Bluetooth: A2MP: Build and Send msg helpers

Helper function to build and send A2MP messages.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

1 files changed, 46 insertions, 0 deletions

diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 3c241c2b3e1a..53f49a0b7f9a 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -17,6 +17,52 @@
 #include <net/bluetooth/l2cap.h>
 #include <net/bluetooth/a2mp.h>
 
+/* A2MP build & send command helper functions */
+static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
+{
+        struct a2mp_cmd *cmd;
+        int plen;
+
+        plen = sizeof(*cmd) + len;
+        cmd = kzalloc(plen, GFP_KERNEL);
+        if (!cmd)
+                return NULL;
+
+        cmd->code = code;
+        cmd->ident = ident;
+        cmd->len = cpu_to_le16(len);
+
+        memcpy(cmd->data, data, len);
+
+        return cmd;
+}
+
+static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len,
+                      void *data)
+{
+        struct l2cap_chan *chan = mgr->a2mp_chan;
+        struct a2mp_cmd *cmd;
+        u16 total_len = len + sizeof(*cmd);
+        struct kvec iv;
+        struct msghdr msg;
+
+        cmd = __a2mp_build(code, ident, len, data);
+        if (!cmd)
+                return;
+
+        iv.iov_base = cmd;
+        iv.iov_len = total_len;
+
+        memset(&msg, 0, sizeof(msg));
+
+        msg.msg_iov = (struct iovec *) &iv;
+        msg.msg_iovlen = 1;
+
+        l2cap_chan_send(chan, &msg, total_len, 0);
+
+        kfree(cmd);
+}
+
 static struct l2cap_ops a2mp_chan_ops = {
         .name = "L2CAP A2MP channel",
 };