6655c876f2
The added function let a process to make the system go into deep sleep for maximum power saving. The udp-ipv6-example shows how to use these new functions.
118 lines
3.8 KiB
C
118 lines
3.8 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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* This file is part of the Contiki operating system.
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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 <string.h>
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#define DEBUG DEBUG_PRINT
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#include "net/uip-debug.h"
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#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
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#define MAX_PAYLOAD_LEN 120
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static struct uip_udp_conn *server_conn;
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PROCESS(udp_server_process, "UDP server process");
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AUTOSTART_PROCESSES(&udp_server_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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static int seq_id;
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char buf[MAX_PAYLOAD_LEN];
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if(uip_newdata()) {
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((char *)uip_appdata)[uip_datalen()] = 0;
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PRINTF("Server received: '%s' from ", (char *)uip_appdata);
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PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
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PRINTF("\n");
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uip_ipaddr_copy(&server_conn->ripaddr, &UIP_IP_BUF->srcipaddr);
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PRINTF("Responding with message: ");
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sprintf(buf, "Hello from the server! (%d)", ++seq_id);
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PRINTF("%s\n", buf);
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uip_udp_packet_send(server_conn, buf, strlen(buf));
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/* Restore server connection to allow data from any node */
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memset(&server_conn->ripaddr, 0, sizeof(server_conn->ripaddr));
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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print_local_addresses(void)
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{
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int i;
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uint8_t state;
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PRINTF("Server IPv6 addresses: ");
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for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
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state = uip_ds6_if.addr_list[i].state;
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if(uip_ds6_if.addr_list[i].isused &&
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(state == ADDR_TENTATIVE || state == ADDR_PREFERRED)) {
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PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
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PRINTF("\n");
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(udp_server_process, ev, data)
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{
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#if UIP_CONF_ROUTER
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uip_ipaddr_t ipaddr;
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#endif /* UIP_CONF_ROUTER */
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PROCESS_BEGIN();
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PRINTF("UDP server started\n");
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#if UIP_CONF_ROUTER
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uip_ip6addr(&ipaddr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
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uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
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uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
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#endif /* UIP_CONF_ROUTER */
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print_local_addresses();
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server_conn = udp_new(NULL, UIP_HTONS(3001), NULL);
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udp_bind(server_conn, UIP_HTONS(3000));
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while(1) {
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PROCESS_YIELD();
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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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