| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <net/if.h> |
| #include <linux/if_addrlabel.h> |
| |
| #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; |
| } |