/****************************************************************************
* examples/ustream/ustream_server.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 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 <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <poll.h>
#include "ustream.h"
/****************************************************************************
* Public Functions
****************************************************************************/
#ifdef BUILD_MODULE
int main(int argc, FAR char *argv[])
#else
int server_main(int argc, char *argv[])
#endif
{
#ifdef CONFIG_EXAMPLES_USTREAM_USE_POLL
struct pollfd pfd;
#endif
struct sockaddr_un myaddr;
socklen_t addrlen;
FAR char *buffer;
int listensd;
int acceptsd;
int nbytesread;
int totalbytesread;
int nbytessent;
int ch;
int ret;
int i;
/* Allocate a BIG buffer */
buffer = (char*)malloc(2*SENDSIZE);
if (!buffer)
{
printf("server: failed to allocate buffer\n");
exit(1);
}
/* Create a new Unix domain socket */
listensd = socket(PF_LOCAL, SOCK_STREAM, 0);
if (listensd < 0)
{
printf("server: socket failure: %d\n", errno);
goto errout_with_buffer;
}
/* Bind the socket to a local address */
addrlen = strlen(CONFIG_EXAMPLES_USTREAM_ADDR);
if (addrlen > UNIX_PATH_MAX - 1)
{
addrlen = UNIX_PATH_MAX - 1;
}
myaddr.sun_family = AF_LOCAL;
strncpy(myaddr.sun_path, CONFIG_EXAMPLES_USTREAM_ADDR, addrlen);
myaddr.sun_path[addrlen] = '\0';
addrlen += sizeof(sa_family_t) + 1;
ret = bind(listensd, (struct sockaddr*)&myaddr, addrlen);
if (ret < 0)
{
printf("server: bind failure: %d\n", errno);
goto errout_with_listensd;
}
/* Listen for connections on the bound socket */
printf("server: Accepting connections on %s ...\n", CONFIG_EXAMPLES_USTREAM_ADDR);
if (listen(listensd, 5) < 0)
{
printf("server: listen failure %d\n", errno);
goto errout_with_listensd;
}
/* Accept only one connection */
#ifdef CONFIG_EXAMPLES_USTREAM_USE_POLL
memset(&pfd, 0, sizeof(pfd));
pfd.fd = listensd;
pfd.events = POLLIN;
ret = poll(&pfd, 1, -1);
if (ret < 0)
{
printf("server: poll failure: %d\n", errno);
goto errout_with_listensd;
}
else if (ret == 0)
{
printf("server: poll failure: returned zero\n");
goto errout_with_listensd;
}
else if (!(pfd.revents & POLLIN))
{
printf("server: poll failure: no POLLIN\n");
goto errout_with_listensd;
}
#endif
acceptsd = accept(listensd, (struct sockaddr*)&myaddr, &addrlen);
if (acceptsd < 0)
{
printf("server: accept failure: %d\n", errno);
goto errout_with_listensd;
}
printf("server: Connection accepted -- receiving\n");
/* Receive canned message */
totalbytesread = 0;
while (totalbytesread < SENDSIZE)
{
#ifdef CONFIG_EXAMPLES_USTREAM_USE_POLL
memset(&pfd, 0, sizeof(pfd));
pfd.fd = acceptsd;
pfd.events = POLLIN;
ret = poll(&pfd, 1, -1);
if (ret < 0)
{
printf("server: recv-poll failed: %d\n", errno);
goto errout_with_acceptsd;
}
else if (ret == 0)
{
printf("server: recv-poll failed: returned zero\n");
goto errout_with_acceptsd;
}
else if (!(pfd.revents & POLLIN))
{
printf("server: recv-poll failed: no POLLIN\n");
goto errout_with_acceptsd;
}
#endif
printf("server: Reading...\n");
nbytesread = recv(acceptsd, &buffer[totalbytesread], 2*SENDSIZE - totalbytesread, 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;
}
totalbytesread += nbytesread;
printf("server: Received %d of %d bytes\n", totalbytesread, SENDSIZE);
}
/* Verify the message */
if (totalbytesread != SENDSIZE)
{
printf("server: Received %d / Expected %d bytes\n", totalbytesread, SENDSIZE);
goto errout_with_acceptsd;
}
ch = 0x20;
for (i = 0; i < SENDSIZE; i++ )
{
if (buffer[i] != ch)
{
printf("server: Byte %d is %02x / Expected %02x\n", i, buffer[i], ch);
goto errout_with_acceptsd;
}
if (++ch > 0x7e)
{
ch = 0x20;
}
}
/* Then send the same data back to the client */
#ifdef CONFIG_EXAMPLES_USTREAM_USE_POLL
memset(&pfd, 0, sizeof(pfd));
pfd.fd = acceptsd;
pfd.events = POLLOUT;
ret = poll(&pfd, 1, -1);
if (ret < 0)
{
printf("server: send-poll failed: %d\n", errno);
goto errout_with_acceptsd;
}
else if (ret == 0)
{
printf("server: send-poll failed: returned zero\n");
goto errout_with_acceptsd;
}
else if (!(pfd.revents & POLLOUT))
{
printf("server: send-poll failed: no POLLOUT\n");
goto errout_with_acceptsd;
}
#endif
printf("server: Sending %d bytes\n", totalbytesread);
nbytessent = send(acceptsd, buffer, totalbytesread, 0);
if (nbytessent <= 0)
{
printf("server: send failed: %d\n", errno);
goto errout_with_acceptsd;
}
printf("server: Sent %d bytes\n", nbytessent);
printf("server: Terminating\n");
close(listensd);
close(acceptsd);
free(buffer);
return 0;
errout_with_acceptsd:
close(acceptsd);
errout_with_listensd:
close(listensd);
errout_with_buffer:
free(buffer);
return 1;
}