/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include "alloc-util.h" #include "firewall-util.h" #include "memory-util.h" #include "netlink-util.h" #include "networkd-address-pool.h" #include "networkd-address.h" #include "networkd-manager.h" #include "networkd-network.h" #include "parse-util.h" #include "string-util.h" #include "strv.h" #define ADDRESSES_PER_LINK_MAX 2048U #define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U int generate_ipv6_eui_64_address(const Link *link, struct in6_addr *ret) { assert(link); assert(ret); if (link->iftype == ARPHRD_INFINIBAND) { /* see RFC4391 section 8 */ memcpy(&ret->s6_addr[8], &link->hw_addr.addr.infiniband[12], 8); ret->s6_addr[8] ^= 1 << 1; return 0; } /* see RFC4291 section 2.5.1 */ ret->s6_addr[8] = link->hw_addr.addr.ether.ether_addr_octet[0]; ret->s6_addr[8] ^= 1 << 1; ret->s6_addr[9] = link->hw_addr.addr.ether.ether_addr_octet[1]; ret->s6_addr[10] = link->hw_addr.addr.ether.ether_addr_octet[2]; ret->s6_addr[11] = 0xff; ret->s6_addr[12] = 0xfe; ret->s6_addr[13] = link->hw_addr.addr.ether.ether_addr_octet[3]; ret->s6_addr[14] = link->hw_addr.addr.ether.ether_addr_octet[4]; ret->s6_addr[15] = link->hw_addr.addr.ether.ether_addr_octet[5]; return 0; } int address_new(Address **ret) { _cleanup_(address_freep) Address *address = NULL; address = new(Address, 1); if (!address) return -ENOMEM; *address = (Address) { .family = AF_UNSPEC, .scope = RT_SCOPE_UNIVERSE, .cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME, .cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME, .duplicate_address_detection = ADDRESS_FAMILY_IPV6, }; *ret = TAKE_PTR(address); return 0; } static int address_new_static(Network *network, const char *filename, unsigned section_line, Address **ret) { _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL; _cleanup_(address_freep) Address *address = NULL; int r; assert(network); assert(ret); assert(filename); assert(section_line > 0); r = network_config_section_new(filename, section_line, &n); if (r < 0) return r; address = ordered_hashmap_get(network->addresses_by_section, n); if (address) { *ret = TAKE_PTR(address); return 0; } if (ordered_hashmap_size(network->addresses_by_section) >= STATIC_ADDRESSES_PER_NETWORK_MAX) return -E2BIG; r = address_new(&address); if (r < 0) return r; address->network = network; address->section = TAKE_PTR(n); r = ordered_hashmap_ensure_allocated(&network->addresses_by_section, &network_config_hash_ops); if (r < 0) return r; r = ordered_hashmap_put(network->addresses_by_section, address->section, address); if (r < 0) return r; *ret = TAKE_PTR(address); return 0; } Address *address_free(Address *address) { if (!address) return NULL; if (address->network) { assert(address->section); ordered_hashmap_remove(address->network->addresses_by_section, address->section); } if (address->link) { NDiscAddress *n; set_remove(address->link->addresses, address); set_remove(address->link->addresses_foreign, address); set_remove(address->link->static_addresses, address); if (address->link->dhcp_address == address) address->link->dhcp_address = NULL; if (address->link->dhcp_address_old == address) address->link->dhcp_address_old = NULL; set_remove(address->link->dhcp6_addresses, address); set_remove(address->link->dhcp6_addresses_old, address); set_remove(address->link->dhcp6_pd_addresses, address); set_remove(address->link->dhcp6_pd_addresses_old, address); SET_FOREACH(n, address->link->ndisc_addresses) if (n->address == address) free(set_remove(address->link->ndisc_addresses, n)); if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address)) memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr)); } sd_ipv4acd_unref(address->acd); network_config_section_free(address->section); free(address->label); return mfree(address); } static bool address_may_have_broadcast(const Address *a) { assert(a); /* A /31 or /32 IPv4 address does not have a broadcast address. * See https://tools.ietf.org/html/rfc3021 */ return a->family == AF_INET && in4_addr_is_null(&a->in_addr_peer.in) && a->prefixlen <= 30; } static uint32_t address_prefix(const Address *a) { assert(a); /* make sure we don't try to shift by 32. * See ISO/IEC 9899:TC3 ยง 6.5.7.3. */ if (a->prefixlen == 0) return 0; if (a->in_addr_peer.in.s_addr != 0) return be32toh(a->in_addr_peer.in.s_addr) >> (32 - a->prefixlen); else return be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen); } void address_hash_func(const Address *a, struct siphash *state) { assert(a); siphash24_compress(&a->family, sizeof(a->family), state); switch (a->family) { case AF_INET: siphash24_compress(&a->prefixlen, sizeof(a->prefixlen), state); uint32_t prefix = address_prefix(a); siphash24_compress(&prefix, sizeof(prefix), state); _fallthrough_; case AF_INET6: siphash24_compress(&a->in_addr, FAMILY_ADDRESS_SIZE(a->family), state); break; default: /* treat any other address family as AF_UNSPEC */ break; } } int address_compare_func(const Address *a1, const Address *a2) { int r; r = CMP(a1->family, a2->family); if (r != 0) return r; switch (a1->family) { case AF_INET: /* See kernel's find_matching_ifa() in net/ipv4/devinet.c */ r = CMP(a1->prefixlen, a2->prefixlen); if (r != 0) return r; r = CMP(address_prefix(a1), address_prefix(a2)); if (r != 0) return r; _fallthrough_; case AF_INET6: /* See kernel's ipv6_get_ifaddr() in net/ipv6/addrconf.c */ return memcmp(&a1->in_addr, &a2->in_addr, FAMILY_ADDRESS_SIZE(a1->family)); default: /* treat any other address family as AF_UNSPEC */ return 0; } } DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(address_hash_ops, Address, address_hash_func, address_compare_func, address_free); bool address_equal(const Address *a1, const Address *a2) { if (a1 == a2) return true; if (!a1 || !a2) return false; return address_compare_func(a1, a2) == 0; } static int address_copy(Address *dest, const Address *src) { int r; assert(dest); assert(src); if (src->family == AF_INET) { r = free_and_strdup(&dest->label, src->label); if (r < 0) return r; } dest->family = src->family; dest->prefixlen = src->prefixlen; dest->scope = src->scope; dest->flags = src->flags; dest->cinfo = src->cinfo; dest->in_addr = src->in_addr; dest->in_addr_peer = src->in_addr_peer; if (address_may_have_broadcast(src)) dest->broadcast = src->broadcast; dest->duplicate_address_detection = src->duplicate_address_detection; return 0; } static int address_set_masquerade(Address *address, bool add) { union in_addr_union masked; int r; assert(address); assert(address->link); if (!address->link->network) return 0; if (!address->link->network->ip_masquerade) return 0; if (address->family != AF_INET) return 0; if (address->scope >= RT_SCOPE_LINK) return 0; if (address->ip_masquerade_done == add) return 0; masked = address->in_addr; r = in_addr_mask(address->family, &masked, address->prefixlen); if (r < 0) return r; r = fw_add_masquerade(add, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0); if (r < 0) return r; address->ip_masquerade_done = add; return 0; } static int address_add_internal(Link *link, Set **addresses, const Address *in, Address **ret) { _cleanup_(address_freep) Address *address = NULL; int r; assert(link); assert(addresses); assert(in); r = address_new(&address); if (r < 0) return r; r = address_copy(address, in); if (r < 0) return r; /* Consider address tentative until we get the real flags from the kernel */ address->flags = IFA_F_TENTATIVE; r = set_ensure_put(addresses, &address_hash_ops, address); if (r < 0) return r; if (r == 0) return -EEXIST; address->link = link; if (ret) *ret = address; TAKE_PTR(address); return 0; } static int address_add_foreign(Link *link, const Address *in, Address **ret) { return address_add_internal(link, &link->addresses_foreign, in, ret); } static int address_add(Link *link, const Address *in, Address **ret) { Address *address; int r; assert(link); assert(in); r = address_get(link, in, &address); if (r == -ENOENT) { /* Address does not exist, create a new one */ r = address_add_internal(link, &link->addresses, in, &address); if (r < 0) return r; } else if (r == 0) { /* Take over a foreign address */ r = set_ensure_put(&link->addresses, &address_hash_ops, address); if (r < 0) return r; set_remove(link->addresses_foreign, address); } else if (r == 1) { /* Already exists, do nothing */ ; } else return r; if (ret) *ret = address; return 0; } static int address_update(Address *address, const Address *src) { bool ready; int r; assert(address); assert(address->link); assert(src); ready = address_is_ready(address); address->flags = src->flags; address->scope = src->scope; address->cinfo = src->cinfo; if (IN_SET(address->link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 0; link_update_operstate(address->link, true); link_check_ready(address->link); if (!ready && address_is_ready(address)) { if (address->callback) { r = address->callback(address); if (r < 0) return r; } if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) > 0 && IN6_IS_ADDR_UNSPECIFIED(&address->link->ipv6ll_address) > 0) { r = link_ipv6ll_gained(address->link, &address->in_addr.in6); if (r < 0) return r; } } return 0; } static int address_drop(Address *address) { Link *link; bool ready; int r; assert(address); ready = address_is_ready(address); link = address->link; r = address_set_masquerade(address, false); if (r < 0) log_link_warning_errno(link, r, "Failed to disable IP masquerading, ignoring: %m"); address_free(address); link_update_operstate(link, true); if (link && !ready) link_check_ready(link); return 0; } int address_get(Link *link, const Address *in, Address **ret) { Address *existing; assert(link); assert(in); existing = set_get(link->addresses, in); if (existing) { if (ret) *ret = existing; return 1; } existing = set_get(link->addresses_foreign, in); if (existing) { if (ret) *ret = existing; return 0; } return -ENOENT; } static bool address_exists_internal(Set *addresses, int family, const union in_addr_union *in_addr) { Address *address; SET_FOREACH(address, addresses) { if (address->family != family) continue; if (in_addr_equal(address->family, &address->in_addr, in_addr)) return true; } return false; } bool address_exists(Link *link, int family, const union in_addr_union *in_addr) { assert(link); assert(IN_SET(family, AF_INET, AF_INET6)); assert(in_addr); if (address_exists_internal(link->addresses, family, in_addr)) return true; if (address_exists_internal(link->addresses_foreign, family, in_addr)) return true; return false; } static int address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(m); assert(link); assert(link->ifname); if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 1; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EADDRNOTAVAIL) log_link_message_warning_errno(link, m, r, "Could not drop address"); else if (r >= 0) (void) manager_rtnl_process_address(rtnl, m, link->manager); return 1; } int address_remove( const Address *address, Link *link, link_netlink_message_handler_t callback) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(address); assert(IN_SET(address->family, AF_INET, AF_INET6)); assert(link); assert(link->ifindex > 0); assert(link->manager); assert(link->manager->rtnl); if (DEBUG_LOGGING) { _cleanup_free_ char *b = NULL; (void) in_addr_to_string(address->family, &address->in_addr, &b); log_link_debug(link, "Removing address %s", strna(b)); } r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR, link->ifindex, address->family); if (r < 0) return log_link_error_errno(link, r, "Could not allocate RTM_DELADDR message: %m"); r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen); if (r < 0) return log_link_error_errno(link, r, "Could not set prefixlen: %m"); r = netlink_message_append_in_addr_union(req, IFA_LOCAL, address->family, &address->in_addr); if (r < 0) return log_link_error_errno(link, r, "Could not append IFA_LOCAL attribute: %m"); r = netlink_call_async(link->manager->rtnl, NULL, req, callback ?: address_remove_handler, link_netlink_destroy_callback, link); if (r < 0) return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); link_ref(link); return 0; } static bool link_is_static_address_configured(const Link *link, const Address *address) { Address *net_address; assert(link); assert(address); if (!link->network) return false; ORDERED_HASHMAP_FOREACH(net_address, link->network->addresses_by_section) if (address_equal(net_address, address)) return true; return false; } static bool link_address_is_dynamic(const Link *link, const Address *address) { Route *route; assert(link); assert(address); if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME) return true; /* Even when the address is leased from a DHCP server, networkd assign the address * without lifetime when KeepConfiguration=dhcp. So, let's check that we have * corresponding routes with RTPROT_DHCP. */ SET_FOREACH(route, link->routes_foreign) { if (route->protocol != RTPROT_DHCP) continue; if (address->family != route->family) continue; if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc)) return true; } return false; } static int link_enumerate_ipv6_tentative_addresses(Link *link) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *addr; int r; assert(link); assert(link->manager); assert(link->manager->rtnl); r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6); if (r < 0) return r; r = sd_netlink_call(link->manager->rtnl, req, 0, &reply); if (r < 0) return r; for (addr = reply; addr; addr = sd_netlink_message_next(addr)) { unsigned char flags; int ifindex; r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex); if (r < 0) { log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m"); continue; } else if (link->ifindex != ifindex) continue; r = sd_rtnl_message_addr_get_flags(addr, &flags); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m"); continue; } else if (!(flags & IFA_F_TENTATIVE)) continue; log_link_debug(link, "Found tentative ipv6 link-local address"); (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager); } return 0; } int link_drop_foreign_addresses(Link *link) { Address *address; int k, r = 0; assert(link); /* The kernel doesn't notify us about tentative addresses; * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */ if (!link_ipv6ll_enabled(link)) { r = link_enumerate_ipv6_tentative_addresses(link); if (r < 0) return r; } SET_FOREACH(address, link->addresses_foreign) { /* we consider IPv6LL addresses to be managed by the kernel */ if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link)) continue; if (link_address_is_dynamic(link, address)) { if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) continue; } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC)) continue; if (link_is_static_address_configured(link, address)) { k = address_add(link, address, NULL); if (k < 0) { log_link_error_errno(link, k, "Failed to add address: %m"); if (r >= 0) r = k; } } else { k = address_remove(address, link, NULL); if (k < 0 && r >= 0) r = k; } } return r; } static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(m); assert(link); assert(link->ifname); assert(link->address_remove_messages > 0); link->address_remove_messages--; if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 1; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EADDRNOTAVAIL) log_link_message_warning_errno(link, m, r, "Could not drop address"); else if (r >= 0) (void) manager_rtnl_process_address(rtnl, m, link->manager); if (link->address_remove_messages == 0 && link->request_static_addresses) { link_set_state(link, LINK_STATE_CONFIGURING); r = link_set_addresses(link); if (r < 0) link_enter_failed(link); } return 1; } int link_drop_addresses(Link *link) { Address *address, *pool_address; int k, r = 0; assert(link); SET_FOREACH(address, link->addresses) { /* we consider IPv6LL addresses to be managed by the kernel */ if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link)) continue; k = address_remove(address, link, remove_static_address_handler); if (k < 0 && r >= 0) { r = k; continue; } link->address_remove_messages++; SET_FOREACH(pool_address, link->pool_addresses) if (address_equal(address, pool_address)) address_free(set_remove(link->pool_addresses, pool_address)); } return r; } static int address_acquire(Link *link, const Address *original, Address **ret) { union in_addr_union in_addr = IN_ADDR_NULL; struct in_addr broadcast = {}; _cleanup_(address_freep) Address *na = NULL; int r; assert(link); assert(original); assert(ret); /* Something useful was configured? just use it */ r = in_addr_is_null(original->family, &original->in_addr); if (r < 0) return r; if (r == 0) { *ret = NULL; return 0; } /* The address is configured to be 0.0.0.0 or [::] by the user? * Then let's acquire something more useful from the pool. */ r = address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr); if (r < 0) return r; if (r == 0) return -EBUSY; if (original->family == AF_INET) { /* Pick first address in range for ourselves ... */ in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1); /* .. and use last as broadcast address */ if (original->prefixlen > 30) broadcast.s_addr = 0; else broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen); } else if (original->family == AF_INET6) in_addr.in6.s6_addr[15] |= 1; r = address_new(&na); if (r < 0) return r; r = address_copy(na, original); if (r < 0) return r; na->broadcast = broadcast; na->in_addr = in_addr; r = set_ensure_put(&link->pool_addresses, &address_hash_ops, na); if (r < 0) return r; if (r == 0) return -EEXIST; *ret = TAKE_PTR(na); return 1; } static int ipv4_dad_configure(Address *address); int address_configure( const Address *address, Link *link, link_netlink_message_handler_t callback, bool update, Address **ret) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; Address *acquired_address, *a; uint32_t flags; int r; assert(address); assert(IN_SET(address->family, AF_INET, AF_INET6)); assert(link); assert(link->ifindex > 0); assert(link->manager); assert(link->manager->rtnl); assert(callback); /* If this is a new address, then refuse adding more than the limit */ if (address_get(link, address, NULL) <= 0 && set_size(link->addresses) >= ADDRESSES_PER_LINK_MAX) return log_link_error_errno(link, SYNTHETIC_ERRNO(E2BIG), "Too many addresses are configured, refusing: %m"); r = address_acquire(link, address, &acquired_address); if (r < 0) return log_link_error_errno(link, r, "Failed to acquire an address from pool: %m"); if (acquired_address) address = acquired_address; if (DEBUG_LOGGING) { _cleanup_free_ char *str = NULL; (void) in_addr_to_string(address->family, &address->in_addr, &str); log_link_debug(link, "%s address: %s", update ? "Updating" : "Configuring", strna(str)); } if (update) r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req, link->ifindex, address->family); else r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR, link->ifindex, address->family); if (r < 0) return log_link_error_errno(link, r, "Could not allocate RTM_NEWADDR message: %m"); r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen); if (r < 0) return log_link_error_errno(link, r, "Could not set prefixlen: %m"); flags = address->flags | IFA_F_PERMANENT; r = sd_rtnl_message_addr_set_flags(req, flags & 0xff); if (r < 0) return log_link_error_errno(link, r, "Could not set flags: %m"); if (flags & ~0xff) { r = sd_netlink_message_append_u32(req, IFA_FLAGS, flags); if (r < 0) return log_link_error_errno(link, r, "Could not set extended flags: %m"); } r = sd_rtnl_message_addr_set_scope(req, address->scope); if (r < 0) return log_link_error_errno(link, r, "Could not set scope: %m"); r = netlink_message_append_in_addr_union(req, IFA_LOCAL, address->family, &address->in_addr); if (r < 0) return log_link_error_errno(link, r, "Could not append IFA_LOCAL attribute: %m"); if (in_addr_is_null(address->family, &address->in_addr_peer) == 0) { r = netlink_message_append_in_addr_union(req, IFA_ADDRESS, address->family, &address->in_addr_peer); if (r < 0) return log_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m"); } else if (address_may_have_broadcast(address)) { r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast); if (r < 0) return log_link_error_errno(link, r, "Could not append IFA_BROADCAST attribute: %m"); } if (address->family == AF_INET && address->label) { r = sd_netlink_message_append_string(req, IFA_LABEL, address->label); if (r < 0) return log_link_error_errno(link, r, "Could not append IFA_LABEL attribute: %m"); } r = sd_netlink_message_append_cache_info(req, IFA_CACHEINFO, &address->cinfo); if (r < 0) return log_link_error_errno(link, r, "Could not append IFA_CACHEINFO attribute: %m"); r = address_add(link, address, &a); if (r < 0) return log_link_error_errno(link, r, "Could not add address: %m"); r = address_set_masquerade(a, true); if (r < 0) log_link_warning_errno(link, r, "Could not enable IP masquerading, ignoring: %m"); r = netlink_call_async(link->manager->rtnl, NULL, req, callback, link_netlink_destroy_callback, link); if (r < 0) { (void) address_set_masquerade(a, false); return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); } link_ref(link); if (FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) { r = ipv4_dad_configure(a); if (r < 0) log_link_warning_errno(link, r, "Failed to start IPv4ACD client, ignoring: %m"); } if (ret) *ret = a; return 1; } static int static_address_ready_callback(Address *address) { Address *a; Link *link; assert(address); assert(address->link); link = address->link; if (!link->addresses_configured) return 0; SET_FOREACH(a, link->static_addresses) if (!address_is_ready(a)) { _cleanup_free_ char *str = NULL; (void) in_addr_to_string(a->family, &a->in_addr, &str); log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen); return 0; } /* This should not be called again */ SET_FOREACH(a, link->static_addresses) a->callback = NULL; link->addresses_ready = true; return link_set_routes(link); } static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(rtnl); assert(m); assert(link); assert(link->ifname); assert(link->address_messages > 0); link->address_messages--; if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 1; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_message_warning_errno(link, m, r, "Could not set address"); link_enter_failed(link); return 1; } else if (r >= 0) (void) manager_rtnl_process_address(rtnl, m, link->manager); if (link->address_messages == 0) { Address *a; log_link_debug(link, "Addresses set"); link->addresses_configured = true; /* When all static addresses are already ready, then static_address_ready_callback() * will not be called automatically. So, call it here. */ a = set_first(link->static_addresses); if (!a) { log_link_debug(link, "No static address is stored. Already removed?"); return 1; } r = static_address_ready_callback(a); if (r < 0) link_enter_failed(link); } return 1; } static int static_address_configure(const Address *address, Link *link, bool update) { Address *ret; int r; assert(address); assert(link); r = address_configure(address, link, address_handler, update, &ret); if (r < 0) return log_link_warning_errno(link, r, "Could not configure static address: %m"); link->address_messages++; r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret); if (r < 0) return log_link_warning_errno(link, r, "Failed to store static address: %m"); ret->callback = static_address_ready_callback; return 0; } int link_set_addresses(Link *link) { Address *ad; Prefix *p; int r; assert(link); assert(link->network); if (link->address_remove_messages != 0) { log_link_debug(link, "Removing old addresses, new addresses will be configured later."); link->request_static_addresses = true; return 0; } ORDERED_HASHMAP_FOREACH(ad, link->network->addresses_by_section) { bool update; update = address_get(link, ad, NULL) > 0; r = static_address_configure(ad, link, update); if (r < 0) return r; } HASHMAP_FOREACH(p, link->network->prefixes_by_section) { _cleanup_(address_freep) Address *address = NULL; if (!p->assign) continue; r = address_new(&address); if (r < 0) return log_oom(); r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen); if (r < 0) return log_link_warning_errno(link, r, "Could not get RA prefix: %m"); r = generate_ipv6_eui_64_address(link, &address->in_addr.in6); if (r < 0) return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m"); address->family = AF_INET6; r = static_address_configure(address, link, true); if (r < 0) return r; } if (link->address_messages == 0) { link->addresses_configured = true; link->addresses_ready = true; r = link_set_routes(link); if (r < 0) return r; } else { log_link_debug(link, "Setting addresses"); link_set_state(link, LINK_STATE_CONFIGURING); } return 0; } int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) { _cleanup_(address_freep) Address *tmp = NULL; _cleanup_free_ char *buf = NULL, *buf_peer = NULL; Link *link = NULL; uint16_t type; unsigned char flags; Address *address = NULL; char valid_buf[FORMAT_TIMESPAN_MAX]; const char *valid_str = NULL; int ifindex, r; bool has_peer = false; assert(rtnl); assert(message); assert(m); if (sd_netlink_message_is_error(message)) { r = sd_netlink_message_get_errno(message); if (r < 0) log_message_warning_errno(message, r, "rtnl: failed to receive address message, ignoring"); return 0; } r = sd_netlink_message_get_type(message, &type); if (r < 0) { log_warning_errno(r, "rtnl: could not get message type, ignoring: %m"); return 0; } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) { log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type); return 0; } r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); if (r < 0) { log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex); return 0; } r = link_get(m, ifindex, &link); if (r < 0 || !link) { /* when enumerating we might be out of sync, but we will get the address again, so just * ignore it */ if (!m->enumerating) log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex); return 0; } r = address_new(&tmp); if (r < 0) return log_oom(); r = sd_rtnl_message_addr_get_family(message, &tmp->family); if (r < 0) { log_link_warning(link, "rtnl: received address message without family, ignoring."); return 0; } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) { log_link_debug(link, "rtnl: received address message with invalid family '%i', ignoring.", tmp->family); return 0; } r = sd_rtnl_message_addr_get_prefixlen(message, &tmp->prefixlen); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without prefixlen, ignoring: %m"); return 0; } r = sd_rtnl_message_addr_get_scope(message, &tmp->scope); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without scope, ignoring: %m"); return 0; } r = sd_rtnl_message_addr_get_flags(message, &flags); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without flags, ignoring: %m"); return 0; } tmp->flags = flags; switch (tmp->family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &tmp->in_addr.in); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, IFA_ADDRESS, &tmp->in_addr_peer.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: could not get peer address from address message, ignoring: %m"); return 0; } else if (r >= 0) { if (in4_addr_equal(&tmp->in_addr.in, &tmp->in_addr_peer.in)) tmp->in_addr_peer = IN_ADDR_NULL; else has_peer = true; } r = sd_netlink_message_read_in_addr(message, IFA_BROADCAST, &tmp->broadcast); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: could not get broadcast from address message, ignoring: %m"); return 0; } r = sd_netlink_message_read_string_strdup(message, IFA_LABEL, &tmp->label); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: could not get label from address message, ignoring: %m"); return 0; } else if (r >= 0 && streq_ptr(tmp->label, link->ifname)) tmp->label = mfree(tmp->label); break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, IFA_LOCAL, &tmp->in_addr.in6); if (r >= 0) { /* Have peer address. */ r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &tmp->in_addr_peer.in6); if (r < 0) { log_link_warning_errno(link, r, "rtnl: could not get peer address from address message, ignoring: %m"); return 0; } has_peer = true; } else if (r == -ENODATA) { /* Does not have peer address. */ r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &tmp->in_addr.in6); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m"); return 0; } } else { log_link_warning_errno(link, r, "rtnl: could not get local address from address message, ignoring: %m"); return 0; } break; default: assert_not_reached("Received unsupported address family"); } (void) in_addr_to_string(tmp->family, &tmp->in_addr, &buf); (void) in_addr_to_string(tmp->family, &tmp->in_addr_peer, &buf_peer); r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &tmp->cinfo); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m"); return 0; } else if (r >= 0 && tmp->cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME) valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX, tmp->cinfo.ifa_valid * USEC_PER_SEC, USEC_PER_SEC); (void) address_get(link, tmp, &address); switch (type) { case RTM_NEWADDR: if (address) log_link_debug(link, "Remembering updated address: %s%s%s/%u (valid %s%s)", strnull(buf), has_peer ? " peer " : "", has_peer ? strnull(buf_peer) : "", tmp->prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); else { /* An address appeared that we did not request */ r = address_add_foreign(link, tmp, &address); if (r < 0) { log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m", strnull(buf), tmp->prefixlen); return 0; } else log_link_debug(link, "Remembering foreign address: %s%s%s/%u (valid %s%s)", strnull(buf), has_peer ? " peer " : "", has_peer ? strnull(buf_peer) : "", tmp->prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); } /* address_update() logs internally, so we don't need to here. */ r = address_update(address, tmp); if (r < 0) link_enter_failed(link); break; case RTM_DELADDR: if (address) { log_link_debug(link, "Forgetting address: %s%s%s/%u (valid %s%s)", strnull(buf), has_peer ? " peer " : "", has_peer ? strnull(buf_peer) : "", tmp->prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); (void) address_drop(address); } else log_link_debug(link, "Kernel removed an address we don't remember: %s%s%s/%u (valid %s%s), ignoring.", strnull(buf), has_peer ? " peer " : "", has_peer ? strnull(buf_peer) : "", tmp->prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); break; default: assert_not_reached("Received invalid RTNL message type"); } return 1; } int link_serialize_addresses(Link *link, FILE *f) { bool space = false; Address *a; assert(link); fputs("ADDRESSES=", f); SET_FOREACH(a, link->addresses) { _cleanup_free_ char *address_str = NULL; if (in_addr_to_string(a->family, &a->in_addr, &address_str) < 0) continue; fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen); space = true; } fputc('\n', f); return 0; } int link_deserialize_addresses(Link *link, const char *addresses) { int r; assert(link); for (const char *p = addresses;; ) { _cleanup_(address_freep) Address *tmp = NULL; _cleanup_free_ char *address_str = NULL; r = extract_first_word(&p, &address_str, NULL, 0); if (r < 0) return log_link_debug_errno(link, r, "Failed to parse ADDRESSES=: %m"); if (r == 0) return 0; r = address_new(&tmp); if (r < 0) return log_oom(); r = in_addr_prefix_from_string_auto(address_str, &tmp->family, &tmp->in_addr, &tmp->prefixlen); if (r < 0) { log_link_debug_errno(link, r, "Failed to parse address, ignoring: %s", address_str); continue; } r = address_add(link, tmp, NULL); if (r < 0) log_link_debug_errno(link, r, "Failed to add address %s, ignoring: %m", address_str); } return 0; } static void static_address_on_acd(sd_ipv4acd *acd, int event, void *userdata) { _cleanup_free_ char *pretty = NULL; Address *address; Link *link; int r; assert(acd); assert(userdata); address = (Address *) userdata; link = address->link; (void) in_addr_to_string(address->family, &address->in_addr, &pretty); switch (event) { case SD_IPV4ACD_EVENT_STOP: log_link_debug(link, "Stopping ACD client..."); return; case SD_IPV4ACD_EVENT_BIND: log_link_debug(link, "Successfully claimed address %s", strna(pretty)); link_check_ready(link); break; case SD_IPV4ACD_EVENT_CONFLICT: log_link_warning(link, "DAD conflict. Dropping address %s", strna(pretty)); r = address_remove(address, link, NULL); if (r < 0) log_link_error_errno(link, r, "Failed to drop DAD conflicted address %s", strna(pretty));; link_check_ready(link); break; default: assert_not_reached("Invalid IPv4ACD event."); } (void) sd_ipv4acd_stop(acd); return; } static int ipv4_dad_configure(Address *address) { int r; assert(address); assert(address->link); if (address->family != AF_INET) return 0; if (DEBUG_LOGGING) { _cleanup_free_ char *pretty = NULL; (void) in_addr_to_string(address->family, &address->in_addr, &pretty); log_link_debug(address->link, "Starting IPv4ACD client. Probing address %s", strna(pretty)); } if (!address->acd) { r = sd_ipv4acd_new(&address->acd); if (r < 0) return r; r = sd_ipv4acd_attach_event(address->acd, address->link->manager->event, 0); if (r < 0) return r; } r = sd_ipv4acd_set_ifindex(address->acd, address->link->ifindex); if (r < 0) return r; r = sd_ipv4acd_set_mac(address->acd, &address->link->hw_addr.addr.ether); if (r < 0) return r; r = sd_ipv4acd_set_address(address->acd, &address->in_addr.in); if (r < 0) return r; r = sd_ipv4acd_set_callback(address->acd, static_address_on_acd, address); if (r < 0) return r; return sd_ipv4acd_start(address->acd, true); } static int ipv4_dad_update_mac_one(Address *address) { bool running; int r; assert(address); if (!address->acd) return 0; running = sd_ipv4acd_is_running(address->acd); r = sd_ipv4acd_stop(address->acd); if (r < 0) return r; r = sd_ipv4acd_set_mac(address->acd, &address->link->hw_addr.addr.ether); if (r < 0) return r; if (running) { r = sd_ipv4acd_start(address->acd, true); if (r < 0) return r; } return 0; } int ipv4_dad_update_mac(Link *link) { Address *address; int k, r = 0; assert(link); SET_FOREACH(address, link->addresses) { k = ipv4_dad_update_mac_one(address); if (k < 0 && r >= 0) r = k; } return r; } int ipv4_dad_stop(Link *link) { Address *address; int k, r = 0; assert(link); SET_FOREACH(address, link->addresses) { k = sd_ipv4acd_stop(address->acd); if (k < 0 && r >= 0) r = k; } return r; } void ipv4_dad_unref(Link *link) { Address *address; assert(link); SET_FOREACH(address, link->addresses) address->acd = sd_ipv4acd_unref(address->acd); } int config_parse_broadcast( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Network *network = userdata; _cleanup_(address_free_or_set_invalidp) Address *n = NULL; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } if (n->family == AF_INET6) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue); return 0; } r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Broadcast is invalid, ignoring assignment: %s", rvalue); return 0; } n->family = AF_INET; n = NULL; return 0; } int config_parse_address( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Network *network = userdata; _cleanup_(address_free_or_set_invalidp) Address *n = NULL; union in_addr_union buffer; unsigned char prefixlen; int r, f; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); if (streq(section, "Network")) /* we are not in an Address section, so use line number instead. */ r = address_new_static(network, filename, line, &n); else r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } /* Address=address/prefixlen */ r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_REFUSE, &f, &buffer, &prefixlen); if (r == -ENOANO) { log_syntax(unit, LOG_WARNING, filename, line, r, "An address '%s' is specified without prefix length. " "The behavior of parsing addresses without prefix length will be changed in the future release. " "Please specify prefix length explicitly.", rvalue); r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_LEGACY, &f, &buffer, &prefixlen); } if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid address '%s', ignoring assignment: %m", rvalue); return 0; } if (n->family != AF_UNSPEC && f != n->family) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Address is incompatible, ignoring assignment: %s", rvalue); return 0; } if (in_addr_is_null(f, &buffer)) { /* Will use address from address pool. Note that for ipv6 case, prefix of the address * pool is 8, but 40 bit is used by the global ID and 16 bit by the subnet ID. So, * let's limit the prefix length to 64 or larger. See RFC4193. */ if ((f == AF_INET && prefixlen < 8) || (f == AF_INET6 && prefixlen < 64)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Null address with invalid prefixlen='%u', ignoring assignment: %s", prefixlen, rvalue); return 0; } } n->family = f; n->prefixlen = prefixlen; if (streq(lvalue, "Address")) n->in_addr = buffer; else n->in_addr_peer = buffer; n = NULL; return 0; } int config_parse_label( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { _cleanup_(address_free_or_set_invalidp) Address *n = NULL; Network *network = userdata; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } if (!address_label_valid(rvalue)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Interface label is too long or invalid, ignoring assignment: %s", rvalue); return 0; } r = free_and_strdup(&n->label, rvalue); if (r < 0) return log_oom(); n = NULL; return 0; } int config_parse_lifetime( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Network *network = userdata; _cleanup_(address_free_or_set_invalidp) Address *n = NULL; uint32_t k; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } /* We accept only "forever", "infinity", empty, or "0". */ if (STR_IN_SET(rvalue, "forever", "infinity", "")) k = CACHE_INFO_INFINITY_LIFE_TIME; else if (streq(rvalue, "0")) k = 0; else { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid PreferredLifetime= value, ignoring: %s", rvalue); return 0; } n->cinfo.ifa_prefered = k; TAKE_PTR(n); return 0; } int config_parse_address_flags( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Network *network = userdata; _cleanup_(address_free_or_set_invalidp) Address *n = NULL; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } r = parse_boolean(rvalue); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring: %s", lvalue, rvalue); return 0; } if (streq(lvalue, "AddPrefixRoute")) r = !r; SET_FLAG(n->flags, ltype, r); n = NULL; return 0; } int config_parse_address_scope( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Network *network = userdata; _cleanup_(address_free_or_set_invalidp) Address *n = NULL; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } if (streq(rvalue, "host")) n->scope = RT_SCOPE_HOST; else if (streq(rvalue, "link")) n->scope = RT_SCOPE_LINK; else if (streq(rvalue, "global")) n->scope = RT_SCOPE_UNIVERSE; else { r = safe_atou8(rvalue , &n->scope); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Could not parse address scope \"%s\", ignoring assignment: %m", rvalue); return 0; } } n->scope_set = true; n = NULL; return 0; } int config_parse_duplicate_address_detection( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Network *network = userdata; _cleanup_(address_free_or_set_invalidp) Address *n = NULL; AddressFamily a; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_new_static(network, filename, section_line, &n); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to allocate new address, ignoring assignment: %m"); return 0; } r = parse_boolean(rvalue); if (r >= 0) { log_syntax(unit, LOG_WARNING, filename, line, 0, "For historical reasons, %s=%s means %s=%s. " "Please use 'both', 'ipv4', 'ipv6' or 'none' instead.", lvalue, rvalue, lvalue, r ? "none" : "both"); n->duplicate_address_detection = r ? ADDRESS_FAMILY_NO : ADDRESS_FAMILY_YES; n = NULL; return 0; } a = duplicate_address_detection_address_family_from_string(rvalue); if (a < 0) { log_syntax(unit, LOG_WARNING, filename, line, SYNTHETIC_ERRNO(EINVAL), "Failed to parse %s=, ignoring: %s", lvalue, rvalue); return 0; } n->duplicate_address_detection = a; n = NULL; return 0; } bool address_is_ready(const Address *a) { assert(a); return !(a->flags & IFA_F_TENTATIVE); } static int address_section_verify(Address *address) { if (section_is_invalid(address->section)) return -EINVAL; if (address->family == AF_UNSPEC) { assert(address->section); return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: Address section without Address= field configured. " "Ignoring [Address] section from line %u.", address->section->filename, address->section->line); } if (address_may_have_broadcast(address)) { if (address->broadcast.s_addr == 0) address->broadcast.s_addr = address->in_addr.in.s_addr | htobe32(0xfffffffflu >> address->prefixlen); } else if (address->broadcast.s_addr != 0) { log_warning("%s: broadcast address is set for IPv6 address or IPv4 address with prefixlength larger than 30. " "Ignoring Broadcast= setting in the [Address] section from line %u.", address->section->filename, address->section->line); address->broadcast.s_addr = 0; } if (address->family == AF_INET6 && address->label) { log_warning("%s: address label is set for IPv6 address in the [Address] section from line %u. " "Ignoring Label= setting.", address->section->filename, address->section->line); address->label = mfree(address->label); } if (in_addr_is_localhost(address->family, &address->in_addr) > 0 && (address->family == AF_INET || !address->scope_set)) { /* For IPv4, scope must be always RT_SCOPE_HOST. * For IPv6, use RT_SCOPE_HOST only when it is not explicitly specified. */ if (address->scope_set && address->scope != RT_SCOPE_HOST) log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: non-host scope is set in the [Address] section from line %u. " "Ignoring Scope= setting.", address->section->filename, address->section->line); address->scope = RT_SCOPE_HOST; } if (!FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV6)) address->flags |= IFA_F_NODAD; return 0; } void network_drop_invalid_addresses(Network *network) { Address *address; assert(network); ORDERED_HASHMAP_FOREACH(address, network->addresses_by_section) if (address_section_verify(address) < 0) address_free(address); }