nes-proj/examples/cc26xx/cc26xx-web-demo/cetic-6lbr-client.c
2015-02-25 13:15:35 +01:00

198 lines
6.2 KiB
C

/*
* 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.
*/
/**
* \addtogroup cc26xx-web-demo
* @{
*
* \file
* An implementation of a 6LBR UDP client. Is used to populate the 6LBR
* web server's 'sensors' tab
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"
#include "net/rpl/rpl.h"
#include "net/ip/uip.h"
#include <string.h>
#include <stdio.h>
/*---------------------------------------------------------------------------*/
#define DEBUG 0
#include "net/ip/uip-debug.h"
/*---------------------------------------------------------------------------*/
#ifndef CETIC_6LBR_NODE_INFO_PORT
#define CETIC_6LBR_NODE_INFO_PORT 3000
#endif
#define MAX_PAYLOAD_LEN 40
#define MSG_INTERVAL (60 * CLOCK_SECOND)
/*---------------------------------------------------------------------------*/
static struct uip_udp_conn *client_conn = NULL;
static struct etimer et;
static uip_ip6addr_t dest_addr;
/*---------------------------------------------------------------------------*/
PROCESS(cetic_6lbr_client_process, "6LBR 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 char *
add_ipaddr(char *buf, const uip_ipaddr_t *addr)
{
uint16_t a;
unsigned int i;
int f;
char *p = buf;
for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
a = (addr->u8[i] << 8) + addr->u8[i + 1];
if(a == 0 && f >= 0) {
if(f++ == 0) {
p += sprintf(p, "::");
}
} else {
if(f > 0) {
f = -1;
} else if(i > 0) {
p += sprintf(p, ":");
}
p += sprintf(p, "%04x", a);
}
}
return p;
}
/*---------------------------------------------------------------------------*/
static void
timeout_handler(void)
{
static int seq_id;
char buf[MAX_PAYLOAD_LEN];
int i;
uip_ip6addr_t *globaladdr = NULL;
uint16_t dest_port = CETIC_6LBR_NODE_INFO_PORT;
int has_dest = 0;
rpl_dag_t *dag;
uip_ds6_addr_t *addr_desc = uip_ds6_get_global(ADDR_PREFERRED);
if(addr_desc != NULL) {
globaladdr = &addr_desc->ipaddr;
dag = rpl_get_any_dag();
if(dag) {
uip_ipaddr_copy(&dest_addr, globaladdr);
memcpy(&dest_addr.u8[8], &dag->dag_id.u8[8], sizeof(uip_ipaddr_t) / 2);
has_dest = 1;
}
}
if(has_dest) {
if(client_conn == NULL) {
PRINTF("UDP-CLIENT: address destination: ");
PRINT6ADDR(&dest_addr);
PRINTF("\n");
client_conn = udp_new(&dest_addr, UIP_HTONS(dest_port), NULL);
if(client_conn != NULL) {
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));
} else {
PRINTF("Could not open connection\n");
}
} else {
if(memcmp(&client_conn->ripaddr, &dest_addr, sizeof(uip_ipaddr_t)) != 0) {
PRINTF("UDP-CLIENT: new address destination: ");
PRINT6ADDR(&dest_addr);
PRINTF("\n");
uip_udp_remove(client_conn);
client_conn = udp_new(&dest_addr, UIP_HTONS(dest_port), NULL);
if(client_conn != NULL) {
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));
} else {
PRINTF("Could not open connection\n");
}
}
}
if(client_conn != NULL) {
PRINTF("Client sending to: ");
PRINT6ADDR(&client_conn->ripaddr);
i = sprintf(buf, "%d | ", ++seq_id);
dag = rpl_get_any_dag();
if(dag && dag->instance->def_route) {
add_ipaddr(buf + i, &dag->instance->def_route->ipaddr);
} else {
sprintf(buf + i, "(null)");
}
PRINTF(" (msg: %s)\n", buf);
uip_udp_packet_send(client_conn, buf, strlen(buf));
} else {
PRINTF("No connection created\n");
}
} else {
PRINTF("No address configured\n");
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(cetic_6lbr_client_process, ev, data)
{
PROCESS_BEGIN();
printf("6LBR Client Process\n");
memset(&dest_addr, 0, sizeof(uip_ipaddr_t));
etimer_set(&et, MSG_INTERVAL);
while(1) {
PROCESS_YIELD();
if(etimer_expired(&et)) {
timeout_handler();
etimer_set(&et, MSG_INTERVAL);
} else if(ev == tcpip_event) {
tcpip_handler();
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
/**
* @}
*/