linux-kernel - How to get creatior PID information for the local tcp connection

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Date:	Thu, 7 Apr 2016 23:01:33 +0530
From:	Vishnu Pratap Singh <vishu13285@...il.com>
To:	dccp@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	"vishnu.ps@...sung.com" <vishnu.ps@...sung.com>
Subject: How to get creatior PID information for the local tcp connection

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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