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fix(vyos): prepare raw chains in link helper #46

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Merged
jmgilman merged 1 commit into from
May 1, 2026
Merged

fix(vyos): prepare raw chains in link helper #46

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15 changes: 14 additions & 1 deletion network/vyos/scripts/um760_link_mode.py
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,17 @@ def read_config_commands(self) -> str:
command = f"/bin/vbash -ic {shlex.quote('show configuration commands')}"
return self.run(command).stdout

def ensure_raw_chains(self) -> None:
command = (
"sudo nft list chain ip raw VYOS_TCP_MSS >/dev/null 2>&1 || "
"sudo nft 'add chain ip raw VYOS_TCP_MSS { type filter hook postrouting priority raw; policy accept; }'; "
"sudo nft list chain ip raw vyos_rpfilter >/dev/null 2>&1 || "
"sudo nft 'add chain ip raw vyos_rpfilter { type filter hook prerouting priority raw; policy accept; }'"
)
self.run(command)

def apply_config_commands(self, commands: list[str]) -> None:
self.ensure_raw_chains()
script = "\n".join(
[
"source /opt/vyatta/etc/functions/script-template",
Expand All @@ -100,7 +110,10 @@ def apply_config_commands(self, commands: list[str]) -> None:
"exit",
]
)
self.run("/bin/vbash -s", input_text=f"{script}\n")
result = self.run("/bin/vbash -s", input_text=f"{script}\n")
output = "\n".join(part for part in (result.stdout, result.stderr) if part)
if "Commit failed" in output:
raise RuntimeError(output.strip())


def bridge_members(config: str, bridge: str) -> list[str]:
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