snmptrap unsigned type not working as expected

Hi,

I am using snmpV3 adapter and passing V2 traps to it by using commands as
below. It looks like the range for type *u* (i.e. unsigned) is upto (2^31)
- 1 (i.e. 2147483647). I was expecting it to be (2^32) - 1 (i.e.
4294967295).

snmptrap -c public -v 2c clm-pun-009642 '' 1.3.6.1.4.1.20006.1.0.5
1.3.6.1.4.1.12345.1 u 2147483647

Above command generates following log:
trace:  ..\..\snmplib\snmp_api.c, 5293:
dumph_recv:             Value
dumpx_recv:              42 04 7F FF FF FF
dumpv_recv:                UInteger:    2147483647 (0x7FFFFFFF)


snmptrap -c public -v 2c clm-pun-009642 '' 1.3.6.1.4.1.20006.1.0.5
1.3.6.1.4.1.12345.1 u 2147483648

Above command generates following log:
trace:  ..\..\snmplib\snmp_api.c, 5293:
dumph_recv:             Value
dumpx_recv:              42 05 00 80 00 00 00
dumpv_recv:                UInteger:    -2147483648 (0x80000000)

Refer to:
http://www.net-snmp.org/docs/man/snmptrap.html

I am using net-snmp v5.5.

Is this the correct behavior or am I missing something?

Thanks.

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