ContikiRPL

/* * Copyright (c) 2011, Swedish Institute of Computer Science. * 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 Institute 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 INSTITUTE 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 INSTITUTE 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. * * This file is part of the Contiki operating system. * */ /** * \file * border-router * \author * Niclas Finne * Joakim Eriksson * Nicolas Tsiftes */ #include "contiki.h" #include "contiki-lib.h" #include "contiki-net.h" #include "net/ip/uip.h" #include "net/ipv6/uip-ds6.h" #include "net/rpl/rpl.h" #include "net/netstack.h" #include "dev/slip.h" #include "cmd.h" #include "border-router.h" #include "border-router-cmds.h" #include #include #include #include #define DEBUG DEBUG_FULL #include "net/ip/uip-debug.h" #define MAX_SENSORS 4 extern long slip_sent; extern long slip_received; static uip_ipaddr_t prefix; static uint8_t prefix_set; static uint8_t mac_set; static uint8_t sensor_count = 0; /* allocate MAX_SENSORS char[32]'s */ static char sensors[MAX_SENSORS][32]; extern int contiki_argc; extern char **contiki_argv; extern const char *slip_config_ipaddr; CMD_HANDLERS(border_router_cmd_handler); PROCESS(border_router_process, "Border router process"); #if WEBSERVER==0 /* No webserver */ AUTOSTART_PROCESSES(&border_router_process,&border_router_cmd_process); #elif WEBSERVER>1 /* Use an external webserver application */ #include "webserver-nogui.h" AUTOSTART_PROCESSES(&border_router_process,&border_router_cmd_process, &webserver_nogui_process); #else /* Use simple webserver with only one page */ #include "httpd-simple.h" PROCESS(webserver_nogui_process, "Web server"); PROCESS_THREAD(webserver_nogui_process, ev, data) { PROCESS_BEGIN(); httpd_init(); while(1) { PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event); httpd_appcall(data); } PROCESS_END(); } AUTOSTART_PROCESSES(&border_router_process,&border_router_cmd_process, &webserver_nogui_process); static const char *TOP = "ContikiRPL\n"; static const char *BOTTOM = "\n"; static char buf[128]; static int blen; #define ADD(...) do { \ blen += snprintf(&buf[blen], sizeof(buf) - blen, __VA_ARGS__); \ } while(0) /*---------------------------------------------------------------------------*/ static void ipaddr_add(const uip_ipaddr_t *addr) { uint16_t a; int i, f; for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) { a = (addr->u8[i] << 8) + addr->u8[i + 1]; if(a == 0 && f >= 0) { if(f++ == 0 && sizeof(buf) - blen >= 2) { buf[blen++] = ':'; buf[blen++] = ':'; } } else { if(f > 0) { f = -1; } else if(i > 0 && blen < sizeof(buf)) { buf[blen++] = ':'; } ADD("%x", a); } } } /*---------------------------------------------------------------------------*/ static PT_THREAD(generate_routes(struct httpd_state *s)) { static int i; static uip_ds6_route_t *r; static uip_ds6_nbr_t *nbr; PSOCK_BEGIN(&s->sout); SEND_STRING(&s->sout, TOP); blen = 0; ADD("Neighbors

");
  for(nbr = nbr_table_head(ds6_neighbors);
      nbr != NULL;
      nbr = nbr_table_next(ds6_neighbors, nbr)) {
    ipaddr_add(&nbr->ipaddr);
    ADD("\n");
    if(blen > sizeof(buf) - 45) {
      SEND_STRING(&s->sout, buf);
      blen = 0;
    }
  }

  ADD("

Routes

");
  SEND_STRING(&s->sout, buf);
  blen = 0;
  for(r = uip_ds6_route_head();
      r != NULL;
      r = uip_ds6_route_next(r)) {
    ipaddr_add(&r->ipaddr);
    ADD("/%u (via ", r->length);
    ipaddr_add(uip_ds6_route_nexthop(r));
    if(r->state.lifetime < 600) {
      ADD(") %lus\n", (unsigned long)r->state.lifetime);
    } else {
      ADD(")\n");
    }
    SEND_STRING(&s->sout, buf);
    blen = 0;
  }
  ADD("

"); //if(blen > 0) { SEND_STRING(&s->sout, buf); // blen = 0; //} if(sensor_count > 0) { ADD("Sensors

");
    SEND_STRING(&s->sout, buf);
    blen = 0;
    for(i = 0; i < sensor_count; i++) {
      ADD("%s\n", sensors[i]);
      SEND_STRING(&s->sout, buf);
      blen = 0;
    }
    ADD("

"); SEND_STRING(&s->sout, buf); } SEND_STRING(&s->sout, BOTTOM); PSOCK_END(&s->sout); } /*---------------------------------------------------------------------------*/ httpd_simple_script_t httpd_simple_get_script(const char *name) { return generate_routes; } #endif /* WEBSERVER */ /*---------------------------------------------------------------------------*/ static void print_local_addresses(void) { int i; uint8_t state; PRINTA("Server IPv6 addresses:\n"); for(i = 0; i < UIP_DS6_ADDR_NB; i++) { state = uip_ds6_if.addr_list[i].state; if(uip_ds6_if.addr_list[i].isused && (state == ADDR_TENTATIVE || state == ADDR_PREFERRED)) { PRINTA(" %p: =>", &uip_ds6_if.addr_list[i]); uip_debug_ipaddr_print(&(uip_ds6_if.addr_list[i]).ipaddr); PRINTA("\n"); } } } /*---------------------------------------------------------------------------*/ static void request_mac(void) { write_to_slip((uint8_t *)"?M", 2); } /*---------------------------------------------------------------------------*/ void border_router_set_mac(const uint8_t *data) { memcpy(uip_lladdr.addr, data, sizeof(uip_lladdr.addr)); linkaddr_set_node_addr((linkaddr_t *)uip_lladdr.addr); /* is this ok - should instead remove all addresses and add them back again - a bit messy... ?*/ uip_ds6_init(); rpl_init(); mac_set = 1; } /*---------------------------------------------------------------------------*/ void border_router_print_stat() { printf("bytes received over SLIP: %ld\n", slip_received); printf("bytes sent over SLIP: %ld\n", slip_sent); } /*---------------------------------------------------------------------------*/ /* Format: ;;...;*/ /* this function just cut at ; and store in the sensor array */ void border_router_set_sensors(const char *data, int len) { int i; int last_pos = 0; int sc = 0; for(i = 0;i < len; i++) { if(data[i] == ';') { sensors[sc][i - last_pos] = 0; memcpy(sensors[sc++], &data[last_pos], i - last_pos); last_pos = i + 1; /* skip the ';' */ } if(sc == MAX_SENSORS) { sensor_count = sc; return; } } sensors[sc][len - last_pos] = 0; memcpy(sensors[sc++], &data[last_pos], len - last_pos); sensor_count = sc; } /*---------------------------------------------------------------------------*/ static void set_prefix_64(const uip_ipaddr_t *prefix_64) { rpl_dag_t *dag; uip_ipaddr_t ipaddr; memcpy(&prefix, prefix_64, 16); memcpy(&ipaddr, prefix_64, 16); prefix_set = 1; uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr); uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF); dag = rpl_set_root(RPL_DEFAULT_INSTANCE, &ipaddr); if(dag != NULL) { rpl_set_prefix(dag, &prefix, 64); PRINTF("created a new RPL dag\n"); } } /*---------------------------------------------------------------------------*/ PROCESS_THREAD(border_router_process, ev, data) { static struct etimer et; PROCESS_BEGIN(); prefix_set = 0; PROCESS_PAUSE(); PRINTF("RPL-Border router started\n"); slip_config_handle_arguments(contiki_argc, contiki_argv); /* tun init is also responsible for setting up the SLIP connection */ tun_init(); while(!mac_set) { etimer_set(&et, CLOCK_SECOND); request_mac(); PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et)); } if(slip_config_ipaddr != NULL) { uip_ipaddr_t prefix; if(uiplib_ipaddrconv((const char *)slip_config_ipaddr, &prefix)) { PRINTF("Setting prefix "); PRINT6ADDR(&prefix); PRINTF("\n"); set_prefix_64(&prefix); } else { PRINTF("Parse error: %s\n", slip_config_ipaddr); exit(0); } } #if DEBUG print_local_addresses(); #endif /* The border router runs with a 100% duty cycle in order to ensure high packet reception rates. */ NETSTACK_MAC.off(1); while(1) { etimer_set(&et, CLOCK_SECOND * 2); PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et)); /* do anything here??? */ } PROCESS_END(); } /*---------------------------------------------------------------------------*/