id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	field_blocks	field_dependson	field_seealso
442	First UDP datagram not received by netecho	Jakub Jermář		"As of [changeset:mainline,1474], running HelenOS in QEMU using the default ne-qe.sh script, doing the following:

{{{
/ # inetcfg create 10.0.2.15/24 net/eth2 v4a
/ # netecho -v -p 8080
}}}

and then from the host:

{{{
$ echo foo | nc -u 127.0.0.1 8080
}}}

will not do anything, i.e. `netecho` will not receive the first datagram and it will not echo 'foo' to its output. According to `top`, the system processes two interrupts from the NIC at this point. If the `nc` command from the host is retried, the datagram gets through and the NIC generates again two interrupts.

Note that if the gateway IP address 10.0.2.2 is pinged from HelenOS prior to issuing the `nc` command from the host, then the behavior is correct and `netecho` prints 'foo' to its output.

The problem is not reproducible e.g. in !VirtualBox when the guest networking is configured in bridged mode."	defect	closed	major	0.5.0	helenos/net/udp	mainline	notadefect