static void
wireless_input(void)
{
int processFrame = 0;
int forwardFrame = 0;
LOG6LBR_PRINTF(PACKET, PF_IN, "wireless_input\n");
//Source filtering
//----------------
#if CETIC_6LBR_TRANSPARENTBRIDGE && CETIC_6LBR_LEARN_RPL_MAC
if (!rpl_mac_known) {
//Rpl Relay not yet configured, drop packet
uip_len = 0;
return;
}
if (rimeaddr_cmp
(packetbuf_addr(PACKETBUF_ADDR_SENDER),
& rimeaddr_node_addr) != 0) {
LOG6LBR_WARN("WSN packet received with RplRoot address, another TB is within range, dropping it\n");
//Drop packet
uip_len = 0;
return;
}
#endif
//Destination filtering
//---------------------
if(IS_BROADCAST_ADDR(packetbuf_addr(PACKETBUF_ADDR_RECEIVER))) { //Broadcast
LOG6LBR_PRINTF(PACKET, PF_IN, "wireless_input : broadcast\n");
forwardFrame = 1;
processFrame = 1;
} else { //unicast
LOG6LBR_LLADDR_PRINTF(PACKET, PF_IN, (uip_lladdr_t *) packetbuf_addr(PACKETBUF_ADDR_RECEIVER), "wireless_input: dest: ");
if(rimeaddr_cmp
(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
(rimeaddr_t *) & wsn_mac_addr) != 0) {
processFrame = 1; //For us
} else { //For another host
#if CETIC_6LBR_TRANSPARENTBRIDGE
//Not for us, forward it directly
forwardFrame = 1;
LOG6LBR_PRINTF(PACKET, PF_IN, "wireless_input : to forward\n");
#endif
}
}
//Packet forwarding
//-----------------
#if CETIC_6LBR_TRANSPARENTBRIDGE
if(forwardFrame) {
LOG6LBR_PRINTF(PACKET, PF_IN, "wireless_input: forwarding frame\n");
if(eth_output((uip_lladdr_t *) packetbuf_addr(PACKETBUF_ADDR_SENDER),
(uip_lladdr_t *) packetbuf_addr(PACKETBUF_ADDR_RECEIVER))) {
//Restore packet as eth_output might have converted its content
mac_translateIPLinkLayer(ll_802154_type);
}
}
#endif
//Handle packet
//-------------
if(processFrame) {
LOG6LBR_PRINTF(PACKET, PF_IN, "wireless_input: processing frame\n");
send_to_uip();
} else {
//Drop packet
uip_len = 0;
}
}
static void
wireless_input(void)
{
LOG6LBR_PRINTF(PACKET, PF_IN, "wireless_input: processing frame\n");
send_to_uip();
}
void
eth_input(void)
{
#if CETIC_6LBR_TRANSPARENTBRIDGE || CETIC_6LBR_ONE_ITF || CETIC_6LBR_6LR
uip_lladdr_t srcAddr;
#endif
uip_lladdr_t destAddr;
int processFrame = 0;
int forwardFrame = 0;
//Packet type filtering
//---------------------
//Keep only IPv6 traffic
if(BUF->type != UIP_HTONS(UIP_ETHTYPE_IPV6)) {
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: Dropping packet type=0x%04x\n", uip_ntohs(BUF->type));
uip_len = 0;
return;
}
//Packet source Filtering
//-----------------------
/* IPv6 uses 33-33-xx-xx-xx-xx prefix for multicast ND stuff */
if((BUF->dest.addr[0] == 0x33) && (BUF->dest.addr[1] == 0x33)) {
forwardFrame = 1;
processFrame = 1;
rimeaddr_copy((rimeaddr_t *) & destAddr, &rimeaddr_null);
} else if((BUF->dest.addr[0] == 0xFF)
&& (BUF->dest.addr[1] == 0xFF)
&& (BUF->dest.addr[2] == 0xFF)
&& (BUF->dest.addr[3] == 0xFF)
&& (BUF->dest.addr[4] == 0xFF)
&& (BUF->dest.addr[5] == 0xFF)) {
/* IPv6 does not use broadcast addresses, hence this should not happen */
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: Dropping broadcast packet\n");
uip_len = 0;
return;
} else {
/* Complex Address Translation */
if(mac_createSicslowpanLongAddr(&(BUF->dest.addr[0]), &destAddr) == 0) {
LOG6LBR_WARN("eth_input: Address translation failed\n");
uip_len = 0;
return;
}
}
//Packet content rewriting
//------------------------
//Some IP packets have link layer in them, need to change them around!
uint8_t transReturn = mac_translateIPLinkLayer(ll_802154_type);
if(transReturn != 0) {
LOG6LBR_WARN("eth_input: IPTranslation returns %d\n", transReturn);
}
//Destination filtering
//---------------------
if(memcmp((uint8_t *) & eth_mac_addr, BUF->dest.addr, 6) == 0) {
processFrame = 1;
} else {
#if CETIC_6LBR_TRANSPARENTBRIDGE
//Not for us, forward it directly
forwardFrame = 1;
#endif
}
//Handle packet
//-------------
#if CETIC_6LBR_TRANSPARENTBRIDGE
if(forwardFrame) {
mac_createSicslowpanLongAddr(&(BUF->src.addr[0]), &srcAddr);
#if CETIC_6LBR_LEARN_RPL_MAC
if (UIP_IP_BUF->proto == UIP_PROTO_ICMP6 && UIP_ICMP_BUF->type == ICMP6_RPL) {
uint8_t *buffer = UIP_ICMP_PAYLOAD;
uint16_t rank = (uint16_t)buffer[2] << 8 | buffer[2 + 1];
if ( rank == RPL_MIN_HOPRANKINC ) {
platform_set_wsn_mac((rimeaddr_t *) &srcAddr);
rpl_mac_known=1;
}
}
if (!rpl_mac_known) {
//Rpl Relay not yet configured, drop packet
uip_len = 0;
return;
}
if(rimeaddr_cmp((rimeaddr_t *) &srcAddr, &rimeaddr_node_addr) != 0) {
//Only forward RplRoot packets
LOG6LBR_LLADDR_PRINTF(PACKET, PF_IN, &destAddr, "eth_input: Forwarding frame to ");
wireless_output(NULL, &destAddr);
}
#else
LOG6LBR_LLADDR_PRINTF(PACKET, PF_IN, &destAddr, "eth_input: Forwarding frame to ");
wireless_output(&srcAddr, &destAddr);
#endif
}
#endif
if(processFrame) {
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: Processing frame\n");
#if CETIC_6LBR_ONE_ITF || CETIC_6LBR_6LR
//RPL uses source packet address to populate its neighbor table
//In this two modes RPL packets are incoming from Eth interface
mac_createSicslowpanLongAddr(&(BUF->src.addr[0]), &srcAddr);
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, (rimeaddr_t *) &srcAddr);
#endif
send_to_uip();
} else {
//Drop packet
uip_len = 0;
}
}
void
eth_input(void)
{
int processFrame = 0;
//Packet type filtering
//---------------------
//Keep only IPv6 traffic
if(BUF->type != UIP_HTONS(UIP_ETHTYPE_IPV6)) {
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: Dropping packet type=0x%04x\n", uip_ntohs(BUF->type));
uip_len = 0;
return;
}
if((UIP_IP_BUF->len[0] << 8) + UIP_IP_BUF->len[1] + 40 < uip_len) {
#if CONTIKI_TARGET_NATIVE
if(ethernet_has_fcs) {
uip_len = (UIP_IP_BUF->len[0] << 8) + UIP_IP_BUF->len[1] + 40;
} else
#endif
{
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: packet size different than reported in IPv6 header, %d vs %d\n", uip_len, (UIP_IP_BUF->len[0] << 8) + UIP_IP_BUF->len[1] + 40);
}
} else if((UIP_IP_BUF->len[0] << 8) + UIP_IP_BUF->len[1] + 40 > uip_len) {
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: packet shorter than reported in IPv6 header, %d vs %d\n", uip_len, (UIP_IP_BUF->len[0] << 8) + UIP_IP_BUF->len[1] + 40);
uip_len = 0;
return;
}
//Packet source Filtering
//-----------------------
/* IPv6 uses 33-33-xx-xx-xx-xx prefix for multicast ND stuff */
if((BUF->dest.addr[0] == 0x33) && (BUF->dest.addr[1] == 0x33)) {
processFrame = 1;
} else if((BUF->dest.addr[0] == 0xFF)
&& (BUF->dest.addr[1] == 0xFF)
&& (BUF->dest.addr[2] == 0xFF)
&& (BUF->dest.addr[3] == 0xFF)
&& (BUF->dest.addr[4] == 0xFF)
&& (BUF->dest.addr[5] == 0xFF)) {
/* IPv6 does not use broadcast addresses, hence this should not happen */
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: Dropping broadcast packet\n");
uip_len = 0;
return;
}
//Destination filtering
//---------------------
if(memcmp((uint8_t *) & eth_mac_addr, BUF->dest.addr, 6) == 0) {
processFrame = 1;
} else {
if(!processFrame) {
// Also search our neighbor list to see if we should accept it
if(uip_ds6_nbr_ll_lookup((const uip_lladdr_t*)BUF->dest.addr)) {
processFrame = 1;
}
}
}
//Handle packet
//-------------
if(processFrame) {
LOG6LBR_PRINTF(PACKET, PF_IN, "eth_input: Processing frame\n");
send_to_uip();
} else {
printf("eth_input: Dropping frame, not for us or any known node\n");
//Drop packet
uip_len = 0;
}
}
