Exemplo n.º 1
0
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
//  printf("Tcpip: packet_input");
//  rpl_trace(rpl_dataptr_from_packetbuf());
#if UIP_CONF_IP_FORWARD
  if(uip_len > 0) {
    tcpip_is_forwarding = 1;
    if(uip_fw_forward() == UIP_FW_LOCAL) {
      tcpip_is_forwarding = 0;
      check_for_tcp_syn();
      uip_input();
      if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
        uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
        tcpip_ipv6_output();
#else
	PRINTF("tcpip packet_input forward output len %d\n", uip_len);
        tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
      }
    }
    tcpip_is_forwarding = 0;
  }
#else /* UIP_CONF_IP_FORWARD */
  if(uip_len > 0) {
//    printf("Tcpip: packet_input 2");
//    rpl_trace(rpl_dataptr_from_packetbuf());
    if(packetbuf_attr(PACKETBUF_ATTR_IS_ANYCAST)) {
      anycast_packet_received();
    }
    check_for_tcp_syn();
    uip_input();
    if(uip_len > 0) {
//      printf("Tcpip: packet_input 3");
//            rpl_trace(rpl_dataptr_from_packetbuf());
#if UIP_CONF_TCP_SPLIT
      uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
      tcpip_ipv6_output();
#else
      PRINTF("tcpip packet_input output len %d\n", uip_len);
      tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
    }
  }
#endif /* UIP_CONF_IP_FORWARD */
}
Exemplo n.º 2
0
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
  if(uip_len > 0) {

#if UIP_CONF_IP_FORWARD
    tcpip_is_forwarding = 1;
    if(uip_fw_forward() != UIP_FW_LOCAL) {
      tcpip_is_forwarding = 0;
      return;
    }
    tcpip_is_forwarding = 0;
#endif /* UIP_CONF_IP_FORWARD */

    check_for_tcp_syn();
    uip_input();
    if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
      uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if NETSTACK_CONF_WITH_IPV6
      tcpip_ipv6_output();
#else /* NETSTACK_CONF_WITH_IPV6 */
      PRINTF("tcpip packet_input output len %d\n", uip_len);
      tcpip_output();
#endif /* NETSTACK_CONF_WITH_IPV6 */
#endif /* UIP_CONF_TCP_SPLIT */
    }
  }
}
Exemplo n.º 3
0
/*---------------------------------------------------------------------------*/
void
uip_udp_packet_send(struct uip_udp_conn *c, const void *data, int len)
{
#if UIP_UDP
  if(data != NULL) {
    uip_udp_conn = c;
    uip_slen = len;
    memcpy(&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN], data,
           len > UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN?
           UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN: len);
    uip_process(UIP_UDP_SEND_CONN);

#if UIP_CONF_IPV6_MULTICAST
  /* Let the multicast engine process the datagram before we send it */
  if(uip_is_addr_mcast_routable(&uip_udp_conn->ripaddr)) {
    UIP_MCAST6.out();
  }
#endif /* UIP_IPV6_MULTICAST */

#if UIP_CONF_IPV6
    tcpip_ipv6_output();
#else
    if(uip_len > 0) {
      tcpip_output();
    }
#endif
  }
  uip_slen = 0;
#endif /* UIP_UDP */
}
Exemplo n.º 4
0
/*---------------------------------------------------------------------------*/
static uint8_t
packet_input(struct net_buf *buf)
{
  uint8_t ret = 0;
#if UIP_CONF_IP_FORWARD
  if(uip_len > 0) {
    tcpip_is_forwarding = 1;
    if(uip_fw_forward() == UIP_FW_LOCAL) {
      tcpip_is_forwarding = 0;
      check_for_tcp_syn();
      uip_input();
      if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
        uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if NETSTACK_CONF_WITH_IPV6
        tcpip_ipv6_output();
#else
	PRINTF("tcpip packet_input forward output len %d\n", uip_len);
        tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
      }
    }
    tcpip_is_forwarding = 0;
  }
#else /* UIP_CONF_IP_FORWARD */
  if(uip_len(buf) > 0) {
    check_for_tcp_syn(buf);
    ret = uip_input(buf);
    if(ret && uip_len(buf) > 0) {
#if UIP_CONF_TCP_SPLIT
      uip_split_output(buf);
#else /* UIP_CONF_TCP_SPLIT */
#if NETSTACK_CONF_WITH_IPV6
      PRINTF("tcpip packet_input output len %d\n", uip_len(buf));
      ret = tcpip_ipv6_output(buf);
#else
      PRINTF("tcpip packet_input output len %d\n", uip_len(buf));
      ret = tcpip_output(buf, NULL);
#endif
#endif /* UIP_CONF_TCP_SPLIT */
    }
  }
#endif /* UIP_CONF_IP_FORWARD */
  return ret;
}
Exemplo n.º 5
0
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
#if UIP_CONF_IP_FORWARD
    if(uip_len > 0) {
        tcpip_is_forwarding = 1;
        if(uip_fw_forward() == UIP_FW_LOCAL) {
            tcpip_is_forwarding = 0;
            check_for_tcp_syn();
            uip_input();
            if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
                uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
                tcpip_ipv6_output();
#else
                PRINTF("tcpip packet_input forward output len %d\n", uip_len);
                tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
            }
        }
        tcpip_is_forwarding = 0;
    }
#else /* UIP_CONF_IP_FORWARD */
    if(uip_len > 0) {
        check_for_tcp_syn();
        uip_input();
        if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
            uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
            tcpip_ipv6_output();
#else
            PRINTF("tcpip packet_input output len %d\n", uip_len);
            tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
        }
    }
#endif /* UIP_CONF_IP_FORWARD */
}
Exemplo n.º 6
0
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
	if(uip_len > 0) {
		check_for_tcp_syn();
		uip_input();
		if(uip_len > 0) {
#if NETSTACK_CONF_WITH_IPV6
			tcpip_ipv6_output();
#else /* NETSTACK_CONF_WITH_IPV6 */
			tcpip_output();
#endif /* NETSTACK_CONF_WITH_IPV6 */
		}
	}
}
Exemplo n.º 7
0
/*---------------------------------------------------------------------------*/
void
uip_udp_packet_send(struct uip_udp_conn *c, const void *data, int len)
{
#if UIP_UDP
    if(data != NULL) {
        uip_udp_conn = c;
        uip_slen = len;
        memcpy(&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN], data,
               len > UIP_BUFSIZE? UIP_BUFSIZE: len);
        uip_process(UIP_UDP_SEND_CONN);
#if UIP_CONF_IPV6
        tcpip_ipv6_output();
#else
        if(uip_len > 0) {
            tcpip_output();
        }
#endif
    }
    uip_slen = 0;
#endif /* UIP_UDP */
}
Exemplo n.º 8
0
void
tcpip_ipv6_output(void)
{
    uip_ds6_nbr_t *nbr = NULL;
    uip_ipaddr_t *nexthop;

    if(uip_len == 0) {
        return;
    }

    if(uip_len > UIP_LINK_MTU) {
        UIP_LOG("tcpip_ipv6_output: Packet to big");
        uip_len = 0;
        return;
    }

    if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)) {
        UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
        uip_len = 0;
        return;
    }

    if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
        /* Next hop determination */
        nbr = NULL;
        if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)) {
            nexthop = &UIP_IP_BUF->destipaddr;
        } else {
            uip_ds6_route_t* locrt;
            locrt = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
            if(locrt == NULL) {
                if((nexthop = uip_ds6_defrt_choose()) == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
                    PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n",
                           uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
                    if(uip_ext_len > 0) {
                        extern void remove_ext_hdr(void);
                        uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
                        remove_ext_hdr();
                        /* This should be copied from the ext header... */
                        UIP_IP_BUF->proto = proto;
                    }
                    UIP_FALLBACK_INTERFACE.output();
#else
                    PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
                    uip_len = 0;
                    return;
                }
            } else {
                nexthop = &locrt->nexthop;
            }
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
            if(nexthop != NULL) {
                printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
            }
#endif /* TCPIP_CONF_ANNOTATE_TRANSMISSIONS */
        }
        /* End of next hop determination */
#if UIP_CONF_IPV6_RPL
        if(rpl_update_header_final(nexthop)) {
            uip_len = 0;
            return;
        }
#endif /* UIP_CONF_IPV6_RPL */
        if((nbr = uip_ds6_nbr_lookup(nexthop)) == NULL) {
#if UIP_ND6_SEND_NA
            if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE)) == NULL) {
                uip_len = 0;
                return;
            } else {
#if UIP_CONF_IPV6_QUEUE_PKT
                /* Copy outgoing pkt in the queuing buffer for later transmit. */
                if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
                    memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
                    uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
                }
#endif
                /* RFC4861, 7.2.2:
                 * "If the source address of the packet prompting the solicitation is the
                 * same as one of the addresses assigned to the outgoing interface, that
                 * address SHOULD be placed in the IP Source Address of the outgoing
                 * solicitation.  Otherwise, any one of the addresses assigned to the
                 * interface should be used."*/
                if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)) {
                    uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
                } else {
                    uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
                }

                stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
                nbr->nscount = 1;
            }
#endif /* UIP_ND6_SEND_NA */
        } else {
#if UIP_ND6_SEND_NA
            if(nbr->state == NBR_INCOMPLETE) {
                PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
                /* Copy outgoing pkt in the queuing buffer for later transmit and set
                   the destination nbr to nbr. */
                if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
                    memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
                    uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
                }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
                uip_len = 0;
                return;
            }
            /* Send in parallel if we are running NUD (nbc state is either STALE,
               DELAY, or PROBE). See RFC 4861, section 7.7.3 on node behavior. */
            if(nbr->state == NBR_STALE) {
                nbr->state = NBR_DELAY;
                stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
                nbr->nscount = 0;
                PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
            }
#endif /* UIP_ND6_SEND_NA */

            tcpip_output(&nbr->lladdr);

#if UIP_CONF_IPV6_QUEUE_PKT
            /*
             * Send the queued packets from here, may not be 100% perfect though.
             * This happens in a few cases, for example when instead of receiving a
             * NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
             * to STALE, and you must both send a NA and the queued packet.
             */
            if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
                uip_len = uip_packetqueue_buflen(&nbr->packethandle);
                memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
                uip_packetqueue_free(&nbr->packethandle);
                tcpip_output(&nbr->lladdr);
            }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/

            uip_len = 0;
            return;
        }
    }

    /* Multicast IP destination address. */
    tcpip_output(NULL);
    uip_len = 0;
    uip_ext_len = 0;
}
Exemplo n.º 9
0
/*---------------------------------------------------------------------------*/
static void
eventhandler(c_event_t ev, p_data_t data)
{
#if UIP_TCP
  static unsigned char i;
//  register struct listenport *l;
#endif /*UIP_TCP*/

  switch(ev) {
    case EVENT_TYPE_TIMER_EXP:
      /* We get this event if one of our timers have expired. */
      {
        /* Check the clock so see if we should call the periodic uIP
           processing. */
        if(data == &periodic &&
           etimer_expired(&periodic)) {
#if UIP_TCP
          for(i = 0; i < UIP_CONNS; ++i) {
            if(uip_conn_active(i)) {
              /* Only restart the timer if there are active
                 connections. */
              etimer_restart(&periodic);
              uip_periodic(i);
#if NETSTACK_CONF_WITH_IPV6
              tcpip_ipv6_output();
#else
              if(uip_len > 0) {
		PRINTF("tcpip_output from periodic len %d\n\r", uip_len);
                tcpip_output();
		PRINTF("tcpip_output after periodic len %d\n\r", uip_len);
              }
#endif /* NETSTACK_CONF_WITH_IPV6 */
            }
          }
#endif /* UIP_TCP */
#if UIP_CONF_IP_FORWARD
          uip_fw_periodic();
#endif /* UIP_CONF_IP_FORWARD */
        }
        
#if NETSTACK_CONF_WITH_IPV6
#if UIP_CONF_IPV6_REASSEMBLY
        /*
         * check the timer for reassembly
         */
        if(data == &uip_reass_timer &&
           etimer_expired(&uip_reass_timer)) {
          uip_reass_over();
          tcpip_ipv6_output();
        }
#endif /* UIP_CONF_IPV6_REASSEMBLY */
        /*
         * check the different timers for neighbor discovery and
         * stateless autoconfiguration
         */
        /*if(data == &uip_ds6_timer_periodic &&
           etimer_expired(&uip_ds6_timer_periodic)) {
          uip_ds6_periodic();
          tcpip_ipv6_output();
        }*/
#if !UIP_CONF_ROUTER
        if(data == &uip_ds6_timer_rs &&
           etimer_expired(&uip_ds6_timer_rs)) {
          uip_ds6_send_rs();
          tcpip_ipv6_output();
        }
#endif /* !UIP_CONF_ROUTER */
        if(data == &uip_ds6_timer_periodic &&
           etimer_expired(&uip_ds6_timer_periodic)) {
          uip_ds6_periodic();
          tcpip_ipv6_output();
        }
#endif /* NETSTACK_CONF_WITH_IPV6 */
      }
      break;
	 
#if UIP_TCP
    case EVENT_TYPE_TCP_POLL:
      if(data != NULL) {
        uip_poll_conn(data);
#if NETSTACK_CONF_WITH_IPV6
        tcpip_ipv6_output();
#else /* NETSTACK_CONF_WITH_IPV6 */
        if(uip_len > 0) {
        	PRINTF("tcpip_output from tcp poll len %d\n\r", uip_len);
        	tcpip_output();
        }
#endif /* NETSTACK_CONF_WITH_IPV6 */
        /* Start the periodic polling, if it isn't already active. */
        start_periodic_tcp_timer();
      }
      break;
#endif /* UIP_TCP */
#if UIP_UDP
    case EVENT_TYPE_UDP_POLL:
      if(data != NULL) {
        uip_udp_periodic_conn(data);
#if NETSTACK_CONF_WITH_IPV6
        tcpip_ipv6_output();
#else
        if(uip_len > 0) {
          tcpip_output();
        }
#endif /* UIP_UDP */
      }
      break;
#endif /* UIP_UDP */

    case EVENT_TYPE_PCK_INPUT:
      packet_input();
      break;
  };
}
Exemplo n.º 10
0
/*---------------------------------------------------------------------------*/
static void
eventhandler(process_event_t ev, process_data_t data)
{
#if UIP_TCP
    static unsigned char i;
    register struct listenport *l;
#endif /*UIP_TCP*/
    struct process *p;

    switch(ev) {
    case PROCESS_EVENT_EXITED:
        /* This is the event we get if a process has exited. We go through
           the TCP/IP tables to see if this process had any open
           connections or listening TCP ports. If so, we'll close those
           connections. */

        p = (struct process *)data;
#if UIP_TCP
        l = s.listenports;
        for(i = 0; i < UIP_LISTENPORTS; ++i) {
            if(l->p == p) {
                uip_unlisten(l->port);
                l->port = 0;
                l->p = PROCESS_NONE;
            }
            ++l;
        }

        {
            struct uip_conn *cptr;

            for(cptr = &uip_conns[0]; cptr < &uip_conns[UIP_CONNS]; ++cptr) {
                if(cptr->appstate.p == p) {
                    cptr->appstate.p = PROCESS_NONE;
                    cptr->tcpstateflags = UIP_CLOSED;
                }
            }
        }
#endif /* UIP_TCP */
#if UIP_UDP
        {
            struct uip_udp_conn *cptr;

            for(cptr = &uip_udp_conns[0];
                    cptr < &uip_udp_conns[UIP_UDP_CONNS]; ++cptr) {
                if(cptr->appstate.p == p) {
                    cptr->lport = 0;
                }
            }
        }
#endif /* UIP_UDP */
        break;

    case PROCESS_EVENT_TIMER:
        /* We get this event if one of our timers have expired. */
    {
        /* Check the clock so see if we should call the periodic uIP
           processing. */
        if(data == &periodic &&
                etimer_expired(&periodic)) {
#if UIP_TCP
            for(i = 0; i < UIP_CONNS; ++i) {
                if(uip_conn_active(i)) {
                    /* Only restart the timer if there are active
                       connections. */
                    etimer_restart(&periodic);
                    uip_periodic(i);
#if UIP_CONF_IPV6
                    tcpip_ipv6_output();
#else
                    if(uip_len > 0) {
                        PRINTF("tcpip_output from periodic len %d\n", uip_len);
                        tcpip_output();
                        PRINTF("tcpip_output after periodic len %d\n", uip_len);
                    }
#endif /* UIP_CONF_IPV6 */
                }
            }
#endif /* UIP_TCP */
#if UIP_CONF_IP_FORWARD
            uip_fw_periodic();
#endif /* UIP_CONF_IP_FORWARD */
        }

#if UIP_CONF_IPV6
#if UIP_CONF_IPV6_REASSEMBLY
        /*
         * check the timer for reassembly
         */
        if(data == &uip_reass_timer &&
                etimer_expired(&uip_reass_timer)) {
            uip_reass_over();
            tcpip_ipv6_output();
        }
#endif /* UIP_CONF_IPV6_REASSEMBLY */
        /*
         * check the different timers for neighbor discovery and
         * stateless autoconfiguration
         */
        /*if(data == &uip_ds6_timer_periodic &&
           etimer_expired(&uip_ds6_timer_periodic)) {
          uip_ds6_periodic();
          tcpip_ipv6_output();
        }*/
#if !UIP_CONF_ROUTER
        if(data == &uip_ds6_timer_rs &&
                etimer_expired(&uip_ds6_timer_rs)) {
            uip_ds6_send_rs();
            tcpip_ipv6_output();
        }
#endif /* !UIP_CONF_ROUTER */
        if(data == &uip_ds6_timer_periodic &&
                etimer_expired(&uip_ds6_timer_periodic)) {
            uip_ds6_periodic();
            tcpip_ipv6_output();
        }
#endif /* UIP_CONF_IPV6 */
    }
    break;

#if UIP_TCP
    case TCP_POLL:
        if(data != NULL) {
            uip_poll_conn(data);
#if UIP_CONF_IPV6
            tcpip_ipv6_output();
#else /* UIP_CONF_IPV6 */
            if(uip_len > 0) {
                PRINTF("tcpip_output from tcp poll len %d\n", uip_len);
                tcpip_output();
            }
#endif /* UIP_CONF_IPV6 */
            /* Start the periodic polling, if it isn't already active. */
            start_periodic_tcp_timer();
        }
        break;
#endif /* UIP_TCP */
#if UIP_UDP
    case UDP_POLL:
        if(data != NULL) {
            uip_udp_periodic_conn(data);
#if UIP_CONF_IPV6
            tcpip_ipv6_output();
#else
            if(uip_len > 0) {
                tcpip_output();
            }
#endif /* UIP_UDP */
        }
        break;
#endif /* UIP_UDP */

    case PACKET_INPUT:
        packet_input();
        break;
    };
}
Exemplo n.º 11
0
/* -----------------------------------------------------------------------------
 * \brief      Deliver an incoming packet to the TCP/IP stack
 *
 *             This function is called by theServer to
 *             deliver an incoming packet to the TCP/IP stack. The
 *             incoming packet must be present in the uip_buf buffer,
 *             and the length of the packet must be in the global
 *             uip_len variable.
 * -------------------------------------------------------------------------- */
void xtcpip_input(chanend mac_tx)
{
/*_______________*/
#if UIP_CONF_IPV4 /* ORIGINAL_XMOS */
	if (BUF->type == htons(UIP_ETHTYPE_IP)) {
		uip_arp_ipin();
		uip_input();
		if (uip_len > 0) {
			if (uip_udpconnection()
				&& (TCPBUF->proto != UIP_PROTO_ICMP)
				&& (TCPBUF->proto != UIP_PROTO_IGMP))
				uip_arp_out( uip_udp_conn);
			else
				uip_arp_out( NULL);
			xtcp_tx_buffer(mac_tx);
		}
	} else if (BUF->type == htons(UIP_ETHTYPE_ARP)) {
		uip_arp_arpin();

		if (uip_len > 0) {
			xtcp_tx_buffer(mac_tx);
		}
		for (int i = 0; i < UIP_UDP_CONNS; i++) {
			uip_udp_arp_event(i);
			if (uip_len > 0) {
				uip_arp_out(&uip_udp_conns[i]);
				xtcp_tx_buffer(mac_tx);
			}
		}
	}
#endif /* UIP_CONF_IPV4 ORIGINAL_XMOS */
/*_______________*/
	/* contiki tcpip.c */
#if UIP_CONF_IP_FORWARD
  if(uip_len > 0) {
    tcpip_is_forwarding = 1;
    if(uip_fw_forward() == UIP_FW_LOCAL) {
      tcpip_is_forwarding = 0;
      check_for_tcp_syn();
      uip_input();
      if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
        uip_split_output(mac_tx);
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
        xtcpip_ipv6_output(mac_tx);
#else
	PRINTF("tcpip packet_input forward output len %d\n", uip_len);
        xtcpip_output(mac_tx);
#endif
#endif /* UIP_CONF_TCP_SPLIT */
      }
    }
    tcpip_is_forwarding = 0;
  }
#else /* UIP_CONF_IP_FORWARD */
  if(uip_len > 0) {
    uip_input();
    if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
      uip_split_output(mac_tx);
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
      xtcpip_ipv6_output(mac_tx);
#else
      PRINTF("tcpip packet_input output len %d\n", uip_len);
      tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
    }
  }
#endif /* UIP_CONF_IP_FORWARD */
}
Exemplo n.º 12
0
void
tcpip_ipv6_output(void)
{
  uip_ds6_nbr_t *nbr = NULL;
  uip_ipaddr_t* nexthop;
  
  if(uip_len == 0) {
    return;
  }
  
  if(uip_len > UIP_LINK_MTU) {
    UIP_LOG("tcpip_ipv6_output: Packet to big");
    uip_len = 0;
    return;
  }
  if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
    UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
    uip_len = 0;
    return;
  }
  if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
    /* Next hop determination */
    nbr = NULL;
    if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
      nexthop = &UIP_IP_BUF->destipaddr;
    } else {
      uip_ds6_route_t* locrt;
      locrt = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
      if(locrt == NULL) {
        if((nexthop = uip_ds6_defrt_choose()) == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
	  UIP_FALLBACK_INTERFACE.output();
#else
          PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif
          uip_len = 0;
          return;
        }
      } else {
        nexthop = &locrt->nexthop;
      }
    }
    /* end of next hop determination */
   // if((nbr = uip_ds6_nbr_lookup(nexthop)) == NULL) {
	if(0){
	/* 
	 * I-D.ietf.6lowpan-nd 5.7: As all prefixes but the link-local prefix are
	 * always assumed to be off-link, multicast-based address resolution between
	 * neighbors is not needed.
	 * In addition, there are neither INCOMPLETE, STALE, DELAY, nor PROBE NCEs 
	 * in 6LoWPAN-ND.
	 */	
		return;
    } else {
    	tcpip_output(&(nbr->lladdr));
      uip_len = 0;
      return;
    }
  }
   
  /*multicast IP destination address */
  tcpip_output(NULL);
  uip_len = 0;
  uip_ext_len = 0;
   
}
Exemplo n.º 13
0
void
tcpip_ipv6_output(void)
{
  uip_ds6_nbr_t *nbr = NULL;
  uip_ipaddr_t *nexthop;

  if(uip_len == 0) {
    return;
  }

  if(uip_len > UIP_LINK_MTU) {
    UIP_LOG("tcpip_ipv6_output: Packet to big");
    uip_clear_buf();
    return;
  }

  if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
    UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
    uip_clear_buf();
    return;
  }

  if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
    /* Next hop determination */
    nbr = NULL;

    /* We first check if the destination address is on our immediate
       link. If so, we simply use the destination address as our
       nexthop address. */
    if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
      nexthop = &UIP_IP_BUF->destipaddr;
    } else {
      uip_ds6_route_t *route;
      /* Check if we have a route to the destination address. */
      route = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);

      /* No route was found - we send to the default route instead. */
      if(route == NULL) {
        PRINTF("tcpip_ipv6_output: no route found, using default route\n");
        nexthop = uip_ds6_defrt_choose();
        if(nexthop == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
	  PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n", 
		 uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
	  if(uip_ext_len > 0) {
	    extern void remove_ext_hdr(void);
	    uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
	    remove_ext_hdr();
	    /* This should be copied from the ext header... */
	    UIP_IP_BUF->proto = proto;
	  }
	  /* Inform the other end that the destination is not reachable. If it's
	   * not informed routes might get lost unexpectedly until there's a need
	   * to send a new packet to the peer */
	  if(UIP_FALLBACK_INTERFACE.output() < 0) {
	    PRINTF("FALLBACK: output error. Reporting DST UNREACH\n");
	    uip_icmp6_error_output(ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR, 0);
	    uip_flags = 0;
	    tcpip_ipv6_output();
	    return;
	  }
#else
          PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
          uip_clear_buf();
          return;
        }

      } else {
        /* A route was found, so we look up the nexthop neighbor for
           the route. */
        nexthop = uip_ds6_route_nexthop(route);

        /* If the nexthop is dead, for example because the neighbor
           never responded to link-layer acks, we drop its route. */
        if(nexthop == NULL) {
#if UIP_CONF_IPV6_RPL
          /* If we are running RPL, and if we are the root of the
             network, we'll trigger a global repair berfore we remove
             the route. */
          rpl_dag_t *dag;
          rpl_instance_t *instance;

          dag = (rpl_dag_t *)route->state.dag;
          if(dag != NULL) {
            instance = dag->instance;

            rpl_repair_root(instance->instance_id);
          }
#endif /* UIP_CONF_IPV6_RPL */
          uip_ds6_route_rm(route);

          /* We don't have a nexthop to send the packet to, so we drop
             it. */
          return;
        }
      }
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
      if(nexthop != NULL) {
        static uint8_t annotate_last;
        static uint8_t annotate_has_last = 0;

        if(annotate_has_last) {
          printf("#L %u 0; red\n", annotate_last);
        }
        printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
        annotate_last = nexthop->u8[sizeof(uip_ipaddr_t) - 1];
        annotate_has_last = 1;
      }
#endif /* TCPIP_CONF_ANNOTATE_TRANSMISSIONS */
    }

    /* End of next hop determination */

#if UIP_CONF_IPV6_RPL
    if(rpl_update_header_final(nexthop)) {
      uip_clear_buf();
      return;
    }
#endif /* UIP_CONF_IPV6_RPL */
    nbr = uip_ds6_nbr_lookup(nexthop);
    if(nbr == NULL) {
#if UIP_ND6_SEND_NA
      if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE)) == NULL) {
        uip_clear_buf();
        return;
      } else {
#if UIP_CONF_IPV6_QUEUE_PKT
        /* Copy outgoing pkt in the queuing buffer for later transmit. */
        if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
          memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
          uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
        }
#endif
      /* RFC4861, 7.2.2:
       * "If the source address of the packet prompting the solicitation is the
       * same as one of the addresses assigned to the outgoing interface, that
       * address SHOULD be placed in the IP Source Address of the outgoing
       * solicitation.  Otherwise, any one of the addresses assigned to the
       * interface should be used."*/
       if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)){
          uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
        } else {
          uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
        }

        stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
        nbr->nscount = 1;
        /* Send the first NS try from here (multicast destination IP address). */
      }
#else /* UIP_ND6_SEND_NA */
      uip_len = 0;
      return;  
#endif /* UIP_ND6_SEND_NA */
    } else {
#if UIP_ND6_SEND_NA
      if(nbr->state == NBR_INCOMPLETE) {
        PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
        /* Copy outgoing pkt in the queuing buffer for later transmit and set
           the destination nbr to nbr. */
        if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
          memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
          uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
        }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
        uip_clear_buf();
        return;
      }
      /* Send in parallel if we are running NUD (nbc state is either STALE,
         DELAY, or PROBE). See RFC 4861, section 7.3.3 on node behavior. */
      if(nbr->state == NBR_STALE) {
        nbr->state = NBR_DELAY;
        stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
        nbr->nscount = 0;
        PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
      }
#endif /* UIP_ND6_SEND_NA */

      tcpip_output(uip_ds6_nbr_get_ll(nbr));

#if UIP_CONF_IPV6_QUEUE_PKT
      /*
       * Send the queued packets from here, may not be 100% perfect though.
       * This happens in a few cases, for example when instead of receiving a
       * NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
       * to STALE, and you must both send a NA and the queued packet.
       */
      if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
        uip_len = uip_packetqueue_buflen(&nbr->packethandle);
        memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
        uip_packetqueue_free(&nbr->packethandle);
        tcpip_output(uip_ds6_nbr_get_ll(nbr));
      }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/

      uip_clear_buf();
      return;
    }
  }
  /* Multicast IP destination address. */
  tcpip_output(NULL);
  uip_clear_buf();
}
Exemplo n.º 14
0
/*-----------------------------------------------------------------------------*/
void
uip_split_output(void)
{
  u16_t tcplen, len1, len2;

  /* We only try to split maximum sized TCP segments. */
  if(BUF->proto == UIP_PROTO_TCP &&
     uip_len == UIP_BUFSIZE - UIP_LLH_LEN) {

    tcplen = uip_len - UIP_TCPIP_HLEN;
    /* Split the segment in two. If the original packet length was
       odd, we make the second packet one byte larger. */
    len1 = len2 = tcplen / 2;
    if(len1 + len2 < tcplen) {
      ++len2;
    }

    /* Create the first packet. This is done by altering the length
       field of the IP header and updating the checksums. */
    uip_len = len1 + UIP_TCPIP_HLEN;
#if UIP_CONF_IPV6
    /* For IPv6, the IP length field does not include the IPv6 IP header
       length. */
    BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
    BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
#else /* UIP_CONF_IPV6 */
    BUF->len[0] = uip_len >> 8;
    BUF->len[1] = uip_len & 0xff;
#endif /* UIP_CONF_IPV6 */
    
    /* Recalculate the TCP checksum. */
    BUF->tcpchksum = 0;
    BUF->tcpchksum = ~(uip_tcpchksum());

#if !UIP_CONF_IPV6
    /* Recalculate the IP checksum. */
    BUF->ipchksum = 0;
    BUF->ipchksum = ~(uip_ipchksum());
#endif /* UIP_CONF_IPV6 */
    
    /* Transmit the first packet. */
    /*    uip_fw_output();*/
    tcpip_output();

    /* Now, create the second packet. To do this, it is not enough to
       just alter the length field, but we must also update the TCP
       sequence number and point the uip_appdata to a new place in
       memory. This place is detemined by the length of the first
       packet (len1). */
    uip_len = len2 + UIP_TCPIP_HLEN;
#if UIP_CONF_IPV6
    /* For IPv6, the IP length field does not include the IPv6 IP header
       length. */
    BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
    BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
#else /* UIP_CONF_IPV6 */
    BUF->len[0] = uip_len >> 8;
    BUF->len[1] = uip_len & 0xff;
#endif /* UIP_CONF_IPV6 */
    
    /*    uip_appdata += len1;*/
    memcpy(uip_appdata, (u8_t *)uip_appdata + len1, len2);

    uip_add32(BUF->seqno, len1);
    BUF->seqno[0] = uip_acc32[0];
    BUF->seqno[1] = uip_acc32[1];
    BUF->seqno[2] = uip_acc32[2];
    BUF->seqno[3] = uip_acc32[3];
    
    /* Recalculate the TCP checksum. */
    BUF->tcpchksum = 0;
    BUF->tcpchksum = ~(uip_tcpchksum());

#if !UIP_CONF_IPV6
    /* Recalculate the IP checksum. */
    BUF->ipchksum = 0;
    BUF->ipchksum = ~(uip_ipchksum());
#endif /* UIP_CONF_IPV6 */

    /* Transmit the second packet. */
    /*    uip_fw_output();*/
    tcpip_output();
  } else {
Exemplo n.º 15
0
Arquivo: tcpip.c Projeto: adutze/6lbr
void
tcpip_ipv6_output(void)
{
  uip_ds6_nbr_t *nbr = NULL;
  uip_ipaddr_t *nexthop;
  uip_ds6_route_t *route = NULL;

  if(uip_len == 0) {
    return;
  }

  PRINTF("IPv6 packet send from ");
  PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
  PRINTF(" to ");
  PRINT6ADDR(&UIP_IP_BUF->destipaddr);
  PRINTF("\n");

  if(uip_len > UIP_LINK_MTU) {
    UIP_LOG("tcpip_ipv6_output: Packet to big");
    uip_clear_buf();
    return;
  }

  if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
    UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
    uip_clear_buf();
    return;
  }

  if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
    /* Next hop determination */
    nbr = NULL;

    /* We first check if the destination address is on our immediate
       link. If so, we simply use the destination address as our
       nexthop address. */
    if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
      nexthop = &UIP_IP_BUF->destipaddr;
    } else {
      /* Check if we have a route to the destination address. */
      route = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);

      /* No route was found - we send to the default route instead. */
      if(route == NULL) {
#if CETIC_6LBR_SMARTBRIDGE
        if (uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64)) {
          /* In smart-bridge mode, there is no route towards hosts on the Ethernet side
          Therefore we have to check the destination and assume the host is on-link */
          nexthop = &UIP_IP_BUF->destipaddr;
        } else
#endif
#if CETIC_6LBR_ROUTER && UIP_CONF_IPV6_RPL
        if (is_dodag_root() && uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64)) {
          //In router mode, we drop packets towards unknown mote
          PRINTF("Dropping wsn packet with no route\n");
          uip_len = 0;
          return;
        } else
#endif
#if CETIC_6LBR_IP64
        if(ip64_addr_is_ip64(&UIP_IP_BUF->destipaddr)) {
#if UIP_CONF_IPV6_RPL
          rpl_remove_header();
#endif
          IP64_CONF_UIP_FALLBACK_INTERFACE.output();
          uip_len = 0;
          uip_ext_len = 0;
          return;
        }
        else
#endif
        {
          PRINTF("tcpip_ipv6_output: no route found, using default route\n");
          nexthop = uip_ds6_defrt_choose();
        }
        if(nexthop == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
	  PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n", 
		 uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
	  if(uip_ext_len > 0) {
	    extern void remove_ext_hdr(void);
	    uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
	    remove_ext_hdr();
	    /* This should be copied from the ext header... */
	    UIP_IP_BUF->proto = proto;
	  }
	  UIP_FALLBACK_INTERFACE.output();
#else
          PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
          uip_clear_buf();
          return;
        }

      } else {
        /* A route was found, so we look up the nexthop neighbor for
           the route. */
        nexthop = uip_ds6_route_nexthop(route);

        /* If the nexthop is dead, for example because the neighbor
           never responded to link-layer acks, we drop its route. */
        if(nexthop == NULL) {
#if UIP_CONF_IPV6_RPL
          /* If we are running RPL, and if we are the root of the
             network, we'll trigger a DIO before we remove
             the route. */
          rpl_dag_t *dag;

          dag = (rpl_dag_t *)route->state.dag;
          if(dag != NULL) {
            rpl_reset_dio_timer(dag->instance);
          }
#endif /* UIP_CONF_IPV6_RPL */
          uip_ds6_route_rm(route);

          /* We don't have a nexthop to send the packet to, so we drop
             it. */
          return;
        }
      }
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
      if(nexthop != NULL) {
        static uint8_t annotate_last;
        static uint8_t annotate_has_last = 0;

        if(annotate_has_last) {
          printf("#L %u 0; red\n", annotate_last);
        }
        printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
        annotate_last = nexthop->u8[sizeof(uip_ipaddr_t) - 1];
        annotate_has_last = 1;
      }
#endif /* TCPIP_CONF_ANNOTATE_TRANSMISSIONS */
    }

    /* End of next hop determination */

#if UIP_CONF_IPV6_RPL
    if(rpl_update_header_final(nexthop)) {
      uip_clear_buf();
      return;
    }
#endif /* UIP_CONF_IPV6_RPL */
    nbr = uip_ds6_nbr_lookup(nexthop);
    if(nbr == NULL) {
#if UIP_ND6_SEND_NA
#if CETIC_6LBR && UIP_CONF_IPV6_RPL
      /* Don't perform NUD if it has been disabled for WSN */
      if((nvm_data.global_flags & CETIC_GLOBAL_DISABLE_WSN_NUD) != 0 &&
         uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64) &&
         route != NULL) {
        uip_clear_buf();
        return;
      }
#endif
      if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE)) == NULL) {
        uip_clear_buf();
        return;
      } else {
#if UIP_CONF_IPV6_QUEUE_PKT
        /* Copy outgoing pkt in the queuing buffer for later transmit. */
        if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
          memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
          uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
        }
#endif
      /* RFC4861, 7.2.2:
       * "If the source address of the packet prompting the solicitation is the
       * same as one of the addresses assigned to the outgoing interface, that
       * address SHOULD be placed in the IP Source Address of the outgoing
       * solicitation.  Otherwise, any one of the addresses assigned to the
       * interface should be used."*/
       if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)){
          uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
        } else {
          uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
        }

        stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
        nbr->nscount = 1;
        /* Send the first NS try from here (multicast destination IP address). */
      }
#else /* UIP_ND6_SEND_NA */
      uip_len = 0;
      return;  
#endif /* UIP_ND6_SEND_NA */
    } else {
#if UIP_ND6_SEND_NA
      if(nbr->state == NBR_INCOMPLETE) {
        PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
        /* Copy outgoing pkt in the queuing buffer for later transmit and set
           the destination nbr to nbr. */
        if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
          memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
          uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
        }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
        uip_clear_buf();
        return;
      }
      /* Send in parallel if we are running NUD (nbc state is either STALE,
         DELAY, or PROBE). See RFC 4861, section 7.3.3 on node behavior. */
#if CETIC_6LBR && UIP_CONF_IPV6_RPL
      /* Don't update nbr state if we don't want to perform NUD for WSN */
      if((nvm_data.global_flags & CETIC_GLOBAL_DISABLE_WSN_NUD) == 0 ||
         !uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64) ||
         route == NULL)
#endif
      if(nbr->state == NBR_STALE) {
        nbr->state = NBR_DELAY;
        stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
        nbr->nscount = 0;
        PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
      }
#endif /* UIP_ND6_SEND_NA */

      tcpip_output(uip_ds6_nbr_get_ll(nbr));

#if UIP_CONF_IPV6_QUEUE_PKT
      /*
       * Send the queued packets from here, may not be 100% perfect though.
       * This happens in a few cases, for example when instead of receiving a
       * NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
       * to STALE, and you must both send a NA and the queued packet.
       */
      if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
        uip_len = uip_packetqueue_buflen(&nbr->packethandle);
        memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
        uip_packetqueue_free(&nbr->packethandle);
        tcpip_output(uip_ds6_nbr_get_ll(nbr));
      }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/

      uip_clear_buf();
      return;
    }
  }
  /* Multicast IP destination address. */
  tcpip_output(NULL);
  uip_clear_buf();
}
Exemplo n.º 16
0
/* -----------------------------------------------------------------------------
 * Process periodical stuff.
 *
 * In contiki, this is handlet by the eventhandler of the tcpip.c file
 * with the process event "PROCESS_EVENT_TIMER".
 * -------------------------------------------------------------------------- */
void xtcp_process_timer(chanend mac_tx, xtcp_tmr_event_type_t event)
{
#if UIP_IGMP
  igmp_periodic();
  if(uip_len > 0) {
    xtcp_tx_buffer(mac_tx);
  }
#endif

  if(event == XTCP_TMR_PERIODIC) {
#if UIP_TCP
    for(int i = 0; i < UIP_CONNS; ++i) {
      if(uip_conn_active(i)) {
        uip_periodic(i);
#if UIP_CONF_IPV6
        xtcpip_ipv6_output(mac_tx);
#else
        if(uip_len > 0) {
          PRINTF("tcpip_output from periodic len %d\n", uip_len);
          tcpip_output();
          PRINTF("tcpip_output after periodic len %d\n", uip_len);
        }
#endif /* UIP_CONF_IPV6 */
      }
    }
#endif /* UIP_TCP */
#if UIP_CONF_IP_FORWARD
    uip_fw_periodic();
#endif /* UIP_CONF_IP_FORWARD */
  }
  /*XXX CHSC HACK*/
#if UIP_CONF_IPV6
#if UIP_CONF_IPV6_REASSEMBLY
        /*
         * check the timer for reassembly
         */
        if(etimer_expired(&uip_reass_timer)) {
          uip_reass_over();
          tcpip_ipv6_output();
        }
#endif /* UIP_CONF_IPV6_REASSEMBLY */
        /*
         * check the different timers for neighbor discovery and
         * stateless autoconfiguration
         */
        /*if(data == &uip_ds6_timer_periodic &&
           etimer_expired(&uip_ds6_timer_periodic)) {
          uip_ds6_periodic();
          tcpip_ipv6_output();
        }*/
#if !UIP_CONF_ROUTER
        if(etimer_expired(&uip_ds6_timer_rs)) {
          uip_ds6_send_rs();
          xtcpip_ipv6_output(mac_tx);
        }
#endif /* !UIP_CONF_ROUTER */
        if(etimer_expired(&uip_ds6_timer_periodic)) {
          uip_ds6_periodic();
          xtcpip_ipv6_output(mac_tx);
        }
#endif /* UIP_CONF_IPV6 */

}
Exemplo n.º 17
0
void
tcpip_ipv6_output(void)
{
  struct uip_nd6_neighbor *nbc = NULL;
  struct uip_nd6_defrouter *dr = NULL;
  
  if(uip_len == 0)
    return;

  if(uip_len > UIP_LINK_MTU){
    UIP_LOG("tcpip_ipv6_output: Packet to big");
    uip_len = 0;
    return;
  }
  if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
    UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
    uip_len = 0;
    return;
  }
  if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
    /*If destination is on link */
    nbc = NULL;
    if(uip_nd6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
      nbc = uip_nd6_nbrcache_lookup(&UIP_IP_BUF->destipaddr);
    } else {
#if UIP_CONF_ROUTER
      /*destination is not on link*/
      uip_ipaddr_t ipaddr;
      uip_ipaddr_t *next_hop;

      /* Try to find the next hop address in the local routing table. */
      next_hop = uip_router != NULL ?
        uip_router->lookup(&UIP_IP_BUF->destipaddr, &ipaddr) : NULL;
      if(next_hop != NULL) {
        /* Look for the next hop of the route in the neighbor cache.
           Add a cache entry if we can't find it. */
        nbc = uip_nd6_nbrcache_lookup(next_hop);
        if(nbc == NULL) {
          nbc = uip_nd6_nbrcache_add(next_hop, NULL, 1, NO_STATE);
        }
      } else {
#endif /* UIP_CONF_ROUTER */
        /* No route found, check if a default router exists and use it then. */
        dr = uip_nd6_choose_defrouter();
        if(dr != NULL){
          nbc = dr->nb;
        } else {
          /* shall we send a icmp error message destination unreachable ?*/
          UIP_LOG("tcpip_ipv6_output: Destination off-link but no router");
          uip_len = 0;
          return;
        }
#if UIP_CONF_ROUTER
      }
#endif /* UIP_CONF_ROUTER */
    }
    /* there are two cases where the entry logically does not exist:
     * 1 it really does not exist. 2 it is in the NO_STATE state */
    if (nbc == NULL || nbc->state == NO_STATE) {
      if (nbc == NULL) {
        /* create neighbor cache entry, original packet is replaced by NS*/
        nbc = uip_nd6_nbrcache_add(&UIP_IP_BUF->destipaddr, NULL, 0, INCOMPLETE);
      } else {
        nbc->state = INCOMPLETE;
      }
#if UIP_CONF_IPV6_QUEUE_PKT
      /* copy outgoing pkt in the queuing buffer for later transmmit */
      memcpy(nbc->queue_buf, UIP_IP_BUF, uip_len);
      nbc->queue_buf_len = uip_len;
#endif
      /* RFC4861, 7.2.2:
       * "If the source address of the packet prompting the solicitation is the
       * same as one of the addresses assigned to the outgoing interface, that
       * address SHOULD be placed in the IP Source Address of the outgoing
       * solicitation.  Otherwise, any one of the addresses assigned to the
       * interface should be used."*/
      if(uip_netif_is_addr_my_unicast(&UIP_IP_BUF->srcipaddr)){
        uip_nd6_io_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbc->ipaddr);
      } else {
        uip_nd6_io_ns_output(NULL, NULL, &nbc->ipaddr);
      }

      stimer_set(&(nbc->last_send),
                uip_netif_physical_if.retrans_timer / 1000);
      nbc->count_send = 1;
    } else {
      if (nbc->state == INCOMPLETE){
        PRINTF("tcpip_ipv6_output: neighbor cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
        /* copy outgoing pkt in the queuing buffer for later transmmit and set
           the destination neighbor to nbc */
        memcpy(nbc->queue_buf, UIP_IP_BUF, uip_len);
        nbc->queue_buf_len = uip_len;
        uip_len = 0;
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
        return;
      }
      /* if running NUD (nbc->state == STALE, DELAY, or PROBE ) keep
         sending in parallel see rfc 4861 Node behavior in section 7.7.3*/
	 
      if (nbc->state == STALE){
        nbc->state = DELAY;
        stimer_set(&(nbc->reachable),
                  UIP_ND6_DELAY_FIRST_PROBE_TIME);
        PRINTF("tcpip_ipv6_output: neighbor cache entry stale moving to delay\n");
      }
      
      stimer_set(&(nbc->last_send),
                uip_netif_physical_if.retrans_timer / 1000);
      
      tcpip_output(&(nbc->lladdr));


#if UIP_CONF_IPV6_QUEUE_PKT
      /* Send the queued packets from here, may not be 100% perfect though.
       * This happens in a few cases, for example when instead of receiving a
       * NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
       *to STALE, and you must both send a NA and the queued packet
       */
      if(nbc->queue_buf_len != 0) {
        uip_len = nbc->queue_buf_len;
        memcpy(UIP_IP_BUF, nbc->queue_buf, uip_len);
        nbc->queue_buf_len = 0;
        tcpip_output(&(nbc->lladdr));
      }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/

      uip_len = 0;
      return;
    }
  }
   
  /*multicast IP destination address */
  tcpip_output(NULL);
  uip_len = 0;
  uip_ext_len = 0;
   
}
Exemplo n.º 18
0
/**
 * \brief   Take a packet received over the ethernet link, and send it
 * out over 802.15.4
 */
void mac_ethernetToLowpan(uint8_t * ethHeader)
{
  //Dest address
  uip_lladdr_t destAddr;
  uip_lladdr_t *destAddrPtr = NULL;

  PRINTF("Packet type: 0x%04x\n\r", uip_ntohs(((struct uip_eth_hdr *) ethHeader)->type));

   //RUM doesn't support sending data
   #if UIP_CONF_USE_RUM
   return;
   #endif

  /* In sniffer or sneezr mode we don't ever send anything */
  if ((usbstick_mode.sendToRf == 0) || (usbstick_mode.sneeze != 0)) {
    uip_len = 0;
    return;
  }


  /* If not IPv6 we don't do anything. Disable ipv4 on the interface to prevent possible hangs from discovery packet flooding */
  if (((struct uip_eth_hdr *) ethHeader)->type != UIP_HTONS(UIP_ETHTYPE_IPV6)) {
    PRINTF("eth2low: Dropping packet w/type=0x%04x\n",uip_ntohs(((struct uip_eth_hdr *) ethHeader)->type));
  //      printf("!ipv6");

#if !RF230BB && !RF212BB
    usb_eth_stat.txbad++;
#endif
    uip_len = 0;
    return;
  }

  /* IPv6 uses 33-33-xx-xx-xx-xx prefix for multicast ND stuff */
  if ( (((struct uip_eth_hdr *) ethHeader)->dest.addr[0] == 0x33) &&
       (((struct uip_eth_hdr *) ethHeader)->dest.addr[1] == 0x33) )
  {
    PRINTF("eth2low: Ethernet multicast packet received\n\r");
    ;//Do Nothing
  } else if ( (((struct uip_eth_hdr *) ethHeader)->dest.addr[0] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[1] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[2] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[3] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[4] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[5] == 0xFF) ) {
    /* IPv6 does not use broadcast addresses, hence this should not happen */
    PRINTF("eth2low: Dropping broadcast packet\n\r");

#if !RF230BB && !RF212BB
    usb_eth_stat.txbad++;
#endif
    uip_len = 0;
    return;
  } else {

  /* Simple Address Translation */
  if(memcmp((uint8_t *)&simple_trans_ethernet_addr, &(((struct uip_eth_hdr *) ethHeader)->dest.addr[0]), 6) == 0) {
#if UIP_CONF_IPV6
        //Addressed to us: make 802.15.4 address from IPv6 Address
        destAddr.addr[0] = UIP_IP_BUF->destipaddr.u8[8] ^ 0x02;
        destAddr.addr[1] = UIP_IP_BUF->destipaddr.u8[9];
        destAddr.addr[2] = UIP_IP_BUF->destipaddr.u8[10];
        destAddr.addr[3] = UIP_IP_BUF->destipaddr.u8[11];
        destAddr.addr[4] = UIP_IP_BUF->destipaddr.u8[12];
        destAddr.addr[5] = UIP_IP_BUF->destipaddr.u8[13];
        destAddr.addr[6] = UIP_IP_BUF->destipaddr.u8[14];
        destAddr.addr[7] = UIP_IP_BUF->destipaddr.u8[15];
#else
		//Not intended to be functional, but allows ip4 build without errors.
        destAddr.addr[0] = UIP_IP_BUF->destipaddr.u8[0] ^ 0x02;
        destAddr.addr[1] = UIP_IP_BUF->destipaddr.u8[1];
        destAddr.addr[2] = UIP_IP_BUF->destipaddr.u8[2];
        destAddr.addr[3] = UIP_IP_BUF->destipaddr.u8[3];
        destAddr.addr[4] = UIP_IP_BUF->destipaddr.u8[0];
        destAddr.addr[5] = UIP_IP_BUF->destipaddr.u8[1];
        destAddr.addr[6] = UIP_IP_BUF->destipaddr.u8[2];
        destAddr.addr[7] = UIP_IP_BUF->destipaddr.u8[3];

#endif

        destAddrPtr = &destAddr;
  }
#if UIP_CONF_SIMPLE_JACKDAW_ADDR_TRANS
  else {
        //Not addressed to us
        uip_len = 0;
        return;
  }
#else

    /* Complex Address Translation */
    PRINTF("eth2low: Addressed packet received... ");
    //Check this returns OK
    if (mac_createSicslowpanLongAddr( &(((struct uip_eth_hdr *) ethHeader)->dest.addr[0]), &destAddr) == 0) {
      PRINTF(" translation failed\n\r");

#if !RF230BB && !RF212BB
      usb_eth_stat.txbad++;
#endif
      uip_len = 0;
      return;
    }
    PRINTF(" translated OK\n\r");
    destAddrPtr = &destAddr;
#endif /* UIP_CONF_SIMPLE_JACKDAW_ADDR_TRANS */


  }

  //Remove header from length before passing onward
  uip_len -= UIP_LLH_LEN;

  //Some IP packets have link layer in them, need to change them around!
  if (usbstick_mode.translate) {
#if DEBUG
    uint8_t transReturn = mac_translateIPLinkLayer(ll_802154_type);
    PRINTF("IPTranslation: returns %d\n\r", transReturn);
#else
    mac_translateIPLinkLayer(ll_802154_type);
#endif
  }

#if UIP_CONF_IPV6
/* Send the packet to the uip6 stack if it exists, else send to 6lowpan */
#if UIP_CONF_IPV6_RPL
/* Save the destination address, to trap ponging it back to the interface */
  uip_ipaddr_copy(&last_sender, &UIP_IP_BUF->srcipaddr);
  tcpip_input();
  tcpip_output(destAddrPtr);
#else
//  PRINTF("Input from %x %x %x %x %x %x %x %x\n",UIP_IP_BUF->srcipaddr.u8[0],UIP_IP_BUF->srcipaddr.u8[1],UIP_IP_BUF->srcipaddr.u8[2],UIP_IP_BUF->srcipaddr.u8[3],UIP_IP_BUF->srcipaddr.u8[4],UIP_IP_BUF->srcipaddr.u8[5],UIP_IP_BUF->srcipaddr.u8[6],UIP_IP_BUF->srcipaddr.u8[7]);
//  PRINTF("Output to %x %x %x %x %x %x %x %x\n",destAddr.addr[0],destAddr.addr[1],destAddr.addr[2],destAddr.addr[3],destAddr.addr[4],destAddr.addr[5],destAddr.addr[6],destAddr.addr[7]);
  tcpip_output(destAddrPtr);
#endif
#else  /* UIP_CONF_IPV6 */
  tcpip_output();    //Allow non-ipv6 builds (Hello World) 
#endif /* UIP_CONF_IPV6 */

#if !RF230BB && !RF212BB
  usb_eth_stat.txok++;
#endif
  uip_len = 0;

}
Exemplo n.º 19
0
void
tcpip_ipv6_output(void)
{
    static uip_ds6_nbr_t *nbr = NULL;
    static uip_ipaddr_t* nexthop;

    if(uip_len == 0) {
        return;
    }

    if(uip_len > UIP_LINK_MTU) {
        UIP_LOG("tcpip_ipv6_output: Packet to big");
        uip_len = 0;
        return;
    }
    if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)) {
        UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
        uip_len = 0;
        return;
    }
    if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
        /* Next hop determination */
        nbr = NULL;
        if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)) {
            nexthop = &UIP_IP_BUF->destipaddr;
        } else {
            uip_ds6_route_t* locrt;
            locrt = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
            if(locrt == NULL) {
                if((nexthop = uip_ds6_defrt_choose()) == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
                    UIP_FALLBACK_INTERFACE.output();
#else
                    PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif
                    uip_len = 0;
                    return;
                }
            } else {
                nexthop = &locrt->nexthop;
            }
        }
        /* end of next hop determination */
        if((nbr = uip_ds6_nbr_lookup(nexthop)) == NULL) {
            //      printf("add1 %d\n", nexthop->u8[15]);
            if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE)) == NULL) {
                //        printf("add n\n");
                uip_len = 0;
                return;
            } else {
#if UIP_CONF_IPV6_QUEUE_PKT
                /* copy outgoing pkt in the queuing buffer for later transmmit */
                if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
                    memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
                    uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
                }
#endif
                /* RFC4861, 7.2.2:
                 * "If the source address of the packet prompting the solicitation is the
                 * same as one of the addresses assigned to the outgoing interface, that
                 * address SHOULD be placed in the IP Source Address of the outgoing
                 * solicitation.  Otherwise, any one of the addresses assigned to the
                 * interface should be used."*/
                if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)) {
                    uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
                } else {
                    uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
                }

                stimer_set(&(nbr->sendns), uip_ds6_if.retrans_timer / 1000);
                nbr->nscount = 1;
            }
        } else {
            if(nbr->state == NBR_INCOMPLETE) {
                PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
                /* copy outgoing pkt in the queuing buffer for later transmmit and set
                   the destination nbr to nbr */
                if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
                    memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
                    uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
                }
                /*        memcpy(nbr->queue_buf, UIP_IP_BUF, uip_len);
                          nbr->queue_buf_len = uip_len;*/
                uip_len = 0;
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
                return;
            }
            /* if running NUD (nbc->state == STALE, DELAY, or PROBE ) keep
               sending in parallel see rfc 4861 Node behavior in section 7.7.3*/

            if(nbr->state == NBR_STALE) {
                nbr->state = NBR_DELAY;
                stimer_set(&(nbr->reachable),
                           UIP_ND6_DELAY_FIRST_PROBE_TIME);
                nbr->nscount = 0;
                PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
            }

            stimer_set(&(nbr->sendns),
                       uip_ds6_if.retrans_timer / 1000);

            tcpip_output(&(nbr->lladdr));


#if UIP_CONF_IPV6_QUEUE_PKT
            /* Send the queued packets from here, may not be 100% perfect though.
             * This happens in a few cases, for example when instead of receiving a
             * NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
             *to STALE, and you must both send a NA and the queued packet
             */
            /*      if(nbr->queue_buf_len != 0) {
              uip_len = nbr->queue_buf_len;
              memcpy(UIP_IP_BUF, nbr->queue_buf, uip_len);
              nbr->queue_buf_len = 0;
              tcpip_output(&(nbr->lladdr));
              }*/
            if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
                uip_len = uip_packetqueue_buflen(&nbr->packethandle);
                memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
                uip_packetqueue_free(&nbr->packethandle);
                tcpip_output(&(nbr->lladdr));
            }
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/

            uip_len = 0;
            return;
        }
    }

    /*multicast IP destination address */
    tcpip_output(NULL);
    uip_len = 0;
    uip_ext_len = 0;

}
Exemplo n.º 20
0
void netMainThread(void* arg)
{
  uint8_t i;
#if !NETSTACK_CONF_WITH_IPV6
  POSTIMER_t arpTimer;
#endif
  POSTIMER_t periodicTimer;
  int sendRequested;
  bool packetSeen;

#if !NETSTACK_CONF_WITH_IPV6
  arpTimer = posTimerCreate();
  P_ASSERT("netMainThread1", arpTimer != NULL);

  posTimerSet(arpTimer, uipGiant, MS(10000), MS(10000));
  posTimerStart(arpTimer);
#endif

  periodicTimer = posTimerCreate();
  P_ASSERT("netMainThread2", periodicTimer != NULL);

  posTimerSet(periodicTimer, uipGiant, MS(500), MS(500));
  posTimerStart(periodicTimer);

  posMutexLock(uipMutex);

  packetSeen = false;

  while(1) {

    posMutexUnlock(uipMutex);

    // Using semaphore here is not fully optimal.
    // As it is a counting one, it can get bumped
    // to larger value than 1 by upper or interrupt 
    // layer. However, not much harm is done,
    // this loop just spins extra times without
    // doing nothing useful.

    // A Pico]OS Flag object would be perfect,
    // but it doesn't work with posTimer* functions.

    if (!packetSeen || pollTicks == INFINITE)
      posSemaWait(uipGiant, pollTicks);

    posMutexLock(uipMutex);

    sendRequested = dataToSend;
    dataToSend = 0;
    packetSeen = false;

    if (sendRequested) {

      for(i = 0; i < UIP_CONNS; i++) {

        uip_len = 0;
        uip_poll_conn(&uip_conns[i]);
        if(uip_len > 0) {

#if NETCFG_UIP_SPLIT == 1
          uip_split_output();
#else
#if NETSTACK_CONF_WITH_IPV6
          tcpip_ipv6_output();
#else
          tcpip_output();
#endif
#endif
        }
      }

#if UIP_UDP
      for(i = 0; i < UIP_UDP_CONNS; i++) {

        uip_len = 0;
        uip_udp_periodic(i);
        if(uip_len > 0) {

#if NETSTACK_CONF_WITH_IPV6
          tcpip_ipv6_output();
#else
          tcpip_output();
#endif
        }
      }
#endif /* UIP_UDP */

    }

    packetSeen = netInterfacePoll();

    if (posTimerFired(periodicTimer)) {

      for(i = 0; i < UIP_CONNS; i++) {

        uip_periodic(i);
        if(uip_len > 0) {

#if NETCFG_UIP_SPLIT == 1
          uip_split_output();
#else
#if NETSTACK_CONF_WITH_IPV6
          tcpip_ipv6_output();
#else
          tcpip_output();
#endif
#endif
        }
      }

#if UIP_UDP
      for(i = 0; i < UIP_UDP_CONNS; i++) {

        uip_udp_periodic(i);
        if(uip_len > 0) {

#if NETSTACK_CONF_WITH_IPV6
          tcpip_ipv6_output();
#else
          tcpip_output();
#endif
        }
      }
#endif /* UIP_UDP */

    }

#if NETSTACK_CONF_WITH_IPV6 == 0
    if (posTimerFired(arpTimer)) {

      uip_arp_timer();
    }
#endif

// Run contiki-style timers.
// Instead of posting events to process like
// contiki does, it just calls common callback function
// to do the work.

    etimer_request_poll();

  }
}
Exemplo n.º 21
0
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
#if FORWARDER
	rpl_instance_t *instance;
	uint8_t octet;
	uint8_t ip6id;
	int rssi_temp;
	uint8_t send_rssi;
	rimeaddr_t packet_from_addr;

	packet_from_addr = *packetbuf_addr(PACKETBUF_ADDR_SENDER);
	instance = &instance_table[0];
	octet = packet_from_addr.u8[7];
	ip6id = (octet & 0b00111111) << 2;
	tcp_rssi = packetbuf_attr(PACKETBUF_ATTR_RSSI);
  if(is_mobile_node(octet) == 1) {
    packet_input_count++;
    rssi_temp = tcp_rssi - 45;
    if(tcp_rssi > 200) {
      rssi_temp = tcp_rssi - 255 - 46;
    }
    rssi_sum += rssi_temp;

    if(packet_input_count == WINDOW_SIZE) {
      rssi_sum = rssi_sum / WINDOW_SIZE;
      PRINTF("RSSI = %d\n", rssi_sum);
      PRINTF("packet input count = %d\n", packet_input_count);
      if(rssi_sum <= -90) {
        send_rssi = rssi_sum + 255 + 46;
        dis_output(NULL, 1, 0, send_rssi, ip6id);
      }
      rssi_sum = 0;
      packet_input_count = 0;
    }
  }
#endif

#if UIP_CONF_IP_FORWARD
  if(uip_len > 0) {
    tcpip_is_forwarding = 1;
    if(uip_fw_forward() == UIP_FW_LOCAL) {
      tcpip_is_forwarding = 0;
      check_for_tcp_syn();
      uip_input();
      if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
        uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
        tcpip_ipv6_output();
#else
        PRINTF("tcpip packet_input forward output len %d\n", uip_len);
        tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
      }
    }
    tcpip_is_forwarding = 0;
  }
#else /* UIP_CONF_IP_FORWARD */
  if(uip_len > 0) {
    check_for_tcp_syn();
    uip_input();
    if(uip_len > 0) {
#if UIP_CONF_TCP_SPLIT
      uip_split_output();
#else /* UIP_CONF_TCP_SPLIT */
#if UIP_CONF_IPV6
      tcpip_ipv6_output();
#else
      PRINTF("tcpip packet_input output len %d\n", uip_len);
      tcpip_output();
#endif
#endif /* UIP_CONF_TCP_SPLIT */
    }
  }
#endif /* UIP_CONF_IP_FORWARD */
}
Exemplo n.º 22
0
/**
 * \brief   Take a packet received over the ethernet link, and send it
 * out over 802.15.4
 */
void mac_ethernetToLowpan(uint8_t * ethHeader)
{
  //Dest address
  uip_lladdr_t destAddr;
  uip_lladdr_t *destAddrPtr = NULL;

  PRINTF("Packet type: %x\n", ((struct uip_eth_hdr *) ethHeader)->type);

   //RUM doesn't support sending data
   #if UIP_CONF_USE_RUM
   return;
   #endif

  //If not IPv6 we don't do anything
  if (((struct uip_eth_hdr *) ethHeader)->type != UIP_HTONS(UIP_ETHTYPE_IPV6)) {
    PRINTF("eth2low: Packet is not IPv6, dropping\n");
/*     rndis_stat.txbad++; */
    uip_len = 0;
    return;
  }

  // In sniffer mode we don't ever send anything
  if (usbstick_mode.sendToRf == 0) {
    uip_len = 0;
    return;
  }

  /* IPv6 uses 33-33-xx-xx-xx-xx prefix for multicast ND stuff */
  if ( (((struct uip_eth_hdr *) ethHeader)->dest.addr[0] == 0x33) &&
       (((struct uip_eth_hdr *) ethHeader)->dest.addr[1] == 0x33) )
  {
    PRINTF("eth2low: Ethernet multicast packet received\n");
    ;//Do Nothing
  } else if ( (((struct uip_eth_hdr *) ethHeader)->dest.addr[0] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[1] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[2] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[3] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[4] == 0xFF) &&
            (((struct uip_eth_hdr *) ethHeader)->dest.addr[5] == 0xFF) ) {
    /* IPv6 does not use broadcast addresses, hence this should not happen */
    PRINTF("eth2low: Ethernet broadcast address received, should not happen?\n");
/*     rndis_stat.txbad++; */
    uip_len = 0;
    return;
  } else {
    PRINTF("eth2low: Addressed packet received... ");
    //Check this returns OK
    if (mac_createSicslowpanLongAddr( &(((struct uip_eth_hdr *) ethHeader)->dest.addr[0]), &destAddr) == 0) {
      PRINTF(" translation failed\n");
/*       rndis_stat.txbad++; */
      uip_len = 0;
      return;
    }
    PRINTF(" translated OK\n");
    destAddrPtr = &destAddr;
  }

  //Remove header from length before passing onward
  uip_len -= UIP_LLH_LEN;

  //Some IP packets have link layer in them, need to change them around!
  if (usbstick_mode.translate) {
     uint8_t transReturn =
      mac_translateIPLinkLayer(ll_802154_type);
    PRINTF("IPTranslation: returns %d\n", transReturn);
  }

  if (usbstick_mode.sendToRf){
    tcpip_output(destAddrPtr);
/* 	  rndis_stat.txok++; */
  }

  uip_len = 0;

}
Exemplo n.º 23
0
smcp_status_t
smcp_plat_outbound_finish(smcp_t self,const uint8_t* data_ptr, coap_size_t data_len, int flags)
{
	SMCP_EMBEDDED_SELF_HOOK;
	smcp_status_t ret = SMCP_STATUS_FAILURE;

	assert(uip_udp_conn == self->plat.udp_conn);

	uip_slen = data_len;

	require_action(uip_slen<SMCP_MAX_PACKET_LENGTH, bail, ret = SMCP_STATUS_MESSAGE_TOO_BIG);

	if (data_ptr != uip_sappdata) {
		memmove(
			uip_sappdata,
			data_ptr,
			uip_slen
		);
		data_ptr = (const uint8_t*)uip_sappdata;
	}

#if 0
	// TODO: For some reason this isn't working anymore. Investigate.
	if(self->is_responding) {
		// We are responding, let uIP handle preparing the packet.
	} else
#endif

	{	// Here we explicitly tickle UIP to send the packet.

		// Change the remote IP address temporarily.
		uip_ipaddr_copy(&uip_udp_conn->ripaddr, &self->plat.sockaddr_remote.smcp_addr);
		smcp_get_current_instance()->plat.udp_conn->rport = self->plat.sockaddr_remote.smcp_port;

		uip_process(UIP_UDP_SEND_CONN);

#if UIP_CONF_IPV6_MULTICAST
		/* Let the multicast engine process the datagram before we send it */
		if (uip_is_addr_mcast_routable(&uip_udp_conn->ripaddr)) {
			UIP_MCAST6.out();
		}
#endif /* UIP_IPV6_MULTICAST */

		// TODO: This next part is somewhat contiki-ish. Abstract somehow?
#if UIP_CONF_IPV6
		tcpip_ipv6_output();
#else
		tcpip_output();
#endif

		// Since we just sent out packet, we need to zero out uip_slen
		// to prevent uIP from trying to send out a packet.
		uip_slen = 0;

		// Make our remote address unspecified again, so that we can continue
		// to receive traffic.
		memset(&smcp_get_current_instance()->plat.udp_conn->ripaddr, 0, sizeof(uip_ipaddr_t));
		smcp_get_current_instance()->plat.udp_conn->rport = 0;
	}

	ret = SMCP_STATUS_OK;
bail:
	return ret;
}