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      1 /*
      2  * Copyright (c) 2012 The Chromium Authors. All rights reserved.
      3  * Use of this source code is governed by a BSD-style license that can be
      4  * found in the LICENSE file.
      5  */
      6 
      7 /*
      8  * Post-message based test for simple rpc based access to name services.
      9  *
     10  * Converted from srpc_nameservice_test (deprecated), i.e., C -> C++,
     11  * srpc -> post message.
     12  */
     13 #include <string>
     14 
     15 #include <assert.h>
     16 #include <stdio.h>
     17 #include <stdlib.h>
     18 #include <inttypes.h>
     19 #include <sys/fcntl.h>
     20 #include <string.h>
     21 #include <unistd.h>
     22 
     23 #include "native_client/src/include/nacl_scoped_ptr.h"
     24 #include "native_client/src/public/imc_syscalls.h"
     25 #include "native_client/src/public/name_service.h"
     26 #include "native_client/src/shared/srpc/nacl_srpc.h"
     27 
     28 #include "ppapi/cpp/instance.h"
     29 #include "ppapi/cpp/module.h"
     30 #include "ppapi/cpp/var.h"
     31 
     32 #include "ppapi/native_client/src/untrusted/nacl_ppapi_util/nacl_ppapi_util.h"
     33 #include "ppapi/native_client/src/untrusted/nacl_ppapi_util/string_buffer.h"
     34 
     35 #define RNG_OUTPUT_BYTES  1024
     36 
     37 #define BYTES_PER_LINE    32
     38 #define BYTE_SPACING      4
     39 
     40 bool            g_ns_channel_initialized = false;
     41 NaClSrpcChannel g_ns_channel;
     42 
     43 void dump_output(nacl::StringBuffer *sb, int d, size_t nbytes) {
     44   nacl::scoped_array<uint8_t> bytes;
     45   size_t                      got;
     46   int                         copied;
     47 
     48   bytes.reset(new uint8_t[nbytes]);
     49   if (NULL == bytes.get()) {
     50     perror("dump_output");
     51     fprintf(stderr, "No memory\n");
     52     return;
     53   }
     54   // Read the RNG output.
     55   for (got = 0; got < nbytes; got += copied) {
     56     copied = read(d, bytes.get() + got, nbytes - got);
     57     if (-1 == copied) {
     58       perror("dump_output:read");
     59       fprintf(stderr, "read failure\n");
     60       break;
     61     }
     62     printf("read(%d, ..., %u) -> %d\n", d, nbytes - got, copied);
     63   }
     64   // Hex dump it so we can eyeball it for randomness.  Ideally we
     65   // would have a chi-square test here to test randomness.
     66   for (size_t ix = 0; ix < got; ++ix) {
     67     if (0 == (ix & (BYTES_PER_LINE - 1))) {
     68       sb->Printf("\n%04x:", ix);
     69     } else if (0 == (ix & (BYTE_SPACING - 1))) {
     70       sb->Printf(" ");
     71     }
     72     sb->Printf("%02x", bytes[ix]);
     73   }
     74   sb->Printf("\n");
     75 }
     76 
     77 void Initialize(const pp::Var& message_data, nacl::StringBuffer* sb) {
     78   if (g_ns_channel_initialized) {
     79     return;
     80   }
     81   int ns = -1;
     82   nacl_nameservice(&ns);
     83   printf("ns = %d\n", ns);
     84   assert(-1 != ns);
     85   int connected_socket = imc_connect(ns);
     86   assert(-1 != connected_socket);
     87   if (!NaClSrpcClientCtor(&g_ns_channel, connected_socket)) {
     88     sb->Printf("Srpc client channel ctor failed\n");
     89     close(ns);
     90   }
     91   sb->Printf("NaClSrpcClientCtor succeeded\n");
     92   close(ns);
     93   g_ns_channel_initialized = 1;
     94 }
     95 
     96 //
     97 // Dump RNG output into a string.
     98 //
     99 void RngDump(const pp::Var& message_data, nacl::StringBuffer* sb) {
    100   NaClSrpcError rpc_result;
    101   int status;
    102   int rng;
    103 
    104   Initialize(message_data, sb);
    105 
    106   rpc_result = NaClSrpcInvokeBySignature(&g_ns_channel,
    107                                          NACL_NAME_SERVICE_LOOKUP,
    108                                          "SecureRandom", O_RDONLY,
    109                                          &status, &rng);
    110   assert(NACL_SRPC_RESULT_OK == rpc_result);
    111   printf("rpc status %d\n", status);
    112   assert(NACL_NAME_SERVICE_SUCCESS == status);
    113   printf("rng descriptor %d\n", rng);
    114 
    115   dump_output(sb, rng, RNG_OUTPUT_BYTES);
    116   close(rng);
    117 }
    118 
    119 void ManifestTest(const pp::Var& message_data, nacl::StringBuffer* sb) {
    120   int status = -1;
    121   int manifest;
    122 
    123   Initialize(message_data, sb);
    124 
    125   // Make the name service lookup for the manifest service descriptor.
    126   if (NACL_SRPC_RESULT_OK !=
    127       NaClSrpcInvokeBySignature(&g_ns_channel, NACL_NAME_SERVICE_LOOKUP,
    128                                 "ManifestNameService", O_RDWR,
    129                                 &status, &manifest) ||
    130       NACL_NAME_SERVICE_SUCCESS != status) {
    131     fprintf(stderr, "nameservice lookup failed, status %d\n", status);
    132     return;
    133   }
    134   sb->Printf("Got manifest descriptor %d\n", manifest);
    135   if (-1 == manifest) {
    136     return;
    137   }
    138 
    139   // Connect to manifest name server.
    140   int manifest_conn = imc_connect(manifest);
    141   close(manifest);
    142   sb->Printf("got manifest connection %d\n", manifest_conn);
    143   if (-1 == manifest_conn) {
    144     sb->Printf("could not connect\n");
    145     return;
    146   }
    147   sb->DiscardOutput();
    148   sb->Printf("ManifestTest: basic connectivity ok\n");
    149 
    150   close(manifest_conn);
    151 }
    152 
    153 struct PostMessageHandlerDesc {
    154   char const *request;
    155   void (*handler)(const pp::Var& message_data, nacl::StringBuffer* out);
    156 };
    157 
    158 // This object represents one time the page says <embed>.
    159 class MyInstance : public pp::Instance {
    160  public:
    161   explicit MyInstance(PP_Instance instance) : pp::Instance(instance) {}
    162   virtual ~MyInstance() {}
    163   virtual void HandleMessage(const pp::Var& message_data);
    164 };
    165 
    166 // HandleMessage gets invoked when postMessage is called on the DOM
    167 // element associated with this plugin instance.  In this case, if we
    168 // are given a string, we'll post a message back to JavaScript with a
    169 // reply string -- essentially treating this as a string-based RPC.
    170 void MyInstance::HandleMessage(const pp::Var& message_data) {
    171   static struct PostMessageHandlerDesc kMsgHandlers[] = {
    172     { "init", Initialize },
    173     { "rng", RngDump },
    174     { "manifest_test", ManifestTest },
    175     { reinterpret_cast<char const *>(NULL),
    176       reinterpret_cast<void (*)(const pp::Var&, nacl::StringBuffer*)>(NULL) }
    177   };
    178   nacl::StringBuffer sb;
    179 
    180   if (message_data.is_string()) {
    181     std::string op_name(message_data.AsString());
    182     std::string reply;
    183     size_t len;
    184 
    185     fprintf(stderr, "Searching for handler for request \"%s\".\n",
    186             op_name.c_str());
    187 
    188     for (size_t ix = 0; kMsgHandlers[ix].request != NULL; ++ix) {
    189       if (op_name == kMsgHandlers[ix].request) {
    190         fprintf(stderr, "found at index %u\n", ix);
    191         kMsgHandlers[ix].handler(message_data, &sb);
    192         break;
    193       }
    194     }
    195 
    196     reply = sb.ToString();
    197     len = strlen(reply.c_str());
    198     fprintf(stderr, "posting reply len %d\n", len);
    199     // fprintf(stderr, "posting reply \"%s\".\n", sb.ToString().c_str());
    200     fprintf(stderr, "posting reply \"");
    201     fflush(stderr);
    202     write(2, reply.c_str(), len);
    203     fprintf(stderr, "\".\n");
    204     fflush(stderr);
    205 
    206     PostMessage(pp::Var(sb.ToString()));
    207     fprintf(stderr, "returning\n");
    208     fflush(stderr);
    209   }
    210 }
    211 
    212 // This object is the global object representing this plugin library as long
    213 // as it is loaded.
    214 class MyModule : public pp::Module {
    215  public:
    216   MyModule() : pp::Module() {}
    217   virtual ~MyModule() {}
    218 
    219   // Override CreateInstance to create your customized Instance object.
    220   virtual pp::Instance* CreateInstance(PP_Instance instance) {
    221     return new MyInstance(instance);
    222   }
    223 };
    224 
    225 namespace pp {
    226 
    227 // Factory function for your specialization of the Module object.
    228 Module* CreateModule() {
    229   return new MyModule();
    230 }
    231 
    232 }  // namespace pp
    233