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/****************************************************************************
* examples/bridge/host_main.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
*
* Authors: 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 <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/in.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static uint8_t g_sndmessage[] = MESSAGE;
static uint8_t g_rdbuffer[EXAMPLES_BRIDGE_SEND_IOBUFIZE];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* bridge_main
****************************************************************************/
int main(int argc, char *argv[])
{
struct sockaddr_in receiver;
struct sockaddr_in sender;
struct sockaddr_in fromaddr;
struct sockaddr_in toaddr;
socklen_t addrlen;
in_addr_t tmpaddr;
ssize_t nrecvd;
ssize_t nsent;
int optval;
int recvsd;
int sndsd;
int i;
int j;
/* Create a UDP send socket */
printf(LABEL "Create send socket: IPHOST=%08x PORT=INPORT_ANY\n",
EXAMPLES_BRIDGE_SEND_IPHOST);
sndsd = socket(PF_INET, SOCK_DGRAM, 0);
if (sndsd < 0)
{
fprintf(stderr, LABEL "ERROR: Failed to create send socket: %d\n", errno);
return EXIT_FAILURE;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(sndsd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
{
fprintf(stderr, LABEL "ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_sendsd;
}
/* Bind the socket to a local address */
sender.sin_family = AF_INET;
sender.sin_port = 0;
sender.sin_addr.s_addr = htonl(EXAMPLES_BRIDGE_SEND_IPHOST);
if (bind(sndsd, (struct sockaddr*)&sender, sizeof(struct sockaddr_in)) < 0)
{
printf(LABEL "bind failure: %d\n", errno);
goto errout_with_sendsd;
}
/* Create a UDP receive socket */
printf(LABEL "Create receive socket: IPHOST=%08x RECVPORT=%d\n",
EXAMPLES_BRIDGE_RECV_IPHOST, EXAMPLES_BRIDGE_SEND_HOSTPORT);
recvsd = socket(PF_INET, SOCK_DGRAM, 0);
if (recvsd < 0)
{
fprintf(stderr, LABEL "ERROR: Failed to create receive socket: %d\n", errno);
goto errout_with_sendsd;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(recvsd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
{
fprintf(stderr, LABEL "ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_recvsd;
}
/* Bind the socket to a local address */
receiver.sin_family = AF_INET;
receiver.sin_port = htons(EXAMPLES_BRIDGE_SEND_HOSTPORT);
receiver.sin_addr.s_addr = htonl(EXAMPLES_BRIDGE_RECV_IPHOST);
if (bind(recvsd, (struct sockaddr*)&receiver, sizeof(struct sockaddr_in)) < 0)
{
fprintf(stderr, LABEL "ERROR: bind failure: %d\n", errno);
goto errout_with_recvsd;
}
/* Send a packet */
printf(LABEL "Sending %lu bytes: IPTARGET=%08x PORT=%d\n",
sizeof(g_sndmessage),
EXAMPLES_BRIDGE_RECV_IPADDR, EXAMPLES_BRIDGE_RECV_RECVPORT);
toaddr.sin_family = AF_INET;
toaddr.sin_port = htons(EXAMPLES_BRIDGE_RECV_RECVPORT);
toaddr.sin_addr.s_addr = htonl(EXAMPLES_BRIDGE_RECV_IPADDR);
nsent = sendto(sndsd, g_sndmessage, sizeof(g_sndmessage), 0,
(struct sockaddr*)&toaddr, sizeof(struct sockaddr_in));
/* Check for send errors */
if (nsent < 0)
{
fprintf(stderr, LABEL "ERROR: sendto failed: %d\n", errno);
goto errout_with_recvsd;
}
else if (nsent != sizeof(g_sndmessage))
{
fprintf(stderr, LABEL "ERROR: Bad send length: %ld Expected: %lu\n",
(long)nsent, sizeof(g_sndmessage));
goto errout_with_recvsd;
}
printf(LABEL "Message sent successfully\n");
/* Read a packet */
printf(LABEL "Receiving up to %d bytes\n", EXAMPLES_BRIDGE_SEND_IOBUFIZE);
addrlen = sizeof(struct sockaddr_in);
nrecvd = recvfrom(recvsd, g_rdbuffer, EXAMPLES_BRIDGE_SEND_IOBUFIZE, 0,
(struct sockaddr*)&fromaddr, &addrlen);
tmpaddr = ntohl(fromaddr.sin_addr.s_addr);
printf(LABEL "Received %ld bytes from %d.%d.%d.%d:%d\n",
(long)nrecvd,
tmpaddr >> 24, (tmpaddr >> 16) & 0xff,
(tmpaddr >> 8) & 0xff, tmpaddr & 0xff,
ntohs(fromaddr.sin_port));
/* Check for a receive error or zero bytes received. The negative
* return value indicates a receive error; Zero would mean that the
* other side of the "connection" performed an "orderly" shutdown.
* This should not occur with a UDP socket and so must also be an
* error of some kind.
*/
if (nrecvd <= 0)
{
if (nrecvd < 0)
{
fprintf(stderr, LABEL "ERROR: recvfrom failed: %d\n", errno);
}
else
{
fprintf(stderr, LABEL "ERROR: recvfrom returned zero\n");
}
goto errout_with_recvsd;
}
/* Dump the received packet */
for (i = 0, j = 0; i < nrecvd; i++)
{
if ( g_rdbuffer[i] == ' ' && j >= 64)
{
putchar('\n');
j = 0;
}
else if (isprint(g_rdbuffer[i]))
{
putchar(g_rdbuffer[i]);
j++;
}
else if (g_rdbuffer[i] == '\n')
{
putchar('\n');
j = 0;
}
else if (g_rdbuffer[i] != '\r')
{
printf("\%03o", g_rdbuffer[i]);
j += 4;
}
}
close(recvsd);
close(recvsd);
return EXIT_SUCCESS;
errout_with_recvsd:
close(recvsd);
errout_with_sendsd:
close(sndsd);
return EXIT_FAILURE;
}
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