forked from osmocom/wireshark
218 lines
6.3 KiB
C
218 lines
6.3 KiB
C
/* packet-atalk.c
|
|
* Routines for Appletalk packet disassembly (DDP, currently).
|
|
*
|
|
* $Id: packet-atalk.c,v 1.22 1999/11/16 11:42:25 guy Exp $
|
|
*
|
|
* 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
|
|
|
|
#ifdef HAVE_NETINET_IN_H
|
|
# include <netinet/in.h>
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include "globals.h"
|
|
#include "packet.h"
|
|
#include "packet-atalk.h"
|
|
|
|
static int proto_ddp = -1;
|
|
static int hf_ddp_hopcount = -1;
|
|
static int hf_ddp_len = -1;
|
|
static int hf_ddp_checksum = -1;
|
|
static int hf_ddp_dst_net = -1;
|
|
static int hf_ddp_src_net = -1;
|
|
static int hf_ddp_dst_node = -1;
|
|
static int hf_ddp_src_node = -1;
|
|
static int hf_ddp_dst_socket = -1;
|
|
static int hf_ddp_src_socket = -1;
|
|
static int hf_ddp_type = -1;
|
|
|
|
static gint ett_ddp = -1;
|
|
|
|
/* 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
|
|
#define DDP_HEADER_SIZE 13
|
|
|
|
gchar *
|
|
atalk_addr_to_str(const struct atalk_ddp_addr *addrp)
|
|
{
|
|
static gchar str[3][14];
|
|
static gchar *cur;
|
|
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
|
|
sprintf(cur, "%u.%u:%u", addrp->net, addrp->node, addrp->port);
|
|
return cur;
|
|
}
|
|
|
|
static const 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}
|
|
};
|
|
|
|
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;
|
|
static struct atalk_ddp_addr src, dst;
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, DDP_HEADER_SIZE)) {
|
|
dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
memcpy(&ddp, &pd[offset], sizeof(e_ddp));
|
|
ddp.dnet=ntohs(ddp.dnet);
|
|
ddp.snet=ntohs(ddp.snet);
|
|
ddp.sum=ntohs(ddp.sum);
|
|
|
|
src.net = ddp.snet;
|
|
src.node = ddp.snode;
|
|
src.port = ddp.sport;
|
|
dst.net = ddp.dnet;
|
|
dst.node = ddp.dnode;
|
|
dst.port = ddp.dport;
|
|
SET_ADDRESS(&pi.net_src, AT_ATALK, sizeof src, (guint8 *)&src);
|
|
SET_ADDRESS(&pi.src, AT_ATALK, sizeof src, (guint8 *)&src);
|
|
SET_ADDRESS(&pi.net_dst, AT_ATALK, sizeof dst, (guint8 *)&dst);
|
|
SET_ADDRESS(&pi.dst, AT_ATALK, sizeof dst, (guint8 *)&dst);
|
|
|
|
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, proto_ddp, offset, DDP_HEADER_SIZE, NULL);
|
|
ddp_tree = proto_item_add_subtree(ti, ett_ddp);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_hopcount, offset, 1,
|
|
ddp_hops(ddp.hops_len));
|
|
proto_tree_add_item(ddp_tree, hf_ddp_len, offset, 2,
|
|
ddp_len(ddp.hops_len));
|
|
proto_tree_add_item(ddp_tree, hf_ddp_checksum, offset + 2, 2, ddp.sum);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_dst_net, offset + 4, 2, ddp.dnet);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_src_net, offset + 6, 2, ddp.snet);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_dst_node, offset + 8, 1, ddp.dnode);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_src_node, offset + 9, 1, ddp.snode);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_dst_socket, offset + 10, 1, ddp.dport);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_src_socket, offset + 11, 1, ddp.sport);
|
|
proto_tree_add_item(ddp_tree, hf_ddp_type, offset + 12, 1, ddp.type);
|
|
}
|
|
|
|
offset += DDP_HEADER_SIZE;
|
|
|
|
dissect_data(pd, offset, fd, tree);
|
|
}
|
|
|
|
void
|
|
proto_register_atalk(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_ddp_hopcount,
|
|
{ "Hop count", "ddp.hopcount", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_len,
|
|
{ "Datagram length", "ddp.len", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_checksum,
|
|
{ "Checksum", "ddp.checksum", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_dst_net,
|
|
{ "Destination Net", "ddp.dst.net", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_src_net,
|
|
{ "Source Net", "ddp.src.net", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_dst_node,
|
|
{ "Destination Node", "ddp.dst.node", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_src_node,
|
|
{ "Source Node", "ddp.src.node", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_dst_socket,
|
|
{ "Destination Socket", "ddp.dst.socket", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_src_socket,
|
|
{ "Source Socket", "ddp.src.socket", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_type,
|
|
{ "Protocol type", "ddp.type", FT_UINT8, BASE_DEC, VALS(op_vals), 0x0,
|
|
"" }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_ddp,
|
|
};
|
|
|
|
proto_ddp = proto_register_protocol("Datagram Delivery Protocol", "ddp");
|
|
proto_register_field_array(proto_ddp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|