network: dhcp - split out the duid structure into a new header file

[elogind.git] / src / libsystemd-network / dhcp-identifier.h

diff --git a/src/libsystemd-network/dhcp-identifier.h b/src/libsystemd-network/dhcp-identifier.h
new file mode 100644 (file)
index 0000000..af95f07
--- /dev/null
+++ b/src/libsystemd-network/dhcp-identifier.h
@@ -0,0 +1,61 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2015 Tom Gundersen <teg@jklmen>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/ethernet.h>
+
+#include "sparse-endian.h"
+#include "sd-id128.h"
+
+/* 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
+
+struct duid {
+        uint16_t type;
+        union {
+                struct {
+                        /* DHCP6_DUID_LLT */
+                        uint16_t htype;
+                        uint32_t time;
+                        uint8_t haddr[0];
+                } _packed_ llt;
+                struct {
+                        /* DHCP6_DUID_EN */
+                        uint32_t pen;
+                        uint8_t id[8];
+                } _packed_ en;
+                struct {
+                        /* DHCP6_DUID_LL */
+                        int16_t htype;
+                        uint8_t haddr[0];
+                } _packed_ ll;
+                struct {
+                        /* DHCP6_DUID_UUID */
+                        sd_id128_t uuid;
+                } _packed_ uuid;
+                struct {
+                        uint8_t data[MAX_DUID_LEN];
+                } _packed_ raw;
+        };
+} _packed_;