#include <stdio.h>
#include <unistd.h>
+#include <limits.h>
#include <arpa/inet.h>
#include "netifd.h"
[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,
};
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)
{
if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
continue;
- if (!match_if_addr(&addr->addr, a, addr->mask))
+ // 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;
}
struct interface *
-interface_ip_add_target_route(union if_addr *addr, bool v6)
+interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
{
- struct interface *iface;
struct device_route *route, *r_next = NULL;
bool defaultroute_target = false;
int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
else
memcpy(&route->addr, addr, addrsize);
- vlist_for_each_element(&interfaces, iface, node) {
+ 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) {
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;
struct blob_attr *tb[__ROUTE_MAX], *cur;
struct device_route *route;
int af = v6 ? AF_INET6 : AF_INET;
+ bool is_proto_route = !!iface;
blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
route->flags |= DEVROUTE_MTU;
}
+ // Use source-based routing
+ if (is_proto_route) {
+ route->table = (v6) ? iface->ip6table : iface->ip4table;
+ route->flags |= DEVROUTE_SRCTABLE;
+ }
+
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));
route->flags |= DEVROUTE_TABLE;
}
- if ((cur = tb[ROUTE_VALID]) != NULL)
- route->valid_until = system_get_rtime() + blobmsg_get_u32(cur);
+ 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;
static int
prefix_cmp(const void *k1, const void *k2, void *ptr)
{
- return memcmp(k1, k2, sizeof(struct device_prefix) -
+ return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
offsetof(struct device_prefix, addr));
}
struct device *dev;
struct device_addr *a_new = NULL, *a_old = NULL;
bool keep = false;
+ bool v6 = false;
ip = container_of(tree, struct interface_ip_settings, addr);
iface = ip->iface;
if (node_old) {
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);
a_new->enabled = true;
if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) {
system_add_address(dev, a_new);
+
+ 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);
}
static void
interface_set_prefix_address(struct device_prefix_assignment *assignment,
- const struct device_prefix *prefix, struct interface *iface, bool add);
-
-static void interface_trigger_ula_prefix(struct interface *iface,
- const struct device_prefix *prefix, bool enable)
-{
- if (prefix == ula_prefix || (prefix->addr.s6_addr[0] & 0xfe) != 0xfc)
- return;
-
- bool external_ula = false;
- struct device_prefix_assignment *ula_assign = NULL;
- struct device_prefix *c;
- list_for_each_entry(c, &prefixes, head) {
- if (c != ula_prefix && (c->addr.s6_addr[0] & 0xfe) != 0xfc)
- continue;
-
- struct device_prefix_assignment *a;
- list_for_each_entry(a, &c->assignments, head) {
- if (!strcmp(a->name, iface->name)) {
- if (c == ula_prefix)
- ula_assign = a;
- else if (a->enabled)
- external_ula = true;
- }
- }
-
- }
-
- // Remove ULA assignment if there is an externally managed ULA and vice versa
- if (ula_assign && ((enable && !external_ula) || (!enable && external_ula)))
- interface_set_prefix_address(ula_assign, ula_prefix, iface, enable);
-}
-
-
-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 (!addr.valid_until || addr.valid_until - now > 7200)
addr.valid_until = now + 7200;
system_add_address(l3_downlink, &addr);
- assignment->enabled = false;
+ 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");
+ }
- interface_trigger_ula_prefix(iface, prefix, true);
+ 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);
system_update_ipv6_mtu(l3_downlink, mtu);
}
assignment->enabled = true;
-
- interface_trigger_ula_prefix(iface, prefix, false);
}
}
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->config_ip.assignment_length < 48 ||
- iface->config_ip.assignment_length > 64)
+ 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->config_ip.assignment_length;
- c->assigned = iface->config_ip.assignment_hint;
+ c->length = iface->assignment_length;
+ c->assigned = iface->assignment_hint;
c->enabled = false;
memcpy(c->name, iface->name, namelen);
netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
"of size %hhu for %s, trying other\n", c->length, c->name);
}
- list_add_tail(&c->head, &assign_later);
+
+ 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);
- if (!interface_prefix_assign(&prefix->assignments, c)) {
+
+ 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?");
}
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;
} 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) {
- interface_update_prefix_assignments(prefix_old, false);
-
// Remove null-route
+ interface_update_prefix_assignments(prefix_old, false);
system_del_route(NULL, &route);
}
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)
+ struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
{
- struct device_prefix *prefix = calloc(1, sizeof(*prefix));
+ 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->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, NULL, &ula_prefix->node);
ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
- 0, 0, NULL, 0);
+ 0, 0, NULL, 0, NULL);
}
}
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
projects / project / netifd.git / blobdiff