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wireshark/epan/dissectors/packet-dsi.c

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/* packet-dsi.c
* Routines for dsi packet dissection
* Copyright 2001, Randy McEoin <rmceoin@pe.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from packet-pop.c
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include "packet-tcp.h"
#include "packet-afp.h"
/* The information in this module (DSI) comes from:
AFP 2.1 & 2.2 documentation, in PDF form, at
http://developer.apple.com/DOCUMENTATION/macos8/pdf/ASAppleTalkFiling2.1_2.2.pdf
The netatalk source code by Wesley Craig & Adrian Sun
The Data Stream Interface description from
http://developer.apple.com/documentation/Networking/Conceptual/AFPClient/AFPClient-6.html
(no longer available, apparently)
Also, AFP 3.3 documents parts of DSI at:
http://developer.apple.com/mac/library/documentation/Networking/Conceptual/AFP/Introduction/Introduction.html
* What a Data Stream Interface packet looks like:
* 0 32
* |-------------------------------|
* |flags |command| requestID |
* |-------------------------------|
* |error code/enclosed data offset|
* |-------------------------------|
* |total data length |
* |-------------------------------|
* |reserved field |
* |-------------------------------|
*/
#define INET6_ADDRLEN 16
void proto_register_dsi(void);
void proto_reg_handoff_dsi(void);
static int proto_dsi = -1;
static int hf_dsi_flags = -1;
static int hf_dsi_command = -1;
static int hf_dsi_requestid = -1;
static int hf_dsi_offset = -1;
static int hf_dsi_error = -1;
static int hf_dsi_length = -1;
static int hf_dsi_reserved = -1;
static gint ett_dsi = -1;
static int hf_dsi_open_type = -1;
static int hf_dsi_open_len = -1;
static int hf_dsi_open_quantum = -1;
static int hf_dsi_replay_cache_size = -1;
static int hf_dsi_open_option = -1;
static int hf_dsi_attn_flag = -1;
static int hf_dsi_attn_flag_shutdown = -1;
static int hf_dsi_attn_flag_crash = -1;
static int hf_dsi_attn_flag_msg = -1;
static int hf_dsi_attn_flag_reconnect = -1;
static int hf_dsi_attn_flag_time = -1;
static int hf_dsi_attn_flag_bitmap = -1;
static gint ett_dsi_open = -1;
static gint ett_dsi_attn = -1;
static gint ett_dsi_attn_flag = -1;
static const value_string dsi_attn_flag_vals[] = {
{0x0, "Reserved" }, /* 0000 */
{0x1, "Reserved" }, /* 0001 */
{0x2, "Server message" }, /* 0010 */
{0x3, "Server notification, cf. extended bitmap" }, /* 0011 */
{0x4, "Server is shutting down, internal error" }, /* 0100 */
{0x8, "Server is shutting down" }, /* 1000 */
{0x9, "Server disconnects user" }, /* 1001 */
{0x10,"Server is shutting down, message" }, /* 1010 */
{0x11,"Server is shutting down, message,no reconnect"}, /* 1011 */
{0, NULL } };
static value_string_ext dsi_attn_flag_vals_ext = VALUE_STRING_EXT_INIT(dsi_attn_flag_vals);
static const value_string dsi_open_type_vals[] = {
{0, "Server quantum" },
{1, "Attention quantum" },
{2, "Replay cache size" },
{0, NULL } };
/* status stuff same for asp and afp */
static int hf_dsi_server_name = -1;
static int hf_dsi_utf8_server_name_len = -1;
static int hf_dsi_utf8_server_name = -1;
static int hf_dsi_server_type = -1;
static int hf_dsi_server_vers = -1;
static int hf_dsi_server_uams = -1;
static int hf_dsi_server_icon = -1;
static int hf_dsi_server_directory = -1;
static int hf_dsi_server_flag = -1;
static int hf_dsi_server_flag_copyfile = -1;
static int hf_dsi_server_flag_passwd = -1;
static int hf_dsi_server_flag_no_save_passwd = -1;
static int hf_dsi_server_flag_srv_msg = -1;
static int hf_dsi_server_flag_srv_sig = -1;
static int hf_dsi_server_flag_tcpip = -1;
static int hf_dsi_server_flag_notify = -1;
static int hf_dsi_server_flag_reconnect = -1;
static int hf_dsi_server_flag_directory = -1;
static int hf_dsi_server_flag_utf8_name = -1;
static int hf_dsi_server_flag_uuid = -1;
static int hf_dsi_server_flag_ext_sleep = -1;
static int hf_dsi_server_flag_fast_copy = -1;
static int hf_dsi_server_signature = -1;
static int hf_dsi_server_addr_len = -1;
static int hf_dsi_server_addr_type = -1;
static int hf_dsi_server_addr_value = -1;
static gint ett_dsi_status = -1;
static gint ett_dsi_uams = -1;
static gint ett_dsi_vers = -1;
static gint ett_dsi_addr = -1;
static gint ett_dsi_addr_line = -1;
static gint ett_dsi_directory = -1;
static gint ett_dsi_utf8_name = -1;
static gint ett_dsi_status_server_flag = -1;
static const value_string afp_server_addr_type_vals[] = {
{1, "IP address" },
{2, "IP+port address" },
{3, "DDP address" },
{4, "DNS name" },
{5, "IP+port ssh tunnel" },
{6, "IP6 address" },
{7, "IP6+port address" },
{0, NULL } };
value_string_ext afp_server_addr_type_vals_ext = VALUE_STRING_EXT_INIT(afp_server_addr_type_vals);
/* end status stuff */
/* desegmentation of DSI */
static gboolean dsi_desegment = TRUE;
static dissector_handle_t data_handle;
static dissector_handle_t afp_handle;
#define TCP_PORT_DSI 548
#define DSI_BLOCKSIZ 16
/* DSI flags */
#define DSIFL_REQUEST 0x00
#define DSIFL_REPLY 0x01
#define DSIFL_MAX 0x01
/* DSI Commands */
#define DSIFUNC_CLOSE 1 /* DSICloseSession */
#define DSIFUNC_CMD 2 /* DSICommand */
#define DSIFUNC_STAT 3 /* DSIGetStatus */
#define DSIFUNC_OPEN 4 /* DSIOpenSession */
#define DSIFUNC_TICKLE 5 /* DSITickle */
#define DSIFUNC_WRITE 6 /* DSIWrite */
#define DSIFUNC_ATTN 8 /* DSIAttention */
#define DSIFUNC_MAX 8 /* largest command */
static const value_string flag_vals[] = {
{DSIFL_REQUEST, "Request" },
{DSIFL_REPLY, "Reply" },
{0, NULL } };
static const value_string func_vals[] = {
{DSIFUNC_CLOSE, "CloseSession" },
{DSIFUNC_CMD, "Command" },
{DSIFUNC_STAT, "GetStatus" },
{DSIFUNC_OPEN, "OpenSession" },
{DSIFUNC_TICKLE, "Tickle" },
{DSIFUNC_WRITE, "Write" },
{ 7, "Unknown" },
{DSIFUNC_ATTN, "Attention" },
{0, NULL } };
static value_string_ext func_vals_ext = VALUE_STRING_EXT_INIT(func_vals);
static gint
dissect_dsi_open_session(tvbuff_t *tvb, proto_tree *dsi_tree, gint offset, gint dsi_length)
{
proto_tree *tree;
proto_item *ti;
guint8 type;
guint8 len;
ti = proto_tree_add_text(dsi_tree, tvb, offset, -1, "Open Session");
tree = proto_item_add_subtree(ti, ett_dsi_open);
while( dsi_length >2 ) {
type = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_dsi_open_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
len = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_dsi_open_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
switch (type) {
case 0:
proto_tree_add_item(tree, hf_dsi_open_quantum, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case 1:
proto_tree_add_item(tree, hf_dsi_open_quantum, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case 2:
proto_tree_add_item(tree, hf_dsi_replay_cache_size, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
default:
proto_tree_add_item(tree, hf_dsi_open_option, tvb, offset, len, ENC_NA);
}
dsi_length -= len + 2;
offset += len;
}
return offset;
}
static gint
dissect_dsi_attention(tvbuff_t *tvb, proto_tree *dsi_tree, gint offset)
{
proto_tree *tree;
proto_item *ti;
guint16 flag;
if (!tvb_reported_length_remaining(tvb,offset))
return offset;
flag = tvb_get_ntohs(tvb, offset);
ti = proto_tree_add_text(dsi_tree, tvb, offset, -1, "Attention");
tree = proto_item_add_subtree(ti, ett_dsi_attn);
ti = proto_tree_add_item(tree, hf_dsi_attn_flag, tvb, offset, 2, ENC_BIG_ENDIAN);
tree = proto_item_add_subtree(ti, ett_dsi_attn_flag);
proto_tree_add_item(tree, hf_dsi_attn_flag_shutdown, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_dsi_attn_flag_crash, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_dsi_attn_flag_msg, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_dsi_attn_flag_reconnect, tvb, offset, 2, ENC_BIG_ENDIAN);
/* FIXME */
if ((flag & 0xf000) != 0x3000)
proto_tree_add_item(tree, hf_dsi_attn_flag_time, tvb, offset, 2, ENC_BIG_ENDIAN);
else
proto_tree_add_item(tree, hf_dsi_attn_flag_bitmap, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
return offset;
}
/* -----------------------------
from netatalk/etc/afpd/status.c
*/
static gint
dissect_dsi_reply_get_status(tvbuff_t *tvb, proto_tree *tree, gint offset)
{
proto_tree *sub_tree;
proto_item *ti;
guint16 ofs;
guint16 flag;
guint16 sign_ofs = 0;
guint16 adr_ofs = 0;
guint16 dir_ofs = 0;
guint16 utf_ofs = 0;
guint8 nbe;
guint8 len;
guint8 i;
if (!tree)
return offset;
ti = proto_tree_add_text(tree, tvb, offset, -1, "Get Status");
tree = proto_item_add_subtree(ti, ett_dsi_status);
ofs = tvb_get_ntohs(tvb, offset +AFPSTATUS_MACHOFF);
proto_tree_add_text(tree, tvb, offset +AFPSTATUS_MACHOFF, 2, "Machine offset: %d", ofs);
ofs = tvb_get_ntohs(tvb, offset +AFPSTATUS_VERSOFF);
proto_tree_add_text(tree, tvb, offset +AFPSTATUS_VERSOFF, 2, "Version offset: %d", ofs);
ofs = tvb_get_ntohs(tvb, offset +AFPSTATUS_UAMSOFF);
proto_tree_add_text(tree, tvb, offset +AFPSTATUS_UAMSOFF, 2, "UAMS offset: %d", ofs);
ofs = tvb_get_ntohs(tvb, offset +AFPSTATUS_ICONOFF);
proto_tree_add_text(tree, tvb, offset +AFPSTATUS_ICONOFF, 2, "Icon offset: %d", ofs);
ofs = offset +AFPSTATUS_FLAGOFF;
ti = proto_tree_add_item(tree, hf_dsi_server_flag, tvb, ofs, 2, ENC_BIG_ENDIAN);
sub_tree = proto_item_add_subtree(ti, ett_dsi_status_server_flag);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_copyfile , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_passwd , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_no_save_passwd, tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_srv_msg , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_srv_sig , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_tcpip , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_notify , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_reconnect , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_directory , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_utf8_name , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_uuid , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_ext_sleep , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(sub_tree, hf_dsi_server_flag_fast_copy , tvb, ofs, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_dsi_server_name, tvb, offset +AFPSTATUS_PRELEN, 1, ENC_ASCII|ENC_NA);
flag = tvb_get_ntohs(tvb, ofs);
if ((flag & AFPSRVRINFO_SRVSIGNATURE)) {
ofs = offset +AFPSTATUS_PRELEN +tvb_get_guint8(tvb, offset +AFPSTATUS_PRELEN) +1;
if ((ofs & 1))
ofs++;
sign_ofs = tvb_get_ntohs(tvb, ofs);
proto_tree_add_text(tree, tvb, ofs, 2, "Signature offset: %d", sign_ofs);
sign_ofs += offset;
if ((flag & AFPSRVRINFO_TCPIP)) {
ofs += 2;
adr_ofs = tvb_get_ntohs(tvb, ofs);
proto_tree_add_text(tree, tvb, ofs, 2, "Network address offset: %d", adr_ofs);
adr_ofs += offset;
}
if ((flag & AFPSRVRINFO_SRVDIRECTORY)) {
ofs += 2;
dir_ofs = tvb_get_ntohs(tvb, ofs);
proto_tree_add_text(tree, tvb, ofs, 2, "Directory services offset: %d", dir_ofs);
dir_ofs += offset;
}
if ((flag & AFPSRVRINFO_SRVUTF8)) {
ofs += 2;
utf_ofs = tvb_get_ntohs(tvb, ofs);
proto_tree_add_text(tree, tvb, ofs, 2, "UTF8 server name offset: %d", utf_ofs);
utf_ofs += offset;
}
}
ofs = offset +tvb_get_ntohs(tvb, offset +AFPSTATUS_MACHOFF);
if (ofs)
proto_tree_add_item(tree, hf_dsi_server_type, tvb, ofs, 1, ENC_ASCII|ENC_NA);
ofs = offset +tvb_get_ntohs(tvb, offset +AFPSTATUS_VERSOFF);
if (ofs) {
nbe = tvb_get_guint8(tvb, ofs);
ti = proto_tree_add_text(tree, tvb, ofs, 1, "Version list: %d", nbe);
ofs++;
sub_tree = proto_item_add_subtree(ti, ett_dsi_vers);
for (i = 0; i < nbe; i++) {
len = tvb_get_guint8(tvb, ofs);
proto_tree_add_item(sub_tree, hf_dsi_server_vers, tvb, ofs, 1, ENC_ASCII|ENC_NA);
ofs += len + 1;
}
}
ofs = offset +tvb_get_ntohs(tvb, offset +AFPSTATUS_UAMSOFF);
if (ofs) {
nbe = tvb_get_guint8(tvb, ofs);
ti = proto_tree_add_text(tree, tvb, ofs, 1, "UAMS list: %d", nbe);
ofs++;
sub_tree = proto_item_add_subtree(ti, ett_dsi_uams);
for (i = 0; i < nbe; i++) {
len = tvb_get_guint8(tvb, ofs);
proto_tree_add_item(sub_tree, hf_dsi_server_uams, tvb, ofs, 1, ENC_ASCII|ENC_NA);
ofs += len + 1;
}
}
ofs = offset +tvb_get_ntohs(tvb, offset +AFPSTATUS_ICONOFF);
if (ofs)
proto_tree_add_item(tree, hf_dsi_server_icon, tvb, ofs, 256, ENC_NA);
if (sign_ofs) {
proto_tree_add_item(tree, hf_dsi_server_signature, tvb, sign_ofs, 16, ENC_NA);
}
if (adr_ofs) {
proto_tree *adr_tree;
unsigned char *tmp;
guint16 net;
guint8 node;
guint16 port;
ofs = adr_ofs;
nbe = tvb_get_guint8(tvb, ofs);
ti = proto_tree_add_text(tree, tvb, ofs, 1, "Address list: %d", nbe);
ofs++;
adr_tree = proto_item_add_subtree(ti, ett_dsi_addr);
for (i = 0; i < nbe; i++) {
guint8 type;
len = tvb_get_guint8(tvb, ofs);
type = tvb_get_guint8(tvb, ofs +1);
switch (type) {
case 1: /* IP */
ti = proto_tree_add_text(adr_tree, tvb, ofs, len, "ip: %s", tvb_ip_to_str(tvb, ofs+2));
break;
case 2: /* IP + port */
port = tvb_get_ntohs(tvb, ofs+6);
ti = proto_tree_add_text(adr_tree, tvb, ofs, len, "ip %s:%d", tvb_ip_to_str(tvb, ofs+2), port);
break;
case 3: /* DDP, atalk_addr_to_str want host order not network */
net = tvb_get_ntohs(tvb, ofs+2);
node = tvb_get_guint8(tvb, ofs +4);
port = tvb_get_guint8(tvb, ofs +5);
ti = proto_tree_add_text(adr_tree, tvb, ofs, len, "ddp: %u.%u:%u",
net, node, port);
break;
case 4: /* DNS */
case 5: /* SSH tunnel */
if (len > 2) {
tmp = tvb_get_string(wmem_packet_scope(), tvb, ofs +2, len -2);
ti = proto_tree_add_text(adr_tree, tvb, ofs, len, "%s: %s",
(type==4)?"dns":"ssh tunnel", tmp);
break;
}
else {
ti = proto_tree_add_text(adr_tree, tvb, ofs, len,"Malformed address type %d", type);
}
break;
case 6: /* IP6 */
ti = proto_tree_add_text(adr_tree, tvb, ofs, len, "ip6: %s",
tvb_ip6_to_str(tvb, ofs+2));
break;
case 7: /* IP6 + 2bytes port */
port = tvb_get_ntohs(tvb, ofs+ 2+INET6_ADDRLEN);
ti = proto_tree_add_text(adr_tree, tvb, ofs, len, "ip6 %s:%d",
tvb_ip6_to_str(tvb, ofs+2), port);
break;
default:
ti = proto_tree_add_text(adr_tree, tvb, ofs, len,"Unknown type : %d", type);
break;
}
len -= 2;
sub_tree = proto_item_add_subtree(ti,ett_dsi_addr_line);
proto_tree_add_item(sub_tree, hf_dsi_server_addr_len, tvb, ofs, 1, ENC_BIG_ENDIAN);
ofs++;
proto_tree_add_item(sub_tree, hf_dsi_server_addr_type, tvb, ofs, 1, ENC_BIG_ENDIAN);
ofs++;
proto_tree_add_item(sub_tree, hf_dsi_server_addr_value,tvb, ofs, len, ENC_NA);
ofs += len;
}
}
if (dir_ofs) {
ofs = dir_ofs;
nbe = tvb_get_guint8(tvb, ofs);
ti = proto_tree_add_text(tree, tvb, ofs, 1, "Directory services list: %d", nbe);
ofs++;
sub_tree = proto_item_add_subtree(ti, ett_dsi_directory);
for (i = 0; i < nbe; i++) {
len = tvb_get_guint8(tvb, ofs);
proto_tree_add_item(sub_tree, hf_dsi_server_directory, tvb, ofs, 1, ENC_ASCII|ENC_NA);
ofs += len + 1;
}
}
if (utf_ofs) {
guint16 ulen;
char *tmp;
ofs = utf_ofs;
ulen = tvb_get_ntohs(tvb, ofs);
tmp = tvb_get_string(wmem_packet_scope(), tvb, ofs + 2, ulen);
ti = proto_tree_add_text(tree, tvb, ofs, ulen + 2, "UTF8 server name: %s", tmp);
sub_tree = proto_item_add_subtree(ti, ett_dsi_utf8_name);
proto_tree_add_uint(sub_tree, hf_dsi_utf8_server_name_len, tvb, ofs, 2, ulen);
ofs += 2;
proto_tree_add_string(sub_tree, hf_dsi_utf8_server_name, tvb, ofs, ulen, tmp);
ofs += ulen;
}
return ofs;
}
static void
dissect_dsi_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *dsi_tree;
proto_item *ti;
guint8 dsi_flags,dsi_command;
guint16 dsi_requestid;
gint32 dsi_code;
guint32 dsi_length;
guint32 dsi_reserved;
struct aspinfo aspinfo;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DSI");
col_clear(pinfo->cinfo, COL_INFO);
dsi_flags = tvb_get_guint8(tvb, 0);
dsi_command = tvb_get_guint8(tvb, 1);
dsi_requestid = tvb_get_ntohs(tvb, 2);
dsi_code = tvb_get_ntohl(tvb, 4);
dsi_length = tvb_get_ntohl(tvb, 8);
dsi_reserved = tvb_get_ntohl(tvb, 12);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s (%u)",
val_to_str(dsi_flags, flag_vals,
"Unknown flag (0x%02x)"),
val_to_str_ext(dsi_command, &func_vals_ext,
"Unknown function (0x%02x)"),
dsi_requestid);
if (tree) {
ti = proto_tree_add_item(tree, proto_dsi, tvb, 0, -1, ENC_NA);
dsi_tree = proto_item_add_subtree(ti, ett_dsi);
proto_tree_add_uint(dsi_tree, hf_dsi_flags, tvb,
0, 1, dsi_flags);
proto_tree_add_uint(dsi_tree, hf_dsi_command, tvb,
1, 1, dsi_command);
proto_tree_add_uint(dsi_tree, hf_dsi_requestid, tvb,
2, 2, dsi_requestid);
switch (dsi_flags) {
case DSIFL_REQUEST:
proto_tree_add_int(dsi_tree, hf_dsi_offset, tvb,
4, 4, dsi_code);
break;
case DSIFL_REPLY:
proto_tree_add_int(dsi_tree, hf_dsi_error, tvb,
4, 4, dsi_code);
break;
}
proto_tree_add_uint_format_value(dsi_tree, hf_dsi_length, tvb,
8, 4, dsi_length,
"%u bytes", dsi_length);
proto_tree_add_uint(dsi_tree, hf_dsi_reserved, tvb,
12, 4, dsi_reserved);
}
else
dsi_tree = tree;
switch (dsi_command) {
case DSIFUNC_OPEN:
if (tree) {
dissect_dsi_open_session(tvb, dsi_tree, DSI_BLOCKSIZ, dsi_length);
}
break;
case DSIFUNC_ATTN:
if (tree) {
dissect_dsi_attention(tvb, dsi_tree, DSI_BLOCKSIZ);
}
break;
case DSIFUNC_STAT:
if (tree && (dsi_flags == DSIFL_REPLY)) {
dissect_dsi_reply_get_status(tvb, dsi_tree, DSI_BLOCKSIZ);
}
break;
case DSIFUNC_CMD:
case DSIFUNC_WRITE:
{
tvbuff_t *new_tvb;
void* pd_save;
int len = tvb_reported_length_remaining(tvb,DSI_BLOCKSIZ);
aspinfo.reply = (dsi_flags == DSIFL_REPLY);
aspinfo.command = dsi_command;
aspinfo.seq = dsi_requestid;
aspinfo.code = dsi_code;
pd_save = pinfo->private_data;
pinfo->private_data = &aspinfo;
proto_item_set_len(dsi_tree, DSI_BLOCKSIZ);
new_tvb = tvb_new_subset(tvb, DSI_BLOCKSIZ,-1,len);
call_dissector(afp_handle, new_tvb, pinfo, tree);
pinfo->private_data = pd_save;
}
break;
default:
if (tree) {
call_dissector(data_handle,
tvb_new_subset_remaining(tvb, DSI_BLOCKSIZ),
pinfo, dsi_tree);
}
break;
}
}
static guint
get_dsi_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
guint32 plen;
guint8 dsi_flags,dsi_command;
dsi_flags = tvb_get_guint8(tvb, offset);
dsi_command = tvb_get_guint8(tvb, offset+ 1);
if ( dsi_flags > DSIFL_MAX || !dsi_command || dsi_command > DSIFUNC_MAX)
{
/* it's not a known dsi pdu start sequence */
return tvb_length_remaining(tvb, offset);
}
/*
* Get the length of the DSI packet.
*/
plen = tvb_get_ntohl(tvb, offset+8);
/*
* That length doesn't include the length of the header itself;
* add that in.
*/
return plen + 16;
}
static void
dissect_dsi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
tcp_dissect_pdus(tvb, pinfo, tree, dsi_desegment, 12,
get_dsi_pdu_len, dissect_dsi_packet);
}
void
proto_register_dsi(void)
{
static hf_register_info hf[] = {
{ &hf_dsi_flags,
{ "Flags", "dsi.flags",
FT_UINT8, BASE_HEX, VALS(flag_vals), 0x0,
"Indicates request or reply.", HFILL }},
{ &hf_dsi_command,
{ "Command", "dsi.command",
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &func_vals_ext, 0x0,
"Represents a DSI command.", HFILL }},
{ &hf_dsi_requestid,
{ "Request ID", "dsi.requestid",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Keeps track of which request this is. Replies must match a Request. IDs must be generated in sequential order.", HFILL }},
{ &hf_dsi_offset,
{ "Data offset", "dsi.data_offset",
FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_error,
{ "Error code", "dsi.error_code",
FT_INT32, BASE_DEC|BASE_EXT_STRING, &asp_error_vals_ext, 0x0,
NULL, HFILL }},
{ &hf_dsi_length,
{ "Length", "dsi.length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Total length of the data that follows the DSI header.", HFILL }},
{ &hf_dsi_reserved,
{ "Reserved", "dsi.reserved",
FT_UINT32, BASE_HEX, NULL, 0x0,
"Reserved for future use. Should be set to zero.", HFILL }},
/* asp , afp */
{ &hf_dsi_utf8_server_name_len,
{ "Length", "dsi.utf8_server_name_len",
FT_UINT16, BASE_DEC, NULL, 0x0,
"UTF8 server name length.", HFILL }},
{ &hf_dsi_utf8_server_name,
{ "UTF8 Server name", "dsi.utf8_server_name",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_server_name,
{ "Server name", "dsi.server_name",
FT_UINT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_server_type,
{ "Server type", "dsi.server_type",
FT_UINT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_server_vers,
{ "AFP version", "dsi.server_vers",
FT_UINT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_server_uams,
{ "UAM", "dsi.server_uams",
FT_UINT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_server_icon,
{ "Icon bitmap", "dsi.server_icon",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Server icon bitmap", HFILL }},
{ &hf_dsi_server_directory,
{ "Directory service", "dsi.server_directory",
FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"Server directory service", HFILL }},
{ &hf_dsi_server_signature,
{ "Server signature", "dsi.server_signature",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_dsi_server_flag,
{ "Flag", "dsi.server_flag",
FT_UINT16, BASE_HEX, NULL, 0x0,
"Server capabilities flag", HFILL }},
{ &hf_dsi_server_flag_copyfile,
{ "Support copyfile", "dsi.server_flag.copyfile",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_COPY,
"Server support copyfile", HFILL }},
{ &hf_dsi_server_flag_passwd,
{ "Support change password", "dsi.server_flag.passwd",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_PASSWD,
"Server support change password", HFILL }},
{ &hf_dsi_server_flag_no_save_passwd,
{ "Don't allow save password", "dsi.server_flag.no_save_passwd",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_NOSAVEPASSWD,
NULL, HFILL }},
{ &hf_dsi_server_flag_srv_msg,
{ "Support server message", "dsi.server_flag.srv_msg",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_SRVMSGS,
NULL, HFILL }},
{ &hf_dsi_server_flag_srv_sig,
{ "Support server signature", "dsi.server_flag.srv_sig",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_SRVSIGNATURE,
NULL, HFILL }},
{ &hf_dsi_server_flag_tcpip,
{ "Support TCP/IP", "dsi.server_flag.tcpip",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_TCPIP,
"Server support TCP/IP", HFILL }},
{ &hf_dsi_server_flag_notify,
{ "Support server notifications", "dsi.server_flag.notify",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_SRVNOTIFY,
"Server support notifications", HFILL }},
{ &hf_dsi_server_flag_reconnect,
{ "Support server reconnect", "dsi.server_flag.reconnect",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_SRVRECONNECT,
"Server support reconnect", HFILL }},
{ &hf_dsi_server_flag_directory,
{ "Support directory services", "dsi.server_flag.directory",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_SRVDIRECTORY,
"Server support directory services", HFILL }},
{ &hf_dsi_server_flag_utf8_name,
{ "Support UTF8 server name", "dsi.server_flag.utf8_name",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_SRVUTF8,
"Server support UTF8 server name", HFILL }},
{ &hf_dsi_server_flag_uuid,
{ "Support UUIDs", "dsi.server_flag.uuids",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_UUID,
"Server supports UUIDs", HFILL }},
{ &hf_dsi_server_flag_ext_sleep,
{ "Support extended sleep", "dsi.server_flag.ext_sleep",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_EXT_SLEEP,
"Server supports extended sleep", HFILL }},
{ &hf_dsi_server_flag_fast_copy,
{ "Support fast copy", "dsi.server_flag.fast_copy",
FT_BOOLEAN, 16, NULL, AFPSRVRINFO_FASTBOZO,
"Server support fast copy", HFILL }},
{ &hf_dsi_server_addr_len,
{ "Length", "dsi.server_addr.len",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Address length.", HFILL }},
{ &hf_dsi_server_addr_type,
{ "Type", "dsi.server_addr.type",
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &afp_server_addr_type_vals_ext, 0x0,
"Address type.", HFILL }},
{ &hf_dsi_server_addr_value,
{ "Value", "dsi.server_addr.value",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Address value", HFILL }},
{ &hf_dsi_open_type,
{ "Option", "dsi.open_type",
FT_UINT8, BASE_DEC, VALS(dsi_open_type_vals), 0x0,
"Open session option type.", HFILL }},
{ &hf_dsi_open_len,
{ "Length", "dsi.open_len",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Open session option len", HFILL }},
{ &hf_dsi_open_quantum,
{ "Quantum", "dsi.open_quantum",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Server/Attention quantum", HFILL }},
{ &hf_dsi_replay_cache_size,
{ "Replay", "dsi.replay_cache",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Replay cache size", HFILL }},
{ &hf_dsi_open_option,
{ "Option", "dsi.open_option",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Open session options (undecoded)", HFILL }},
{ &hf_dsi_attn_flag,
{ "Flags", "dsi.attn_flag",
FT_UINT16, BASE_HEX|BASE_EXT_STRING, &dsi_attn_flag_vals_ext, 0xf000,
"Server attention flag", HFILL }},
{ &hf_dsi_attn_flag_shutdown,
{ "Shutdown", "dsi.attn_flag.shutdown",
FT_BOOLEAN, 16, NULL, 1<<15,
"Attention flag, server is shutting down", HFILL }},
{ &hf_dsi_attn_flag_crash,
{ "Crash", "dsi.attn_flag.crash",
FT_BOOLEAN, 16, NULL, 1<<14,
"Attention flag, server crash bit", HFILL }},
{ &hf_dsi_attn_flag_msg,
{ "Message", "dsi.attn_flag.msg",
FT_BOOLEAN, 16, NULL, 1<<13,
"Attention flag, server message bit", HFILL }},
{ &hf_dsi_attn_flag_reconnect,
{ "Don't reconnect", "dsi.attn_flag.reconnect",
FT_BOOLEAN, 16, NULL, 1<<12,
"Attention flag, don't reconnect bit", HFILL }},
{ &hf_dsi_attn_flag_time,
{ "Minutes", "dsi.attn_flag.time",
FT_UINT16, BASE_DEC, NULL, 0xfff,
"Number of minutes", HFILL }},
{ &hf_dsi_attn_flag_bitmap,
{ "Bitmap", "dsi.attn_flag.bitmap",
FT_UINT16, BASE_HEX, NULL, 0xfff,
"Attention extended bitmap", HFILL }},
};
static gint *ett[] = {
&ett_dsi,
&ett_dsi_open,
&ett_dsi_attn,
&ett_dsi_attn_flag,
/* asp afp */
&ett_dsi_status,
&ett_dsi_status_server_flag,
&ett_dsi_vers,
&ett_dsi_uams,
&ett_dsi_addr,
&ett_dsi_addr_line,
&ett_dsi_directory,
&ett_dsi_utf8_name,
};
module_t *dsi_module;
proto_dsi = proto_register_protocol("Data Stream Interface", "DSI", "dsi");
proto_register_field_array(proto_dsi, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
dsi_module = prefs_register_protocol(proto_dsi, NULL);
prefs_register_bool_preference(dsi_module, "desegment",
"Reassemble DSI messages spanning multiple TCP segments",
"Whether the DSI dissector should reassemble messages spanning multiple TCP segments."
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
&dsi_desegment);
}
void
proto_reg_handoff_dsi(void)
{
dissector_handle_t dsi_handle;
dsi_handle = create_dissector_handle(dissect_dsi, proto_dsi);
dissector_add_uint("tcp.port", TCP_PORT_DSI, dsi_handle);
data_handle = find_dissector("data");
afp_handle = find_dissector("afp");
}
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