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Kernel: Treat 0.0.0.0 as a loopback address

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This matches what other operating systems like Linux do:

$ ip route get 0.0.0.0
local 0.0.0.0 dev lo src 127.0.0.1 uid 1000
    cache <local>

$ ssh 0.0.0.0
gunnar@0.0.0.0's password:

$ ss -na | grep :22 | grep ESTAB
tcp   ESTAB      0      0   127.0.0.1:43118   127.0.0.1:22
tcp   ESTAB      0      0   127.0.0.1:22      127.0.0.1:43118
This commit is contained in:
Gunnar Beutner 2021-05-12 12:14:03 +02:00 • committed by Andreas Kling
parent af59f64bc0
commit 532db9f768
3 changed files with 6 additions and 0 deletions
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2
Kernel/Net/NetworkAdapter.cpp
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@ -40,6 +40,8 @@ RefPtr<NetworkAdapter> NetworkAdapter::from_ipv4_address(const IPv4Address& addr
if (adapter->ipv4_address() == address || adapter->ipv4_broadcast() == address)
return adapter;
}
if (address[0] == 0 && address[1] == 0 && address[2] == 0 && address[3] == 0)
return LoopbackAdapter::the();
if (address[0] == 127)
return LoopbackAdapter::the();
return nullptr;