Tag Archives: getsockopt

Linux kernel hacking – support SO_PEERCRED for local TCP socket connections

Posted on October 6, 2015 by daveti

In my old post (https://davejingtian.org/2015/02/17/retrieve-pid-from-the-packet-in-unix-domain-socket-a-complete-use-case-for-recvmsgsendmsg/), we talked about how to retrieve the peer PID from Unix domain socket using struct ucred. A more smart way to do this is using getsockopt() syscall with option SO_PEERCRED directly. As you expected (or … Continue reading →

Posted in Linux Distro, Network, OS | Tagged CentOS, getsockopt, iproute, iproute2, kernel, Linux, loopback, netstat, pid, selinux, skb, sock, socket, SO_PEERCRED, ss, TCP, tcp_diag, ucred | 6 Comments