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Bluetooth: SMP: Support Pairing Response over BR/EDR

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Handle Pairing Response and distribute keys if required.

Jira: ZEP-605

Change-Id: I2014d38896f9f67095228cb09dab017040570448
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>
This commit is contained in:
Szymon Janc 2016-09-08 12:18:31 +02:00 • committed by Johan Hedberg
commit 756ac5f63c
1 changed files with 54 additions and 2 deletions
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56
net/bluetooth/smp.c
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@ -883,8 +883,60 @@ static uint8_t smp_br_pairing_req(struct bt_smp *smp, struct net_buf *buf)
static uint8_t smp_br_pairing_rsp(struct bt_smp *smp, struct net_buf *buf)
{
/* TODO */
return BT_SMP_ERR_CMD_NOTSUPP;
struct bt_smp_pairing *rsp = (void *)buf->data;
struct bt_conn *conn = smp->chan.chan.conn;
uint8_t max_key_size;
BT_DBG("");
max_key_size = bt_conn_enc_key_size(conn);
if (!max_key_size) {
return BT_SMP_ERR_UNSPECIFIED;
}
if (rsp->max_key_size != max_key_size) {
return BT_SMP_ERR_ENC_KEY_SIZE;
}
/* Store Pairing Rsp for later use */
smp->prsp[0] = BT_SMP_CMD_PAIRING_RSP;
memcpy(smp->prsp + 1, rsp, sizeof(*rsp));
smp->local_dist &= rsp->init_key_dist;
smp->remote_dist &= rsp->resp_key_dist;
smp->local_dist &= SEND_KEYS_SC;
smp->remote_dist &= RECV_KEYS_SC;
/* slave distributes its keys first */
if (smp->remote_dist & BT_SMP_DIST_ID_KEY) {
atomic_set_bit(&smp->allowed_cmds, BT_SMP_CMD_IDENT_INFO);
} else if (smp->remote_dist & BT_SMP_DIST_SIGN) {
atomic_set_bit(&smp->allowed_cmds, BT_SMP_CMD_SIGNING_INFO);
}
/* derive LTK if requested and clear distribution bits */
if ((smp->local_dist & BT_SMP_DIST_ENC_KEY) &&
(smp->remote_dist & BT_SMP_DIST_ENC_KEY)) {
smp_br_derive_ltk(smp);
}
smp->local_dist &= ~BT_SMP_DIST_ENC_KEY;
smp->remote_dist &= ~BT_SMP_DIST_ENC_KEY;
/* Pairing acceptor distributes it's keys first */
if (smp->remote_dist) {
return 0;
}
smp_br_distribute_keys(smp);
/* if all keys were distributed, pairing is done */
if (!smp->local_dist && !smp->remote_dist) {
/* TODO pairing complete */
}
return 0;
}
static uint8_t smp_br_pairing_failed(struct bt_smp *smp, struct net_buf *buf)