/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include "alloc-util.h" #include "netlink-util.h" #include "networkd-address-label.h" #include "networkd-link.h" #include "networkd-manager.h" #include "networkd-network.h" #include "networkd-queue.h" #include "parse-util.h" AddressLabel *address_label_free(AddressLabel *label) { if (!label) return NULL; if (label->network) { assert(label->section); hashmap_remove(label->network->address_labels_by_section, label->section); } config_section_free(label->section); return mfree(label); } DEFINE_SECTION_CLEANUP_FUNCTIONS(AddressLabel, address_label_free); static int address_label_new_static(Network *network, const char *filename, unsigned section_line, AddressLabel **ret) { _cleanup_(config_section_freep) ConfigSection *n = NULL; _cleanup_(address_label_freep) AddressLabel *label = 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; label = hashmap_get(network->address_labels_by_section, n); if (label) { *ret = TAKE_PTR(label); return 0; } label = new(AddressLabel, 1); if (!label) return -ENOMEM; *label = (AddressLabel) { .network = network, .section = TAKE_PTR(n), .label = UINT32_MAX, }; r = hashmap_ensure_put(&network->address_labels_by_section, &config_section_hash_ops, label->section, label); if (r < 0) return r; *ret = TAKE_PTR(label); return 0; } static int address_label_configure_handler( sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { int r; assert(m); assert(link); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_message_warning_errno(link, m, r, "Could not set address label"); link_enter_failed(link); return 1; } if (link->static_address_label_messages == 0) { log_link_debug(link, "Addresses label set"); link->static_address_labels_configured = true; link_check_ready(link); } return 1; } static int address_label_configure(AddressLabel *label, Link *link, Request *req) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; int r; assert(label); assert(link); assert(link->ifindex > 0); assert(link->manager); assert(link->manager->rtnl); assert(req); r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &m, RTM_NEWADDRLABEL, link->ifindex, AF_INET6); if (r < 0) return r; r = sd_rtnl_message_addrlabel_set_prefixlen(m, label->prefixlen); if (r < 0) return r; r = sd_netlink_message_append_u32(m, IFAL_LABEL, label->label); if (r < 0) return r; r = sd_netlink_message_append_in6_addr(m, IFA_ADDRESS, &label->prefix); if (r < 0) return r; return request_call_netlink_async(link->manager->rtnl, m, req); } static int address_label_process_request(Request *req, Link *link, void *userdata) { AddressLabel *label = ASSERT_PTR(userdata); int r; assert(req); assert(link); if (!link_is_ready_to_configure(link, false)) return 0; r = address_label_configure(label, link, req); if (r < 0) return log_link_warning_errno(link, r, "Failed to configure address label: %m"); return 1; } int link_request_static_address_labels(Link *link) { AddressLabel *label; int r; assert(link); assert(link->network); link->static_address_labels_configured = false; HASHMAP_FOREACH(label, link->network->address_labels_by_section) { r = link_queue_request_full(link, REQUEST_TYPE_ADDRESS_LABEL, label, NULL, trivial_hash_func, trivial_compare_func, address_label_process_request, &link->static_address_label_messages, address_label_configure_handler, NULL); if (r < 0) return log_link_warning_errno(link, r, "Failed to request address label: %m"); } if (link->static_address_label_messages == 0) { link->static_address_labels_configured = true; link_check_ready(link); } else { log_link_debug(link, "Setting address labels."); link_set_state(link, LINK_STATE_CONFIGURING); } return 0; } static int address_label_section_verify(AddressLabel *label) { assert(label); assert(label->section); if (section_is_invalid(label->section)) return -EINVAL; if (!label->prefix_set) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: [IPv6AddressLabel] section without Prefix= setting specified. " "Ignoring [IPv6AddressLabel] section from line %u.", label->section->filename, label->section->line); if (label->label == UINT32_MAX) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "%s: [IPv6AddressLabel] section without Label= setting specified. " "Ignoring [IPv6AddressLabel] section from line %u.", label->section->filename, label->section->line); return 0; } void network_drop_invalid_address_labels(Network *network) { AddressLabel *label; assert(network); HASHMAP_FOREACH(label, network->address_labels_by_section) if (address_label_section_verify(label) < 0) address_label_free(label); } int config_parse_address_label_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_(address_label_free_or_set_invalidp) AddressLabel *n = NULL; Network *network = userdata; unsigned char prefixlen; union in_addr_union a; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_label_new_static(network, filename, section_line, &n); 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, "Invalid prefix for address label, ignoring assignment: %s", rvalue); return 0; } if (in6_addr_is_ipv4_mapped_address(&a.in6) && prefixlen > 96) { /* See ip6addrlbl_alloc() in net/ipv6/addrlabel.c of kernel. */ log_syntax(unit, LOG_WARNING, filename, line, 0, "The prefix length of IPv4 mapped address for address label must be equal to or smaller than 96, " "ignoring assignment: %s", rvalue); return 0; } n->prefix = a.in6; n->prefixlen = prefixlen; n->prefix_set = true; TAKE_PTR(n); return 0; } int config_parse_address_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_label_free_or_set_invalidp) AddressLabel *n = NULL; Network *network = userdata; uint32_t k; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = address_label_new_static(network, filename, section_line, &n); if (r < 0) return log_oom(); r = safe_atou32(rvalue, &k); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue); return 0; } if (k == UINT_MAX) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Address label is invalid, ignoring: %s", rvalue); return 0; } n->label = k; TAKE_PTR(n); return 0; }