forked from osmocom/wireshark
112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/* packet-ddp.c
|
|
* Routines for DDP packet disassembly.
|
|
*
|
|
* Simon Wilkinson <sxw@dcs.ed.ac.uk>
|
|
*
|
|
* 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
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
# include <sys/types.h>
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include "packet.h"
|
|
|
|
#ifdef HAVE_NETINET_IN_H
|
|
# include <netinet/in.h>
|
|
#endif
|
|
|
|
extern packet_info pi;
|
|
|
|
/* P = Padding, H = Hops, L = Len */
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
/* PPHHHHLL LLLLLLLL */
|
|
#define ddp_hops(x) ( ( x >> 10) & 0x3C )
|
|
#define ddp_len(x) ( x & 0x03ff )
|
|
#else
|
|
/* LLLLLLLL PPHHHHLL*/
|
|
#define ddp_hops(x) ( x & 0x3C )
|
|
#define ddp_len(x) ( ntohs(x) & 0x03ff )
|
|
#endif
|
|
typedef struct _e_ddp {
|
|
guint16 hops_len; /* combines pad, hops, and len */
|
|
guint16 sum,dnet,snet;
|
|
guint8 dnode,snode;
|
|
guint8 dport,sport;
|
|
guint8 type;
|
|
} e_ddp;
|
|
|
|
#define DDP_RTMPDATA 0x01
|
|
#define DDP_NBP 0x02
|
|
#define DDP_ATP 0x03
|
|
#define DDP_AEP 0x04
|
|
#define DDP_RTMPREQ 0x05
|
|
#define DDP_ZIP 0x06
|
|
#define DDP_ADSP 0x07
|
|
|
|
void
|
|
dissect_ddp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
e_ddp ddp;
|
|
proto_tree *ddp_tree;
|
|
proto_item *ti;
|
|
value_string op_vals[] = { {DDP_RTMPDATA, "AppleTalk Routing Table response or data" },
|
|
{DDP_NBP, "AppleTalk Name Binding Protocol packet"},
|
|
{DDP_ATP, "AppleTalk Transaction Protocol packet"},
|
|
{DDP_AEP, "AppleTalk Echo Protocol packet"},
|
|
{DDP_RTMPREQ, "AppleTalk Routing Table request"},
|
|
{DDP_ZIP, "AppleTalk Zone Information Protocol packet"},
|
|
{DDP_ADSP, "AppleTalk Data Stream Protocol"},
|
|
{0, NULL} };
|
|
|
|
memcpy(&ddp, &pd[offset], sizeof(e_ddp));
|
|
ddp.dnet=ntohs(ddp.dnet);
|
|
ddp.snet=ntohs(ddp.snet);
|
|
ddp.sum=ntohs(ddp.sum);
|
|
|
|
if (check_col(fd, COL_RES_NET_SRC))
|
|
col_add_fstr(fd, COL_RES_NET_SRC, "%d.%d:%d", ddp.snet, ddp.snode, ddp.sport);
|
|
if (check_col(fd, COL_RES_NET_DST))
|
|
col_add_fstr(fd, COL_RES_NET_DST, "%d.%d:%d", ddp.dnet, ddp.dnode, ddp.dport);
|
|
if (check_col(fd, COL_PROTOCOL))
|
|
col_add_str(fd, COL_PROTOCOL, "DDP");
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_str(fd, COL_INFO,
|
|
val_to_str(ddp.type, op_vals, "Unknown DDP protocol (%02x)"));
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, offset, 13, "Datagram Delivery Protocol");
|
|
ddp_tree = proto_tree_new();
|
|
proto_item_add_subtree(ti, ddp_tree, ETT_IP);
|
|
proto_tree_add_item(ddp_tree, offset, 1, "Hop count: %d", ddp_hops(ddp.hops_len));
|
|
proto_tree_add_item(ddp_tree, offset, 2, "Datagram length: %d", ddp_len(ddp.hops_len));
|
|
proto_tree_add_item(ddp_tree, offset + 2, 2, "Checksum: %d",ddp.sum);
|
|
proto_tree_add_item(ddp_tree, offset + 4, 2, "Destination Net: %d",ddp.dnet);
|
|
proto_tree_add_item(ddp_tree, offset + 6, 2, "Source Net: %d",ddp.snet);
|
|
proto_tree_add_item(ddp_tree, offset + 8, 1, "Destination Node: %d",ddp.dnode);
|
|
proto_tree_add_item(ddp_tree, offset + 9, 1, "Source Node: %d",ddp.snode);
|
|
proto_tree_add_item(ddp_tree, offset + 10, 1, "Destination Socket: %d",ddp.dport);
|
|
proto_tree_add_item(ddp_tree, offset + 11, 1, "Source Socket: %d",ddp.sport);
|
|
proto_tree_add_item(ddp_tree, offset + 12, 1, "Type: %d",ddp.type);
|
|
}
|
|
|
|
offset += 13;
|
|
|
|
}
|