CFG_PORT_INNER
TEST_PACKET_LEN, sport, CFG_PORT_INNER,
#define TEST_IN4_DST_ADDR_DEFAULT INIT_ADDR4(INADDR_LOOPBACK, CFG_PORT_INNER)
snprintf(dst_port, sizeof(dst_port), "%d", CFG_PORT_INNER);
INIT_ADDR6(IN6ADDR_LOOPBACK_INIT, CFG_PORT_INNER)
#define TEST_IN4_DST_ADDR_IPIP INIT_ADDR4((in_addr_t)0xC0A80001, CFG_PORT_INNER)