Bluetooth: Add read_version management command

This patch implements the initial read_version command that userspace
will use before any other management interface operations.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 36 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 7ea5489e7977..3e24c0bf18e7 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -29,6 +29,39 @@
 #include <net/bluetooth/hci_core.h>
 #include <net/bluetooth/mgmt.h>
 
+#define MGMT_VERSION    0
+#define MGMT_REVISION   1
+
+static int read_version(struct sock *sk)
+{
+        struct sk_buff *skb;
+        struct mgmt_hdr *hdr;
+        struct mgmt_ev_cmd_complete *ev;
+        struct mgmt_rp_read_version *rp;
+
+        BT_DBG("sock %p", sk);
+
+        skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
+        if (!skb)
+                return -ENOMEM;
+
+        hdr = (void *) skb_put(skb, sizeof(*hdr));
+        hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+        hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));
+
+        ev = (void *) skb_put(skb, sizeof(*ev));
+        put_unaligned_le16(MGMT_OP_READ_VERSION, &ev->opcode);
+
+        rp = (void *) skb_put(skb, sizeof(*rp));
+        rp->version = MGMT_VERSION;
+        put_unaligned_le16(MGMT_REVISION, &rp->revision);
+
+        if (sock_queue_rcv_skb(sk, skb) < 0)
+                kfree_skb(skb);
+
+        return 0;
+}
+
 static int cmd_status(struct sock *sk, u16 cmd, u8 status)
 {
         struct sk_buff *skb;
@@ -87,6 +120,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
         }
 
         switch (opcode) {
+        case MGMT_OP_READ_VERSION:
+                err = read_version(sk);
+                break;
         default:
                 BT_DBG("Unknown op %u", opcode);
                 err = cmd_status(sk, opcode, 0x01);