global packets, addr_errors, family_errors
global localhost

probe tcp.receive
{
	if (sport != 8079 && dport != 8079) {
		next
	}

	# We got a packet with either a source or destination port of 8079.
	packets <<< 1

	# Did the IP address get converted correctly?
	if (family == AF_INET() || family == AF_INET6()) {
		if (sport == 8079 && saddr != localhost[family]) {
			addr_errors <<< 1
			printf("error: saddr %s isn't %s\n", saddr,
			       localhost[family])
		}
		else if (dport == 8079 && daddr != localhost[family]) {
			addr_errors <<< 1
			printf("error: daddr %s isn't %s\n", daddr,
			       localhost[family])
		}
	}
	else {
		family_errors <<< 1
	}
}

probe begin {
	printf("systemtap starting probe\n")
	localhost[AF_INET()] = "127.0.0.1"
	localhost[AF_INET6()] = "0000:0000:0000:0000:0000:0000:0000:0001"
}
probe end {
	printf("systemtap ending probe\n")
	if (@count(packets) > 0) {
		printf("packets = %d\n", @count(packets))
	}
	else {
		printf("no packets seen\n")
	}
	printf("address errors = %d\n", @count(addr_errors))
	printf("bad family errors = %d\n", @count(family_errors))
}
