fix computer errors

I’m suppose to do this program and make it work in windows os and linux but i can’t seem to make it run. i always get an error. can you tell me wats wrong? should i include some more commands? i’m new in this socket programming thing and i really need help.
here’s the program:
#include
#include /* exit() */
#include /* memset (), memcpy()*/
#include /* uname()*/
#include
#include /* socket(), bind(), listen(),accept()*/
#include
#include
#include
#include /* fork(), write(), close()*/
int_GetHostName(char *buffer, int length);
const char MESSAGE[] = “Hello, World!\n”;
const int BACK_LOG=5;
int main(int argc, char *argv[]){
int serverSocket=0, on=0, port=0,status=0,childPid=0;
struct hostent *hostPtr=NULL;
char hostname[80]=”";
struct sockaddr_in serverName={0};
if (2!=argc){
fprintf(stderr,”Usage: %s \n”,argv[0]);
}
port=atoi(argv[1]);
serverSocket=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if(-1==serverSocket){
perror(“socket()”);
exit;
}
/* turn off bind address checking, and allow port numbers to be reused –
otherwise the TIME_WAIT phenomenon will prevent binding to these address.port
combinations for (2*MSL) seconds.
*/
on=1;
status=setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&on,sizeof(on));
if(-1==status){
perror(“setsockopt(…,SO_REUSEADDR,…
}
/* when connection is closed, thereis a need to linger to ensure all data is transmitted,
so turn this on also
*/
{
struct linger linger={0};
linger.1_onoff=1;
linger.1_linger=30;
status=setsockopt(serverSocket,SOL_S… char*)&linger,sizeof(linger));
if(-1==status){
perror(“setsockopt(…,SO_LINGER,..…
}
}
// FIND OUT WHO I AM
status=_GetHostName(hostname,sizeof(h…
if(-1==status){
perror(“_GetHostName()”);
exit(1);
}
hostPtr=gethostbyname(hostname);
if(NULL==hostPtr){
perror(“gethostbyname()”);
exit(1);
}
(void)memset(&serverName,0,sizeof(ser…
(void)memcpy(&serverName.sin_addr,hos…
/* to allow server be contactable on any of its IP addresses, uncomnment the following line of code
serverName.sin_addr=hton1(INADDR_ANY…
*/
serverName.sin_family=AF_INET;
serverName.sin_port=htons(port); //network order
status=bind(serverSocket,(structsocka…
if(-1==status){
perror(“bind()”);
exit(1);
}
status=listen(serverSocket,BACK_LOG);
if(-1==status){
perror(“listen()”);
exit(1);
}
for(;;){
struct sockaddr_in clientName={0};
int slaveSocket, clientLength=sizeof(clientName);
(void)memset(&clientName,0,sizeof(cl…
slaveSocket=accept(serverSocket,(str… sockaddr*)&clientName,&clientLength);
if(-1==slaveSocket){
perror(“accept()”);
exit(1);
}
childPid=fork();
switch(childPid){
case -1: /* ERROR */
perror(“fork()”);
exit(1);
case 0: /* child process */
close(serverSocket);
if(-1==getpeername(slaveSocket,(s… sockaddr*)&clientName,&clientLength)){
perror(“getpeername()”);
}else{
printf(“Connectionrequest from %s \n”; , inet_ntoa(clientName.sin_addr));
}
/* Server application spoecific code goes here,
e.g.perform some action, respond to client etc.
*/
write(slaveSocket,MESSAGE,strlen(…
close(slaveSocket);
exit(0);
default: /*parentprocess*/
close(slaveSocket);
}
}
return 0;
}
/* Local replacement of gethostname() to aid portability */
int _GetHostName(char *buffer, int length){
struct utsname sysname={0};
int status=0;
status=uname(&sysname);
if(-1!=status){
strncpy(buffer,sysname.nodename,len…
}
return(status);
}
please help..

Tags: Anyone, Client, Hello, Help, Program, Server., With, World

This entry was posted on Tuesday, February 9th, 2010 at 12:05 pm and is filed under sys files. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.