diff options
Diffstat (limited to 'lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c')
| -rw-r--r-- | lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c b/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c deleted file mode 100644 index 6f7b40af69..0000000000 --- a/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - 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 - * - * 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 is 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; - memmove(&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++) = sizeof(IP_Address_t); - *(DHCPOptionsOUTStart++) = 0xFF; - *(DHCPOptionsOUTStart++) = 0xFF; - *(DHCPOptionsOUTStart++) = 0xFF; - *(DHCPOptionsOUTStart++) = 0x00; - - *(DHCPOptionsOUTStart++) = DHCP_OPTION_LEASETIME; - *(DHCPOptionsOUTStart++) = sizeof(uint32_t); - /* Lease Time 86400s (ONE_DAY) */ - *(DHCPOptionsOUTStart++) = 0x00; - *(DHCPOptionsOUTStart++) = 0x01; - *(DHCPOptionsOUTStart++) = 0x51; - *(DHCPOptionsOUTStart++) = 0x80; - - *(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) + 18 + 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; -} - |