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/*
nast
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "n_nast.h"
#ifdef HAVE_LIBNCURSES
# define Rst 0
# define Fin 1
int add(u_long ip_src,u_long ip_dst,u_short sport,u_short dport);
int del(u_long ip_src,u_long ip_dst,u_short sport,u_short dport, int flag);
int nconn = 0;
int lines = 1;
int z = 0;
int tmp;
int connection(char *dev,u_long ip_src,u_long ip_dst,u_short sport,u_short dport)
{
char errbuf[256];
struct libnet_ipv4_hdr *ip;
struct libnet_tcp_hdr *tcp;
pcap_t* descr;
pcap_dumper_t *dumper;
int k;
logd = stdout;
nmax = 2;
nconn = 0;
lines = 1;
z=0;
tcpdl = "STREAM";
if((descr=pcap_open_live(dev,BUFSIZ,1,0,errbuf)) == NULL)
{
w_error(1, "pcap_open_live: %s", errbuf);
}
/* create dumper for log the datas */
if ((dumper = pcap_dump_open(descr,tcpdl))==NULL)
{
w_error(1, "pcap_open_live() error: %s\n\n",errbuf);
}
offset=(device(dev,descr));
for(k=0;k<30;k++)
{
memset(&c_inf[k], 0, sizeof(c_inf[k]));
memset(&sf[k].string, 0, sizeof(sf[k].string));
memset(&sf[k].sfilter, 0, sizeof(sf[k].sfilter));
}
init_scr();
mvwprintw(winfo->win,0,2,"Source");
mvwprintw(winfo->win,0,21,"Port");
mvwprintw(winfo->win,0,34,"Destination");
mvwprintw(winfo->win,0,55,"Port");
mvwprintw(winfo->win,0,66,"State");
SAFE_SCROLL_REFRESH(winfo);
while(1)
{
if ((packet = (u_char *) pcap_next (descr, &hdr))!=NULL)
{
fflush((FILE *)dumper);
pcap_dump((u_char *)dumper,&hdr,packet);
ip = (struct libnet_ipv4_hdr *) (packet + offset);
tcp = (struct libnet_tcp_hdr *) (packet + offset + LIBNET_IPV4_H);
if (ip->ip_p == IPPROTO_TCP)
{
if (!sport && !dport)
{
if ( ip->ip_src.s_addr == ip_src && ip->ip_dst.s_addr == ip_dst)
{
switch(tcp->th_flags)
{
case TH_SYN:
add(ip_src,ip_dst,htons(tcp->th_sport),htons(tcp->th_dport));
break;
case TH_ACK:
break;
case TH_RST:
del(ip_src,ip_dst,htons(tcp->th_sport),htons(tcp->th_dport),Rst);
break;
case (TH_ACK|TH_PUSH):
break;
case (TH_URG|TH_ACK):
break;
case (TH_FIN|TH_ACK):
del(ip_src,ip_dst,htons(tcp->th_sport),htons(tcp->th_dport),Fin);
case (TH_RST|TH_ACK):
del(ip_src,ip_dst,htons(tcp->th_sport),htons(tcp->th_dport),Rst);
break;
default:
break;
}
}
/* caso rovescio */
else if ( ip->ip_src.s_addr == ip_dst && ip->ip_dst.s_addr == ip_src )
{
switch(tcp->th_flags)
{
case TH_SYN:
add(ip_dst,ip_src,htons(tcp->th_sport),htons(tcp->th_dport));
break;
case TH_ACK:
break;
case TH_RST:
del(ip_dst,ip_src,htons(tcp->th_sport),htons(tcp->th_dport),Rst);
break;
case (TH_ACK|TH_PUSH):
break;
case (TH_URG|TH_ACK):
break;
case (TH_FIN|TH_ACK):
del(ip_dst,ip_src,htons(tcp->th_sport),htons(tcp->th_dport),Fin);
case (TH_RST|TH_ACK):
del(ip_dst,ip_src,htons(tcp->th_sport),htons(tcp->th_dport),Rst);
break;
default:
break;
}
}
}
}
}
}
pcap_close(descr);
pcap_dump_close(dumper);
return 0;
}
int add(u_long ip_src,u_long ip_dst,u_short sport,u_short dport)
{
int i;
for(i=0;i<30;i++)
if((ip_src==c_inf[i].s_ip && ip_dst==c_inf[i].d_ip && sport==c_inf[i].s_port && dport==c_inf[i].d_port) || (ip_src==c_inf[i].d_ip && ip_dst==c_inf[i].s_ip && sport==c_inf[i].d_port && dport==c_inf[i].s_port))
return(0); /*ce l'ho gi� (duplicato)*/
for(i=0;i<30;i++)/*cerco spazio vuoto*/
{
if(c_inf[i].s_ip)continue;
else
{
c_inf[i].s_ip = ip_src;
c_inf[i].d_ip = ip_dst;
c_inf[i].s_port = sport;
c_inf[i].d_port = dport;
mvwprintw(winfo->win,lines,2,"%s",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,lines,21,"%d",c_inf[i].s_port);
mvwprintw(winfo->win,lines,34,"%s",libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,lines,55,"%d",c_inf[i].d_port);
mvwprintw(winfo->win,lines,66,"Open");
SAFE_SCROLL_REFRESH(winfo);
sprintf(sf[z].string, "%2s%12d%20s%12d Open",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
/* create the filter for tcp stream*/
sprintf(sf[z].sfilter,"host %s and port %d and host %s and port %d",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
c_inf[i].lin=lines;
sf[i].cont=z;
nconn++;
lines++;
z++;
++nmax;
return(1);
}
}
return(0);
}
int del(u_long ip_src,u_long ip_dst,u_short sport,u_short dport, int flag)
{
int i;
for(i=0;i<30;i++)
{
if(ip_src==c_inf[i].s_ip && ip_dst==c_inf[i].d_ip && sport==c_inf[i].s_port && dport==c_inf[i].d_port)
{ if(flag){
mvwprintw(winfo->win,c_inf[i].lin,2,"%s",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,21,"%d",c_inf[i].s_port);
mvwprintw(winfo->win,c_inf[i].lin,34,"%s",libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,55,"%d",c_inf[i].d_port);
mvwprintw(winfo->win,c_inf[i].lin,66,"Closed");
sprintf(sf[sf[i].cont].string,"%2s%12d%20s%14d Closed",
libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
}
else
{
mvwprintw(winfo->win,c_inf[i].lin,2,"%s",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,21,"%d",c_inf[i].s_port);
mvwprintw(winfo->win,c_inf[i].lin,34,"%s",libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,55,"%d",c_inf[i].d_port);
mvwprintw(winfo->win,c_inf[i].lin,66,"Resetted");
sprintf(sf[sf[i].cont].string, "%2s%12d%20s%13d Resetted",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
}
sprintf(sf[sf[i].cont].sfilter,"host %s and port %d and host %s and port %d",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
SAFE_SCROLL_REFRESH(winfo);
//wrefresh(winfo->win);
memset(&c_inf[i], 0, sizeof(c_inf[i]));
nconn--;
}
else if(ip_src==c_inf[i].d_ip && ip_dst==c_inf[i].s_ip && sport==c_inf[i].d_port && dport==c_inf[i].s_port)
{ if(flag){
mvwprintw(winfo->win,c_inf[i].lin,2,"%s",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,21,"%d",c_inf[i].s_port);
mvwprintw(winfo->win,c_inf[i].lin,34,"%s",libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,55,"%d",c_inf[i].d_port);
mvwprintw(winfo->win,c_inf[i].lin,66,"Closed");
sprintf(sf[sf[i].cont].string, "%2s%12d%20s%14d Closed",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
}
else
{
mvwprintw(winfo->win,c_inf[i].lin,2,"%s",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,21,"%d",c_inf[i].s_port);
mvwprintw(winfo->win,c_inf[i].lin,34,"%s",libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE));
mvwprintw(winfo->win,c_inf[i].lin,55,"%d",c_inf[i].d_port);
mvwprintw(winfo->win,c_inf[i].lin,66,"Resetted");
sprintf(sf[sf[i].cont].string, "%2s%12d%20s%13d Resetted",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
}
sprintf(sf[sf[i].cont].sfilter,"host %s and port %d and host %s and port %d",libnet_addr2name4(c_inf[i].s_ip, LIBNET_DONT_RESOLVE),c_inf[i].s_port,libnet_addr2name4(c_inf[i].d_ip, LIBNET_DONT_RESOLVE),c_inf[i].d_port);
SAFE_SCROLL_REFRESH(winfo);
memset(&c_inf[i], 0, sizeof(c_inf[i]));
nconn--;
}
}
return -1;
}
#endif
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