Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'

1 files changed, 84 insertions, 0 deletions

diff --git a/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c b/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c
new file mode 100644
index 000000000..03c19e00e
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/UDP.c
@@ -0,0 +1,84 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  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 disclaims 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;
+}
+