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nixos/networking-interfaces: clean up networking.sits

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This change rework a bit the documentation on networking.sits to explain
what they actually are. In fact, there are three different protocols
being collectively called "SIT", which itself is a nonstandard term.
This commit is contained in:
rnhmjoj
2025-06-15 16:55:28 +02:00
parent 1a8c90128b
commit 716634530e
3 changed files with 65 additions and 36 deletions
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25
nixos/modules/tasks/network-interfaces-scripted.nix
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@@ -627,7 +627,7 @@ let
deps = deviceDependency v.dev;
in
{
description = "6-to-4 Tunnel Interface ${n}";
description = "IPv6 in IPv4 Tunnel Interface ${n}";
wantedBy = [
"network-setup.service"
(subsystemDevice n)
@@ -641,18 +641,19 @@ let
script = ''
# Remove Dead Interfaces
ip link show dev "${n}" >/dev/null 2>&1 && ip link delete dev "${n}"
ip link add name "${n}" type sit \
${optionalString (v.remote != null) "remote \"${v.remote}\""} \
${optionalString (v.local != null) "local \"${v.local}\""} \
${optionalString (v.ttl != null) "ttl ${toString v.ttl}"} \
${optionalString (v.dev != null) "dev \"${v.dev}\""} \
${optionalString (v.encapsulation != null)
"encap ${v.encapsulation.type} encap-dport ${toString v.encapsulation.port} ${
optionalString (
v.encapsulation.sourcePort != null
) "encap-sport ${toString v.encapsulation.sourcePort}"
}"
ip link add name "${n}" type sit ${
formatIpArgs {
inherit (v)
remote
local
ttl
dev
;
encap = if v.encapsulation.type == "6in4" then null else v.encapsulation.type;
encap-dport = v.encapsulation.port;
encap-sport = v.encapsulation.sourcePort;
}
}
ip link set dev "${n}" up
'';
postStop = ''