Hi list,
Question about one MacAddress SNMP oject type we have in the MIB.
When sending a snmpget request to the MacAddress Object with the textual
names:
$ snmpget -v 3 -u ...... MPBC-RMH-MIB::mpbcRMHMacAddress.0 we get garbage:
MPBC-RMH-MIB::mpbcRMHMacAddress.0 = STRING:
36:43:3a:46:46:3a:42:45:3a:30:31:3a:30:30:3a:31:35
Then, if sending the getsnmp to the same object, but using the OID we get
the correct value "6C:FF:BE:01:00:15":
$ snmpget -v 3 -u ... .1.3.6.1.4.1.4464.2.1.4.1.5.0
SNMPv2-SMI::enterprises.4464.2.1.4.1.5.0 = STRING: "6C:FF:BE:01:00:15"
So in the code I should limit the string to 6 Bytes. So must I omit the
colon separated string when writing (see C source)?
Thanks,
Francois
>From the C source:
// Get MAC, format : "11:22:33:44:55:66"
if(!Exec_Popen_Cmd(s_mac_addr, sizeof(s_mac_addr), "ifconfig -a eth0 |
grep HWaddr | awk ' {print $5}'"))
{
strcpy(s_mac_addr, "??:??:??:??:??:??");
}
/* We are never called for a GETNEXT if it's registered as a
"instance", as it's "magically" handled for us. */
/* a instance handler also only hands us one request at a time, so
we don't need to loop over a list of requests; we'll only get one. */
switch(reqinfo->mode) {
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_OCTET_STR,
s_mac_addr, strlen(s_mac_addr)); // the length of the data in bytes
break;
default:
/* we should never get here, so this is a really bad error */
snmp_log(LOG_ERR, "unknown mode (%d) in
handle_mpbcRMHMacAddress\n", reqinfo->mode );
return SNMP_ERR_GENERR;
}
(...)
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