Re: Setting the sender address in outgoing SNMP trap packets

Hi,

Thanks for your reply. When I try to set the
agent-addr using the code below, I get the following
error:
ERROR: Couldn't parse PDU type: Wrong type for that
item.
I use the following code to add the agent-addr:
cp = asn_build_string(cp, out_length,
(u_char) (ASN_IPADDRESS |
ASN_PRIMITIVE),
(u_char *) pdu->agent_addr, 4);

I do not see any errors when I do teh above.
Thanks.
/Shobana
--- Dave Shield <D.T.Shield@csc.liv.ac.uk> wrote:
> On Wed, 2005-04-13 at 18:59, Shobana Sampath wrote:
> > > > In the netsnmp_pdu data structure, what is the
> > > > field that I can use in snmp v2c to set the
> > > > sender's address in outgoing SNMP packets.
>
> Oops.
> I've just spotted that you're talking about SNMP
> *trap* packets, rather than more general requests.
>
> In this particular case, there _is_ a field for this
> value in the PDU structure - 'agent_addr'.
>
> The following code from 'apps/snmptrap.c' shows how
> it's set up in that tool:
>
> // line 259
> pdu_in_addr_t = (in_addr_t *) pdu->agent_addr;
>
> // lines 290-295
> agent = argv[arg];
> if (agent != NULL && strlen(agent) != 0) {
> *pdu_in_addr_t = parse_address(agent);
> } else {
> *pdu_in_addr_t = get_myaddr();
> }
>
> Note that this *only* works with IPv4 requests.
> If you're using anything else (IPv6, or non-IP
> transports), then this field should be left empty.
>
> Sorry for the confusion.
>
> Dave
>
>

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