Socket level statistics in Linux/Unix

Question

有没有一种方法可以以编程方式知道Linux / Unix中套接字发送或接收的原始字节总数？

Answer 1

try the following:

int l = 0;
ioctl(sock, FIONREAD, &l);
if (l > 0)
{
  l = read(sock, buffer, l);
}