+ else
+ chan->imtu = mtu;
+
+ break;
+
+ case BT_MODE:
+ if (!enable_ecred) {
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ BT_DBG("sk->sk_state %u", sk->sk_state);
+
+ if (sk->sk_state != BT_BOUND) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (copy_from_sockptr(&mode, optval, sizeof(u8))) {
+ err = -EFAULT;
+ break;
+ }
+
+ BT_DBG("mode %u", mode);
+
+ err = l2cap_set_mode(chan, mode);
+ if (err)
+ break;
+
+ BT_DBG("mode 0x%2.2x", chan->mode);
+
break;
default:
@@ -996,7 +1186,11 @@
if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP,
&bt_sk(sk)->flags)) {
- if (bdaddr_type_is_le(pi->chan->src_type)) {
+ if (pi->chan->mode == L2CAP_MODE_EXT_FLOWCTL) {
+ sk->sk_state = BT_CONNECTED;
+ pi->chan->state = BT_CONNECTED;
+ __l2cap_ecred_conn_rsp_defer(pi->chan);
+ } else if (bdaddr_type_is_le(pi->chan->src_type)) {
sk->sk_state = BT_CONNECTED;
pi->chan->state = BT_CONNECTED;
__l2cap_le_connect_rsp_defer(pi->chan);
@@ -1115,14 +1309,21 @@
struct l2cap_conn *conn;
int err = 0;
- BT_DBG("sock %p, sk %p", sock, sk);
+ BT_DBG("sock %p, sk %p, how %d", sock, sk, how);
+
+ /* 'how' parameter is mapped to sk_shutdown as follows:
+ * SHUT_RD (0) --> RCV_SHUTDOWN (1)
+ * SHUT_WR (1) --> SEND_SHUTDOWN (2)
+ * SHUT_RDWR (2) --> SHUTDOWN_MASK (3)
+ */
+ how++;
if (!sk)
return 0;
lock_sock(sk);
- if (sk->sk_shutdown)
+ if ((sk->sk_shutdown & how) == how)
goto shutdown_already;
BT_DBG("Handling sock shutdown");
@@ -1145,11 +1346,20 @@
* has already been actioned to close the L2CAP
* link such as by l2cap_disconnection_req().
*/
- if (sk->sk_shutdown)
- goto has_shutdown;
+ if ((sk->sk_shutdown & how) == how)
+ goto shutdown_matched;
}
- sk->sk_shutdown = SHUTDOWN_MASK;
+ /* Try setting the RCV_SHUTDOWN bit, return early if SEND_SHUTDOWN
+ * is already set
+ */
+ if ((how & RCV_SHUTDOWN) && !(sk->sk_shutdown & RCV_SHUTDOWN)) {
+ sk->sk_shutdown |= RCV_SHUTDOWN;
+ if ((sk->sk_shutdown & how) == how)
+ goto shutdown_matched;
+ }
+
+ sk->sk_shutdown |= SEND_SHUTDOWN;
release_sock(sk);
l2cap_chan_lock(chan);
@@ -1179,7 +1389,7 @@
err = bt_sock_wait_state(sk, BT_CLOSED,
sk->sk_lingertime);
-has_shutdown:
+shutdown_matched:
l2cap_chan_put(chan);
sock_put(sk);
@@ -1205,9 +1415,10 @@
if (!sk)
return 0;
+ l2cap_sock_cleanup_listen(sk);
bt_sock_unlink(&l2cap_sk_list, sk);
- err = l2cap_sock_shutdown(sock, 2);
+ err = l2cap_sock_shutdown(sock, SHUT_RDWR);
chan = l2cap_pi(sk)->chan;
l2cap_chan_hold(chan);
@@ -1414,6 +1625,14 @@
if (!skb)
return ERR_PTR(err);
+ /* Channel lock is released before requesting new skb and then
+ * reacquired thus we need to recheck channel state.
+ */
+ if (chan->state != BT_CONNECTED) {
+ kfree_skb(skb);
+ return ERR_PTR(-ENOTCONN);
+ }
+
skb->priority = sk->sk_priority;
bt_cb(skb)->l2cap.chan = chan;
@@ -1483,6 +1702,13 @@
return sk->sk_sndtimeo;
}
+static struct pid *l2cap_sock_get_peer_pid_cb(struct l2cap_chan *chan)
+{
+ struct sock *sk = chan->data;
+
+ return sk->sk_peer_pid;
+}
+
static void l2cap_sock_suspend_cb(struct l2cap_chan *chan)
{
struct sock *sk = chan->data;
@@ -1517,6 +1743,7 @@
.suspend = l2cap_sock_suspend_cb,
.set_shutdown = l2cap_sock_set_shutdown_cb,
.get_sndtimeo = l2cap_sock_get_sndtimeo_cb,
+ .get_peer_pid = l2cap_sock_get_peer_pid_cb,
.alloc_skb = l2cap_sock_alloc_skb_cb,
.filter = l2cap_sock_filter,
};
@@ -1698,6 +1925,7 @@
.recvmsg = l2cap_sock_recvmsg,
.poll = bt_sock_poll,
.ioctl = bt_sock_ioctl,
+ .gettstamp = sock_gettstamp,
.mmap = sock_no_mmap,
.socketpair = sock_no_socketpair,
.shutdown = l2cap_sock_shutdown,
--
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