+Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
+ assert_return(m, NULL);
+ assert_return(m->dhcp6_prefixes, NULL);
+ assert_return(addr, NULL);
+
+ return hashmap_get(m->dhcp6_prefixes, addr);
+}
+
+static int dhcp6_route_add_callback(sd_netlink *nl, sd_netlink_message *m,
+ void *userdata) {
+ Link *l = userdata;
+ int r;
+ union in_addr_union prefix;
+ _cleanup_free_ char *buf = NULL;
+
+ r = sd_netlink_message_get_errno(m);
+ if (r != 0) {
+ log_link_debug_errno(l, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in6_addr(m, RTA_DST, &prefix.in6);
+ if (r < 0) {
+ log_link_debug_errno(l, r, "Could not read IPv6 address from DHCPv6 Prefix Delegation while adding route: %m");
+ return 0;
+ }
+
+ (void) in_addr_to_string(AF_INET6, &prefix, &buf);
+ log_link_debug(l, "Added DHCPv6 Prefix Deleagtion route %s/64",
+ strnull(buf));
+
+ return 0;
+}
+
+int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
+ int r;
+ Route *route;
+
+ assert_return(m, -EINVAL);
+ assert_return(m->dhcp6_prefixes, -ENODATA);
+ assert_return(addr, -EINVAL);
+
+ r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
+ 0, 0, 0, &route);
+ if (r < 0)
+ return r;
+
+ r = route_configure(route, link, dhcp6_route_add_callback);
+ if (r < 0)
+ return r;
+
+ return hashmap_put(m->dhcp6_prefixes, addr, link);
+}
+
+static int dhcp6_route_remove_callback(sd_netlink *nl, sd_netlink_message *m,
+ void *userdata) {
+ Link *l = userdata;
+ int r;
+ union in_addr_union prefix;
+ _cleanup_free_ char *buf = NULL;
+
+ r = sd_netlink_message_get_errno(m);
+ if (r != 0) {
+ log_link_debug_errno(l, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in6_addr(m, RTA_DST, &prefix.in6);
+ if (r < 0) {
+ log_link_debug_errno(l, r, "Could not read IPv6 address from DHCPv6 Prefix Delegation while removing route: %m");
+ return 0;
+ }
+
+ (void) in_addr_to_string(AF_INET6, &prefix, &buf);
+ log_link_debug(l, "Removed DHCPv6 Prefix Delegation route %s/64",
+ strnull(buf));
+
+ return 0;
+}
+
+int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
+ Link *l;
+ int r;
+ Route *route;
+
+ assert_return(m, -EINVAL);
+ assert_return(m->dhcp6_prefixes, -ENODATA);
+ assert_return(addr, -EINVAL);
+
+ l = hashmap_remove(m->dhcp6_prefixes, addr);
+ if (!l)
+ return -EINVAL;
+
+ (void) sd_radv_remove_prefix(l->radv, addr, 64);
+ r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64,
+ 0, 0, 0, &route);
+ if (r >= 0)
+ (void) route_remove(route, l, dhcp6_route_remove_callback);
+
+ return 0;
+}
+
+int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) {
+ Iterator i;
+ Link *l;
+ struct in6_addr *addr;
+
+ assert_return(m, -EINVAL);
+ assert_return(link, -EINVAL);
+
+ HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) {
+ if (l != link)
+ continue;
+
+ (void) manager_dhcp6_prefix_remove(m, addr);
+ }
+
+ return 0;
+}
+
+static void dhcp6_prefixes_hash_func(const void *p, struct siphash *state) {
+ const struct in6_addr *addr = p;
+
+ assert(p);
+
+ siphash24_compress(addr, sizeof(*addr), state);
+}
+
+static int dhcp6_prefixes_compare_func(const void *_a, const void *_b) {
+ const struct in6_addr *a = _a, *b = _b;
+
+ return memcmp(a, b, sizeof(*a));
+}
+
+static const struct hash_ops dhcp6_prefixes_hash_ops = {
+ .hash = dhcp6_prefixes_hash_func,
+ .compare = dhcp6_prefixes_compare_func,
+};
+