diff options
author | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
---|---|---|
committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
commit | 071e02c6b6b4837fa9cf0b6d4c749994e02638d7 (patch) | |
tree | 960446788703b69f0bb285450be80c5b3d8cc22c /Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c | |
parent | e331b531c6e6d93eb0eee42b9002074e8090ad18 (diff) | |
download | lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.gz lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.bz2 lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.zip |
Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.
Diffstat (limited to 'Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c')
-rw-r--r-- | Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c | 236 |
1 files changed, 118 insertions, 118 deletions
diff --git a/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c b/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c index fd255e248..d3bffe996 100644 --- a/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c +++ b/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c @@ -1,118 +1,118 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 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
- *
- * Dynamic Host Configuration Protocol (DHCP) packet handling routines. This protocol
- * handles the automatic IP negotiation to the host, so that the host will use the provided
- * IP address given to it by the device.
- */
-
-#include "DHCP.h"
-
-/** Processes a DHCP packet inside an Ethernet frame, and writes the appropriate response
- * to the output Ethernet frame if the host is requesting or accepting an IP address.
- *
- * \param[in] IPHeaderInStart Pointer to the start of the incoming packet's IP header
- * \param[in] DHCPHeaderInStart Pointer to the start of the incoming packet's DHCP header
- * \param[out] DHCPHeaderOutStart Pointer to the start of the outgoing packet's DHCP header
- *
- * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise
- */
-int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart, void* DHCPHeaderInStart, void* DHCPHeaderOutStart)
-{
- IP_Header_t* IPHeaderIN = (IP_Header_t*)IPHeaderInStart;
- DHCP_Header_t* DHCPHeaderIN = (DHCP_Header_t*)DHCPHeaderInStart;
- DHCP_Header_t* DHCPHeaderOUT = (DHCP_Header_t*)DHCPHeaderOutStart;
-
- uint8_t* DHCPOptionsINStart = (uint8_t*)(DHCPHeaderInStart + sizeof(DHCP_Header_t));
- uint8_t* DHCPOptionsOUTStart = (uint8_t*)(DHCPHeaderOutStart + sizeof(DHCP_Header_t));
-
- DecodeDHCPHeader(DHCPHeaderInStart);
-
- /* Zero out the response DHCP packet, as much of it legacy and left at 0 */
- memset(DHCPHeaderOUT, 0, sizeof(DHCP_Header_t));
-
- /* Fill out the response DHCP packet */
- DHCPHeaderOUT->HardwareType = DHCPHeaderIN->HardwareType;
- DHCPHeaderOUT->Operation = DHCP_OP_BOOTREPLY;
- DHCPHeaderOUT->HardwareAddressLength = DHCPHeaderIN->HardwareAddressLength;
- DHCPHeaderOUT->Hops = 0;
- DHCPHeaderOUT->TransactionID = DHCPHeaderIN->TransactionID;
- DHCPHeaderOUT->ElapsedSeconds = 0;
- DHCPHeaderOUT->Flags = DHCPHeaderIN->Flags;
- DHCPHeaderOUT->YourIP = ClientIPAddress;
- memcpy(&DHCPHeaderOUT->ClientHardwareAddress, &DHCPHeaderIN->ClientHardwareAddress, sizeof(MAC_Address_t));
- DHCPHeaderOUT->Cookie = SwapEndian_32(DHCP_MAGIC_COOKIE);
-
- /* Alter the incoming IP packet header so that the corrected IP source and destinations are used - this means that
- when the response IP header is generated, it will use the corrected addresses and not the null/broatcast addresses */
- IPHeaderIN->SourceAddress = ClientIPAddress;
- IPHeaderIN->DestinationAddress = ServerIPAddress;
-
- /* Process the incoming DHCP packet options */
- while (DHCPOptionsINStart[0] != DHCP_OPTION_END)
- {
- /* Find the Message Type DHCP option, to determine the type of DHCP packet */
- if (DHCPOptionsINStart[0] == DHCP_OPTION_MESSAGETYPE)
- {
- if ((DHCPOptionsINStart[2] == DHCP_MESSAGETYPE_DISCOVER) || (DHCPOptionsINStart[2] == DHCP_MESSAGETYPE_REQUEST))
- {
- /* Fill out the response DHCP packet options for a DHCP OFFER or ACK response */
-
- *(DHCPOptionsOUTStart++) = DHCP_OPTION_MESSAGETYPE;
- *(DHCPOptionsOUTStart++) = 1;
- *(DHCPOptionsOUTStart++) = (DHCPOptionsINStart[2] == DHCP_MESSAGETYPE_DISCOVER) ? DHCP_MESSAGETYPE_OFFER
- : DHCP_MESSAGETYPE_ACK;
-
- *(DHCPOptionsOUTStart++) = DHCP_OPTION_SUBNETMASK;
- *(DHCPOptionsOUTStart++) = 4;
- *(DHCPOptionsOUTStart++) = 0xFF;
- *(DHCPOptionsOUTStart++) = 0xFF;
- *(DHCPOptionsOUTStart++) = 0xFF;
- *(DHCPOptionsOUTStart++) = 0x00;
-
- *(DHCPOptionsOUTStart++) = DHCP_OPTION_DHCPSERVER;
- *(DHCPOptionsOUTStart++) = sizeof(IP_Address_t);
- memcpy(DHCPOptionsOUTStart, &ServerIPAddress, sizeof(IP_Address_t));
- DHCPOptionsOUTStart += sizeof(IP_Address_t);
-
- *(DHCPOptionsOUTStart++) = DHCP_OPTION_END;
-
- return (sizeof(DHCP_Header_t) + 12 + sizeof(IP_Address_t));
- }
- }
-
- /* Go to the next DHCP option - skip one byte if option is a padding byte, else skip the complete option's size */
- DHCPOptionsINStart += ((DHCPOptionsINStart[0] == DHCP_OPTION_PAD) ? 1 : (DHCPOptionsINStart[1] + 2));
- }
-
- return NO_RESPONSE;
-}
+/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 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 + * + * Dynamic Host Configuration Protocol (DHCP) packet handling routines. This protocol + * handles the automatic IP negotiation to the host, so that the host will use the provided + * IP address given to it by the device. + */ + +#include "DHCP.h" + +/** Processes a DHCP packet inside an Ethernet frame, and writes the appropriate response + * to the output Ethernet frame if the host is requesting or accepting an IP address. + * + * \param[in] IPHeaderInStart Pointer to the start of the incoming packet's IP header + * \param[in] DHCPHeaderInStart Pointer to the start of the incoming packet's DHCP header + * \param[out] DHCPHeaderOutStart Pointer to the start of the outgoing packet's DHCP header + * + * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise + */ +int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart, void* DHCPHeaderInStart, void* DHCPHeaderOutStart) +{ + IP_Header_t* IPHeaderIN = (IP_Header_t*)IPHeaderInStart; + DHCP_Header_t* DHCPHeaderIN = (DHCP_Header_t*)DHCPHeaderInStart; + DHCP_Header_t* DHCPHeaderOUT = (DHCP_Header_t*)DHCPHeaderOutStart; + + uint8_t* DHCPOptionsINStart = (uint8_t*)(DHCPHeaderInStart + sizeof(DHCP_Header_t)); + uint8_t* DHCPOptionsOUTStart = (uint8_t*)(DHCPHeaderOutStart + sizeof(DHCP_Header_t)); + + DecodeDHCPHeader(DHCPHeaderInStart); + + /* Zero out the response DHCP packet, as much of it legacy and left at 0 */ + memset(DHCPHeaderOUT, 0, sizeof(DHCP_Header_t)); + + /* Fill out the response DHCP packet */ + DHCPHeaderOUT->HardwareType = DHCPHeaderIN->HardwareType; + DHCPHeaderOUT->Operation = DHCP_OP_BOOTREPLY; + DHCPHeaderOUT->HardwareAddressLength = DHCPHeaderIN->HardwareAddressLength; + DHCPHeaderOUT->Hops = 0; + DHCPHeaderOUT->TransactionID = DHCPHeaderIN->TransactionID; + DHCPHeaderOUT->ElapsedSeconds = 0; + DHCPHeaderOUT->Flags = DHCPHeaderIN->Flags; + DHCPHeaderOUT->YourIP = ClientIPAddress; + memcpy(&DHCPHeaderOUT->ClientHardwareAddress, &DHCPHeaderIN->ClientHardwareAddress, sizeof(MAC_Address_t)); + DHCPHeaderOUT->Cookie = SwapEndian_32(DHCP_MAGIC_COOKIE); + + /* Alter the incoming IP packet header so that the corrected IP source and destinations are used - this means that + when the response IP header is generated, it will use the corrected addresses and not the null/broatcast addresses */ + IPHeaderIN->SourceAddress = ClientIPAddress; + IPHeaderIN->DestinationAddress = ServerIPAddress; + + /* Process the incoming DHCP packet options */ + while (DHCPOptionsINStart[0] != DHCP_OPTION_END) + { + /* Find the Message Type DHCP option, to determine the type of DHCP packet */ + if (DHCPOptionsINStart[0] == DHCP_OPTION_MESSAGETYPE) + { + if ((DHCPOptionsINStart[2] == DHCP_MESSAGETYPE_DISCOVER) || (DHCPOptionsINStart[2] == DHCP_MESSAGETYPE_REQUEST)) + { + /* Fill out the response DHCP packet options for a DHCP OFFER or ACK response */ + + *(DHCPOptionsOUTStart++) = DHCP_OPTION_MESSAGETYPE; + *(DHCPOptionsOUTStart++) = 1; + *(DHCPOptionsOUTStart++) = (DHCPOptionsINStart[2] == DHCP_MESSAGETYPE_DISCOVER) ? DHCP_MESSAGETYPE_OFFER + : DHCP_MESSAGETYPE_ACK; + + *(DHCPOptionsOUTStart++) = DHCP_OPTION_SUBNETMASK; + *(DHCPOptionsOUTStart++) = 4; + *(DHCPOptionsOUTStart++) = 0xFF; + *(DHCPOptionsOUTStart++) = 0xFF; + *(DHCPOptionsOUTStart++) = 0xFF; + *(DHCPOptionsOUTStart++) = 0x00; + + *(DHCPOptionsOUTStart++) = DHCP_OPTION_DHCPSERVER; + *(DHCPOptionsOUTStart++) = sizeof(IP_Address_t); + memcpy(DHCPOptionsOUTStart, &ServerIPAddress, sizeof(IP_Address_t)); + DHCPOptionsOUTStart += sizeof(IP_Address_t); + + *(DHCPOptionsOUTStart++) = DHCP_OPTION_END; + + return (sizeof(DHCP_Header_t) + 12 + sizeof(IP_Address_t)); + } + } + + /* Go to the next DHCP option - skip one byte if option is a padding byte, else skip the complete option's size */ + DHCPOptionsINStart += ((DHCPOptionsINStart[0] == DHCP_OPTION_PAD) ? 1 : (DHCPOptionsINStart[1] + 2)); + } + + return NO_RESPONSE; +} |