+subnet_t *lookup_subnet_ipv6(const ipv6_t *address) {
+ subnet_t *r = NULL;
+
+ // Check if this address is cached
+
+ if((r = hash_search(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_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
+
+ char *envp[10] = {NULL};
+ int n = 0;
+ xasprintf(&envp[n++], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[n++], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[n++], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[n++], "NODE=%s", owner->name);
+
+ if(owner != myself) {
+ sockaddr2str(&owner->address, &address, &port);
+ xasprintf(&envp[n++], "REMOTEADDRESS=%s", address);
+ xasprintf(&envp[n++], "REMOTEPORT=%s", port);
+ free(port);
+ free(address);
+ }
+
+ xasprintf(&envp[n++], "NAME=%s", myself->name);
+
+ 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
+ free(envp[n]);
+ free(envp[n + 1]);
+ xasprintf(&envp[n], "SUBNET=%s", netstr);
+ xasprintf(&envp[n + 1], "WEIGHT=%s", weight);
+
+ execute_script(name, envp);
+ }
+ } 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
+ xasprintf(&envp[n], "SUBNET=%s", netstr);
+ xasprintf(&envp[n + 1], "WEIGHT=%s", weight);
+
+ execute_script(name, envp);
+ }
+ }
+
+ for(int i = 0; envp[i] && i < 9; i++)
+ free(envp[i]);