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-rw-r--r--src/libsystemd-network/dhcp-identifier.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.h b/src/libsystemd-network/dhcp-identifier.h
new file mode 100644
index 0000000..8acb8c3
--- /dev/null
+++ b/src/libsystemd-network/dhcp-identifier.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-id128.h"
+
+#include "ether-addr-util.h"
+#include "macro.h"
+#include "sparse-endian.h"
+#include "time-util.h"
+#include "unaligned.h"
+
+#define SYSTEMD_PEN 43793
+
+typedef enum DUIDType {
+ DUID_TYPE_LLT = 1,
+ DUID_TYPE_EN = 2,
+ DUID_TYPE_LL = 3,
+ DUID_TYPE_UUID = 4,
+ _DUID_TYPE_MAX,
+ _DUID_TYPE_INVALID = -EINVAL,
+} DUIDType;
+
+/* RFC 3315 section 9.1:
+ * A DUID can be no more than 128 octets long (not including the type code).
+ */
+#define MAX_DUID_LEN 128
+
+/* https://tools.ietf.org/html/rfc3315#section-9.1 */
+struct duid {
+ be16_t type;
+ union {
+ struct {
+ /* DUID_TYPE_LLT */
+ be16_t htype;
+ be32_t time;
+ uint8_t haddr[0];
+ } _packed_ llt;
+ struct {
+ /* DUID_TYPE_EN */
+ be32_t pen;
+ uint8_t id[8];
+ } _packed_ en;
+ struct {
+ /* DUID_TYPE_LL */
+ be16_t htype;
+ uint8_t haddr[0];
+ } _packed_ ll;
+ struct {
+ /* DUID_TYPE_UUID */
+ sd_id128_t uuid;
+ } _packed_ uuid;
+ struct {
+ uint8_t data[MAX_DUID_LEN];
+ } _packed_ raw;
+ };
+} _packed_;
+
+int dhcp_validate_duid_len(DUIDType duid_type, size_t duid_len, bool strict);
+int dhcp_identifier_set_duid_en(bool test_mode, struct duid *ret_duid, size_t *ret_len);
+int dhcp_identifier_set_duid(
+ DUIDType duid_type,
+ const struct hw_addr_data *hw_addr,
+ uint16_t arp_type,
+ usec_t llt_time,
+ bool test_mode,
+ struct duid *ret_duid,
+ size_t *ret_len);
+int dhcp_identifier_set_iaid(
+ int ifindex,
+ const struct hw_addr_data *hw_addr,
+ bool legacy_unstable_byteorder,
+ bool use_mac,
+ void *ret);
+
+const char *duid_type_to_string(DUIDType t) _const_;