Re: [lwip-users] Status of snmp v3

[Mário Luzeiro]

Hi Dirk,

> it is technically complete
thanks for all your work!
I missed a bit some debug output as there are on other modules in LWIP but I am 
doing some manual debug.


I'm trying to run the example code with v3 and use snmpwalk (linux tool) to 
test it.
I changed the engine boot and time to be always 0 for test proposes.
I need to change the engineID to 12 octets(bytes) so snmpwalk (and wireshark) 
will not complain.

The far I can get is running this command and get this result:
$ snmpwalk -v3 -l authPriv -u lwip -a SHA -A "maplesyrup" -x DES -X 
"maplesyrup" 192.168.1.3 -e 555555555555555555555555 -Z 0,0
iso.3.6.1.2.1.1.1.0 = STRING: "lwIP example"
iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.26381
iso.3.6.1.2.1.1.3.0 = Timeticks: (100158) 0:16:41.58
iso.3.6.1.2.1.1.4.0 = STRING: "root"
iso.3.6.1.2.1.1.5.0 = STRING: "FQDN-unk"
iso.3.6.1.2.1.1.6.0 = STRING: "lwIP development PC"
iso.3.6.1.2.1.1.7.0 = INTEGER: 72
iso.3.6.1.2.1.2.1.0 = INTEGER: 1
iso.3.6.1.2.1.2.2.1.1.1 = INTEGER: 1
snmpwalk: Authentication failure (incorrect password, community or key)

Why is it getting some data and then in the end reports some authentication 
failure?
As I don't know about SNMP protocol, I am not sure if thats ok or something is 
wrong..
Hope you can clarify me.

Mario Luzeiro

________________________________________
From: lwip-users <lwip-users-bounces+mrluzeiro=address@hidden> on behalf of 
Dirk Ziegelmeier <address@hidden>
Sent: 24 September 2019 19:18
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Status of snmp v3

it is technically complete, it only needs proper implementation of the 
functions in
http://git.savannah.nongnu.org/cgit/lwip.git/tree/contrib/examples/snmp/snmp_v3/snmpv3_dummy.c

which is the glueing code to your application.

And of course it needs mbedtls in your project, or a reimplentation of
http://git.savannah.nongnu.org/cgit/lwip.git/tree/src/apps/snmp/snmpv3_mbedtls.c

Ciao
Dirk


On Tue, Sep 24, 2019 at 7:21 PM Mário Luzeiro 
<address@hidden<mailto:address@hidden>> wrote:
Hello all,
I'm testing SNMP sample from LWIP.

What is the status of SNMP V3 implementation in LWIP?
It only misses the user callback implementation or is missing something in the 
core?

I tried to build with V3 enabled and I got errors on the use of mbedtls_sha1* 
and mbedtls_md5* functions.
Am I missing some define?

Mario
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