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Refuse to play ping-pong with host interface

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This commit is contained in:
dak664 2010-11-29 21:22:41 +00:00
parent 0735b431aa
commit 5a4fa388da
1 changed files with 17 additions and 0 deletions
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17
platform/avr-ravenusb/sicslow_ethernet.c
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@ -258,6 +258,11 @@
#endif
static const uint64_t simple_trans_ethernet_addr = 0x3E3D3C3B3AF2ULL;
#if UIP_CONF_IPV6_RPL
static uip_ipaddr_t last_sender;
#endif
extern uint64_t usb_ethernet_addr;
extern uint64_t macLongAddr;
@ -430,6 +435,8 @@ void mac_ethernetToLowpan(uint8_t * ethHeader)
#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();
#else
tcpip_output(destAddrPtr);
@ -487,6 +494,7 @@ void mac_LowpanToEthernet(void)
(uip_lladdr_t *)packetbuf_addr(PACKETBUF_ADDR_SENDER)
))
#endif
{
mac_createDefaultEthernetAddr((uint8_t *) &(ETHBUF(uip_buf)->src.addr[0]));
}
@ -496,6 +504,15 @@ void mac_LowpanToEthernet(void)
//Some IP packets have link layer in them, need to change them around!
mac_translateIPLinkLayer(ll_8023_type);
}
#if UIP_CONF_IPV6_RPL
/* We won't play ping-pong with the host! */
if(uip_ipaddr_cmp(&last_sender, &UIP_IP_BUF->srcipaddr)) {
PRINTF("siclow_ethernet: Destination off-link but no route\n");
uip_len=0;
return;
}
#endif
PRINTF("Low2Eth: Sending packet to ethernet\n\r");