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      1 #!/usr/sbin/dtrace -s
      2 /*
      3  * tcpstat.d - print TCP statistics. Uses DTrace.
      4  *
      5  * This prints TCP statistics every second, retrieved from the MIB provider.
      6  *
      7  * $Id: tcpstat.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
      8  *
      9  * USAGE:	tcpstat.d
     10  *
     11  * FIELDS:
     12  *		TCP_out		TCP bytes sent
     13  *		TCP_outRe	TCP bytes retransmitted
     14  *		TCP_in		TCP bytes received
     15  *		TCP_inDup	TCP bytes received duplicated
     16  *		TCP_inUn	TCP bytes received out of order
     17  *
     18  * The above TCP statistics are documented in the mib2_tcp struct
     19  * in the /usr/include/inet/mib2.h file; and also in the mib provider
     20  * chapter of the DTrace Guide, http://docs.sun.com/db/doc/817-6223.
     21  *
     22  * COPYRIGHT: Copyright (c) 2005 Brendan Gregg.
     23  *
     24  * CDDL HEADER START
     25  *
     26  *  The contents of this file are subject to the terms of the
     27  *  Common Development and Distribution License, Version 1.0 only
     28  *  (the "License").  You may not use this file except in compliance
     29  *  with the License.
     30  *
     31  *  You can obtain a copy of the license at Docs/cddl1.txt
     32  *  or http://www.opensolaris.org/os/licensing.
     33  *  See the License for the specific language governing permissions
     34  *  and limitations under the License.
     35  *
     36  * CDDL HEADER END
     37  *
     38  * 15-May-2005  Brendan Gregg   Created this.
     39  * 15-May-2005	   "      "	Last update.
     40  */
     41 
     42 #pragma D option quiet
     43 
     44 /*
     45  * Declare Globals
     46  */
     47 dtrace:::BEGIN
     48 {
     49 	TCP_out = 0; TCP_outRe = 0;
     50 	TCP_in = 0; TCP_inDup = 0; TCP_inUn = 0;
     51 	LINES = 20; line = 0;
     52 }
     53 
     54 /*
     55  * Print Header
     56  */
     57 profile:::tick-1sec { line--; }
     58 
     59 profile:::tick-1sec
     60 /line <= 0 /
     61 {
     62 	printf("%11s %11s %11s %11s %11s\n",
     63 	    "TCP_out", "TCP_outRe", "TCP_in", "TCP_inDup", "TCP_inUn");
     64 
     65 	line = LINES;
     66 }
     67 
     68 /*
     69  * Save Data
     70  */
     71 mib:::tcpOutDataBytes		{ TCP_out += arg0;   }
     72 mib:::tcpRetransBytes		{ TCP_outRe += arg0; }
     73 mib:::tcpInDataInorderBytes	{ TCP_in += arg0;    }
     74 mib:::tcpInDataDupBytes		{ TCP_inDup += arg0; }
     75 mib:::tcpInDataUnorderBytes	{ TCP_inUn += arg0;  }
     76 
     77 /*
     78  * Print Output
     79  */
     80 profile:::tick-1sec
     81 {
     82 	printf("%11d %11d %11d %11d %11d\n",
     83 	    TCP_out, TCP_outRe, TCP_in, TCP_inDup, TCP_inUn);
     84 
     85 	/* clear values */
     86 	TCP_out   = 0;
     87 	TCP_outRe = 0;
     88 	TCP_in    = 0;
     89 	TCP_inDup = 0;
     90 	TCP_inUn  = 0;
     91 }
     92