<![CDATA[/*
* Chargen Server
*
* Run: ./chargen <chargen_port>
*
*
* Author: Gabriel Maggiotti, Fernando Oubiņa
* Email: gmaggiot@ciudad.com.ar, foubina@qb0x.net
* Webpage: http://qb0x.net
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <malloc.h>
#define BACKLOG 5
#define MAX 500
int
main(int argc, char *argv[])
{
int visit=1;
int i;
int port;
int sockfd;
int newfd;
int numbytes;
char buf[MAX];
char diedbuf[1024];
struct sockaddr_in my_addr;
struct sockaddr_in their_addr;
int sin_size;
if(argc!=2) {
fprintf(stderr,"usage: %s <chargen_port>\n",argv[0]);
return 1;
}
port=atoi(argv[1]);
if( (sockfd=socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
exit(1);
}
my_addr.sin_family=AF_INET;
my_addr.sin_port=htons(port);
my_addr.sin_addr.s_addr=htonl(INADDR_ANY);
bzero( &(my_addr.sin_zero),8);
if( bind(sockfd, (struct sockaddr *) &my_addr,\
sizeof(struct sockaddr) ) == -1)
{
perror("bind");
exit(1);
}
if( listen(sockfd, BACKLOG) == -1)
{
perror("listen");
exit(1);
}
for(i=0;i<1024;i++)
diedbuf[i] = 'q';
while(1)
{
sin_size=sizeof( struct sockaddr_in);
if( (newfd=accept(sockfd,(struct sockaddr*)&their_addr,\
&sin_size))== -1)
{
perror("accept");
exit(1);
}
printf("Visit number: %d\n",visit++);
if(!fork())
{
int i=1;
if( (numbytes=recv(newfd,buf,MAX,0))==-1 )
{
perror("recv");
exit(1);
}
buf[numbytes]='\0';
printf("%s\n",buf);
while(1)
{
if(send(newfd,diedbuf,1024,0) ==-1)
{
perror("send");
exit(0);
}
}
}
}
close(newfd);
}
]]>