Re: snmp over ipv6

[Anja B. <pra...@ia...>]

I'm working with SuSE 7.3 linux.
I've tested your patch, but it doesn't work for me.
I still get the error message (when starting snmpd):
    Error opening specified endpoint "udp6:161"

Regards
Anja Bornkamp


----- Original Message -----
From: Katsuhisa ABE <abe...@cy...>
To: Anja Bornkamp <pra...@ia...>
Cc: Wes Hardaker <har...@us...>; SNMP-Mailinglist
<Net...@li...>
Sent: Friday, June 21, 2002 11:04 AM
Subject: Re: snmp over ipv6


>   Dear Anja,
>
> At Fri, 21 Jun 2002 09:08:58 +0200,
> Anja Bornkamp wrote:
>
> > But when i pass "udp:161,udp6:161" to the demon and send an snmpwalk i
get a
> > Timeout.
> > But by using port 161 for udp and speciefying an other port for udp6
(like
> > udp6:1866) it works.
> > Is it all right that "udp:161,udp6:161" don't work?
>
>   I tested the following command on Linux (RedHat 7.1 +
USAGI-stable-3.1(*1))
>
>  # snmpd -D -L udp:161,udp6:161
>
> but failed with the following message.
>
> ------------------------------------------------------------------
> trace: netsnmp_sockaddr_in6(): snmpUDPIPv6Domain.c, 336
> netsnmp_sockaddr_in6: addr 0xbfffde40, peername "161"
> trace: netsnmp_sockaddr_in6(): snmpUDPIPv6Domain.c, 369
> netsnmp_sockaddr_in6: totally numeric: 161
> trace: netsnmp_sockaddr_in6(): snmpUDPIPv6Domain.c, 517
> netsnmp_sockaddr_in6: return { AF_INET6, [::]:161 }
> trace: snmp_udp6_fmtaddr(): snmpUDPIPv6Domain.c, 52
> snmp_udp6_fmtaddr: t = (nil), data = 0xbfffde40, len = 28
> trace: snmp_udp6_transport(): snmpUDPIPv6Domain.c, 197
> snmp_udp6: open local [::]:161
> trace: snmp_udp6_close(): snmpUDPIPv6Domain.c, 157
> snmp_udp6_close: close fd 9
> Error opening specified endpoint "udp6:161"
> Server Exiting with code 1
> ------------------------------------------------------------------
>
> I solve the above problem on USAGI-stable-3.1 by the following patch.
>
> Index: snmplib/snmpUDPIPv6Domain.c
> ===================================================================
> RCS file: /cvsroot/net-snmp/net-snmp/snmplib/snmpUDPIPv6Domain.c,v
> retrieving revision 5.4
> diff -u -r5.4 snmpUDPIPv6Domain.c
> --- snmplib/snmpUDPIPv6Domain.c 15 May 2002 12:37:37 -0000      5.4
> +++ snmplib/snmpUDPIPv6Domain.c 16 Jun 2002 13:18:21 -0000
> @@ -253,6 +253,16 @@
>           * INADDR_ANY, but certainly includes a port number.
>           */
>
> +#ifdef IPV6_V6ONLY
> +        /* Try to restrict PF_INET6 socket to IPv6 communications only.
*/
> +        {
> +         int one=1;
> +         if (setsockopt(t->sock, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&one,
sizeof(one)) != 0) {
> +           DEBUGMSGTL(("snmp_udp6", "couldn't set IPV6_V6ONLY to %d
bytes: %s\n", one, strerror(errno)));
> +         }
> +       }
> +#endif
> +
>          rc = bind(t->sock, (struct sockaddr *) addr,
>                    sizeof(struct sockaddr_in6));
>          if (rc != 0) {
>
>
> But I don't know that the above patch work on Linux 7.3 (RedHat 7.3?).
> If it work, I will send it to http://www.net-snmp.org/patches/.
>
> (*1)
> For further information about USAGI Project, please refer to
>   http://www.linux-ipv6.org/
>
> Regards,
> Katsuhisa ABE <abe...@cy...> or <abe...@cy...>
> Cyber Solutions Inc.