/* 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/. */

/*
 * A test case for the PR_MSG_PEEK flag of PR_Recv().
 *
 * Test both blocking and non-blocking sockets.
 */

#include "nspr.h"

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

#define BUFFER_SIZE 1024

static int iterations = 10;

/*
 * In iteration i, recv_amount[i] is the number of bytes we
 * wish to receive, and send_amount[i] is the number of bytes
 * we actually send.  Therefore, the number of elements in the
 * recv_amount or send_amount array should equal to 'iterations'.
 * For this test to pass we need to ensure that
 *     recv_amount[i] <= BUFFER_SIZE,
 *     send_amount[i] <= BUFFER_SIZE,
 *     send_amount[i] <= recv_amount[i].
 */
static PRInt32 recv_amount[10] = {16,  128, 256, 1024, 512,
                                  512, 128, 256, 32,   32};
static PRInt32 send_amount[10] = {16, 64, 128, 1024, 512, 256, 128, 64, 16, 32};

/* Blocking I/O */
static void ServerB(void* arg) {
  PRFileDesc* listenSock = (PRFileDesc*)arg;
  PRFileDesc* sock;
  char buf[BUFFER_SIZE];
  PRInt32 nbytes;
  int i;
  int j;

  sock = PR_Accept(listenSock, NULL, PR_INTERVAL_NO_TIMEOUT);
  if (NULL == sock) {
    fprintf(stderr, "PR_Accept failed\n");
    exit(1);
  }

  for (i = 0; i < iterations; i++) {
    memset(buf, 0, sizeof(buf));
    nbytes =
        PR_Recv(sock, buf, recv_amount[i], PR_MSG_PEEK, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == nbytes) {
      fprintf(stderr, "PR_Recv failed\n");
      exit(1);
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Recv returned %d, absurd!\n", nbytes);
      exit(1);
    }
    for (j = 0; j < nbytes; j++) {
      if (buf[j] != 2 * i) {
        fprintf(stderr, "byte %d should be %d but is %d\n", j, 2 * i, buf[j]);
        exit(1);
      }
    }
    fprintf(stderr, "server: peeked expected data\n");

    memset(buf, 0, sizeof(buf));
    nbytes =
        PR_Recv(sock, buf, recv_amount[i], PR_MSG_PEEK, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == nbytes) {
      fprintf(stderr, "PR_Recv failed\n");
      exit(1);
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Recv returned %d, absurd!\n", nbytes);
      exit(1);
    }
    for (j = 0; j < nbytes; j++) {
      if (buf[j] != 2 * i) {
        fprintf(stderr, "byte %d should be %d but is %d\n", j, 2 * i, buf[j]);
        exit(1);
      }
    }
    fprintf(stderr, "server: peeked expected data\n");

    memset(buf, 0, sizeof(buf));
    nbytes = PR_Recv(sock, buf, recv_amount[i], 0, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == nbytes) {
      fprintf(stderr, "PR_Recv failed\n");
      exit(1);
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Recv returned %d, absurd!\n", nbytes);
      exit(1);
    }
    for (j = 0; j < nbytes; j++) {
      if (buf[j] != 2 * i) {
        fprintf(stderr, "byte %d should be %d but is %d\n", j, 2 * i, buf[j]);
        exit(1);
      }
    }
    fprintf(stderr, "server: received expected data\n");

    PR_Sleep(PR_SecondsToInterval(1));
    memset(buf, 2 * i + 1, send_amount[i]);
    nbytes = PR_Send(sock, buf, send_amount[i], 0, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == nbytes) {
      fprintf(stderr, "PR_Send failed\n");
      exit(1);
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Send returned %d, absurd!\n", nbytes);
      exit(1);
    }
  }
  if (PR_Close(sock) == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
}

/* Non-blocking I/O */
static void ClientNB(void* arg) {
  PRFileDesc* sock;
  PRSocketOptionData opt;
  PRUint16 port = (PRUint16)arg;
  PRNetAddr addr;
  char buf[BUFFER_SIZE];
  PRPollDesc pd;
  PRInt32 npds;
  PRInt32 nbytes;
  int i;
  int j;

  sock = PR_OpenTCPSocket(PR_AF_INET6);
  if (NULL == sock) {
    fprintf(stderr, "PR_OpenTCPSocket failed\n");
    exit(1);
  }
  opt.option = PR_SockOpt_Nonblocking;
  opt.value.non_blocking = PR_TRUE;
  if (PR_SetSocketOption(sock, &opt) == PR_FAILURE) {
    fprintf(stderr, "PR_SetSocketOption failed\n");
    exit(1);
  }
  memset(&addr, 0, sizeof(addr));
  if (PR_SetNetAddr(PR_IpAddrLoopback, PR_AF_INET6, port, &addr) ==
      PR_FAILURE) {
    fprintf(stderr, "PR_SetNetAddr failed\n");
    exit(1);
  }
  if (PR_Connect(sock, &addr, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) {
    if (PR_GetError() != PR_IN_PROGRESS_ERROR) {
      fprintf(stderr, "PR_Connect failed\n");
      exit(1);
    }
    pd.fd = sock;
    pd.in_flags = PR_POLL_WRITE | PR_POLL_EXCEPT;
    npds = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == npds) {
      fprintf(stderr, "PR_Poll failed\n");
      exit(1);
    }
    if (1 != npds) {
      fprintf(stderr, "PR_Poll returned %d, absurd!\n", npds);
      exit(1);
    }
    if (PR_GetConnectStatus(&pd) == PR_FAILURE) {
      fprintf(stderr, "PR_GetConnectStatus failed\n");
      exit(1);
    }
  }

  for (i = 0; i < iterations; i++) {
    PR_Sleep(PR_SecondsToInterval(1));
    memset(buf, 2 * i, send_amount[i]);
    while ((nbytes = PR_Send(sock, buf, send_amount[i], 0,
                             PR_INTERVAL_NO_TIMEOUT)) == -1) {
      if (PR_GetError() != PR_WOULD_BLOCK_ERROR) {
        fprintf(stderr, "PR_Send failed\n");
        exit(1);
      }
      pd.fd = sock;
      pd.in_flags = PR_POLL_WRITE;
      npds = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
      if (-1 == npds) {
        fprintf(stderr, "PR_Poll failed\n");
        exit(1);
      }
      if (1 != npds) {
        fprintf(stderr, "PR_Poll returned %d, absurd!\n", npds);
        exit(1);
      }
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Send returned %d, absurd!\n", nbytes);
      exit(1);
    }

    memset(buf, 0, sizeof(buf));
    while ((nbytes = PR_Recv(sock, buf, recv_amount[i], PR_MSG_PEEK,
                             PR_INTERVAL_NO_TIMEOUT)) == -1) {
      if (PR_GetError() != PR_WOULD_BLOCK_ERROR) {
        fprintf(stderr, "PR_Recv failed\n");
        exit(1);
      }
      pd.fd = sock;
      pd.in_flags = PR_POLL_READ;
      npds = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
      if (-1 == npds) {
        fprintf(stderr, "PR_Poll failed\n");
        exit(1);
      }
      if (1 != npds) {
        fprintf(stderr, "PR_Poll returned %d, absurd!\n", npds);
        exit(1);
      }
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Recv returned %d, absurd!\n", nbytes);
      exit(1);
    }
    for (j = 0; j < nbytes; j++) {
      if (buf[j] != 2 * i + 1) {
        fprintf(stderr, "byte %d should be %d but is %d\n", j, 2 * i + 1,
                buf[j]);
        exit(1);
      }
    }
    fprintf(stderr, "client: peeked expected data\n");

    memset(buf, 0, sizeof(buf));
    nbytes =
        PR_Recv(sock, buf, recv_amount[i], PR_MSG_PEEK, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == nbytes) {
      fprintf(stderr, "PR_Recv failed\n");
      exit(1);
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Recv returned %d, absurd!\n", nbytes);
      exit(1);
    }
    for (j = 0; j < nbytes; j++) {
      if (buf[j] != 2 * i + 1) {
        fprintf(stderr, "byte %d should be %d but is %d\n", j, 2 * i + 1,
                buf[j]);
        exit(1);
      }
    }
    fprintf(stderr, "client: peeked expected data\n");

    memset(buf, 0, sizeof(buf));
    nbytes = PR_Recv(sock, buf, recv_amount[i], 0, PR_INTERVAL_NO_TIMEOUT);
    if (-1 == nbytes) {
      fprintf(stderr, "PR_Recv failed\n");
      exit(1);
    }
    if (send_amount[i] != nbytes) {
      fprintf(stderr, "PR_Recv returned %d, absurd!\n", nbytes);
      exit(1);
    }
    for (j = 0; j < nbytes; j++) {
      if (buf[j] != 2 * i + 1) {
        fprintf(stderr, "byte %d should be %d but is %d\n", j, 2 * i + 1,
                buf[j]);
        exit(1);
      }
    }
    fprintf(stderr, "client: received expected data\n");
  }
  if (PR_Close(sock) == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
}

static void RunTest(PRThreadScope scope, PRFileDesc* listenSock,
                    PRUint16 port) {
  PRThread *server, *client;

  server = PR_CreateThread(PR_USER_THREAD, ServerB, listenSock,
                           PR_PRIORITY_NORMAL, scope, PR_JOINABLE_THREAD, 0);
  if (NULL == server) {
    fprintf(stderr, "PR_CreateThread failed\n");
    exit(1);
  }
  client = PR_CreateThread(PR_USER_THREAD, ClientNB, (void*)port,
                           PR_PRIORITY_NORMAL, scope, PR_JOINABLE_THREAD, 0);
  if (NULL == client) {
    fprintf(stderr, "PR_CreateThread failed\n");
    exit(1);
  }

  if (PR_JoinThread(server) == PR_FAILURE) {
    fprintf(stderr, "PR_JoinThread failed\n");
    exit(1);
  }
  if (PR_JoinThread(client) == PR_FAILURE) {
    fprintf(stderr, "PR_JoinThread failed\n");
    exit(1);
  }
}

int main(int argc, char** argv) {
  PRFileDesc* listenSock;
  PRNetAddr addr;
  PRUint16 port;

  listenSock = PR_OpenTCPSocket(PR_AF_INET6);
  if (NULL == listenSock) {
    fprintf(stderr, "PR_OpenTCPSocket failed\n");
    exit(1);
  }
  memset(&addr, 0, sizeof(addr));
  if (PR_SetNetAddr(PR_IpAddrAny, PR_AF_INET6, 0, &addr) == PR_FAILURE) {
    fprintf(stderr, "PR_SetNetAddr failed\n");
    exit(1);
  }
  if (PR_Bind(listenSock, &addr) == PR_FAILURE) {
    fprintf(stderr, "PR_Bind failed\n");
    exit(1);
  }
  if (PR_GetSockName(listenSock, &addr) == PR_FAILURE) {
    fprintf(stderr, "PR_GetSockName failed\n");
    exit(1);
  }
  port = PR_ntohs(addr.ipv6.port);
  if (PR_Listen(listenSock, 5) == PR_FAILURE) {
    fprintf(stderr, "PR_Listen failed\n");
    exit(1);
  }

  fprintf(stderr, "Running the test with local threads\n");
  RunTest(PR_LOCAL_THREAD, listenSock, port);
  fprintf(stderr, "Running the test with global threads\n");
  RunTest(PR_GLOBAL_THREAD, listenSock, port);

  if (PR_Close(listenSock) == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
  printf("PASS\n");
  return 0;
}