mirror of
https://github.com/oliverschmidt/contiki.git
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198 lines
6.2 KiB
C
198 lines
6.2 KiB
C
/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc26xx-web-demo
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* @{
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*
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* \file
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* An implementation of a 6LBR UDP client. Is used to populate the 6LBR
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* web server's 'sensors' tab
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "contiki-lib.h"
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#include "contiki-net.h"
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#include "net/rpl/rpl.h"
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#include "net/ip/uip.h"
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#include <string.h>
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#include <stdio.h>
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#include "net/ip/uip-debug.h"
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/*---------------------------------------------------------------------------*/
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#ifndef CETIC_6LBR_NODE_INFO_PORT
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#define CETIC_6LBR_NODE_INFO_PORT 3000
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#endif
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#define MAX_PAYLOAD_LEN 40
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#define MSG_INTERVAL (60 * CLOCK_SECOND)
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/*---------------------------------------------------------------------------*/
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static struct uip_udp_conn *client_conn = NULL;
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static struct etimer et;
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static uip_ip6addr_t dest_addr;
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/*---------------------------------------------------------------------------*/
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PROCESS(cetic_6lbr_client_process, "6LBR Client Process");
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/*---------------------------------------------------------------------------*/
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static void
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tcpip_handler(void)
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{
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char *str;
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if(uip_newdata()) {
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str = uip_appdata;
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str[uip_datalen()] = '\0';
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PRINTF("Response from the server: '%s'\n", str);
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}
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}
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/*---------------------------------------------------------------------------*/
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static char *
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add_ipaddr(char *buf, const uip_ipaddr_t *addr)
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{
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uint16_t a;
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unsigned int i;
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int f;
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char *p = buf;
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for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
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a = (addr->u8[i] << 8) + addr->u8[i + 1];
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if(a == 0 && f >= 0) {
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if(f++ == 0) {
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p += sprintf(p, "::");
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}
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} else {
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if(f > 0) {
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f = -1;
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} else if(i > 0) {
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p += sprintf(p, ":");
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}
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p += sprintf(p, "%04x", a);
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}
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}
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return p;
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}
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/*---------------------------------------------------------------------------*/
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static void
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timeout_handler(void)
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{
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static int seq_id;
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char buf[MAX_PAYLOAD_LEN];
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int i;
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uip_ip6addr_t *globaladdr = NULL;
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uint16_t dest_port = CETIC_6LBR_NODE_INFO_PORT;
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int has_dest = 0;
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rpl_dag_t *dag;
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uip_ds6_addr_t *addr_desc = uip_ds6_get_global(ADDR_PREFERRED);
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if(addr_desc != NULL) {
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globaladdr = &addr_desc->ipaddr;
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dag = rpl_get_any_dag();
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if(dag) {
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uip_ipaddr_copy(&dest_addr, globaladdr);
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memcpy(&dest_addr.u8[8], &dag->dag_id.u8[8], sizeof(uip_ipaddr_t) / 2);
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has_dest = 1;
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}
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}
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if(has_dest) {
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if(client_conn == NULL) {
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PRINTF("UDP-CLIENT: address destination: ");
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PRINT6ADDR(&dest_addr);
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PRINTF("\n");
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client_conn = udp_new(&dest_addr, UIP_HTONS(dest_port), NULL);
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if(client_conn != NULL) {
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PRINTF("Created a connection with the server ");
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PRINT6ADDR(&client_conn->ripaddr);
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PRINTF(" local/remote port %u/%u\n",
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UIP_HTONS(client_conn->lport), UIP_HTONS(client_conn->rport));
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} else {
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PRINTF("Could not open connection\n");
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}
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} else {
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if(memcmp(&client_conn->ripaddr, &dest_addr, sizeof(uip_ipaddr_t)) != 0) {
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PRINTF("UDP-CLIENT: new address destination: ");
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PRINT6ADDR(&dest_addr);
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PRINTF("\n");
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uip_udp_remove(client_conn);
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client_conn = udp_new(&dest_addr, UIP_HTONS(dest_port), NULL);
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if(client_conn != NULL) {
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PRINTF("Created a connection with the server ");
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PRINT6ADDR(&client_conn->ripaddr);
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PRINTF(" local/remote port %u/%u\n",
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UIP_HTONS(client_conn->lport), UIP_HTONS(client_conn->rport));
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} else {
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PRINTF("Could not open connection\n");
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}
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}
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}
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if(client_conn != NULL) {
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PRINTF("Client sending to: ");
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PRINT6ADDR(&client_conn->ripaddr);
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i = sprintf(buf, "%d | ", ++seq_id);
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dag = rpl_get_any_dag();
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if(dag && dag->instance->def_route) {
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add_ipaddr(buf + i, &dag->instance->def_route->ipaddr);
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} else {
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sprintf(buf + i, "(null)");
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}
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PRINTF(" (msg: %s)\n", buf);
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uip_udp_packet_send(client_conn, buf, strlen(buf));
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} else {
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PRINTF("No connection created\n");
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}
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} else {
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PRINTF("No address configured\n");
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}
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(cetic_6lbr_client_process, ev, data)
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{
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PROCESS_BEGIN();
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printf("6LBR Client Process\n");
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memset(&dest_addr, 0, sizeof(uip_ipaddr_t));
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etimer_set(&et, MSG_INTERVAL);
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while(1) {
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PROCESS_YIELD();
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if(etimer_expired(&et)) {
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timeout_handler();
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etimer_set(&et, MSG_INTERVAL);
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} else if(ev == tcpip_event) {
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tcpip_handler();
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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*/
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