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[#4047] Added a UT

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added change log file

/src/bin/dhcp4/tests/classify_unittest.cc
    TEST_F(ClassifyTest, earlySubnetNoFallback) - new test
This commit is contained in:
Thomas Markwalder 2025-08-13 09:52:33 -04:00
parent 1116c1f0f8
commit 6331acdcbf
2 changed files with 68 additions and 3 deletions
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6
changelog_unreleased/4047-early-call-to-selectsubnet-with-sanity_only-true-alters-behavior-for-broadcast-clients Normal file
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@ -0,0 +1,6 @@
[bug] tmark
Corrected an issue in kea-dhcp4 which caused
broadcasted client queries to fail to match subnets
restricted to classes assigned during early global
host lookups.
(Gitlab #4047)

59
src/bin/dhcp4/tests/classify_unittest.cc
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@ -2476,4 +2476,63 @@ TEST_F(ClassifyTest, classTaggingList) {
}
}
// This test verifies that a broadcast message can rely on
// early global reservations lookup for selecting a guarded subnet.
// This test uses a single guarded subnet to ensure that subnet
// selection doesn't have default.
TEST_F(ClassifyTest, earlySubnetNoFallback) {
Dhcp4Client client(srv_, Dhcp4Client::SELECTING);
std::string config =
"{ \"interfaces-config\": {"
" \"interfaces\": [ \"*\" ]"
"},"
"\"valid-lifetime\": 600,"
"\"early-global-reservations-lookup\": true,"
"\"client-classes\": ["
"{"
" \"name\": \"only-one\""
"}],"
"\"subnet4\": ["
"{"
" \"subnet\": \"10.0.0.0/24\","
" \"id\": 1,"
" \"interface\": \"eth0\","
" \"pools\": [ { \"pool\": \"10.0.0.10-10.0.0.100\" } ],"
" \"client-class\": \"only-one\""
"}"
"],"
"\"reservations\": [ {"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\","
" \"client-classes\": [ \"only-one\" ] } ]"
"}";
// Configure DHCP server.
configure(config, *client.getServer());
// Set the HW address to the reservation.
client.setHWAddress("aa:bb:cc:dd:ee:ff");
// Send the discover.
client.doDiscover();
// Check response.
Pkt4Ptr resp = client.getContext().response_;
ASSERT_TRUE(resp);
EXPECT_EQ("10.0.0.10", resp->getYiaddr().toText());
// Try with a different HW address.
Dhcp4Client client2(srv_, Dhcp4Client::SELECTING);
// Set the HW address to another value. This will not select a subnet.
client2.setHWAddress("aa:bb:cc:01:ee:ff");
// Send the discover.
client2.doDiscover();
// Check response.
resp = client2.getContext().response_;
ASSERT_FALSE(resp);
}
} // end of anonymous namespace