/* SPDX-License-Identifier: LGPL-2.1-or-later */ /*** Copyright © 2017 Intel Corporation. All rights reserved. ***/ #include #include #include "dns-domain.h" #include "networkd-address-generation.h" #include "networkd-address.h" #include "networkd-dhcp-prefix-delegation.h" #include "networkd-link.h" #include "networkd-manager.h" #include "networkd-network.h" #include "networkd-queue.h" #include "networkd-radv.h" #include "networkd-route-util.h" #include "parse-util.h" #include "radv-internal.h" #include "string-util.h" #include "string-table.h" #include "strv.h" void network_adjust_radv(Network *network) { assert(network); /* After this function is called, network->router_prefix_delegation can be treated as a boolean. */ if (network->dhcp_pd < 0) /* For backward compatibility. */ network->dhcp_pd = FLAGS_SET(network->router_prefix_delegation, RADV_PREFIX_DELEGATION_DHCP6); if (!FLAGS_SET(network->link_local, ADDRESS_FAMILY_IPV6)) { if (network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE) log_warning("%s: IPv6PrefixDelegation= is enabled but IPv6 link-local addressing is disabled. " "Disabling IPv6PrefixDelegation=.", network->filename); network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE; } if (network->router_prefix_delegation == RADV_PREFIX_DELEGATION_NONE) { network->n_router_dns = 0; network->router_dns = mfree(network->router_dns); network->router_search_domains = ordered_set_free(network->router_search_domains); } if (!FLAGS_SET(network->router_prefix_delegation, RADV_PREFIX_DELEGATION_STATIC)) { network->prefixes_by_section = hashmap_free_with_destructor(network->prefixes_by_section, prefix_free); network->route_prefixes_by_section = hashmap_free_with_destructor(network->route_prefixes_by_section, route_prefix_free); network->pref64_prefixes_by_section = hashmap_free_with_destructor(network->pref64_prefixes_by_section, pref64_prefix_free); } } bool link_radv_enabled(Link *link) { assert(link); if (!link_may_have_ipv6ll(link, /* check_multicast = */ true)) return false; if (link->hw_addr.length != ETH_ALEN) return false; return link->network->router_prefix_delegation; } Prefix *prefix_free(Prefix *prefix) { if (!prefix) return NULL; if (prefix->network) { assert(prefix->section); hashmap_remove(prefix->network->prefixes_by_section, prefix->section); } config_section_free(prefix->section); set_free(prefix->tokens); return mfree(prefix); } DEFINE_SECTION_CLEANUP_FUNCTIONS(Prefix, prefix_free); static int prefix_new_static(Network *network, const char *filename, unsigned section_line, Prefix **ret) { _cleanup_(config_section_freep) ConfigSection *n = NULL; _cleanup_(prefix_freep) Prefix *prefix = 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; prefix = hashmap_get(network->prefixes_by_section, n); if (prefix) { *ret = TAKE_PTR(prefix); return 0; } prefix = new(Prefix, 1); if (!prefix) return -ENOMEM; *prefix = (Prefix) { .network = network, .section = TAKE_PTR(n), .preferred_lifetime = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, .valid_lifetime = RADV_DEFAULT_VALID_LIFETIME_USEC, .onlink = true, .address_auto_configuration = true, }; r = hashmap_ensure_put(&network->prefixes_by_section, &config_section_hash_ops, prefix->section, prefix); if (r < 0) return r; *ret = TAKE_PTR(prefix); return 0; } RoutePrefix *route_prefix_free(RoutePrefix *prefix) { if (!prefix) return NULL; if (prefix->network) { assert(prefix->section); hashmap_remove(prefix->network->route_prefixes_by_section, prefix->section); } config_section_free(prefix->section); return mfree(prefix); } DEFINE_SECTION_CLEANUP_FUNCTIONS(RoutePrefix, route_prefix_free); static int route_prefix_new_static(Network *network, const char *filename, unsigned section_line, RoutePrefix **ret) { _cleanup_(config_section_freep) ConfigSection *n = NULL; _cleanup_(route_prefix_freep) RoutePrefix *prefix = 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; prefix = hashmap_get(network->route_prefixes_by_section, n); if (prefix) { *ret = TAKE_PTR(prefix); return 0; } prefix = new(RoutePrefix, 1); if (!prefix) return -ENOMEM; *prefix = (RoutePrefix) { .network = network, .section = TAKE_PTR(n), .lifetime = RADV_DEFAULT_VALID_LIFETIME_USEC, }; r = hashmap_ensure_put(&network->route_prefixes_by_section, &config_section_hash_ops, prefix->section, prefix); if (r < 0) return r; *ret = TAKE_PTR(prefix); return 0; } pref64Prefix *pref64_prefix_free(pref64Prefix *prefix) { if (!prefix) return NULL; if (prefix->network) { assert(prefix->section); hashmap_remove(prefix->network->pref64_prefixes_by_section, prefix->section); } config_section_free(prefix->section); return mfree(prefix); } DEFINE_SECTION_CLEANUP_FUNCTIONS(pref64Prefix, pref64_prefix_free); static int pref64_prefix_new_static(Network *network, const char *filename, unsigned section_line, pref64Prefix **ret) { _cleanup_(config_section_freep) ConfigSection *n = NULL; _cleanup_(pref64_prefix_freep) pref64Prefix *prefix = 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; prefix = hashmap_get(network->pref64_prefixes_by_section, n); if (prefix) { *ret = TAKE_PTR(prefix); return 0; } prefix = new(pref64Prefix, 1); if (!prefix) return -ENOMEM; *prefix = (pref64Prefix) { .network = network, .section = TAKE_PTR(n), .lifetime = RADV_PREF64_DEFAULT_LIFETIME_USEC, }; r = hashmap_ensure_put(&network->pref64_prefixes_by_section, &config_section_hash_ops, prefix->section, prefix); if (r < 0) return r; *ret = TAKE_PTR(prefix); return 0; } int link_request_radv_addresses(Link *link) { Prefix *p; int r; assert(link); if (!link_radv_enabled(link)) return 0; HASHMAP_FOREACH(p, link->network->prefixes_by_section) { _cleanup_set_free_ Set *addresses = NULL; struct in6_addr *a; if (!p->assign) continue; /* radv_generate_addresses() below requires the prefix length <= 64. */ if (p->prefixlen > 64) continue; r = radv_generate_addresses(link, p->tokens, &p->prefix, p->prefixlen, &addresses); if (r < 0) return r; SET_FOREACH(a, addresses) { _cleanup_(address_unrefp) Address *address = NULL; r = address_new(&address); if (r < 0) return -ENOMEM; address->source = NETWORK_CONFIG_SOURCE_STATIC; address->family = AF_INET6; address->in_addr.in6 = *a; address->prefixlen = p->prefixlen; address->route_metric = p->route_metric; r = link_request_static_address(link, address); if (r < 0) return r; } } return 0; } static int radv_set_prefix(Link *link, Prefix *prefix) { _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL; int r; assert(link); assert(link->radv); assert(prefix); r = sd_radv_prefix_new(&p); if (r < 0) return r; r = sd_radv_prefix_set_prefix(p, &prefix->prefix, prefix->prefixlen); if (r < 0) return r; r = sd_radv_prefix_set_preferred_lifetime(p, prefix->preferred_lifetime, USEC_INFINITY); if (r < 0) return r; r = sd_radv_prefix_set_valid_lifetime(p, prefix->valid_lifetime, USEC_INFINITY); if (r < 0) return r; r = sd_radv_prefix_set_onlink(p, prefix->onlink); if (r < 0) return r; r = sd_radv_prefix_set_address_autoconfiguration(p, prefix->address_auto_configuration); if (r < 0) return r; return sd_radv_add_prefix(link->radv, p); } static int radv_set_route_prefix(Link *link, RoutePrefix *prefix) { _cleanup_(sd_radv_route_prefix_unrefp) sd_radv_route_prefix *p = NULL; int r; assert(link); assert(link->radv); assert(prefix); r = sd_radv_route_prefix_new(&p); if (r < 0) return r; r = sd_radv_route_prefix_set_prefix(p, &prefix->prefix, prefix->prefixlen); if (r < 0) return r; r = sd_radv_route_prefix_set_lifetime(p, prefix->lifetime, USEC_INFINITY); if (r < 0) return r; return sd_radv_add_route_prefix(link->radv, p); } static int radv_set_pref64_prefix(Link *link, pref64Prefix *prefix) { _cleanup_(sd_radv_pref64_prefix_unrefp) sd_radv_pref64_prefix *p = NULL; int r; assert(link); assert(link->radv); assert(prefix); r = sd_radv_pref64_prefix_new(&p); if (r < 0) return r; r = sd_radv_pref64_prefix_set_prefix(p, &prefix->prefix, prefix->prefixlen, prefix->lifetime); if (r < 0) return r; return sd_radv_add_pref64_prefix(link->radv, p); } static int network_get_ipv6_dns(Network *network, struct in6_addr **ret_addresses, size_t *ret_size) { _cleanup_free_ struct in6_addr *addresses = NULL; size_t n_addresses = 0; assert(network); assert(ret_addresses); assert(ret_size); for (size_t i = 0; i < network->n_dns; i++) { union in_addr_union *addr; if (network->dns[i]->family != AF_INET6) continue; addr = &network->dns[i]->address; if (in_addr_is_null(AF_INET6, addr) || in_addr_is_link_local(AF_INET6, addr) || in_addr_is_localhost(AF_INET6, addr)) continue; if (!GREEDY_REALLOC(addresses, n_addresses + 1)) return -ENOMEM; addresses[n_addresses++] = addr->in6; } *ret_addresses = TAKE_PTR(addresses); *ret_size = n_addresses; return n_addresses; } static int radv_set_dns(Link *link, Link *uplink) { _cleanup_free_ struct in6_addr *dns = NULL; size_t n_dns; int r; if (!link->network->router_emit_dns) return 0; if (link->network->router_dns) { struct in6_addr *p; dns = new(struct in6_addr, link->network->n_router_dns); if (!dns) return -ENOMEM; p = dns; for (size_t i = 0; i < link->network->n_router_dns; i++) if (in6_addr_is_null(&link->network->router_dns[i])) { if (in6_addr_is_set(&link->ipv6ll_address)) *(p++) = link->ipv6ll_address; } else *(p++) = link->network->router_dns[i]; n_dns = p - dns; goto set_dns; } r = network_get_ipv6_dns(link->network, &dns, &n_dns); if (r > 0) goto set_dns; if (uplink) { assert(uplink->network); r = network_get_ipv6_dns(uplink->network, &dns, &n_dns); if (r > 0) goto set_dns; } return 0; set_dns: return sd_radv_set_rdnss(link->radv, link->network->router_dns_lifetime_usec, dns, n_dns); } static int radv_set_domains(Link *link, Link *uplink) { _cleanup_free_ char **s = NULL; /* just free() because the strings are owned by the set */ OrderedSet *search_domains; if (!link->network->router_emit_domains) return 0; search_domains = link->network->router_search_domains; if (search_domains) goto set_domains; search_domains = link->network->search_domains; if (search_domains) goto set_domains; if (uplink) { assert(uplink->network); search_domains = uplink->network->search_domains; if (search_domains) goto set_domains; } return 0; set_domains: s = ordered_set_get_strv(search_domains); if (!s) return log_oom(); return sd_radv_set_dnssl(link->radv, link->network->router_dns_lifetime_usec, s); } static int radv_find_uplink(Link *link, Link **ret) { int r; assert(link); if (link->network->router_uplink_name) return link_get_by_name(link->manager, link->network->router_uplink_name, ret); if (link->network->router_uplink_index > 0) return link_get_by_index(link->manager, link->network->router_uplink_index, ret); if (link->network->router_uplink_index == UPLINK_INDEX_AUTO) { if (link_dhcp_pd_is_enabled(link)) r = dhcp_pd_find_uplink(link, ret); /* When DHCP-PD is enabled, use its uplink. */ else r = manager_find_uplink(link->manager, AF_INET6, link, ret); if (r < 0) /* It is not necessary to propagate error in automatic selection. */ *ret = NULL; return 0; } *ret = NULL; return 0; } static int radv_configure(Link *link) { Link *uplink = NULL; RoutePrefix *q; pref64Prefix *n; Prefix *p; int r; assert(link); assert(link->network); if (link->radv) return -EBUSY; r = sd_radv_new(&link->radv); if (r < 0) return r; r = sd_radv_attach_event(link->radv, link->manager->event, 0); if (r < 0) return r; if (link->hw_addr.length == ETH_ALEN) { r = sd_radv_set_mac(link->radv, &link->hw_addr.ether); if (r < 0) return r; } r = sd_radv_set_ifindex(link->radv, link->ifindex); if (r < 0) return r; r = sd_radv_set_managed_information(link->radv, link->network->router_managed); if (r < 0) return r; r = sd_radv_set_other_information(link->radv, link->network->router_other_information); if (r < 0) return r; r = sd_radv_set_router_lifetime(link->radv, link->network->router_lifetime_usec); if (r < 0) return r; r = sd_radv_set_hop_limit(link->radv, link->network->router_hop_limit); if (r < 0) return r; if (link->network->router_lifetime_usec > 0) { r = sd_radv_set_preference(link->radv, link->network->router_preference); if (r < 0) return r; } if (link->network->router_retransmit_usec > 0) { r = sd_radv_set_retransmit(link->radv, link->network->router_retransmit_usec); if (r < 0) return r; } HASHMAP_FOREACH(p, link->network->prefixes_by_section) { r = radv_set_prefix(link, p); if (r < 0 && r != -EEXIST) return r; } HASHMAP_FOREACH(q, link->network->route_prefixes_by_section) { r = radv_set_route_prefix(link, q); if (r < 0 && r != -EEXIST) return r; } HASHMAP_FOREACH(n, link->network->pref64_prefixes_by_section) { r = radv_set_pref64_prefix(link, n); if (r < 0 && r != -EEXIST) return r; } (void) radv_find_uplink(link, &uplink); r = radv_set_dns(link, uplink); if (r < 0) return log_link_debug_errno(link, r, "Could not set RA DNS: %m"); r = radv_set_domains(link, uplink); if (r < 0) return log_link_debug_errno(link, r, "Could not set RA Domains: %m"); r = sd_radv_set_home_agent_information(link->radv, link->network->router_home_agent_information); if (r < 0) return r; r = sd_radv_set_home_agent_preference(link->radv, link->network->router_home_agent_preference); if (r < 0) return r; r = sd_radv_set_home_agent_lifetime(link->radv, link->network->home_agent_lifetime_usec); if (r < 0) return r; return 0; } int radv_update_mac(Link *link) { bool restart; int r; assert(link); if (!link->radv) return 0; if (link->hw_addr.length != ETH_ALEN) return 0; restart = sd_radv_is_running(link->radv); r = sd_radv_stop(link->radv); if (r < 0) return r; r = sd_radv_set_mac(link->radv, &link->hw_addr.ether); if (r < 0) return r; if (restart) { r = sd_radv_start(link->radv); if (r < 0) return r; } return 0; } static int radv_is_ready_to_configure(Link *link) { bool needs_uplink = false; int r; assert(link); assert(link->network); if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false)) return false; if (in6_addr_is_null(&link->ipv6ll_address)) return false; if (link->hw_addr.length != ETH_ALEN || hw_addr_is_null(&link->hw_addr)) return false; if (link->network->router_emit_dns && !link->network->router_dns) { _cleanup_free_ struct in6_addr *dns = NULL; size_t n_dns; r = network_get_ipv6_dns(link->network, &dns, &n_dns); if (r < 0) return r; needs_uplink = r == 0; } if (link->network->router_emit_domains && !link->network->router_search_domains && !link->network->search_domains) needs_uplink = true; if (needs_uplink) { Link *uplink = NULL; if (radv_find_uplink(link, &uplink) < 0) return false; if (uplink && !uplink->network) return false; } return true; } static int radv_process_request(Request *req, Link *link, void *userdata) { int r; assert(link); r = radv_is_ready_to_configure(link); if (r <= 0) return r; r = radv_configure(link); if (r < 0) return log_link_warning_errno(link, r, "Failed to configure IPv6 Router Advertisement engine: %m"); if (link_has_carrier(link)) { r = radv_start(link); if (r < 0) return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m"); } log_link_debug(link, "IPv6 Router Advertisement engine is configured%s.", link_has_carrier(link) ? " and started" : ""); return 1; } int link_request_radv(Link *link) { int r; assert(link); if (!link_radv_enabled(link)) return 0; if (link->radv) return 0; r = link_queue_request(link, REQUEST_TYPE_RADV, radv_process_request, NULL); if (r < 0) return log_link_warning_errno(link, r, "Failed to request configuring of the IPv6 Router Advertisement engine: %m"); log_link_debug(link, "Requested configuring of the IPv6 Router Advertisement engine."); return 0; } int radv_start(Link *link) { int r; assert(link); assert(link->network); if (!link->radv) return 0; if (!link_has_carrier(link)) return 0; if (in6_addr_is_null(&link->ipv6ll_address)) return 0; if (sd_radv_is_running(link->radv)) return 0; if (link->network->dhcp_pd_announce) { r = dhcp_request_prefix_delegation(link); if (r < 0) return log_link_debug_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m"); } log_link_debug(link, "Starting IPv6 Router Advertisements"); return sd_radv_start(link->radv); } int radv_add_prefix( Link *link, const struct in6_addr *prefix, uint8_t prefix_len, usec_t lifetime_preferred_usec, usec_t lifetime_valid_usec) { _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL; int r; assert(link); if (!link->radv) return 0; r = sd_radv_prefix_new(&p); if (r < 0) return r; r = sd_radv_prefix_set_prefix(p, prefix, prefix_len); if (r < 0) return r; r = sd_radv_prefix_set_preferred_lifetime(p, RADV_DEFAULT_PREFERRED_LIFETIME_USEC, lifetime_preferred_usec); if (r < 0) return r; r = sd_radv_prefix_set_valid_lifetime(p, RADV_DEFAULT_VALID_LIFETIME_USEC, lifetime_valid_usec); if (r < 0) return r; r = sd_radv_add_prefix(link->radv, p); if (r < 0 && r != -EEXIST) return r; return 0; } static int prefix_section_verify(Prefix *p) { assert(p); if (section_is_invalid(p->section)) return -EINVAL; if (in6_addr_is_null(&p->prefix)) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: [IPv6Prefix] section without Prefix= field configured, " "or specified prefix is the null address. " "Ignoring [IPv6Prefix] section from line %u.", p->section->filename, p->section->line); if (p->prefixlen < 3 || p->prefixlen > 128) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: Invalid prefix length %u is specified in [IPv6Prefix] section. " "Valid range is 3…128. Ignoring [IPv6Prefix] section from line %u.", p->section->filename, p->prefixlen, p->section->line); if (p->prefixlen > 64) { log_info("%s:%u: Unusual prefix length %u (> 64) is specified in [IPv6Prefix] section from line %s%s.", p->section->filename, p->section->line, p->prefixlen, p->assign ? ", refusing to assign an address in " : "", p->assign ? IN6_ADDR_PREFIX_TO_STRING(&p->prefix, p->prefixlen) : ""); p->assign = false; } if (p->valid_lifetime == 0) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: The valid lifetime of prefix cannot be zero. " "Ignoring [IPv6Prefix] section from line %u.", p->section->filename, p->section->line); if (p->preferred_lifetime > p->valid_lifetime) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: The preferred lifetime %s is longer than the valid lifetime %s. " "Ignoring [IPv6Prefix] section from line %u.", p->section->filename, FORMAT_TIMESPAN(p->preferred_lifetime, USEC_PER_SEC), FORMAT_TIMESPAN(p->valid_lifetime, USEC_PER_SEC), p->section->line); return 0; } void network_drop_invalid_prefixes(Network *network) { Prefix *p; assert(network); HASHMAP_FOREACH(p, network->prefixes_by_section) if (prefix_section_verify(p) < 0) prefix_free(p); } static int route_prefix_section_verify(RoutePrefix *p) { if (section_is_invalid(p->section)) return -EINVAL; if (p->prefixlen > 128) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: Invalid prefix length %u is specified in [IPv6RoutePrefix] section. " "Valid range is 0…128. Ignoring [IPv6RoutePrefix] section from line %u.", p->section->filename, p->prefixlen, p->section->line); if (p->lifetime == 0) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: The lifetime of route cannot be zero. " "Ignoring [IPv6RoutePrefix] section from line %u.", p->section->filename, p->section->line); return 0; } void network_drop_invalid_route_prefixes(Network *network) { RoutePrefix *p; assert(network); HASHMAP_FOREACH(p, network->route_prefixes_by_section) if (route_prefix_section_verify(p) < 0) route_prefix_free(p); } void network_drop_invalid_pref64_prefixes(Network *network) { pref64Prefix *p; assert(network); HASHMAP_FOREACH(p, network->pref64_prefixes_by_section) if (section_is_invalid(p->section)) pref64_prefix_free(p); } int config_parse_prefix( 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_(prefix_free_or_set_invalidp) Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); union in_addr_union a; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = in_addr_prefix_from_string(rvalue, AF_INET6, &a, &p->prefixlen); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue); return 0; } (void) in6_addr_mask(&a.in6, p->prefixlen); p->prefix = a.in6; TAKE_PTR(p); return 0; } int config_parse_prefix_boolean( 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_(prefix_free_or_set_invalidp) Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = parse_boolean(rvalue); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue); return 0; } if (streq(lvalue, "OnLink")) p->onlink = r; else if (streq(lvalue, "AddressAutoconfiguration")) p->address_auto_configuration = r; else if (streq(lvalue, "Assign")) p->assign = r; else assert_not_reached(); TAKE_PTR(p); return 0; } int config_parse_prefix_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) { _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); usec_t usec; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = parse_sec(rvalue, &usec); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Lifetime is invalid, ignoring assignment: %s", rvalue); return 0; } if (usec != USEC_INFINITY && DIV_ROUND_UP(usec, USEC_PER_SEC) >= UINT32_MAX) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Lifetime is too long, ignoring assignment: %s", rvalue); return 0; } if (streq(lvalue, "PreferredLifetimeSec")) p->preferred_lifetime = usec; else if (streq(lvalue, "ValidLifetimeSec")) p->valid_lifetime = usec; else assert_not_reached(); TAKE_PTR(p); return 0; } int config_parse_prefix_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) { _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = safe_atou32(rvalue, &p->route_metric); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue); return 0; } TAKE_PTR(p); return 0; } int config_parse_prefix_token( 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_(prefix_free_or_set_invalidp) Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = config_parse_address_generation_type(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &p->tokens, userdata); if (r < 0) return r; TAKE_PTR(p); return 0; } int config_parse_route_prefix( 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_(route_prefix_free_or_set_invalidp) RoutePrefix *p = NULL; Network *network = ASSERT_PTR(userdata); union in_addr_union a; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = route_prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = in_addr_prefix_from_string(rvalue, AF_INET6, &a, &p->prefixlen); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Route prefix is invalid, ignoring assignment: %s", rvalue); return 0; } (void) in6_addr_mask(&a.in6, p->prefixlen); p->prefix = a.in6; TAKE_PTR(p); return 0; } int config_parse_route_prefix_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) { _cleanup_(route_prefix_free_or_set_invalidp) RoutePrefix *p = NULL; Network *network = ASSERT_PTR(userdata); usec_t usec; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = route_prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = parse_sec(rvalue, &usec); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Route lifetime is invalid, ignoring assignment: %s", rvalue); return 0; } if (usec != USEC_INFINITY && DIV_ROUND_UP(usec, USEC_PER_SEC) >= UINT32_MAX) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Lifetime is too long, ignoring assignment: %s", rvalue); return 0; } p->lifetime = usec; TAKE_PTR(p); return 0; } int config_parse_pref64_prefix( 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_(pref64_prefix_free_or_set_invalidp) pref64Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); union in_addr_union a; uint8_t prefixlen; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = pref64_prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = in_addr_prefix_from_string(rvalue, AF_INET6, &a, &prefixlen); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "PREF64 prefix is invalid, ignoring assignment: %s", rvalue); return 0; } if (!IN_SET(prefixlen, 96, 64, 56, 48, 40, 32)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "PREF64 prefixlen is invalid, ignoring assignment: %s", rvalue); return 0; } (void) in6_addr_mask(&a.in6,prefixlen); p->prefix = a.in6; p->prefixlen = prefixlen; TAKE_PTR(p); return 0; } int config_parse_pref64_prefix_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) { _cleanup_(pref64_prefix_free_or_set_invalidp) pref64Prefix *p = NULL; Network *network = ASSERT_PTR(userdata); usec_t usec; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); r = pref64_prefix_new_static(network, filename, section_line, &p); if (r < 0) return log_oom(); r = parse_sec(rvalue, &usec); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "PREF64 lifetime is invalid, ignoring assignment: %s", rvalue); return 0; } if (usec == USEC_INFINITY || DIV_ROUND_UP(usec, 8 * USEC_PER_SEC) >= UINT64_C(1) << 13) { log_syntax(unit, LOG_WARNING, filename, line, 0, "PREF64 lifetime is too long, ignoring assignment: %s", rvalue); return 0; } p->lifetime = usec; TAKE_PTR(p); return 0; } int config_parse_radv_dns( 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 *n = data; int r; assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { n->n_router_dns = 0; n->router_dns = mfree(n->router_dns); return 0; } for (const char *p = rvalue;;) { _cleanup_free_ char *w = NULL; union in_addr_union a; r = extract_first_word(&p, &w, NULL, 0); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to extract word, ignoring: %s", rvalue); return 0; } if (r == 0) return 0; if (streq(w, "_link_local")) a = IN_ADDR_NULL; else { r = in_addr_from_string(AF_INET6, w, &a); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse DNS server address, ignoring: %s", w); continue; } if (in_addr_is_null(AF_INET6, &a)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "DNS server address is null, ignoring: %s", w); continue; } } struct in6_addr *m; m = reallocarray(n->router_dns, n->n_router_dns + 1, sizeof(struct in6_addr)); if (!m) return log_oom(); m[n->n_router_dns++] = a.in6; n->router_dns = m; } } int config_parse_radv_search_domains( 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 *n = data; int r; assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { n->router_search_domains = ordered_set_free(n->router_search_domains); return 0; } for (const char *p = rvalue;;) { _cleanup_free_ char *w = NULL, *idna = NULL; r = extract_first_word(&p, &w, NULL, 0); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to extract word, ignoring: %s", rvalue); return 0; } if (r == 0) return 0; r = dns_name_apply_idna(w, &idna); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to apply IDNA to domain name '%s', ignoring: %m", w); continue; } else if (r == 0) /* transfer ownership to simplify subsequent operations */ idna = TAKE_PTR(w); r = ordered_set_ensure_allocated(&n->router_search_domains, &string_hash_ops_free); if (r < 0) return log_oom(); r = ordered_set_consume(n->router_search_domains, TAKE_PTR(idna)); if (r < 0) return log_oom(); } } static const char * const radv_prefix_delegation_table[_RADV_PREFIX_DELEGATION_MAX] = { [RADV_PREFIX_DELEGATION_NONE] = "no", [RADV_PREFIX_DELEGATION_STATIC] = "static", [RADV_PREFIX_DELEGATION_DHCP6] = "dhcpv6", [RADV_PREFIX_DELEGATION_BOTH] = "yes", }; DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN( radv_prefix_delegation, RADVPrefixDelegation, RADV_PREFIX_DELEGATION_BOTH); int config_parse_router_prefix_delegation( 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) { RADVPrefixDelegation val, *ra = ASSERT_PTR(data); int r; assert(filename); assert(lvalue); assert(rvalue); if (streq(lvalue, "IPv6SendRA")) { r = parse_boolean(rvalue); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid %s= setting, ignoring assignment: %s", lvalue, rvalue); return 0; } /* When IPv6SendRA= is enabled, only static prefixes are sent by default, and users * need to explicitly enable DHCPv6PrefixDelegation=. */ *ra = r ? RADV_PREFIX_DELEGATION_STATIC : RADV_PREFIX_DELEGATION_NONE; return 0; } /* For backward compatibility */ val = radv_prefix_delegation_from_string(rvalue); if (val < 0) { log_syntax(unit, LOG_WARNING, filename, line, val, "Invalid %s= setting, ignoring assignment: %s", lvalue, rvalue); return 0; } *ra = val; return 0; } int config_parse_router_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) { usec_t usec, *lifetime = ASSERT_PTR(data); int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { *lifetime = RADV_DEFAULT_ROUTER_LIFETIME_USEC; return 0; } r = parse_sec(rvalue, &usec); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse router lifetime, ignoring assignment: %s", rvalue); return 0; } if (usec > 0) { if (usec < RADV_MIN_ROUTER_LIFETIME_USEC) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Router lifetime %s is too short, using %s.", FORMAT_TIMESPAN(usec, USEC_PER_SEC), FORMAT_TIMESPAN(RADV_MIN_ROUTER_LIFETIME_USEC, USEC_PER_SEC)); usec = RADV_MIN_ROUTER_LIFETIME_USEC; } else if (usec > RADV_MAX_ROUTER_LIFETIME_USEC) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Router lifetime %s is too large, using %s.", FORMAT_TIMESPAN(usec, USEC_PER_SEC), FORMAT_TIMESPAN(RADV_MAX_ROUTER_LIFETIME_USEC, USEC_PER_SEC)); usec = RADV_MAX_ROUTER_LIFETIME_USEC; } } *lifetime = usec; return 0; } int config_parse_router_retransmit( 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) { usec_t usec, *router_retransmit_usec = ASSERT_PTR(data); int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { *router_retransmit_usec = 0; return 0; } r = parse_sec(rvalue, &usec); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue); return 0; } if (usec != USEC_INFINITY && usec > RADV_MAX_RETRANSMIT_USEC) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid [%s] %s=, ignoring assignment: %s", section, lvalue, rvalue); return 0; } *router_retransmit_usec = usec; return 0; } int config_parse_router_preference( 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; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); if (streq(rvalue, "high")) network->router_preference = SD_NDISC_PREFERENCE_HIGH; else if (STR_IN_SET(rvalue, "medium", "normal", "default")) network->router_preference = SD_NDISC_PREFERENCE_MEDIUM; else if (streq(rvalue, "low")) network->router_preference = SD_NDISC_PREFERENCE_LOW; else log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid router preference, ignoring assignment: %s", rvalue); return 0; } int config_parse_router_home_agent_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) { usec_t usec, *home_agent_lifetime_usec = ASSERT_PTR(data); int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { *home_agent_lifetime_usec = 0; return 0; } r = parse_sec(rvalue, &usec); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue); return 0; } if (!timestamp_is_set(usec) || usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid [%s] %s=, ignoring assignment: %s", section, lvalue, rvalue); return 0; } *home_agent_lifetime_usec = usec; return 0; }