/****************************************************************************
 * apps/examples/nettest/nettest_client.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include "config.h"

#include <sys/socket.h>
#include <netinet/in.h>

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

#include <arpa/inet.h>

#include "nettest.h"

/****************************************************************************
 * Public Functions
 ****************************************************************************/

void nettest_client(void)
{
#ifdef CONFIG_EXAMPLES_NETTEST_IPv6
  struct sockaddr_in6 server;
#else
  struct sockaddr_in server;
#endif
  char *outbuf;
#ifndef CONFIG_EXAMPLES_NETTEST_PERFORMANCE
  char *inbuf;
#endif
  int sockfd;
  socklen_t addrlen;
  int nbytessent;
#ifndef CONFIG_EXAMPLES_NETTEST_PERFORMANCE
  int nbytesrecvd;
  int totalbytesrecvd;
#endif
  int ch;
  int i;

  /* Allocate buffers */

  outbuf = malloc(SENDSIZE);
#ifndef CONFIG_EXAMPLES_NETTEST_PERFORMANCE
  inbuf  = malloc(SENDSIZE);
  if (!outbuf || !inbuf)
#else
  if (!outbuf)
#endif
    {
      printf("client: failed to allocate buffers\n");
      exit(1);
    }

  /* Create a new TCP socket */

  sockfd = socket(PF_INETX, SOCK_STREAM, 0);
  if (sockfd < 0)
    {
      printf("client socket failure %d\n", errno);
      goto errout_with_buffers;
    }

  /* Set up the server address */

#ifdef CONFIG_EXAMPLES_NETTEST_IPv6
  server.sin6_family     = AF_INET6;
  server.sin6_port       = HTONS(CONFIG_EXAMPLES_NETTEST_SERVER_PORTNO);
  memcpy(server.sin6_addr.s6_addr16,
         g_nettestserver_ipv6, 8 * sizeof(uint16_t));
  addrlen                = sizeof(struct sockaddr_in6);

  printf("Connecting to Address: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
         g_nettestserver_ipv6[0], g_nettestserver_ipv6[1],
         g_nettestserver_ipv6[2], g_nettestserver_ipv6[3],
         g_nettestserver_ipv6[4], g_nettestserver_ipv6[5],
         g_nettestserver_ipv6[6], g_nettestserver_ipv6[7]);
#else
  server.sin_family      = AF_INET;
  server.sin_port        = HTONS(CONFIG_EXAMPLES_NETTEST_SERVER_PORTNO);
  server.sin_addr.s_addr = (in_addr_t)g_nettestserver_ipv4;
  addrlen                = sizeof(struct sockaddr_in);

  printf("Connecting to Address: %08lx\n",
         (unsigned long)g_nettestserver_ipv4);
#endif

  /* Connect the socket to the server */

  if (connect(sockfd, (struct sockaddr *)&server, addrlen) < 0)
    {
      printf("client: connect failure: %d\n", errno);
      goto errout_with_socket;
    }

  printf("client: Connected\n");

  /* Initialize the buffer */

  ch = 0x20;
  for (i = 0; i < SENDSIZE; i++ )
    {
      outbuf[i] = ch;
      if (++ch > 0x7e)
        {
          ch = 0x20;
        }
    }

#ifdef CONFIG_EXAMPLES_NETTEST_PERFORMANCE
  /* Then send messages forever */

  for (; ; )
    {
      nbytessent = send(sockfd, outbuf, SENDSIZE, 0);
      if (nbytessent < 0)
        {
          printf("client: send failed: %d\n", errno);
          goto errout_with_socket;
        }
      else if (nbytessent != SENDSIZE)
        {
          printf("client: Bad send length=%d: of %d\n",
                  nbytessent, SENDSIZE);
          goto errout_with_socket;
        }

      printf("Sent %d bytes\n", nbytessent);
    }
#else
  /* Then send and receive one message */

  printf("client: Sending %d bytes\n", SENDSIZE);
  nbytessent = send(sockfd, outbuf, SENDSIZE, 0);
  printf("client: Sent %d bytes\n", nbytessent);

  if (nbytessent < 0)
    {
      printf("client: send failed: %d\n", errno);
      goto errout_with_socket;
    }
  else if (nbytessent != SENDSIZE)
    {
      printf("client: Bad send length: %d Expected: %d\n",
             nbytessent, SENDSIZE);
      goto errout_with_socket;
    }

  totalbytesrecvd = 0;
  do
    {
      printf("client: Receiving...\n");
      nbytesrecvd = recv(sockfd, &inbuf[totalbytesrecvd],
                         SENDSIZE - totalbytesrecvd, 0);

      if (nbytesrecvd < 0)
        {
          printf("client: recv failed: %d\n", errno);
          goto errout_with_socket;
        }
      else if (nbytesrecvd == 0)
        {
          printf("client: The server closed the connection\n");
          goto errout_with_socket;
        }

      totalbytesrecvd += nbytesrecvd;
      printf("client: Received %d of %d bytes\n", totalbytesrecvd, SENDSIZE);
    }
  while (totalbytesrecvd < SENDSIZE);

  if (totalbytesrecvd != SENDSIZE)
    {
      printf("client: Bad recv length: %d Expected: %d\n",
             totalbytesrecvd, SENDSIZE);
      goto errout_with_socket;
    }
  else if (memcmp(inbuf, outbuf, SENDSIZE) != 0)
    {
      printf("client: Received buffer does not match sent buffer\n");
      goto errout_with_socket;
    }

  printf("client: Terminating\n");
  close(sockfd);
  free(outbuf);
#ifndef CONFIG_EXAMPLES_NETTEST_PERFORMANCE
  free(inbuf);
#endif
  return;
#endif

errout_with_socket:
  close(sockfd);

errout_with_buffers:
  free(outbuf);
#ifndef CONFIG_EXAMPLES_NETTEST_PERFORMANCE
  free(inbuf);
#endif
  exit(1);
}