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tests: net: dhcpv4_server: Add tests for declined address expiry/reuse 

Verify that declined addresses are not permanently blocked - i. e.
expire after configured timeout and in case of free address shortage,
can be reused.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2024-02-12 09:46:54 +01:00 committed by Fabio Baltieri
parent e28428caae
commit 3ea05cc958
2 changed files with 51 additions and 10 deletions
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3
tests/net/dhcpv4/server/prj.conf
View File

@ -11,8 +11,9 @@ CONFIG_NET_IPV4=y
CONFIG_NET_IPV6=n
CONFIG_NET_UDP=y
CONFIG_NET_DHCPV4_SERVER=y
# Reduce probe timeout to speed up tests
# Reduce probe/decline timeout to speed up tests
CONFIG_NET_DHCPV4_SERVER_ICMP_PROBE_TIMEOUT=10
CONFIG_NET_DHCPV4_SERVER_ADDR_DECLINE_TIME=1
# We need to set POSIX_API and use picolibc for eventfd to work
CONFIG_POSIX_API=y

58
tests/net/dhcpv4/server/src/main.c
View File

@ -389,15 +389,19 @@ static void get_reserved_address(struct in_addr *reserved)
zassert_ok(ret, "Failed to obtain reserved address");
}
static void client_get_lease(void)
static void client_get_lease(bool verify)
{
client_send_discover();
verify_lease_count(1, 0, 0);
if (verify) {
verify_lease_count(1, 0, 0);
}
get_reserved_address(&test_ctx.assigned_ip);
test_pkt_free();
client_send_request_solicit();
verify_lease_count(0, 1, 0);
if (verify) {
verify_lease_count(0, 1, 0);
}
test_pkt_free();
}
@ -799,7 +803,7 @@ ZTEST(dhcpv4_server_tests, test_request)
*/
ZTEST(dhcpv4_server_tests, test_renew)
{
client_get_lease();
client_get_lease(true);
client_send_request_renew();
verify_ack(false, true);
@ -812,7 +816,7 @@ ZTEST(dhcpv4_server_tests, test_renew)
*/
ZTEST(dhcpv4_server_tests, test_rebind)
{
client_get_lease();
client_get_lease(true);
client_send_request_rebind();
verify_ack(false, true);
@ -824,7 +828,7 @@ ZTEST(dhcpv4_server_tests, test_rebind)
ZTEST(dhcpv4_server_tests, test_expiry)
{
test_ctx.lease_time = 1;
client_get_lease();
client_get_lease(true);
/* Add extra 10ms to avoid race. */
k_msleep(1000 + 10);
@ -836,7 +840,7 @@ ZTEST(dhcpv4_server_tests, test_expiry)
*/
ZTEST(dhcpv4_server_tests, test_release)
{
client_get_lease();
client_get_lease(true);
client_send_release();
verify_lease_count(0, 0, 0);
@ -865,16 +869,52 @@ static void verify_declined_address(struct in_addr *declined)
}
/* Verify that the DHCP server blocks the address after receiving Decline
* message.
* message, and gets released after configured time.
*/
ZTEST(dhcpv4_server_tests, test_decline)
{
client_get_lease();
client_get_lease(true);
verify_lease_count(0, 1, 0);
client_send_decline();
verify_lease_count(0, 0, 1);
verify_declined_address(&test_ctx.assigned_ip);
/* Add extra 10ms to avoid race. */
k_msleep(1000 + 10);
verify_lease_count(0, 0, 0);
}
/* Verify that if all of the address leases get blocked (due to conflict), the
* server will try to reuse the oldest blocked entry on Discovery.
*/
ZTEST(dhcpv4_server_tests, test_declined_reuse)
{
struct in_addr oldest_addr;
for (int i = 0; i < CONFIG_NET_DHCPV4_SERVER_ADDR_COUNT; i++) {
client_get_lease(false);
if (i == 0) {
oldest_addr = test_ctx.assigned_ip;
}
client_send_decline();
k_msleep(10);
}
verify_lease_count(0, 0, 4);
client_send_discover();
verify_offer(false);
verify_lease_count(1, 0, 3);
test_pkt_free();
client_send_request_solicit();
verify_ack(false, false);
verify_lease_count(0, 1, 3);
test_pkt_free();
zassert_equal(oldest_addr.s_addr, test_ctx.assigned_ip.s_addr,
"Should've reassing oldest declined address");
}
/* Verify that the DHCP server replies with ACK for a Inform message, w/o