bluez5: advertise hostname in BLE ad payload to have a recognizable name in AsteroidOSSync

recipes-connectivity/bluez5/bluez5/advertise-name.patch

+From: Florent Revest <revestflo@gmail.com>
+Date: Thu, 24 Nov 2016 17:39:00 +0200
+Subject: [PATCH] Forces GLES2 the dirty way
+
+---
+--- a/src/shared/ad.c
++++ b/src/shared/ad.c
+@@ -110,6 +110,18 @@
+ 	free(ad);
+ }
+ 
++static size_t local_name_length()
++{
++	size_t length = 0;
++	char hostname[1024];
++
++	length += 2; /* one byte for length and one byte for 0x09 */
++	gethostname(hostname, 1024);
++	length += strlen(&hostname);
++
++	return length;
++}
++
+ static size_t uuid_list_length(struct queue *uuid_queue)
+ {
+ 	bool uuid16_included = false;
+@@ -187,6 +199,8 @@
+ {
+ 	size_t length = 0;
+ 
++	length += local_name_length();
++
+ 	length += uuid_list_length(ad->service_uuids);
+ 
+ 	length += uuid_list_length(ad->solicit_uuids);
+@@ -198,6 +212,22 @@
+ 	return length;
+ }
+ 
++
++static void serialize_local_name(uint8_t *buf, uint8_t *pos)
++{
++	char hostname[1024];
++	uint8_t hostname_len;
++
++	gethostname(hostname, 1024);
++	hostname_len = strlen(&hostname);
++
++	buf[(*pos)++] = hostname_len + 1;
++	buf[(*pos)++] = EIR_NAME_COMPLETE;
++
++	memcpy(buf + *pos, &hostname, hostname_len);
++	*pos += hostname_len;
++}
++
+ static void serialize_uuids(struct queue *uuids, uint8_t uuid_type,
+ 						uint8_t ad_type, uint8_t *buf,
+ 						uint8_t *pos)
+@@ -330,6 +360,8 @@
+ 	if (!adv_data)
+ 		return NULL;
+ 
++	serialize_local_name(adv_data, &pos);
++
+ 	serialize_service_uuids(ad->service_uuids, adv_data, &pos);
+ 
+ 	serialize_solicit_uuids(ad->solicit_uuids, adv_data, &pos);

recipes-connectivity/bluez5/bluez5_%.bbappend

 FILESEXTRAPATHS_prepend := "${THISDIR}/bluez5:"
 SRC_URI += "file://main.conf \
             file://bluetooth.service \
-            file://bluetooth.conf"
+            file://bluetooth.conf \
+            file://advertise-name.patch"
 
 do_install_append() {
     install -d ${D}/etc/bluetooth/