lend
uint64_t lstart = 0, lend = 0;
if (lstart <= addr && addr <= lend) {
size -= (lend - addr);
addr = lend;
lend = addr + size;
if (lend()) {
static int lend(void);
size_t lend = sizeof(tcp_debug);
if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, &lend,