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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 "include/nast.h"
void handle_ICMP (u_short d, u_short x, FILE *output, FILE *ldd)
{
struct libnet_ipv4_hdr *ip;
struct libnet_icmpv4_hdr *icmp;
u_short size_ip, size_icmp, size_buf;
size_ip = LIBNET_IPV4_H;
size_icmp = LIBNET_ICMPV4_H; /* base ICMP header lenght */
size_buf = 0;
ip = (struct libnet_ipv4_hdr *) (packet+offset);
icmp = (struct libnet_icmpv4_hdr *) (packet+size_ip+offset);
n_print("princ",line_s,row_s,lg,"\n---[ ICMP ]----------------------------------------------------------\n");
n_print("princ",line_s=line_s+2,row_s,lg,"%s", inet_ntoa(ip->ip_src));
n_print("princ",line_s,16,lg," -> ");
n_print("princ",line_s,24,lg,"%s\n", inet_ntoa(ip->ip_dst));
n_print("princ",++line_s,row_s,lg,"Version: %d\t", ip->ip_v);
n_print("princ",line_s,20,lg,"Lenght: %d\t", ntohs(ip->ip_len));
n_print("princ",line_s,35,lg,"TTL: %d\n", ip->ip_ttl);
n_print("princ",++line_s,row_s,lg,"Type: ");
row_s = 8;
switch((icmp->icmp_type))
{
case 0:
n_print("princ",line_s,row_s,lg,"Echo reply\n");
size_icmp+=4;
break;
case 3:
n_print("princ",line_s,row_s,lg,"Dest_unreach: ");
size_icmp+=4;
switch (icmp->icmp_code)
{
case 0:
n_print("princ",line_s,28,lg,"Network Unreachable\n");
break;
case 1:
n_print("princ",line_s,28,lg,"Host Unreachable\n");
break;
case 2:
n_print("princ",line_s,28,lg,"Protocol Unreachable\n");
break;
case 3:
n_print("princ",line_s,28,lg,"Port Unreachable\n");
break;
case 4:
n_print("princ",line_s,28,lg,"Fragmentation neded (DF)\n");
break;
case 5:
n_print("princ",line_s,28,lg,"Source route failed\n");
break;
case 6:
n_print("princ",line_s,28,lg,"Destination network unknown\n");
break;
case 7:
n_print("princ",line_s,28,lg,"Destination host unknown\n");
break;
case 8:
n_print("princ",line_s,28,lg,"Source host isolated\n");
break;
case 9:
n_print("princ",line_s,28,lg,"Destination network administratively prohibited\n");
break;
case 10:
n_print("princ",line_s,28,lg,"Destination host administratively prohibited\n");
break;
case 11:
n_print("princ",line_s,28,lg,"Network unreacjable(tOS)\n");
break;
case 12:
n_print("princ",line_s,28,lg,"Host Unreachable (tOS)\n");
break;
case 13:
n_print("princ",line_s,28,lg,"Communication administratively prohibited\n");
break;
case 14:
n_print("princ",line_s,28,lg,"Host precedence violation\n");
break;
case 15:
n_print("princ",line_s,28,lg,"Precedence cutoff in effect\n");
break;
default:
n_print("princ",line_s,28,lg,"Unknown - error?\n");
break;
}
break;
case 4:
n_print("princ",line_s,row_s,lg,"Source quench\n");
size_icmp+=4;
break;
case 5:
n_print("princ",line_s,row_s,lg,"Redirect: ");
size_icmp+=4;
switch(icmp->icmp_code)
{
case 0:
n_print("princ",line_s,28,lg,"Redirect for network\n");
break;
case 1:
n_print("princ",line_s,28,lg, "Redirect for host\n");
break;
case 2:
n_print("princ",line_s,28,lg,"Redircet for tos & network\n");
break;
case 3:
n_print("princ",line_s,28,lg,"Redirect for tos & host\n");
break;
default:
n_print("princ",line_s,28,lg,"Unknown - error?\n");
break;
}
break;
case 8:
n_print("princ",line_s,row_s,lg,"Echo request\n");
size_icmp+=4;
break;
case 11:
n_print("princ",line_s,row_s,lg,"Time exceeded: ");
size_icmp+=4;
switch (icmp->icmp_code)
{
case 0:
n_print("princ",line_s,28,lg,"TTL (0) during transit\n");
break;
case 1:
n_print("princ",line_s,28,lg,"TTL (0) during reassembly\n");
break;
default:
n_print("princ",line_s,28,lg,"Unknown - error?\n");
break;
}
break;
case 12:
n_print("princ",line_s,row_s,lg,"Parameter problem: ");
switch (icmp->icmp_code)
{
case 0:
n_print("princ",line_s,28,lg,"IP header bad\n");
break;
case 1:
n_print("princ",line_s,28,lg,"Requiring option missing\n");
break;
}
break;
case 13:
n_print("princ",line_s,row_s,lg,"Timestamp\n");
size_icmp+=16;
break;
case 14:
n_print("princ",line_s,row_s,lg,"Timestamp reply\n");
size_icmp+=16;
break;
case 15:
n_print("princ",line_s,row_s,lg,"Information\n");
break;
case 16:
n_print("princ",line_s,row_s,lg,"Information reply\n");
break;
case 17:
n_print("princ",line_s,row_s,lg,"Address mask\n");
size_icmp+=8;
break;
case 18:
n_print("princ",line_s,row_s,lg,"Address mask reply\n");
size_icmp+=8;
break;
default:
n_print("princ",line_s,row_s,lg, "%i\n", icmp->icmp_type);
break;
}
n_print("princ",++line_s,0,lg,"Packet Number: %d",npkt);
if(!graph)
printf("\n");
size_buf = ntohs(ip->ip_len) - size_ip - size_icmp;
row_s=0;
++line_s;
if (size_buf)
{
buf = (char *) (packet + size_ip + size_icmp + offset);
if (d)
{
n_print("princ",line_s,row_s,lg,"\n---[ ICMP Data ]-----------------------------------------------------\n");
data_sniffo (buf, size_buf, output);
line_s+=2;
}
if (x)
{
n_print("princ",line_s,row_s,lg,"\n---[ ICMP Hex-Ascii Data ]-------------------------------------------");
print_ascii_hex (buf, size_buf, output);
line_s+=2;
}
/* log data (payload only) */
if (ldd)
{
fprintf(ldd, "%s -> %s ICMP\n", inet_ntoa(ip->ip_src), inet_ntoa(ip->ip_dst));
data_sniffo (buf, size_buf, ldd);
fprintf(ldd, "\n");
}
}
row_s = 0;
}
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