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66 lines
2.3 KiB
66 lines
2.3 KiB
1 month ago
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From e5422e8537639fedba7efdcf82a75ab617990879 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Mon, 30 Oct 2023 16:53:59 +0100
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Subject: [PATCH] hwdb,rules: mark host-to-host network devices as only
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requiring link local addressing
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This is a generalization of this logic:
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https://github.com/NetworkManager/NetworkManager/blob/main/data/90-nm-thunderbolt.rules
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It applies not just to thunderbolt, but to any kind of device, even
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matched by vendor/product, via hwdb.
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I added two entries for Prolific PC-to-PC devices (of which I have one
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lying around).
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(cherry picked from commit ec541c569bd19bbb81791139371111a9a7f1a3d8)
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Related: RHEL-5950
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---
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hwdb.d/82-net-auto-link-local.hwdb | 12 ++++++++++++
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rules.d/82-net-auto-link-local.rules | 15 +++++++++++++++
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2 files changed, 27 insertions(+)
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create mode 100644 hwdb.d/82-net-auto-link-local.hwdb
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create mode 100644 rules.d/82-net-auto-link-local.rules
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diff --git a/hwdb.d/82-net-auto-link-local.hwdb b/hwdb.d/82-net-auto-link-local.hwdb
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new file mode 100644
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index 0000000000..4057378f4f
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--- /dev/null
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+++ b/hwdb.d/82-net-auto-link-local.hwdb
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@@ -0,0 +1,12 @@
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+# This file is part of systemd.
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+
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+# Network interfaces for which only Link-Local communication (i.e. IPv4LL, …)
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+# makes sense, because they almost certainy will point to another host, not an
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+# internet router.
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+
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+# (Note: matches against drivers go into 82-net-auto-link-local.rules instead)
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+
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+# Prolific USB-to-USB links (https://www.prolific.com.tw/US/ShowProduct.aspx?pcid=43)
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+usb:v067Bp25A1*
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+usb:v067Bp27A1*
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+ ID_NET_AUTO_LINK_LOCAL_ONLY=1
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diff --git a/rules.d/82-net-auto-link-local.rules b/rules.d/82-net-auto-link-local.rules
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new file mode 100644
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index 0000000000..88ac7bc1be
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--- /dev/null
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+++ b/rules.d/82-net-auto-link-local.rules
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@@ -0,0 +1,15 @@
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+# do not edit this file, it will be overwritten on update
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+
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+ACTION=="remove", GOTO="net_link_local_end"
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+SUBSYSTEM!="net", GOTO="net_link_local_end"
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+
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+# Network interfaces for which only Link-Local communication (i.e. IPv4LL, …)
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+# makes sense, because they almost certainy will point to another host, not an
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+# internet router.
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+
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+# (Note: matches against VID/PID go into 82-net-auto-link-local.hwdb instead)
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+
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+# Thunderbolt host-to-host connections
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+DRIVERS=="thunderbolt-net", ENV{ID_NET_AUTO_LINK_LOCAL_ONLY}="1"
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+
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+LABEL="net_link_local_end"
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