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#!/usr/sbin/dtrace -s
/*
* tcpsnoop - snoop TCP network packets by process.
* Written using DTrace tcp Provider.
*
* This analyses TCP network packets and prints the responsible PID plus
* standard details such as IP address and port. This captures traffic
* from existing and newly created TCP connections. It can help identify
* which processes are causing TCP traffic.
*
* SEE ALSO: snoop -rS
*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*
* Portions Copyright 2010 Brendan Gregg
*/
#pragma D option quiet
#pragma D option switchrate=10hz
dtrace:::BEGIN
{
printf("%6s %6s %15s:%-5s %15s:%-5s %6s %s\n",
"TIME", "PID", "LADDR", "PORT", "RADDR", "PORT", "BYTES", "FLAGS");
}
tcp:::send
{
this->length = args[2]->ip_plength - args[4]->tcp_offset;
printf("%6d %6d %15s:%-5d -> %15s:%-5d %6d (",
timestamp/1000, args[1]->cs_pid, args[2]->ip_saddr,
args[4]->tcp_sport, args[2]->ip_daddr, args[4]->tcp_dport,
this->length);
}
tcp:::receive
{
this->length = args[2]->ip_plength - args[4]->tcp_offset;
printf("%6d %6d %15s:%-5d <- %15s:%-5d %6d (",
timestamp/1000, args[1]->cs_pid, args[2]->ip_daddr,
args[4]->tcp_dport, args[2]->ip_saddr, args[4]->tcp_sport,
this->length);
}
tcp:::send,
tcp:::receive
{
printf("%s", args[4]->tcp_flags & TH_FIN ? "FIN|" : "");
printf("%s", args[4]->tcp_flags & TH_SYN ? "SYN|" : "");
printf("%s", args[4]->tcp_flags & TH_RST ? "RST|" : "");
printf("%s", args[4]->tcp_flags & TH_PUSH ? "PUSH|" : "");
printf("%s", args[4]->tcp_flags & TH_ACK ? "ACK|" : "");
printf("%s", args[4]->tcp_flags & TH_URG ? "URG|" : "");
printf("%s", args[4]->tcp_flags & TH_ECE ? "ECE|" : "");
printf("%s", args[4]->tcp_flags & TH_CWR ? "CWR|" : "");
printf("%s", args[4]->tcp_flags == 0 ? "null " : "");
printf("\b)\n");
}
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