lwIP - A Lightweight TCP/IP stack - Bugs: bug #56136, The netif->mtu6 was updated by...
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bug #56136: The netif->mtu6 was updated by Router Advertisement abnomally
Submitter: | Gao Qingshui <kevingao> | ||
Submitted: | Sun 14 Apr 2019 01:45:19 PM UTC | ||
Category: | IPv6 | Severity: | 3 - Normal |
Item Group: | Faulty Behaviour | Status: | Fixed |
Privacy: | Public | Assigned to: | None |
Open/Closed: | Closed | Planned Release: | None |
lwIP version: | git head |
Mon 06 May 2019 10:45:11 AM UTC, comment #2: |
Dirk Ziegelmeier <dziegel> |
Tue 30 Apr 2019 11:49:35 AM UTC, comment #1: Additional TODO to avoid MTU getting smaller: On link down, MTU should be reset to initial value of netif->mtu (see netif->add()) |
Dirk Ziegelmeier <dziegel> |
Sun 14 Apr 2019 01:45:19 PM UTC, original submission:
Let's assume there are two routers in the network, we named them router A and B. The MTU announced in RA message from Router A is 1280, and the MTU from Router B is 1500. If the RA msg from Router A received by lwip before Router B, what's the netif->mtu6 in this scenario. The answer is the netif->mtu6 is 1500, and it is abnormal as we do IPv6 fragmentation using wrong MTU.
|
Gao Qingshui <kevingao> |
Depends on the following items: None found
Items that depend on this one: None found
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Follow 3 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2019-05-06 | dziegel | Status | None | Fixed | |
Open/Closed | Open | Closed | |||
2019-04-14 | kevingao | Attached File | - | Added update-netif-mtu6.patch, #46770 |
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Corresponding source code
Pushed your patch, thanks for reporting!