How to get creatior PID information for the local tcp connection

From	Vishnu Pratap Singh <vishu13285@gmail.com>
Newsgroups	linux.kernel
Subject	How to get creatior PID information for the local tcp connection
Date	2016-04-07 19:40 +0200
Message-ID	<rlm4p-7rS-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi,


Issue -  How to get PID information for the local tcp connection



i want to get the creator PID for each socket in user space for local
tcp connection, i see in kernel there is support for returing PID with
"SO_PEERCRED" ioctl to work across namespaces. it uses struct pid and
struct cred to store the peer credentials on struct sock.
cred_to_ucred(sk->sk_peer_pid, sk->sk_peer_cred, &peercred); Above
function stores the PID information in ucred->pid = pid_vnr(pid); and
same is returned via "SO_PEERCRED" ioctl .

But for local tcp connection i get pid as 0, is there any way i can
get the PID information. Any help or suggestion will be highly
helpful.



BR,

Vishnu<div id="DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br />
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How to get creatior PID information for the local tcp connection Vishnu Pratap Singh <vishu13285@gmail.com> - 2016-04-07 19:40 +0200
  Re: How to get creatior PID information for the local tcp connection Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-07 20:30 +0200
    Re: How to get creatior PID information for the local tcp connection Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-07 20:40 +0200

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