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diff --git a/lib/lufa/Projects/Webserver/Lib/DHCPClientApp.c b/lib/lufa/Projects/Webserver/Lib/DHCPClientApp.c
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+/*
+ 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
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 22:57:18 +0000