tinc devel - Nov 2018 - Fix issue with graphviz file format

Hello,

Here's a quick patch to secure node names in generated graphviz
network maps.

Thanks for tinc!

This is needed for all nodes with a name starting with a digit,
otherwise the ID would be interpreted as a numeral.
---
 src/graph.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/graph.c b/src/graph.c
index 3529d011..c63fdf9c 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -360,13 +360,13 @@ void dump_graph(void) {
 	/* dump all nodes first */
 	for(node = node_tree->head; node; node = node->next) {
 		n = node->data;
-		fprintf(file, "	%s [label = \"%s\"];\n", n->name,
n->name);
+		fprintf(file, "	\"%s\" [label = \"%s\"];\n",
n->name, n->name);
 	}
 
 	/* now dump all edges */
 	for(node = edge_weight_tree->head; node; node = node->next) {
 		e = node->data;
-		fprintf(file, "	%s -> %s;\n", e->from->name,
e->to->name);
+		fprintf(file, "	\"%s\" -> \"%s\";\n",
e->from->name, e->to->name);
 	}
 
 	fprintf(file, "}\n");
-- 
2.16.4