Re: [lwip-users] Lwip SNMP support: adding LWIP_IPSTACK_MIB2 Compile-Time configuration

[address@hidden]

Mike Kleshov wrote:
> I'd like to share my experience with SNMP too.
> I had to add SNMP support to my application. I looked at lwip's SNMP 
> agent and decided that it was too big and complicated for me (I didn't 
> need all the features.) So I decided to create my own SNMP agent. The 
> result is a small (650 lines) and simple SNMPv1 agent with no write 
> support. I didn't need MIB parsing either, so OIDs were hard-coded in 
> binary representation.
The problem of lwIP's SNMP agent is that it seems to be written for 
external mibs that get/set their data asynchronously. The second 
"feature" many people wouldn't need is the ability to add or remove tree 
entries at runtime. The agent could be a lot smaller if these two 
features wouldn't be included!
> I didn't need any of the MIB-2 data either. So I guess it is possible 
> to have an SNMP agent and not have MIB-2 info collection.
Of course it is, but someone has to do the work (change the code to 
support it). Unless that's done, adding a compile-time check that for 
LWIP_SNMP (use lwIP's agent), LWIP_MIB2 is necessary is a good thing to do.

Simon