stat mngmt added

src/gateway.c

@@ -161,11 +161,31 @@ int main (int argc, char **argv) {
 					);
 					//printf("%s\n", buf);
 					res = PQexec(conn, buf);
-					if (PQresultStatus(res) != PGRES_COMMAND_OK) {
+					if (PQresultStatus(res) == PGRES_COMMAND_OK) {
+						PQclear(res);
 						fprintf(stderr, "%s\n", PQerrorMessage(conn));
+
+						sprintf(buf, "SELECT * FROM pend_msgs WHERE dev_id = %d", dev_id);
+						res = PQexec(conn, buf);
+						if (PQresultStatus(res) == PGRES_TUPLES_OK && PQntuples(res)) {
+							buf[2] = GATEWAY_PROTOCOL_STAT_ACK_PEND;
+							printf("ACK_PEND prepared\n");
+						} else {
+							buf[2] = GATEWAY_PROTOCOL_STAT_ACK;
+							printf("ACK prepared\n");
+						}
+
+						buf[0] = dev_id;				
+						buf[1] = GATEWAY_PROTOCOL_PACKET_TYPE_STAT;
+						buf_len = 3;
 					}
 					PQclear(res);
 				} else {
+					buf[0] = dev_id;				
+					buf[1] = GATEWAY_PROTOCOL_PACKET_TYPE_STAT;
+					buf[2] = GATEWAY_PROTOCOL_STAT_NACK;
+					buf_len = 3;
+
 					printf("payload decode error\n");
 				}
 			} else if (packet_type == GATEWAY_PROTOCOL_PACKET_TYPE_PEND_REQ) {