diff options
Diffstat (limited to 'Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c')
| -rw-r--r-- | Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c b/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c index 41265aa27..118f5e0b5 100644 --- a/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c +++ b/Demos/Device/LowLevel/RNDISEthernet/Lib/DHCP.c @@ -1,7 +1,7 @@ /* LUFA Library Copyright (C) Dean Camera, 2010. - + dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ @@ -9,13 +9,13 @@ /* Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - Permission to use, copy, modify, distribute, and sell this + 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 + 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 + 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 @@ -34,7 +34,7 @@ * 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 @@ -53,7 +53,7 @@ int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart, 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)); @@ -73,7 +73,7 @@ int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart, 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; @@ -81,7 +81,7 @@ int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart, /* 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) { @@ -107,14 +107,15 @@ int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart, 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; } + |