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Fix NetUtils: should ignore link-local address #14793

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zrlw merged 1 commit into from
Jun 24, 2025
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Fix NetUtils: should ignore link-local address #14793

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2 changes: 1 addition & 1 deletion dubbo-common/src/main/java/org/apache/dubbo/common/utils/NetUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -196,7 +196,7 @@ public static InetSocketAddress getLocalSocketAddress(String host, int port) {
}

static boolean isValidV4Address(InetAddress address) {
if (address == null || address.isLoopbackAddress()) {
if (address == null || address.isLoopbackAddress() || address.isLinkLocalAddress()) {
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@AlbumenJ AlbumenJ Oct 21, 2024

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What would happen if there is no any non-local interface

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@cyclinder cyclinder Oct 24, 2024

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if there is no non-local address, address.isLinkLocalAddress() would return false, This function wouldn't return directly, Continue with the logic below, same as if it was a lookback address.

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@yunmaoQu yunmaoQu Oct 23, 2024 •
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@AlbumenJ Just suggesstion:add a parameter called "allowLinkLocal(boolean)" in some related method( i find two extend point from original structure) .And user can config the value in system config file while it's default value is true to prevent the situation that though there is no any non-local interface and it also work , it's ok?

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@yunmaoQu yunmaoQu Oct 23, 2024

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i've done the work in local,if my idea is available and need my code ,i 'll push a request under this issue!

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@cyclinder cyclinder Oct 24, 2024

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Refer to https://github.com/apache/dubbo/pull/14793/files#r1814182854, address.isLinkLocalAddress() shouldn't affect if there is no non-local address. I don't have a Dubbo environment locally, Can you help test the changes? thanks a lot.

return false;
}

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