用pascal写的最简单的winsock程序

类别:Delphi 点击:0 评论:0 推荐:

我把socket编程教程的第一个例子改写了一下
服务器接受客户信息,再反送回去

实际上是直接调用win api
在delphi4下用命令行编译
dcc32 -cc server1.pas
用windows自带的telnet测试

server1.pas:
program server1;

uses windows,winsock;

const myport=1414;//预定义口

{type
 sockaddr_in = record
  case Integer of
   0: (sin_family: u_short;
     sin_port: u_short;
     sin_addr: TInAddr;
     sin_zero: array[0..7] of Char);
   1: (sa_family: u_short;
     sa_data: array[0..13] of Char)
 end;
 TSockAddrIn = sockaddr_in;
 PSOCKADDR = ^TSockAddr;
 TSockAddr = sockaddr_in;

 WSAData = record // !!! also WSDATA
  wVersion: Word;
  wHighVersion: Word;
  szDescription: array[0..WSADESCRIPTION_LEN] of Char;
  szSystemStatus: array[0..WSASYS_STATUS_LEN] of Char;
  iMaxSockets: Word;
  iMaxUdpDg: Word;
  lpVendorInfo: PChar;
 end;
 TWSAData = WSAData;

end
}

var str:string;
  s,ns:TSocket;//type:u_int|integer;
  ver:word;
  rece:TWSAData;//type:WSAData;
  wsstatus:integer;//winsocket_status;
  i,pktlen:integer;
  szd:array[0..WSADESCRIPTION_LEN] of Char;
  szs:array[0..WSASYS_STATUS_LEN] of Char;
  server:TSockAddr;//tpye:sockaddr_in
  client:PSockAddr;//type:^sockaddr_in
  namelen:PInteger;//type:^Integer;
  buf:array[0..1023] of char;

begin
ver:=514;
write('WSAStartup = ');
try
wsstatus:=WSAStartup(ver,rece);
//初始化winsock;在windows下是必须的过程
writeln(wsstatus);//winsock状态,0代表成功
if wsstatus=0 then
begin
writeln;
writeln('********************************************************************************');
//以下显示winsock状态
write('wVersion = ');
writeln(rece.wVersion);
write('wHighVersion = ');
writeln(rece.wHighVersion);
write('iMaxSockets = ');
writeln(rece.iMaxSockets);
write('iMaxUdpDg = ');
writeln(rece.iMaxUdpDg);
writeln('szDescription is ');
for i:=0 to WSADESCRIPTION_LEN do write(szd[i]);
writeln;
writeln('szSystemStatus is ');
for i:=0 to WSASYS_STATUS_LEN do write(szs[i]);
writeln;
writeln('********************************************************************************');
end;

write('socket = ');
s:=socket(AF_INET,SOCK_STREAM,0);
//第一步,建立服务器的socket,0表示成功
writeln(s);
if s

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