nes-proj/examples/udp-stream/udp-stream.c

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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* 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.
*
*/
/**
* \file
* An example sending a UDP stream
* \author
* Simon Duquennoy <simonduq@sics.se>
*/
#include "contiki.h"
#include "contiki-net.h"
#include "uip.h"
#include "net/rpl/rpl.h"
#include "sys/node-id.h"
#include "servreg-hack.h"
#include "cfs/cfs.h"
#include "cfs/cfs-coffee.h"
#define SINK_ID 1
#define SENDER_ID 5
#define DATASIZE 73
#define STREAMLEN QUEUEBUF_CONF_NUM
#define UDP_PORT 9876
#define SERVICE_ID 190
struct msg {
uint8_t streamno;
uint8_t seqno;
uint8_t buf[DATASIZE];
};
static struct simple_udp_connection unicast_connection;
/*---------------------------------------------------------------------------*/
PROCESS(udpstream_process, "UDP Stream Process");
AUTOSTART_PROCESSES(&udpstream_process);
/*---------------------------------------------------------------------------*/
static uip_ipaddr_t *
set_global_address(void)
{
static uip_ipaddr_t ipaddr;
int i;
uint8_t state;
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);
printf("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)) {
uip_debug_ipaddr_print(&uip_ds6_if.addr_list[i].ipaddr);
printf("\n");
}
}
return &ipaddr;
}
/*---------------------------------------------------------------------------*/
static void
create_rpl_dag(uip_ipaddr_t *ipaddr)
{
struct uip_ds6_addr *root_if;
root_if = uip_ds6_addr_lookup(ipaddr);
if(root_if != NULL) {
rpl_dag_t *dag;
uip_ipaddr_t prefix;
rpl_set_root(RPL_DEFAULT_INSTANCE, ipaddr);
dag = rpl_get_any_dag();
uip_ip6addr(&prefix, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
rpl_set_prefix(dag, &prefix, 64);
printf("created a new RPL dag\n");
} else {
printf("failed to create a new RPL DAG\n");
}
}
/*---------------------------------------------------------------------------*/
static void
receiver(struct simple_udp_connection *c,
const uip_ipaddr_t *sender_addr,
uint16_t sender_port,
const uip_ipaddr_t *receiver_addr,
uint16_t receiver_port,
const uint8_t *data,
uint16_t datalen)
{
static int cpt;
cpt++;
if(cpt%128==0) {
printf("Received %d datagrams\n", cpt);
}
}
/*---------------------------------------------------------------------------*/
static void
send_stream(uip_ipaddr_t *addr, uint16_t streamno)
{
int i;
int seqno = 0;
struct msg msg;
memset(&msg, 0xaa, sizeof(msg));
msg.streamno = streamno;
for(i=0; i<STREAMLEN; i++) {
msg.seqno = ++seqno;
simple_udp_sendto(&unicast_connection, (char*)&msg, sizeof(msg), addr);
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(udpstream_process, ev, data)
{
static uint16_t streamno;
static struct etimer et;
static uip_ipaddr_t *ipaddr;
PROCESS_BEGIN();
PROCESS_PAUSE();
printf("Formatting Coffee FS...\n");
cfs_coffee_format();
printf("done.\n");
/* We need re-initialize queuebuf after formatting */
queuebuf_init();
/* Start service registration */
servreg_hack_init();
ipaddr = set_global_address();
if(node_id == SINK_ID) {
/* The sink creates a dag and waits for UDP datagrams */
create_rpl_dag(ipaddr);
servreg_hack_register(SERVICE_ID, ipaddr);
simple_udp_register(&unicast_connection, UDP_PORT,
NULL, UDP_PORT, receiver);
while(1) {
PROCESS_WAIT_EVENT();
}
} else if(node_id == SENDER_ID) {
/* The sender looks for the sink and sends UDP streams */
ipaddr = NULL;
simple_udp_register(&unicast_connection, UDP_PORT,
NULL, UDP_PORT, receiver);
etimer_set(&et, 10*CLOCK_SECOND);
etimer_restart(&et);
while(1) {
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
if(ipaddr != NULL) {
streamno++;
send_stream(ipaddr, streamno);
} else {
ipaddr = servreg_hack_lookup(SERVICE_ID);
if(ipaddr != NULL) {
etimer_set(&et, 2*CLOCK_SECOND);
printf("Streaming to ");
uip_debug_ipaddr_print(ipaddr);
printf("\n");
} else {
printf("Service %d not found\n", SERVICE_ID);
}
}
etimer_restart(&et);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/