Bluetooth: A2MP: Build and Send msg helpers (f6d3c6e7) · Commits · 戴 / test

include/net/bluetooth/a2mp.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,13 @@ 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);

+46 −0

Original line number	Diff line number	Diff line
		@@ -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",
		};