391 lines
11 KiB
C
391 lines
11 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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/**
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* \file
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* border-router
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* \author
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* Niclas Finne <nfi@sics.se>
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* Joakim Eriksson <joakime@sics.se>
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* Nicolas Tsiftes <nvt@sics.se>
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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/uip.h"
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#include "net/uip-ds6.h"
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#include "net/rpl/rpl.h"
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#include "net/netstack.h"
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#include "dev/button-sensor.h"
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#include "dev/slip.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#define DEBUG DEBUG_NONE
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#include "net/uip-debug.h"
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uint16_t dag_id[] = {0x1111, 0x1100, 0, 0, 0, 0, 0, 0x0011};
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extern uip_ds6_nbr_t uip_ds6_nbr_cache[];
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static uip_ipaddr_t prefix;
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static uint8_t prefix_set;
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PROCESS(border_router_process, "Border router process");
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#if WEBSERVER==0
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/* No webserver */
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AUTOSTART_PROCESSES(&border_router_process);
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#elif WEBSERVER>1
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/* Use an external webserver application */
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#include "webserver-nogui.h"
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AUTOSTART_PROCESSES(&border_router_process,&webserver_nogui_process);
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#else
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/* Use simple webserver with only one page for minimum footprint.
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* Multiple connections can result in interleaved tcp segments since
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* a single static buffer is used for all segments.
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*/
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#include "httpd-simple.h"
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/* The internal webserver can provide additional information if
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* enough program flash is available.
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*/
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#define WEBSERVER_CONF_LOADTIME 0
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#define WEBSERVER_CONF_FILESTATS 0
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#define WEBSERVER_CONF_NEIGHBOR_STATUS 0
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/* Adding links requires a larger RAM buffer. To avoid static allocation
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* the stack can be used for formatting; however tcp retransmissions
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* and multiple connections can result in garbled segments.
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* TODO:use PSOCk_GENERATOR_SEND and tcp state storage to fix this.
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*/
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#define WEBSERVER_CONF_ROUTE_LINKS 0
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#if WEBSERVER_CONF_ROUTE_LINKS
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#define BUF_USES_STACK 1
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#endif
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PROCESS(webserver_nogui_process, "Web server");
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PROCESS_THREAD(webserver_nogui_process, ev, data)
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{
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PROCESS_BEGIN();
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httpd_init();
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
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httpd_appcall(data);
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}
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PROCESS_END();
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}
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AUTOSTART_PROCESSES(&border_router_process,&webserver_nogui_process);
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static const char *TOP = "<html><head><title>ContikiRPL</title></head><body>\n";
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static const char *BOTTOM = "</body></html>\n";
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#if BUF_USES_STACK
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static char *bufptr, *bufend;
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#define ADD(...) do { \
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bufptr += snprintf(bufptr, bufend - bufptr, __VA_ARGS__); \
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} while(0)
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#else
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static char buf[256];
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static int blen;
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#define ADD(...) do { \
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blen += snprintf(&buf[blen], sizeof(buf) - blen, __VA_ARGS__); \
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} while(0)
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#endif
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/*---------------------------------------------------------------------------*/
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static void
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ipaddr_add(const uip_ipaddr_t *addr)
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{
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uint16_t a;
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int i, f;
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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) ADD("::");
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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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ADD(":");
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}
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ADD("%x", a);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(generate_routes(struct httpd_state *s))
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{
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static int i;
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static uip_ds6_route_t *r;
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#if BUF_USES_STACK
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char buf[256];
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#endif
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#if WEBSERVER_CONF_LOADTIME
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static clock_time_t numticks;
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numticks = clock_time();
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#endif
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PSOCK_BEGIN(&s->sout);
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SEND_STRING(&s->sout, TOP);
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#if BUF_USES_STACK
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bufptr = buf;bufend=bufptr+sizeof(buf);
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#else
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blen = 0;
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#endif
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ADD("Neighbors<pre>");
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for(i = 0; i < UIP_DS6_NBR_NB; i++) {
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if(uip_ds6_nbr_cache[i].isused) {
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#if WEBSERVER_CONF_NEIGHBOR_STATUS
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#if BUF_USES_STACK
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{char* j=bufptr+25;
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ipaddr_add(&uip_ds6_nbr_cache[i].ipaddr);
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while (bufptr < j) ADD(" ");
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switch (uip_ds6_nbr_cache[i].state) {
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case NBR_INCOMPLETE: ADD(" INCOMPLETE");break;
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case NBR_REACHABLE: ADD(" REACHABLE");break;
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case NBR_STALE: ADD(" STALE");break;
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case NBR_DELAY: ADD(" DELAY");break;
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case NBR_PROBE: ADD(" NBR_PROBE");break;
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}
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}
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#else
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{uint8_t j=blen+25;
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ipaddr_add(&uip_ds6_nbr_cache[i].ipaddr);
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while (blen < j) ADD(" ");
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switch (uip_ds6_nbr_cache[i].state) {
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case NBR_INCOMPLETE: ADD(" INCOMPLETE");break;
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case NBR_REACHABLE: ADD(" REACHABLE");break;
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case NBR_STALE: ADD(" STALE");break;
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case NBR_DELAY: ADD(" DELAY");break;
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case NBR_PROBE: ADD(" NBR_PROBE");break;
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}
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}
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#endif
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#else
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ipaddr_add(&uip_ds6_nbr_cache[i].ipaddr);
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#endif
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ADD("\n");
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#if BUF_USES_STACK
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if(bufptr > bufend - 45) {
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SEND_STRING(&s->sout, buf);
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bufptr = buf; bufend = bufptr + sizeof(buf);
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}
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#else
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if(blen > sizeof(buf) - 45) {
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SEND_STRING(&s->sout, buf);
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blen = 0;
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}
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#endif
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}
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}
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ADD("</pre>Routes<pre>");
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SEND_STRING(&s->sout, buf);
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#if BUF_USES_STACK
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bufptr = buf; bufend = bufptr + sizeof(buf);
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#else
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blen = 0;
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#endif
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for(r = uip_ds6_route_list_head(); r != NULL; r = list_item_next(r)) {
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#if BUF_USES_STACK
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#if WEBSERVER_CONF_ROUTE_LINKS
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ADD("<a href=http://[");
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ipaddr_add(&r->ipaddr);
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ADD("]/status.shtml>");
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ipaddr_add(&r->ipaddr);
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ADD("</a>");
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#else
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ipaddr_add(&r->ipaddr);
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#endif
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#else
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#if WEBSERVER_CONF_ROUTE_LINKS
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ADD("<a href=http://[");
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ipaddr_add(&r->ipaddr);
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ADD("]/status.shtml>");
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SEND_STRING(&s->sout, buf); //TODO: why tunslip6 needs an output here, wpcapslip does not
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blen = 0;
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ipaddr_add(&r->ipaddr);
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ADD("</a>");
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#else
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ipaddr_add(&r->ipaddr);
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#endif
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#endif
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ADD("/%u (via ", r->length);
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ipaddr_add(&r->nexthop);
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if(1 || (r->state.lifetime < 600)) {
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ADD(") %lus\n", r->state.lifetime);
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} else {
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ADD(")\n");
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}
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SEND_STRING(&s->sout, buf);
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#if BUF_USES_STACK
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bufptr = buf; bufend = bufptr + sizeof(buf);
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#else
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blen = 0;
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#endif
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}
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ADD("</pre>");
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#if WEBSERVER_CONF_FILESTATS
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static uint16_t numtimes;
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ADD("<br><i>This page sent %u times</i>",++numtimes);
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#endif
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#if WEBSERVER_CONF_LOADTIME
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numticks = clock_time() - numticks + 1;
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ADD(" <i>(%u.%02u sec)</i>",numticks/CLOCK_SECOND,(100*(numticks%CLOCK_SECOND))/CLOCK_SECOND));
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#endif
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SEND_STRING(&s->sout, buf);
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SEND_STRING(&s->sout, BOTTOM);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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httpd_simple_script_t
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httpd_simple_get_script(const char *name)
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{
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return generate_routes;
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}
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#endif /* WEBSERVER */
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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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PRINTA("Server IPv6 addresses:\n");
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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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PRINTA(" ");
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uip_debug_ipaddr_print(&uip_ds6_if.addr_list[i].ipaddr);
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PRINTA("\n");
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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request_prefix(void)
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{
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/* mess up uip_buf with a dirty request... */
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uip_buf[0] = '?';
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uip_buf[1] = 'P';
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uip_len = 2;
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slip_send();
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uip_len = 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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set_prefix_64(uip_ipaddr_t *prefix_64)
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{
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uip_ipaddr_t ipaddr;
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memcpy(&prefix, prefix_64, 16);
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memcpy(&ipaddr, prefix_64, 16);
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prefix_set = 1;
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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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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(border_router_process, ev, data)
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{
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static struct etimer et;
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rpl_dag_t *dag;
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PROCESS_BEGIN();
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/* While waiting for the prefix to be sent through the SLIP connection, the future
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* border router can join an existing DAG as a parent or child, or acquire a default
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* router that will later take precedence over the SLIP fallback interface.
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* Prevent that by turning the radio off until we are initialized as a DAG root.
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*/
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prefix_set = 0;
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NETSTACK_MAC.off(0);
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PROCESS_PAUSE();
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SENSORS_ACTIVATE(button_sensor);
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PRINTF("RPL-Border router started\n");
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#if 0
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/* The border router runs with a 100% duty cycle in order to ensure high
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packet reception rates.
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Note if the MAC RDC is not turned off now, aggressive power management of the
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cpu will interfere with establishing the SLIP connection */
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NETSTACK_MAC.off(1);
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#endif
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/* Request prefix until it has been received */
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while(!prefix_set) {
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etimer_set(&et, CLOCK_SECOND);
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request_prefix();
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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}
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dag = rpl_set_root(RPL_DEFAULT_INSTANCE,(uip_ip6addr_t *)dag_id);
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if(dag != NULL) {
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rpl_set_prefix(dag, &prefix, 64);
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PRINTF("created a new RPL dag\n");
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}
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/* Now turn the radio on, but disable radio duty cycling.
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* Since we are the DAG root, reception delays would constrain mesh throughbut.
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*/
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NETSTACK_MAC.off(1);
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#if DEBUG || 1
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print_local_addresses();
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#endif
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while(1) {
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PROCESS_YIELD();
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if (ev == sensors_event && data == &button_sensor) {
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PRINTF("Initiating global repair\n");
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rpl_repair_root(RPL_DEFAULT_INSTANCE);
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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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