| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <net/if.h> |
| #include <net/if_arp.h> |
| |
| #include "alloc-util.h" |
| #include "firewall-util.h" |
| #include "logarithm.h" |
| #include "memory-util.h" |
| #include "netlink-util.h" |
| #include "networkd-address-pool.h" |
| #include "networkd-address.h" |
| #include "networkd-dhcp-server.h" |
| #include "networkd-ipv4acd.h" |
| #include "networkd-manager.h" |
| #include "networkd-netlabel.h" |
| #include "networkd-network.h" |
| #include "networkd-queue.h" |
| #include "networkd-route-util.h" |
| #include "networkd-route.h" |
| #include "parse-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "strxcpyx.h" |
| |
| #define ADDRESSES_PER_LINK_MAX 2048U |
| #define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U |
| |
| int address_flags_to_string_alloc(uint32_t flags, int family, char **ret) { |
| _cleanup_free_ char *str = NULL; |
| static const char* map[] = { |
| [LOG2U(IFA_F_SECONDARY)] = "secondary", /* This is also called "temporary" for ipv6. */ |
| [LOG2U(IFA_F_NODAD)] = "nodad", |
| [LOG2U(IFA_F_OPTIMISTIC)] = "optimistic", |
| [LOG2U(IFA_F_DADFAILED)] = "dadfailed", |
| [LOG2U(IFA_F_HOMEADDRESS)] = "home-address", |
| [LOG2U(IFA_F_DEPRECATED)] = "deprecated", |
| [LOG2U(IFA_F_TENTATIVE)] = "tentative", |
| [LOG2U(IFA_F_PERMANENT)] = "permanent", |
| [LOG2U(IFA_F_MANAGETEMPADDR)] = "manage-temporary-address", |
| [LOG2U(IFA_F_NOPREFIXROUTE)] = "no-prefixroute", |
| [LOG2U(IFA_F_MCAUTOJOIN)] = "auto-join", |
| [LOG2U(IFA_F_STABLE_PRIVACY)] = "stable-privacy", |
| }; |
| |
| assert(IN_SET(family, AF_INET, AF_INET6)); |
| assert(ret); |
| |
| for (size_t i = 0; i < ELEMENTSOF(map); i++) |
| if (FLAGS_SET(flags, 1 << i) && map[i]) |
| if (!strextend_with_separator( |
| &str, ",", |
| family == AF_INET6 && (1 << i) == IFA_F_SECONDARY ? "temporary" : map[i])) |
| return -ENOMEM; |
| |
| *ret = TAKE_PTR(str); |
| 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, |
| .lifetime_valid_usec = USEC_INFINITY, |
| .lifetime_preferred_usec = USEC_INFINITY, |
| .set_broadcast = -1, |
| }; |
| |
| *ret = TAKE_PTR(address); |
| |
| return 0; |
| } |
| |
| static int address_new_static(Network *network, const char *filename, unsigned section_line, Address **ret) { |
| _cleanup_(config_section_freep) ConfigSection *n = NULL; |
| _cleanup_(address_freep) Address *address = NULL; |
| int r; |
| |
| assert(network); |
| assert(ret); |
| assert(filename); |
| assert(section_line > 0); |
| |
| r = 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); |
| address->source = NETWORK_CONFIG_SOURCE_STATIC; |
| /* This will be adjusted in address_section_verify(). */ |
| address->duplicate_address_detection = _ADDRESS_FAMILY_INVALID; |
| |
| r = ordered_hashmap_ensure_put(&network->addresses_by_section, &config_section_hash_ops, 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) { |
| set_remove(address->link->addresses, address); |
| |
| if (address->family == AF_INET6 && |
| in6_addr_equal(&address->in_addr.in6, &address->link->ipv6ll_address)) |
| memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr)); |
| } |
| |
| sd_ipv4acd_unref(address->acd); |
| |
| config_section_free(address->section); |
| free(address->label); |
| free(address->netlabel); |
| return mfree(address); |
| } |
| |
| bool address_is_ready(const Address *a) { |
| assert(a); |
| |
| if (!ipv4acd_bound(a)) |
| return false; |
| |
| if (FLAGS_SET(a->flags, IFA_F_TENTATIVE)) |
| return false; |
| |
| if (FLAGS_SET(a->state, NETWORK_CONFIG_STATE_REMOVING)) |
| return false; |
| |
| if (!FLAGS_SET(a->state, NETWORK_CONFIG_STATE_CONFIGURED)) |
| return false; |
| |
| return true; |
| } |
| |
| void link_mark_addresses(Link *link, NetworkConfigSource source) { |
| Address *a; |
| |
| assert(link); |
| |
| SET_FOREACH(a, link->addresses) { |
| if (a->source != source) |
| continue; |
| |
| address_mark(a); |
| } |
| } |
| |
| static bool address_needs_to_set_broadcast(const Address *a, Link *link) { |
| assert(a); |
| assert(link); |
| |
| if (a->family != AF_INET) |
| return false; |
| |
| if (in4_addr_is_set(&a->in_addr_peer.in)) |
| return false; |
| |
| /* A /31 or /32 IPv4 address does not have a broadcast address. |
| * See https://tools.ietf.org/html/rfc3021 */ |
| if (a->prefixlen > 30) |
| return false; |
| |
| /* If explicitly configured, do not update the address. */ |
| if (in4_addr_is_set(&a->broadcast)) |
| return false; |
| |
| if (a->set_broadcast >= 0) |
| return a->set_broadcast; |
| |
| /* Defaults to true, except for wireguard, as typical configuration for wireguard does not set |
| * broadcast. */ |
| return !streq_ptr(link->kind, "wireguard"); |
| } |
| |
| void address_set_broadcast(Address *a, Link *link) { |
| assert(a); |
| assert(link); |
| |
| if (!address_needs_to_set_broadcast(a, link)) |
| return; |
| |
| a->broadcast.s_addr = a->in_addr.in.s_addr | htobe32(UINT32_C(0xffffffff) >> a->prefixlen); |
| } |
| |
| static void address_set_cinfo(Manager *m, const Address *a, struct ifa_cacheinfo *cinfo) { |
| usec_t now_usec; |
| |
| assert(m); |
| assert(a); |
| assert(cinfo); |
| |
| assert_se(sd_event_now(m->event, CLOCK_BOOTTIME, &now_usec) >= 0); |
| |
| *cinfo = (struct ifa_cacheinfo) { |
| .ifa_valid = usec_to_sec(a->lifetime_valid_usec, now_usec), |
| .ifa_prefered = usec_to_sec(a->lifetime_preferred_usec, now_usec), |
| }; |
| } |
| |
| static void address_set_lifetime(Manager *m, Address *a, const struct ifa_cacheinfo *cinfo) { |
| usec_t now_usec; |
| |
| assert(m); |
| assert(a); |
| assert(cinfo); |
| |
| assert_se(sd_event_now(m->event, CLOCK_BOOTTIME, &now_usec) >= 0); |
| |
| a->lifetime_valid_usec = sec_to_usec(cinfo->ifa_valid, now_usec); |
| a->lifetime_preferred_usec = sec_to_usec(cinfo->ifa_prefered, now_usec); |
| } |
| |
| 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 § 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); |
| } |
| |
| static void address_kernel_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; |
| } |
| } |
| |
| static int address_kernel_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_PRIVATE_HASH_OPS( |
| address_kernel_hash_ops, |
| Address, |
| address_kernel_hash_func, |
| address_kernel_compare_func); |
| |
| DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( |
| address_kernel_hash_ops_free, |
| Address, |
| address_kernel_hash_func, |
| address_kernel_compare_func, |
| address_free); |
| |
| /* The functions below are mainly used by managing Request. */ |
| static void address_hash_func(const Address *a, struct siphash *state) { |
| assert(a); |
| |
| siphash24_compress(&a->family, sizeof(a->family), state); |
| |
| /* treat any other address family as AF_UNSPEC */ |
| if (!IN_SET(a->family, AF_INET, AF_INET6)) |
| return; |
| |
| siphash24_compress(&a->prefixlen, sizeof(a->prefixlen), state); |
| siphash24_compress(&a->in_addr, FAMILY_ADDRESS_SIZE(a->family), state); |
| siphash24_compress(&a->in_addr_peer, FAMILY_ADDRESS_SIZE(a->family), state); |
| |
| if (a->family == AF_INET) { |
| /* On update, the kernel ignores the address label and broadcast address, hence we need |
| * to distinguish addresses with different labels or broadcast addresses. Otherwise, |
| * the label or broadcast address change will not be applied when we reconfigure the |
| * interface. */ |
| siphash24_compress_string(a->label, state); |
| siphash24_compress(&a->broadcast, sizeof(a->broadcast), state); |
| } |
| } |
| |
| int address_compare_func(const Address *a1, const Address *a2) { |
| int r; |
| |
| r = CMP(a1->family, a2->family); |
| if (r != 0) |
| return r; |
| |
| if (!IN_SET(a1->family, AF_INET, AF_INET6)) |
| return 0; |
| |
| r = CMP(a1->prefixlen, a2->prefixlen); |
| if (r != 0) |
| return r; |
| |
| r = memcmp(&a1->in_addr, &a2->in_addr, FAMILY_ADDRESS_SIZE(a1->family)); |
| if (r != 0) |
| return r; |
| |
| r = memcmp(&a1->in_addr_peer, &a2->in_addr_peer, FAMILY_ADDRESS_SIZE(a1->family)); |
| if (r != 0) |
| return r; |
| |
| if (a1->family == AF_INET) { |
| r = strcmp_ptr(a1->label, a2->label); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a1->broadcast.s_addr, a2->broadcast.s_addr); |
| if (r != 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int 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_equalify(Address *address, const Address *src) { |
| int r; |
| |
| assert(address); |
| assert(src); |
| |
| if (address_kernel_compare_func(address, src) != 0) |
| return -EINVAL; |
| |
| if (address->family == AF_INET) { |
| address->broadcast = src->broadcast; |
| r = free_and_strdup(&address->label, src->label); |
| if (r < 0) |
| return r; |
| } else { |
| address->prefixlen = src->prefixlen; |
| address->in_addr_peer = src->in_addr_peer; |
| } |
| |
| return 0; |
| } |
| |
| int address_dup(const Address *src, Address **ret) { |
| _cleanup_(address_freep) Address *dest = NULL; |
| int r; |
| |
| assert(src); |
| assert(ret); |
| |
| dest = newdup(Address, src, 1); |
| if (!dest) |
| return -ENOMEM; |
| |
| /* clear all pointers */ |
| dest->network = NULL; |
| dest->section = NULL; |
| dest->link = NULL; |
| dest->label = NULL; |
| dest->acd = NULL; |
| dest->netlabel = NULL; |
| |
| if (src->family == AF_INET) { |
| r = free_and_strdup(&dest->label, src->label); |
| if (r < 0) |
| return r; |
| } |
| |
| r = free_and_strdup(&dest->netlabel, src->netlabel); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(dest); |
| 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->family == AF_INET && |
| !FLAGS_SET(address->link->network->ip_masquerade, ADDRESS_FAMILY_IPV4)) |
| return 0; |
| |
| if (address->family == AF_INET6 && |
| !FLAGS_SET(address->link->network->ip_masquerade, ADDRESS_FAMILY_IPV6)) |
| 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(&address->link->manager->fw_ctx, add, address->family, &masked, address->prefixlen); |
| if (r < 0) |
| return r; |
| |
| address->ip_masquerade_done = add; |
| |
| return 0; |
| } |
| |
| static int address_add(Link *link, Address *address) { |
| int r; |
| |
| assert(link); |
| assert(address); |
| |
| r = set_ensure_put(&link->addresses, &address_kernel_hash_ops_free, address); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EEXIST; |
| |
| address->link = link; |
| return 0; |
| } |
| |
| static int address_update(Address *address) { |
| Link *link = ASSERT_PTR(ASSERT_PTR(address)->link); |
| int r; |
| |
| if (address_is_ready(address) && |
| address->family == AF_INET6 && |
| in6_addr_is_link_local(&address->in_addr.in6) && |
| in6_addr_is_null(&link->ipv6ll_address)) { |
| |
| link->ipv6ll_address = address->in_addr.in6; |
| |
| r = link_ipv6ll_gained(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = address_set_masquerade(address, /* add = */ true); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not enable IP masquerading: %m"); |
| |
| address_add_netlabel(address); |
| |
| if (address_is_ready(address) && address->callback) { |
| r = address->callback(address); |
| if (r < 0) |
| return r; |
| } |
| |
| link_update_operstate(link, /* also_update_master = */ true); |
| link_check_ready(link); |
| return 0; |
| } |
| |
| static int address_drop(Address *address) { |
| Link *link = ASSERT_PTR(ASSERT_PTR(address)->link); |
| int r; |
| |
| r = address_set_masquerade(address, /* add = */ false); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to disable IP masquerading, ignoring: %m"); |
| |
| address_del_netlabel(address); |
| |
| if (address->state == 0) |
| address_free(address); |
| |
| link_update_operstate(link, /* also_update_master = */ true); |
| 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) |
| return -ENOENT; |
| |
| if (ret) |
| *ret = existing; |
| return 0; |
| } |
| |
| int link_get_address(Link *link, int family, const union in_addr_union *address, unsigned char prefixlen, Address **ret) { |
| Address *a; |
| int r; |
| |
| assert(link); |
| assert(IN_SET(family, AF_INET, AF_INET6)); |
| assert(address); |
| |
| /* This find an Address object on the link which matches the given address and prefix length |
| * and does not have peer address. When the prefixlen is zero, then an Address object with an |
| * arbitrary prefixlen will be returned. */ |
| |
| if (family == AF_INET6 || prefixlen != 0) { |
| _cleanup_(address_freep) Address *tmp = NULL; |
| |
| /* In this case, we can use address_get(). */ |
| |
| r = address_new(&tmp); |
| if (r < 0) |
| return r; |
| |
| tmp->family = family; |
| tmp->in_addr = *address; |
| tmp->prefixlen = prefixlen; |
| |
| r = address_get(link, tmp, &a); |
| if (r < 0) |
| return r; |
| |
| if (family == AF_INET6) { |
| /* IPv6 addresses are managed without peer address and prefix length. Hence, we need |
| * to check them explicitly. */ |
| if (in_addr_is_set(family, &a->in_addr_peer)) |
| return -ENOENT; |
| if (prefixlen != 0 && a->prefixlen != prefixlen) |
| return -ENOENT; |
| } |
| |
| if (ret) |
| *ret = a; |
| |
| return 0; |
| } |
| |
| SET_FOREACH(a, link->addresses) { |
| if (a->family != family) |
| continue; |
| |
| if (!in_addr_equal(family, &a->in_addr, address)) |
| continue; |
| |
| if (in_addr_is_set(family, &a->in_addr_peer)) |
| continue; |
| |
| if (ret) |
| *ret = a; |
| |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |
| |
| int manager_get_address(Manager *manager, int family, const union in_addr_union *address, unsigned char prefixlen, Address **ret) { |
| Link *link; |
| |
| assert(manager); |
| assert(IN_SET(family, AF_INET, AF_INET6)); |
| assert(address); |
| |
| HASHMAP_FOREACH(link, manager->links_by_index) { |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
| continue; |
| |
| if (link_get_address(link, family, address, prefixlen, ret) >= 0) |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |
| |
| bool manager_has_address(Manager *manager, int family, const union in_addr_union *address, bool check_ready) { |
| Address *a; |
| |
| assert(manager); |
| assert(IN_SET(family, AF_INET, AF_INET6)); |
| assert(address); |
| |
| if (manager_get_address(manager, family, address, 0, &a) < 0) |
| return false; |
| |
| return check_ready ? address_is_ready(a) : address_exists(a); |
| } |
| |
| const char* format_lifetime(char *buf, size_t l, usec_t lifetime_usec) { |
| assert(buf); |
| assert(l > 4); |
| |
| if (lifetime_usec == USEC_INFINITY) |
| return "forever"; |
| |
| sprintf(buf, "for "); |
| /* format_timespan() never fails */ |
| assert_se(format_timespan(buf + 4, l - 4, usec_sub_unsigned(lifetime_usec, now(CLOCK_BOOTTIME)), USEC_PER_SEC)); |
| return buf; |
| } |
| |
| static void log_address_debug(const Address *address, const char *str, const Link *link) { |
| _cleanup_free_ char *state = NULL, *flags_str = NULL, *scope_str = NULL; |
| |
| assert(address); |
| assert(str); |
| assert(link); |
| |
| if (!DEBUG_LOGGING) |
| return; |
| |
| (void) network_config_state_to_string_alloc(address->state, &state); |
| |
| const char *peer = in_addr_is_set(address->family, &address->in_addr_peer) ? |
| IN_ADDR_TO_STRING(address->family, &address->in_addr_peer) : NULL; |
| |
| (void) address_flags_to_string_alloc(address->flags, address->family, &flags_str); |
| (void) route_scope_to_string_alloc(address->scope, &scope_str); |
| |
| log_link_debug(link, "%s %s address (%s): %s%s%s/%u (valid %s, preferred %s), flags: %s, scope: %s", |
| str, strna(network_config_source_to_string(address->source)), strna(state), |
| IN_ADDR_TO_STRING(address->family, &address->in_addr), |
| peer ? " peer " : "", strempty(peer), address->prefixlen, |
| FORMAT_LIFETIME(address->lifetime_valid_usec), |
| FORMAT_LIFETIME(address->lifetime_preferred_usec), |
| strna(flags_str), strna(scope_str)); |
| } |
| |
| static int address_set_netlink_message(const Address *address, sd_netlink_message *m, Link *link) { |
| uint32_t flags; |
| int r; |
| |
| assert(address); |
| assert(m); |
| assert(link); |
| |
| r = sd_rtnl_message_addr_set_prefixlen(m, address->prefixlen); |
| if (r < 0) |
| return r; |
| |
| /* On remove, only IFA_F_MANAGETEMPADDR flag for IPv6 addresses are used. But anyway, set all |
| * flags except tentative flag here unconditionally. Without setting the flag, the template |
| * addresses generated by kernel will not be removed automatically when the main address is |
| * removed. */ |
| flags = address->flags & ~IFA_F_TENTATIVE; |
| r = sd_rtnl_message_addr_set_flags(m, flags & 0xff); |
| if (r < 0) |
| return r; |
| |
| if ((flags & ~0xff) != 0) { |
| r = sd_netlink_message_append_u32(m, IFA_FLAGS, flags); |
| if (r < 0) |
| return r; |
| } |
| |
| r = netlink_message_append_in_addr_union(m, IFA_LOCAL, address->family, &address->in_addr); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EADDRNOTAVAIL) |
| log_link_message_warning_errno(link, m, r, "Could not drop address"); |
| |
| return 1; |
| } |
| |
| int address_remove(Address *address) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| Link *link; |
| int r; |
| |
| assert(address); |
| assert(IN_SET(address->family, AF_INET, AF_INET6)); |
| assert(address->link); |
| assert(address->link->ifindex > 0); |
| assert(address->link->manager); |
| assert(address->link->manager->rtnl); |
| |
| link = address->link; |
| |
| log_address_debug(address, "Removing", link); |
| |
| r = sd_rtnl_message_new_addr(link->manager->rtnl, &m, RTM_DELADDR, |
| link->ifindex, address->family); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not allocate RTM_DELADDR message: %m"); |
| |
| r = address_set_netlink_message(address, m, link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set netlink attributes: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, m, |
| address_remove_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| |
| address_enter_removing(address); |
| |
| /* The operational state is determined by address state and carrier state. Hence, if we remove |
| * an address, the operational state may be changed. */ |
| link_update_operstate(link, true); |
| return 0; |
| } |
| |
| int address_remove_and_drop(Address *address) { |
| if (!address) |
| return 0; |
| |
| address_cancel_request(address); |
| |
| if (address_exists(address)) |
| return address_remove(address); |
| |
| return address_drop(address); |
| } |
| |
| bool link_address_is_dynamic(const Link *link, const Address *address) { |
| Route *route; |
| |
| assert(link); |
| assert(address); |
| |
| if (address->lifetime_preferred_usec != USEC_INFINITY) |
| 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) { |
| if (route->source != NETWORK_CONFIG_SOURCE_FOREIGN) |
| continue; |
| |
| /* The route is not assigned yet, or already removed. Ignoring. */ |
| if (!route_exists(route)) |
| continue; |
| |
| 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; |
| } |
| |
| int link_drop_ipv6ll_addresses(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| /* IPv6LL address may be in the tentative state, and in that case networkd has not received it. |
| * So, we need to dump all IPv6 addresses. */ |
| |
| if (link_may_have_ipv6ll(link, /* check_multicast = */ false)) |
| return 0; |
| |
| r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, link->ifindex, AF_INET6); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_set_request_dump(req, true); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_call(link->manager->rtnl, req, 0, &reply); |
| if (r < 0) |
| return r; |
| |
| for (sd_netlink_message *addr = reply; addr; addr = sd_netlink_message_next(addr)) { |
| _cleanup_(address_freep) Address *a = NULL; |
| unsigned char flags, prefixlen; |
| struct in6_addr address; |
| Address *existing; |
| int ifindex; |
| |
| /* NETLINK_GET_STRICT_CHK socket option is supported since kernel 4.20. To support |
| * older kernels, we need to check ifindex here. */ |
| r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "rtnl: received address message without valid ifindex, ignoring: %m"); |
| continue; |
| } else if (link->ifindex != ifindex) |
| continue; |
| |
| r = sd_rtnl_message_addr_get_flags(addr, &flags); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "rtnl: received address message without valid flags, ignoring: %m"); |
| continue; |
| } |
| |
| r = sd_rtnl_message_addr_get_prefixlen(addr, &prefixlen); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "rtnl: received address message without prefixlen, ignoring: %m"); |
| continue; |
| } |
| |
| if (sd_netlink_message_read_in6_addr(addr, IFA_LOCAL, NULL) >= 0) |
| /* address with peer, ignoring. */ |
| continue; |
| |
| r = sd_netlink_message_read_in6_addr(addr, IFA_ADDRESS, &address); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "rtnl: received address message without valid address, ignoring: %m"); |
| continue; |
| } |
| |
| if (!in6_addr_is_link_local(&address)) |
| continue; |
| |
| r = address_new(&a); |
| if (r < 0) |
| return -ENOMEM; |
| |
| a->family = AF_INET6; |
| a->in_addr.in6 = address; |
| a->prefixlen = prefixlen; |
| a->flags = flags; |
| |
| if (address_get(link, a, &existing) < 0) { |
| r = address_add(link, a); |
| if (r < 0) |
| return r; |
| |
| existing = TAKE_PTR(a); |
| } |
| |
| r = address_remove(existing); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int link_drop_foreign_addresses(Link *link) { |
| Address *address; |
| int k, r = 0; |
| |
| assert(link); |
| assert(link->network); |
| |
| /* First, mark all addresses. */ |
| SET_FOREACH(address, link->addresses) { |
| /* We consider IPv6LL addresses to be managed by the kernel, or dropped in link_drop_ipv6ll_addresses() */ |
| if (address->family == AF_INET6 && in6_addr_is_link_local(&address->in_addr.in6)) |
| continue; |
| |
| /* Do not remove localhost address (127.0.0.1 and ::1) */ |
| if (link->flags & IFF_LOOPBACK && in_addr_is_localhost_one(address->family, &address->in_addr) > 0) |
| continue; |
| |
| /* Ignore addresses we configured. */ |
| if (address->source != NETWORK_CONFIG_SOURCE_FOREIGN) |
| continue; |
| |
| /* Ignore addresses not assigned yet or already removing. */ |
| if (!address_exists(address)) |
| continue; |
| |
| /* link_address_is_dynamic() is slightly heavy. Let's call the function only when KeepConfiguration= is set. */ |
| if (IN_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP, KEEP_CONFIGURATION_STATIC) && |
| link_address_is_dynamic(link, address) == (link->network->keep_configuration == KEEP_CONFIGURATION_DHCP)) |
| continue; |
| |
| address_mark(address); |
| } |
| |
| /* Then, unmark requested addresses. */ |
| ORDERED_HASHMAP_FOREACH(address, link->network->addresses_by_section) { |
| Address *existing; |
| |
| /* On update, the kernel ignores the address label and broadcast address. Hence we need to |
| * distinguish addresses with different labels or broadcast addresses. Thus, we need to check |
| * the existing address with address_equal(). Otherwise, the label or broadcast address |
| * change will not be applied when we reconfigure the interface. */ |
| if (address_get(link, address, &existing) >= 0 && address_equal(address, existing)) |
| address_unmark(existing); |
| } |
| |
| /* Finally, remove all marked addresses. */ |
| SET_FOREACH(address, link->addresses) { |
| if (!address_is_marked(address)) |
| continue; |
| |
| k = address_remove(address); |
| if (k < 0 && r >= 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| int link_drop_managed_addresses(Link *link) { |
| Address *address; |
| int k, r = 0; |
| |
| assert(link); |
| |
| SET_FOREACH(address, link->addresses) { |
| /* Do not touch addresses managed by kernel or other tools. */ |
| if (address->source == NETWORK_CONFIG_SOURCE_FOREIGN) |
| continue; |
| |
| /* Ignore addresses not assigned yet or already removing. */ |
| if (!address_exists(address)) |
| continue; |
| |
| k = address_remove(address); |
| if (k < 0 && r >= 0) { |
| r = k; |
| continue; |
| } |
| } |
| |
| return r; |
| } |
| |
| void link_foreignize_addresses(Link *link) { |
| Address *address; |
| |
| assert(link); |
| |
| SET_FOREACH(address, link->addresses) |
| address->source = NETWORK_CONFIG_SOURCE_FOREIGN; |
| } |
| |
| static int address_acquire(Link *link, const Address *original, Address **ret) { |
| _cleanup_(address_freep) Address *na = NULL; |
| union in_addr_union in_addr; |
| int r; |
| |
| assert(link); |
| assert(original); |
| assert(ret); |
| |
| /* Something useful was configured? just use it */ |
| if (in_addr_is_set(original->family, &original->in_addr)) { |
| *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; |
| |
| /* Pick first address in range for ourselves. */ |
| if (original->family == AF_INET) |
| in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1); |
| else if (original->family == AF_INET6) |
| in_addr.in6.s6_addr[15] |= 1; |
| |
| r = address_dup(original, &na); |
| if (r < 0) |
| return r; |
| |
| na->in_addr = in_addr; |
| |
| *ret = TAKE_PTR(na); |
| return 1; |
| } |
| |
| int address_configure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
| int r; |
| |
| assert(rtnl); |
| assert(m); |
| assert(link); |
| assert(error_msg); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_message_warning_errno(link, m, r, error_msg); |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int address_configure(const Address *address, const struct ifa_cacheinfo *c, Link *link, Request *req) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| int r; |
| |
| assert(address); |
| assert(IN_SET(address->family, AF_INET, AF_INET6)); |
| assert(c); |
| assert(link); |
| assert(link->ifindex > 0); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| assert(req); |
| |
| log_address_debug(address, "Configuring", link); |
| |
| r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &m, link->ifindex, address->family); |
| if (r < 0) |
| return r; |
| |
| r = address_set_netlink_message(address, m, link); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_message_addr_set_scope(m, address->scope); |
| if (r < 0) |
| return r; |
| |
| if (in_addr_is_set(address->family, &address->in_addr_peer)) { |
| r = netlink_message_append_in_addr_union(m, IFA_ADDRESS, address->family, &address->in_addr_peer); |
| if (r < 0) |
| return r; |
| } else if (in4_addr_is_set(&address->broadcast)) { |
| r = sd_netlink_message_append_in_addr(m, IFA_BROADCAST, &address->broadcast); |
| if (r < 0) |
| return r; |
| } |
| |
| if (address->family == AF_INET && address->label) { |
| r = sd_netlink_message_append_string(m, IFA_LABEL, address->label); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_append_cache_info(m, IFA_CACHEINFO, c); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, IFA_RT_PRIORITY, address->route_metric); |
| if (r < 0) |
| return r; |
| |
| return request_call_netlink_async(link->manager->rtnl, m, req); |
| } |
| |
| static bool address_is_ready_to_configure(Link *link, const Address *address) { |
| assert(link); |
| assert(address); |
| |
| if (!link_is_ready_to_configure(link, false)) |
| return false; |
| |
| if (!ipv4acd_bound(address)) |
| return false; |
| |
| /* Refuse adding more than the limit */ |
| if (set_size(link->addresses) >= ADDRESSES_PER_LINK_MAX) |
| return false; |
| |
| return true; |
| } |
| |
| static int address_process_request(Request *req, Link *link, Address *address) { |
| struct ifa_cacheinfo c; |
| int r; |
| |
| assert(req); |
| assert(link); |
| assert(address); |
| |
| if (!address_is_ready_to_configure(link, address)) |
| return 0; |
| |
| address_set_cinfo(link->manager, address, &c); |
| if (c.ifa_valid == 0) { |
| log_link_debug(link, "Refuse to configure %s address %s, as its valid lifetime is zero.", |
| network_config_source_to_string(address->source), |
| IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen)); |
| address_cancel_requesting(address); |
| return 1; |
| } |
| |
| r = address_configure(address, &c, link, req); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to configure address: %m"); |
| |
| address_enter_configuring(address); |
| return 1; |
| } |
| |
| int link_request_address( |
| Link *link, |
| Address *address, |
| bool consume_object, |
| unsigned *message_counter, |
| address_netlink_handler_t netlink_handler, |
| Request **ret) { |
| |
| Address *acquired, *existing = NULL; |
| int r; |
| |
| assert(link); |
| assert(address); |
| assert(address->source != NETWORK_CONFIG_SOURCE_FOREIGN); |
| |
| r = address_acquire(link, address, &acquired); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to acquire an address from pool: %m"); |
| if (r > 0) { |
| if (consume_object) |
| address_free(address); |
| |
| address = acquired; |
| consume_object = true; |
| } |
| |
| if (address_needs_to_set_broadcast(address, link)) { |
| if (!consume_object) { |
| Address *a; |
| |
| r = address_dup(address, &a); |
| if (r < 0) |
| return r; |
| |
| address = a; |
| consume_object = true; |
| } |
| |
| address_set_broadcast(address, link); |
| } |
| |
| (void) address_get(link, address, &existing); |
| |
| if (address->lifetime_valid_usec == 0) { |
| if (consume_object) |
| address_free(address); |
| |
| /* The requested address is outdated. Let's remove it. */ |
| return address_remove_and_drop(existing); |
| } |
| |
| if (!existing) { |
| _cleanup_(address_freep) Address *tmp = NULL; |
| |
| if (consume_object) |
| tmp = address; |
| else { |
| r = address_dup(address, &tmp); |
| if (r < 0) |
| return r; |
| } |
| |
| /* Consider address tentative until we get the real flags from the kernel */ |
| tmp->flags |= IFA_F_TENTATIVE; |
| |
| r = address_add(link, tmp); |
| if (r < 0) |
| return r; |
| |
| existing = TAKE_PTR(tmp); |
| } else { |
| r = address_equalify(existing, address); |
| if (r < 0) |
| return r; |
| existing->source = address->source; |
| existing->provider = address->provider; |
| existing->duplicate_address_detection = address->duplicate_address_detection; |
| existing->lifetime_valid_usec = address->lifetime_valid_usec; |
| existing->lifetime_preferred_usec = address->lifetime_preferred_usec; |
| if (consume_object) |
| address_free(address); |
| } |
| |
| r = ipv4acd_configure(existing); |
| if (r < 0) |
| return r; |
| |
| log_address_debug(existing, "Requesting", link); |
| r = link_queue_request_safe(link, REQUEST_TYPE_ADDRESS, |
| existing, NULL, |
| address_hash_func, |
| address_compare_func, |
| address_process_request, |
| message_counter, netlink_handler, ret); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to request address: %m"); |
| if (r == 0) |
| return 0; |
| |
| address_enter_requesting(existing); |
| |
| return 1; |
| } |
| |
| static int static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, Address *address) { |
| int r; |
| |
| assert(link); |
| |
| r = address_configure_handler_internal(rtnl, m, link, "Failed to set static address"); |
| if (r <= 0) |
| return r; |
| |
| if (link->static_address_messages == 0) { |
| log_link_debug(link, "Addresses set"); |
| link->static_addresses_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| int link_request_static_address(Link *link, Address *address, bool consume) { |
| assert(link); |
| assert(address); |
| assert(address->source == NETWORK_CONFIG_SOURCE_STATIC); |
| |
| return link_request_address(link, address, consume, &link->static_address_messages, |
| static_address_handler, NULL); |
| } |
| |
| int link_request_static_addresses(Link *link) { |
| Address *a; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| link->static_addresses_configured = false; |
| |
| ORDERED_HASHMAP_FOREACH(a, link->network->addresses_by_section) { |
| r = link_request_static_address(link, a, false); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_request_radv_addresses(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_dhcp_server_address(link); |
| if (r < 0) |
| return r; |
| |
| if (link->static_address_messages == 0) { |
| link->static_addresses_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Setting addresses"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 0; |
| } |
| |
| void address_cancel_request(Address *address) { |
| Request req; |
| |
| assert(address); |
| assert(address->link); |
| |
| if (!address_is_requesting(address)) |
| return; |
| |
| req = (Request) { |
| .link = address->link, |
| .type = REQUEST_TYPE_ADDRESS, |
| .userdata = address, |
| .hash_func = (hash_func_t) address_hash_func, |
| .compare_func = (compare_func_t) address_compare_func, |
| }; |
| |
| request_detach(address->link->manager, &req); |
| address_cancel_requesting(address); |
| } |
| |
| int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) { |
| _cleanup_(address_freep) Address *tmp = NULL; |
| struct ifa_cacheinfo cinfo; |
| Link *link = NULL; |
| uint16_t type; |
| Address *address = NULL; |
| int ifindex, r; |
| |
| 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_by_index(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_netlink_message_read_u32(message, IFA_FLAGS, &tmp->flags); |
| if (r == -ENODATA) { |
| unsigned char flags; |
| |
| /* For old kernels. */ |
| r = sd_rtnl_message_addr_get_flags(message, &flags); |
| if (r >= 0) |
| tmp->flags = flags; |
| } |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received address message without flags, ignoring: %m"); |
| return 0; |
| } |
| |
| 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; |
| } |
| |
| 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; |
| } |
| } 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(); |
| } |
| |
| r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m"); |
| return 0; |
| } |
| |
| (void) address_get(link, tmp, &address); |
| |
| switch (type) { |
| case RTM_NEWADDR: |
| if (address) { |
| /* update flags and etc. */ |
| r = address_equalify(address, tmp); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to update properties of address %s, ignoring: %m", |
| IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen)); |
| return 0; |
| } |
| address->flags = tmp->flags; |
| address->scope = tmp->scope; |
| address_set_lifetime(m, address, &cinfo); |
| address_enter_configured(address); |
| log_address_debug(address, "Received updated", link); |
| } else { |
| address_set_lifetime(m, tmp, &cinfo); |
| address_enter_configured(tmp); |
| log_address_debug(tmp, "Received new", link); |
| |
| r = address_add(link, tmp); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to remember foreign address %s, ignoring: %m", |
| IN_ADDR_PREFIX_TO_STRING(tmp->family, &tmp->in_addr, tmp->prefixlen)); |
| return 0; |
| } |
| |
| address = TAKE_PTR(tmp); |
| } |
| |
| /* address_update() logs internally, so we don't need to here. */ |
| r = address_update(address); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| break; |
| |
| case RTM_DELADDR: |
| if (address) { |
| address_enter_removed(address); |
| log_address_debug(address, address->state == 0 ? "Forgetting" : "Removed", link); |
| (void) address_drop(address); |
| } else |
| log_address_debug(tmp, "Kernel removed unknown", link); |
| |
| break; |
| |
| default: |
| assert_not_reached(); |
| } |
| |
| return 1; |
| } |
| |
| 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; |
| union in_addr_union u; |
| 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 (isempty(rvalue)) { |
| /* The broadcast address will be calculated based on Address=, and set if the link is |
| * not a wireguard interface. Here, we do not check or set n->family. */ |
| n->broadcast = (struct in_addr) {}; |
| n->set_broadcast = -1; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| r = parse_boolean(rvalue); |
| if (r >= 0) { |
| /* The broadcast address will be calculated based on Address=. Here, we do not check or |
| * set n->family. */ |
| n->broadcast = (struct in_addr) {}; |
| n->set_broadcast = r; |
| TAKE_PTR(n); |
| 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, &u); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Broadcast is invalid, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| if (in4_addr_is_null(&u.in)) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Broadcast cannot be ANY address, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| n->broadcast = u.in; |
| n->set_broadcast = true; |
| n->family = AF_INET; |
| TAKE_PTR(n); |
| |
| 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) { |
| r = in_addr_prefix_from_string_auto(rvalue, &f, &buffer, &prefixlen); |
| if (r >= 0) |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "An address '%s' is specified without prefix length. Assuming the prefix length is %u." |
| "Please specify the prefix length explicitly.", rvalue, 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; |
| |
| TAKE_PTR(n); |
| 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(); |
| |
| TAKE_PTR(n); |
| 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; |
| usec_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 = USEC_INFINITY; |
| 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->lifetime_preferred_usec = 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); |
| |
| TAKE_PTR(n); |
| 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; |
| } |
| |
| r = route_scope_from_string(rvalue); |
| 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 = r; |
| n->scope_set = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_address_route_metric( |
| 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 = safe_atou32(rvalue, &n->route_metric); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse %s=, ignoring assignment: %s", lvalue, rvalue); |
| return 0; |
| } |
| |
| TAKE_PTR(n); |
| 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; |
| 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; |
| } |
| |
| AddressFamily a = duplicate_address_detection_address_family_from_string(rvalue); |
| if (a < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, a, |
| "Failed to parse %s=, ignoring: %s", lvalue, rvalue); |
| return 0; |
| } |
| n->duplicate_address_detection = a; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_address_netlabel( |
| 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); |
| assert(network); |
| |
| 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 = config_parse_string(unit, filename, line, section, section_line, |
| lvalue, CONFIG_PARSE_STRING_SAFE, rvalue, &n->netlabel, network); |
| if (r < 0) |
| return r; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| 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); |
| } |
| |
| assert(IN_SET(address->family, AF_INET, AF_INET6)); |
| |
| if (in4_addr_is_set(&address->broadcast) && |
| (address->family == AF_INET6 || address->prefixlen > 30 || |
| in_addr_is_set(address->family, &address->in_addr_peer))) { |
| log_warning("%s: broadcast address is set for an IPv6 address, " |
| "an IPv4 address with peer address, or with prefix length 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 (!address->scope_set) { |
| if (in_addr_is_localhost(address->family, &address->in_addr) > 0) |
| address->scope = RT_SCOPE_HOST; |
| else if (in_addr_is_link_local(address->family, &address->in_addr) > 0) |
| address->scope = RT_SCOPE_LINK; |
| } |
| |
| if (address->duplicate_address_detection < 0) { |
| if (address->family == AF_INET6) |
| address->duplicate_address_detection = ADDRESS_FAMILY_IPV6; |
| else if (in4_addr_is_link_local(&address->in_addr.in)) |
| address->duplicate_address_detection = ADDRESS_FAMILY_IPV4; |
| else |
| address->duplicate_address_detection = ADDRESS_FAMILY_NO; |
| } else if (address->duplicate_address_detection == ADDRESS_FAMILY_IPV6 && address->family == AF_INET) |
| log_warning("%s: DuplicateAddressDetection=ipv6 is specified for IPv4 address, ignoring.", |
| address->section->filename); |
| else if (address->duplicate_address_detection == ADDRESS_FAMILY_IPV4 && address->family == AF_INET6) |
| log_warning("%s: DuplicateAddressDetection=ipv4 is specified for IPv6 address, ignoring.", |
| address->section->filename); |
| |
| if (address->family == AF_INET6 && |
| !FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV6)) |
| address->flags |= IFA_F_NODAD; |
| |
| return 0; |
| } |
| |
| int network_drop_invalid_addresses(Network *network) { |
| _cleanup_set_free_ Set *addresses = NULL; |
| Address *address; |
| int r; |
| |
| assert(network); |
| |
| ORDERED_HASHMAP_FOREACH(address, network->addresses_by_section) { |
| Address *dup; |
| |
| if (address_section_verify(address) < 0) { |
| /* Drop invalid [Address] sections or Address= settings in [Network]. |
| * Note that address_free() will drop the address from addresses_by_section. */ |
| address_free(address); |
| continue; |
| } |
| |
| /* Always use the setting specified later. So, remove the previously assigned setting. */ |
| dup = set_remove(addresses, address); |
| if (dup) { |
| log_warning("%s: Duplicated address %s is specified at line %u and %u, " |
| "dropping the address setting specified at line %u.", |
| dup->section->filename, |
| IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen), |
| address->section->line, |
| dup->section->line, dup->section->line); |
| /* address_free() will drop the address from addresses_by_section. */ |
| address_free(dup); |
| } |
| |
| /* Use address_kernel_hash_ops, instead of address_kernel_hash_ops_free. Otherwise, the |
| * Address objects will be freed. */ |
| r = set_ensure_put(&addresses, &address_kernel_hash_ops, address); |
| if (r < 0) |
| return log_oom(); |
| assert(r > 0); |
| } |
| |
| return 0; |
| } |
