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From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [Bug 961] PCAP PMD receives packets larger then MTU
Date: Tue, 04 Jul 2023 17:43:09 +0000
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Date: Tue, 4 Jul 2023 19:43:09 +0200
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https://bugs.dpdk.org/show_bug.cgi?id=3D961
Stephen Hemminger (stephen@networkplumber.org) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |stephen@networkplumber.org
Resolution|--- |WONTFIX
Status|UNCONFIRMED |RESOLVED
--- Comment #4 from Stephen Hemminger (stephen@networkplumber.org) ---
This is not a bug. Other drivers allow bigger frames.
It is part of the overall confusion of what does MTU mean in OS.
In Linux and FreeBSD, it is maximum transmission unit and it also
serves as the minimum receive unit for device drivers.
Many device drivers will receive oversize packets, and leave it up to upper
layers to handle. It is the device driver version of the robustness princip=
le
(aka Postel's Law).
--=20
You are receiving this mail because:
You are the assignee for the bug.=
--16884925891.5Af5269.829525
Date: Tue, 4 Jul 2023 19:43:09 +0200
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<html>
<head>
<base href=3D"https://bugs.dpdk.org/">
</head>
<body><span class=3D"vcard"><a class=3D"email" href=3D"mailto:stephen&#=
64;networkplumber.org" title=3D"Stephen Hemminger (stephen@networkplumb=
er.org)"> <span class=3D"fn">Stephen Hemminger</span></a>
</span> changed
<a class=3D"bz_bug_link=20
bz_status_RESOLVED bz_closed"
title=3D"RESOLVED WONTFIX - PCAP PMD receives packets larger then MTU"
href=3D"https://bugs.dpdk.org/show_bug.cgi?id=3D961">bug 961</a>
<br>
<table border=3D"1" cellspacing=3D"0" cellpadding=3D"8" class=
=3D"bz_diff_table">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style=3D"text-align:right;">CC</td>
<td>
</td>
<td>stephen@networkplumber.org
</td>
</tr>
<tr>
<td style=3D"text-align:right;">Resolution</td>
<td>---
</td>
<td>WONTFIX
</td>
</tr>
<tr>
<td style=3D"text-align:right;">Status</td>
<td>UNCONFIRMED
</td>
<td>RESOLVED
</td>
</tr></table>
<p>
<div class=3D"bz_comment_block">
<b class=3D"bz_comment_head"><a class=3D"bz_bug_link=20
bz_status_RESOLVED bz_closed"
title=3D"RESOLVED WONTFIX - PCAP PMD receives packets larger then MTU"
href=3D"https://bugs.dpdk.org/show_bug.cgi?id=3D961#c4">Comment # 4</a>
on <a class=3D"bz_bug_link=20
bz_status_RESOLVED bz_closed"
title=3D"RESOLVED WONTFIX - PCAP PMD receives packets larger then MTU"
href=3D"https://bugs.dpdk.org/show_bug.cgi?id=3D961">bug 961</a>
from <span class=3D"vcard"><a class=3D"email" href=3D"mailto:=
stephen@networkplumber.org" title=3D"Stephen Hemminger (stephen@net=
workplumber.org)"> <span class=3D"fn">Stephen Hemminger</span></a>
</span>
</b>
<pre class=3D"bz_comment_text">This is not a bug. Other drivers a=
llow bigger frames.
It is part of the overall confusion of what does MTU mean in OS.
In Linux and FreeBSD, it is maximum transmission unit and it also
serves as the minimum receive unit for device drivers.
Many device drivers will receive oversize packets, and leave it up to upper
layers to handle. It is the device driver version of the robustness princip=
le
(aka Postel's Law).
</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
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=20=20=20=20=20=20=20=20=20=20
<link itemprop=3D"url" href=3D"https://bugs.dpdk.org/show_bug.cgi=
?id=3D961#c4">
<meta itemprop=3D"name" content=3D"View bug">
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--16884925891.5Af5269.829525--