static int
eth_output(const uip_lladdr_t * src, const uip_lladdr_t * dest)
{
if(IS_BROADCAST_ADDR(dest)) {
LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: broadcast\n");
} else {
LOG6LBR_LLADDR_PRINTF(PACKET, PF_OUT, dest, "eth_output: ");
}
//Packet filtering
//----------------
if(uip_len == 0) {
LOG6LBR_ERROR("eth_output: uip_len = 0\n");
return 0;
}
if(dest && linkaddr_cmp((linkaddr_t *) & dest,
(linkaddr_t *) & eth_mac64_addr)) {
LOG6LBR_ERROR("ethernet_output: sending to self\n");
return 0;
}
#if CETIC_6LBR_ETH_FILTER_RPL
//Filter out RPL (broadcast) traffic
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
UIP_ICMP_BUF->type == ICMP6_RPL) {
//LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Filtering out RPL traffic\n");
return 0;
}
#endif
//IP packet alteration
//--------------------
#if CETIC_6LBR_ROUTER
//Modify source address
if((nvm_data.mode & CETIC_MODE_REWRITE_ADDR_MASK) != 0
&& uip_is_addr_link_local(&UIP_IP_BUF->srcipaddr)
&& uip_ipaddr_cmp(&UIP_IP_BUF->srcipaddr, &wsn_ip_local_addr)) {
LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Update src address\n");
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, ð_ip_local_addr);
if(UIP_IP_BUF->proto == UIP_PROTO_UDP) {
#if UIP_UDP_CHECKSUMS
/* Calculate UDP checksum. */
UIP_UDP_BUF->udpchksum = 0;
UIP_UDP_BUF->udpchksum = ~(uip_udpchksum());
if(UIP_UDP_BUF->udpchksum == 0) {
UIP_UDP_BUF->udpchksum = 0xffff;
}
#endif /* UIP_UDP_CHECKSUMS */
} else if(UIP_IP_BUF->proto == UIP_PROTO_TCP) {
/* Calculate TCP checksum. */
UIP_TCP_BUF->tcpchksum = 0;
UIP_TCP_BUF->tcpchksum = ~(uip_tcpchksum());
} else if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6) {
/* Calculate ICMP checksum. */
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
}
}
#endif
#if CETIC_6LBR_SMARTBRIDGE
//Reset Hop Limit when in smart-bridge for NDP packets
//TODO: Is this still needed after #4467 ?
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
(UIP_ICMP_BUF->type == ICMP6_NS || UIP_ICMP_BUF->type == ICMP6_NA
|| UIP_ICMP_BUF->type == ICMP6_RS || UIP_ICMP_BUF->type == ICMP6_RA)) {
UIP_IP_BUF->ttl = 255;
}
#endif
#if CETIC_6LBR_SMARTBRIDGE || CETIC_6LBR_TRANSPARENTBRIDGE
//Remove ROUTER flag when in bridge mode
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 && UIP_ICMP_BUF->type == ICMP6_NA) {
//LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Updating NA\n");
UIP_ND6_NA_BUF->flagsreserved &= ~UIP_ND6_NA_FLAG_ROUTER;
}
#endif
//Some IP packets have link layer in them, need to change them around!
mac_translateIPLinkLayer(ll_8023_type);
//IP header alteration
//--------------------
#if UIP_CONF_IPV6_RPL
rpl_remove_header();
#endif
//Create packet header
//--------------------
//Packet type
BUF->type = uip_htons(UIP_ETHTYPE_IPV6);
//Destination address
if(IS_BROADCAST_ADDR(dest)) {
BUF->dest.addr[0] = 0x33;
BUF->dest.addr[1] = 0x33;
BUF->dest.addr[2] = UIP_IP_BUF->destipaddr.u8[12];
BUF->dest.addr[3] = UIP_IP_BUF->destipaddr.u8[13];
BUF->dest.addr[4] = UIP_IP_BUF->destipaddr.u8[14];
BUF->dest.addr[5] = UIP_IP_BUF->destipaddr.u8[15];
} else {
mac_createEthernetAddr(BUF->dest.addr, dest);
}
//Source address
if ( src != NULL ) {
mac_createEthernetAddr(BUF->src.addr, src);
} else {
memcpy(BUF->src.addr, eth_mac_addr, 6);
}
//Sending packet
//--------------
LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Sending packet to Ethernet\n");
eth_drv_send(uip_buf, uip_len + UIP_LLH_LEN);
return 1;
}
void uip_udpsend(struct uip_driver_s *dev, struct uip_udp_conn *conn)
{
struct uip_udpip_hdr *pudpbuf = UDPBUF;
if (dev->d_sndlen > 0)
{
/* The total lenth to send is the size of the application data plus
* the IP and UDP headers (and, eventually, the ethernet header)
*/
dev->d_len = dev->d_sndlen + UIP_IPUDPH_LEN;
/* Initialize the IP header. Note that for IPv6, the IP length field
* does not include the IPv6 IP header length.
*/
#ifdef CONFIG_NET_IPv6
pudpbuf->vtc = 0x60;
pudpbuf->tcf = 0x00;
pudpbuf->flow = 0x00;
pudpbuf->len[0] = (dev->d_sndlen >> 8);
pudpbuf->len[1] = (dev->d_sndlen & 0xff);
pudpbuf->nexthdr = UIP_PROTO_UDP;
pudpbuf->hoplimit = conn->ttl;
uip_ipaddr_copy(pudpbuf->srcipaddr, &dev->d_ipaddr);
uip_ipaddr_copy(pudpbuf->destipaddr, &conn->ripaddr);
#else /* CONFIG_NET_IPv6 */
pudpbuf->vhl = 0x45;
pudpbuf->tos = 0;
pudpbuf->len[0] = (dev->d_len >> 8);
pudpbuf->len[1] = (dev->d_len & 0xff);
++g_ipid;
pudpbuf->ipid[0] = g_ipid >> 8;
pudpbuf->ipid[1] = g_ipid & 0xff;
pudpbuf->ipoffset[0] = 0;
pudpbuf->ipoffset[1] = 0;
pudpbuf->ttl = conn->ttl;
pudpbuf->proto = UIP_PROTO_UDP;
uiphdr_ipaddr_copy(pudpbuf->srcipaddr, &dev->d_ipaddr);
uiphdr_ipaddr_copy(pudpbuf->destipaddr, &conn->ripaddr);
/* Calculate IP checksum. */
pudpbuf->ipchksum = 0;
pudpbuf->ipchksum = ~(uip_ipchksum(dev));
#endif /* CONFIG_NET_IPv6 */
/* Initialize the UDP header */
pudpbuf->srcport = conn->lport;
pudpbuf->destport = conn->rport;
pudpbuf->udplen = HTONS(dev->d_sndlen + UIP_UDPH_LEN);
#ifdef CONFIG_NET_UDP_CHECKSUMS
/* Calculate UDP checksum. */
pudpbuf->udpchksum = 0;
pudpbuf->udpchksum = ~(uip_udpchksum(dev));
if (pudpbuf->udpchksum == 0)
{
pudpbuf->udpchksum = 0xffff;
}
#else
pudpbuf->udpchksum = 0;
#endif
nllvdbg("Outgoing UDP packet length: %d (%d)\n",
dev->d_len, (pudpbuf->len[0] << 8) | pudpbuf->len[1]);
#ifdef CONFIG_NET_STATISTICS
uip_stat.udp.sent++;
uip_stat.ip.sent++;
#endif
}
