2 * Routines for DDP packet disassembly.
4 * Simon Wilkinson <sxw@dcs.ed.ac.uk>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #ifdef HAVE_SYS_TYPES_H
31 # include <sys/types.h>
34 #ifdef HAVE_NETINET_IN_H
35 # include <netinet/in.h>
43 extern packet_info pi;
45 typedef struct _e_ddp {
46 #if BYTE_ORDER == BIG_ENDIAN
47 guint16 pad:2,hops:4,len:10;
49 guint16 len:10,hops:4,pad:2;
51 guint16 sum,dnet,snet;
57 #define DDP_RTMPDATA 0x01
61 #define DDP_RTMPREQ 0x05
66 dissect_ddp(const u_char *pd, int offset, frame_data *fd, GtkTree *tree) {
68 GtkWidget *ddp_tree, *ti;
69 value_string op_vals[] = { {DDP_RTMPDATA, "AppleTalk Routing Table response or data" },
70 {DDP_NBP, "AppleTalk Name Binding Protocol packet"},
71 {DDP_ATP, "AppleTalk Transaction Protocol packet"},
72 {DDP_AEP, "AppleTalk Echo Protocol packet"},
73 {DDP_RTMPREQ, "AppleTalk Routing Table request"},
74 {DDP_ZIP, "AppleTalk Zone Information Protocol packet"},
75 {DDP_ADSP, "AppleTalk Data Stream Protocol"},
78 memcpy(&ddp, &pd[offset], sizeof(e_ddp));
79 ddp.dnet=ntohs(ddp.dnet);
80 ddp.snet=ntohs(ddp.snet);
81 ddp.sum=ntohs(ddp.sum);
83 if (fd->win_info[COL_NUM]) {
84 strcpy(fd->win_info[COL_PROTOCOL], "DDP");
85 strcpy(fd->win_info[COL_INFO],
86 val_to_str(ddp.type, op_vals, "Unknown DDP protocol (%02x)"));
88 sprintf(fd->win_info[COL_SOURCE],"%d.%d:%d",ddp.snet,ddp.snode,ddp.sport);
89 sprintf(fd->win_info[COL_DESTINATION], "%d.%d:%d",ddp.dnet,ddp.dnode,ddp.dport);
93 ti = add_item_to_tree(GTK_WIDGET(tree), offset, 13,
94 "Datagram Delivery Protocol");
95 ddp_tree = gtk_tree_new();
96 add_subtree(ti, ddp_tree, ETT_IP);
97 add_item_to_tree(ddp_tree, offset, 1, "Hop count: %d", ddp.hops);
98 add_item_to_tree(ddp_tree, offset, 2, "Datagram length: %d", ddp.len);
99 add_item_to_tree(ddp_tree, offset + 2, 2, "Checksum: %d",ddp.sum);
100 add_item_to_tree(ddp_tree, offset + 4, 2, "Destination Net: %d",ddp.dnet);
101 add_item_to_tree(ddp_tree, offset + 6, 2, "Source Net: %d",ddp.snet);
102 add_item_to_tree(ddp_tree, offset + 8, 1, "Destination Node: %d",ddp.dnode);
103 add_item_to_tree(ddp_tree, offset + 9, 1, "Source Node: %d",ddp.snode);
104 add_item_to_tree(ddp_tree, offset + 10, 1, "Destination Socket: %d",ddp.dport);
105 add_item_to_tree(ddp_tree, offset + 11, 1, "Source Socket: %d",ddp.sport);
106 add_item_to_tree(ddp_tree, offset + 12, 1, "Type: %d",ddp.type);