/****************************************************************************
* examples/netloop/lo_main.c
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <fcntl.h>
#include <poll.h>
#include <errno.h>
#include <debug.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include "netloop.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define IOBUFFER_SIZE 80
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lo_client
****************************************************************************/
static int lo_client(void)
{
struct sockaddr_in myaddr;
char outbuf[IOBUFFER_SIZE];
char inbuf[IOBUFFER_SIZE];
int sockfd;
int len;
int nbytessent;
int nbytesrecvd;
int ret;
int i;
#ifdef CONFIG_EXAMPLES_NETLOOP_KEEPALIVE
struct timeval tv;
int value;
#endif
/* Create a new TCP socket */
sockfd = socket(PF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
ret = -errno;
printf("lo_client: socket failure %d\n", ret);
return ret;
}
#ifdef CONFIG_EXAMPLES_NETLOOP_KEEPALIVE
/* Enable TCP KeepAlive */
value = TRUE;
ret = setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &value, sizeof(int));
if (ret < 0)
{
ret = -errno;
fprintf(stderr, "setsockopt(SO_KEEPALIVE) failed: %d\n", ret);
return ret;
}
tv.tv_sec = 5;
tv.tv_usec = 0;
ret = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE,
&tv, sizeof(struct timeval));
if (ret < 0)
{
ret = -errno;
fprintf(stderr, "setsockopt(TCP_KEEPIDLE) failed: %d\n", ret);
return ret;
}
tv.tv_sec = 1;
tv.tv_usec = 0;
ret = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL,
&tv, sizeof(struct timeval));
if (ret < 0)
{
ret = -errno;
fprintf(stderr, "setsockopt(TCP_KEEPIDLE) failed: %d\n", ret);
return ret;
}
value = 3;
ret = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPCNT, &value, sizeof(int));
if (ret < 0)
{
ret = -errno;
fprintf(stderr, "setsockopt(SO_KEEPALIVE) failed: %d\n", ret);
return ret;
}
#endif
/* Connect the socket to the server */
myaddr.sin_family = AF_INET;
myaddr.sin_port = htons(LISTENER_PORT);
myaddr.sin_addr.s_addr = htonl(LO_ADDRESS);
printf("lo_client: Connecting to %08x:%d...\n",
LO_ADDRESS, LISTENER_PORT);
if (connect(sockfd,
(struct sockaddr *)&myaddr, sizeof(struct sockaddr_in)) < 0)
{
ret = -errno;
printf("lo_client: connect failure: %d\n", ret);
goto errout_with_socket;
}
printf("lo_client: Connected\n");
/* Then send and receive messages */
for (i = 0; ; i++)
{
sprintf(outbuf, "Loopback message %d", i);
len = strlen(outbuf);
printf("lo_client: Sending '%s' (%d bytes)\n", outbuf, len);
nbytessent = send(sockfd, outbuf, len, 0);
printf("lo_client: Sent %d bytes\n", nbytessent);
if (nbytessent < 0)
{
ret = -errno;
printf("lo_client: send failed: %d\n", ret);
goto errout_with_socket;
}
else if (nbytessent != len)
{
ret = -EINVAL;
printf("lo_client: Bad send length: %d Expected: %d\n",
nbytessent, len);
goto errout_with_socket;
}
printf("lo_client: Receiving...\n");
nbytesrecvd = recv(sockfd, inbuf, IOBUFFER_SIZE, 0);
if (nbytesrecvd < 0)
{
ret = -errno;
printf("lo_client: recv failed: %d\n", ret);
goto errout_with_socket;
}
else if (nbytesrecvd == 0)
{
ret = -ENOTCONN;
printf("lo_client: The server broke the connections\n");
goto errout_with_socket;
}
inbuf[nbytesrecvd] = '\0';
printf("lo_client: Received '%s' (%d bytes)\n", inbuf, nbytesrecvd);
if (nbytesrecvd != len)
{
ret = -EINVAL;
printf("lo_client: Bad recv length: %d Expected: %d\n",
nbytesrecvd, len);
goto errout_with_socket;
}
else if (memcmp(inbuf, outbuf, len) != 0)
{
ret = -EINVAL;
printf("lo_client: Received outbuf does not match sent outbuf\n");
goto errout_with_socket;
}
#ifdef CONFIG_EXAMPLES_NETLOOP_KEEPALIVE
/* Send four messages, then wait a longer amount of time ...
* longer than:
* TCP_KEEPIDLE + TCP_KEEPINTVL * TCP_KEEPCNT = 5 + 3 * 1 = 8 seconds.
*/
if (i != 0 && (i & 3) == 0)
{
printf("lo_client: Long sleep\n");
sleep(12);
}
else
#endif
{
printf("lo_client: Sleeping\n");
sleep(6);
}
}
close(sockfd);
return 0;
errout_with_socket:
close(sockfd);
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netloop_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
pthread_t tid;
int ret;
/* Start the listeners */
printf("netloop_main: Starting lo_listener thread\n");
ret = pthread_create(&tid, NULL, lo_listener, NULL);
if (ret != 0)
{
printf("netloop_main: Failed to create lo_listener thread: %d\n", ret);
}
/* Run the client */
ret = lo_client();
return 0;
}