/*
* 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
ROUTE_METRIC,
ROUTE_MTU,
ROUTE_VALID,
+ ROUTE_TABLE,
__ROUTE_MAX
};
[ROUTE_GATEWAY] = { .name = "gateway", .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 },
};
if (!match_if_addr(&route->addr, a, route->mask))
continue;
+ if (route->flags & DEVROUTE_TABLE)
+ continue;
+
if (!*res || route->mask < (*res)->mask)
*res = route;
}
if (defaultroute_target)
free(route);
else
- vlist_add(&iface->host_routes, &route->node, &route->flags);
+ vlist_add(&iface->host_routes, &route->node, route);
return iface;
}
route->flags |= DEVROUTE_MTU;
}
+ 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;
+ }
+
if ((cur = tb[ROUTE_VALID]) != NULL)
route->valid_until = system_get_rtime() + blobmsg_get_u32(cur);
- vlist_add(&ip->route, &route->node, &route->flags);
+ vlist_add(&ip->route, &route->node, route);
return;
error:
static int
route_cmp(const void *k1, const void *k2, void *ptr)
{
- return memcmp(k1, k2, sizeof(struct device_route) -
- offsetof(struct device_route, flags));
+ 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
static void
-interface_set_prefix_address(struct interface *iface, bool add,
- struct device_prefix_assignment *assignment)
+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)
{
- struct interface *uplink = assignment->prefix->iface;
+ 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 (!iface->l3_dev.dev)
return;
struct device_addr addr;
memset(&addr, 0, sizeof(addr));
- addr.addr.in6 = assignment->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 = assignment->prefix->preferred_until;
- addr.valid_until = assignment->prefix->valid_until;
-
- if (!add) {
- if (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);
- }
- } else {
+ 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);
+ assignment->enabled = false;
+ interface_trigger_ula_prefix(iface, prefix, true);
+ } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
+ 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 = true;
+
+ interface_trigger_ula_prefix(iface, prefix, false);
}
- assignment->enabled = add;
}
-
-static void
-interface_update_prefix_assignments(struct vlist_tree *tree,
- struct vlist_node *node_new,
- struct vlist_node *node_old)
+static bool interface_prefix_assign(struct list_head *list,
+ struct device_prefix_assignment *assign)
{
- 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);
- } else if (node_new) {
- struct device_prefix *prefix = new->prefix;
- uint64_t want = 1ULL << (64 - new->length);
- prefix->avail &= ~(want - 1);
- prefix->avail -= want;
+ 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;
+}
- // Invert assignment
- uint64_t assigned = ~prefix->avail;
- assigned &= (1ULL << (64 - prefix->length)) - 1;
- assigned &= ~(want - 1);
+static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
+{
+ struct device_prefix_assignment *c;
+ struct interface *iface;
- // 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;
+ // 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 (node_new && (iface->state == IFS_UP || iface->state == IFS_SETUP))
- interface_set_prefix_address(iface, true, new);
-}
+ 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);
+ }
-void
-interface_ip_set_prefix_assignment(struct device_prefix *prefix,
- struct interface *iface, uint8_t length)
-{
- struct device_prefix_assignment *assignment;
+ 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)
+ continue;
- if (!length || length > 64) {
- assignment = vlist_find(prefix->assignments, iface->name, assignment, node);
- if (assignment)
- interface_set_prefix_address(iface, false, assignment);
- } else {
- uint64_t want = 1ULL << (64 - length);
- char *name;
+ 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->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);
+ }
+ list_add_tail(&c->head, &assign_later);
+ }
+ }
- if (prefix->avail < want && prefix->avail > 0) {
- do {
- want = 1ULL << (64 - ++length);
- } while (want > prefix->avail);
+ // 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)) {
+ netifd_log_message(L_WARNING, "Failed to assign subprefix "
+ "of size %hhu for %s\n", c->length, c->name);
+ free(c);
}
+ }
- if (prefix->avail < want)
- return;
+ 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);
+}
- assignment = calloc_a(sizeof(*assignment),
- &name, strlen(iface->name) + 1);
- assignment->prefix = prefix;
- assignment->length = length;
- assignment->name = strcpy(name, iface->name);
- vlist_add(prefix->assignments, &assignment->node, assignment->name);
+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,
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) {
- assignment->prefix = prefix_new;
- 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);
+ struct device_prefix_assignment *c;
+ struct interface *iface;
- // 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);
+ 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);
- }
- if (node_old) {
+ interface_update_prefix_assignments(prefix_new, true);
+ } else if (node_old) {
+ interface_update_prefix_assignments(prefix_old, false);
+
// Remove null-route
system_del_route(NULL, &route);
+ }
+ if (node_old) {
list_del(&prefix_old->head);
-
- if (prefix_old->assignments) {
- vlist_flush_all(prefix_old->assignments);
- free(prefix_old->assignments);
- }
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)
+ uint8_t length, time_t valid_until, time_t preferred_until,
+ struct in6_addr *excl_addr, uint8_t excl_length)
{
struct device_prefix *prefix = calloc(1, sizeof(*prefix));
prefix->length = length;
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;
+ }
if (iface)
vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
if (ula_prefix)
interface_update_prefix(NULL, NULL, &ula_prefix->node);
- ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length, 0, 0);
+ ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
+ 0, 0, NULL, 0);
}
}
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);
}
void
projects / project / netifd.git / blobdiff