[systemd-devel] [PATCH 01/28] dhcp: Add DHCP protocol structures and initial defines

[Patrik Flykt]

Create a new directory to host DHCP components.
---
 src/dhcp/protocol.h |   93 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 src/dhcp/protocol.h

diff --git a/src/dhcp/protocol.h b/src/dhcp/protocol.h
new file mode 100644
index 0000000..3fc4baf
--- /dev/null
+++ b/src/dhcp/protocol.h
@@ -0,0 +1,93 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation. All rights reserved.
+
+  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 <netinet/udp.h>
+#include <netinet/ip.h>
+#include <stdint.h>
+
+struct DHCPMessage {
+        uint8_t op;
+        uint8_t htype;
+        uint8_t hlen;
+        uint8_t hops;
+        uint32_t xid;
+        uint16_t secs;
+        uint16_t flags;
+        uint32_t ciaddr;
+        uint32_t yiaddr;
+        uint32_t siaddr;
+        uint32_t giaddr;
+        uint8_t chaddr[16];
+        uint8_t sname[64];
+        uint8_t file[128];
+} __attribute__((packed));
+
+typedef struct DHCPMessage DHCPMessage;
+
+struct DHCPPacket {
+        struct iphdr ip;
+        struct udphdr udp;
+        DHCPMessage dhcp;
+} __attribute__((packed));
+
+typedef struct DHCPPacket DHCPPacket;
+
+enum DHCPState {
+        DHCP_STATE_INIT                         = 0,
+        DHCP_STATE_SELECTING                    = 1,
+        DHCP_STATE_INIT_REBOOT                  = 2,
+        DHCP_STATE_REBOOTING                    = 3,
+        DHCP_STATE_REQUESTING                   = 4,
+        DHCP_STATE_BOUND                        = 5,
+        DHCP_STATE_RENEWING                     = 6,
+        DHCP_STATE_REBINDING                    = 7,
+};
+
+typedef enum DHCPState DHCPState;
+
+#define BOOTREQUEST                             1
+#define BOOTREPLY                               2
+
+#define DHCP_DISCOVER                           1
+#define DHCP_OFFER                              2
+#define DHCP_REQUEST                            3
+#define DHCP_DECLINE                            4
+#define DHCP_ACK                                5
+#define DHCP_NAK                                6
+#define DHCP_RELEASE                            7
+
+#define DHCP_OVERLOAD_FILE                      1
+#define DHCP_OVERLOAD_SNAME                     2
+
+#define DHCP_OPTION_PAD                         0
+#define DHCP_OPTION_SUBNET_MASK                 1
+#define DHCP_OPTION_ROUTER                      3
+#define DHCP_OPTION_DOMAIN_NAME_SERVER          6
+#define DHCP_OPTION_HOST_NAME                   12
+#define DHCP_OPTION_DOMAIN_NAME                 15
+#define DHCP_OPTION_NTP_SERVER                  42
+#define DHCP_OPTION_REQUESTED_IP_ADDRESS        50
+#define DHCP_OPTION_OVERLOAD                    52
+#define DHCP_OPTION_MESSAGE_TYPE                53
+#define DHCP_OPTION_PARAMETER_REQUEST_LIST      55
+#define DHCP_OPTION_END                         255
-- 
1.7.10.4