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Diffstat (limited to 'Projects/Webserver/Lib/DHCPClientApp.c')
| -rw-r--r-- | Projects/Webserver/Lib/DHCPClientApp.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/Projects/Webserver/Lib/DHCPClientApp.c b/Projects/Webserver/Lib/DHCPClientApp.c deleted file mode 100644 index 760718127e..0000000000 --- a/Projects/Webserver/Lib/DHCPClientApp.c +++ /dev/null @@ -1,208 +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 - * - * DHCP Client Application. When connected to the uIP stack, this will retrieve IP configuration settings from the - * DHCP server on the network. - */ - -#define INCLUDE_FROM_DHCPCLIENTAPP_C -#include "DHCPClientApp.h" - -#if defined(ENABLE_DHCP_CLIENT) || defined(__DOXYGEN__) - -/** Initialization function for the DHCP client. */ -void DHCPClientApp_Init(void) -{ - /* Create a new UDP connection to the DHCP server port for the DHCP solicitation */ - struct uip_udp_conn* Connection = uip_udp_new(&uip_broadcast_addr, HTONS(DHCP_SERVER_PORT)); - - /* If the connection was successfully created, bind it to the local DHCP client port */ - if (Connection != NULL) - { - uip_udp_appstate_t* const AppState = &Connection->appstate; - uip_udp_bind(Connection, HTONS(DHCP_CLIENT_PORT)); - - /* Set the initial client state */ - AppState->DHCPClient.CurrentState = DHCP_STATE_SendDiscover; - - /* Set timeout period to half a second for a DHCP server to respond */ - timer_set(&AppState->DHCPClient.Timeout, CLOCK_SECOND / 2); - } -} - -/** uIP stack application callback for the DHCP client. This function must be called each time the TCP/IP stack - * needs a UDP packet to be processed. - */ -void DHCPClientApp_Callback(void) -{ - uip_udp_appstate_t* const AppState = &uip_udp_conn->appstate; - DHCP_Header_t* const AppData = (DHCP_Header_t*)uip_appdata; - uint16_t AppDataSize = 0; - - switch (AppState->DHCPClient.CurrentState) - { - case DHCP_STATE_SendDiscover: - /* Clear all DHCP settings, reset client IP address */ - memset(&AppState->DHCPClient.DHCPOffer_Data, 0x00, sizeof(AppState->DHCPClient.DHCPOffer_Data)); - uip_sethostaddr((uip_ipaddr_t*)&AppState->DHCPClient.DHCPOffer_Data.AllocatedIP); - - /* Fill out the DHCP response header */ - AppDataSize += DHCPClientApp_FillDHCPHeader(AppData, DHCP_DISCOVER, AppState); - - /* Add the required DHCP options list to the packet */ - uint8_t RequiredOptionList[] = {DHCP_OPTION_SUBNET_MASK, DHCP_OPTION_ROUTER, DHCP_OPTION_DNS_SERVER}; - AppDataSize += DHCPCommon_SetOption(AppData->Options, DHCP_OPTION_REQ_LIST, sizeof(RequiredOptionList), - RequiredOptionList); - - /* Send the DHCP DISCOVER packet */ - uip_udp_send(AppDataSize); - - /* Reset the timeout timer, progress to next state */ - timer_reset(&AppState->DHCPClient.Timeout); - AppState->DHCPClient.CurrentState = DHCP_STATE_WaitForOffer; - - break; - case DHCP_STATE_WaitForOffer: - if (!(uip_newdata())) - { - /* Check if the DHCP timeout period has expired while waiting for a response */ - if (timer_expired(&AppState->DHCPClient.Timeout)) - AppState->DHCPClient.CurrentState = DHCP_STATE_SendDiscover; - - break; - } - - uint8_t OfferResponse_MessageType; - if ((AppData->TransactionID == DHCP_TRANSACTION_ID) && - DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_MSG_TYPE, &OfferResponse_MessageType) && - (OfferResponse_MessageType == DHCP_OFFER)) - { - /* Received a DHCP offer for an IP address, copy over values for later request */ - memcpy(&AppState->DHCPClient.DHCPOffer_Data.AllocatedIP, &AppData->YourIP, sizeof(uip_ipaddr_t)); - DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_SUBNET_MASK, &AppState->DHCPClient.DHCPOffer_Data.Netmask); - DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_ROUTER, &AppState->DHCPClient.DHCPOffer_Data.GatewayIP); - DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_SERVER_ID, &AppState->DHCPClient.DHCPOffer_Data.ServerIP); - - timer_reset(&AppState->DHCPClient.Timeout); - AppState->DHCPClient.CurrentState = DHCP_STATE_SendRequest; - } - - break; - case DHCP_STATE_SendRequest: - /* Fill out the DHCP response header */ - AppDataSize += DHCPClientApp_FillDHCPHeader(AppData, DHCP_REQUEST, AppState); - - /* Add the DHCP REQUESTED IP ADDRESS option to the packet */ - AppDataSize += DHCPCommon_SetOption(AppData->Options, DHCP_OPTION_REQ_IPADDR, sizeof(uip_ipaddr_t), - &AppState->DHCPClient.DHCPOffer_Data.AllocatedIP); - - /* Add the DHCP SERVER IP ADDRESS option to the packet */ - AppDataSize += DHCPCommon_SetOption(AppData->Options, DHCP_OPTION_SERVER_ID, sizeof(uip_ipaddr_t), - &AppState->DHCPClient.DHCPOffer_Data.ServerIP); - - /* Send the DHCP REQUEST packet */ - uip_udp_send(AppDataSize); - - /* Reset the timeout timer, progress to next state */ - timer_reset(&AppState->DHCPClient.Timeout); - AppState->DHCPClient.CurrentState = DHCP_STATE_WaitForACK; - - break; - case DHCP_STATE_WaitForACK: - if (!(uip_newdata())) - { - /* Check if the DHCP timeout period has expired while waiting for a response */ - if (timer_expired(&AppState->DHCPClient.Timeout)) - AppState->DHCPClient.CurrentState = DHCP_STATE_SendDiscover; - - break; - } - - uint8_t RequestResponse_MessageType; - if ((AppData->TransactionID == DHCP_TRANSACTION_ID) && - DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_MSG_TYPE, &RequestResponse_MessageType) && - (RequestResponse_MessageType == DHCP_ACK)) - { - /* Set the new network parameters from the DHCP server */ - uip_sethostaddr((uip_ipaddr_t*)&AppState->DHCPClient.DHCPOffer_Data.AllocatedIP); - uip_setnetmask((uip_ipaddr_t*)&AppState->DHCPClient.DHCPOffer_Data.Netmask); - uip_setdraddr((uip_ipaddr_t*)&AppState->DHCPClient.DHCPOffer_Data.GatewayIP); - - AppState->DHCPClient.CurrentState = DHCP_STATE_AddressLeased; - } - - break; - } -} - -/** Fills the DHCP packet response with the appropriate BOOTP header for DHCP. This fills out all the required - * fields, leaving only the additional DHCP options to be added to the packet before it is sent to the DHCP server. - * - * \param[out] DHCPHeader Location in the packet buffer where the BOOTP header should be written to - * \param[in] DHCPMessageType DHCP Message type, such as DHCP_DISCOVER - * \param[in] AppState Application state of the current UDP connection - * - * \return Size in bytes of the created DHCP packet - */ -static uint16_t DHCPClientApp_FillDHCPHeader(DHCP_Header_t* const DHCPHeader, - const uint8_t DHCPMessageType, - uip_udp_appstate_t* const AppState) -{ - /* Erase existing packet data so that we start will all 0x00 DHCP header data */ - memset(DHCPHeader, 0, sizeof(DHCP_Header_t)); - - /* Fill out the DHCP packet header */ - DHCPHeader->Operation = DHCP_OP_BOOTREQUEST; - DHCPHeader->HardwareType = DHCP_HTYPE_ETHERNET; - DHCPHeader->HardwareAddressLength = sizeof(MACAddress); - DHCPHeader->Hops = 0; - DHCPHeader->TransactionID = DHCP_TRANSACTION_ID; - DHCPHeader->ElapsedSeconds = 0; - DHCPHeader->Flags = HTONS(BOOTP_BROADCAST); - memcpy(&DHCPHeader->ClientIP, &uip_hostaddr, sizeof(uip_ipaddr_t)); - memcpy(&DHCPHeader->YourIP, &AppState->DHCPClient.DHCPOffer_Data.AllocatedIP, sizeof(uip_ipaddr_t)); - memcpy(&DHCPHeader->NextServerIP, &AppState->DHCPClient.DHCPOffer_Data.ServerIP, sizeof(uip_ipaddr_t)); - memcpy(&DHCPHeader->ClientHardwareAddress, &MACAddress, sizeof(struct uip_eth_addr)); - DHCPHeader->Cookie = DHCP_MAGIC_COOKIE; - - /* Add a DHCP message type and terminator options to the start of the DHCP options field */ - DHCPHeader->Options[0] = DHCP_OPTION_MSG_TYPE; - DHCPHeader->Options[1] = 1; - DHCPHeader->Options[2] = DHCPMessageType; - DHCPHeader->Options[3] = DHCP_OPTION_END; - - /* Calculate the total number of bytes added to the outgoing packet */ - return (sizeof(DHCP_Header_t) + 4); -} - -#endif - |