nes-proj/examples/mb851/udp-ipv6-sleep/udp-client.c

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/*
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
*/
#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"
#include "sleep.h"
#include "board-sensors.h"
#include <string.h>
#define DEBUG DEBUG_PRINT
#include "net/uip-debug.h"
#define SEND_INTERVAL 25 * CLOCK_SECOND
/* Seconds during which the system must be in deep sleep.
* During deep sleep all the OS is frozen. */
#define SLEEP_INTERVAL_SECONDS 6
/* System does not go to sleep until AWAKE_INTERVAL is passed.
* This is done to let IP stack receive Neigbhor Advertisements
* and eventual response packets from the server. */
#define AWAKE_INTERVAL 3 * CLOCK_SECOND
#define MAX_PAYLOAD_LEN 40
static struct uip_udp_conn *client_conn;
/*---------------------------------------------------------------------------*/
PROCESS(udp_client_process, "UDP client process");
AUTOSTART_PROCESSES(&udp_client_process);
/*---------------------------------------------------------------------------*/
static void
tcpip_handler(void)
{
char *str;
if(uip_newdata()) {
str = uip_appdata;
str[uip_datalen()] = '\0';
printf("Response from the server: '%s'\n", str);
}
}
/*---------------------------------------------------------------------------*/
static void
timeout_handler(void)
{
static int seq_id;
char buf[MAX_PAYLOAD_LEN];
printf("Client sending to: ");
PRINT6ADDR(&client_conn->ripaddr);
sprintf(buf, "Hello %d from the client", ++seq_id);
printf(" (msg: %s)\n", buf);
#if SEND_TOO_LARGE_PACKET_TO_TEST_FRAGMENTATION
uip_udp_packet_send(client_conn, buf, UIP_APPDATA_SIZE);
#else /* SEND_TOO_LARGE_PACKET_TO_TEST_FRAGMENTATION */
uip_udp_packet_send(client_conn, buf, strlen(buf));
#endif /* SEND_TOO_LARGE_PACKET_TO_TEST_FRAGMENTATION */
}
/*---------------------------------------------------------------------------*/
static void
print_local_addresses(void)
{
int i;
uint8_t state;
PRINTF("Client IPv6 addresses: ");
for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
state = uip_ds6_if.addr_list[i].state;
if(uip_ds6_if.addr_list[i].isused &&
(state == ADDR_TENTATIVE || state == ADDR_PREFERRED)) {
PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
PRINTF("\n");
}
}
}
/*---------------------------------------------------------------------------*/
#if UIP_CONF_ROUTER
static void
set_global_address(void)
{
uip_ipaddr_t ipaddr;
uip_ip6addr(&ipaddr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
}
#endif /* UIP_CONF_ROUTER */
/*---------------------------------------------------------------------------*/
static void
set_connection_address(uip_ipaddr_t *ipaddr)
{
#define _QUOTEME(x) #x
#define QUOTEME(x) _QUOTEME(x)
#ifdef UDP_CONNECTION_ADDR
if(uiplib_ipaddrconv(QUOTEME(UDP_CONNECTION_ADDR), ipaddr) == 0) {
PRINTF("UDP client failed to parse address '%s'\n", QUOTEME(UDP_CONNECTION_ADDR));
}
#elif UIP_CONF_ROUTER
uip_ip6addr(ipaddr,0xaaaa,0,0,0,0x0280,0xe102,0x0000,0x008a);
#else
uip_ip6addr(ipaddr,0xfe80,0,0,0,0x0280,0xe102,0x0000,0x008a);
#endif /* UDP_CONNECTION_ADDR */
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(udp_client_process, ev, data)
{
static struct etimer et, wake_timer, periodic_timer;
uip_ipaddr_t ipaddr;
PROCESS_BEGIN();
PRINTF("UDP client process started\n");
#if UIP_CONF_ROUTER
set_global_address();
#endif
print_local_addresses();
set_connection_address(&ipaddr);
/* new connection with remote host */
client_conn = udp_new(&ipaddr, UIP_HTONS(3000), NULL);
udp_bind(client_conn, UIP_HTONS(3001));
PRINTF("Created a connection with the server ");
PRINT6ADDR(&client_conn->ripaddr);
PRINTF(" local/remote port %u/%u\n",
UIP_HTONS(client_conn->lport), UIP_HTONS(client_conn->rport));
etimer_set(&et, CLOCK_SECOND*10);
PROCESS_WAIT_UNTIL(etimer_expired(&et)); // Wait for DAD and Router Discovery procedure to end.
etimer_set(&et, SEND_INTERVAL);
etimer_set(&wake_timer, AWAKE_INTERVAL);
etimer_set(&periodic_timer, 1);
while(1) {
PROCESS_YIELD();
if(etimer_expired(&wake_timer)){ // if timer hasn't expired do not go in deep sleep, in order to receive a response.
printf("Sleeping...\r\n");
sensorsPowerDown();
sleep_seconds(SLEEP_INTERVAL_SECONDS); // Put system in deep sleep mode for a while.
sensorsPowerUp();
printf("Awake\r\n");
}
if(etimer_expired(&et)) {
timeout_handler();
etimer_restart(&et);
etimer_restart(&wake_timer);
} else if(ev == tcpip_event) {
tcpip_handler();
}
/* Make the process be called almost immediately,
* so that it can force the system to go into deep sleep. */
etimer_restart(&periodic_timer);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/