closeallfd();
}

int bind2conn(int port1,char *host,int port2)
{
int sockfd,sockfd1,sockfd2;
struct sockaddr_in remote;
int size;
int pid;
char buffer[1024];

memset(buffer,0,1024);
if((sockfd=create_socket())==0) exit(0);
if(create_serv(sockfd,port1)==0)
{
close(sockfd1);
exit(0);
}
size=sizeof(struct sockaddr);
while(1)
{
printf("waiting for response.........\n");
if((sockfd1=accept(sockfd,(struct sockaddr *)&remote,&size))<0){perror("accept error\n");continue;}
printf("accept a client from %s:%d\n",inet_ntoa(remote.sin_addr),ntohs(remote.sin_port));
if((sockfd2=create_socket())==0)
{
close(sockfd1);
continue;
}
printf("make a connection to %s:%d....",host,port2);
fflush(stdout);
if(client_connect(sockfd2,host,port2)==0)
{
close(sockfd2);
sprintf(buffer,"[SERVER]connection to %s:%d error\r\n",host,port2);
write(sockfd1,buffer,strlen(buffer));
memset(buffer,0,1024);
close(sockfd1);
continue;
}
printf("ok\r\n");
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
// sleep(2);
close(sockfd1);
close(sockfd2);
}

}

int bind2bind(int port1,int port2)
{
int fd1,fd2,sockfd1,sockfd2;
struct sockaddr_in client1,client2;
int size1,size2;
int pid;

if((fd1=create_socket())==0) exit(0);
if((fd2=create_socket())==0) exit(0);
printf("binding port %d......",port1);
fflush(stdout);
if(create_serv(fd1,port1)==0)
{
close(fd1);
exit(0);
}
printf("ok\r\n");
printf("binding port %d......",port2);
fflush(stdout);
if(create_serv(fd2,port2)==0)
{
close(fd2);
exit(0);
}
printf("ok\r\n");
size1=size2=sizeof(struct sockaddr);
while(1)
{
printf("waiting for response on port %d.........\n",port1);
if((sockfd1=accept(fd1,(struct sockaddr *)&client1,&size1))<0)
{
perror("accept1 error");
continue;
}
printf("accept a client on port %d from %s,waiting another on port %d....\n",port1,inet_ntoa(client1.sin_addr),port2);
if((sockfd2=accept(fd2,(struct sockaddr *)&client2,&size2))<0)
{
perror("accept2 error");
close(sockfd1);
continue;
}
printf("accept a client on port %d from %s\n",port2,inet_ntoa(client2.sin_addr));
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
//sleep(2);
close(sockfd1);
close(sockfd2);
}
}

int conn2conn(char *host1,int port1,char *host2,int port2)
{
int sockfd1,sockfd2;
int pid;

while(1)
{
if((sockfd1=create_socket())==0) exit(0);
if((sockfd2=create_socket())==0) exit(0);
printf("make a connection to %s:%d....",host1,port1);
fflush(stdout);
if(client_connect(sockfd1,host1,port1)==0)
{
close(sockfd1);
close(sockfd2);
break;
}
printf("ok\r\n");
printf("make a connection to %s:%d....",host2,port2);
fflush(stdout);
if(client_connect(sockfd2,host2,port2)==0)
{
close(sockfd1);
close(sockfd2);
break;
}
printf("ok\r\n");
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
//sleep(2);
close(sockfd1);
close(sockfd2);

}
}

void transdata(int fd1,int fd2)
{
struct timeva l timeset;
fd_set readfd,writefd;
int result,i=0;
char read_in1[MAXSIZE],send_out1[MAXSIZE];
char read_in2[MAXSIZE],send_out2[MAXSIZE];
int read1=0,totalread1=0,send1=0;
int read2=0,totalread2=0,send2=0;
int sendcount1,sendcount2;
int maxfd;
struct sockaddr_in client1,client2;
int structsize1,structsize2;
char host1[20],host2[20];
int port1=0,port2=0;
char tmpbuf1[100],tmpbuf2[100];