/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "prio.h"
#include "prmem.h"
#include "prprf.h"
#include "prlog.h"
#include "prerror.h"
#include "prnetdb.h"
#include "prthread.h"

#include "plerror.h"
#include "plgetopt.h"

#include <stdlib.h>
#include <string.h>

/*
** Testing layering of I/O
**
**      The layered server
** A thread that acts as a server. It creates a TCP listener with a dummy
** layer pushed on top. Then listens for incoming connections. Each connection
** request for connection will be layered as well, accept one request, echo
** it back and close.
**
**      The layered client
** Pretty much what you'd expect.
*/

static PRFileDesc* logFile;
static PRDescIdentity identity;
static PRNetAddr server_address;

static PRIOMethods myMethods;

typedef enum { rcv_get_debit, rcv_send_credit, rcv_data } RcvState;
typedef enum { xmt_send_debit, xmt_recv_credit, xmt_data } XmtState;

struct PRFilePrivate {
  RcvState rcvstate;
  XmtState xmtstate;
  PRInt32 rcvreq, rcvinprogress;
  PRInt32 xmtreq, xmtinprogress;
};

typedef enum Verbosity { silent, quiet, chatty, noisy } Verbosity;

static PRIntn minor_iterations = 5;
static PRIntn major_iterations = 1;
static Verbosity verbosity = quiet;

#ifdef DEBUG
#  define PORT_INC_DO +100
#else
#  define PORT_INC_DO
#endif
#ifdef IS_64
#  define PORT_INC_3264 +200
#else
#  define PORT_INC_3264
#endif

static PRUint16 default_port = 12273 PORT_INC_DO PORT_INC_3264;

static PRFileDesc* PushLayer(PRFileDesc* stack) {
  PRStatus rv;
  PRFileDesc* layer = PR_CreateIOLayerStub(identity, &myMethods);
  layer->secret = PR_NEWZAP(PRFilePrivate);
  rv = PR_PushIOLayer(stack, PR_GetLayersIdentity(stack), layer);
  PR_ASSERT(PR_SUCCESS == rv);
  if (verbosity > quiet) {
    PR_fprintf(logFile, "Pushed layer(0x%x) onto stack(0x%x)\n", layer, stack);
  }
  return stack;
} /* PushLayer */

static PRFileDesc* PopLayer(PRFileDesc* stack) {
  PRFileDesc* popped = PR_PopIOLayer(stack, identity);
  if (verbosity > quiet) {
    PR_fprintf(logFile, "Popped layer(0x%x) from stack(0x%x)\n", popped, stack);
  }
  PR_DELETE(popped->secret);
  popped->dtor(popped);
  return stack;
} /* PopLayer */

static void PR_CALLBACK Client(void* arg) {
  PRStatus rv;
  PRIntn mits;
  PRInt32 ready;
  PRUint8 buffer[100];
  PRPollDesc polldesc;
  PRIntn empty_flags = 0;
  PRIntn bytes_read, bytes_sent;
  PRFileDesc* stack = (PRFileDesc*)arg;

  /* Initialize the buffer so that Purify won't complain */
  memset(buffer, 0, sizeof(buffer));

  rv = PR_Connect(stack, &server_address, PR_INTERVAL_NO_TIMEOUT);
  if ((PR_FAILURE == rv) && (PR_IN_PROGRESS_ERROR == PR_GetError())) {
    if (verbosity > quiet) {
      PR_fprintf(logFile, "Client connect 'in progress'\n");
    }
    do {
      polldesc.fd = stack;
      polldesc.out_flags = 0;
      polldesc.in_flags = PR_POLL_WRITE | PR_POLL_EXCEPT;
      ready = PR_Poll(&polldesc, 1, PR_INTERVAL_NO_TIMEOUT);
      if ((1 != ready) /* if not 1, then we're dead */
          || (0 == (polldesc.in_flags & polldesc.out_flags))) {
        PR_NOT_REACHED("Whoa!");
        break;
      }
      if (verbosity > quiet)
        PR_fprintf(logFile, "Client connect 'in progress' [0x%x]\n",
                   polldesc.out_flags);
      rv = PR_GetConnectStatus(&polldesc);
      if ((PR_FAILURE == rv) && (PR_IN_PROGRESS_ERROR != PR_GetError())) {
        break;
      }
    } while (PR_FAILURE == rv);
  }
  PR_ASSERT(PR_SUCCESS == rv);
  if (verbosity > chatty) {
    PR_fprintf(logFile, "Client created connection\n");
  }

  for (mits = 0; mits < minor_iterations; ++mits) {
    bytes_sent = 0;
    if (verbosity > quiet) {
      PR_fprintf(logFile, "Client sending %d bytes\n", sizeof(buffer));
    }
    do {
      if (verbosity > chatty)
        PR_fprintf(logFile, "Client sending %d bytes\n",
                   sizeof(buffer) - bytes_sent);
      ready = PR_Send(stack, buffer + bytes_sent, sizeof(buffer) - bytes_sent,
                      empty_flags, PR_INTERVAL_NO_TIMEOUT);
      if (verbosity > chatty) {
        PR_fprintf(logFile, "Client send status [%d]\n", ready);
      }
      if (0 < ready) {
        bytes_sent += ready;
      } else if ((-1 == ready) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
        polldesc.fd = stack;
        polldesc.out_flags = 0;
        polldesc.in_flags = PR_POLL_WRITE;
        ready = PR_Poll(&polldesc, 1, PR_INTERVAL_NO_TIMEOUT);
        if ((1 != ready) /* if not 1, then we're dead */
            || (0 == (polldesc.in_flags & polldesc.out_flags))) {
          PR_NOT_REACHED("Whoa!");
          break;
        }
      } else {
        break;
      }
    } while (bytes_sent < sizeof(buffer));
    PR_ASSERT(sizeof(buffer) == bytes_sent);

    bytes_read = 0;
    do {
      if (verbosity > chatty)
        PR_fprintf(logFile, "Client receiving %d bytes\n",
                   bytes_sent - bytes_read);
      ready = PR_Recv(stack, buffer + bytes_read, bytes_sent - bytes_read,
                      empty_flags, PR_INTERVAL_NO_TIMEOUT);
      if (verbosity > chatty)
        PR_fprintf(logFile, "Client receive status [%d]\n", ready);
      if (0 < ready) {
        bytes_read += ready;
      } else if ((-1 == ready) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
        polldesc.fd = stack;
        polldesc.out_flags = 0;
        polldesc.in_flags = PR_POLL_READ;
        ready = PR_Poll(&polldesc, 1, PR_INTERVAL_NO_TIMEOUT);
        if ((1 != ready) /* if not 1, then we're dead */
            || (0 == (polldesc.in_flags & polldesc.out_flags))) {
          PR_NOT_REACHED("Whoa!");
          break;
        }
      } else {
        break;
      }
    } while (bytes_read < bytes_sent);
    if (verbosity > chatty) {
      PR_fprintf(logFile, "Client received %d bytes\n", bytes_read);
    }
    PR_ASSERT(bytes_read == bytes_sent);
  }

  if (verbosity > quiet) {
    PR_fprintf(logFile, "Client shutting down stack\n");
  }

  rv = PR_Shutdown(stack, PR_SHUTDOWN_BOTH);
  PR_ASSERT(PR_SUCCESS == rv);
} /* Client */

static void PR_CALLBACK Server(void* arg) {
  PRStatus rv;
  PRInt32 ready;
  PRUint8 buffer[100];
  PRFileDesc* service;
  PRUintn empty_flags = 0;
  struct PRPollDesc polldesc;
  PRIntn bytes_read, bytes_sent;
  PRFileDesc* stack = (PRFileDesc*)arg;
  PRNetAddr client_address;

  do {
    if (verbosity > chatty) {
      PR_fprintf(logFile, "Server accepting connection\n");
    }
    service = PR_Accept(stack, &client_address, PR_INTERVAL_NO_TIMEOUT);
    if (verbosity > chatty) {
      PR_fprintf(logFile, "Server accept status [0x%p]\n", service);
    }
    if ((NULL == service) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
      polldesc.fd = stack;
      polldesc.out_flags = 0;
      polldesc.in_flags = PR_POLL_READ | PR_POLL_EXCEPT;
      ready = PR_Poll(&polldesc, 1, PR_INTERVAL_NO_TIMEOUT);
      if ((1 != ready) /* if not 1, then we're dead */
          || (0 == (polldesc.in_flags & polldesc.out_flags))) {
        PR_NOT_REACHED("Whoa!");
        break;
      }
    }
  } while (NULL == service);
  PR_ASSERT(NULL != service);

  if (verbosity > quiet) {
    PR_fprintf(logFile, "Server accepting connection\n");
  }

  do {
    bytes_read = 0;
    do {
      if (verbosity > chatty)
        PR_fprintf(logFile, "Server receiving %d bytes\n",
                   sizeof(buffer) - bytes_read);
      ready = PR_Recv(service, buffer + bytes_read, sizeof(buffer) - bytes_read,
                      empty_flags, PR_INTERVAL_NO_TIMEOUT);
      if (verbosity > chatty) {
        PR_fprintf(logFile, "Server receive status [%d]\n", ready);
      }
      if (0 < ready) {
        bytes_read += ready;
      } else if ((-1 == ready) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
        polldesc.fd = service;
        polldesc.out_flags = 0;
        polldesc.in_flags = PR_POLL_READ;
        ready = PR_Poll(&polldesc, 1, PR_INTERVAL_NO_TIMEOUT);
        if ((1 != ready) /* if not 1, then we're dead */
            || (0 == (polldesc.in_flags & polldesc.out_flags))) {
          PR_NOT_REACHED("Whoa!");
          break;
        }
      } else {
        break;
      }
    } while (bytes_read < sizeof(buffer));

    if (0 != bytes_read) {
      if (verbosity > chatty) {
        PR_fprintf(logFile, "Server received %d bytes\n", bytes_read);
      }
      PR_ASSERT(bytes_read > 0);

      bytes_sent = 0;
      do {
        ready = PR_Send(service, buffer + bytes_sent, bytes_read - bytes_sent,
                        empty_flags, PR_INTERVAL_NO_TIMEOUT);
        if (0 < ready) {
          bytes_sent += ready;
        } else if ((-1 == ready) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          polldesc.fd = service;
          polldesc.out_flags = 0;
          polldesc.in_flags = PR_POLL_WRITE;
          ready = PR_Poll(&polldesc, 1, PR_INTERVAL_NO_TIMEOUT);
          if ((1 != ready) /* if not 1, then we're dead */
              || (0 == (polldesc.in_flags & polldesc.out_flags))) {
            PR_NOT_REACHED("Whoa!");
            break;
          }
        } else {
          break;
        }
      } while (bytes_sent < bytes_read);
      PR_ASSERT(bytes_read == bytes_sent);
      if (verbosity > chatty) {
        PR_fprintf(logFile, "Server sent %d bytes\n", bytes_sent);
      }
    }
  } while (0 != bytes_read);

  if (verbosity > quiet) {
    PR_fprintf(logFile, "Server shutting down stack\n");
  }
  rv = PR_Shutdown(service, PR_SHUTDOWN_BOTH);
  PR_ASSERT(PR_SUCCESS == rv);
  rv = PR_Close(service);
  PR_ASSERT(PR_SUCCESS == rv);

} /* Server */

static PRStatus PR_CALLBACK MyClose(PRFileDesc* fd) {
  PR_DELETE(fd->secret); /* manage my secret file object */
  return (PR_GetDefaultIOMethods())->close(fd); /* let him do all the work */
} /* MyClose */

static PRInt16 PR_CALLBACK MyPoll(PRFileDesc* fd, PRInt16 in_flags,
                                  PRInt16* out_flags) {
  PRInt16 my_flags, new_flags;
  PRFilePrivate* mine = (PRFilePrivate*)fd->secret;
  if (0 != (PR_POLL_READ & in_flags)) {
    /* client thinks he's reading */
    switch (mine->rcvstate) {
      case rcv_send_credit:
        my_flags = (in_flags & ~PR_POLL_READ) | PR_POLL_WRITE;
        break;
      case rcv_data:
      case rcv_get_debit:
        my_flags = in_flags;
      default:
        break;
    }
  } else if (0 != (PR_POLL_WRITE & in_flags)) {
    /* client thinks he's writing */
    switch (mine->xmtstate) {
      case xmt_recv_credit:
        my_flags = (in_flags & ~PR_POLL_WRITE) | PR_POLL_READ;
        break;
      case xmt_send_debit:
      case xmt_data:
        my_flags = in_flags;
      default:
        break;
    }
  } else {
    PR_NOT_REACHED("How'd I get here?");
  }
  new_flags = (fd->lower->methods->poll)(fd->lower, my_flags, out_flags);
  if (verbosity > chatty)
    PR_fprintf(logFile, "Poll [i: 0x%x, m: 0x%x, o: 0x%x, n: 0x%x]\n", in_flags,
               my_flags, *out_flags, new_flags);
  return new_flags;
} /* MyPoll */

static PRFileDesc* PR_CALLBACK MyAccept(PRFileDesc* fd, PRNetAddr* addr,
                                        PRIntervalTime timeout) {
  PRStatus rv;
  PRFileDesc *newfd, *layer = fd;
  PRFileDesc* newstack;
  PRFilePrivate* newsecret;

  PR_ASSERT(fd != NULL);
  PR_ASSERT(fd->lower != NULL);

  newstack = PR_NEW(PRFileDesc);
  if (NULL == newstack) {
    PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
    return NULL;
  }
  newsecret = PR_NEW(PRFilePrivate);
  if (NULL == newsecret) {
    PR_DELETE(newstack);
    PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
    return NULL;
  }
  *newstack = *fd; /* make a copy of the accepting layer */
  *newsecret = *fd->secret;
  newstack->secret = newsecret;

  newfd = (fd->lower->methods->accept)(fd->lower, addr, timeout);
  if (NULL == newfd) {
    PR_DELETE(newsecret);
    PR_DELETE(newstack);
    return NULL;
  }

  /* this PR_PushIOLayer call cannot fail */
  rv = PR_PushIOLayer(newfd, PR_TOP_IO_LAYER, newstack);
  PR_ASSERT(PR_SUCCESS == rv);
  return newfd; /* that's it */
}

static PRInt32 PR_CALLBACK MyRecv(PRFileDesc* fd, void* buf, PRInt32 amount,
                                  PRIntn flags, PRIntervalTime timeout) {
  char* b;
  PRInt32 rv;
  PRFileDesc* lo = fd->lower;
  PRFilePrivate* mine = (PRFilePrivate*)fd->secret;

  do {
    switch (mine->rcvstate) {
      case rcv_get_debit:
        b = (char*)&mine->rcvreq;
        mine->rcvreq = amount;
        rv = lo->methods->recv(lo, b + mine->rcvinprogress,
                               sizeof(mine->rcvreq) - mine->rcvinprogress,
                               flags, timeout);
        if (0 == rv) {
          goto closed;
        }
        if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          break;
        }
        mine->rcvinprogress += rv; /* accumulate the read */
        if (mine->rcvinprogress < sizeof(mine->rcvreq)) {
          break; /* loop */
        }
        mine->rcvstate = rcv_send_credit;
        mine->rcvinprogress = 0;
      case rcv_send_credit:
        b = (char*)&mine->rcvreq;
        rv = lo->methods->send(lo, b + mine->rcvinprogress,
                               sizeof(mine->rcvreq) - mine->rcvinprogress,
                               flags, timeout);
        if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          break;
        }
        mine->rcvinprogress += rv; /* accumulate the read */
        if (mine->rcvinprogress < sizeof(mine->rcvreq)) {
          break; /* loop */
        }
        mine->rcvstate = rcv_data;
        mine->rcvinprogress = 0;
      case rcv_data:
        b = (char*)buf;
        rv = lo->methods->recv(lo, b + mine->rcvinprogress,
                               mine->rcvreq - mine->rcvinprogress, flags,
                               timeout);
        if (0 == rv) {
          goto closed;
        }
        if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          break;
        }
        mine->rcvinprogress += rv; /* accumulate the read */
        if (mine->rcvinprogress < amount) {
          break; /* loop */
        }
        mine->rcvstate = rcv_get_debit;
        mine->rcvinprogress = 0;
        return mine->rcvreq; /* << -- that's it! */
      default:
        break;
    }
  } while (-1 != rv);
  return rv;
closed:
  mine->rcvinprogress = 0;
  mine->rcvstate = rcv_get_debit;
  return 0;
} /* MyRecv */

static PRInt32 PR_CALLBACK MySend(PRFileDesc* fd, const void* buf,
                                  PRInt32 amount, PRIntn flags,
                                  PRIntervalTime timeout) {
  char* b;
  PRInt32 rv;
  PRFileDesc* lo = fd->lower;
  PRFilePrivate* mine = (PRFilePrivate*)fd->secret;

  do {
    switch (mine->xmtstate) {
      case xmt_send_debit:
        b = (char*)&mine->xmtreq;
        mine->xmtreq = amount;
        rv = lo->methods->send(lo, b - mine->xmtinprogress,
                               sizeof(mine->xmtreq) - mine->xmtinprogress,
                               flags, timeout);
        if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          break;
        }
        mine->xmtinprogress += rv;
        if (mine->xmtinprogress < sizeof(mine->xmtreq)) {
          break;
        }
        mine->xmtstate = xmt_recv_credit;
        mine->xmtinprogress = 0;
      case xmt_recv_credit:
        b = (char*)&mine->xmtreq;
        rv = lo->methods->recv(lo, b + mine->xmtinprogress,
                               sizeof(mine->xmtreq) - mine->xmtinprogress,
                               flags, timeout);
        if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          break;
        }
        mine->xmtinprogress += rv;
        if (mine->xmtinprogress < sizeof(mine->xmtreq)) {
          break;
        }
        mine->xmtstate = xmt_data;
        mine->xmtinprogress = 0;
      case xmt_data:
        b = (char*)buf;
        rv = lo->methods->send(lo, b + mine->xmtinprogress,
                               mine->xmtreq - mine->xmtinprogress, flags,
                               timeout);
        if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) {
          break;
        }
        mine->xmtinprogress += rv;
        if (mine->xmtinprogress < amount) {
          break;
        }
        mine->xmtstate = xmt_send_debit;
        mine->xmtinprogress = 0;
        return mine->xmtreq; /* <<-- That's the one! */
      default:
        break;
    }
  } while (-1 != rv);
  return rv;
} /* MySend */

static Verbosity ChangeVerbosity(Verbosity verbosity, PRIntn delta) {
  PRIntn verbage = (PRIntn)verbosity + delta;
  if (verbage < (PRIntn)silent) {
    verbage = (PRIntn)silent;
  } else if (verbage > (PRIntn)noisy) {
    verbage = (PRIntn)noisy;
  }
  return (Verbosity)verbage;
} /* ChangeVerbosity */

int main(int argc, char** argv) {
  PRStatus rv;
  PLOptStatus os;
  PRFileDesc *client, *service;
  PRNetAddr any_address;
  const char* server_name = NULL;
  const PRIOMethods* stubMethods;
  PRThread *client_thread, *server_thread;
  PRThreadScope thread_scope = PR_LOCAL_THREAD;
  PRSocketOptionData socket_noblock, socket_nodelay;
  PLOptState* opt = PL_CreateOptState(argc, argv, "dqGC:c:p:");
  while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
    if (PL_OPT_BAD == os) {
      continue;
    }
    switch (opt->option) {
      case 0:
        server_name = opt->value;
        break;
      case 'd': /* debug mode */
        if (verbosity < noisy) {
          verbosity = ChangeVerbosity(verbosity, 1);
        }
        break;
      case 'q': /* debug mode */
        if (verbosity > silent) {
          verbosity = ChangeVerbosity(verbosity, -1);
        }
        break;
      case 'G': /* use global threads */
        thread_scope = PR_GLOBAL_THREAD;
        break;
      case 'C': /* number of threads waiting */
        major_iterations = atoi(opt->value);
        break;
      case 'c': /* number of client threads */
        minor_iterations = atoi(opt->value);
        break;
      case 'p': /* default port */
        default_port = atoi(opt->value);
        break;
      default:
        break;
    }
  }
  PL_DestroyOptState(opt);

  logFile = PR_GetSpecialFD(PR_StandardError);
  identity = PR_GetUniqueIdentity("Dummy");
  stubMethods = PR_GetDefaultIOMethods();

  /*
  ** The protocol we're going to implement is one where in order to initiate
  ** a send, the sender must first solicit permission. Therefore, every
  ** send is really a send - receive - send sequence.
  */
  myMethods = *stubMethods;    /* first get the entire batch */
  myMethods.accept = MyAccept; /* then override the ones we care about */
  myMethods.recv = MyRecv;     /* then override the ones we care about */
  myMethods.send = MySend;     /* then override the ones we care about */
  myMethods.close = MyClose;   /* then override the ones we care about */
  myMethods.poll = MyPoll;     /* then override the ones we care about */

  if (NULL == server_name)
    rv = PR_InitializeNetAddr(PR_IpAddrLoopback, default_port, &server_address);
  else {
    rv = PR_StringToNetAddr(server_name, &server_address);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_InitializeNetAddr(PR_IpAddrNull, default_port, &server_address);
  }
  PR_ASSERT(PR_SUCCESS == rv);

  socket_noblock.value.non_blocking = PR_TRUE;
  socket_noblock.option = PR_SockOpt_Nonblocking;
  socket_nodelay.value.no_delay = PR_TRUE;
  socket_nodelay.option = PR_SockOpt_NoDelay;

  /* one type w/o layering */

  while (major_iterations-- > 0) {
    if (verbosity > silent) {
      PR_fprintf(logFile, "Beginning non-layered test\n");
    }

    client = PR_NewTCPSocket();
    PR_ASSERT(NULL != client);
    service = PR_NewTCPSocket();
    PR_ASSERT(NULL != service);

    rv = PR_SetSocketOption(client, &socket_noblock);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_SetSocketOption(service, &socket_noblock);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_SetSocketOption(client, &socket_nodelay);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_SetSocketOption(service, &socket_nodelay);
    PR_ASSERT(PR_SUCCESS == rv);

    rv = PR_InitializeNetAddr(PR_IpAddrAny, default_port, &any_address);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_Bind(service, &any_address);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_Listen(service, 10);
    PR_ASSERT(PR_SUCCESS == rv);

    server_thread =
        PR_CreateThread(PR_USER_THREAD, Server, service, PR_PRIORITY_HIGH,
                        thread_scope, PR_JOINABLE_THREAD, 16 * 1024);
    PR_ASSERT(NULL != server_thread);

    client_thread =
        PR_CreateThread(PR_USER_THREAD, Client, client, PR_PRIORITY_NORMAL,
                        thread_scope, PR_JOINABLE_THREAD, 16 * 1024);
    PR_ASSERT(NULL != client_thread);

    rv = PR_JoinThread(client_thread);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_JoinThread(server_thread);
    PR_ASSERT(PR_SUCCESS == rv);

    rv = PR_Close(client);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_Close(service);
    PR_ASSERT(PR_SUCCESS == rv);
    if (verbosity > silent) {
      PR_fprintf(logFile, "Ending non-layered test\n");
    }

    /* with layering */
    if (verbosity > silent) {
      PR_fprintf(logFile, "Beginning layered test\n");
    }
    client = PR_NewTCPSocket();
    PR_ASSERT(NULL != client);
    service = PR_NewTCPSocket();
    PR_ASSERT(NULL != service);

    rv = PR_SetSocketOption(client, &socket_noblock);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_SetSocketOption(service, &socket_noblock);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_SetSocketOption(client, &socket_nodelay);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_SetSocketOption(service, &socket_nodelay);
    PR_ASSERT(PR_SUCCESS == rv);

    PushLayer(client);
    PushLayer(service);

    rv = PR_InitializeNetAddr(PR_IpAddrAny, default_port, &any_address);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_Bind(service, &any_address);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_Listen(service, 10);
    PR_ASSERT(PR_SUCCESS == rv);

    server_thread =
        PR_CreateThread(PR_USER_THREAD, Server, service, PR_PRIORITY_HIGH,
                        thread_scope, PR_JOINABLE_THREAD, 16 * 1024);
    PR_ASSERT(NULL != server_thread);

    client_thread =
        PR_CreateThread(PR_USER_THREAD, Client, client, PR_PRIORITY_NORMAL,
                        thread_scope, PR_JOINABLE_THREAD, 16 * 1024);
    PR_ASSERT(NULL != client_thread);

    rv = PR_JoinThread(client_thread);
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_JoinThread(server_thread);
    PR_ASSERT(PR_SUCCESS == rv);

    rv = PR_Close(PopLayer(client));
    PR_ASSERT(PR_SUCCESS == rv);
    rv = PR_Close(PopLayer(service));
    PR_ASSERT(PR_SUCCESS == rv);
    if (verbosity > silent) {
      PR_fprintf(logFile, "Ending layered test\n");
    }
  }
  return 0;
} /* main */

/* nblayer.c */