static uint8_t
bridge_output(uip_lladdr_t * dest)
{
int isBroadcast = IS_BROADCAST_ADDR(dest);
int wsnDest = 0;
if(!isBroadcast) {
LOG6LBR_LLADDR_PRINTF(PACKET, PF_OUT, dest, "bridge_output: Sending packet to ");
} else {
LOG6LBR_PRINTF(PACKET, PF_OUT, "bridge_output: Sending packet to Broadcast\n");
}
if(isBroadcast) {
//Obviously we can not guess the target segment for a multicast packet
//So we have to check the packet source prefix (and match it on the Ethernet segment prefix)
//or, in case of link-local packet, check packet type and/or packet data
if((UIP_IP_BUF->proto == UIP_PROTO_ICMP6
&& UIP_ICMP_BUF->type == ICMP6_RA)
|| (UIP_IP_BUF->proto == UIP_PROTO_ICMP6
&& UIP_ICMP_BUF->type == ICMP6_NS
&& uip_ipaddr_prefixcmp(&wsn_net_prefix,
&UIP_ND6_NS_BUF->tgtipaddr, 64))
|| uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->srcipaddr, 64)) {
wsnDest = 1;
}
}
if(wsnDest || IS_EUI64_ADDR(dest)) {
wireless_output(NULL, dest);
} else {
eth_output(NULL, dest);
}
return 0;
}
static uint8_t
bridge_output(const uip_lladdr_t * dest)
{
int isBroadcast = IS_BROADCAST_ADDR(dest);
if(!isBroadcast) {
LOG6LBR_LLADDR_PRINTF(PACKET, PF_OUT, dest, "bridge_output: Sending packet to ");
} else {
LOG6LBR_PRINTF(PACKET, PF_OUT, "bridge_output: Sending packet to Broadcast\n");
}
//Filter WSN vs Ethernet segment traffic
if(IS_EUI48_ADDR(dest)) {
eth_output(NULL, dest);
} else if(IS_EUI64_ADDR(dest)) {
wireless_output(NULL, dest);
} else {
if (UIP_IP_BUF->proto != UIP_PROTO_ICMP6 || UIP_ICMP_BUF->type != ICMP6_NA) {
wireless_output(NULL, dest);
}
eth_output(NULL, dest);
}
return 0;
}
static uint8_t
bridge_output(uip_lladdr_t * dest)
{
int ethernetDest = 0;
if(uip_len == 0) {
LOG6LBR_ERROR("Trying to send empty packet\n");
return 0;
}
if(!IS_BROADCAST_ADDR(dest)) {
LOG6LBR_LLADDR_PRINTF(PACKET, PF_OUT, dest, "bridge_output: Sending packet to ");
} else {
LOG6LBR_PRINTF(PACKET, PF_OUT, "bridge_output: Sending packet to Broadcast\n");
}
if(IS_BROADCAST_ADDR(dest)) {
//Obviously we can not guess the target segment for a multicast packet
//So we have to check the packet source prefix (and match it on the Ethernet segment prefix)
//or, in case of link-local packet, check packet type and/or packet data
if((UIP_IP_BUF->proto == UIP_PROTO_ICMP6
&& UIP_ICMP_BUF->type == ICMP6_RA)
|| (UIP_IP_BUF->proto == UIP_PROTO_ICMP6
&& UIP_ICMP_BUF->type == ICMP6_NS
&& uip_ipaddr_prefixcmp(ð_net_prefix,
&UIP_ND6_NS_BUF->tgtipaddr, 64))
|| uip_ipaddr_prefixcmp(ð_net_prefix, &UIP_IP_BUF->srcipaddr, 64)) {
ethernetDest = 1;
}
}
if(ethernetDest || IS_EUI48_ADDR(dest)) {
eth_output(NULL, dest);
} else {
#if CETIC_6LBR_ONE_ITF
eth_output(&wsn_mac_addr, dest);
#else
wireless_output(NULL, dest);
#endif
}
return 0;
}
static uint8_t
bridge_output(const uip_lladdr_t * dest)
{
uint8_t isEthOutput = UIP_TRANSMITTED_INTERFACE_TYPE & UIP_ETH_INTERFACE_MASK;
uint8_t isWirelessOutput = UIP_TRANSMITTED_INTERFACE_TYPE & UIP_LN_INTERFACE_MASK;
//Filter WSN vs Ethernet segment traffic
if(isEthOutput) {
eth_output(NULL, dest);
}
if( isWirelessOutput) {
wireless_output(NULL, dest);
}
return 0;
}
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 uint8_t
bridge_output(const uip_lladdr_t * dest)
{
int ethernetDest = 0;
int wsnDest = 0;
if(uip_len == 0) {
LOG6LBR_ERROR("Trying to send empty packet\n");
return 0;
}
if(!IS_BROADCAST_ADDR(dest)) {
LOG6LBR_LLADDR_PRINTF(PACKET, PF_OUT, dest, "bridge_output: Sending packet to ");
} else {
LOG6LBR_PRINTF(PACKET, PF_OUT, "bridge_output: Sending packet to Broadcast\n");
}
if(uip_ipaddr_prefixcmp(ð_net_prefix, &UIP_IP_BUF->destipaddr, 64)) {
LOG6LBR_6ADDR_PRINTF(PACKET, PF_OUT, ð_net_prefix, "dest prefix eth : ");
LOG6LBR_6ADDR_PRINTF(PACKET, PF_OUT, &UIP_IP_BUF->destipaddr, "dest eth : ");
//Packet destinated to the Ethernet subnet
ethernetDest = 1;
} else if(uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64)) {
LOG6LBR_6ADDR_PRINTF(PACKET, PF_OUT, &wsn_net_prefix, "dest prefix wsn : ");
LOG6LBR_6ADDR_PRINTF(PACKET, PF_OUT, &UIP_IP_BUF->destipaddr, "dest prefix wsn : ");
//Packet destinated to the WSN subnet
wsnDest = 1;
} else if(IS_EUI64_ADDR(dest)) {
//Destination unknown but next-hop is in WSN subnet
wsnDest = 1;
} else if (IS_EUI48_ADDR(dest)) {
//Destination unknown but next-hop is in Ethernet subnet
ethernetDest = 1;
} else {
//Obviously we can not guess the target segment for a multicast packet
//So we have to check the packet source prefix (and match it on the Ethernet segment prefix)
//or, in case of link-local packet, check packet type and/or packet data
#if UIP_CONF_IPV6_RPL
//in RPL mode, RA and RS packets are used to configure the Ethernet subnet
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
(UIP_ICMP_BUF->type == ICMP6_RA || UIP_ICMP_BUF->type == ICMP6_RS)) {
ethernetDest = 1;
} else if (UIP_IP_BUF->proto == UIP_PROTO_ICMP6
&& UIP_ICMP_BUF->type == ICMP6_NS
&& uip_ipaddr_prefixcmp(ð_net_prefix,
&UIP_ND6_NS_BUF->tgtipaddr, 64)) {
ethernetDest = 1;
#else
//in NDP mode, RA and RS packets are used to configure the WSN subnet
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
(UIP_ICMP_BUF->type == ICMP6_RA || UIP_ICMP_BUF->type == ICMP6_RS)) {
wsnDest = 1;
} else if (UIP_IP_BUF->proto == UIP_PROTO_ICMP6
&& UIP_ICMP_BUF->type == ICMP6_NS
&& uip_ipaddr_prefixcmp(&wsn_net_prefix,
&UIP_ND6_NS_BUF->tgtipaddr, 64)) {
wsnDest = 1;
#endif
} else if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
UIP_ICMP_BUF->type == ICMP6_RPL) {
//RPL packets are always for WSN subnet
wsnDest = 1;
} else if(uip_ipaddr_prefixcmp(ð_net_prefix, &UIP_IP_BUF->srcipaddr, 64)) {
//Packet type unknown, but source is from Ethernet subnet
ethernetDest = 1;
} else if(uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->srcipaddr, 64)) {
//Packet type unknown, but source is from WSN subnet
wsnDest = 1;
} else {
// We could not guess the destination, forward to both
ethernetDest = 1;
wsnDest = 1;
}
}
if(wsnDest) {
#if CETIC_6LBR_ONE_ITF
eth_output(&wsn_mac_addr, dest);
#else
wireless_output(NULL, dest);
#endif
}
if(ethernetDest) {
eth_output(NULL, dest);
}
return 0;
}
#endif
/*---------------------------------------------------------------------------*/
void
packet_filter_init(void)
{
wireless_outputfunc = tcpip_get_outputfunc();
tcpip_set_outputfunc(bridge_output);
tcpip_inputfunc = tcpip_get_inputfunc();
tcpip_set_inputfunc(wireless_input);
}
