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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.maintenance.acl;
import com.yahoo.vespa.hosted.node.admin.task.util.file.Editor;
import org.junit.jupiter.api.Test;
import java.util.List;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
* @author freva
*/
public class NatTableLineEditorTest {
@Test
void nat_set_redirect_rule_without_touching_docker_rules() {
assertNatTableLineEditorResult(
"-A OUTPUT -d 3001::1/128 -j REDIRECT",
"-P PREROUTING ACCEPT\n" +
"-P INPUT ACCEPT\n" +
"-P OUTPUT ACCEPT\n" +
"-P POSTROUTING ACCEPT\n" +
"-N DOCKER_OUTPUT\n" +
"-N DOCKER_POSTROUTING\n" +
"-A OUTPUT -d 127.0.0.11/32 -j DOCKER_OUTPUT\n" +
"-A POSTROUTING -d 127.0.0.11/32 -j DOCKER_POSTROUTING\n" +
"-A DOCKER_OUTPUT -d 127.0.0.11/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 127.0.0.11:43500\n" +
"-A DOCKER_OUTPUT -d 127.0.0.11/32 -p udp -m udp --dport 53 -j DNAT --to-destination 127.0.0.11:57392\n" +
"-A DOCKER_POSTROUTING -s 127.0.0.11/32 -p tcp -m tcp --sport 43500 -j SNAT --to-source :53\n" +
"-A DOCKER_POSTROUTING -s 127.0.0.11/32 -p udp -m udp --sport 57392 -j SNAT --to-source :53\n",
"-P PREROUTING ACCEPT\n" +
"-P INPUT ACCEPT\n" +
"-P OUTPUT ACCEPT\n" +
"-P POSTROUTING ACCEPT\n" +
"-N DOCKER_OUTPUT\n" +
"-N DOCKER_POSTROUTING\n" +
"-A OUTPUT -d 127.0.0.11/32 -j DOCKER_OUTPUT\n" +
"-A POSTROUTING -d 127.0.0.11/32 -j DOCKER_POSTROUTING\n" +
"-A DOCKER_OUTPUT -d 127.0.0.11/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 127.0.0.11:43500\n" +
"-A DOCKER_OUTPUT -d 127.0.0.11/32 -p udp -m udp --dport 53 -j DNAT --to-destination 127.0.0.11:57392\n" +
"-A DOCKER_POSTROUTING -s 127.0.0.11/32 -p tcp -m tcp --sport 43500 -j SNAT --to-source :53\n" +
"-A DOCKER_POSTROUTING -s 127.0.0.11/32 -p udp -m udp --sport 57392 -j SNAT --to-source :53\n" +
"-A OUTPUT -d 3001::1/128 -j REDIRECT");
}
@Test
void nat_cleanup_wrong_redirect_rules() {
assertNatTableLineEditorResult(
"-A OUTPUT -d 3001::1/128 -j REDIRECT",
"-P PREROUTING ACCEPT\n" +
"-P INPUT ACCEPT\n" +
"-P OUTPUT ACCEPT\n" +
"-P POSTROUTING ACCEPT\n" +
"-A OUTPUT -d 3001::2/128 -j REDIRECT\n",
"-P PREROUTING ACCEPT\n" +
"-P INPUT ACCEPT\n" +
"-P OUTPUT ACCEPT\n" +
"-P POSTROUTING ACCEPT\n" +
"-A OUTPUT -d 3001::1/128 -j REDIRECT");
}
@Test
void nat_delete_duplicate_rules() {
assertNatTableLineEditorResult(
"-A OUTPUT -d 3001::1/128 -j REDIRECT",
"-P PREROUTING ACCEPT\n" +
"-P INPUT ACCEPT\n" +
"-P OUTPUT ACCEPT\n" +
"-P POSTROUTING ACCEPT\n" +
"-A OUTPUT -d 3001::2/128 -j REDIRECT\n" +
"-A OUTPUT -d 3001::1/128 -j REDIRECT\n" +
"-A OUTPUT -d 3001::4/128 -j REDIRECT\n",
"-P PREROUTING ACCEPT\n" +
"-P INPUT ACCEPT\n" +
"-P OUTPUT ACCEPT\n" +
"-P POSTROUTING ACCEPT\n" +
"-A OUTPUT -d 3001::1/128 -j REDIRECT");
}
private static void assertNatTableLineEditorResult(String redirectRule, String currentNatTable, String expectedNatTable) {
NatTableLineEditor natLineEditor = NatTableLineEditor.from(redirectRule);
Editor editor = new Editor(
"nat-table",
() -> List.of(currentNatTable.split("\n")),
result -> assertEquals(expectedNatTable, String.join("\n", result)),
natLineEditor);
editor.edit(m -> {});
}
}
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