int main(int argc, char **argv)
{
int sockfd, ret;
float ti, rt;
long len;
struct sockaddr_in ser_addr;
char ** pptr;
struct hostent *sh;
struct in_addr **addrs;
FILE *fp;
if (argc != 2) {
printf("parameters not match");
}
if ((sh=gethostbyname(argv[1]))==NULL) { //get host's information
printf("error when gethostbyname");
exit(0);
}
printf("canonical name: %s\n", sh->h_name); //print the remote host's information
for (pptr=sh->h_aliases; *pptr != NULL; pptr++)
printf("the aliases name is: %s\n", *pptr);
switch(sh->h_addrtype)
{
case AF_INET:
printf("AF_INET\n");
break;
default:
printf("unknown addrtype\n");
break;
}
addrs = (struct in_addr **)sh->h_addr_list;
sockfd = socket(AF_INET, SOCK_DGRAM, 0); //create the socket
if (sockfd <0)
{
printf("error in socket");
exit(1);
}
ser_addr.sin_family = AF_INET;
ser_addr.sin_port = htons(MYUDP_PORT);
memcpy(&(ser_addr.sin_addr.s_addr), *addrs, sizeof(struct in_addr));
bzero(&(ser_addr.sin_zero), 8);
if((fp = fopen ("myfile.txt","r+t")) == NULL)
{
printf("File doesn't exit\n");
exit(0);
}
ti = str_cli1(fp, sockfd, (struct sockaddr *)&ser_addr, sizeof(struct sockaddr_in), &len); // receive and send
rt = (len/(float)ti); //caculate the average transmission rate
printf("Time(ms) : %.3f, Data sent(byte): %d\nData rate: %f (Kbytes/s)\n", ti, (int)len, rt);
close(sockfd);
fclose(fp);
exit(0);
}
int main( int argc, char **argv )
{
int fd[2];
int sockfd;
struct sockaddr_in servaddr;
char string[MAXLINE];
/* Take in read and write end pipe fd's for writing statuses back to parent process */
sscanf( argv[2], "%d %d", &fd[0], &fd[1] );
strcpy( string, "Connecting to port 61616 for echo service..\n" );
write( fd[1], string, ( strlen(string)+1 ) );
sockfd = socket( AF_INET, SOCK_STREAM, 0 );
/* Filling in the socket address structure with server address parameters for time service*/
bzero( &servaddr, sizeof( servaddr ) );
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons( 61616 );
inet_pton( AF_INET, argv[1], &servaddr.sin_addr );
/* Attempting connection with server */
if( connect( sockfd, (SA *) &servaddr, sizeof( servaddr ) ) == -1 )
{
memset( string, 0, sizeof( string ) );
strcpy( string, "SERVER_UNAVAILABLE\n" );
write( fd[1], string, ( strlen(string)+1 ) );
return 1;
}
memset( string, 0, sizeof( string ) );
strcpy( string, "Connected to server echo service..\n" );
write( fd[1], string, ( strlen(string)+1 ) );
/* Calling time client function to handle service */
str_cli1( stdin, sockfd, fd[1] ); /* do it all */
close( sockfd );
return 1;
}
