15f6e1d7a3
This commit changes the method of accessing the default v6 prefix. Instead of always using `UIP_DS6_DEFAULT_PREFIX`, we store the default prefix in a variable. We subsequently retrieve the prefix by calling `uip_ds6_default_prefix()`. `uip_ds6_init()` will set this variable to the value of `UIP_DS6_DEFAULT_PREFIX`, but only if the startup code has not set a different default prefix before `uip_ds6_init()` gets called. This approach has the following benefits: * It allows us to change the default prefix at run time. * It allows the startup code to set a prefix different than the one specified by `UIP_DS6_DEFAULT_PREFIX`, which can be useful if the default prefix comes from a different source (e.g. the command line for native, or a configuration stored on a node's flash) * In many places the current code assumes that the prefix contains 6 bytes of zeros (e.g. `FDxx::/64`). Changing to a different prefix (e.g. `FD00:ABCD::`) would need extensive code changes. This change here makes it easy to use a prefix of any length.
138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/*
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* Copyright (c) 2012, Thingsquare, www.thingsquare.com.
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* All rights reserved.
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*
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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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#include "contiki.h"
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#include "lib/random.h"
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#include "sys/ctimer.h"
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#include "sys/etimer.h"
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#include "net/ipv6/uip.h"
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#include "net/ipv6/uip-ds6.h"
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#include "net/ipv6/uip-debug.h"
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#include "simple-udp.h"
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#include <stdio.h>
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#include <string.h>
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#define UDP_PORT 1234
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#define SEND_INTERVAL (60 * CLOCK_SECOND)
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#define SEND_TIME (random_rand() % (SEND_INTERVAL))
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static struct simple_udp_connection unicast_connection;
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/*---------------------------------------------------------------------------*/
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PROCESS(sender_node_process, "Sender node process");
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AUTOSTART_PROCESSES(&sender_node_process);
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/*---------------------------------------------------------------------------*/
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static void
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receiver(struct simple_udp_connection *c,
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const uip_ipaddr_t *sender_addr,
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uint16_t sender_port,
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const uip_ipaddr_t *receiver_addr,
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uint16_t receiver_port,
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const uint8_t *data,
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uint16_t datalen)
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{
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printf("Sender received data on port %d from port %d with length %d\n",
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receiver_port, sender_port, datalen);
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}
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/*---------------------------------------------------------------------------*/
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static void
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set_global_address(void)
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{
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uip_ipaddr_t ipaddr;
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int i;
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uint8_t state;
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const uip_ipaddr_t *default_prefix = uip_ds6_default_prefix();
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uip_ip6addr_copy(&ipaddr, default_prefix);
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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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printf("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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uip_debug_ipaddr_print(&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(sender_node_process, ev, data)
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{
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static struct etimer periodic_timer;
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static struct etimer send_timer;
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uip_ipaddr_t addr;
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const uip_ipaddr_t *default_prefix;
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PROCESS_BEGIN();
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set_global_address();
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simple_udp_register(&unicast_connection, UDP_PORT,
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NULL, UDP_PORT, receiver);
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etimer_set(&periodic_timer, SEND_INTERVAL);
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
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etimer_reset(&periodic_timer);
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etimer_set(&send_timer, SEND_TIME);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&send_timer));
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default_prefix = uip_ds6_default_prefix();
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uip_ip6addr_copy(&addr, default_prefix);
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addr.u16[4] = UIP_HTONS(0x0201);
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addr.u16[5] = UIP_HTONS(0x0001);
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addr.u16[6] = UIP_HTONS(0x0001);
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addr.u16[7] = UIP_HTONS(0x0001);
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{
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static unsigned int message_number;
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char buf[20];
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printf("Sending unicast to ");
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uip_debug_ipaddr_print(&addr);
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printf("\n");
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sprintf(buf, "Message %d", message_number);
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message_number++;
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simple_udp_sendto(&unicast_connection, buf, strlen(buf) + 1, &addr);
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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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