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tests: net: ipv6: Add tests for stable IIDs

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Add tests that verify that stable IIDs generate a proper IPv6
interface identifier described in RFC 7217.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
This commit is contained in:
Jukka Rissanen 2024-08-26 15:09:38 +03:00 • committed by Anas Nashif
commit 3a5c6c54c1
2 changed files with 73 additions and 5 deletions
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63
tests/net/iface/src/main.c
View file

@ -63,6 +63,7 @@ static struct net_if *iface1;
static struct net_if *iface2;
static struct net_if *iface3;
static struct net_if *iface4;
static struct net_if *eth_iface;
static bool test_failed;
static bool test_started;
@ -303,6 +304,7 @@ static void iface_cb(struct net_if *iface, void *user_data)
if (api->get_capabilities ==
eth_fake_api_funcs.get_capabilities) {
iface4 = iface;
eth_iface = iface;
}
} else {
switch (if_count) {
@ -1332,4 +1334,65 @@ ZTEST(net_iface, test_interface_name)
#endif
}
static void generate_iid(struct net_if *iface,
struct in6_addr *expected_addr,
struct in6_addr *iid_addr)
{
const struct in6_addr prefix = { { { 0x20, 0x01, 0x1b, 0x98, 0x24, 0xb8, 0x7e, 0xbb,
0, 0, 0, 0, 0, 0, 0, 0 } } };
struct net_linkaddr *lladdr = net_if_get_link_addr(iface);
uint8_t *mac;
int ret;
(void)net_iface_get_mac(net_if_get_device(iface));
lladdr = net_if_get_link_addr(eth_iface);
mac = lladdr->addr;
memcpy(expected_addr, &prefix, sizeof(struct in6_addr));
memcpy(&expected_addr->s6_addr[8], &mac[0], 3);
expected_addr->s6_addr[11] = 0xff;
expected_addr->s6_addr[12] = 0xfe;
memcpy(&expected_addr->s6_addr[13], &mac[3], 3);
expected_addr->s6_addr[8] ^= 0x02; /* Universal bit toggle */
ret = net_ipv6_addr_generate_iid(iface, &prefix, NULL, 0, 0, iid_addr,
net_if_get_link_addr(eth_iface));
zassert_equal(ret, 0, "Unexpected value (%d) returned", ret);
}
ZTEST(net_iface, test_ipv6_iid_eui64)
{
#if defined(CONFIG_NET_IPV6_IID_EUI_64)
struct in6_addr iid_addr = { };
struct in6_addr expected_addr = { };
generate_iid(eth_iface, &expected_addr, &iid_addr);
zassert_mem_equal(&expected_addr, &iid_addr, sizeof(struct in6_addr));
#else
ztest_test_skip();
#endif
}
ZTEST(net_iface, test_ipv6_iid_stable)
{
#if defined(CONFIG_NET_IPV6_IID_STABLE)
struct in6_addr iid_addr = { };
struct in6_addr expected_addr = { };
generate_iid(eth_iface, &expected_addr, &iid_addr);
/* Make sure that EUI-64 bytes are not there */
zassert_not_equal(iid_addr.s6_addr[11], 0xff);
zassert_not_equal(iid_addr.s6_addr[12], 0xfe);
zassert_true(memcmp(&expected_addr, &iid_addr, sizeof(struct in6_addr)) != 0,
"IID is EUI-64 instead of randomized");
#else
ztest_test_skip();
#endif
}
ZTEST_SUITE(net_iface, NULL, iface_setup, NULL, NULL, iface_teardown);

15
tests/net/iface/testcase.yaml
View file

@ -1,9 +1,14 @@
common:
min_ram: 16
depends_on: netif
tags:
- net
- iface
- userspace
tests:
net.iface:
tags:
- net
- iface
- userspace
net.iface.iid.eui64:
extra_configs:
- CONFIG_NET_IPV6_IID_EUI_64=y
net.iface.iid.stable:
extra_configs:
- CONFIG_NET_IPV6_IID_STABLE=y