buglwIP - A Lightweight TCP/IP stack - Bugs: bug #67099, Timer Randomization issue in IGMP...

 
 

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bug #67099: Timer Randomization issue in IGMP for ipv4

Submitter:  zmw <zmw12306>
Submitted:  Thu 08 May 2025 04:00:49 AM UTC
   
 
Category:  IPv4 Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
lwIP version:  git head

Thu 08 May 2025 04:00:49 AM UTC, original submission:  

 **RFC Requirement**: "Each timer is set to a different random value, using the highest clock granularity available on the host, selected from the range (0, Max Response Time]"

However, in the implementation, the range supports by the simplified timer calculation is  [1, max_time - 1], which violates the RFC-required range of (0, max_time].

zmw <zmw12306>

 

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