diff options
| -rw-r--r-- | interface-ip.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/interface-ip.c b/interface-ip.c index bf7cf40..d18fa74 100644 --- a/interface-ip.c +++ b/interface-ip.c @@ -476,6 +476,41 @@ interface_update_host_route(struct vlist_tree *tree, 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; @@ -501,6 +536,8 @@ interface_set_prefix_address(struct device_prefix_assignment *assignment, 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) { @@ -510,6 +547,8 @@ interface_set_prefix_address(struct device_prefix_assignment *assignment, system_update_ipv6_mtu(l3_downlink, mtu); } assignment->enabled = true; + + interface_trigger_ula_prefix(iface, prefix, false); } } |