+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
.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)
+{
+ int m_bytes = (mask + 7) / 8;
+ uint8_t m_clear = (1 << (m_bytes * 8 - mask)) - 1;
+ uint8_t *p = (uint8_t *) a;
+
+ if (m_bytes < sizeof(a))
+ memset(p + m_bytes, 0, sizeof(a) - m_bytes);
+
+ p[m_bytes - 1] &= ~m_clear;
+}
+
+static bool
+match_if_addr(union if_addr *a1, union if_addr *a2, int mask)
+{
+ union if_addr *p1, *p2;
+
+ p1 = alloca(sizeof(*a1));
+ p2 = alloca(sizeof(*a2));
+
+ memcpy(p1, a1, sizeof(*a1));
+ clear_if_addr(p1, mask);
+ memcpy(p2, a2, sizeof(*a2));
+ clear_if_addr(p2, mask);
+
+ return !memcmp(p1, p2, sizeof(*p1));
+}
+
+static bool
+__find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
+{
+ struct device_addr *addr;
+
+ vlist_for_each_element(&ip->addr, addr, node) {
+ if (!addr->enabled)
+ continue;
+
+ if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
+ continue;
+
+ if (!match_if_addr(&addr->addr, a, addr->mask))
+ continue;
+
+ return true;
+ }
+
+ return false;
+}
+
+static void
+__find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
+ bool v6, struct device_route **res)
+{
+ struct device_route *route;
+
+ vlist_for_each_element(&ip->route, route, node) {
+ if (!route->enabled)
+ continue;
+
+ if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
+ continue;
+
+ if (!match_if_addr(&route->addr, a, route->mask))
+ continue;
+
+ if (!*res || route->mask < (*res)->mask)
+ *res = route;
+ }
+}
+
+static bool
+interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
+{
+ return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
+ __find_ip_addr_target(&iface->config_ip, a, v6);
+}
+
+static void
+interface_ip_find_route_target(struct interface *iface, union if_addr *a,
+ bool v6, struct device_route **route)
+{
+ __find_ip_route_target(&iface->proto_ip, a, v6, route);
+ __find_ip_route_target(&iface->config_ip, a, v6, route);
+}
+
+struct interface *
+interface_ip_add_target_route(union if_addr *addr, bool v6)
+{
+ 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 NULL;
+
+ route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
+ route->mask = v6 ? 128 : 32;
+ 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 */
+ if (interface_ip_find_addr_target(iface, addr, v6))
+ goto done;
+
+ /* do not stop at the first route, let the lookup compare
+ * masks to find the best match */
+ interface_ip_find_route_target(iface, addr, v6, &r_next);
+ }
+
+ if (!r_next) {
+ free(route);
+ return NULL;
+ }
+
+ iface = r_next->iface;
+ memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
+ route->mtu = r_next->mtu;
+ route->metric = r_next->metric;
+
+done:
+ route->iface = iface;
+ if (defaultroute_target)
+ free(route);
+ else
+ vlist_add(&iface->host_routes, &route->node, &route->flags);
+ return iface;
+}
+
void
interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
{
if (!route)
return;
+ route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
route->mask = v6 ? 128 : 32;
if ((cur = tb[ROUTE_MASK]) != NULL) {
route->mask = parse_netmask_string(blobmsg_data(cur), v6);
}
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;
}
DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
goto error;
}
- } else {
- route->flags |= DEVADDR_DEVICE;
}
- if ((cur = tb[ROUTE_METRIC]) != NULL)
+ if ((cur = tb[ROUTE_METRIC]) != NULL) {
route->metric = blobmsg_get_u32(cur);
+ 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->mask);
+ vlist_add(&ip->route, &route->node, &route->flags);
return;
error:
addr_cmp(const void *k1, const void *k2, void *ptr)
{
return memcmp(k1, k2, sizeof(struct device_addr) -
- offsetof(struct device_addr, mask));
+ offsetof(struct device_addr, flags));
}
static int
route_cmp(const void *k1, const void *k2, void *ptr)
{
return memcmp(k1, k2, sizeof(struct device_route) -
- offsetof(struct device_route, mask));
+ 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
ip = container_of(tree, struct interface_ip_settings, addr);
iface = ip->iface;
- dev = iface->l3_dev->dev;
+ dev = iface->l3_dev.dev;
if (node_new) {
a_new = container_of(node_new, struct device_addr, node);
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 (node_new) {
- if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep)
- system_add_address(dev, a_new);
a_new->enabled = true;
+ if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) {
+ system_add_address(dev, a_new);
+ if (iface->metric)
+ interface_handle_subnet_route(iface, a_new, true);
+ }
}
}
if (ip->no_defaultroute && !route->mask)
return false;
- return true;
+ return ip->enabled;
}
static void
ip = container_of(tree, struct interface_ip_settings, route);
iface = ip->iface;
- dev = iface->l3_dev->dev;
+ dev = iface->l3_dev.dev;
route_old = container_of(node_old, struct device_route, node);
route_new = container_of(node_new, struct device_route, node);
if (node_new) {
bool _enabled = enable_route(ip, route_new);
+ if (!(route_new->flags & DEVROUTE_METRIC))
+ route_new->metric = iface->metric;
+
if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
system_add_route(dev, route_new);
+ route_new->iface = iface;
route_new->enabled = _enabled;
}
}
+static void
+interface_update_host_route(struct vlist_tree *tree,
+ struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct interface *iface;
+ struct device *dev;
+ struct device_route *route_old, *route_new;
+
+ iface = container_of(tree, struct interface, host_routes);
+ dev = iface->l3_dev.dev;
+
+ route_old = container_of(node_old, struct device_route, node);
+ route_new = container_of(node_new, struct device_route, node);
+
+ if (node_old) {
+ system_del_route(dev, route_old);
+ free(route_old);
+ }
+
+ if (node_new)
+ 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;
fprintf(f, "# Interface %s\n", iface->name);
write_resolv_conf_entries(f, &iface->config_ip);
- write_resolv_conf_entries(f, &iface->proto_ip);
+ if (!iface->proto_ip.no_dns)
+ write_resolv_conf_entries(f, &iface->proto_ip);
}
fclose(f);
if (rename(path, resolv_conf) < 0) {
struct device *dev;
ip->enabled = enabled;
- dev = ip->iface->l3_dev->dev;
+ dev = ip->iface->l3_dev.dev;
if (!dev)
return;
if (route->enabled == _enabled)
continue;
- if (_enabled)
+ if (_enabled) {
+ if (!(route->flags & DEVROUTE_METRIC))
+ route->metric = ip->iface->metric;
+
system_add_route(dev, route);
- else
+ } else
system_del_route(dev, route);
route->enabled = _enabled;
}
void
interface_ip_update_start(struct interface_ip_settings *ip)
{
- vlist_simple_update(&ip->dns_servers);
- vlist_simple_update(&ip->dns_search);
+ if (ip != &ip->iface->config_ip) {
+ vlist_simple_update(&ip->dns_servers);
+ vlist_simple_update(&ip->dns_search);
+ }
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
interface_ip_flush(struct interface_ip_settings *ip)
{
+ if (ip == &ip->iface->proto_ip)
+ vlist_flush_all(&ip->iface->host_routes);
vlist_simple_flush_all(&ip->dns_servers);
vlist_simple_flush_all(&ip->dns_search);
vlist_flush_all(&ip->route);
vlist_flush_all(&ip->addr);
+ vlist_flush_all(&ip->prefix);
}
-void
-interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
+static void
+__interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
{
ip->iface = iface;
ip->enabled = true;
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
+interface_ip_init(struct interface *iface)
+{
+ __interface_ip_init(&iface->proto_ip, iface);
+ __interface_ip_init(&iface->config_ip, iface);
+ vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
}
projects / project / netifd.git / blobdiff