.params = route_attr,
};
+
+struct list_head prefixes = LIST_HEAD_INIT(prefixes);
+static struct device_prefix *ula_prefix = NULL;
+
+
static void
clear_if_addr(union if_addr *a, int mask)
{
{
struct interface *iface;
struct device_route *route, *r_next = NULL;
+ bool defaultroute_target = false;
+ int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
route = calloc(1, sizeof(*route));
if (!route)
- return false;
+ return NULL;
route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
route->mask = v6 ? 128 : 32;
- memcpy(&route->addr, addr, v6 ? sizeof(addr->in6) : sizeof(addr->in));
+ if (memcmp(&route->addr, addr, addrsize) == 0)
+ defaultroute_target = true;
+ else
+ memcpy(&route->addr, addr, addrsize);
vlist_for_each_element(&interfaces, iface, node) {
/* look for locally addressable target first */
interface_ip_find_route_target(iface, addr, v6, &r_next);
}
- if (!r_next)
+ if (!r_next) {
+ free(route);
return NULL;
+ }
iface = r_next->iface;
memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
done:
route->iface = iface;
- vlist_add(&iface->host_routes, &route->node, &route->flags);
+ if (defaultroute_target)
+ free(route);
+ else
+ vlist_add(&iface->host_routes, &route->node, &route->flags);
return iface;
}
}
if ((cur = tb[ROUTE_TARGET]) != NULL) {
- if (!inet_pton(af, blobmsg_data(cur), &route->addr)) {
+ if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
goto error;
}
route->flags |= DEVROUTE_METRIC;
}
- if ((cur = tb[ROUTE_MTU]) != NULL)
+ if ((cur = tb[ROUTE_MTU]) != NULL) {
route->mtu = blobmsg_get_u32(cur);
+ route->flags |= DEVROUTE_MTU;
+ }
vlist_add(&ip->route, &route->node, &route->flags);
return;
offsetof(struct device_route, flags));
}
+static int
+prefix_cmp(const void *k1, const void *k2, void *ptr)
+{
+ return memcmp(k1, k2, sizeof(struct device_prefix) -
+ offsetof(struct device_prefix, addr));
+}
+
+static void
+interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
+{
+ struct device *dev = iface->l3_dev.dev;
+ struct device_route route;
+
+ memset(&route, 0, sizeof(route));
+ route.iface = iface;
+ route.flags = addr->flags;
+ route.mask = addr->mask;
+ memcpy(&route.addr, &addr->addr, sizeof(route.addr));
+ clear_if_addr(&route.addr, route.mask);
+
+ if (add) {
+ route.flags |= DEVADDR_KERNEL;
+ system_del_route(dev, &route);
+
+ route.flags &= ~DEVADDR_KERNEL;
+ route.metric = iface->metric;
+ system_add_route(dev, &route);
+ } else {
+ system_del_route(dev, &route);
+ }
+}
+
static void
interface_update_proto_addr(struct vlist_tree *tree,
struct vlist_node *node_new,
struct device *dev;
struct device_addr *a_new = NULL, *a_old = NULL;
bool keep = false;
- struct device_route *route;
ip = container_of(tree, struct interface_ip_settings, addr);
iface = ip->iface;
uint32_t *a = (uint32_t *) &a_new->addr;
mask >>= a_new->mask;
- a_new->broadcast = *a | mask;
+ a_new->broadcast = *a | htonl(mask);
}
}
}
if (node_old) {
- if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep)
+ if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep) {
+ interface_handle_subnet_route(iface, a_old, false);
system_del_address(dev, a_old);
+ }
free(a_old);
}
if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) {
system_add_address(dev, a_new);
if (iface->metric)
- goto replace_route;
+ interface_handle_subnet_route(iface, a_new, true);
}
}
- return;
-
-replace_route:
- route = calloc(1, sizeof(*route));
- route->iface = iface;
- route->flags = a_new->flags | DEVADDR_KERNEL;
- route->mask = a_new->mask;
- memcpy(&route->addr, &a_new->addr, sizeof(route->addr));
- clear_if_addr(&route->addr, route->mask);
-
- system_del_route(dev, route);
-
- route->flags &= ~DEVADDR_KERNEL;
- route->metric = iface->metric;
- vlist_add(&ip->route, &route->node, &route->flags);
}
static bool
system_add_route(dev, route_new);
}
+
+static void
+interface_set_prefix_address(struct interface *iface, bool add,
+ struct device_prefix_assignment *assignment)
+{
+ struct interface *uplink = assignment->prefix->iface;
+ if (!iface->l3_dev.dev)
+ return;
+
+ struct device *l3_downlink = iface->l3_dev.dev;
+
+ struct device_addr addr;
+ memset(&addr, 0, sizeof(addr));
+ addr.addr.in6 = assignment->addr;
+ addr.mask = assignment->length;
+ addr.flags = DEVADDR_INET6;
+ addr.preferred_until = assignment->prefix->preferred_until;
+ addr.valid_until = assignment->prefix->valid_until;
+
+ if (!add) {
+ if (assignment->enabled)
+ system_del_address(l3_downlink, &addr);
+ } else {
+ system_add_address(l3_downlink, &addr);
+
+ if (uplink && uplink->l3_dev.dev) {
+ int mtu = system_update_ipv6_mtu(
+ uplink->l3_dev.dev, 0);
+ if (mtu > 0)
+ system_update_ipv6_mtu(l3_downlink, mtu);
+ }
+ }
+ assignment->enabled = add;
+}
+
+
+static void
+interface_update_prefix_assignments(struct vlist_tree *tree,
+ struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct device_prefix_assignment *old, *new;
+ old = container_of(node_old, struct device_prefix_assignment, node);
+ new = container_of(node_new, struct device_prefix_assignment, node);
+
+ // Assignments persist across interface reloads etc.
+ // so use indirection to avoid dangling pointers
+ struct interface *iface = vlist_find(&interfaces,
+ (node_new) ? new->name : old->name, iface, node);
+
+ if (node_old && node_new) {
+ new->addr = old->addr;
+ new->length = old->length;
+ } else if (node_old) {
+ if (iface)
+ interface_set_prefix_address(iface, false, old);
+ free(old->name);
+ free(old);
+ } else if (node_new) {
+ struct device_prefix *prefix = new->prefix;
+ uint64_t want = 1ULL << (64 - new->length);
+ prefix->avail &= ~(want - 1);
+ prefix->avail -= want;
+
+ // Invert assignment
+ uint64_t assigned = ~prefix->avail;
+ assigned &= (1ULL << (64 - prefix->length)) - 1;
+ assigned &= ~(want - 1);
+
+ // Assignment
+ new->addr = prefix->addr;
+ new->addr.s6_addr32[0] |=
+ htonl(assigned >> 32);
+ new->addr.s6_addr32[1] |=
+ htonl(assigned & 0xffffffffU);
+ new->addr.s6_addr[15] += 1;
+ }
+
+ if (node_new && (iface->state == IFS_UP || iface->state == IFS_SETUP))
+ interface_set_prefix_address(iface, true, new);
+}
+
+
+void
+interface_ip_set_prefix_assignment(struct device_prefix *prefix,
+ struct interface *iface, uint8_t length)
+{
+ if (!length || length > 64) {
+ struct device_prefix_assignment *assignment = vlist_find(
+ prefix->assignments, &iface, assignment, node);
+ if (assignment)
+ interface_set_prefix_address(iface, false, assignment);
+ } else {
+ uint8_t length = iface->proto_ip.assignment_length;
+ uint64_t want = 1ULL << (64 - length);
+ if (prefix->avail < want && prefix->avail > 0) {
+ do {
+ want = 1ULL << (64 - ++length);
+ } while (want > prefix->avail);
+ }
+
+ if (prefix->avail < want)
+ return;
+
+ // Assignment
+ struct device_prefix_assignment *assignment = calloc(1, sizeof(*assignment));
+ assignment->prefix = prefix;
+ assignment->length = length;
+ assignment->name = strdup(iface->name);
+
+ vlist_add(prefix->assignments, &assignment->node, assignment->name);
+ }
+}
+
+static void
+interface_update_prefix(struct vlist_tree *tree,
+ struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct device_prefix *prefix_old, *prefix_new;
+ prefix_old = container_of(node_old, struct device_prefix, node);
+ prefix_new = container_of(node_new, struct device_prefix, node);
+
+ struct device_route route;
+ memset(&route, 0, sizeof(route));
+ route.flags = DEVADDR_INET6;
+ route.metric = INT32_MAX;
+ route.mask = (node_new) ? prefix_new->length : prefix_old->length;
+ route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
+
+ if (node_old && node_new) {
+ prefix_new->avail = prefix_old->avail;
+ prefix_new->assignments = prefix_old->assignments;
+ prefix_old->assignments = NULL;
+
+ // Update all assignments
+ struct device_prefix_assignment *assignment;
+ struct vlist_tree *assignments = prefix_new->assignments;
+ vlist_for_each_element(assignments, assignment, node)
+ assignments->update(assignments,
+ &assignment->node, &assignment->node);
+ } else if (node_new) {
+ prefix_new->avail = 1ULL << (64 - prefix_new->length);
+ prefix_new->assignments = calloc(1, sizeof(*prefix_new->assignments));
+ vlist_init(prefix_new->assignments, avl_strcmp,
+ interface_update_prefix_assignments);
+
+ // Create initial assignments for interfaces
+ struct interface *iface;
+ vlist_for_each_element(&interfaces, iface, node)
+ interface_ip_set_prefix_assignment(prefix_new, iface,
+ iface->proto_ip.assignment_length);
+
+ list_add(&prefix_new->head, &prefixes);
+
+ // Set null-route to avoid routing loops
+ system_add_route(NULL, &route);
+ }
+
+ if (node_old) {
+ // Remove null-route
+ system_del_route(NULL, &route);
+
+ list_del(&prefix_old->head);
+
+ if (prefix_old->assignments) {
+ vlist_flush_all(prefix_old->assignments);
+ free(prefix_old->assignments);
+ }
+ free(prefix_old);
+ }
+}
+
+void
+interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
+ uint8_t length, time_t valid_until, time_t preferred_until)
+{
+ struct device_prefix *prefix = calloc(1, sizeof(*prefix));
+ prefix->length = length;
+ prefix->addr = *addr;
+ prefix->preferred_until = preferred_until;
+ prefix->valid_until = valid_until;
+ prefix->iface = iface;
+
+ if (iface)
+ vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
+ else
+ interface_update_prefix(NULL, &prefix->node, NULL);
+}
+
+void
+interface_ip_set_ula_prefix(const char *prefix)
+{
+ char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
+ strncpy(buf, prefix, sizeof(buf) - 1);
+ char *prefixaddr = strtok_r(buf, "/", &saveptr);
+
+ struct in6_addr addr;
+ if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1)
+ return;
+
+ int length;
+ char *prefixlen = strtok_r(NULL, ",", &saveptr);
+ if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
+ return;
+
+ if (ula_prefix && (!IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
+ ula_prefix->length != length)) {
+ interface_update_prefix(NULL, NULL, &ula_prefix->node);
+ ula_prefix = NULL;
+ }
+
+ interface_ip_add_device_prefix(NULL, &addr, length, 0, 0);
+}
+
void
interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
{
struct dns_server *s;
s = calloc(1, sizeof(*s));
+ if (!s)
+ return;
+
s->af = AF_INET;
if (inet_pton(s->af, str, &s->addr.in))
goto add;
}
vlist_update(&ip->route);
vlist_update(&ip->addr);
+ vlist_update(&ip->prefix);
}
void
vlist_simple_flush(&ip->dns_search);
vlist_flush(&ip->route);
vlist_flush(&ip->addr);
+ vlist_flush(&ip->prefix);
+ interface_write_resolv_conf();
}
void
vlist_simple_flush_all(&ip->dns_search);
vlist_flush_all(&ip->route);
vlist_flush_all(&ip->addr);
+ vlist_flush_all(&ip->prefix);
}
static void
vlist_simple_init(&ip->dns_servers, struct dns_server, node);
vlist_init(&ip->route, route_cmp, interface_update_proto_route);
vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
+ vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
}
void
projects / project / netifd.git / blobdiff