From 98a3c74e3b6bfc0d2af0bf2456ede4f4fc26cd35 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=A4rkl?= <info@florianmaerkl.de>
Date: Wed, 12 Jun 2019 18:41:32 +0200
Subject: [PATCH] Begin Discovery

---
 lib/CMakeLists.txt             |  6 ++--
 lib/include/chiaki/discovery.h | 53 ++++++++++++++++++++++++++++++++++
 lib/src/discovery.c            | 42 +++++++++++++++++++++++++++
 3 files changed, 99 insertions(+), 2 deletions(-)
 create mode 100644 lib/include/chiaki/discovery.h
 create mode 100644 lib/src/discovery.c

diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 9dcc0f1..c256b0e 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -21,7 +21,8 @@ set(HEADER_FILES
 		include/chiaki/video.h
 		include/chiaki/videoreceiver.h
 		include/chiaki/frameprocessor.h
-		include/chiaki/seqnum.h)
+		include/chiaki/seqnum.h
+		include/chiaki/discovery.h)
 
 set(SOURCE_FILES
 		src/common.c
@@ -45,7 +46,8 @@ set(SOURCE_FILES
 		src/audio.c
 		src/audioreceiver.c
 		src/videoreceiver.c
-		src/frameprocessor.c)
+		src/frameprocessor.c
+		src/discovery.c)
 
 add_subdirectory(protobuf)
 include_directories("${NANOPB_SOURCE_DIR}")
diff --git a/lib/include/chiaki/discovery.h b/lib/include/chiaki/discovery.h
new file mode 100644
index 0000000..51835d7
--- /dev/null
+++ b/lib/include/chiaki/discovery.h
@@ -0,0 +1,53 @@
+/*
+ * This file is part of Chiaki.
+ *
+ * Chiaki is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chiaki is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chiaki.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef CHIAKI_DISCOVERY_H
+#define CHIAKI_DISCOVERY_H
+
+#include "common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CHIAKI_DISCOVERY_PORT 987
+#define CHIAKI_DISCOVERY_PROTOCOL_VERSION "00020020"
+
+typedef enum chiaki_discovery_cmd_t
+{
+	CHIAKI_DISCOVERY_CMD_SRCH
+} ChiakiDiscoveryCmd;
+
+typedef struct chiaki_discovery_packet_t
+{
+	ChiakiDiscoveryCmd cmd;
+	char *protocol_version;
+} ChiakiDiscoveryPacket;
+
+typedef struct chiaki_discovery_t
+{
+	int socket;
+} ChiakiDiscovery;
+
+CHIAKI_EXPORT ChiakiErrorCode chiaki_discovery_init(ChiakiDiscovery *discovery);
+CHIAKI_EXPORT void chiaki_discovery_fini(ChiakiDiscovery *discovery);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // CHIAKI_VIDEORECEIVER_H
diff --git a/lib/src/discovery.c b/lib/src/discovery.c
new file mode 100644
index 0000000..09d7479
--- /dev/null
+++ b/lib/src/discovery.c
@@ -0,0 +1,42 @@
+/*
+ * This file is part of Chiaki.
+ *
+ * Chiaki is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chiaki is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chiaki.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <chiaki/discovery.h>
+
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+
+static const char *packet_srch_template =
+		"SRCH * HTTP/1.1\n"
+  		"device-discovery-protocol-version:%s\n";
+
+
+CHIAKI_EXPORT ChiakiErrorCode chiaki_discovery_init(ChiakiDiscovery *discovery)
+{
+	discovery->socket = socket(AF_INET, SOCK_DGRAM, 0);
+	if(discovery->socket < 0)
+		return CHIAKI_ERR_UNKNOWN;
+	return CHIAKI_ERR_SUCCESS;
+}
+
+CHIAKI_EXPORT void chiaki_discovery_fini(ChiakiDiscovery *discovery)
+{
+	close(discovery->socket);
+}
\ No newline at end of file