buglwIP - A Lightweight TCP/IP stack - Bugs: bug #58184, Incorrect generic trap conversion...


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bug #58184: Incorrect generic trap conversion to SNMP v2c trap

Submitted by:  Harrold <harrold68>
Submitted on:  Wed 15 Apr 2020 11:56:08 AM UTC  
Category:  apps Severity:  3 - Normal
Item Group:  Faulty Behaviour Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
lwIP version:  git head

Wed 15 Apr 2020 11:56:08 AM UTC, original submission:  

Implementation of generic traps conversion to SNMP v2c traps in function snmp_prepare_trap_oid() is not correctly. This function is using specific_trap, but according the comment above function snmp_send_trap_or_notification_or_inform_generic(), specific_trap is only used when generic_trap == 6. That is why function snmp_send_trap_generic() passes 0 as specific_trap.

I assume function snmp_prepare_trap_oid() should use generic_trap+1 instead of specific_trap+1 when generic_trap != 6 (SNMP_GENTRAP_ENTERPRISE_SPECIFIC).

Expected list of generic SNMP v2 traps

- coldStart
- warmStart
- linkDown
- linkUp
- authenticationFailure
- egpNeighborLoss

Currently al these traps emit

Harrold <harrold68>


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