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dhcp: Add DHCP protocol structures and initial defines

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Create a new directory to host DHCP components.
This commit is contained in:
Patrik Flykt 2013-12-09 23:43:07 +02:00 committed by Zbigniew Jędrzejewski-Szmek
parent e5ca092c27
commit 5f404b1e68
1 changed files with 104 additions and 0 deletions
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src/dhcp/protocol.h Normal file
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/*-*- 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>
#include "macro.h"
#include "sparse-endian.h"
struct DHCPMessage {
uint8_t op;
uint8_t htype;
uint8_t hlen;
uint8_t hops;
be32_t xid;
be16_t secs;
be16_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];
} _packed_;
typedef struct DHCPMessage DHCPMessage;
struct DHCPPacket {
struct iphdr ip;
struct udphdr udp;
DHCPMessage dhcp;
} _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;
enum {
BOOTREQUEST = 1,
BOOTREPLY = 2,
};
enum {
DHCP_DISCOVER = 1,
DHCP_OFFER = 2,
DHCP_REQUEST = 3,
DHCP_DECLINE = 4,
DHCP_ACK = 5,
DHCP_NAK = 6,
DHCP_RELEASE = 7,
};
enum {
DHCP_OVERLOAD_FILE = 1,
DHCP_OVERLOAD_SNAME = 2,
};
enum {
DHCP_OPTION_PAD = 0,
DHCP_OPTION_SUBNET_MASK = 1,
DHCP_OPTION_ROUTER = 3,
DHCP_OPTION_DOMAIN_NAME_SERVER = 6,
DHCP_OPTION_HOST_NAME = 12,
DHCP_OPTION_DOMAIN_NAME = 15,
DHCP_OPTION_NTP_SERVER = 42,
DHCP_OPTION_REQUESTED_IP_ADDRESS = 50,
DHCP_OPTION_OVERLOAD = 52,
DHCP_OPTION_MESSAGE_TYPE = 53,
DHCP_OPTION_PARAMETER_REQUEST_LIST = 55,
DHCP_OPTION_END = 255,
};