使用win7的承载网络开启共享wifi，ICS分配IP地址比较慢，自己重新写了一个简单的DHCP协议，IP地址可以从2分配到254.可以用winshark来抓包，分析DHCP协议。
mydhcp.cpp
#include "pch.h"
#include "mydhcp.h"
#include
#include
#include
#include "windows.h"
#include "Wbemcli.h"
#include
mydhcp.h:
#pragma once
enum PORTS {
BOOTPS = 67,
BOOTPC = 68
};
enum OP_TYPES {
BOOTREQUEST = 1,
BOOTREPLY = 2
};
enum HARDWARE_ADDRESS_TYPES {
ETHERNET = 0x01,
ETHERNET_LEN = 0x06
};
enum DHCP_MESSAGE_TYPE {
DHCP_DISCOVER = 1,
DHCP_OFFER = 2,
DHCP_REQUEST = 3,
DHCP_DECLINE = 4,
DHCP_ACK = 5,
DHCP_NAK = 6,
DHCP_RELEASE = 7,
DHCP_INFORM = 8
};
enum {
/* RFC 1497 Vendor Extensions */
PAD = 0,
END = 255,
SUBNET_MASK = 1,
TIME_OFFSET = 2,
ROUTER = 3,
TIME_SERVER = 4,
NAME_SERVER = 5,
DOMAIN_NAME_SERVER = 6,
LOG_SERVER = 7,
COOKIE_SERVER = 8,
LPR_SERVER = 9,
IMPRESS_SERVER = 10,
RESOURCE_LOCATION_SERVER = 11,
HOST_NAME = 12,
BOOT_FILE_SIZE = 13,
MERIT_DUMP_FILE = 14,
DOMAIN_NAME = 15,
SWAP_SERVER = 16,
ROOT_PATH = 17,
EXTENSIONS_PATH = 18,
/* IP Layer Parameters per Host */
IP_FORWARDING = 19,
NON_LOCAL_SOURCE_ROUTING = 20,
POLICY_FILTER = 21,
MAXIMUM_DATAGRAM_REASSEMBLY_SIZE = 22,
DEFAULT_IP_TIME_TO_LIVE = 23,
PATH_MTU_AGING_TIMEOUT = 24,
PATH_MTU_PLATEAU_TABLE = 25,
/* IP Layer Parameters per Interface */
INTERFACE_MTU = 26,
ALL_SUBNETS_ARE_LOCAL = 27,
BROADCAST_ADDRESS = 28,
PERFORM_MASK_DISCOVERY = 29,
MASK_SUPPLIER = 30,
PERFORM_ROUTER_DISCOVERY = 31,
ROUTER_SOLICITATION_ADDRESS = 32,
STATIC_ROUTE = 33,
/* Link Layer Parameters per Interface */
TRAILER_ENCAPSULATION = 34,
ARP_CACHE_TIMEOUT = 35,
ETHERNET_ENCAPSULATION = 36,
/* TCP Parameters */
TCP_DEFAULT_TTL = 37,
TCP_KEEPALIVE_INTERVAL = 38,
TCP_KEEPALIVE_GARBAGE = 39,
/* Application and Service Parameters */
NETWORK_INFORMATION_SERVICE_DOMAIN = 40,
NETWORK_INFORMATION_SERVERS = 41,
NETWORK_TIME_PROTOCOL_SERVERS = 42,
VENDOR_SPECIFIC_INFORMATION = 43,
NETBIOS_OVER_TCP_IP_NAME_SERVER = 44,
NETBIOS_OVER_TCP_IP_DATAGRAM_DISTRIBUTION_SERVER = 4,
NETBIOS_OVER_TCP_IP_NODE_TYPE = 46,
NETBIOS_OVER_TCP_IP_SCOPE = 47,
X_WINDOW_SYSTEM_FONT_SERVER = 48,
X_WINDOW_SYSTEM_DISPLAY_MANAGER = 49,
NETWORK_INFORMATION_SERVICE_PLUS_DOMAIN = 64,
NETWORK_INFORMATION_SERVICE_PLUS_SERVERS = 65,
MOBILE_IP_HOME_AGENT = 68,
SMTP_SERVER = 69,
POP3_SERVER = 70,
NNTP_SERVER = 71,
DEFAULT_WWW_SERVER = 72,
DEFAULT_FINGER_SERVER = 73,
DEFAULT_IRC_SERVER = 74,
STREETTALK_SERVER = 75,
STREETTALK_DIRECTORY_ASSISTANCE_SERVER = 76,
/* DHCP Extensions */
REQUESTED_IP_ADDRESS = 50,
IP_ADDRESS_LEASE_TIME = 51,
OPTION_OVERLOAD = 52,
TFTP_SERVER_NAME = 66,
BOOTFILE_NAME = 67,
DHCP_MESSAGE_TYPE = 53,
SERVER_IDENTIFIER = 54,
PARAMETER_REQUEST_LIST = 55,
MESSAGE = 56,
MAXIMUM_DHCP_MESSAGE_SIZE = 57,
RENEWAL_T1_TIME_VALUE = 58,
REBINDING_T2_TIME_VALUE = 59,
VENDOR_CLASS_IDENTIFIER = 60,
CLIENT_IDENTIFIER = 61
};
enum {
DHCP_HEADER_SIZE = 240
};
struct dhcp_message {
UINT8 MessageType;
UINT8 HardwareType;
UINT8 HardwareAddressLength;
UINT8 Hops;
UINT32 TransactionID;
UINT16 SecondsElapsed;
UINT16 BootpFlags;
UINT32 ClientIPAdress;
UINT8 YourClientIPAdress[4];
UINT32 NextServerIPAddress;
UINT32 RelayAgentIPAddress;
UINT8 ClienthardwareAddress[16];
UINT8 ServerHostName[64];
UINT8 BootFileName[128];
UINT8 MagicCookie[4];
UINT8 Options[312];
};
typedef struct dhcp_message DHCP_MESSAGE;
struct dhcp_options {
UINT8 id;
UINT8 len;
UINT8 data[256];
};
typedef struct dhcp_options DHCP_OPTIONS;
extern HANDLE g_hDispatcher;
extern SOCKET g_ServerSocket;
class mydhcp
{
public:
mydhcp::mydhcp();
mydhcp::~mydhcp();
int mydhcp::StartmyDHCPServer(void);
};
