[LAC-TF] Configuring dhcp6s as a stateless server: transmit reply to fe80::dc93:49bf:da71:d1cd%bge1 failed

[Jorge M. Niedbalski R.]

2008/7/15 Roque Gagliano <roque at lacnic.net>:

> Hola,
> Mande esta pregunta al foro de los programadores del wide-dhcp6 pero no me
> contestaron, a ver si aquí alguien tiene experiencia en el tema y me puede
> dar una mano.
>
> gracias!
> Roque
>
> Begin forwarded message:
>
> *From: *Roque Gagliano <roque at lacnic.net>
> *Date: *July 14, 2008 10:54:22 AM GMT-03:00
> *To: *wide-dhcpv6-developers at lists.sourceforge.net
> *Subject: **configuring dhcp6s as a stateless server: transmit reply to
> fe80::dc93:49bf:da71:d1cd%bge1 failed*
>
> -----BEGIN PGP SIGNED MESSAGE-----
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>
> Hi,
>
> I am using a dhcp6s server in a FreeBSD environment just to provide DNS
> info to clients (I am using stateless autoconf with raflag 0x40). I can see
> the "DHCP Information Request" from the customers at the server (using
> tcpdump) and the service up using sockstat but the server is not responding
> them. I tried to debug but the only message that I get is:
>
> Jul 11 17:29:28 fwi dhcp6s[77211]: server6_send: transmit reply to
> fe80::dc93:49bf:da71:d1cd%bge1 failed
>
> My configuration file is:
>
> [root at fwi /usr/local/etc]# more /usr/local/etc/dhcp6s.conf
> # The followings are a sample configuration to provide a DNS server address
> # for every client as well as to delegate a permanent IPv6 prefix
> # 2001:db8:1111::/48 to a client whose DUID is 00:01:00:01:aa:bb.
>
> option domain-name-servers 2001:13c7:7001:4224::224;
> option domain-name-servers 2001:13c7:7001:4225::225;
> option domain-name "lacnic.net.uy";
> [root at fwi /usr/local/etc]#
>
> [root at fwi ~]# sockstat  -6
> USER     COMMAND    PID   FD PROTO  LOCAL ADDRESS         FOREIGN ADDRESS
> root     dhcp6s     88992 5  udp6   *:547                 *:*
> root     dhcp6s     88992 6  udp6   *:62256               *:*
> root     dhcp6s     88992 7  tcp6   ::1:5547              *:*
>
> Do you have any idea of what could be hapenning?
>
> thanks for your help,
> Roque
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>
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>
No utilizo wide-dhcpv6 , pero veamos si te puedo ayudar.

Donde se genera el error es en :

error = sendto(s, buf, len, 0, sa, sysdep_sa_len(sa)); /** file common.c **/

Segun el man sendto(2) , los errores que pueden ser retornados :

     [EHOSTUNREACH]     The remote host was unreachable.
     [EISCONN]  A destination address was specified and the socket is
already connected.
     [ECONNREFUSED]     The socket received an ICMP destination unreachable
                        message from the last message sent.  This typically
                        means that the receiver is not listening on the
remote
                        port.
     [EHOSTDOWN]        The remote host was down.
     [ENETDOWN]         The remote network was down.


Me inclino por que no puede alcanzar la red de origen del cliente que genera
el information request ¿ Puedes mostrarme un dump de un request DHCP desde
un cliente ?

-- 
Jorge Niedbalski R.
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