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###################################################
# 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;
use Data::Dumper;
my($name);
sub ParamSimpleNdrType($)
{
my($p) = shift;
my($res);
$res .= "\toffset = dissect_ndr_$p->{TYPE}(tvb, offset, pinfo, tree, drep, hf_$p->{NAME}, NULL);\n";
return $res;
}
sub ParamPolicyHandle($)
{
my($p) = shift;
my($res);
$res .= "\toffset = dissect_nt_policy_hnd(tvb, offset, pinfo, tree, drep, hf_policy_hnd, NULL, NULL, FALSE, FALSE);\n";
return $res;
}
my %param_handlers = (
'uint16' => \&ParamSimpleNdrType,
'uint32' => \&ParamSimpleNdrType,
'policy_handle' => \&ParamPolicyHandle,
);
#####################################################################
# parse a function
sub ParseParameter($)
{
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 .= "\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";
$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 $res;
}
#####################################################################
# Pass 1: Stuff required before structs and functions
sub Pass1ModuleHeader($)
{
my($d) = shift;
my($res) = "";
$res .= << "EOF";
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "packet-dcerpc.h"
#include "packet-dcerpc-nt.h"
EOF
# UUID
if ($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 $res;
}
sub Pass1Interface($)
{
my($interface) = shift;
my($res) = "";
$res .= << "EOF";
static int proto_dcerpc_$name = -1;
static int hf_${name}_opnum = -1;
static int hf_${name}_rc = -1;
static int hf_policy_hnd = -1;
static gint ett_dcerpc_$name = -1;
EOF
my %p = ();
foreach my $fn (@{$interface->{DATA}}) {
next, if $fn->{TYPE} ne "FUNCTION";
foreach my $args ($fn->{DATA}) {
foreach my $params (@{$args}) {
$res .= "static int hf_$params->{NAME} = -1;\n",
if not defined $p{$params->{NAME}};
$p{$params->{NAME}} = 1;
}
}
}
$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";
}
$res .= << "EOF";
void
proto_reg_handoff_dcerpc_$name(void)
{
dcerpc_init_uuid(proto_dcerpc_$name, ett_dcerpc_$name,
&uuid_dcerpc_$name, ver_dcerpc_$name,
dcerpc_${name}_dissectors, hf_${name}_opnum);
}
EOF
return $res;
}
1;
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