From 31ab43d8a0691e773db6992fa3b52ca24f7f8db4 Mon Sep 17 00:00:00 2001
From: Niklas Hofmann <niklas.hofmann@everbase.net>
Date: Wed, 13 Aug 2014 19:50:29 +0200
Subject: [PATCH] json export of node and edge structure

---
 examples/manynodes.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/Makefile.am      |  3 ++-
 src/meshlink.h       |  2 ++
 src/node.h           |  3 +--
 4 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/examples/manynodes.c b/examples/manynodes.c
index 2e26739c..3b617e4e 100644
--- a/examples/manynodes.c
+++ b/examples/manynodes.c
@@ -7,6 +7,11 @@
 #include <linux/limits.h>
 
 #include "../src/meshlink.h"
+#include "../src/devtools.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
 
 static int n = 10;
 static meshlink_handle_t **mesh;
@@ -62,6 +67,40 @@ static void linkmesh() {
 	}
 }
 
+static bool exportmeshgraph(const char* path)
+{
+	struct stat ps;
+	int psr = stat(path, &ps);
+
+	if(psr == 0 || errno != ENOENT)
+	{
+		if(psr == -1)
+			{ perror("stat"); }
+		else
+			{ fprintf(stderr, "%s exists already\n", path); }
+
+		return false;
+	}
+
+	FILE* stream = fopen(path, "w");
+
+	if(!stream)
+	{
+		perror("stream");
+		return false;
+	}
+
+	if(!devtool_export_json_all_edges_state(mesh[0], stream))
+	{
+		fclose(stream);
+		fprintf(stderr, "could not export graph\n");
+		return false;
+	}
+
+	fclose(stream);
+	return true;
+}
+
 static void parse_command(char *buf) {
 	char *arg = strchr(buf, ' ');
 	if(arg)
@@ -131,6 +170,8 @@ static void parse_command(char *buf) {
 		}
 	} else if(!strcasecmp(buf, "link")) {
 		linkmesh();
+	} else if(!strcasecmp(buf, "eg")) {
+		exportmeshgraph(arg);
 	} else if(!strcasecmp(buf, "test")) {
 		testmesh();
 	} else if(!strcasecmp(buf, "quit")) {
@@ -145,6 +186,7 @@ static void parse_command(char *buf) {
 			"/kick <name>          Blacklist the given node.\n"
 			"/who [<name>]         List all nodes or show information about the given node.\n"
 			"/link                 Link all nodes together.\n"
+			"/eg <path>            Export graph as json file.\n"
 			"/test                 Test functionality sending some data to all nodes\n"
 			"/quit                 Exit this program.\n"
 			);
diff --git a/src/Makefile.am b/src/Makefile.am
index 0c681acb..cae2ab95 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -56,7 +56,7 @@ sptps_speed_SOURCES = \
 
 lib_LTLIBRARIES = libmeshlink.la
 
-libmeshlink_la_LDFLAGS = -export-symbols-regex '^meshlink_'
+libmeshlink_la_LDFLAGS = -export-symbols-regex '^(meshlink_|devtool_)'
 
 libmeshlink_la_SOURCES = \
 	meshlink.c meshlink.h \
@@ -99,6 +99,7 @@ libmeshlink_la_SOURCES = \
 	system.h \
 	utils.c utils.h \
 	xalloc.h \
+	devtools.c devtools.h \
 	$(ed25519_SOURCES) \
 	$(chacha_poly1305_SOURCES)
 
diff --git a/src/meshlink.h b/src/meshlink.h
index 16603f47..3d929073 100644
--- a/src/meshlink.h
+++ b/src/meshlink.h
@@ -96,6 +96,8 @@ struct meshlink_handle {
 
 struct meshlink_node {
 	char *name;       ///< Textual name of this node. It is stored in a nul-terminated C string, which is allocated by MeshLink.
+	uint32_t options;
+	dev_class_t devclass;
 	void *priv;       ///< Private pointer which may be set freely by the application, and is never used or modified by MeshLink.
 };
 
diff --git a/src/node.h b/src/node.h
index b669b5da..c86c3cee 100644
--- a/src/node.h
+++ b/src/node.h
@@ -40,10 +40,9 @@ typedef struct node_status_t {
 
 typedef struct node_t {
 	char *name;                             /* name of this node */
-	void *priv;
-	
 	uint32_t options;                       /* options turned on for this node */
 	dev_class_t devclass;
+	void *priv;
 
 	struct meshlink_handle *mesh;           /* The mesh this node belongs to */
 
-- 
2.39.5