Add protocol module API library

CMakeLists.txt

@@ -2,3 +2,4 @@ cmake_minimum_required(VERSION 2.8.3)
 project(GMRF C)
 
 add_subdirectory(mmss)
+add_subdirectory(mmss-protocol)

include/gmrf/gmrf.h

@@ -59,7 +59,11 @@ size_t gmrf_iface_get_mtu(gmrf_t *gmrf, gmrf_iface_t *iface);
 bool gmrf_iface_send(gmrf_t *gmrf, gmrf_iface_t *iface, const void *data, size_t len, const gmrf_addr_t *dest);
 bool gmrf_iface_send_bc(gmrf_t *gmrf, gmrf_iface_t *iface, const void *data, size_t len);
 
-gmrf_context_t* gmrf_init(gmrf_t *gmrf);
+/* implemented by protocol */
-void gmrf_handle_packet(gmrf_t *gmrf, gmrf_context_t *ctx, gmrf_iface_t *iface, const gmrf_addr_t *source, const void *data, size_t len);
+extern const char *gmrf_protocol_name;
+extern const char *gmrf_protocol_version;
+
+gmrf_context_t* gmrf_protocol_init(gmrf_t *gmrf);
+void gmrf_protocol_handle_packet(gmrf_t *gmrf, gmrf_context_t *ctx, gmrf_iface_t *iface, const gmrf_addr_t *source, const void *data, size_t len);
 
 #endif /* _GMRF_GMRF_H_ */

include/mmss/protocol.h

@@ -31,8 +31,8 @@
 
 
 typedef struct mmss_protocol {
-	const char *name;
+	const char* (*get_name)(void);
-	const char *version;
+	const char* (*get_version)(void);
 
 	gmrf_context_t* (*init)(gmrf_t *gmrf);
 	void (*handle_packet)(gmrf_t *gmrf, gmrf_context_t *ctx, gmrf_iface_t *iface, const gmrf_addr_t *source, const void *data, size_t len);

mmss-protocol/CMakeLists.txt

@@ -0,0 +1,6 @@
+include_directories(${GMRF_SOURCE_DIR}/include)
+
+add_library(mmss_protocol STATIC
+  mmss_protocol.c
+)
+set_target_properties(mmss_protocol PROPERTIES COMPILE_FLAGS "-fPIC")

mmss-protocol/mmss_protocol.c

@@ -0,0 +1,44 @@
+/*
+  Copyright (c) 2013, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include <mmss/protocol.h>
+
+
+static const char* get_name(void) {
+	return gmrf_protocol_name;
+}
+
+static const char* get_version(void) {
+	return gmrf_protocol_version;
+}
+
+const mmss_protocol_t mmss_protocol_info = {
+	.get_name = get_name,
+	.get_version = get_version,
+
+	.init = gmrf_protocol_init,
+	.handle_packet = gmrf_protocol_handle_packet,
+};

mmss/mmss.c

@@ -39,11 +39,20 @@ static void init_nodes(gmrf_t *nodes) {
 }
 
 
-int main() {
+int main(int argc, char *argv[]) {
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s protocol_module\n", argv[0]);
+		return 1;
+	}
+
+	const mmss_protocol_t *proto = mmss_load_protocol(argv[1]);
+	if (!proto)
+		return 1;
+
 	mmss_t mmss = { .now = 0 };
 
 	mmss_network_t net = { .mtu = 1500 };
-	gmrf_t node1 = { .mmss = &mmss }, node2 = { .mmss = &mmss };
+	gmrf_t node1 = { .mmss = &mmss, .proto = proto }, node2 = { .mmss = &mmss, .proto = proto };
 	gmrf_iface_t iface1 = {}, iface2 = {};
 
 	iface1.net = &net;

mmss/mmss.h

@@ -64,7 +64,7 @@ struct gmrf {
 	gmrf_context_t *ctx;
 	gmrf_iface_t *interfaces;
 
-	mmss_protocol_t *proto;
+	const mmss_protocol_t *proto;
 };
 
 struct gmrf_iface {