+subnet_t *lookup_subnet_ipv6(const ipv6_t *address) {
+ subnet_t *r = NULL;
+
+ // Check if this address is cached
+
+ if((r = hash_search(ipv6_t, &ipv6_cache, address))) {
+ return r;
+ }
+
+ // Search all subnets for a matching one
+
+ for splay_each(subnet_t, p, &subnet_tree) {
+ if(!p || p->type != SUBNET_IPV6) {
+ continue;
+ }
+
+ if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength)) {
+ r = p;
+
+ if(!p->owner || p->owner->status.reachable) {
+ break;
+ }
+ }
+ }
+
+ // Cache the result
+
+ if(r) {
+ hash_insert(ipv6_t, &ipv6_cache, address, r);
+ }
+
+ return r;
+}
+
+void subnet_update(node_t *owner, subnet_t *subnet, bool up) {
+ char netstr[MAXNETSTR];
+ char *name, *address, *port;
+ char empty[] = "";
+
+ // Prepare environment variables to be passed to the script
+
+ environment_t env;
+ environment_init(&env);
+ environment_add(&env, "NODE=%s", owner->name);
+
+ if(owner != myself) {
+ sockaddr2str(&owner->address, &address, &port);
+ environment_add(&env, "REMOTEADDRESS=%s", address);
+ environment_add(&env, "REMOTEPORT=%s", port);
+ free(port);
+ free(address);
+ }
+
+ int env_subnet = environment_add(&env, NULL);
+ int env_weight = environment_add(&env, NULL);
+
+ name = up ? "subnet-up" : "subnet-down";
+
+ if(!subnet) {
+ for splay_each(subnet_t, subnet, &owner->subnet_tree) {
+ if(!net2str(netstr, sizeof(netstr), subnet)) {
+ continue;
+ }
+
+ // Strip the weight from the subnet, and put it in its own environment variable
+ char *weight = strchr(netstr, '#');
+
+ if(weight) {
+ *weight++ = 0;
+ } else {
+ weight = empty;
+ }
+
+ // Prepare the SUBNET and WEIGHT variables
+ environment_update(&env, env_subnet, "SUBNET=%s", netstr);
+ environment_update(&env, env_weight, "WEIGHT=%s", weight);
+
+ execute_script(name, &env);
+ }
+ } else {
+ if(net2str(netstr, sizeof(netstr), subnet)) {
+ // Strip the weight from the subnet, and put it in its own environment variable
+ char *weight = strchr(netstr, '#');
+
+ if(weight) {
+ *weight++ = 0;
+ } else {
+ weight = empty;
+ }
+
+ // Prepare the SUBNET and WEIGHT variables
+ environment_update(&env, env_subnet, "SUBNET=%s", netstr);
+ environment_update(&env, env_weight, "WEIGHT=%s", weight);
+
+ execute_script(name, &env);
+ }
+ }
+
+ environment_exit(&env);