Initial revision

svn path=/trunk/; revision=2

1 files changed, 144 insertions, 0 deletions

diff --git a/packet-rip.c b/packet-rip.c
new file mode 100644
index 0000000000..d0e0bbe337
--- /dev/null
+++ b/packet-rip.c
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+/* packet-ospf.c
+ * Routines for RIPv1 and RIPv2 packet disassembly
+ * (c) Copyright Hannes R. Boehm <hannes@boehm.org>
+ *
+ * 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[0]) {
+        strcpy(fd->win_info[3], version[rip_header->version] );
+        sprintf(fd->win_info[4], "%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: %d", ntohl(rip_vektor.metric)); 
+
+            offset += RIP_VEKTOR_LENGTH;
+        };
+    }
+}