summaryrefslogtreecommitdiff
path: root/source4/build/pidl/eparser.pm
blob: 102e05e29d600293b61fdc963c618a1859de9521 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
###################################################
# parser generator for IDL structures
# Copyright tpot@samba.org 2001
# Copyright tridge@samba.org 2000
# released under the GNU GPL

package IdlEParser;

use strict;
use dump;

my($name);

#####################################################################
# handlers for parsing ndr argument types

sub ParamSimpleNdrType($)
{
    my($p) = shift;
    my($res);

    $res .= "\toffset = dissect_ndr_$p->{TYPE}(tvb, offset, pinfo, tree, drep, hf_$p->{NAME}_$p->{TYPE}, NULL);\n";

    return $res;
}

sub ParamPolicyHandle($)
{
    my($p) = shift;
    my($res);

    $res .= "\toffset = dissect_nt_policy_hnd(tvb, offset, pinfo, tree, drep, hf_policy_handle, NULL, NULL, FALSE, FALSE);\n";

    return $res;
}

sub ParamString($)
{
    my($p) = shift;
    my($res);

    $res .= "\toffset = dissect_ndr_pointer_cb(tvb, offset, pinfo, tree, drep, dissect_ndr_wchar_cvstring, NDR_POINTER_UNIQUE, \"$p->{NAME}\", hf_$p->{NAME}_string, cb_wstr_postprocess, GINT_TO_POINTER(1));\n";

    return $res;
}

my %param_handlers = (
		      'uint16' => \&ParamSimpleNdrType,
		      'uint32' => \&ParamSimpleNdrType,
		      'policy_handle' => \&ParamPolicyHandle,
		      'string' => \&ParamString,
		      );

#####################################################################
# parse a function
sub ParseParameter($)
{ 
    my($p) = shift;
    my($res);

    if (defined($param_handlers{$p->{TYPE}})) {
	$res .= &{$param_handlers{$p->{TYPE}}}($p);
	return $res;
    }

    $res .= "\t/* Unhandled IDL type '$p->{TYPE}' in $p->{PARENT}->{NAME} */\n";

    return $res;
    # exit(1);
}

#####################################################################
# parse a function
sub ParseFunction($)
{ 
    my($f) = shift;
    my($res);

    $res .= "/*\n\n";
    $res .= IdlDump::DumpFunction($f);
    $res .= "*/\n\n";

    # Request function

    $res .= "static int\n";
    $res .= "$f->{NAME}_rqst(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, guint8 *drep)\n";
    $res .= "{\n";

    my($d);
    foreach $d (@{$f->{DATA}}) {
	$res .= ParseParameter($d), if defined($d->{PROPERTIES}{in});
    }

    $res .= "\n\treturn offset;\n";
    $res .= "}\n\n";

    # Response function

    $res .= "static int\n";
    $res .= "$f->{NAME}_resp(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, guint8 *drep)\n";
    $res .= "{\n";

    foreach $d (@{$f->{DATA}}) {
	$res .= ParseParameter($d), if defined($d->{PROPERTIES}{out});
    }

    $res .= "\n\toffset = dissect_ntstatus(tvb, offset, pinfo, tree, drep, hf_rc, NULL);\n\n";

    $res .= "\treturn offset;\n";
    $res .= "}\n\n";

    return $res;
}

#####################################################################
# parse the interface definitions
sub Pass2Interface($)
{
    my($interface) = shift;
    my($data) = $interface->{DATA};
    my($res) = "";

    foreach my $d (@{$data}) {
	$res .= ParseFunction($d), if $d->{TYPE} eq "FUNCTION";
    }

    return $res;
}

#####################################################################
# Pass 1: Stuff required before structs and functions

my %hf_info = ();		# Field info - remember for trailing stuff

sub Pass1ModuleHeader($)
{
    my($d) = shift;
    my($res) = "";

    $res .= << "EOF";
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "packet-dcerpc.h"
#include "packet-dcerpc-nt.h"

extern const value_string NT_errors[];

EOF

    # UUID

    if ($d->{TYPE} eq "MODULEHEADER" and defined($d->{PROPERTIES}->{uuid})) {
	my $uuid = $d->{PROPERTIES}->{uuid};
	$res .= "static e_uuid_t uuid_dcerpc_$name = {\n";
	$res .= "\t0x" . substr($uuid, 0, 8);
	$res .= ", 0x" . substr($uuid, 9, 4);
	$res .= ", 0x" . substr($uuid, 14, 4) . ",\n";
	$res .= "\t{ 0x" . substr($uuid, 19, 2);
	$res .= ", 0x" . substr($uuid, 21, 2);
	$res .= ", 0x" . substr($uuid, 24, 2);
	$res .= ", 0x" . substr($uuid, 26, 2);
	$res .= ", 0x" . substr($uuid, 28, 2);
	$res .= ", 0x" . substr($uuid, 30, 2);
	$res .= ", 0x" . substr($uuid, 32, 2);
	$res .= ", 0x" . substr($uuid, 34, 2) . " }\n";
	$res .= "};\n\n";
	
	$res .= "static guint16 ver_dcerpc_samr = " . 
	    $d->{PROPERTIES}->{version} . ";\n\n";
    }

    return $res;
}

# Convert an idl type to an ethereal FT_* type

sub type2ft($)
{
    my($t) = shift;

    return "FT_UINT32", if ($t eq "uint32");
    return "FT_UINT16", if ($t eq "uint16");
    
    return "FT_BYTES";
}

# Select an ethereal BASE_* type for an idl type

sub type2base($)
{
    my($t) = shift;

    return "BASE_DEC", if ($t eq "uint32") or ($t eq "uint16");

    return "BASE_NONE";
}

sub Pass1Interface($)
{
    my($interface) = shift;
    my($res) = "";

    $res .= << "EOF";
static int proto_dcerpc_$name = -1;

static int hf_opnum = -1;
static int hf_rc = -1;
static int hf_policy_handle = -1;

static gint ett_dcerpc_$name = -1;

EOF

    foreach my $fn (@{$interface->{DATA}}) {
	next, if $fn->{TYPE} ne "FUNCTION";
	foreach my $args ($fn->{DATA}) {
	    foreach my $params (@{$args}) {

		my $hf_name = "$params->{NAME}_$params->{TYPE}";
		next, if defined $hf_info{$hf_name};

		# Make a note about new field

		$res .= "static int hf_$hf_name = -1;\n";
		$hf_info{$hf_name} = {
		    'ft' => type2ft($params->{TYPE}),
		    'base' => type2base($params->{TYPE})
		    };
	    }
	}
    }

    $res .= "\n";

    return $res;
}

#####################################################################
# Pass 3: trailing stuff

sub Pass3Interface($)
{
    my($interface) = shift;
    my($res) = "";

    $res .= "static dcerpc_sub_dissector dcerpc_${name}_dissectors[] = {\n";

    my $num = 0;

    foreach my $d (@{$interface->{DATA}}) {
	if ($d->{TYPE} eq "FUNCTION") {
	    # Strip module name from function name, if present
	    my $n = $d->{NAME};
	    $n = substr($d->{NAME}, length($name) + 1),
 	        if $name eq substr($d->{NAME}, 0, length($name));

	    $res .= "\t{ $num, \"$n\",\n";
	    $res .= "\t\t$d->{NAME}_rqst,\n";
	    $res .= "\t\t$d->{NAME}_resp },\n";
	    $num++;
	}
    }

    $res .= "};\n\n";

    return $res;
}

#####################################################################
# parse a parsed IDL structure back into an IDL file
sub Parse($)
{
    my($idl) = shift;
    my($res) = "/* parser auto-generated by pidl */\n\n";
    my($d);

    # Pass 0: set module name

    foreach $d (@{$idl}) {
	$name = $d->{NAME}, if ($d->{TYPE} eq "INTERFACE");
    }

    # Pass 1: header stuff

    foreach $d (@{$idl}) {
	$res .= Pass1ModuleHeader($d), if $d->{TYPE} eq "MODULEHEADER";
	$res .= Pass1Interface($d), if $d->{TYPE} eq "INTERFACE";
    }

    # Pass 2: typedefs and functions

    foreach $d (@{$idl}) {
	$res .= Pass2Interface($d), if $d->{TYPE} eq "INTERFACE";
    }

    # Pass 3: trailing stuff

    foreach $d (@{$idl}) {
	$res .= Pass3Interface($d), if $d->{TYPE} eq "INTERFACE";
    }

    my $hf_register_info = << "EOF";
\t{ &hf_opnum,
\t  { \"Operation\", \"$name.opnum\", FT_UINT16, BASE_DEC, NULL, 0x0, \"Operation\", HFILL }},
\t{ &hf_policy_handle,
\t  { \"Policy handle\", \"$name.policy\", FT_BYTES, BASE_NONE, NULL, 0x0, \"Policy handle\", HFILL }},
\t{ &hf_rc,
\t  { \"Return code\", \"$name.rc\", FT_UINT32, BASE_HEX, VALS(NT_errors), 0x0, \"Return status code\", HFILL }},
EOF

    foreach my $hf (keys(%hf_info)) {
	$hf_register_info .= "\t{ &hf_$hf,\n";
	$hf_register_info .= "\t  { \"$hf\", \"$hf\", $hf_info{$hf}{ft}, $hf_info{$hf}{base},\n";
	$hf_register_info .= "\t  NULL, 0, \"$hf\", HFILL }},\n";
    }
    
    my $ett_info = "/* spotty */";
    
    $res .= << "EOF";
void
proto_register_dcerpc_${name}(void)
{
        static hf_register_info hf[] = {
$hf_register_info
        };

        static gint *ett[] = {
                &ett_dcerpc_$name,
$ett_info
        };

        proto_dcerpc_$name = proto_register_protocol("$name", "$name", "$name");

        proto_register_field_array (proto_dcerpc_${name}, hf, array_length (hf));
        proto_register_subtree_array(ett, array_length(ett));

}

void
proto_reg_handoff_dcerpc_$name(void)
{
        dcerpc_init_uuid(proto_dcerpc_$name, ett_dcerpc_$name, 
			 &uuid_dcerpc_$name, ver_dcerpc_$name, 
			 dcerpc_${name}_dissectors, hf_opnum);
}
EOF

    return $res;
}

1;