tst.ipv4localudp.ksh revision 9cd928fe5e3ea4e05f64cfb380beb54b2623e7dc
#
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#
#
#
#
# Test ip:::{send,receive} of IPv4 UDP to a local address.
#
# This may fail due to:
#
# 1. A change to the ip stack breaking expected probe behavior,
# which is the reason we are testing.
# 2. No physical network interface is plumbed and up.
# 3. No other hosts on this subnet are reachable and listening on rpcbind.
# variables to be corrupted.
#
# This test sends a UDP message using ping and checks that at least the
# following counts were traced:
#
# 1 x ip:::send (UDP sent to ping's base UDP port)
# 1 x udp:::send (UDP sent to ping's base UDP port)
# 1 x ip:::receive (UDP received)
#
# No udp:::receive event is expected as the response ping -U elicits is
# an ICMP PORT_UNREACHABLE response rather than a UDP packet, and locally
# the echo request UDP packet only reaches IP, so the udp:::receive probe
# is not triggered by it.
#
if (( $# != 1 )); then
print -u2 "expected one argument: <dtrace-path>"
exit 2
fi
dtrace=$1
local=127.0.0.1
BEGIN
{
ipsend = udpsend = ipreceive = 0;
}
ip:::send
/args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local" &&
args[4]->ipv4_protocol == IPPROTO_UDP/
{
ipsend++;
}
udp:::send
/args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local"/
{
udpsend++;
}
ip:::receive
/args[2]->ip_saddr == "$local" && args[2]->ip_daddr == "$local" &&
args[4]->ipv4_protocol == IPPROTO_UDP/
{
ipreceive++;
}
END
{
printf("Minimum UDP events seen\n\n");
printf("ip:::send - %s\n", ipsend >= 1 ? "yes" : "no");
printf("ip:::receive - %s\n", ipreceive >= 1 ? "yes" : "no");
printf("udp:::send - %s\n", udpsend >= 1 ? "yes" : "no");
}
EOF