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@@ -449,10 +449,10 @@ interface_update_host_route(struct vlist_tree *tree,
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static void
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-interface_set_prefix_address(struct interface *iface, bool add,
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- struct device_prefix_assignment *assignment)
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+interface_set_prefix_address(struct device_prefix_assignment *assignment,
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+ const struct device_prefix *prefix, struct interface *iface, bool add)
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{
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- struct interface *uplink = assignment->prefix->iface;
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+ const struct interface *uplink = prefix->iface;
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if (!iface->l3_dev.dev)
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return;
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@@ -460,113 +460,146 @@ interface_set_prefix_address(struct interface *iface, bool add,
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struct device_addr addr;
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memset(&addr, 0, sizeof(addr));
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- addr.addr.in6 = assignment->addr;
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+ addr.addr.in6 = prefix->addr;
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+ addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
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+ addr.addr.in6.s6_addr[15] += 1;
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addr.mask = assignment->length;
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addr.flags = DEVADDR_INET6;
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- addr.preferred_until = assignment->prefix->preferred_until;
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- addr.valid_until = assignment->prefix->valid_until;
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-
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- if (!add) {
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- if (assignment->enabled) {
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- time_t now = system_get_rtime();
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- addr.preferred_until = now;
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- if (!addr.valid_until || addr.valid_until - now > 7200)
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- addr.valid_until = now + 7200;
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- system_add_address(l3_downlink, &addr);
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- }
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- } else {
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+ addr.preferred_until = prefix->preferred_until;
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+ addr.valid_until = prefix->valid_until;
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+
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+ if (!add && assignment->enabled) {
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+ time_t now = system_get_rtime();
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+ addr.preferred_until = now;
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+ if (!addr.valid_until || addr.valid_until - now > 7200)
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+ addr.valid_until = now + 7200;
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+ system_add_address(l3_downlink, &addr);
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+ assignment->enabled = false;
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+ } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
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system_add_address(l3_downlink, &addr);
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-
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if (uplink && uplink->l3_dev.dev) {
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int mtu = system_update_ipv6_mtu(
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uplink->l3_dev.dev, 0);
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if (mtu > 0)
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system_update_ipv6_mtu(l3_downlink, mtu);
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}
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+ assignment->enabled = true;
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+ }
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+}
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+
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+static bool interface_prefix_assign(struct list_head *list,
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+ struct device_prefix_assignment *assign)
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+{
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+ int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
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+ struct device_prefix_assignment *c;
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+ list_for_each_entry(c, list, head) {
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+ if (assign->assigned != -1) {
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+ if (assign->assigned > current && assign->assigned + asize < c->assigned) {
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+ list_add_tail(&assign->head, &c->head);
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+ return true;
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+ }
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+ } else if (assign->assigned == -1) {
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+ current = (current + asize) & (~asize);
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+ if (current + asize < c->assigned) {
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+ assign->assigned = current;
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+ list_add_tail(&assign->head, &c->head);
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+ return true;
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+ }
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+ }
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+ current = (c->assigned + (1 << (64 - c->length)));
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}
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- assignment->enabled = add;
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+ return false;
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}
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-
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-static void
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-interface_update_prefix_assignments(struct vlist_tree *tree,
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- struct vlist_node *node_new,
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- struct vlist_node *node_old)
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+static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
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{
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- struct device_prefix_assignment *old, *new;
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- old = container_of(node_old, struct device_prefix_assignment, node);
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- new = container_of(node_new, struct device_prefix_assignment, node);
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-
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- // Assignments persist across interface reloads etc.
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- // so use indirection to avoid dangling pointers
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- struct interface *iface = vlist_find(&interfaces,
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- (node_new) ? new->name : old->name, iface, node);
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-
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- if (node_old && node_new) {
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- new->addr = old->addr;
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- new->length = old->length;
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- } else if (node_old) {
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- if (iface)
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- interface_set_prefix_address(iface, false, old);
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- free(old);
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- } else if (node_new) {
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- struct device_prefix *prefix = new->prefix;
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- uint64_t want = 1ULL << (64 - new->length);
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- prefix->avail &= ~(want - 1);
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- prefix->avail -= want;
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-
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- // Invert assignment
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- uint64_t assigned = ~prefix->avail;
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- assigned &= (1ULL << (64 - prefix->length)) - 1;
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- assigned &= ~(want - 1);
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+ struct device_prefix_assignment *c;
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+ struct interface *iface;
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- // Assignment
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- new->addr = prefix->addr;
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- new->addr.s6_addr32[0] |=
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- htonl(assigned >> 32);
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- new->addr.s6_addr32[1] |=
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- htonl(assigned & 0xffffffffU);
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- new->addr.s6_addr[15] += 1;
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+ // Delete all assignments
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+ while (!list_empty(&prefix->assignments)) {
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+ c = list_first_entry(&prefix->assignments,
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+ struct device_prefix_assignment, head);
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+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
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+ interface_set_prefix_address(c, prefix, iface, false);
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+ list_del(&c->head);
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+ free(c);
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}
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- if (node_new && (iface->state == IFS_UP || iface->state == IFS_SETUP))
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- interface_set_prefix_address(iface, true, new);
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-}
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-
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+ if (!setup)
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+ return;
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-void
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-interface_ip_set_prefix_assignment(struct device_prefix *prefix,
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- struct interface *iface, uint8_t length)
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-{
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- struct device_prefix_assignment *assignment;
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+ // End-of-assignment sentinel
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+ c = malloc(sizeof(*c) + 1);
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+ c->assigned = 1 << (64 - prefix->length);
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+ c->length = 64;
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+ c->name[0] = 0;
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+ list_add(&c->head, &prefix->assignments);
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+
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+ // Excluded prefix
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+ if (prefix->excl_length > 0) {
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+ const char name[] = "!excluded";
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+ c = malloc(sizeof(*c) + sizeof(name));
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+ c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
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+ ((1 << (64 - prefix->length)) - 1);
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+ c->length = prefix->excl_length;
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+ memcpy(c->name, name, sizeof(name));
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+ list_add(&c->head, &prefix->assignments);
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+ }
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+
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+ struct list_head assign_later = LIST_HEAD_INIT(assign_later);
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+ vlist_for_each_element(&interfaces, iface, node) {
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+ if (iface->config_ip.assignment_length < 48 ||
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+ iface->config_ip.assignment_length > 64)
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+ continue;
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- if (!length || length > 64) {
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- assignment = vlist_find(prefix->assignments, iface->name, assignment, node);
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- if (assignment)
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- interface_set_prefix_address(iface, false, assignment);
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- } else {
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- uint64_t want = 1ULL << (64 - length);
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- char *name;
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+ size_t namelen = strlen(iface->name) + 1;
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+ c = malloc(sizeof(*c) + namelen);
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+ c->length = iface->config_ip.assignment_length;
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+ c->assigned = iface->config_ip.assignment_hint;
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+ c->enabled = false;
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+ memcpy(c->name, iface->name, namelen);
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+
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+ // First process all custom assignments, put all others in later-list
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+ if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
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+ if (c->assigned != -1) {
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+ c->assigned = -1;
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+ netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
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+ "of size %hhu for %s, trying other\n", c->length, c->name);
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+ }
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+ list_add_tail(&c->head, &assign_later);
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+ }
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+ }
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- if (prefix->avail < want && prefix->avail > 0) {
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- do {
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- want = 1ULL << (64 - ++length);
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- } while (want > prefix->avail);
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+ // Then try to assign all other + failed custom assignments
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+ while (!list_empty(&assign_later)) {
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+ c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
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+ list_del(&c->head);
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+ if (!interface_prefix_assign(&prefix->assignments, c)) {
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+ netifd_log_message(L_WARNING, "Failed to assign subprefix "
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+ "of size %hhu for %s\n", c->length, c->name);
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+ free(c);
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}
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+ }
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- if (prefix->avail < want)
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- return;
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+ list_for_each_entry(c, &prefix->assignments, head)
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+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
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+ interface_set_prefix_address(c, prefix, iface, true);
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+}
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- assignment = calloc_a(sizeof(*assignment),
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- &name, strlen(iface->name) + 1);
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- assignment->prefix = prefix;
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- assignment->length = length;
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- assignment->name = strcpy(name, iface->name);
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- vlist_add(prefix->assignments, &assignment->node, assignment->name);
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+void interface_refresh_assignments(bool hint)
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+{
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+ static bool refresh = false;
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+ if (!hint && refresh) {
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+ struct device_prefix *p;
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+ list_for_each_entry(p, &prefixes, head)
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+ interface_update_prefix_assignments(p, true);
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}
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+ refresh = hint;
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}
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+
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static void
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interface_update_prefix(struct vlist_tree *tree,
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struct vlist_node *node_new,
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@@ -583,55 +616,43 @@ interface_update_prefix(struct vlist_tree *tree,
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route.mask = (node_new) ? prefix_new->length : prefix_old->length;
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route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
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- if (node_old && node_new) {
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- prefix_new->avail = prefix_old->avail;
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- prefix_new->assignments = prefix_old->assignments;
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- prefix_old->assignments = NULL;
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-
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- // Update all assignments
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- struct device_prefix_assignment *assignment;
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- struct vlist_tree *assignments = prefix_new->assignments;
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- vlist_for_each_element(assignments, assignment, node) {
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- assignment->prefix = prefix_new;
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- assignments->update(assignments,
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- &assignment->node, &assignment->node);
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- }
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- } else if (node_new) {
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- prefix_new->avail = 1ULL << (64 - prefix_new->length);
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- prefix_new->assignments = calloc(1, sizeof(*prefix_new->assignments));
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- vlist_init(prefix_new->assignments, avl_strcmp,
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- interface_update_prefix_assignments);
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+ struct device_prefix_assignment *c;
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+ struct interface *iface;
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- // Create initial assignments for interfaces
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- struct interface *iface;
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- vlist_for_each_element(&interfaces, iface, node)
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- interface_ip_set_prefix_assignment(prefix_new, iface,
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- iface->proto_ip.assignment_length);
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+ if (node_old && node_new) {
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+ // Move assignments and refresh addresses to update valid times
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+ list_splice_init(&prefix_old->assignments, &prefix_new->assignments);
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+ list_for_each_entry(c, &prefix_new->assignments, head)
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+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
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+ interface_set_prefix_address(c, prefix_new, iface, true);
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+ } else if (node_new) {
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// Set null-route to avoid routing loops
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system_add_route(NULL, &route);
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- }
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- if (node_old) {
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+ INIT_LIST_HEAD(&prefix_new->assignments);
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+ interface_update_prefix_assignments(prefix_new, true);
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+ } else if (node_old) {
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+ interface_update_prefix_assignments(prefix_old, false);
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+
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// Remove null-route
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system_del_route(NULL, &route);
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+ }
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+ if (node_old) {
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list_del(&prefix_old->head);
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-
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- if (prefix_old->assignments) {
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- vlist_flush_all(prefix_old->assignments);
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- free(prefix_old->assignments);
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- }
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free(prefix_old);
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}
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if (node_new)
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list_add(&prefix_new->head, &prefixes);
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+
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}
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struct device_prefix*
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interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
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- uint8_t length, time_t valid_until, time_t preferred_until)
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+ uint8_t length, time_t valid_until, time_t preferred_until,
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+ struct in6_addr *excl_addr, uint8_t excl_length)
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{
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struct device_prefix *prefix = calloc(1, sizeof(*prefix));
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prefix->length = length;
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@@ -640,6 +661,11 @@ interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
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prefix->valid_until = valid_until;
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prefix->iface = iface;
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+ if (excl_addr) {
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+ prefix->excl_addr = *excl_addr;
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+ prefix->excl_length = excl_length;
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+ }
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+
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if (iface)
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vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
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else
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@@ -675,7 +701,8 @@ interface_ip_set_ula_prefix(const char *prefix)
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if (ula_prefix)
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interface_update_prefix(NULL, NULL, &ula_prefix->node);
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- ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length, 0, 0);
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+ ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
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+ 0, 0, NULL, 0);
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}
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}
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@@ -866,6 +893,13 @@ void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
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system_del_route(dev, route);
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route->enabled = _enabled;
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}
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+
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+ struct device_prefix *c;
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+ struct device_prefix_assignment *a;
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+ list_for_each_entry(c, &prefixes, head)
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+ list_for_each_entry(a, &c->assignments, head)
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+ if (!strcmp(a->name, ip->iface->name))
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+ interface_set_prefix_address(a, c, ip->iface, enabled);
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}
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void
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