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tests: net: iface: verify multicast address not removed if used

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If two IPv6 addresses have the same solicited-node multicast address
because they derive from the same EUI-64 interface identifier, make sure
that the solicited-node multicast address is not removed when one of the
IPV6 address is removed but only when both addresses are removed.

Signed-off-by: Florian Vaussard <florian.vaussard@gmail.com>
This commit is contained in:
Florian Vaussard 2023-06-27 14:57:49 +02:00 committed by Fabio Baltieri
parent 6837229ff2
commit 90355f143f
1 changed files with 54 additions and 0 deletions
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54
tests/net/iface/src/main.c
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@ -879,6 +879,60 @@ ZTEST(net_iface, test_v6_addr_add_rm)
v6_addr_rm();
}
ZTEST(net_iface, test_v6_addr_add_rm_solicited)
{
const struct in6_addr prefix = { { { 0x20, 0x01, 0x1b, 0x98, 0x24, 0xb8, 0x7e, 0xbb,
0, 0, 0, 0, 0, 0, 0, 0 } } };
struct in6_addr iid_addr = { };
struct in6_addr iid_addr_mcast = { };
struct in6_addr unicast_addr = { };
struct in6_addr unicast_addr_mcast = { };
struct net_if_addr *ifaddr;
struct net_if_mcast_addr *maddr;
bool ret;
/* Add a link-local address based on the interface identifier */
net_ipv6_addr_create_iid(&iid_addr, net_if_get_link_addr(iface4));
ifaddr = net_if_ipv6_addr_add(iface4, &iid_addr,
NET_ADDR_AUTOCONF, 0);
zassert_not_null(ifaddr, "Cannot add IPv6 link-local address");
/* Add the corresponding solicited-node multicast address */
net_ipv6_addr_create_solicited_node(&iid_addr, &iid_addr_mcast);
maddr = net_if_ipv6_maddr_add(iface4, &iid_addr_mcast);
zassert_not_null(maddr, "Cannot add solicited-node multicast address");
/* Add an autoconfigured global unicast address */
net_ipv6_addr_create_iid(&unicast_addr, net_if_get_link_addr(iface4));
memcpy(&unicast_addr, &prefix, sizeof(prefix) / 2);
ifaddr = net_if_ipv6_addr_add(iface4, &unicast_addr,
NET_ADDR_AUTOCONF, 0);
zassert_not_null(ifaddr, "Cannot add IPv6 global unicast address");
/* Add the corresponding solicited-node multicast address (should exist) */
net_ipv6_addr_create_solicited_node(&unicast_addr, &unicast_addr_mcast);
zassert_mem_equal(&unicast_addr_mcast, &iid_addr_mcast,
sizeof(struct in6_addr));
maddr = net_if_ipv6_maddr_add(iface4, &unicast_addr_mcast);
zassert_is_null(maddr, "Solicited-node multicast address was added twice");
/* Remove the global unicast address */
ret = net_if_ipv6_addr_rm(iface4, &unicast_addr);
zassert_true(ret, "Cannot remove IPv6 global unicast address");
/* The solicited-node multicast address should stay */
maddr = net_if_ipv6_maddr_lookup(&iid_addr_mcast, &iface4);
zassert_not_null(maddr, "Solicited-node multicast address was removed");
/* Remove the link-local address */
ret = net_if_ipv6_addr_rm(iface4, &iid_addr);
zassert_true(ret, "Cannot remove IPv6 link-local address");
/* The solicited-node multicast address should be gone */
maddr = net_if_ipv6_maddr_lookup(&iid_addr_mcast, &iface4);
zassert_is_null(maddr, "Solicited-node multicast address was not removed");
}
#define MY_ADDR_V6_USER { { { 0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0x65 } } }