usr/src/cmd/dtrace/test/tst/common/ip/tst.ipv4localtcp.ksh

   1 #!/usr/bin/ksh
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22
  23 #
  24 # Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  25 #
  26
  27 #
  28 # Test {ip,tcp}:::{send,receive} of IPv4 TCP to local host.
  29 #
  30 # This may fail due to:
  31 #
  32 # 1. A change to the ip stack breaking expected probe behavior,
  33 #    which is the reason we are testing.
  34 # 2. The lo0 interface missing or not up.
  35 # 3. The local ssh service is not online.
  36 # 4. An unlikely race causes the unlocked global send/receive
  37 #    variables to be corrupted.
  38 #
  39 # This test performs a TCP connection and checks that at least the
  40 # following packet counts were traced:
  41 #
  42 # 3 x ip:::send (2 during the TCP handshake, then a FIN)
  43 # 3 x tcp:::send (2 during the TCP handshake, then a FIN)
  44 # 2 x ip:::receive (1 during the TCP handshake, then the FIN ACK)
  45 # 2 x tcp:::receive (1 during the TCP handshake, then the FIN ACK)
  46
  47 # The actual count tested is 5 each way, since we are tracing both
  48 # source and destination events.
  49 #
  50 # For this test to work, we are assuming that the TCP handshake and
  51 # TCP close will enter the IP code path and not use tcp fusion.
  52 #
  53
  54 if (( $# != 1 )); then
  55         print -u2 "expected one argument: <dtrace-path>"
  56         exit 2
  57 fi
  58
  59 dtrace=$1
  60 local=127.0.0.1
  61 tcpport=22
  62 DIR=/var/tmp/dtest.$$
  63
  64 mkdir $DIR
  65 cd $DIR
  66
  67 cat > test.pl <<-EOPERL
  68         use IO::Socket;
  69         my \$s = IO::Socket::INET->new(
  70             Proto => "tcp",
  71             PeerAddr => "$local",
  72             PeerPort => $tcpport,
  73             Timeout => 3);
  74         die "Could not connect to host $local port $tcpport" unless \$s;
  75         close \$s;
  76 EOPERL
  77
  78 $dtrace -c 'perl test.pl' -qs /dev/stdin <<EODTRACE
  79 BEGIN
  80 {
  81         ipsend = tcpsend = ipreceive = tcpreceive = 0;
  82 }
  83
  84 ip:::send
  85 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local" &&
  86     args[4]->ipv4_protocol == IPPROTO_TCP/
  87 {
  88         ipsend++;
  89 }
  90
  91 tcp:::send
  92 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local"/
  93 {
  94         tcpsend++;
  95 }
  96
  97 ip:::receive
  98 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local" &&
  99     args[4]->ipv4_protocol == IPPROTO_TCP/
 100 {
 101         ipreceive++;
 102 }
 103
 104 tcp:::receive
 105 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local"/
 106 {
 107         tcpreceive++;
 108 }
 109
 110 END
 111 {
 112         printf("Minimum TCP events seen\n\n");
 113         printf("ip:::send - %s\n", ipsend >= 5 ? "yes" : "no");
 114         printf("ip:::receive - %s\n", ipreceive >= 5 ? "yes" : "no");
 115         printf("tcp:::send - %s\n", tcpsend >= 5 ? "yes" : "no");
 116         printf("tcp:::receive - %s\n", tcpreceive >= 5 ? "yes" : "no");
 117 }
 118 EODTRACE
 119
 120 status=$?
 121
 122 cd /
 123 /usr/bin/rm -rf $DIR
 124
 125 exit $status