tcpdmain.c

DOS下的TCP/IP源代码,可以做参考.

#include <stdio.h>
#include <string.h>
#include <conio.h>
#include <ctype.h>
#include <dos.h>
#include "tcplib.h"

//================================================
extern char tcpdebug;
extern long int tcptime;
TCPSocket tcphl;
//================================================

void ServeTcp(void)
{int len;
 char buf[512],buf1[512];

 while (tcp_kernal(tcphl))
   {len=0;
    if (peer_tcp_data(tcphl))
      {len=read_tcp(tcphl,buf,500);
       buf[len]=0;
       printf("\n%s",buf);
      }
    if (len>0)
     {strcpy(buf1,"TCP Server for DOS");
      write_tcp(tcphl,buf1,strlen(buf1),10);
      close_tcp_socket(tcphl);
      return;
     }
  }
 return;
}

//=============================================================
void starttcp(void)
{printf("\nTCP Server for DOS  --  He Lingsong, 1/3/2001\n");
 tcphl=new_socket();
 listen_tcp(tcphl,21);
}

void releasetcp(void)
{if (tcphl!=NULL) {close_tcp_socket(tcphl);}
 delay(100);
 if (tcphl!=NULL) release_socket(tcphl);
}

int checktcp(void)
{if (!tcp_kernal(tcphl))             //create Listen
   {listen_tcp(tcphl,21);return 0;}
 if (open_success_tcp(tcphl)) return 1;
 return 0;
}

//========================================================
int main(void)
{int rc;
 init_tcplib();
 starttcp();

 while (1)
  {if (kbhit())
    if (getch() == 27)
      {releasetcp();
       return 0;
      }
   rc=checktcp();                //Monitoring FTP user login
   if (rc==1) ServeTcp();
  }
}