HVS_PKT_LEN
HVS_PKT_LEN(HVS_SEND_BUF_SIZE));
return readable >= HVS_PKT_LEN(0);
if (readable > HVS_PKT_LEN(0)) {
if (readable == HVS_PKT_LEN(0)) {
if (writeable <= HVS_PKT_LEN(1) + HVS_PKT_LEN(0))
ret = writeable - HVS_PKT_LEN(1) - HVS_PKT_LEN(0);
#define HVS_MAX_PKT_SIZE HVS_PKT_LEN(HVS_MTU_SIZE)