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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
commit55944e5e40b1be2afc4855d8d2baf4b73d1876b5 (patch)
tree33f869f55a1b149e9b7c2b7e201867ca5dd52992 /src/network/networkd-address-label.c
parentInitial commit. (diff)
downloadsystemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.tar.xz
systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.zip
Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/network/networkd-address-label.c')
-rw-r--r--src/network/networkd-address-label.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/src/network/networkd-address-label.c b/src/network/networkd-address-label.c
new file mode 100644
index 0000000..745b959
--- /dev/null
+++ b/src/network/networkd-address-label.c
@@ -0,0 +1,298 @@
+/* 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;
+}