osd-contiki/examples/cc2530dk/udp-ipv6/server.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 <string.h>
#define DEBUG DEBUG_PRINT
#include "net/ip/uip-debug.h"
#include "dev/watchdog.h"
#include "dev/leds.h"
#include "net/rpl/rpl.h"
#include "dev/button-sensor.h"
#include "debug.h"
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define MAX_PAYLOAD_LEN 120
static struct uip_udp_conn *server_conn;
static char buf[MAX_PAYLOAD_LEN];
static uint16_t len;
#define SERVER_REPLY 1
/* Should we act as RPL root? */
#define SERVER_RPL_ROOT 0
#if SERVER_RPL_ROOT
static uip_ipaddr_t ipaddr;
#endif
/*---------------------------------------------------------------------------*/
PROCESS(udp_server_process, "UDP server process");
AUTOSTART_PROCESSES(&udp_server_process);
/*---------------------------------------------------------------------------*/
static void
tcpip_handler(void)
{
memset(buf, 0, MAX_PAYLOAD_LEN);
if(uip_newdata()) {
leds_on(LEDS_RED);
len = uip_datalen();
memcpy(buf, uip_appdata, len);
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PRINTF("%u bytes from [", len);
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("]:%u\n", UIP_HTONS(UIP_UDP_BUF->srcport));
#if SERVER_REPLY
uip_ipaddr_copy(&server_conn->ripaddr, &UIP_IP_BUF->srcipaddr);
server_conn->rport = UIP_UDP_BUF->srcport;
uip_udp_packet_send(server_conn, buf, len);
/* Restore server connection to allow data from any node */
uip_create_unspecified(&server_conn->ripaddr);
server_conn->rport = 0;
#endif
}
leds_off(LEDS_RED);
return;
}
/*---------------------------------------------------------------------------*/
#if (BUTTON_SENSOR_ON && (DEBUG==DEBUG_PRINT))
static void
print_stats()
{
PRINTF("tl=%lu, ts=%lu, bs=%lu, bc=%lu\n",
RIMESTATS_GET(toolong), RIMESTATS_GET(tooshort),
RIMESTATS_GET(badsynch), RIMESTATS_GET(badcrc));
PRINTF("llrx=%lu, lltx=%lu, rx=%lu, tx=%lu\n", RIMESTATS_GET(llrx),
RIMESTATS_GET(lltx), RIMESTATS_GET(rx), RIMESTATS_GET(tx));
}
#endif
/*---------------------------------------------------------------------------*/
static void
print_local_addresses(void)
{
int i;
uint8_t state;
PRINTF("Server IPv6 addresses:\n");
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)) {
PRINTF(" ");
PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
PRINTF("\n");
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if(state == ADDR_TENTATIVE) {
uip_ds6_if.addr_list[i].state = ADDR_PREFERRED;
}
}
}
}
/*---------------------------------------------------------------------------*/
#if SERVER_RPL_ROOT
void
create_dag()
{
rpl_dag_t *dag;
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
print_local_addresses();
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dag = rpl_set_root(RPL_DEFAULT_INSTANCE,
&uip_ds6_get_global(ADDR_PREFERRED)->ipaddr);
if(dag != NULL) {
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
rpl_set_prefix(dag, &ipaddr, 64);
PRINTF("Created a new RPL dag with ID: ");
PRINT6ADDR(&dag->dag_id);
PRINTF("\n");
}
}
#endif /* SERVER_RPL_ROOT */
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(udp_server_process, ev, data)
{
PROCESS_BEGIN();
putstring("Starting UDP server\n");
#if BUTTON_SENSOR_ON
putstring("Button 1: Print RIME stats\n");
#endif
#if SERVER_RPL_ROOT
create_dag();
#endif
server_conn = udp_new(NULL, UIP_HTONS(0), NULL);
udp_bind(server_conn, UIP_HTONS(3000));
PRINTF("Listen port: 3000, TTL=%u\n", server_conn->ttl);
while(1) {
PROCESS_YIELD();
if(ev == tcpip_event) {
tcpip_handler();
#if (BUTTON_SENSOR_ON && (DEBUG==DEBUG_PRINT))
} else if(ev == sensors_event && data == &button_sensor) {
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print_stats();
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#endif /* BUTTON_SENSOR_ON */
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/