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最新评论
1. re: 闭门造车就是在毁灭自己
8年, 有什么理由能让你如此眷恋呢?
--CPL
2. re: 闭门造车就是在毁灭自己
我们公司和你的情况几乎一样,就是绝不拖欠工资。
工作了8年,我的技术已经荒芜了。
--sLy
一段国外的PING程序(C#)
引自 http:
//
www.xayesky.com/dev/2008/0525/article_8537.html
//
**************************************
//
//
Name: Ping .net Class!
//
Description:Ping a machine from .NET.
//
This code is CLR compliant.
//
By: Carl Mercier
//
//
Assumes:The code is a complete consol
//
e application which can easilly modified
//
to become Windows Form.
//
//
This code is copyrighted and has
//
limited warranties.Please see http:
//
//
www.Planet-Source-Code.com/xq/ASP/txtCod
//
eId.335/lngWId.10/qx/VB/scripts/ShowCode
//
.htm
//
for details.
//
**************************************
//
using
System;
namespace
myping
{
/**/
///
<summary>
///
Summary description for Class1.
///
</summary>
class
myping
{
/**/
///
<summary>
///
The main entry point for the applica
//
tion.
/**/
///
</summary>
//
Declare some Constant Variables
const
int
SOCKET_ERROR
=
-
1
;
const
int
ICMP_ECHO
=
8
;
[STAThread]
static
void
Main(
string
[] args)
{
//
//
TODO: Add code to start application h
//
ere
//
if
(args.Length
==
0
)
{
//
If user did not enter any Parameter in
//
form him
Console.WriteLine(
"
Usage:myping <hostname> /r
"
) ;
Console.WriteLine(
"
<hostname> The name of the Host who you want to ping
"
);
Console.WriteLine(
"
/r Optional Switch to Ping the host continuously
"
) ;
}
else
if
(args.Length
==
1
)
{
//
Just the hostname provided by the user
//
//
call the method "PingHost" and pass th
//
e HostName as a parameter
PingHost(args[
0
]) ;
}
else
if
(args.Length
==
2
)
{
//
the user provided the hostname and the
//
switch
if
(args[
1
]
==
"
/r
"
)
{
//
loop the ping program
while
(
true
)
{
//
call the method "PingHost" and pass th
//
e HostName as a parameter
PingHost(args[
0
]) ;
}
}
else
{
//
if the user provided some other switch
//
PingHost(args[
0
]) ;
}
}
else
{
//
Some error occured
Console.WriteLine(
"
Error in Arguments
"
) ;
}
}
public
static
void
PingHost(
string
host)
{
//
Declare the IPHostEntry
System.Net.IPHostEntry serverHE, fromHE;
int
nBytes
=
0
;
int
dwStart
=
0
, dwStop
=
0
;
//
Initilize a Socket of the Type ICMP
System.Net.Sockets.Socket socket
=
new
System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork,
System.Net.Sockets.SocketType.Raw, System.Net.Sockets.ProtocolType.Icmp);
//
Get the server endpoint
try
{
serverHE
=
System.Net.Dns.GetHostByName(host);
}
catch
(Exception)
{
Console.WriteLine(
"
Host not found
"
);
//
fail
return
;
}
//
Convert the server IP_EndPoint to an
//
EndPoint
System.Net.IPEndPoint ipepServer
=
new
System.Net.IPEndPoint(serverHE.AddressList[
0
],
0
);
System.Net.EndPoint epServer
=
(ipepServer);
//
Set the receiving endpoint to the cli
//
ent machine
fromHE
=
System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName());
System.Net.IPEndPoint ipEndPointFrom
=
new
System.Net.IPEndPoint(fromHE.AddressList[
0
],
0
);
System.Net.EndPoint EndPointFrom
=
(ipEndPointFrom);
int
PacketSize
=
0
;
IcmpPacket packet
=
new
IcmpPacket();
//
Construct the packet to send
packet.Type
=
ICMP_ECHO;
//
8
packet.SubCode
=
0
;
packet.CheckSum
=
UInt16.Parse(
"
0
"
);
packet.Identifier
=
UInt16.Parse(
"
45
"
);
packet.SequenceNumber
=
UInt16.Parse(
"
0
"
);
int
PingData
=
32
;
//
sizeof(IcmpPacket) - 8;
packet.Data
=
new
Byte[PingData];
//
Initilize the Packet.Data
for
(
int
i
=
0
; i
<
PingData; i
++
)
{
packet.Data[i]
=
(
byte
)
'
#
'
;
}
//
Variable to hold the total Packet size
//
PacketSize
=
PingData
+
8
;
Byte [] icmp_pkt_buffer
=
new
Byte[ PacketSize ];
Int32 Index
=
0
;
//
Call a Methos Serialize which counts
//
The total number of Bytes in the Packe
//
t
Index
=
Serialize(
packet,
icmp_pkt_buffer,
PacketSize,
PingData );
//
Error in Packet Size
if
( Index
==
-
1
)
{
Console.WriteLine(
"
Error in Making Packet
"
);
return
;
}
//
now get this critter into a UInt16 ar
//
ray
//
Get the Half size of the Packet
Double double_length
=
Convert.ToDouble(Index);
Double dtemp
=
System.Math.Ceiling( double_length
/
2
);
int
cksum_buffer_length
=
Convert.ToInt32(dtemp);
//
Create a Byte Array
UInt16 [] cksum_buffer
=
new
UInt16[cksum_buffer_length];
//
Code to initilize the Uint16 array
int
icmp_header_buffer_index
=
0
;
for
(
int
i
=
0
; i
<
cksum_buffer_length; i
++
)
{
cksum_buffer[i]
=
BitConverter.ToUInt16(icmp_pkt_buffer,icmp_header_buffer_index);
icmp_header_buffer_index
+=
2
;
}
//
Call a method which will return a chec
//
ksum
UInt16 u_cksum
=
checksum(cksum_buffer, cksum_buffer_length);
//
Save the checksum to the Packet
packet.CheckSum
=
u_cksum;
//
Now that we have the checksum, serial
//
ize the packet again
Byte [] sendbuf
=
new
Byte[ PacketSize ];
//
again check the packet size
Index
=
Serialize(
packet,
sendbuf,
PacketSize,
PingData );
//
if there is a error report it
if
( Index
==
-
1
)
{
Console.WriteLine(
"
Error in Making Packet
"
);
return
;
}
dwStart
=
System.Environment.TickCount;
//
Start timing
//
send the Pack over the socket
if
((nBytes
=
socket.SendTo(sendbuf, PacketSize,
0
, epServer))
==
SOCKET_ERROR)
{
Console.WriteLine(
"
Socket Error cannot Send Packet
"
);
}
//
Initialize the buffers. The receive b
//
uffer is the size of the
//
ICMP header plus the IP header (20 by
//
tes)
Byte [] ReceiveBuffer
=
new
Byte[
256
];
nBytes
=
0
;
//
Receive the bytes
bool
recd
=
false
;
int
timeout
=
0
;
//
loop for checking the time of the serv
//
er responding
while
(
!
recd)
{
nBytes
=
socket.ReceiveFrom(ReceiveBuffer,
256
,
0
,
ref
EndPointFrom);
if
(nBytes
==
SOCKET_ERROR)
{
Console.WriteLine(
"
Host not Responding
"
) ;
recd
=
true
;
break
;
}
else
if
(nBytes
>
0
)
{
dwStop
=
System.Environment.TickCount
-
dwStart;
//
stop timing
Console.WriteLine(
"
Reply from
"
+
epServer.ToString()
+
"
in
"
+
dwStop
+
"
ms => Bytes Received:
"
+
nBytes);
recd
=
true
;
break
;
}
timeout
=
System.Environment.TickCount
-
dwStart;
if
(timeout
>
1000
)
{
Console.WriteLine(
"
Time Out
"
) ;
recd
=
true
;
}
}
//
close the socket
socket.Close();
}
public
static
Int32 Serialize( IcmpPacket packet, Byte [] Buffer, Int32 PacketSize, Int32 PingData )
{
Int32 cbReturn
=
0
;
//
serialize the struct into the array
int
Index
=
0
;
Byte [] b_type
=
new
Byte[
1
];
b_type[
0
]
=
(packet.Type);
Byte [] b_code
=
new
Byte[
1
];
b_code[
0
]
=
(packet.SubCode);
Byte [] b_cksum
=
BitConverter.GetBytes(packet.CheckSum);
Byte [] b_id
=
BitConverter.GetBytes(packet.Identifier);
Byte [] b_seq
=
BitConverter.GetBytes(packet.SequenceNumber);
//
Console.WriteLine("Serialize type ");
//
Array.Copy( b_type,
0
, Buffer, Index, b_type.Length );
Index
+=
b_type.Length;
//
Console.WriteLine("Serialize code ");
//
Array.Copy( b_code,
0
, Buffer, Index, b_code.Length );
Index
+=
b_code.Length;
//
Console.WriteLine("Serialize cksum ")
//
;
Array.Copy( b_cksum,
0
, Buffer, Index, b_cksum.Length );
Index
+=
b_cksum.Length;
//
Console.WriteLine("Serialize id ");
Array.Copy( b_id,
0
, Buffer, Index, b_id.Length );
Index
+=
b_id.Length;
Array.Copy( b_seq,
0
, Buffer, Index, b_seq.Length );
Index
+=
b_seq.Length;
//
copy the data
Array.Copy( packet.Data,
0
, Buffer, Index, PingData );
Index
+=
PingData;
if
( Index
!=
PacketSize
/**/
/*
sizeof(IcmpPacket)
*/
)
{
cbReturn
=
-
1
;
return
cbReturn;
}
cbReturn
=
Index;
return
cbReturn;
}
public
static
UInt16 checksum( UInt16[] buffer,
int
size )
{
Int32 cksum
=
0
;
int
counter;
counter
=
0
;
while
( size
>
0
)
{
UInt16 val
=
buffer[counter];
cksum
+=
Convert.ToInt32( buffer[counter] );
counter
+=
1
;
size
-=
1
;
}
cksum
=
(cksum
>>
16
)
+
(cksum
&
0xffff
);
cksum
+=
(cksum
>>
16
);
return
(UInt16)(
~
cksum);
}
}
public
class
IcmpPacket
{
public
Byte Type;
//
type of message
public
Byte SubCode;
//
type of sub code
public
UInt16 CheckSum;
//
ones complement checksum of struct
public
UInt16 Identifier;
//
identifier
public
UInt16 SequenceNumber;
//
sequence number
public
Byte [] Data;
}
}
posted on 2008-09-01 22:18
皮皮陈
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