飛鴿傳書(ip messenger,簡為ipmsg)是一個小巧友善的即時通信軟體,它适合用于區域網路内甚至廣域網間進行實時通信和文檔共享。特别是在區域網路内傳送檔案/檔案夾的速度非常快!
ipmsg 是一款區域網路内即時通信軟體, 基于 tcp/ip(udp).
可運作于多種操作平台(win/mac/unix/java), 并實作跨平台資訊交流.
不需要伺服器支援.
支援檔案/檔案夾的傳送 (2.00版以上)
通訊資料采用 rsa/blofish 加密 (2.00版以上)
十分小巧, 簡單易用, 而且你可以完全免費使用它
目前已有的版本包括: win32, win16, macos, macosx, x11, gtk, gnome,java 等, 并且公開源代碼。
本文示範了如何使用java的net包,向ipmsg用戶端發送消息。
ipmsg command 常量定義如下:
1 /*========== constant value ==========*/
2 public static final long ipmsg_commask = 0x000000ff;
3 public static final long ipmsg_optmask = 0xffffff00;
4 public static final long ipmsg_nooperation = 0x00000000;
5 public static final long ipmsg_br_entry = 0x00000001;
6 public static final long ipmsg_br_exit = 0x00000002;
7 public static final long ipmsg_ansentry = 0x00000003;
8 public static final long ipmsg_br_absence = 0x00000004;
9
10
11
12 public static final long ipmsg_br_isgetlist = 0x00000018;
13 public static final long ipmsg_okgetlist = 0x00000015;
14 public static final long ipmsg_getlist = 0x00000016;
15 public static final long ipmsg_anslist = 0x00000017;
16
17 public static final long ipmsg_sendmsg = 0x00000020;
18 public static final long ipmsg_recvmsg = 0x00000021;
19
20 public static final long ipmsg_readmsg = 0x00000030;
21 public static final long ipmsg_delmsg = 0x00000031;
22
23 public static final long ipmsg_getinfo = 0x00000040;
24 public static final long ipmsg_sendinfo = 0x00000041;
25
26 // other opt
27 public static final long ipmsg_absenceopt = 0x00000100;
28 public static final long ipmsg_serveropt = 0x00000200;
29 public static final long ipmsg_dialupopt = 0x00010000;
30
31 // send opt
32 public static final long ipmsg_sendcheckopt = 0x00000100;
33 public static final long ipmsg_secretopt = 0x00000200;
34 public static final long ipmsg_broadcastopt = 0x00000400;
35 public static final long ipmsg_multicastopt = 0x00000800;
36 public static final long ipmsg_nopopupopt = 0x00001000;
37 public static final long ipmsg_autoretopt = 0x00002000;
38 public static final long ipmsg_retryopt = 0x00004000;
39 public static final long ipmsg_passwordopt = 0x00008000;
40 public static final long ipmsg_nologopt = 0x00020000;
41 public static final long ipmsg_newmutiopt = 0x00040000;
42
43 public static final int maxbuf = 8192;
44 /*========== end ==========*/
ipmsg收發資料包的格式(一行):
1 version(ipmsg版本):no(消息編号,可以用系統時間):user(發送消息的使用者名):host(發送消息的主機名):command(上述 command 常量,可以用 | 組合多個值):msg(消息内容)
示例(向ipmsg發送消息,需要先打開對方的ipmsg):
1 import java.io.ioexception;
2 import java.net.datagrampacket;
3 import java.net.datagramsocket;
4 import java.net.inetaddress;
5 import java.net.socketexception;
6 import java.net.unknownhostexception;
7 import java.util.date;
8
9 /**
10 * @author 亂 7 8 糟 http://www.fadesky.com
11 */
12 public class testipmsg
13 {
14 public static void main(string[] args)
15 {
16 datagramsocket socket;
17 inetaddress address;
18
19 long ipmsg_sendmsg = 0x00000020;
20
21 string sender = "亂 7 8 糟";
22 string host = "localhost";
23 string msg_content = "hello world!";
24
25 try
26 {
27 socket = new datagramsocket();
28 address = inetaddress.getbyname("192.168.1.20");// 發送給消息的位址
29
30 /**
31 * ipmsg收發資料包的格式(一行):
32 *
33 * version(ipmsg版本):no(消息編号,可以用系統時間):user(發送消息的使用者名):
34 * host(發送消息的主機名):command(上述 command 常量,可以用 | 組合多個值):
35 * msg(消息内容)
36 *
37 */
38 byte[] buffer = ("1:" + new date().gettime() + ":" + sender + ":" + host
39 + ":" + ipmsg_sendmsg + ":" + msg_content).getbytes();
40
41 datagrampacket packet = new datagrampacket(buffer, buffer.length,
42 address, 2425);
43 socket.send(packet); // 發送封包
44
45 packet = new datagrampacket(buffer, buffer.length);
46 socket.receive(packet);// 接收回應
47
48 string message = new string(packet.getdata()); // 得到封包資訊
49
50 system.out.println(message); // 顯示對方傳回的資訊
51 }
52 catch (unknownhostexception e)
53 {
54 e.printstacktrace();
55 }
56 catch (socketexception e)
57 {
58 e.printstacktrace();
59 }
60
61 catch (ioexception e)
62 {
63 e.printstacktrace();
64 }
65
66 }
67
68 }
69