nes-proj/tests/09-ipv6/code/node.c
George Oikonomou 15f6e1d7a3 Change the way of accessing the default v6 prefix
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.
2018-11-11 18:30:54 +00:00

85 lines
2.8 KiB
C

/*
* Copyright (c) 2016, Yasuyuki Tanaka
* 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 copyright holder 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 COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*/
#include <contiki.h>
#include <net/mac/tsch/tsch.h>
#include <net/ipv6/uip.h>
#include <net/ipv6/uip-ds6.h>
#include <serial-shell.h>
#include <stdio.h>
PROCESS(node_process, "Node");
AUTOSTART_PROCESSES(&node_process);
PROCESS_THREAD(node_process, ev, data)
{
static struct etimer et;
#if WITH_ULA
static uip_ipaddr_t ipaddr;
const uip_ipaddr_t *default_prefix;
#endif /* WITH_ULA */
#if WITH_TSCH
static linkaddr_t coordinator_addr = {{0x00, 0x01, 0x00, 0x01,
0x00, 0x01, 0x00, 0x01}};
#endif /* WITH_TSCH */
PROCESS_BEGIN();
#if WITH_TSCH
if(linkaddr_cmp(&coordinator_addr, &linkaddr_node_addr)) {
tsch_set_coordinator(1);
}
#endif /* WITH_TSCH */
#if WITH_ULA
default_prefix = uip_ds6_default_prefix();
uip_ip6addr_copy(&ipaddr, default_prefix);
uip_ds6_prefix_add(&ipaddr, UIP_DEFAULT_PREFIX_LEN, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
#endif /* WITH_ULA */
serial_shell_init();
etimer_set(&et, CLOCK_SECOND);
while(1) {
/*
* keep doing something so that simulation runs until its timeout
*/
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
printf(".\n");
etimer_reset(&et);
}
PROCESS_END();
}