/* 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 "nspr.h"
#include "prio.h"
#include "prerror.h"
#include "prlog.h"
#include "prprf.h"
#include "prnetdb.h"
#include "plerror.h"
#include "obsolete/probslet.h"

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

#define NUMBER_ROUNDS 5

#define UNIT_TIME 100 /* unit time in milliseconds */
#define CHUNK_SIZE 10
#undef USE_PR_SELECT /* If defined, we use PR_Select. \
                      * If not defined, use PR_Poll instead. */

#if defined(USE_PR_SELECT)
#  include "pprio.h"
#endif

static void PR_CALLBACK clientThreadFunc(void* arg) {
  PRUintn port = (PRUintn)arg;
  PRFileDesc* sock;
  PRNetAddr addr;
  char buf[CHUNK_SIZE];
  int i;
  PRIntervalTime unitTime = PR_MillisecondsToInterval(UNIT_TIME);
  PRSocketOptionData optval;
  PRStatus retVal;
  PRInt32 nBytes;

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

  addr.inet.family = PR_AF_INET;
  addr.inet.port = PR_htons((PRUint16)port);
  addr.inet.ip = PR_htonl(PR_INADDR_LOOPBACK);
  PR_snprintf(buf, sizeof(buf), "%hu", addr.inet.ip);

  /* time 1 */
  PR_Sleep(unitTime);
  sock = PR_NewTCPSocket();
  optval.option = PR_SockOpt_Nonblocking;
  optval.value.non_blocking = PR_TRUE;
  PR_SetSocketOption(sock, &optval);
  retVal = PR_Connect(sock, &addr, PR_INTERVAL_NO_TIMEOUT);
  if (retVal == PR_FAILURE && PR_GetError() == PR_IN_PROGRESS_ERROR) {
#if !defined(USE_PR_SELECT)
    PRPollDesc pd;
    PRInt32 n;
    fprintf(stderr, "connect: EWOULDBLOCK, good\n");
    pd.fd = sock;
    pd.in_flags = PR_POLL_WRITE;
    n = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
    PR_ASSERT(n == 1);
    PR_ASSERT(pd.out_flags == PR_POLL_WRITE);
#else
    PR_fd_set writeSet;
    PRInt32 n;
    fprintf(stderr, "connect: EWOULDBLOCK, good\n");
    PR_FD_ZERO(&writeSet);
    PR_FD_SET(sock, &writeSet);
    n = PR_Select(0, NULL, &writeSet, NULL, PR_INTERVAL_NO_TIMEOUT);
    PR_ASSERT(n == 1);
    PR_ASSERT(PR_FD_ISSET(sock, &writeSet));
#endif
  }
  printf("client connected\n");
  fflush(stdout);

  /* time 4, 7, 11, etc. */
  for (i = 0; i < NUMBER_ROUNDS; i++) {
    PR_Sleep(3 * unitTime);
    nBytes = PR_Write(sock, buf, sizeof(buf));
    if (nBytes == -1) {
      if (PR_GetError() == PR_WOULD_BLOCK_ERROR) {
        fprintf(stderr, "write: EWOULDBLOCK\n");
        exit(1);
      } else {
        fprintf(stderr, "write: failed\n");
      }
    }
    printf("client sent %d bytes\n", nBytes);
    fflush(stdout);
  }

  PR_Close(sock);
}

static PRIntn PR_CALLBACK RealMain(PRIntn argc, char** argv) {
  PRFileDesc *listenSock, *sock;
  PRUint16 listenPort;
  PRNetAddr addr;
  char buf[CHUNK_SIZE];
  PRThread* clientThread;
  PRInt32 retVal;
  PRSocketOptionData optval;
  PRIntn i;
  PRIntervalTime unitTime = PR_MillisecondsToInterval(UNIT_TIME);

  /* Create a listening socket */
  if ((listenSock = PR_NewTCPSocket()) == NULL) {
    fprintf(stderr, "Can't create a new TCP socket\n");
    exit(1);
  }
  addr.inet.family = PR_AF_INET;
  addr.inet.ip = PR_htonl(PR_INADDR_ANY);
  addr.inet.port = PR_htons(0);
  if (PR_Bind(listenSock, &addr) == PR_FAILURE) {
    fprintf(stderr, "Can't bind socket\n");
    exit(1);
  }
  if (PR_GetSockName(listenSock, &addr) == PR_FAILURE) {
    fprintf(stderr, "PR_GetSockName failed\n");
    exit(1);
  }
  listenPort = PR_ntohs(addr.inet.port);
  if (PR_Listen(listenSock, 5) == PR_FAILURE) {
    fprintf(stderr, "Can't listen on a socket\n");
    exit(1);
  }

  PR_snprintf(buf, sizeof(buf),
              "The server thread is listening on port %hu\n\n", listenPort);
  printf("%s", buf);

  clientThread = PR_CreateThread(PR_USER_THREAD, clientThreadFunc,
                                 (void*)listenPort, PR_PRIORITY_NORMAL,
                                 PR_LOCAL_THREAD, PR_UNJOINABLE_THREAD, 0);
  if (clientThread == NULL) {
    fprintf(stderr, "can't create thread\n");
    exit(1);
  }

  printf("client thread created.\n");

  optval.option = PR_SockOpt_Nonblocking;
  optval.value.non_blocking = PR_TRUE;
  PR_SetSocketOption(listenSock, &optval);
  /* time 0 */
  sock = PR_Accept(listenSock, NULL, PR_INTERVAL_NO_TIMEOUT);
  if (sock != NULL || PR_GetError() != PR_WOULD_BLOCK_ERROR) {
    PL_PrintError("First Accept\n");
    fprintf(stderr, "First PR_Accept() xxx\n");
    exit(1);
  }
  printf("accept: EWOULDBLOCK, good\n");
  fflush(stdout);
  /* time 2 */
  PR_Sleep(2 * unitTime);
  sock = PR_Accept(listenSock, NULL, PR_INTERVAL_NO_TIMEOUT);
  if (sock == NULL) {
    PL_PrintError("Second Accept\n");
    fprintf(stderr, "Second PR_Accept() failed: (%d, %d)\n", PR_GetError(),
            PR_GetOSError());
    exit(1);
  }
  printf("accept: succeeded, good\n");
  fflush(stdout);
  PR_Close(listenSock);

  PR_SetSocketOption(sock, &optval);

  /* time 3, 5, 6, 8, etc. */
  for (i = 0; i < NUMBER_ROUNDS; i++) {
    PR_Sleep(unitTime);
    retVal = PR_Recv(sock, buf, sizeof(buf), 0, PR_INTERVAL_NO_TIMEOUT);
    if (retVal != -1 || PR_GetError() != PR_WOULD_BLOCK_ERROR) {
      PL_PrintError("First Receive:\n");
      fprintf(stderr, "First PR_Recv: retVal: %ld, Error: %ld\n", retVal,
              PR_GetError());
      exit(1);
    }
    printf("read: EWOULDBLOCK, good\n");
    fflush(stdout);
    PR_Sleep(2 * unitTime);
    retVal = PR_Recv(sock, buf, sizeof(buf), 0, PR_INTERVAL_NO_TIMEOUT);
    if (retVal != CHUNK_SIZE) {
      PL_PrintError("Second Receive:\n");
      fprintf(stderr, "Second PR_Recv: retVal: %ld, Error: %ld\n", retVal,
              PR_GetError());
      exit(1);
    }
    printf("read: %d bytes, good\n", retVal);
    fflush(stdout);
  }
  PR_Close(sock);

  printf("All tests finished\n");
  printf("PASS\n");
  return 0;
}

int main(int argc, char** argv) {
  PRIntn rv;

  rv = PR_Initialize(RealMain, argc, argv, 0);
  return rv;
} /* main */