Hi Coders,

I have below queries regarding trap types where I found little mismatch with 
RFC2578 definition and net-snmp5.7.3 behavior on boundary values.
It will be of great help if someone can clarify on this.

For convenience, below definitions are used.
INT32_MAX 2147483647
NINT32_MAX -2147483648
UINT32_MAX 4294967295

Since RFC 2578 does not mention the behavior for integer overflow, net-snmp 
currently sticks to NINT32_MAX  or INT32_MAX for integer overflows on both 
sides. Please clarify what should be the actual behavior?

2.      GAUGE32

RFC2578 says "The Gauge32 type represents a non-negative integer, which may 
increase or decrease, but shall never exceed a maximum value, nor fall below a 
minimum value. The maximum value cannot be greater than 2^32-1 (4294967295 
decimal), and the minimum value cannot be smaller than 0 "

But net-snmp wraps around to 2^31 - 1 for any value less than 0. This does not 
conforms to RFC definition. Is this a bug with in net-snmp?

3.      UNSIGNED32
RFC2578 says the range lies between 0 to 2^32-1 but there is no information on 
overflows. Currently for overflow net-snmp gives UINT32_MAX but for input 
value= -1 it wraps around  to UINT32_MAX.
What should be the behavior for -1 and integer overflow for this trap type?

4.      COUNTER

RFC2578 says counter range is 0 to 2^32-1 and should wrap around for UINT32_MAX 
+ 1. But for overflow netsnmp remains at UINT32_MAX which is not RFC2578 
complaint. Looks like a bug. Please clarify.

Also for value =-1, net-snmp gives UINT32_MAX which wraps around on other 
direction. Is this correct behavior?


RFC2578 says the range is from 0 to 2^32 which is bit contradictory as it 
violates basic unsigned 32 bit integer range. Currently net-snmp stands at 
UINT32_MAX for 2^32 input value. Please clarify on this.


This is little bit important query as I am not aware of how it should be used.

Please let me know how the BITSTRING should be used along with few example for 
better clarity.

I am aware that my queries are little bit lengthy but it is my humble request 
if anybody can answer these questions it will be of great help for me.

Thanks in advance.


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