uint8_t
xtcpip_output(uip_lladdr_t *lladdr, chanend mac_tx)
{
/*
* If L3 dest is multicast, build L2 multicast address
* as per RFC 2464 section 7
* else fill with the addrsess in argument
*/
if(lladdr == NULL) {
/* the dest must be multicast */
(&BUF->dest)->addr[0] = 0x33;
(&BUF->dest)->addr[1] = 0x33;
(&BUF->dest)->addr[2] = UIP_TCP_BUF->destipaddr.u8[12];
(&BUF->dest)->addr[3] = UIP_TCP_BUF->destipaddr.u8[13];
(&BUF->dest)->addr[4] = UIP_TCP_BUF->destipaddr.u8[14];
(&BUF->dest)->addr[5] = UIP_TCP_BUF->destipaddr.u8[15];
} else {
memcpy(&BUF->dest, lladdr, UIP_LLADDR_LEN);
}
memcpy(&BUF->src, &uip_lladdr, UIP_LLADDR_LEN);
BUF->type = UIP_HTONS(UIP_ETHTYPE_IPV6);
uip_len += sizeof(struct uip_eth_hdr);
xcoredev_send(mac_tx);
return 0;
}
static void
uip_split_output_send(chanend mac_tx)
{
/* 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_len += UIP_LLH_LEN;
/* Transmit the first packet. */
xcoredev_send(mac_tx);
}
/*-----------------------------------------------------------------------------*/
void
uip_split_output(chanend mac_tx)
{
u16_t tcplen, len1, len2;
/* We only try to split maximum sized TCP segments. */
if(BUF->proto == UIP_PROTO_TCP &&
uip_len + UIP_TCPIP_HLEN > UIP_BUFSIZE/2) {
// printstr("split");
tcplen = uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN;
/* 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 */
uip_len += UIP_LLH_LEN;
/* Transmit the first packet. */
/* uip_fw_output();*/
/* tcpip_output(); */
xcoredev_send(mac_tx);
/* 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();*/
uip_len += UIP_LLH_LEN;
xcoredev_send(mac_tx);
} else {
