1 files changed, 9 insertions, 0 deletions
diff --git a/main.c b/main.c
index a5e919e..f15d811 100644
--- a/main.c
+++ b/main.c
@@ -196,6 +196,7 @@ int main (int argc, char **argv) {
 	char buff[1500];
 	int plen = 0;
 	struct timeval timeout;
+	int keepalive_counter = 0;
 	fd_set read_fds;
 
 	if (argc < 4) {
@@ -343,6 +344,14 @@ int main (int argc, char **argv) {
 				memcpy(data + plen, &key, 1);
 				result = sendUDP(data, plen + 1);
 			}
+		} else {
+			/* keepalive */
+			if ((keepalive_counter++ % 10) == 0) {
+				char odata[22];
+				int plen=0,result=0;
+				plen = initPacket(odata, MT_PTYPE_ACK, srcmac, dstmac, sessionkey, 0);
+				result = sendUDP(odata, plen);
+			}
 		}
 	}
 	resetTerm();