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The Tor Browser
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acceptreademu.c (8370B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 /*
      7 * This test is the same as acceptread.c except that it uses the
      8 * emulated acceptread method instead of the regular acceptread.
      9 */
     10 
     11 #include <prio.h>
     12 #include <prprf.h>
     13 #include <prinit.h>
     14 #include <prnetdb.h>
     15 #include <prinrval.h>
     16 #include <prthread.h>
     17 #include <pprio.h>
     18 
     19 #include <plerror.h>
     20 
     21 #include <stdlib.h>
     22 
     23 #ifdef DEBUG
     24 #  define PORT_INC_DO +100
     25 #else
     26 #  define PORT_INC_DO
     27 #endif
     28 #ifdef IS_64
     29 #  define PORT_INC_3264 +200
     30 #else
     31 #  define PORT_INC_3264
     32 #endif
     33 
     34 #define DEFAULT_PORT 12273 PORT_INC_DO PORT_INC_3264
     35 #define GET "GET / HTTP/1.0\n\n"
     36 static PRFileDesc *std_out, *err_out;
     37 static PRIntervalTime write_dally, accept_timeout;
     38 static PRDescIdentity emu_layer_ident;
     39 static PRIOMethods emu_layer_methods;
     40 
     41 /* the acceptread method in emu_layer_methods */
     42 static PRInt32 PR_CALLBACK emu_AcceptRead(PRFileDesc* sd, PRFileDesc** nd,
     43                                          PRNetAddr** raddr, void* buf,
     44                                          PRInt32 amount,
     45                                          PRIntervalTime timeout) {
     46  return PR_EmulateAcceptRead(sd, nd, raddr, buf, amount, timeout);
     47 }
     48 
     49 static PRStatus PrintAddress(const PRNetAddr* address) {
     50  char buffer[100];
     51  PRStatus rv = PR_NetAddrToString(address, buffer, sizeof(buffer));
     52  if (PR_FAILURE == rv) {
     53    PL_FPrintError(err_out, "PR_NetAddrToString");
     54  } else
     55    PR_fprintf(std_out, "Accepted connection from (0x%p)%s:%d\n", address,
     56               buffer, address->inet.port);
     57  return rv;
     58 } /* PrintAddress */
     59 
     60 static void ConnectingThread(void* arg) {
     61  PRInt32 nbytes;
     62  char buf[1024];
     63  PRFileDesc* sock;
     64  PRNetAddr peer_addr, *addr;
     65 
     66  addr = (PRNetAddr*)arg;
     67 
     68  sock = PR_NewTCPSocket();
     69  if (sock == NULL) {
     70    PL_FPrintError(err_out, "PR_NewTCPSocket (client) failed");
     71    PR_ProcessExit(1);
     72  }
     73 
     74  if (PR_Connect(sock, addr, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) {
     75    PL_FPrintError(err_out, "PR_Connect (client) failed");
     76    PR_ProcessExit(1);
     77  }
     78  if (PR_GetPeerName(sock, &peer_addr) == PR_FAILURE) {
     79    PL_FPrintError(err_out, "PR_GetPeerName (client) failed");
     80    PR_ProcessExit(1);
     81  }
     82 
     83  /*
     84  ** Then wait between the connection coming up and sending the expected
     85  ** data. At some point in time, the server should fail due to a timeou
     86  ** on the AcceptRead() operation, which according to the document is
     87  ** only due to the read() portion.
     88  */
     89  PR_Sleep(write_dally);
     90 
     91  nbytes = PR_Send(sock, GET, sizeof(GET), 0, PR_INTERVAL_NO_TIMEOUT);
     92  if (nbytes == -1) {
     93    PL_FPrintError(err_out, "PR_Send (client) failed");
     94  }
     95 
     96  nbytes = PR_Recv(sock, buf, sizeof(buf), 0, PR_INTERVAL_NO_TIMEOUT);
     97  if (nbytes == -1) {
     98    PL_FPrintError(err_out, "PR_Recv (client) failed");
     99  } else {
    100    PR_fprintf(std_out, "PR_Recv (client) succeeded: %d bytes\n", nbytes);
    101    buf[sizeof(buf) - 1] = '\0';
    102    PR_fprintf(std_out, "%s\n", buf);
    103  }
    104 
    105  if (PR_FAILURE == PR_Shutdown(sock, PR_SHUTDOWN_BOTH)) {
    106    PL_FPrintError(err_out, "PR_Shutdown (client) failed");
    107  }
    108 
    109  if (PR_FAILURE == PR_Close(sock)) {
    110    PL_FPrintError(err_out, "PR_Close (client) failed");
    111  }
    112 
    113  return;
    114 } /* ConnectingThread */
    115 
    116 #define BUF_SIZE 117
    117 static void AcceptingThread(void* arg) {
    118  PRStatus rv;
    119  PRInt32 bytes;
    120  PRSize buf_size = BUF_SIZE;
    121  PRUint8 buf[BUF_SIZE + (2 * sizeof(PRNetAddr)) + 32];
    122  PRNetAddr *accept_addr, *listen_addr = (PRNetAddr*)arg;
    123  PRFileDesc *accept_sock, *listen_sock = PR_NewTCPSocket();
    124  PRFileDesc* layer;
    125  PRSocketOptionData sock_opt;
    126 
    127  if (NULL == listen_sock) {
    128    PL_FPrintError(err_out, "PR_NewTCPSocket (server) failed");
    129    PR_ProcessExit(1);
    130  }
    131  layer = PR_CreateIOLayerStub(emu_layer_ident, &emu_layer_methods);
    132  if (NULL == layer) {
    133    PL_FPrintError(err_out, "PR_CreateIOLayerStub (server) failed");
    134    PR_ProcessExit(1);
    135  }
    136  if (PR_PushIOLayer(listen_sock, PR_TOP_IO_LAYER, layer) == PR_FAILURE) {
    137    PL_FPrintError(err_out, "PR_PushIOLayer (server) failed");
    138    PR_ProcessExit(1);
    139  }
    140  sock_opt.option = PR_SockOpt_Reuseaddr;
    141  sock_opt.value.reuse_addr = PR_TRUE;
    142  rv = PR_SetSocketOption(listen_sock, &sock_opt);
    143  if (PR_FAILURE == rv) {
    144    PL_FPrintError(err_out, "PR_SetSocketOption (server) failed");
    145    PR_ProcessExit(1);
    146  }
    147  rv = PR_Bind(listen_sock, listen_addr);
    148  if (PR_FAILURE == rv) {
    149    PL_FPrintError(err_out, "PR_Bind (server) failed");
    150    PR_ProcessExit(1);
    151  }
    152  rv = PR_Listen(listen_sock, 10);
    153  if (PR_FAILURE == rv) {
    154    PL_FPrintError(err_out, "PR_Listen (server) failed");
    155    PR_ProcessExit(1);
    156  }
    157  bytes = PR_AcceptRead(listen_sock, &accept_sock, &accept_addr, buf, buf_size,
    158                        accept_timeout);
    159 
    160  if (-1 == bytes) {
    161    PL_FPrintError(err_out, "PR_AcceptRead (server) failed");
    162  } else {
    163    PrintAddress(accept_addr);
    164    PR_fprintf(std_out, "(Server) read [0x%p..0x%p) %s\n", buf, &buf[BUF_SIZE],
    165               buf);
    166    bytes = PR_Write(accept_sock, buf, bytes);
    167    rv = PR_Shutdown(accept_sock, PR_SHUTDOWN_BOTH);
    168    if (PR_FAILURE == rv) {
    169      PL_FPrintError(err_out, "PR_Shutdown (server) failed");
    170    }
    171  }
    172 
    173  if (-1 != bytes) {
    174    rv = PR_Close(accept_sock);
    175    if (PR_FAILURE == rv) {
    176      PL_FPrintError(err_out, "PR_Close (server) failed");
    177    }
    178  }
    179 
    180  rv = PR_Close(listen_sock);
    181  if (PR_FAILURE == rv) {
    182    PL_FPrintError(err_out, "PR_Close (server) failed");
    183  }
    184 } /* AcceptingThread */
    185 
    186 int main(int argc, char** argv) {
    187  PRHostEnt he;
    188  PRStatus status;
    189  PRIntn next_index;
    190  PRUint16 port_number;
    191  char netdb_buf[PR_NETDB_BUF_SIZE];
    192  PRNetAddr client_addr, server_addr;
    193  PRThread *client_thread, *server_thread;
    194  PRIntervalTime delta = PR_MillisecondsToInterval(500);
    195 
    196  err_out = PR_STDERR;
    197  std_out = PR_STDOUT;
    198  accept_timeout = PR_SecondsToInterval(2);
    199  emu_layer_ident = PR_GetUniqueIdentity("Emulated AcceptRead");
    200  emu_layer_methods = *PR_GetDefaultIOMethods();
    201  emu_layer_methods.acceptread = emu_AcceptRead;
    202 
    203  if (argc != 2 && argc != 3) {
    204    port_number = DEFAULT_PORT;
    205  } else {
    206    port_number = (PRUint16)atoi(argv[(argc == 2) ? 1 : 2]);
    207  }
    208 
    209  status = PR_InitializeNetAddr(PR_IpAddrAny, port_number, &server_addr);
    210  if (PR_SUCCESS != status) {
    211    PL_FPrintError(err_out, "PR_InitializeNetAddr failed");
    212    PR_ProcessExit(1);
    213  }
    214  if (argc < 3) {
    215    status = PR_InitializeNetAddr(PR_IpAddrLoopback, port_number, &client_addr);
    216    if (PR_SUCCESS != status) {
    217      PL_FPrintError(err_out, "PR_InitializeNetAddr failed");
    218      PR_ProcessExit(1);
    219    }
    220  } else {
    221    status = PR_GetHostByName(argv[1], netdb_buf, sizeof(netdb_buf), &he);
    222    if (status == PR_FAILURE) {
    223      PL_FPrintError(err_out, "PR_GetHostByName failed");
    224      PR_ProcessExit(1);
    225    }
    226    next_index = PR_EnumerateHostEnt(0, &he, port_number, &client_addr);
    227    if (next_index == -1) {
    228      PL_FPrintError(err_out, "PR_EnumerateHostEnt failed");
    229      PR_ProcessExit(1);
    230    }
    231  }
    232 
    233  for (write_dally = 0; write_dally < accept_timeout + (2 * delta);
    234       write_dally += delta) {
    235    PR_fprintf(std_out, "Testing w/ write_dally = %d msec\n",
    236               PR_IntervalToMilliseconds(write_dally));
    237    server_thread = PR_CreateThread(PR_USER_THREAD, AcceptingThread,
    238                                    &server_addr, PR_PRIORITY_NORMAL,
    239                                    PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
    240    if (server_thread == NULL) {
    241      PL_FPrintError(err_out, "PR_CreateThread (server) failed");
    242      PR_ProcessExit(1);
    243    }
    244 
    245    PR_Sleep(delta); /* let the server pot thicken */
    246 
    247    client_thread = PR_CreateThread(PR_USER_THREAD, ConnectingThread,
    248                                    &client_addr, PR_PRIORITY_NORMAL,
    249                                    PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
    250    if (client_thread == NULL) {
    251      PL_FPrintError(err_out, "PR_CreateThread (client) failed");
    252      PR_ProcessExit(1);
    253    }
    254 
    255    if (PR_JoinThread(client_thread) == PR_FAILURE) {
    256      PL_FPrintError(err_out, "PR_JoinThread (client) failed");
    257    }
    258 
    259    if (PR_JoinThread(server_thread) == PR_FAILURE) {
    260      PL_FPrintError(err_out, "PR_JoinThread (server) failed");
    261    }
    262  }
    263 
    264  return 0;
    265 }