/****************************************************************************
* examples/tcpblaster/tcpblaster-server.c
*
* Copyright (C) 2018 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 Gregory Nutt 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 "config.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <poll.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <arpa/inet.h>
#include "tcpblaster.h"
/****************************************************************************
* Public Functions
****************************************************************************/
void tcpblaster_server(void)
{
#ifdef CONFIG_EXAMPLES_TCPBLASTER_IPv6
struct sockaddr_in6 myaddr;
#else
struct sockaddr_in myaddr;
#endif
#ifdef TCPBLASTER_HAVE_SOLINGER
struct linger ling;
#endif
struct timespec start;
unsigned long recvtotal;
socklen_t addrlen;
char *buffer;
int groupcount;
int recvcount;
int listensd;
int acceptsd;
int nbytesread;
int optval;
char timebuff[100];
setbuf(stdout, NULL);
/* Allocate a BIG buffer */
buffer = (FAR char *)malloc(SENDSIZE);
if (!buffer)
{
printf("server: failed to allocate buffer\n");
exit(1);
}
/* Create a new TCP socket */
listensd = socket(PF_INETX, SOCK_STREAM, 0);
if (listensd < 0)
{
printf("server: socket failure: %d\n", errno);
goto errout_with_buffer;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(listensd, SOL_SOCKET, SO_REUSEADDR, (FAR void *)&optval,
sizeof(int)) < 0)
{
printf("server: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_listensd;
}
/* Bind the socket to a local address */
#ifdef CONFIG_EXAMPLES_TCPBLASTER_IPv6
myaddr.sin6_family = AF_INET6;
myaddr.sin6_port = HTONS(CONFIG_EXAMPLES_TCPBLASTER_SERVER_PORTNO);
#if defined(CONFIG_EXAMPLES_TCPBLASTER_LOOPBACK) && !defined(CONFIG_NET_LOOPBACK)
memcpy(myaddr.sin6_addr.s6_addr, g_tcpblasterserver_ipv6, 16);
#else
memset(myaddr.sin6_addr.s6_addr, 0, 16);
#endif
addrlen = sizeof(struct sockaddr_in6);
printf("Binding to IPv6 Address: "
"%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
"%02x%02x:%02x%02x:%02x%02x:%02x%02x\n",
myaddr.sin6_addr.s6_addr[0], myaddr.sin6_addr.s6_addr[1],
myaddr.sin6_addr.s6_addr[2], myaddr.sin6_addr.s6_addr[3],
myaddr.sin6_addr.s6_addr[4], myaddr.sin6_addr.s6_addr[5],
myaddr.sin6_addr.s6_addr[6], myaddr.sin6_addr.s6_addr[7],
myaddr.sin6_addr.s6_addr[8], myaddr.sin6_addr.s6_addr[9],
myaddr.sin6_addr.s6_addr[10], myaddr.sin6_addr.s6_addr[11],
myaddr.sin6_addr.s6_addr[12], myaddr.sin6_addr.s6_addr[13],
myaddr.sin6_addr.s6_addr[14], myaddr.sin6_addr.s6_addr[15]);
#else
myaddr.sin_family = AF_INET;
myaddr.sin_port = HTONS(CONFIG_EXAMPLES_TCPBLASTER_SERVER_PORTNO);
#if defined(CONFIG_EXAMPLES_TCPBLASTER_LOOPBACK) && !defined(CONFIG_NET_LOOPBACK)
myaddr.sin_addr.s_addr = (in_addr_t)g_tcpblasterserver_ipv4;
#else
myaddr.sin_addr.s_addr = INADDR_ANY;
#endif
addrlen = sizeof(struct sockaddr_in);
printf("Binding to IPv4 Address: %08lx\n",
(unsigned long)myaddr.sin_addr.s_addr);
#endif
if (bind(listensd, (FAR struct sockaddr *)&myaddr, addrlen) < 0)
{
printf("server: bind failure: %d\n", errno);
goto errout_with_listensd;
}
/* Listen for connections on the bound TCP socket */
if (listen(listensd, 5) < 0)
{
printf("server: listen failure %d\n", errno);
goto errout_with_listensd;
}
/* Accept only one connection */
printf("server: Accepting connections on port %d\n",
CONFIG_EXAMPLES_TCPBLASTER_SERVER_PORTNO);
acceptsd = accept(listensd, (FAR struct sockaddr *)&myaddr, &addrlen);
if (acceptsd < 0)
{
printf("server: accept failure: %d\n", errno);
goto errout_with_listensd;
}
printf("server: Connection accepted -- receiving\n");
/* Configure to "linger" until all data is sent when the socket is closed */
#ifdef TCPBLASTER_HAVE_SOLINGER
ling.l_onoff = 1;
ling.l_linger = 30; /* timeout is seconds */
if (setsockopt(acceptsd, SOL_SOCKET, SO_LINGER, &ling, sizeof(ling)) < 0)
{
printf("server: setsockopt SO_LINGER failure: %d\n", errno);
goto errout_with_acceptsd;
}
#endif
/* Then receive data forever */
recvcount = 0;
recvtotal = 0;
groupcount = 0;
clock_gettime(CLOCK_REALTIME, &start);
for (; ; )
{
#ifdef CONFIG_EXAMPLES_TCPBLASTER_POLLIN
struct pollfd fds[1];
int ret;
memset(fds, 0, 1 * sizeof(struct pollfd));
fds[0].fd = acceptsd;
fds[0].events = POLLIN | POLLHUP;
/* Wait until we can receive data or until the connection is lost */
ret = poll(fds, 1, -1);
if (ret < 0)
{
printf("server: ERROR poll failed: %d\n", errno);
goto errout_with_acceptsd;
}
if ((fds[0].revents & POLLHUP) != 0)
{
printf("server: WARNING poll returned POLLHUP\n");
goto errout_with_acceptsd;
}
#endif
nbytesread = recv(acceptsd, buffer, SENDSIZE, 0);
if (nbytesread < 0)
{
printf("server: recv failed: %d\n", errno);
goto errout_with_acceptsd;
}
else if (nbytesread == 0)
{
printf("server: The client broke the connection\n");
goto errout_with_acceptsd;
}
recvtotal += nbytesread;
if (++recvcount >= GROUPSIZE)
{
struct timespec elapsed;
struct timespec curr;
float fkbsent;
float felapsed;
clock_gettime(CLOCK_REALTIME, &curr);
elapsed.tv_sec = curr.tv_sec - start.tv_sec;
if (curr.tv_nsec >= start.tv_nsec)
{
elapsed.tv_nsec = curr.tv_nsec - start.tv_nsec;
}
else
{
unsigned long borrow = 1000000000 - start.tv_nsec;
elapsed.tv_sec--;
elapsed.tv_nsec = curr.tv_nsec + borrow;
}
strftime(timebuff, 100,
"%Y-%m-%d %H:%M:%S.000", localtime(&curr.tv_sec));
fkbsent = recvtotal / 1024.0f;
felapsed = elapsed.tv_sec + elapsed.tv_nsec / 1000000000.0f;
printf("[%s] %d: Received %d buffers: %7.1f KB (buffer average"
"size: %5.1f KB) in %6.2f seconds (%7.1f KB/second)\n",
timebuff, groupcount, recvcount, fkbsent,
fkbsent / recvcount, felapsed, fkbsent / felapsed);
recvcount = 0;
recvtotal = 0;
groupcount++;
clock_gettime(CLOCK_REALTIME, &start);
}
}
errout_with_acceptsd:
close(acceptsd);
errout_with_listensd:
close(listensd);
errout_with_buffer:
free(buffer);
exit(1);
}