X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d423090b26ade8912e669d6c6d3c5463e0669429..77a9df36a77d2523dd2bc24fa17f9f04c6c175c5:/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c diff --git a/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c b/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c index ea679512b..bc714e417 100644 --- a/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c +++ b/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c @@ -1,81 +1,84 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, provided that the above copyright notice appear in all - copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * User Datagram Protocol (UDP) packet handling routines. This protocol handles high throughput, low - * reliability packets which are typically used to encapsulate streaming data. - */ - -#define INCLUDE_FROM_UDP_C -#include "UDP.h" - -/** Processes a UDP packet inside an Ethernet frame, and writes the appropriate response - * to the output Ethernet frame if a subprotocol handler has created a response packet. - * - * \param[in] IPHeaderInStart Pointer to the start of the incoming packet's IP header - * \param[in] UDPHeaderInStart Pointer to the start of the incoming packet's UDP header - * \param[out] UDPHeaderOutStart Pointer to the start of the outgoing packet's UDP header - * - * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise - */ -int16_t UDP_ProcessUDPPacket(void* IPHeaderInStart, void* UDPHeaderInStart, void* UDPHeaderOutStart) -{ - UDP_Header_t* UDPHeaderIN = (UDP_Header_t*)UDPHeaderInStart; - UDP_Header_t* UDPHeaderOUT = (UDP_Header_t*)UDPHeaderOutStart; - - int16_t RetSize = NO_RESPONSE; - - DecodeUDPHeader(UDPHeaderInStart); - - switch (SwapEndian_16(UDPHeaderIN->DestinationPort)) - { - case UDP_PORT_DHCP_REQUEST: - RetSize = DHCP_ProcessDHCPPacket(IPHeaderInStart, - &((uint8_t*)UDPHeaderInStart)[sizeof(UDP_Header_t)], - &((uint8_t*)UDPHeaderOutStart)[sizeof(UDP_Header_t)]); - break; - } - - /* Check to see if the protocol processing routine has filled out a response */ - if (RetSize > 0) - { - /* Fill out the response UDP packet header */ - UDPHeaderOUT->SourcePort = UDPHeaderIN->DestinationPort; - UDPHeaderOUT->DestinationPort = UDPHeaderIN->SourcePort; - UDPHeaderOUT->Checksum = 0; - UDPHeaderOUT->Length = SwapEndian_16(sizeof(UDP_Header_t) + RetSize); - - /* Return the size of the response so far */ - return (sizeof(UDP_Header_t) + RetSize); - } - - return NO_RESPONSE; -} +/* + LUFA Library + Copyright (C) Dean Camera, 2011. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * User Datagram Protocol (UDP) packet handling routines. This protocol handles high throughput, low + * reliability packets which are typically used to encapsulate streaming data. + */ + +#define INCLUDE_FROM_UDP_C +#include "UDP.h" + +/** Processes a UDP packet inside an Ethernet frame, and writes the appropriate response + * to the output Ethernet frame if a sub-protocol handler has created a response packet. + * + * \param[in] IPHeaderInStart Pointer to the start of the incoming packet's IP header + * \param[in] UDPHeaderInStart Pointer to the start of the incoming packet's UDP header + * \param[out] UDPHeaderOutStart Pointer to the start of the outgoing packet's UDP header + * + * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise + */ +int16_t UDP_ProcessUDPPacket(void* IPHeaderInStart, + void* UDPHeaderInStart, + void* UDPHeaderOutStart) +{ + UDP_Header_t* UDPHeaderIN = (UDP_Header_t*)UDPHeaderInStart; + UDP_Header_t* UDPHeaderOUT = (UDP_Header_t*)UDPHeaderOutStart; + + int16_t RetSize = NO_RESPONSE; + + DecodeUDPHeader(UDPHeaderInStart); + + switch (SwapEndian_16(UDPHeaderIN->DestinationPort)) + { + case UDP_PORT_DHCP_REQUEST: + RetSize = DHCP_ProcessDHCPPacket(IPHeaderInStart, + &((uint8_t*)UDPHeaderInStart)[sizeof(UDP_Header_t)], + &((uint8_t*)UDPHeaderOutStart)[sizeof(UDP_Header_t)]); + break; + } + + /* Check to see if the protocol processing routine has filled out a response */ + if (RetSize > 0) + { + /* Fill out the response UDP packet header */ + UDPHeaderOUT->SourcePort = UDPHeaderIN->DestinationPort; + UDPHeaderOUT->DestinationPort = UDPHeaderIN->SourcePort; + UDPHeaderOUT->Checksum = 0; + UDPHeaderOUT->Length = SwapEndian_16(sizeof(UDP_Header_t) + RetSize); + + /* Return the size of the response so far */ + return (sizeof(UDP_Header_t) + RetSize); + } + + return NO_RESPONSE; +} +