X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fprotocol.c;h=1153d61fed56017f9ca07638cb869012b5959d7b;hb=bb6b97ce3493d49b79f1bd57fdac420c312ef8d6;hp=1c5b6cfd9c1d43dba0c6a2e21defabdb4c431209;hpb=268c8545aaf83b7433f43402f5c77e39e20006ef;p=tinc

diff --git a/src/protocol.c b/src/protocol.c
index 1c5b6cfd..1153d61f 100644
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -56,6 +56,9 @@ static char (*request_name[]) = {
 static splay_tree_t *past_request_tree;
 
 bool check_id(const char *id) {
+	if(!id || !*id)
+		return false;
+
 	for(; *id; id++)
 		if(!isalnum(*id) && *id != '_')
 			return false;