aboutsummaryrefslogtreecommitdiffstats
path: root/tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm
diff options
context:
space:
mode:
Diffstat (limited to 'tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm')
-rw-r--r--tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm228
1 files changed, 127 insertions, 101 deletions
diff --git a/tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm b/tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm
index 32a83b7af4..dd05851c12 100644
--- a/tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm
+++ b/tools/pidl/lib/Parse/Pidl/Wireshark/NDR.pm
@@ -57,12 +57,13 @@ sub StripPrefixes($$)
sub field2name($)
{
- my($field) = shift;
+ my($field) = shift;
- $field =~ s/_/ /g; # Replace underscores with spaces
- $field =~ s/(\w+)/\u\L$1/g; # Capitalise each word
-
- return $field;
+ $field =~ s/^(_)*//g; # Remove any starting underscores
+ $field =~ s/_/ /g; # Replace underscores with spaces
+ $field =~ s/(\w+)/\u\L$1/g; # Capitalise each word
+
+ return $field;
}
sub new($)
@@ -91,7 +92,7 @@ sub pidl_code($$)
{
my ($self, $d) = @_;
return if (defined($self->{cur_fn}) and defined($self->{conformance}->{manual}->{$self->{cur_fn}}));
-
+
if ($d) {
$self->{res}->{code} .= $self->{tabs};
$self->{res}->{code} .= $d;
@@ -143,17 +144,17 @@ sub Enum($$$$)
return if (defined($self->{conformance}->{noemit}->{StripPrefixes($name, $self->{conformance}->{strip_prefixes})}));
- foreach (@{$e->{ELEMENTS}}) {
+ foreach (@{$e->{ELEMENTS}}) {
if (/([^=]*)=(.*)/) {
$self->pidl_hdr("#define $1 ($2)");
}
}
-
+
$self->pidl_hdr("extern const value_string $valsstring\[];");
- $self->pidl_hdr("int $dissectorname(tvbuff_t *tvb _U_, int offset _U_, packet_info *pinfo _U_, proto_tree *tree _U_, dcerpc_info* di _U_, guint8 *drep _U_, int hf_index _U_, guint32 *param _U_);");
+ $self->pidl_hdr("int $dissectorname(tvbuff_t *tvb _U_, int offset _U_, packet_info *pinfo _U_, proto_tree *tree _U_, dcerpc_info* di _U_, guint8 *drep _U_, int hf_index _U_, g$e->{BASE_TYPE} *param _U_);");
$self->pidl_def("const value_string ".$valsstring."[] = {");
- foreach (@{$e->{ELEMENTS}}) {
+ foreach (@{$e->{ELEMENTS}}) {
next unless (/([^=]*)=(.*)/);
$self->pidl_def("\t{ $1, \"$1\" },");
}
@@ -163,7 +164,7 @@ sub Enum($$$$)
$self->pidl_fn_start($dissectorname);
$self->pidl_code("int");
- $self->pidl_code("$dissectorname(tvbuff_t *tvb _U_, int offset _U_, packet_info *pinfo _U_, proto_tree *tree _U_, dcerpc_info* di _U_, guint8 *drep _U_, int hf_index _U_, guint32 *param _U_)");
+ $self->pidl_code("$dissectorname(tvbuff_t *tvb _U_, int offset _U_, packet_info *pinfo _U_, proto_tree *tree _U_, dcerpc_info* di _U_, guint8 *drep _U_, int hf_index _U_, g$e->{BASE_TYPE} *param _U_)");
$self->pidl_code("{");
$self->indent;
$self->pidl_code("g$e->{BASE_TYPE} parameter=0;");
@@ -205,7 +206,7 @@ sub Bitmap($$$$)
$self->pidl_code("proto_item *item = NULL;");
$self->pidl_code("proto_tree *tree = NULL;");
$self->pidl_code("");
-
+
$self->pidl_code("g$e->{BASE_TYPE} flags;");
if ($e->{ALIGN} > 1) {
$self->pidl_code("ALIGN_TO_$e->{ALIGN}_BYTES;");
@@ -246,7 +247,7 @@ sub Bitmap($$$$)
$self->pidl_def(" \"$en is NOT SET\",");
}
$self->pidl_def("};");
-
+
$self->pidl_code("proto_tree_add_boolean(tree, $hf_bitname, tvb, offset-$e->{ALIGN}, $e->{ALIGN}, flags);");
$self->pidl_code("if (flags&$ev){");
$self->pidl_code("\tproto_item_append_text(item, \"$en\");");
@@ -340,10 +341,10 @@ sub ElementLevel($$$$$$$$)
if ($self->{conformance}->{imports}->{$l->{DATA_TYPE}}) {
$call = $self->{conformance}->{imports}->{$l->{DATA_TYPE}}->{DATA};
$self->{conformance}->{imports}->{$l->{DATA_TYPE}}->{USED} = 1;
- } elsif (defined($self->{conformance}->{imports}->{"$pn.$e->{NAME}"})) {
- $call = $self->{conformance}->{imports}->{"$pn.$e->{NAME}"}->{DATA};
+ } elsif (defined($self->{conformance}->{imports}->{"$pn.$e->{NAME}"})) {
+ $call = $self->{conformance}->{imports}->{"$pn.$e->{NAME}"}->{DATA};
$self->{conformance}->{imports}->{"$pn.$e->{NAME}"}->{USED} = 1;
-
+
} elsif (defined($self->{conformance}->{types}->{$l->{DATA_TYPE}})) {
$call= $self->{conformance}->{types}->{$l->{DATA_TYPE}}->{DISSECTOR_NAME};
$self->{conformance}->{types}->{$l->{DATA_TYPE}}->{USED} = 1;
@@ -381,13 +382,13 @@ sub ElementLevel($$$$$$$$)
# continue to dissect handmarshalled stuff with pidl
$self->pidl_code("di->call_data->flags &= ~DCERPC_IS_NDR64;");
- $self->pidl_code("subtvb = tvb_new_subset(tvb, offset, size, -1);");
+ $self->pidl_code("subtvb = tvb_new_subset(tvb, offset, (const gint)size, -1);");
if ($param ne 0) {
- $self->pidl_code("$myname\_(subtvb, 0, pinfo, tree, drep, $param);");
+ $self->pidl_code("$myname\_(subtvb, 0, pinfo, tree, di, drep, $param);");
} else {
- $self->pidl_code("$myname\_(subtvb, 0, pinfo, tree, drep);");
+ $self->pidl_code("$myname\_(subtvb, 0, pinfo, tree, di, drep);");
}
- $self->pidl_code("offset += size;");
+ $self->pidl_code("offset += (int)size;");
$self->pidl_code("di->call_data->flags = saved_flags;");
$self->deindent;
$self->pidl_code("}");
@@ -396,9 +397,9 @@ sub ElementLevel($$$$$$$$)
}
}
-sub Element($$$$$)
+sub Element($$$$$$)
{
- my ($self,$e,$pn,$ifname,$isoruseswitch) = @_;
+ my ($self,$e,$pn,$ifname,$isoruseswitch,%switchvars) = @_;
my $dissectorname = "$ifname\_dissect\_element\_".StripPrefixes($pn, $self->{conformance}->{strip_prefixes})."\_".StripPrefixes($e->{NAME}, $self->{conformance}->{strip_prefixes});
@@ -413,11 +414,30 @@ sub Element($$$$$)
if ($switch_dt->{DATA}->{TYPE} eq "ENUM") {
$switch_type = "g".Parse::Pidl::Typelist::enum_type_fn($switch_dt->{DATA});
} elsif ($switch_dt->{DATA}->{TYPE} eq "SCALAR") {
- $switch_type = "g$e->{SWITCH_TYPE}";
+ $switch_type = "g$type";
+ }
+
+ if ($switch_type ne "") {
+ $moreparam = ", $switch_type *".$name;
+
+ if (($e->{PROPERTIES}->{switch_is} eq "") && ($switchvars{$name}) &&
+ #not a "native" type
+ (!($type =~ /^uint(8|16|1632|32|3264|64)/))) {
+ $param = $name;
+ } elsif ( $switch_dt->{DATA}->{TYPE} eq "ENUM") {
+ $param = $name;
+ } else {
+ $param = "*".$name;
+ }
+ } else {
+ $moreparam = "";
+ }
+
+ if ($name ne "") {
+ $call_code = "offset = $dissectorname(tvb, offset, pinfo, tree, di, drep, &$name);";
+ } else {
+ $call_code = "offset = $dissectorname(tvb, offset, pinfo, tree, di, drep);";
}
- $moreparam = ", $switch_type *".$name;
- $param = $name;
- $call_code = "offset = $dissectorname(tvb, offset, pinfo, tree, di, drep, &$name);";
} else {
$moreparam = "";
$call_code = "offset = $dissectorname(tvb, offset, pinfo, tree, di, drep);";
@@ -459,7 +479,9 @@ sub Element($$$$$)
foreach (@{$e->{LEVELS}}) {
if (defined $_->{SWITCH_IS}) {
$oldparam = $param;
- $param = "*$param";
+ if (($param ne "0") && (!($param =~ /\*/))) {
+ $param = "*$param";
+ }
}
next if ($_->{TYPE} eq "SWITCH");
$self->pidl_def("static int $dissectorname$add(tvbuff_t *tvb _U_, int offset _U_, packet_info *pinfo _U_, proto_tree *tree _U_, dcerpc_info* di _U_, guint8 *drep _U_$moreparam);");
@@ -493,7 +515,7 @@ sub Function($$$)
my %dissectornames;
foreach (@{$fn->{ELEMENTS}}) {
- $dissectornames{$_->{NAME}} = $self->Element($_, $fn->{NAME}, $ifname, undef) if not defined($dissectornames{$_->{NAME}});
+ $dissectornames{$_->{NAME}} = $self->Element($_, $fn->{NAME}, $ifname, undef, undef) if not defined($dissectornames{$_->{NAME}});
}
my $fn_name = $_->{NAME};
@@ -515,7 +537,7 @@ sub Function($$$)
} elsif ($type->{DATA}->{TYPE} eq "SCALAR") {
$self->pidl_code("g$fn->{RETURN_TYPE} status;\n");
} else {
- error($fn, "return type `$fn->{RETURN_TYPE}' not yet supported");
+ error($fn, "return type `$fn->{RETURN_TYPE}' not yet supported");
}
} else {
error($fn, "unknown return type `$fn->{RETURN_TYPE}'");
@@ -540,7 +562,7 @@ sub Function($$$)
$self->pidl_code("offset = dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep, hf\_$ifname\_werror, &status);\n");
$self->pidl_code("if (status != 0)");
$self->pidl_code("\tcol_append_fstr(pinfo->cinfo, COL_INFO, \", Error: %s\", val_to_str(status, WERR_errors, \"Unknown DOS error 0x%08x\"));\n");
-
+
$return_types{$ifname}->{"werror"} = ["WERROR", "Windows Error"];
} elsif (my $type = getType($fn->{RETURN_TYPE})) {
if ($type->{DATA}->{TYPE} eq "ENUM") {
@@ -597,9 +619,11 @@ sub Struct($$$$)
my $varswitchs = {};
# will contain the switch var declaration;
my $vars = [];
+ my %switch_hash;
foreach (@{$e->{ELEMENTS}}) {
if (has_property($_, "switch_is")) {
$varswitchs->{$_->{PROPERTIES}->{switch_is}} = [];
+ $switch_hash{ $_->{PROPERTIES}->{switch_is}} = $_->{PROPERTIES}->{switch_is};
}
}
foreach (@{$e->{ELEMENTS}}) {
@@ -613,10 +637,12 @@ sub Struct($$$$)
if ($switch_dt->{DATA}->{TYPE} eq "ENUM") {
$switch_type = "g".Parse::Pidl::Typelist::enum_type_fn($switch_dt->{DATA});
} elsif ($switch_dt->{DATA}->{TYPE} eq "SCALAR") {
- $switch_type = "g$e->{SWITCH_TYPE}";
+ $switch_type = "g$_->{TYPE}";
}
- push @$vars, "$switch_type $v;";
+ if ($switch_type ne "") {
+ push @$vars, "$switch_type $v;";
+ }
$switch_info = [ $_->{TYPE}, $v ];
$varswitchs->{$v} = $switch_info;
}
@@ -626,7 +652,7 @@ sub Struct($$$$)
$switch_info = $varswitchs->{$varswitch};
}
- $res.="\t".$self->Element($_, $name, $ifname, $switch_info)."\n\n";
+ $res.="\t".$self->Element($_, $name, $ifname, $switch_info, %switch_hash)."\n\n";
}
$self->pidl_hdr("int $dissectorname(tvbuff_t *tvb _U_, int offset _U_, packet_info *pinfo _U_, proto_tree *parent_tree _U_, dcerpc_info* di _U_, guint8 *drep _U_, int hf_index _U_, guint32 param _U_);");
@@ -690,7 +716,7 @@ sub Union($$$$)
foreach (@{$e->{ELEMENTS}}) {
$res.="\n\t\t$_->{CASE}:\n";
if ($_->{TYPE} ne "EMPTY") {
- $res.="\t\t\t".$self->Element($_, $name, $ifname, undef)."\n";
+ $res.="\t\t\t".$self->Element($_, $name, $ifname, undef, undef)."\n";
}
$res.="\t\tbreak;\n";
}
@@ -758,10 +784,10 @@ sub Const($$$)
my ($self,$const,$ifname) = @_;
if (!defined($const->{ARRAY_LEN}[0])) {
- $self->pidl_hdr("#define $const->{NAME}\t( $const->{VALUE} )\n");
- } else {
- $self->pidl_hdr("#define $const->{NAME}\t $const->{VALUE}\n");
- }
+ $self->pidl_hdr("#define $const->{NAME}\t( $const->{VALUE} )\n");
+ } else {
+ $self->pidl_hdr("#define $const->{NAME}\t $const->{VALUE}\n");
+ }
}
sub Typedef($$$$)
@@ -799,33 +825,33 @@ sub RegisterInterface($$)
$self->{res}->{code}.="\n".DumpEttList($self->{ett})."\n";
if (defined($x->{UUID})) {
- # These can be changed to non-pidl_code names if the old dissectors
- # in epan/dissctors are deleted.
-
- my $name = uc($x->{NAME}) . " (pidl)";
- my $short_name = uc($x->{NAME});
- my $filter_name = $x->{NAME};
-
- if (has_property($x, "helpstring")) {
- $name = $x->{PROPERTIES}->{helpstring};
- }
-
- if (defined($self->{conformance}->{protocols}->{$x->{NAME}})) {
+ # These can be changed to non-pidl_code names if the old dissectors
+ # in epan/dissctors are deleted.
+
+ my $name = uc($x->{NAME}) . " (pidl)";
+ my $short_name = uc($x->{NAME});
+ my $filter_name = $x->{NAME};
+
+ if (has_property($x, "helpstring")) {
+ $name = $x->{PROPERTIES}->{helpstring};
+ }
+
+ if (defined($self->{conformance}->{protocols}->{$x->{NAME}})) {
$short_name = $self->{conformance}->{protocols}->{$x->{NAME}}->{SHORTNAME};
$name = $self->{conformance}->{protocols}->{$x->{NAME}}->{LONGNAME};
$filter_name = $self->{conformance}->{protocols}->{$x->{NAME}}->{FILTERNAME};
- }
+ }
+
+ $self->pidl_code("proto_dcerpc_$x->{NAME} = proto_register_protocol(".make_str($name).", ".make_str($short_name).", ".make_str($filter_name).");");
- $self->pidl_code("proto_dcerpc_$x->{NAME} = proto_register_protocol(".make_str($name).", ".make_str($short_name).", ".make_str($filter_name).");");
-
- $self->pidl_code("proto_register_field_array(proto_dcerpc_$x->{NAME}, hf, array_length (hf));");
- $self->pidl_code("proto_register_subtree_array(ett, array_length(ett));");
+ $self->pidl_code("proto_register_field_array(proto_dcerpc_$x->{NAME}, hf, array_length (hf));");
+ $self->pidl_code("proto_register_subtree_array(ett, array_length(ett));");
} else {
- $self->pidl_code("proto_dcerpc = proto_get_id_by_filter_name(\"dcerpc\");");
- $self->pidl_code("proto_register_field_array(proto_dcerpc, hf, array_length(hf));");
- $self->pidl_code("proto_register_subtree_array(ett, array_length(ett));");
+ $self->pidl_code("proto_dcerpc = proto_get_id_by_filter_name(\"dcerpc\");");
+ $self->pidl_code("proto_register_field_array(proto_dcerpc, hf, array_length(hf));");
+ $self->pidl_code("proto_register_subtree_array(ett, array_length(ett));");
}
-
+
$self->deindent;
$self->pidl_code("}\n");
$self->pidl_fn_end("proto_register_dcerpc_$x->{NAME}");
@@ -837,14 +863,14 @@ sub RegisterInterfaceHandoff($$)
if (defined($x->{UUID})) {
$self->pidl_fn_start("proto_reg_handoff_dcerpc_$x->{NAME}");
- $self->pidl_code("void proto_reg_handoff_dcerpc_$x->{NAME}(void)");
- $self->pidl_code("{");
- $self->indent;
- $self->pidl_code("dcerpc_init_uuid(proto_dcerpc_$x->{NAME}, ett_dcerpc_$x->{NAME},");
- $self->pidl_code("\t&uuid_dcerpc_$x->{NAME}, ver_dcerpc_$x->{NAME},");
- $self->pidl_code("\t$x->{NAME}_dissectors, hf_$x->{NAME}_opnum);");
- $self->deindent;
- $self->pidl_code("}");
+ $self->pidl_code("void proto_reg_handoff_dcerpc_$x->{NAME}(void)");
+ $self->pidl_code("{");
+ $self->indent;
+ $self->pidl_code("dcerpc_init_uuid(proto_dcerpc_$x->{NAME}, ett_dcerpc_$x->{NAME},");
+ $self->pidl_code("\t&uuid_dcerpc_$x->{NAME}, ver_dcerpc_$x->{NAME},");
+ $self->pidl_code("\t$x->{NAME}_dissectors, hf_$x->{NAME}_opnum);");
+ $self->deindent;
+ $self->pidl_code("}");
$self->pidl_fn_end("proto_reg_handoff_dcerpc_$x->{NAME}");
$self->{hf_used}->{"hf_$x->{NAME}_opnum"} = 1;
@@ -892,26 +918,26 @@ sub ProcessInterface($$)
if (defined($x->{UUID})) {
my $if_uuid = $x->{UUID};
- $self->pidl_def("/* Version information */\n\n");
-
- $self->pidl_def("static e_uuid_t uuid_dcerpc_$x->{NAME} = {");
- $self->pidl_def("\t0x" . substr($if_uuid, 1, 8)
- . ", 0x" . substr($if_uuid, 10, 4)
- . ", 0x" . substr($if_uuid, 15, 4) . ",");
- $self->pidl_def("\t{ 0x" . substr($if_uuid, 20, 2)
+ $self->pidl_def("/* Version information */\n\n");
+
+ $self->pidl_def("static e_uuid_t uuid_dcerpc_$x->{NAME} = {");
+ $self->pidl_def("\t0x" . substr($if_uuid, 1, 8)
+ . ", 0x" . substr($if_uuid, 10, 4)
+ . ", 0x" . substr($if_uuid, 15, 4) . ",");
+ $self->pidl_def("\t{ 0x" . substr($if_uuid, 20, 2)
. ", 0x" . substr($if_uuid, 22, 2)
- . ", 0x" . substr($if_uuid, 25, 2)
- . ", 0x" . substr($if_uuid, 27, 2)
- . ", 0x" . substr($if_uuid, 29, 2)
- . ", 0x" . substr($if_uuid, 31, 2)
- . ", 0x" . substr($if_uuid, 33, 2)
- . ", 0x" . substr($if_uuid, 35, 2) . " }");
- $self->pidl_def("};");
-
- my $maj = 0x0000FFFF & $x->{VERSION};
- $maj =~ s/\.(.*)$//g;
- $self->pidl_def("static guint16 ver_dcerpc_$x->{NAME} = $maj;");
- $self->pidl_def("");
+ . ", 0x" . substr($if_uuid, 25, 2)
+ . ", 0x" . substr($if_uuid, 27, 2)
+ . ", 0x" . substr($if_uuid, 29, 2)
+ . ", 0x" . substr($if_uuid, 31, 2)
+ . ", 0x" . substr($if_uuid, 33, 2)
+ . ", 0x" . substr($if_uuid, 35, 2) . " }");
+ $self->pidl_def("};");
+
+ my $maj = 0x0000FFFF & $x->{VERSION};
+ $maj =~ s/\.(.*)$//g;
+ $self->pidl_def("static guint16 ver_dcerpc_$x->{NAME} = $maj;");
+ $self->pidl_def("");
}
$return_types{$x->{NAME}} = {};
@@ -978,7 +1004,7 @@ sub Initialize($$)
$self->register_type("uint$bits", "offset = PIDL_dissect_uint$bits(tvb, offset, pinfo, tree, di, drep, \@HF\@, \@PARAM\@);", "FT_UINT$bits", "BASE_DEC", 0, "NULL", $bytes);
$self->register_type("int$bits", "offset = PIDL_dissect_uint$bits(tvb, offset, pinfo, tree, di, drep, \@HF\@, \@PARAM\@);", "FT_INT$bits", "BASE_DEC", 0, "NULL", $bytes);
}
-
+
$self->register_type("uint3264", "offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep, \@HF\@, NULL);", "FT_UINT32", "BASE_DEC", 0, "NULL", 8);
$self->register_type("hyper", "offset = dissect_ndr_uint64(tvb, offset, pinfo, tree, di, drep, \@HF\@, NULL);", "FT_UINT64", "BASE_DEC", 0, "NULL", 8);
$self->register_type("udlong", "offset = dissect_ndr_duint32(tvb, offset, pinfo, tree, di, drep, \@HF\@, NULL);", "FT_UINT64", "BASE_DEC", 0, "NULL", 4);
@@ -1079,7 +1105,7 @@ sub Parse($$$$$)
$header.=$self->{res}->{hdr};
$self->CheckUsed($self->{conformance});
-
+
return ($parser,$header);
}
@@ -1091,7 +1117,7 @@ sub register_ett($$)
{
my ($self, $name) = @_;
- push (@{$self->{ett}}, $name);
+ push (@{$self->{ett}}, $name);
}
sub DumpEttList
@@ -1167,16 +1193,16 @@ sub DumpHfDeclaration($)
sub make_str_or_null($)
{
- my $str = shift;
- if (substr($str, 0, 1) eq "\"") {
- $str = substr($str, 1, length($str)-2);
- }
- $str =~ s/^\s*//;
- $str =~ s/\s*$//;
- if ($str eq "") {
- return "NULL";
- }
- return make_str($str);
+ my $str = shift;
+ if (substr($str, 0, 1) eq "\"") {
+ $str = substr($str, 1, length($str)-2);
+ }
+ $str =~ s/^\s*//;
+ $str =~ s/\s*$//;
+ if ($str eq "") {
+ return "NULL";
+ }
+ return make_str($str);
}
sub DumpHfList($)
@@ -1187,7 +1213,7 @@ sub DumpHfList($)
foreach (values %{$self->{conformance}->{header_fields}})
{
$res .= "\t{ &$_->{INDEX},
- { ".make_str($_->{NAME}).", ".make_str($_->{FILTER}).", $_->{FT_TYPE}, $_->{BASE_TYPE}, $_->{VALSSTRING}, $_->{MASK}, ".make_str_or_null($_->{BLURB}).", HFILL }},
+ { ".make_str($_->{NAME}).", ".make_str($_->{FILTER}).", $_->{FT_TYPE}, $_->{BASE_TYPE}, $_->{VALSSTRING}, $_->{MASK}, ".make_str_or_null($_->{BLURB}).", HFILL }},
";
}
@@ -1205,7 +1231,7 @@ sub DumpFunctionTable($)
my $res = "static dcerpc_sub_dissector $if->{NAME}\_dissectors[] = {\n";
foreach (@{$if->{FUNCTIONS}}) {
- my $fn_name = $_->{NAME};
+ my $fn_name = $_->{NAME};
$fn_name =~ s/^$if->{NAME}_//;
$res.= "\t{ $_->{OPNUM}, \"$fn_name\",\n";
$res.= "\t $if->{NAME}_dissect_${fn_name}_request, $if->{NAME}_dissect_${fn_name}_response},\n";