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Bluetooth: SMP: Add support for sending Pairing Request over BR/EDR

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This allows to send Pairing Request.

Jira: ZEP-605

Change-Id: I0ec2989e4dedb25a51e73b27689f0fd1893ceab8
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>
This commit is contained in:
Szymon Janc 2016-09-08 14:46:15 +02:00 • committed by Johan Hedberg
commit 777d2f5f30
1 changed files with 59 additions and 0 deletions
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59
net/bluetooth/smp.c
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@ -111,6 +111,7 @@ enum {
SMP_FLAG_SEC_REQ, /* if Security Request was sent/received */
SMP_FLAG_DHCHECK_WAIT, /* if waiting for remote DHCheck (as slave) */
SMP_FLAG_DERIVE_LK, /* if Link Key should be derived */
SMP_FLAG_BR_INITIATOR, /* if BR/EDR pairing initiator */
/* Total number of flags - must be at the end */
SMP_NUM_FLAGS,
@ -1187,6 +1188,58 @@ static int bt_smp_br_accept(struct bt_conn *conn, struct bt_l2cap_chan **chan)
return -ENOMEM;
}
static int smp_br_send_pairing_req(struct bt_smp *smp)
{
struct bt_conn *conn = smp->chan.chan.conn;
struct bt_smp_pairing *req;
struct net_buf *req_buf;
uint8_t max_key_size;
max_key_size = bt_conn_enc_key_size(conn);
if (!max_key_size) {
return -EIO;
}
smp_br_init(smp);
req_buf = smp_create_pdu(conn, BT_SMP_CMD_PAIRING_REQ, sizeof(*req));
if (!req_buf) {
return -ENOBUFS;
}
req = net_buf_add(req_buf, sizeof(*req));
/*
* If Secure Connections pairing has been initiated over BR/EDR, the IO
* Capability, OOB data flag and Auth Req fields of the SM Pairing
* Request/Response PDU shall be set to zero on transmission, and
* ignored on reception.
*/
req->auth_req = 0x00;
req->io_capability = 0x00;
req->oob_flag = 0x00;
req->max_key_size = max_key_size;
req->init_key_dist = BR_SEND_KEYS_SC;
req->resp_key_dist = BR_RECV_KEYS_SC;
smp_br_send(smp, req_buf);
/* Store Pairing Req for later use */
smp->preq[0] = BT_SMP_CMD_PAIRING_REQ;
memcpy(smp->preq + 1, req, sizeof(*req));
smp->local_dist = BR_SEND_KEYS_SC;
smp->remote_dist = BR_RECV_KEYS_SC;
atomic_set_bit(&smp->allowed_cmds, BT_SMP_CMD_PAIRING_RSP);
atomic_set_bit(smp->flags, SMP_FLAG_PAIRING);
atomic_set_bit(smp->flags, SMP_FLAG_BR_INITIATOR);
return 0;
}
static bool br_sc_supported(void)
{
#if defined(CONFIG_BLUETOOTH_SMP_FORCE_BREDR)
@ -2200,6 +2253,12 @@ int bt_smp_send_pairing_req(struct bt_conn *conn)
return -EBUSY;
}
#if defined(CONFIG_BLUETOOTH_BREDR)
if (conn->type == BT_CONN_TYPE_BR) {
return smp_br_send_pairing_req(smp);
}
#endif
/* early verify if required sec level if reachable */
if (!sec_level_reachable(conn)) {
return -EINVAL;