I'm developing an app using net-snmp library version 5.5 on 64bit Linux.
The reading is asynchronous. I have this piece of code:
if (pdu->errstat == SNMP_ERR_NOERROR) {
while (vp) {
snprint_variable(buf, sizeof(buf), vp->name,
vp->name_length, vp);
snprint_objid(buf, sizeof(buf), vp->name, vp->name_length);
if (vp->type == ASN_OCTET_STR) {
if (index((char *)vp->val.string, '.'))
snprintf(value, sizeof(value), "%.2f", atof((char
*)vp->val.string));
else
snprintf(value, sizeof(value), "%d", atoi((char
*)vp->val.string));
} else if (vp->type == ASN_GAUGE) {
snprintf(value, sizeof(value), "%lu",
*vp->val.integer);
} else if (vp->type == ASN_INTEGER) {
snprintf(value, sizeof(value), "%li",
*vp->val.integer);
} else if (vp->type == ASN_COUNTER) {
snprintf(value, sizeof(value), "%lu",
*vp->val.integer);
} else if (vp->type == ASN_COUNTER64) {
long i64 = 0;
i64 = vp->val.counter64->low;
i64 |= vp->val.counter64->high << 32;
snprintf(value, sizeof(value), "%lu", i64);
} else if (vp->type == ASN_TIMETICKS) {
snprintf(value, sizeof(value), "%lu",
*vp->val.integer);
}
vp = vp->next_variable;
}
} else {
...
This code goes through the returned values and writes to the buffer the
*vp->val.XXX.
The problem is with the counter64 structure, containing "low" and "high"
unsigned long ints.
Is the code
long i64 = 0;
i64 = vp->val.counter64->low;
i64 |= vp->val.counter64->high << 32;
the proper implementation on 64bit system? Or how should I work with
counter64?
The problem is, that on 64bit system the library shows sizeof(struct
counter64) = 16 bytes, so I don't know how to work with it.
Or is there any function, that writes the value to the buffer? The
function snprint_variable() writes more than only the number, so it's
IMHO useless for my purpose.
Best regards, Tomas
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