/** Main program entry point. This routine contains the overall program flow, including initial * setup of all components and the main program loop. */ int main(void) { SetupHardware(); TCP_Init(); Webserver_Init(); LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); sei(); for (;;) { if (RNDIS_Device_IsPacketReceived(&Ethernet_RNDIS_Interface)) { LEDs_SetAllLEDs(LEDMASK_USB_BUSY); RNDIS_Device_ReadPacket(&Ethernet_RNDIS_Interface, &FrameIN.FrameData, &FrameIN.FrameLength); Ethernet_ProcessPacket(&FrameIN, &FrameOUT); if (FrameOUT.FrameLength) { RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface, &FrameOUT.FrameData, FrameOUT.FrameLength); FrameOUT.FrameLength = 0; } LEDs_SetAllLEDs(LEDMASK_USB_READY); } TCP_TCPTask(&Ethernet_RNDIS_Interface, &FrameOUT); RNDIS_Device_USBTask(&Ethernet_RNDIS_Interface); USB_USBTask(); } }
/*-----------------------------------------------------------------------------*/ void uip_split_output(void) { #if UIP_TCP u16_t tcplen, len1, len2; /* We only try to split maximum sized TCP segments. */ if(BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE) { 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 + UIP_LLH_LEN; #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 - UIP_LLH_LEN) >> 8; BUF->len[1] = (uip_len - UIP_LLH_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 */ /* Transmit the first packet. */ #if UIP_CONF_IPV6 tcpip_ipv6_output(); #else if (USB_CurrentMode == USB_MODE_Device) RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len); else RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len); #endif /* UIP_CONF_IPV6 */ /* 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 determined by the length of the first packet (len1). */ uip_len = len2 + UIP_TCPIP_HLEN + UIP_LLH_LEN; #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 - UIP_LLH_LEN) >> 8; BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff; #endif /* UIP_CONF_IPV6 */ 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. */ #if UIP_CONF_IPV6 tcpip_ipv6_output(); #else if (USB_CurrentMode == USB_MODE_Device) RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len); else RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len); #endif /* UIP_CONF_IPV6 */ return; }