From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
Helper function to build and send A2MP messages.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
---
include/net/bluetooth/a2mp.h | 7 ++++++
net/bluetooth/a2mp.c | 46 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/include/net/bluetooth/a2mp.h b/include/net/bluetooth/a2mp.h
index ee42c86..6c160d4 100644
--- a/include/net/bluetooth/a2mp.h
+++ b/include/net/bluetooth/a2mp.h
@@ -26,6 +26,13 @@ struct amp_mgr {
unsigned long flags;
};
+struct a2mp_cmd {
+ __u8 code;
+ __u8 ident;
+ __le16 len;
+ __u8 data[0];
+} __packed;
+
void amp_mgr_get(struct amp_mgr *mgr);
int amp_mgr_put(struct amp_mgr *mgr);
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index aa1fc95..3f69823 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -21,6 +21,52 @@ static struct amp_mgr *get_amp_mgr_sk(struct sock *sk);
LIST_HEAD(amp_mgr_list);
DEFINE_MUTEX(amp_mgr_list_lock);
+/* 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 inline int __a2mp_send(struct socket *sock, u8 *data, int len)
+{
+ struct kvec iv = { data, len };
+ struct msghdr msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ return kernel_sendmsg(sock, &msg, &iv, 1, len);
+}
+
+static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len,
+ void *data)
+{
+ struct a2mp_cmd *cmd;
+
+ if (!mgr->a2mp_sock)
+ return;
+
+ cmd = __a2mp_build(code, ident, len, data);
+ if (!cmd)
+ return;
+
+ __a2mp_send(mgr->a2mp_sock, (u8 *)cmd, len + sizeof(*cmd));
+ kfree(cmd);
+}
+
static void a2mp_data_ready(struct sock *sk, int bytes)
{
struct sk_buff *skb;
--
1.7.4.1
--
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