pidl/lib/Parse/Pidl/Samba3/ServerNDR.pm

   1 ###################################################
   2 # Samba3 server generator for IDL structures
   3 # on top of Samba4 style NDR functions
   4 # Copyright jelmer@samba.org 2005-2006
   5 # released under the GNU GPL
   6
   7 package Parse::Pidl::Samba3::ServerNDR;
   8
   9 use Exporter;
  10 @ISA = qw(Exporter);
  11 @EXPORT_OK = qw(DeclLevel);
  12
  13 use strict;
  14 use Parse::Pidl qw(warning error fatal);
  15 use Parse::Pidl::Typelist qw(mapTypeName scalar_is_reference);
  16 use Parse::Pidl::Util qw(ParseExpr has_property is_constant);
  17 use Parse::Pidl::NDR qw(GetNextLevel ContainsPipe);
  18 use Parse::Pidl::Samba4 qw(ElementStars DeclLong);
  19 use Parse::Pidl::Samba4::Header qw(GenerateFunctionOutEnv);
  20
  21 use vars qw($VERSION);
  22 $VERSION = '0.01';
  23
  24 my $res;
  25 my $res_hdr;
  26 my $tabs = "";
  27 sub pidl_reset() { $res=""; $res_hdr="", $tabs=""; }
  28 sub pidl_return() { my $s = $res; my $h = $res_hdr; pidl_reset(); return ($s, $h) }
  29 sub indent() { $tabs.="\t"; }
  30 sub deindent() { $tabs = substr($tabs, 1); }
  31 sub pidl($) { my ($txt) = @_; $res .= $txt?$tabs.(shift)."\n":"\n"; }
  32 sub pidl_hdr($) { $res_hdr .= (shift)."\n"; }
  33 sub fn_declare($) { my ($n) = @_; pidl $n; pidl_hdr "$n;"; }
  34
  35 sub DeclLevel($$)
  36 {
  37         my ($e, $l) = @_;
  38         my $res = "";
  39
  40         if (has_property($e, "charset")) {
  41                 $res .= "const char";
  42         } else {
  43                 $res .= mapTypeName($e->{TYPE});
  44         }
  45
  46         my $stars = ElementStars($e, $l);
  47
  48         $res .= " ".$stars unless ($stars eq "");
  49
  50         return $res;
  51 }
  52
  53 sub AllocOutVar($$$$$$$)
  54 {
  55         my ($e, $mem_ctx, $name, $env, $check, $cleanup, $return) = @_;
  56
  57         my $l = $e->{LEVELS}[0];
  58
  59         # we skip pointer to arrays
  60         if ($l->{TYPE} eq "POINTER") {
  61                 my $nl = GetNextLevel($e, $l);
  62                 $l = $nl if ($nl->{TYPE} eq "ARRAY");
  63         } elsif
  64
  65         # we don't support multi-dimentional arrays yet
  66         ($l->{TYPE} eq "ARRAY") {
  67                 my $nl = GetNextLevel($e, $l);
  68                 if ($nl->{TYPE} eq "ARRAY") {
  69                         fatal($e->{ORIGINAL},"multi-dimentional [out] arrays are not supported!");
  70                 }
  71         } else {
  72                 # neither pointer nor array, no need to alloc something.
  73                 return;
  74         }
  75
  76         if ($l->{TYPE} eq "ARRAY") {
  77                 unless(defined($l->{SIZE_IS})) {
  78                         error($e->{ORIGINAL}, "No size known for array `$e->{NAME}'");
  79                         pidl "#error No size known for array `$e->{NAME}'";
  80                 } else {
  81                         my $size = ParseExpr($l->{SIZE_IS}, $env, $e);
  82                         pidl "$name = talloc_zero_array($mem_ctx, " . DeclLevel($e, 1) . ", $size);";
  83                 }
  84         } else {
  85                 pidl "$name = talloc_zero($mem_ctx, " . DeclLevel($e, 1) . ");";
  86         }
  87
  88         pidl "if (" . $check->($name) . ") {";
  89         indent;
  90         pidl $cleanup->($name) if defined($cleanup);
  91         pidl $return->($name) if defined($return);
  92         deindent;
  93         pidl "}";
  94         pidl "";
  95 }
  96
  97 sub CallWithStruct($$$$$$)
  98 {
  99         my ($pipes_struct, $mem_ctx, $fn, $check, $cleanup, $return) = @_;
 100         my $env = GenerateFunctionOutEnv($fn);
 101         my $hasout = 0;
 102         foreach (@{$fn->{ELEMENTS}}) {
 103                 if (grep(/out/, @{$_->{DIRECTION}})) { $hasout = 1; }
 104         }
 105
 106         pidl "ZERO_STRUCT(r->out);" if ($hasout);
 107
 108         foreach (@{$fn->{ELEMENTS}}) {
 109                 my @dir = @{$_->{DIRECTION}};
 110                 if (grep(/in/, @dir) and grep(/out/, @dir)) {
 111                         pidl "r->out.$_->{NAME} = r->in.$_->{NAME};";
 112                 }
 113         }
 114
 115         foreach (@{$fn->{ELEMENTS}}) {
 116                 next if ContainsPipe($_, $_->{LEVELS}[0]);
 117                 my @dir = @{$_->{DIRECTION}};
 118                 if (grep(/in/, @dir) and grep(/out/, @dir)) {
 119                         # noop
 120                 } elsif (grep(/out/, @dir) and not
 121                                  has_property($_, "represent_as")) {
 122                         AllocOutVar($_, $mem_ctx, "r->out.$_->{NAME}", $env,
 123                                     $check, $cleanup, $return);
 124                 }
 125         }
 126
 127         my $proto = "_$fn->{NAME}(struct pipes_struct *p, struct $fn->{NAME} *r)";
 128         my $ret = "_$fn->{NAME}($pipes_struct, r)";
 129
 130         if ($fn->{RETURN_TYPE}) {
 131                 $ret = "r->out.result = $ret";
 132                 $proto = mapTypeName($fn->{RETURN_TYPE})." $proto";
 133         } else {
 134                 $proto = "void $proto";
 135         }
 136
 137         pidl_hdr "$proto;";
 138         pidl "$ret;";
 139 }
 140
 141 sub ParseFunction($$)
 142 {
 143         my ($if,$fn) = @_;
 144
 145         my $op = "NDR_".uc($fn->{NAME});
 146
 147         pidl "static bool api_$fn->{NAME}(struct pipes_struct *p)";
 148         pidl "{";
 149         indent;
 150         pidl "const struct ndr_interface_call *call;";
 151         pidl "struct ndr_pull *pull;";
 152         pidl "struct ndr_push *push;";
 153         pidl "enum ndr_err_code ndr_err;";
 154         pidl "struct $fn->{NAME} *r;";
 155         pidl "";
 156         pidl "call = &ndr_table_$if->{NAME}.calls[$op];";
 157         pidl "";
 158         pidl "r = talloc(talloc_tos(), struct $fn->{NAME});";
 159         pidl "if (r == NULL) {";
 160         pidl "\treturn false;";
 161         pidl "}";
 162         pidl "";
 163         pidl "pull = ndr_pull_init_blob(&p->in_data.data, r);";
 164         pidl "if (pull == NULL) {";
 165         pidl "\ttalloc_free(r);";
 166         pidl "\treturn false;";
 167         pidl "}";
 168         pidl "";
 169         pidl "pull->flags |= LIBNDR_FLAG_REF_ALLOC;";
 170         pidl "if (p->endian) {";
 171         pidl "\tpull->flags |= LIBNDR_FLAG_BIGENDIAN;";
 172         pidl "}";
 173         pidl "ndr_err = call->ndr_pull(pull, NDR_IN, r);";
 174         pidl "if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {";
 175         pidl "\ttalloc_free(r);";
 176         pidl "\treturn false;";
 177         pidl "}";
 178         pidl "";
 179         pidl "if (DEBUGLEVEL >= 10) {";
 180         pidl "\tNDR_PRINT_FUNCTION_DEBUG($fn->{NAME}, NDR_IN, r);";
 181         pidl "}";
 182         pidl "";
 183
 184         CallWithStruct("p", "r", $fn,
 185                 sub ($) {
 186                         my ($name) = @_;
 187                         return "${name} == NULL";
 188                 },
 189                 sub ($) {
 190                         my ($name) = @_;
 191                         return "talloc_free(r);";
 192                 },
 193                 sub ($) {
 194                         my ($name) = @_;
 195                         return "return false;";
 196                 }
 197         );
 198
 199         pidl "";
 200         pidl "if (p->fault_state) {";
 201         pidl "\ttalloc_free(r);";
 202         pidl "\t/* Return true here, srv_pipe_hnd.c will take care */";
 203         pidl "\treturn true;";
 204         pidl "}";
 205         pidl "";
 206         pidl "if (DEBUGLEVEL >= 10) {";
 207         pidl "\tNDR_PRINT_FUNCTION_DEBUG($fn->{NAME}, NDR_OUT | NDR_SET_VALUES, r);";
 208         pidl "}";
 209         pidl "";
 210         pidl "push = ndr_push_init_ctx(r);";
 211         pidl "if (push == NULL) {";
 212         pidl "\ttalloc_free(r);";
 213         pidl "\treturn false;";
 214         pidl "}";
 215         pidl "";
 216         pidl "/*";
 217         pidl " * carry over the pointer count to the reply in case we are";
 218         pidl " * using full pointer. See NDR specification for full pointers";
 219         pidl " */";
 220         pidl "push->ptr_count = pull->ptr_count;";
 221         pidl "";
 222         pidl "ndr_err = call->ndr_push(push, NDR_OUT, r);";
 223         pidl "if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {";
 224         pidl "\ttalloc_free(r);";
 225         pidl "\treturn false;";
 226         pidl "}";
 227         pidl "";
 228         pidl "p->out_data.rdata = ndr_push_blob(push);";
 229         pidl "talloc_steal(p->mem_ctx, p->out_data.rdata.data);";
 230         pidl "";
 231         pidl "talloc_free(r);";
 232         pidl "";
 233         pidl "return true;";
 234         deindent;
 235         pidl "}";
 236         pidl "";
 237 }
 238
 239 sub ParseInterface($)
 240 {
 241         my $if = shift;
 242
 243         my $uif = uc($if->{NAME});
 244
 245         pidl_hdr "#ifndef __SRV_$uif\__";
 246         pidl_hdr "#define __SRV_$uif\__";
 247
 248         foreach (@{$if->{FUNCTIONS}}) {
 249                 next if ($_->{PROPERTIES}{noopnum});
 250                 ParseFunction($if, $_);
 251         }
 252
 253         pidl "";
 254         pidl "/* Tables */";
 255         pidl "static struct api_struct api_$if->{NAME}_cmds[] = ";
 256         pidl "{";
 257         indent;
 258
 259         foreach (@{$if->{FUNCTIONS}}) {
 260                 next if ($_->{PROPERTIES}{noopnum});
 261                 pidl "{\"" . uc($_->{NAME}) . "\", NDR_" . uc($_->{NAME}) . ", api_$_->{NAME}},";
 262         }
 263
 264         deindent;
 265         pidl "};";
 266
 267         pidl "";
 268
 269         pidl_hdr "void $if->{NAME}_get_pipe_fns(struct api_struct **fns, int *n_fns);";
 270         pidl "void $if->{NAME}_get_pipe_fns(struct api_struct **fns, int *n_fns)";
 271         pidl "{";
 272         indent;
 273         pidl "*fns = api_$if->{NAME}_cmds;";
 274         pidl "*n_fns = sizeof(api_$if->{NAME}_cmds) / sizeof(struct api_struct);";
 275         deindent;
 276         pidl "}";
 277         pidl "";
 278
 279         if (not has_property($if, "no_srv_register")) {
 280             pidl_hdr "struct rpc_srv_callbacks;";
 281             pidl_hdr "NTSTATUS rpc_$if->{NAME}_init(const struct rpc_srv_callbacks *rpc_srv_cb);";
 282             pidl "NTSTATUS rpc_$if->{NAME}_init(const struct rpc_srv_callbacks *rpc_srv_cb)";
 283             pidl "{";
 284             pidl "\treturn rpc_srv_register(SMB_RPC_INTERFACE_VERSION, \"$if->{NAME}\", \"$if->{NAME}\", \&ndr_table_$if->{NAME}, api_$if->{NAME}_cmds, sizeof(api_$if->{NAME}_cmds) / sizeof(struct api_struct), rpc_srv_cb);";
 285             pidl "}";
 286
 287             pidl "";
 288
 289             pidl_hdr "NTSTATUS rpc_$if->{NAME}_shutdown(void);";
 290             pidl "NTSTATUS rpc_$if->{NAME}_shutdown(void)";
 291             pidl "{";
 292             pidl "\treturn rpc_srv_unregister(\&ndr_table_$if->{NAME});";
 293             pidl "}";
 294         }
 295         pidl_hdr "#endif /* __SRV_$uif\__ */";
 296 }
 297
 298 sub Parse($$$)
 299 {
 300         my($ndr,$header,$ndr_header) = @_;
 301
 302         pidl_reset();
 303
 304         pidl "/*";
 305         pidl " * Unix SMB/CIFS implementation.";
 306         pidl " * server auto-generated by pidl. DO NOT MODIFY!";
 307         pidl " */";
 308         pidl "";
 309         pidl "#include \"includes.h\"";
 310         pidl "#include \"ntdomain.h\"";
 311         pidl "#include \"$header\"";
 312         pidl_hdr "#include \"$ndr_header\"";
 313         pidl "";
 314
 315         foreach (@$ndr) {
 316                 ParseInterface($_) if ($_->{TYPE} eq "INTERFACE");
 317         }
 318
 319         return pidl_return();
 320 }
 321
 322 1;