+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2012 Steven Barth <steven@midlink.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>
#include <unistd.h>
+#include <limits.h>
#include <arpa/inet.h>
#include "netifd.h"
ROUTE_TARGET,
ROUTE_MASK,
ROUTE_GATEWAY,
- ROUTE_DEVICE,
ROUTE_METRIC,
ROUTE_MTU,
+ ROUTE_VALID,
+ ROUTE_TABLE,
__ROUTE_MAX
};
[ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
[ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
[ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
- [ROUTE_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
[ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
[ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
+ [ROUTE_TABLE] = { .name = "table", .type = BLOBMSG_TYPE_STRING },
+ [ROUTE_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
};
-const struct config_param_list route_attr_list = {
+const struct uci_blob_param_list route_attr_list = {
.n_params = __ROUTE_MAX,
.params = route_attr,
};
+
+struct list_head prefixes = LIST_HEAD_INIT(prefixes);
+static struct device_prefix *ula_prefix = NULL;
+static struct uloop_timeout valid_until_timeout;
+
+
+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 int set_ip_source_policy(bool add, bool v6, unsigned int priority,
+ const union if_addr *addr, uint8_t mask, struct interface *iface,
+ struct interface *in_iface, const char *action)
+{
+ struct iprule rule = {
+ .flags = IPRULE_PRIORITY,
+ .priority = priority
+ };
+
+ if (addr) {
+ rule.flags |= IPRULE_SRC;
+ rule.src_addr = *addr;
+ rule.src_mask = mask;
+ }
+
+ if (iface) {
+ rule.flags |= IPRULE_LOOKUP;
+ rule.lookup = (v6) ? iface->ip6table : iface->ip4table;
+
+ if (!rule.lookup)
+ return 0;
+ } else if (action) {
+ rule.flags |= IPRULE_ACTION;
+ system_resolve_iprule_action(action, &rule.action);
+ }
+
+ if (in_iface && in_iface->l3_dev.dev) {
+ rule.flags |= IPRULE_IN;
+ strcpy(rule.in_dev, in_iface->l3_dev.dev->ifname);
+ }
+
+ rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
+
+ return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
+}
+
+static int set_ip_lo_policy(bool add, bool v6, struct interface *iface)
+{
+ struct iprule rule = {
+ .flags = IPRULE_IN | IPRULE_LOOKUP | IPRULE_PRIORITY,
+ .priority = IPRULE_PRIORITY_NW + iface->l3_dev.dev->ifindex,
+ .lookup = (v6) ? iface->ip6table : iface->ip4table,
+ .in_dev = "lo"
+ };
+
+ if (!rule.lookup)
+ return 0;
+
+ rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
+
+ return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
+}
+
+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;
+
+ // Handle offlink addresses correctly
+ unsigned int mask = addr->mask;
+ if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
+ (addr->flags & DEVADDR_OFFLINK))
+ mask = 128;
+
+ if (!match_if_addr(&addr->addr, a, 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 (route->flags & DEVROUTE_TABLE)
+ 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);
+
+ if (iface) {
+ /* 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);
+ } else {
+ 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;
+ route->table = r_next->table;
+
+done:
+ route->iface = iface;
+ if (defaultroute_target)
+ free(route);
+ else
+ vlist_add(&iface->host_routes, &route->node, route);
+ return iface;
+}
+
void
interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
{
struct blob_attr *tb[__ROUTE_MAX], *cur;
struct device_route *route;
int af = v6 ? AF_INET6 : AF_INET;
- bool config = false;
+ bool is_proto_route = !!iface;
blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
- if (!tb[ROUTE_GATEWAY] && !tb[ROUTE_DEVICE])
- return;
-
if (!iface) {
if ((cur = tb[ROUTE_INTERFACE]) == NULL)
return;
return;
ip = &iface->config_ip;
- config = true;
} else {
ip = &iface->proto_ip;
}
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;
}
}
}
- if ((cur = tb[ROUTE_METRIC]) != NULL)
+ if ((cur = tb[ROUTE_METRIC]) != NULL) {
route->metric = blobmsg_get_u32(cur);
- else
- route->metric = -1;
+ 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;
+ }
+
+ // Use source-based routing
+ if (is_proto_route) {
+ route->table = (v6) ? iface->ip6table : iface->ip4table;
+ route->flags |= DEVROUTE_SRCTABLE;
+ }
- if (!config && (cur = tb[ROUTE_DEVICE]) != NULL)
- route->device = device_get(blobmsg_data(cur), true);
+ if ((cur = tb[ROUTE_TABLE]) != NULL) {
+ if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
+ DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
+ goto error;
+ }
+
+ if (route->table)
+ route->flags |= DEVROUTE_TABLE;
+ }
- vlist_add(&ip->route, &route->node);
+ if ((cur = tb[ROUTE_VALID]) != NULL) {
+ int64_t valid = blobmsg_get_u32(cur);
+ int64_t valid_until = valid + (int64_t)system_get_rtime();
+ if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
+ route->valid_until = valid_until;
+ }
+
+ vlist_add(&ip->route, &route->node, route);
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));
+ const struct device_route *r1 = k1, *r2 = k2;
+
+ if (r1->mask != r2->mask)
+ return r2->mask - r1->mask;
+
+ if (r1->metric != r2->metric)
+ return r1->metric - r2->metric;
+
+ if (r1->flags != r2->flags)
+ return r2->flags - r1->flags;
+
+ return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
+}
+
+static int
+prefix_cmp(const void *k1, const void *k2, void *ptr)
+{
+ return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
+ 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);
+
+ if (!(addr->flags & DEVADDR_OFFLINK)) {
+ route.flags &= ~DEVADDR_KERNEL;
+ route.metric = iface->metric;
+ system_add_route(dev, &route);
+ }
+ } else {
+ if (!(addr->flags & DEVADDR_OFFLINK))
+ system_del_route(dev, &route);
+ }
}
static void
struct interface_ip_settings *ip;
struct interface *iface;
struct device *dev;
- struct device_addr *addr;
+ struct device_addr *a_new = NULL, *a_old = NULL;
+ bool replace = false;
bool keep = false;
+ bool v6 = false;
ip = container_of(tree, struct interface_ip_settings, addr);
iface = ip->iface;
- dev = iface->l3_dev->dev;
+ dev = iface->l3_dev.dev;
- if (node_old && node_new)
+ if (node_new) {
+ a_new = container_of(node_new, struct device_addr, node);
+
+ if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
+ !a_new->broadcast) {
+
+ uint32_t mask = ~0;
+ uint32_t *a = (uint32_t *) &a_new->addr;
+
+ mask >>= a_new->mask;
+ a_new->broadcast = *a | htonl(mask);
+ }
+ }
+
+ if (node_old)
+ a_old = container_of(node_old, struct device_addr, node);
+
+ if (a_new && a_old) {
keep = true;
+ if (a_old->flags != a_new->flags)
+ keep = false;
+
+ if (a_old->valid_until != a_new->valid_until ||
+ a_old->preferred_until != a_new->preferred_until)
+ replace = true;
+
+ if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
+ a_new->broadcast != a_old->broadcast)
+ keep = false;
+ }
+
if (node_old) {
- addr = container_of(node_old, struct device_addr, node);
- if (!(addr->flags & DEVADDR_EXTERNAL) && addr->enabled && !keep)
- system_del_address(dev, addr);
- free(addr);
+ if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep) {
+ interface_handle_subnet_route(iface, a_old, false);
+
+ if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
+ v6 = true;
+
+ //This is needed for source routing to work correctly. If a device
+ //has two connections to a network using the same subnet, adding
+ //only the network-rule will cause packets to be routed through the
+ //first matching network (source IP matches both masks).
+ set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
+ (v6) ? 128 : 32, iface, NULL, NULL);
+ set_ip_source_policy(false, v6, IPRULE_PRIORITY_NW, &a_old->addr,
+ a_old->mask, iface, NULL, NULL);
+
+ system_del_address(dev, a_old);
+ }
+ free(a_old);
}
if (node_new) {
- addr = container_of(node_new, struct device_addr, node);
- if (!(addr->flags & DEVADDR_EXTERNAL) && !keep)
- system_add_address(dev, addr);
- addr->enabled = true;
+ a_new->enabled = true;
+ if (!(a_new->flags & DEVADDR_EXTERNAL) && (!keep || replace)) {
+ system_add_address(dev, a_new);
+
+ if (!keep) {
+ if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
+ v6 = true;
+
+ set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
+ (v6) ? 128 : 32, iface, NULL, NULL);
+ set_ip_source_policy(true, v6, IPRULE_PRIORITY_NW, &a_new->addr,
+ a_new->mask, iface, NULL, NULL);
+ }
+
+ if ((a_new->flags & DEVADDR_OFFLINK) || 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 device_prefix_assignment *assignment,
+ const struct device_prefix *prefix, struct interface *iface, bool add)
+{
+ const struct interface *uplink = 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 = prefix->addr;
+ addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
+ addr.addr.in6.s6_addr[15] += 1;
+ addr.mask = assignment->length;
+ addr.flags = DEVADDR_INET6;
+ addr.preferred_until = prefix->preferred_until;
+ addr.valid_until = prefix->valid_until;
+
+ if (!add && assignment->enabled) {
+ time_t now = system_get_rtime();
+ addr.preferred_until = now;
+ if (!addr.valid_until || addr.valid_until - now > 7200)
+ addr.valid_until = now + 7200;
+ system_add_address(l3_downlink, &addr);
+ if (prefix->iface) {
+ set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
+ addr.mask, prefix->iface, iface, NULL);
+
+ set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
+ addr.mask, NULL, iface, "unreachable");
+ }
+
+ assignment->enabled = false;
+ } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
+ system_add_address(l3_downlink, &addr);
+ if (prefix->iface && !assignment->enabled) {
+ set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
+ addr.mask, NULL, iface, "unreachable");
+
+ set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
+ addr.mask, prefix->iface, iface, NULL);
+ }
+ 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 = true;
+ }
+}
+
+static bool interface_prefix_assign(struct list_head *list,
+ struct device_prefix_assignment *assign)
+{
+ int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
+ struct device_prefix_assignment *c;
+ list_for_each_entry(c, list, head) {
+ if (assign->assigned != -1) {
+ if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
+ list_add_tail(&assign->head, &c->head);
+ return true;
+ }
+ } else if (assign->assigned == -1) {
+ current = (current + asize) & (~asize);
+ if (current + asize < c->assigned) {
+ assign->assigned = current;
+ list_add_tail(&assign->head, &c->head);
+ return true;
+ }
+ }
+ current = (c->assigned + (1 << (64 - c->length)));
+ }
+ return false;
+}
+
+static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
+{
+ struct device_prefix_assignment *c;
+ struct interface *iface;
+
+ // Delete all assignments
+ while (!list_empty(&prefix->assignments)) {
+ c = list_first_entry(&prefix->assignments,
+ struct device_prefix_assignment, head);
+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
+ interface_set_prefix_address(c, prefix, iface, false);
+ list_del(&c->head);
+ free(c);
+ }
+
+ if (!setup)
+ return;
+
+ // End-of-assignment sentinel
+ c = malloc(sizeof(*c) + 1);
+ c->assigned = 1 << (64 - prefix->length);
+ c->length = 64;
+ c->name[0] = 0;
+ list_add(&c->head, &prefix->assignments);
+
+ // Excluded prefix
+ if (prefix->excl_length > 0) {
+ const char name[] = "!excluded";
+ c = malloc(sizeof(*c) + sizeof(name));
+ c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
+ ((1 << (64 - prefix->length)) - 1);
+ c->length = prefix->excl_length;
+ memcpy(c->name, name, sizeof(name));
+ list_add(&c->head, &prefix->assignments);
+ }
+
+ bool assigned_any = false;
+ struct list_head assign_later = LIST_HEAD_INIT(assign_later);
+ vlist_for_each_element(&interfaces, iface, node) {
+ if (iface->assignment_length < 48 ||
+ iface->assignment_length > 64)
+ continue;
+
+ // Test whether there is a matching class
+ if (!list_empty(&iface->assignment_classes)) {
+ bool found = false;
+
+ struct interface_assignment_class *c;
+ list_for_each_entry(c, &iface->assignment_classes, head) {
+ if (!strcmp(c->name, prefix->pclass)) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ continue;
+ }
+
+ size_t namelen = strlen(iface->name) + 1;
+ c = malloc(sizeof(*c) + namelen);
+ c->length = iface->assignment_length;
+ c->assigned = iface->assignment_hint;
+ c->enabled = false;
+ memcpy(c->name, iface->name, namelen);
+
+ // First process all custom assignments, put all others in later-list
+ if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
+ if (c->assigned != -1) {
+ c->assigned = -1;
+ netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
+ "of size %hhu for %s, trying other\n", c->length, c->name);
+ }
+
+ struct list_head *next = &assign_later;
+ struct device_prefix_assignment *n;
+ list_for_each_entry(n, &assign_later, head) {
+ if (n->length < c->length) {
+ next = &n->head;
+ break;
+ }
+ }
+ list_add_tail(&c->head, next);
+ }
+
+ if (c->assigned != -1)
+ assigned_any = true;
+ }
+
+ // Then try to assign all other + failed custom assignments
+ while (!list_empty(&assign_later)) {
+ c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
+ list_del(&c->head);
+
+ bool assigned = false;
+ do {
+ assigned = interface_prefix_assign(&prefix->assignments, c);
+ } while (!assigned && ++c->length <= 64);
+
+ if (!assigned) {
+ netifd_log_message(L_WARNING, "Failed to assign subprefix "
+ "of size %hhu for %s\n", c->length, c->name);
+ free(c);
+ } else {
+ assigned_any = true;
+ }
+ }
+
+ list_for_each_entry(c, &prefix->assignments, head)
+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
+ interface_set_prefix_address(c, prefix, iface, true);
+
+ if (!assigned_any)
+ netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
+ "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
+}
+
+
+void interface_refresh_assignments(bool hint)
+{
+ static bool refresh = false;
+ if (!hint && refresh) {
+ struct device_prefix *p;
+ list_for_each_entry(p, &prefixes, head)
+ interface_update_prefix_assignments(p, true);
+ }
+ refresh = hint;
+}
+
+
+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;
+
+
+ struct device_prefix_assignment *c;
+ struct interface *iface;
+
+ if (node_old && node_new) {
+ // Move assignments and refresh addresses to update valid times
+ list_splice(&prefix_old->assignments, &prefix_new->assignments);
+
+ list_for_each_entry(c, &prefix_new->assignments, head)
+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
+ interface_set_prefix_address(c, prefix_new, iface, true);
+ } else if (node_new) {
+ // Set null-route to avoid routing loops
+ system_add_route(NULL, &route);
+ interface_update_prefix_assignments(prefix_new, true);
+ } else if (node_old) {
+ // Remove null-route
+ interface_update_prefix_assignments(prefix_old, false);
+ system_del_route(NULL, &route);
+ }
+
+ if (node_old) {
+ list_del(&prefix_old->head);
+ free(prefix_old);
+ }
+
+ if (node_new)
+ list_add(&prefix_new->head, &prefixes);
+
+}
+
+struct device_prefix*
+interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
+ uint8_t length, time_t valid_until, time_t preferred_until,
+ struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
+{
+ if (!pclass)
+ pclass = (iface) ? iface->name : "local";
+
+ struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
+ prefix->length = length;
+ prefix->addr = *addr;
+ prefix->preferred_until = preferred_until;
+ prefix->valid_until = valid_until;
+ prefix->iface = iface;
+ INIT_LIST_HEAD(&prefix->assignments);
+
+ if (excl_addr) {
+ prefix->excl_addr = *excl_addr;
+ prefix->excl_length = excl_length;
+ }
+
+ strcpy(prefix->pclass, pclass);
+
+ if (iface)
+ vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
+ else
+ interface_update_prefix(NULL, &prefix->node, NULL);
+
+ return prefix;
+}
+
+void
+interface_ip_set_ula_prefix(const char *prefix)
+{
+ char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
+ if (prefix)
+ 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) {
+ if (ula_prefix) {
+ interface_update_prefix(NULL, NULL, &ula_prefix->node);
+ ula_prefix = NULL;
+ }
+ 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) {
+ if (ula_prefix)
+ interface_update_prefix(NULL, NULL, &ula_prefix->node);
+
+ ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
+ 0, 0, NULL, 0, NULL);
+ }
+}
+
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;
struct dns_server *s;
struct dns_search_domain *d;
const char *str;
- char buf[32];
+ char buf[INET6_ADDRSTRLEN];
vlist_simple_for_each_element(&ip->dns_servers, s, node) {
str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
struct interface *iface;
char *path = alloca(strlen(resolv_conf) + 5);
FILE *f;
+ uint32_t crcold, crcnew;
sprintf(path, "%s.tmp", resolv_conf);
unlink(path);
- f = fopen(path, "w");
+ f = fopen(path, "w+");
if (!f) {
D(INTERFACE, "Failed to open %s for writing\n", path);
return;
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);
}
+ fflush(f);
+ rewind(f);
+ crcnew = crc32_file(f);
fclose(f);
- if (rename(path, resolv_conf) < 0) {
+
+ crcold = crcnew + 1;
+ f = fopen(resolv_conf, "r");
+ if (f) {
+ crcold = crc32_file(f);
+ fclose(f);
+ }
+
+ if (crcold == crcnew) {
+ unlink(path);
+ } else if (rename(path, resolv_conf) < 0) {
D(INTERFACE, "Failed to replace %s\n", resolv_conf);
unlink(path);
}
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;
}
+
+ struct device_prefix *c;
+ struct device_prefix_assignment *a;
+ list_for_each_entry(c, &prefixes, head)
+ list_for_each_entry(a, &c->assignments, head)
+ if (!strcmp(a->name, ip->iface->name))
+ interface_set_prefix_address(a, c, ip->iface, enabled);
+
+ if (ip->iface && ip->iface->l3_dev.dev) {
+ set_ip_lo_policy(enabled, true, ip->iface);
+ set_ip_lo_policy(enabled, false, ip->iface);
+
+ set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
+ NULL, 0, NULL, ip->iface, "failed_policy");
+ }
}
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_search, struct dns_search_domain, node);
vlist_simple_init(&ip->dns_servers, struct dns_server, node);
- vlist_init(&ip->route, route_cmp, interface_update_proto_route,
- struct device_route, node, mask);
- vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr,
- struct device_addr, node, mask);
+ 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);
+
+}
+
+static void
+interface_ip_valid_until_handler(struct uloop_timeout *t)
+{
+ time_t now = system_get_rtime();
+ struct interface *iface;
+ vlist_for_each_element(&interfaces, iface, node) {
+ if (iface->state != IFS_UP)
+ continue;
+
+ struct device_addr *addr, *addrp;
+ struct device_route *route, *routep;
+ struct device_prefix *pref, *prefp;
+
+ vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
+ if (addr->valid_until && addr->valid_until < now)
+ vlist_delete(&iface->proto_ip.addr, &addr->node);
+
+ vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
+ if (route->valid_until && route->valid_until < now)
+ vlist_delete(&iface->proto_ip.route, &route->node);
+
+ vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
+ if (pref->valid_until && pref->valid_until < now)
+ vlist_delete(&iface->proto_ip.prefix, &pref->node);
+
+ }
+
+ uloop_timeout_set(t, 1000);
+}
+
+static void __init
+interface_ip_init_worker(void)
+{
+ valid_until_timeout.cb = interface_ip_valid_until_handler;
+ uloop_timeout_set(&valid_until_timeout, 1000);
}
projects / project / netifd.git / blobdiff