usr/src/cmd/dtrace/test/tst/common/ip/tst.ipv4localudp.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:::{send,receive} of IPv4 UDP to a local address.
  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. No physical network interface is plumbed and up.
  35 # 3. No other hosts on this subnet are reachable and listening on rpcbind.
  36 # 4. An unlikely race causes the unlocked global send/receive
  37 #    variables to be corrupted.
  38 #
  39 # This test sends a UDP message using ping and checks that at least the
  40 # following counts were traced:
  41 #
  42 # 1 x ip:::send (UDP sent to ping's base UDP port)
  43 # 1 x udp:::send (UDP sent to ping's base UDP port)
  44 # 1 x ip:::receive (UDP received)
  45 #
  46 # No udp:::receive event is expected as the response ping -U elicits is
  47 # an ICMP PORT_UNREACHABLE response rather than a UDP packet, and locally
  48 # the echo request UDP packet only reaches IP, so the udp:::receive probe
  49 # is not triggered by it.
  50 #
  51
  52 if (( $# != 1 )); then
  53         print -u2 "expected one argument: <dtrace-path>"
  54         exit 2
  55 fi
  56
  57 dtrace=$1
  58 local=127.0.0.1
  59
  60 $dtrace -c "/usr/sbin/ping -U $local" -qs /dev/stdin <<EOF | grep -v 'is alive'
  61 BEGIN
  62 {
  63         ipsend = udpsend = ipreceive = 0;
  64 }
  65
  66 ip:::send
  67 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local" &&
  68     args[4]->ipv4_protocol == IPPROTO_UDP/
  69 {
  70         ipsend++;
  71 }
  72
  73 udp:::send
  74 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local"/
  75 {
  76         udpsend++;
  77 }
  78
  79 ip:::receive
  80 /args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local" &&
  81     args[4]->ipv4_protocol == IPPROTO_UDP/
  82 {
  83         ipreceive++;
  84 }
  85
  86 END
  87 {
  88         printf("Minimum UDP events seen\n\n");
  89         printf("ip:::send - %s\n", ipsend >= 1 ? "yes" : "no");
  90         printf("ip:::receive - %s\n", ipreceive >= 1 ? "yes" : "no");
  91         printf("udp:::send - %s\n", udpsend >= 1 ? "yes" : "no");
  92 }
  93 EOF