/* gcc chat-client-win.c -o chat-client-win.exe -lpthread -lwsock32 -trigraphs */

/* MinGW32 for windows */

#include <stdio.h>

#include <stdlib.h>

#include <winsock.h>

#include <malloc.h>

#include <windows.h>

#include <string.h>

#include <time.h>

#include <io.h>

#include <errno.h>

#include <conio.h>

#pragma comment(lib,"ws2_32.lib")

int main()

{

WSADATA wsaData; /* windows socket stuff */

struct sockaddr_in serv_addr; /* socket stuff */

int retn0=0,retn1=0,sockfd0=0,retn2=0,retn3=0,nick_length=0,nick_lb=0; /* nick_lb is nick length backup */

extern int errno; /* errno */

char* sock_recv=NULL;

char* keyboard=NULL;

char nick[20]="0";

fd_set fdset0; /* select() stuff */

struct timeval timeout; /* select() stuff */

WSAStartup(MAKEWORD(2,2),&wsaData); /* windows socket init.. */

sockfd0=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

serv_addr.sin_family=AF_INET;

serv_addr.sin_addr.s_addr=inet_addr("192.241.231.248");

serv_addr.sin_port=htons(30802);

system("color 30"); /* call DOS API */

system("title Client");

system("cls");

printf("Welcome to client??/n");

sock_recv=(char *)malloc(10000);

keyboard=(char *)malloc(10000);

memset(keyboard,0,10000);

memset(sock_recv,0,10000);

write(1,"input your name:",16);

nick_length=read(0,nick,20); /* read() can read line feed */

/* printf("%d",nick_length); */

nick_lb = nick_length;

if (nick_length > 20) {

write(1,"too long nick..",15);

goto exit;

}

nick[nick_length-1]=':';

for (;nick_length>0;) {

* (keyboard + nick_length-1) = nick[nick_length-1];

--nick_length;

}

connect(sockfd0,(struct sockaddr*)&serv_addr,sizeof(serv_addr));

for (;;) {

FD_ZERO(&fdset0);

FD_SET(sockfd0,&fdset0); /* set monitor fd for select() */

timeout.tv_sec=1;

timeout.tv_usec=0; /* set timeout for select() */

retn3=select(sockfd0+1,&fdset0,NULL,NULL,&timeout);

if (retn3<0) {perror("select");printf("%d??/n",errno);break;}

if (FD_ISSET(sockfd0,&fdset0)) {

memset(sock_recv,0,10000);

retn1=recv(sockfd0,sock_recv,10000,0); /* retn1=read(sockfd0,sock_recv,10000); */

if (retn1==-1) {perror("recv");printf("%d??/n",errno); break;}

printf("%s",sock_recv);

}

if (kbhit()) { /* linux's select(0+1,&fdset,NULL,NULL,&timeout);can monitor stdin,but ??/

win's select() can't monitor fd,only monitor socket,so use kbhit() monitor keyboard input */

memset(keyboard + nick_lb,0,10000-nick_lb);

write(1,nick,nick_lb);

retn0=read(0,keyboard + nick_lb,10000-nick_lb);

if(retn0==-1) {perror("read");printf("%d??/n",errno);break;}

send(sockfd0,keyboard,retn0 + nick_lb,0);

}

}

closesocket(sockfd0);

WSACleanup();

exit:

getch(); /* wait for a key to input ,like pause */

return 0;

}