mgmt: Implement adapter name control

This patch adds a new set_local_name command as well as a
local_name_changed event to the management interface. Instead of 248
bytes (like in the HCI spec) 249 bytes are always reserved for the name
in the messages so that there's a guarantee of it being nul-terminated
(this is not guaranteed on the HCI level).

TODO

@@ -226,11 +226,6 @@ Management Interface
   Priority: High
   Complexity: C3
 
-- Local name setting. mgmt_set_local_name & mgmt_local_name_changed
-
-  Priority: High
-  Complexity: C1
-
 - EIR generation support
 
   Priority: High

doc/mgmt-api.txt

@@ -266,6 +266,13 @@ User Confirmation Negative Reply Command
 	Return Paramters:	Address (6 Octets)
 				Status (1 Octet)
 
+Set Local Name Command
+======================
+
+	Command Code:		0x0017
+	Controller Index:	<controller id>
+	Command Parameters:	Name (249 Octets)
+	Return Paramters:	Name (249 Octets)
 
 Read Tracing Buffer Size Command
 ================================
@@ -448,3 +455,10 @@ Event Code		0x0010
 Controller Index:	<controller id>
 Event Parameters	Address (6 Octets)
 			Status (1 Octet)
+
+Local Name Changed Event
+========================
+
+Event Code		0x0011
+Controller Index	<controller id>
+Event Parameters	Name (249 Octets)

lib/mgmt.h

@@ -174,6 +174,11 @@ struct mgmt_rp_user_confirm_reply {
 
 #define MGMT_OP_USER_CONFIRM_NEG_REPLY	0x0016
 
+#define MGMT_OP_SET_LOCAL_NAME		0x0017
+struct mgmt_cp_set_local_name {
+	uint8_t name[249];
+} __packed;
+
 #define MGMT_EV_CMD_COMPLETE		0x0001
 struct mgmt_ev_cmd_complete {
 	uint16_t opcode;
@@ -241,3 +246,8 @@ struct mgmt_ev_auth_failed {
 	bdaddr_t bdaddr;
 	uint8_t status;
 } __packed;
+
+#define MGMT_EV_LOCAL_NAME_CHANGED	0x0011
+struct mgmt_ev_local_name_changed {
+	uint8_t name[249];
+} __packed;

plugins/mgmtops.c

@@ -999,6 +999,36 @@ static void get_connections_complete(int sk, uint16_t index, void *buf,
 	read_info(sk, index);
 }
 
+static void set_local_name_complete(int sk, uint16_t index, void *buf,
+								size_t len)
+{
+	struct mgmt_cp_set_local_name *rp = buf;
+	struct controller_info *info;
+	struct btd_adapter *adapter;
+
+	if (len < sizeof(*rp)) {
+		error("Too small pair_device complete event");
+		return;
+	}
+
+	DBG("hci%d name %s", index, (char *) rp->name);
+
+	if (index > max_index) {
+		error("Unexpected index %u in pair_device complete", index);
+		return;
+	}
+
+	info = &controllers[index];
+
+	adapter = manager_find_adapter(&info->bdaddr);
+	if (adapter == NULL) {
+		DBG("Adapter not found");
+		return;
+	}
+
+	adapter_update_local_name(adapter, (char *) rp->name);
+}
+
 static void mgmt_cmd_complete(int sk, uint16_t index, void *buf, size_t len)
 {
 	struct mgmt_ev_cmd_complete *ev = buf;
@@ -1080,6 +1110,9 @@ static void mgmt_cmd_complete(int sk, uint16_t index, void *buf, size_t len)
 	case MGMT_OP_USER_CONFIRM_NEG_REPLY:
 		DBG("user_confirm_net_reply complete");
 		break;
+	case MGMT_OP_SET_LOCAL_NAME:
+		set_local_name_complete(sk, index, ev->data, len);
+		break;
 	default:
 		error("Unknown command complete for opcode %u", opcode);
 		break;
@@ -1362,8 +1395,23 @@ static int mgmt_resolve_name(int index, bdaddr_t *bdaddr)
 
 static int mgmt_set_name(int index, const char *name)
 {
+	char buf[MGMT_HDR_SIZE + sizeof(struct mgmt_cp_set_local_name)];
+	struct mgmt_hdr *hdr = (void *) buf;
+	struct mgmt_cp_set_local_name *cp = (void *) &buf[sizeof(*hdr)];
+
 	DBG("index %d, name %s", index, name);
-	return -ENOSYS;
+
+	memset(buf, 0, sizeof(buf));
+	hdr->opcode = htobs(MGMT_OP_SET_LOCAL_NAME);
+	hdr->len = htobs(sizeof(*cp));
+	hdr->index = htobs(index);
+
+	strncpy((char *) cp->name, name, sizeof(cp->name) - 1);
+
+	if (write(mgmt_sock, buf, sizeof(buf)) < 0)
+		return -errno;
+
+	return 0;
 }
 
 static int mgmt_cancel_resolve_name(int index, bdaddr_t *bdaddr)