Re: Sending signed values problem
"corvace.fabrizio--- via Net-snmp-users" <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
Thank you so much for the reply, the command i'm using is the following: snmpset -v 2c -c public "IP" "OID" = -100 Watching the data over wireshark tho, the data length for that command is 1. But if i send for example -130 i get a data length of 2. > Il 27 giugno 2017 alle 16.51 Bill Fenner <[email protected]> ha scritto: > > On Thu, Jun 22, 2017 at 10:37 AM, corvace.fabrizio--- via Net-snmp-users <[email protected] mailto:[email protected] > wrote: > > > > > > Hello, > > > > I'm currently struggling with a data problem. > > > > I have a system where i have to SET a value, the value is of type Integer (-32768.32767). > > > > When sending a value over 255 i have no problem with sign, if i scan with wireshark i see a transmission of ASN type 2(Integer) with 2 bytes of data, and the data is correctly sent with sign. > > > > But whenever i try to send a value that is less that 256, therefore fits in a byte, the transmission is still of type 2, but it sends out one single byte of data, thus cutting out the range from -129 to -255 and from +128 to +255. > > > > I would have thought that since the OID is of type Integer (explicitly 16bit) the data would still have been sent as 2bytes. > > > > > BER encoding is variable length, no matter what the restrictions on the range of the integer - restrictions like that are managed at a higher layer. > > As you surmise, the BER encoding of values from -129 to -255 and +128 to +255 are two bytes long. > > > > > > I tried looking for a way of forcing 2 byte data send, but with no luck. Am i missing something? > > > > > How are you sending your data? I do not know of a way to force net-snmp to behave in this incorrect way. > > Bill > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Net-snmp-users mailing list [email protected] Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users