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-rw-r--r--src/network/netdev/netdev-util.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/network/netdev/netdev-util.c b/src/network/netdev/netdev-util.c
new file mode 100644
index 0000000..2350624
--- /dev/null
+++ b/src/network/netdev/netdev-util.c
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "netdev-util.h"
+#include "networkd-address.h"
+#include "networkd-link.h"
+#include "string-table.h"
+
+static const char * const netdev_local_address_type_table[_NETDEV_LOCAL_ADDRESS_TYPE_MAX] = {
+ [NETDEV_LOCAL_ADDRESS_IPV4LL] = "ipv4_link_local",
+ [NETDEV_LOCAL_ADDRESS_IPV6LL] = "ipv6_link_local",
+ [NETDEV_LOCAL_ADDRESS_DHCP4] = "dhcp4",
+ [NETDEV_LOCAL_ADDRESS_DHCP6] = "dhcp6",
+ [NETDEV_LOCAL_ADDRESS_SLAAC] = "slaac",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(netdev_local_address_type, NetDevLocalAddressType);
+
+int link_get_local_address(
+ Link *link,
+ NetDevLocalAddressType type,
+ int family,
+ int *ret_family,
+ union in_addr_union *ret_address) {
+
+ Address *a;
+
+ assert(link);
+
+ switch (type) {
+ case NETDEV_LOCAL_ADDRESS_IPV4LL:
+ assert(IN_SET(family, AF_UNSPEC, AF_INET));
+ family = AF_INET;
+ break;
+ case NETDEV_LOCAL_ADDRESS_IPV6LL:
+ assert(IN_SET(family, AF_UNSPEC, AF_INET6));
+ family = AF_INET6;
+ break;
+ case NETDEV_LOCAL_ADDRESS_DHCP4:
+ assert(IN_SET(family, AF_UNSPEC, AF_INET));
+ family = AF_INET;
+ break;
+ case NETDEV_LOCAL_ADDRESS_DHCP6:
+ assert(IN_SET(family, AF_UNSPEC, AF_INET6));
+ family = AF_INET6;
+ break;
+ case NETDEV_LOCAL_ADDRESS_SLAAC:
+ assert(IN_SET(family, AF_UNSPEC, AF_INET6));
+ family = AF_INET6;
+ break;
+ default:
+ assert_not_reached();
+ }
+
+ if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false))
+ return -EBUSY;
+
+ SET_FOREACH(a, link->addresses) {
+ if (!address_is_ready(a))
+ continue;
+
+ if (a->family != family)
+ continue;
+
+ if (in_addr_is_set(a->family, &a->in_addr_peer))
+ continue;
+
+ switch (type) {
+ case NETDEV_LOCAL_ADDRESS_IPV4LL:
+ if (a->source != NETWORK_CONFIG_SOURCE_IPV4LL)
+ continue;
+ break;
+ case NETDEV_LOCAL_ADDRESS_IPV6LL:
+ if (!in6_addr_is_link_local(&a->in_addr.in6))
+ continue;
+ break;
+ case NETDEV_LOCAL_ADDRESS_DHCP4:
+ if (a->source != NETWORK_CONFIG_SOURCE_DHCP4)
+ continue;
+ break;
+ case NETDEV_LOCAL_ADDRESS_DHCP6:
+ if (a->source != NETWORK_CONFIG_SOURCE_DHCP6)
+ continue;
+ break;
+ case NETDEV_LOCAL_ADDRESS_SLAAC:
+ if (a->source != NETWORK_CONFIG_SOURCE_NDISC)
+ continue;
+ break;
+ default:
+ assert_not_reached();
+ }
+
+ if (ret_family)
+ *ret_family = a->family;
+ if (ret_address)
+ *ret_address = a->in_addr;
+ return 1;
+ }
+
+ return -ENXIO;
+}