px4-firmware/apps/examples/discover/discover_main.c

189 lines
5.7 KiB
C

/****************************************************************************
* examples/discover/discover_main.c
*
* Copyright (C) 2012 Max Holtzberg. All rights reserved.
* Copyright (C) 2008, 2011-2012 Gregory Nutt. All rights reserved.
*
* Authors: Max Holtzberg <mh@uvc.de>
* 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 <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <debug.h>
#include <net/if.h>
#include <nuttx/net/uip/uip.h>
#include <nuttx/net/uip/uip-arp.h>
#include <apps/netutils/uiplib.h>
#include <apps/netutils/discover.h>
#ifdef CONFIG_EXAMPLES_DISCOVER_DHCPC
# include <arpa/inet.h>
#endif
/* Here we include the header file for the application(s) we use in
* our project as defined in the config/<board-name>/defconfig file
*/
/* DHCPC may be used in conjunction with any other feature (or not) */
#ifdef CONFIG_EXAMPLES_DISCOVER_DHCPC
# include <apps/netutils/resolv.h>
# include <apps/netutils/dhcpc.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* discover_main
****************************************************************************/
int discover_main(int argc, char *argv[])
{
/* If this task is excecutated as an NSH built-in function, then the
* network has already been configured by NSH's start-up logic.
*/
#ifndef CONFIG_NSH_BUILTIN_APPS
struct in_addr addr;
#if defined(CONFIG_EXAMPLES_DISCOVER_DHCPC) || defined(CONFIG_EXAMPLES_DISCOVER_NOMAC)
uint8_t mac[IFHWADDRLEN];
#endif
#ifdef CONFIG_EXAMPLES_DISCOVER_DHCPC
void *handle;
#endif
/* Many embedded network interfaces must have a software assigned MAC */
#ifdef CONFIG_EXAMPLES_DISCOVER_NOMAC
mac[0] = 0x00;
mac[1] = 0xe0;
mac[2] = 0xde;
mac[3] = 0xad;
mac[4] = 0xbe;
mac[5] = 0xef;
uip_setmacaddr("eth0", mac);
#endif
/* Set up our host address */
#ifdef CONFIG_EXAMPLES_DISCOVER_DHCPC
addr.s_addr = 0;
#else
addr.s_addr = HTONL(CONFIG_EXAMPLES_DISCOVER_IPADDR);
#endif
uip_sethostaddr("eth0", &addr);
/* Set up the default router address */
addr.s_addr = HTONL(CONFIG_EXAMPLES_DISCOVER_DRIPADDR);
uip_setdraddr("eth0", &addr);
/* Setup the subnet mask */
addr.s_addr = HTONL(CONFIG_EXAMPLES_DISCOVER_NETMASK);
uip_setnetmask("eth0", &addr);
#ifdef CONFIG_EXAMPLES_DISCOVER_DHCPC
/* Set up the resolver */
resolv_init();
/* Get the MAC address of the NIC */
uip_getmacaddr("eth0", mac);
/* Set up the DHCPC modules */
handle = dhcpc_open(&mac, IFHWADDRLEN);
/* Get an IP address. Note: there is no logic here for renewing the address in this
* example. The address should be renewed in ds.lease_time/2 seconds.
*/
printf("Getting IP address\n");
if (handle)
{
struct dhcpc_state ds;
(void)dhcpc_request(handle, &ds);
uip_sethostaddr("eth1", &ds.ipaddr);
if (ds.netmask.s_addr != 0)
{
uip_setnetmask("eth0", &ds.netmask);
}
if (ds.default_router.s_addr != 0)
{
uip_setdraddr("eth0", &ds.default_router);
}
if (ds.dnsaddr.s_addr != 0)
{
resolv_conf(&ds.dnsaddr);
}
dhcpc_close(handle);
printf("IP: %s\n", inet_ntoa(ds.ipaddr));
}
#endif /* CONFIG_EXAMPLES_DISCOVER_DHCPC */
#endif /* CONFIG_NSH_BUILTIN_APPS */
if (discover_start() < 0)
{
ndbg("Could not start discover daemon.\n");
return ERROR;
}
return OK;
}