Initial revision

svn path=/trunk/; revision=2

1 files changed, 92 insertions, 0 deletions

diff --git a/packet-udp.c b/packet-udp.c
new file mode 100644
index 0000000000..f9d37c71fb
--- /dev/null
+++ b/packet-udp.c
@@ -0,0 +1,92 @@
+/* packet-udp.c
+ * Routines for UDP packet disassembly
+ *
+ * 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.
+ */
+ 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#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 "resolv.h"
+
+void
+dissect_udp(const u_char *pd, int offset, frame_data *fd, GtkTree *tree) {
+  e_udphdr  *uh;
+  guint16    uh_sport, uh_dport, uh_ulen, uh_sum;
+  GtkWidget *udp_tree, *ti;
+
+  /* To do: Check for {cap len,pkt len} < struct len */
+  uh = (e_udphdr *) &pd[offset];
+  uh_sport = ntohs(uh->uh_sport);
+  uh_dport = ntohs(uh->uh_dport);
+  uh_ulen  = ntohs(uh->uh_ulen);
+  uh_sum   = ntohs(uh->uh_sum);
+  
+  if (fd->win_info[0]) {
+    strcpy(fd->win_info[3], "UDP");
+    sprintf(fd->win_info[4], "Source port: %s  Destination port: %s",
+	    get_udp_port(uh_sport), get_udp_port(uh_dport));
+  }
+  
+  if (tree) {
+    ti = add_item_to_tree(GTK_WIDGET(tree), offset, 8,
+      "User Datagram Protocol");
+    udp_tree = gtk_tree_new();
+    add_subtree(ti, udp_tree, ETT_UDP);
+    add_item_to_tree(udp_tree, offset,     2, "Source port: %s", get_udp_port(uh_sport));
+    add_item_to_tree(udp_tree, offset + 2, 2, "Destination port: %s", get_udp_port(uh_dport));
+    add_item_to_tree(udp_tree, offset + 4, 2, "Length: %d", uh_ulen);
+    add_item_to_tree(udp_tree, offset + 6, 2, "Checksum: 0x%04x", uh_sum);
+  }
+
+  /* Skip over header */
+  offset += 8;
+
+  /* To do: make sure we aren't screwing ourselves with the MIN call. */
+  switch (MIN(uh_sport, uh_dport)) {
+    case UDP_PORT_BOOTPS:
+      dissect_bootp(pd, offset, fd, tree);
+      break;
+    case UDP_PORT_DNS:
+      dissect_dns(pd, offset, fd, tree);
+      break;
+    case UDP_PORT_RIP:
+      /* we should check the source port too (RIP: UDP src and dst port 520) */
+      dissect_rip(pd, offset, fd, tree);
+      break;
+    default:
+      dissect_data(pd, offset, fd, tree);
+  }
+}