From: Anderson Briglia <anderson.briglia@xxxxxxxxxxxxx>
This implementation only exchanges SMP messages between the Host and the
Remote. No keys are being generated. TK and STK generation will be
provided in further patches.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxxxxxx>
---
net/bluetooth/l2cap_core.c | 3 +-
net/bluetooth/smp.c | 114 ++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 112 insertions(+), 5 deletions(-)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 674799c..da4f13d 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4630,7 +4630,8 @@ static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
break;
case L2CAP_CID_SMP:
- smp_sig_channel(conn, skb);
+ if (smp_sig_channel(conn, skb))
+ l2cap_conn_del(conn->hcon, 0x05);
break;
default:
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index e9dde5f..b25010f 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -64,6 +64,102 @@ static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data)
hci_send_acl(conn->hcon, skb, 0);
}
+static void smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ struct smp_cmd_pairing *rp = (void *) skb->data;
+
+ BT_DBG("");
+
+ skb_pull(skb, sizeof(struct smp_cmd_pairing));
+
+ rp->io_capability = 0x00;
+ rp->oob_flag = 0x00;
+ rp->max_key_size = 16;
+ rp->init_key_dist = 0x00;
+ rp->resp_key_dist = 0x00;
+ rp->auth_req &= 0x05;
+
+ smp_send_cmd(conn, SMP_CMD_PAIRING_RSP, sizeof(*rp), rp);
+}
+
+static void smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ struct smp_cmd_pairing_confirm cp;
+
+ BT_DBG("");
+
+ memset(&cp, 0, sizeof(struct smp_cmd_pairing_confirm));
+
+ smp_send_cmd(conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cp), &cp);
+}
+
+static void smp_cmd_pairing_confirm(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ BT_DBG("");
+
+ if (conn->hcon->out) {
+ struct smp_cmd_pairing_random random;
+
+ BT_DBG("master");
+
+ memset(&random, 0, sizeof(struct smp_cmd_pairing_random));
+
+ smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(random),
+ &random);
+ } else {
+ struct smp_cmd_pairing_confirm confirm;
+
+ BT_DBG("slave");
+
+ memset(&confirm, 0, sizeof(struct smp_cmd_pairing_confirm));
+
+ smp_send_cmd(conn, SMP_CMD_PAIRING_CONFIRM, sizeof(confirm),
+ &confirm);
+ }
+}
+
+static void smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ struct smp_cmd_pairing_random cp;
+
+ BT_DBG("");
+
+ skb_pull(skb, sizeof(struct smp_cmd_pairing_random));
+
+ /* FIXME: check if random matches */
+
+ if (conn->hcon->out) {
+ BT_DBG("master");
+ /* FIXME: start encryption */
+ } else {
+ BT_DBG("slave");
+
+ memset(&cp, 0, sizeof(struct smp_cmd_pairing_random));
+
+ smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(cp), &cp);
+ }
+}
+
+static void smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+ struct smp_cmd_security_req *rp = (void *) skb->data;
+ struct smp_cmd_pairing cp;
+
+ BT_DBG("");
+
+ skb_pull(skb, sizeof(struct smp_cmd_security_req));
+ memset(&cp, 0, sizeof(struct smp_cmd_pairing));
+
+ cp.io_capability = 0x00;
+ cp.oob_flag = 0x00;
+ cp.max_key_size = 16;
+ cp.init_key_dist = 0x00;
+ cp.resp_key_dist = 0x00;
+ cp.auth_req = rp->auth_req & 0x05;
+
+ smp_send_cmd(conn, SMP_CMD_PAIRING_REQ, sizeof(cp), &cp);
+}
+
int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level)
{
__u8 authreq;
@@ -114,23 +210,33 @@ int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
switch (code) {
case SMP_CMD_PAIRING_REQ:
- reason = SMP_PAIRING_NOTSUPP;
- smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, 1, &reason);
- err = -1;
+ smp_cmd_pairing_req(conn, skb);
break;
case SMP_CMD_PAIRING_FAIL:
break;
case SMP_CMD_PAIRING_RSP:
+ smp_cmd_pairing_rsp(conn, skb);
+ break;
+
+ case SMP_CMD_SECURITY_REQ:
+ smp_cmd_security_req(conn, skb);
+ break;
+
case SMP_CMD_PAIRING_CONFIRM:
+ smp_cmd_pairing_confirm(conn, skb);
+ break;
+
case SMP_CMD_PAIRING_RANDOM:
+ smp_cmd_pairing_random(conn, skb);
+ break;
+
case SMP_CMD_ENCRYPT_INFO:
case SMP_CMD_MASTER_IDENT:
case SMP_CMD_IDENT_INFO:
case SMP_CMD_IDENT_ADDR_INFO:
case SMP_CMD_SIGN_INFO:
- case SMP_CMD_SECURITY_REQ:
default:
BT_DBG("Unknown command code 0x%2.2x", code);
--
1.7.3.2
--
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