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/* packet-ospf.c
* Routines for RIPv1 and RIPv2 packet disassembly
* (c) Copyright Hannes R. Boehm <hannes@boehm.org>
*
* $Id: packet-rip.c,v 1.3 1998/09/27 22:12:38 gerald Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* Copyright 1998 Gerald Combs
*
*
* 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 "config.h"
#include <gtk/gtk.h>
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include "ethereal.h"
#include "packet.h"
#include "packet-rip.h"
void
dissect_rip(const u_char *pd, int offset, frame_data *fd, GtkTree *tree) {
e_riphdr *rip_header;
e_rip_vektor rip_vektor;
int auth = FALSE;
GtkWidget *rip_tree = NULL, *ti;
GtkWidget *rip_vektor_tree;
/* we do the range checking of the index when checking wether or not this is a RIP packet */
char *packet_type[8] = { "never used", "Request", "Response",
"Traceon", "Traceoff", "Vendor specific (Sun)" };
char *version[3] = { "RIP", "RIPv1", "RIPv2" };
rip_header = (e_riphdr *) &pd[offset];
/* Check if we 've realy got a RIP packet */
switch(rip_header->version) {
case RIPv1:
/* the domain field has to be set to zero for RIPv1 */
if(!(rip_header->domain == 0)){
dissect_data(pd, offset, fd, tree);
return;
}
/* the RIPv2 checks are also made for v1 packets */
case RIPv2:
/* check wether or not command nr. is between 1-7
* (range checking for index of char* packet_type is done at the same time)
*/
if( !( (rip_header->command > 0) && (rip_header->command <= 7) )){
dissect_data(pd, offset, fd, tree);
return;
}
break;
default:
/* we only know RIPv1 and RIPv2 */
dissect_data(pd, offset, fd, tree);
return;
}
if (fd->win_info[COL_NUM]) {
strcpy(fd->win_info[COL_PROTOCOL], version[rip_header->version] );
sprintf(fd->win_info[COL_INFO], "%s", packet_type[rip_header->command]);
}
if (tree) {
ti = add_item_to_tree(GTK_WIDGET(tree), offset, (fd->cap_len - offset), "Routing Information Protocol");
rip_tree = gtk_tree_new();
add_subtree(ti, rip_tree, ETT_RIP);
add_item_to_tree(rip_tree, offset + 1, 1, "Version: %d", rip_header->version);
add_item_to_tree(rip_tree, offset, 1, "Command: %d (%s)", rip_header->command, packet_type[rip_header->command]);
switch(ntohs(rip_header->family)){
case 2: /* IP */
add_item_to_tree(rip_tree, offset + 4 , 2, "Address Family ID: IP");
break;
case 0xFFFF:
add_item_to_tree(rip_tree, offset + 4 , 2, "Authenticated Packet");
auth = TRUE;
break;
default:
/* return; */
}
if(rip_header->version == RIPv2) {
add_item_to_tree(rip_tree, offset + 2 , 2, "Routing Domain: %d", ntohs(rip_header->domain));
add_item_to_tree(rip_tree, offset + 6 , 2, "Route Tag: %d", ntohs(rip_header->tag));
}
/* skip header */
offset += RIP_HEADER_LENGTH;
/* if present, skip the authentication */
if(auth){
offset += RIP_VEKTOR_LENGTH;
}
/* zero or more distance vektors */
while((fd->cap_len - offset) >= RIP_VEKTOR_LENGTH){
ti = add_item_to_tree(GTK_WIDGET(rip_tree), offset, RIP_VEKTOR_LENGTH, "RIP Vektor");
rip_vektor_tree = gtk_tree_new();
add_subtree(ti, rip_vektor_tree, ETT_RIP_VEC);
memcpy(&rip_vektor, &pd[offset], sizeof(rip_vektor)); /* avoid alignment problem */
add_item_to_tree(rip_vektor_tree, offset, 4, "IP Address: %s", ip_to_str((guint8 *) &(rip_vektor.ip)));
if(rip_header->version == RIPv2) {
add_item_to_tree(rip_vektor_tree, offset + 4 , 4, "Netmask: %s",
ip_to_str((guint8 *) &(rip_vektor.mask)));
add_item_to_tree(rip_vektor_tree, offset + 8 , 4, "Next Hop: %s",
ip_to_str((guint8 *) &(rip_vektor.next_hop)));
}
add_item_to_tree(rip_vektor_tree, offset + 12 , 4, "Metric: %ld", (long)ntohl(rip_vektor.metric));
offset += RIP_VEKTOR_LENGTH;
};
}
}
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