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-rw-r--r--src/libsystemd-network/dhcp-duid-internal.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/src/libsystemd-network/dhcp-duid-internal.h b/src/libsystemd-network/dhcp-duid-internal.h
new file mode 100644
index 0000000..f8bc15c
--- /dev/null
+++ b/src/libsystemd-network/dhcp-duid-internal.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-device.h"
+#include "sd-dhcp-duid.h"
+#include "sd-id128.h"
+
+#include "ether-addr-util.h"
+#include "macro.h"
+#include "sparse-endian.h"
+
+#define SYSTEMD_PEN 43793
+
+typedef enum DUIDType {
+ DUID_TYPE_LLT = SD_DUID_TYPE_LLT,
+ DUID_TYPE_EN = SD_DUID_TYPE_EN,
+ DUID_TYPE_LL = SD_DUID_TYPE_LL,
+ DUID_TYPE_UUID = SD_DUID_TYPE_UUID,
+ _DUID_TYPE_MAX,
+ _DUID_TYPE_INVALID = -EINVAL,
+} DUIDType;
+
+/* RFC 8415 section 11.1:
+ * A DUID consists of a 2-octet type code represented in network byte order, followed by a variable number of
+ * octets that make up the actual identifier. The length of the DUID (not including the type code) is at
+ * least 1 octet and at most 128 octets. */
+#define MIN_DUID_DATA_LEN 1
+#define MAX_DUID_DATA_LEN 128
+#define MIN_DUID_LEN (sizeof(be16_t) + MIN_DUID_DATA_LEN)
+#define MAX_DUID_LEN (sizeof(be16_t) + MAX_DUID_DATA_LEN)
+
+/* 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[];
+ } _packed_ llt;
+ struct {
+ /* DUID_TYPE_EN */
+ be32_t pen;
+ uint8_t id[];
+ } _packed_ en;
+ struct {
+ /* DUID_TYPE_LL */
+ be16_t htype;
+ uint8_t haddr[];
+ } _packed_ ll;
+ struct {
+ /* DUID_TYPE_UUID */
+ sd_id128_t uuid;
+ } _packed_ uuid;
+ uint8_t data[MAX_DUID_DATA_LEN];
+ };
+} _packed_;
+
+typedef struct sd_dhcp_duid {
+ size_t size;
+ union {
+ struct duid duid;
+ uint8_t raw[MAX_DUID_LEN];
+ };
+} sd_dhcp_duid;
+
+static inline bool duid_size_is_valid(size_t size) {
+ return size >= MIN_DUID_LEN && size <= MAX_DUID_LEN;
+}
+
+static inline bool duid_data_size_is_valid(size_t size) {
+ return size >= MIN_DUID_DATA_LEN && size <= MAX_DUID_DATA_LEN;
+}
+
+const char *duid_type_to_string(DUIDType t) _const_;
+int dhcp_duid_to_string_internal(uint16_t type, const void *data, size_t data_size, char **ret);
+
+int dhcp_identifier_set_iaid(
+ sd_device *dev,
+ const struct hw_addr_data *hw_addr,
+ bool legacy_unstable_byteorder,
+ void *ret);