+++ /dev/null
-/*\r
- * FreeRTOS+UDP V1.0.4\r
- * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
- *\r
- * Permission is hereby granted, free of charge, to any person obtaining a copy of\r
- * this software and associated documentation files (the "Software"), to deal in\r
- * the Software without restriction, including without limitation the rights to\r
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
- * the Software, and to permit persons to whom the Software is furnished to do so,\r
- * subject to the following conditions:\r
- *\r
- * The above copyright notice and this permission notice shall be included in all\r
- * copies or substantial portions of the Software.\r
- *\r
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
- *\r
- * http://www.FreeRTOS.org\r
- * http://aws.amazon.com/freertos\r
- *\r
- * 1 tab == 4 spaces!\r
- */\r
-\r
-/* Standard includes. */\r
-#include <stdint.h>\r
-\r
-/* FreeRTOS includes. */\r
-#include "FreeRTOS.h"\r
-#include "task.h"\r
-#include "queue.h"\r
-#include "timers.h"\r
-\r
-/* FreeRTOS+UDP includes. */\r
-#include "FreeRTOS_UDP_IP.h"\r
-#include "FreeRTOS_IP_Private.h"\r
-#include "FreeRTOS_DHCP.h"\r
-#include "FreeRTOS_Sockets.h"\r
-#include "NetworkInterface.h"\r
-#include "IPTraceMacroDefaults.h"\r
-\r
-/* Exclude the entire file if DHCP is not enabled. */\r
-#if ipconfigUSE_DHCP != 0\r
-\r
-#if ( ipconfigUSE_DHCP != 0 ) && ( ipconfigNETWORK_MTU < 586 )\r
- /* DHCP must be able to receive an options field of 312 bytes, the fixed\r
- part of the DHCP packet is 240 bytes, and the IP/UDP headers take 28 bytes. */\r
- #error ipconfigNETWORK_MTU needs to be at least 586 to use DHCP (588 if ipconfigCAN_FRAGMENT_OUTGOING_PACKETS is set to 1)\r
-#endif\r
-\r
-/* Parameter widths in the DHCP packet. */\r
-#define dhcpCLIENT_HARDWARE_ADDRESS_LENGTH 16\r
-#define dhcpSERVER_HOST_NAME_LENGTH 64\r
-#define dhcpBOOT_FILE_NAME_LENGTH 128\r
-\r
-/* Timer parameters. Windows simulator times are much shorter because simulated\r
-time is not real time. */\r
-#ifdef _WINDOWS_\r
- #define dhcpINITIAL_DHCP_TX_PERIOD ( 100 / portTICK_RATE_MS )\r
- #define dhcpINITIAL_TIMER_PERIOD ( 10 / portTICK_RATE_MS )\r
- #define dhcpMAX_TIME_TO_WAIT_FOR_ACK ( 200 / portTICK_RATE_MS )\r
-#else\r
- #define dhcpINITIAL_DHCP_TX_PERIOD ( 5000 / portTICK_RATE_MS )\r
- #define dhcpINITIAL_TIMER_PERIOD ( 250 / portTICK_RATE_MS )\r
- #define dhcpMAX_TIME_TO_WAIT_FOR_ACK ( 5000 / portTICK_RATE_MS )\r
-#endif /* _WINDOWS_ */\r
-\r
-/* Codes of interest found in the DHCP options field. */\r
-#define dhcpSUBNET_MASK_OPTION_CODE ( 1 )\r
-#define dhcpGATEWAY_OPTION_CODE ( 3 )\r
-#define hdcpDNS_SERVER_OPTIONS_CODE ( 6 )\r
-#define dhcpMESSAGE_TYPE_OPTION_CODE ( 53 )\r
-#define dhcpLEASE_TIME_OPTION_CODE ( 51 )\r
-#define dhcpCLIENT_IDENTIFIER_OPTION_CODE ( 61 )\r
-#define dhcpPARAMETER_REQUEST_OPTION_CODE ( 55 )\r
-#define dhcpREQUEST_IP_ADDRESS_OPTION_CODE ( 50 )\r
-#define dhcpSERVER_IP_ADDRESS_OPTION_CODE ( 54 )\r
-\r
-/* The four DHCP message types of interest. */\r
-#define dhcpMESSAGE_TYPE_DISCOVER ( 1 )\r
-#define dhcpMESSAGE_TYPE_OFFER ( 2 )\r
-#define dhcpMESSAGE_TYPE_REQUEST ( 3 )\r
-#define dhcpMESSAGE_TYPE_ACK ( 5 )\r
-#define dhcpMESSAGE_TYPE_NACK ( 6 )\r
-\r
-/* Offsets into the transmitted DHCP options fields at which various parameters\r
-are located. */\r
-#define dhcpCLIENT_IDENTIFIER_OFFSET ( 5 )\r
-#define dhcpREQUESTED_IP_ADDRESS_OFFSET ( 13 )\r
-#define dhcpDHCP_SERVER_IP_ADDRESS_OFFSET ( 19 )\r
-\r
-/* Values used in the DHCP packets. */\r
-#define dhcpREQUEST_OPCODE ( 1 )\r
-#define dhcpREPLY_OPCODE ( 2 )\r
-#define dhcpADDRESS_TYPE_ETHERNET ( 1 )\r
-#define dhcpETHERNET_ADDRESS_LENGTH ( 6 )\r
-\r
-/* If a lease time is not received, use the default of two days. */\r
-#define dhcpDEFAULT_LEASE_TIME ( ( 48UL * 60UL * 60UL * 1000UL ) / portTICK_RATE_MS ) /* 48 hours in ticks. */\r
-\r
-/* Don't allow the lease time to be too short. */\r
-#define dhcpMINIMUM_LEASE_TIME ( 60000UL / portTICK_RATE_MS ) /* 60 seconds in ticks. */\r
-\r
-/* Marks the end of the variable length options field in the DHCP packet. */\r
-#define dhcpOPTION_END_BYTE 0xff\r
-\r
-/* Offset into a DHCP message at which the first byte of the options is\r
-located. */\r
-#define dhcpFIRST_OPTION_BYTE_OFFSET ( 0xf0 )\r
-\r
-/* When walking the variable length options field, the following value is used\r
-to ensure the walk has not gone past the end of the valid options. 2 bytes is\r
-made up of the length byte, and minimum one byte value. */\r
-#define dhcpMAX_OPTION_LENGTH_OF_INTEREST ( 2L )\r
-\r
-/* Standard DHCP port numbers and magic cookie value. */\r
-#if( ipconfigBYTE_ORDER == FREERTOS_LITTLE_ENDIAN )\r
- #define dhcpCLIENT_PORT 0x4400\r
- #define dhcpSERVER_PORT 0x4300\r
- #define dhcpCOOKIE 0x63538263\r
- #define dhcpBROADCAST 0x0080\r
-#else\r
- #define dhcpCLIENT_PORT 0x0044\r
- #define dhcpSERVER_PORT 0x0043\r
- #define dhcpCOOKIE 0x63825363\r
- #define dhcpBROADCAST 0x8000\r
-#endif /* ipconfigBYTE_ORDER */\r
-\r
-#include "pack_struct_start.h"\r
-struct xDHCPMessage\r
-{\r
- uint8_t ucOpcode;\r
- uint8_t ucAddressType;\r
- uint8_t ucAddressLength;\r
- uint8_t ucHops;\r
- uint32_t ulTransactionID;\r
- uint16_t usElapsedTime;\r
- uint16_t usFlags;\r
- uint32_t ulClientIPAddress_ciaddr;\r
- uint32_t ulYourIPAddress_yiaddr;\r
- uint32_t ulServerIPAddress_siaddr;\r
- uint32_t ulRelayAgentIPAddress_giaddr;\r
- uint8_t ucClientHardwareAddress[ dhcpCLIENT_HARDWARE_ADDRESS_LENGTH ];\r
- uint8_t ucServerHostName[ dhcpSERVER_HOST_NAME_LENGTH ];\r
- uint8_t ucBootFileName[ dhcpBOOT_FILE_NAME_LENGTH ];\r
- uint32_t ulDHCPCookie;\r
- uint8_t ucFirstOptionByte;\r
-}\r
-#include "pack_struct_end.h"\r
-typedef struct xDHCPMessage xDHCPMessage_t;\r
-\r
-/* DHCP state machine states. */\r
-typedef enum\r
-{\r
- eWaitingSendFirstDiscover = 0, /* Initial state. Send a discover the first time it is called, and reset all timers. */\r
- eWaitingOffer, /* Either resend the discover, or, if the offer is forthcoming, send a request. */\r
- eWaitingAcknowledge, /* Either resend the request. */\r
- eLeasedAddress, /* Resend the request at the appropriate time to renew the lease. */\r
- eNotUsingLeasedAddress /* DHCP failed, and a default IP address is being used. */\r
-} eDHCPState_t;\r
-\r
-/*\r
- * Generate a DHCP discover message and send it on the DHCP socket.\r
- */\r
-static void prvSendDHCPDiscover( xMACAddress_t *pxMACAddress );\r
-\r
-/*\r
- * Interpret message received on the DHCP socket.\r
- */\r
-static BaseType_t prvProcessDHCPReplies( uint8_t ucExpectedMessageType, xMACAddress_t *pxMACAddress, xNetworkAddressingParameters_t *pxNetworkAddressing );\r
-\r
-/*\r
- * Generate a DHCP request packet, and send it on the DHCP socket.\r
- */\r
-static void prvSendDHCPRequest( xMACAddress_t *pxMACAddress );\r
-\r
-/*\r
- * Prepare to start a DHCP transaction. This initialises some state variables\r
- * and creates the DHCP socket if necessary.\r
- */\r
-static void prvInitialiseDHCP( void );\r
-\r
-/*\r
- * Creates the part of outgoing DHCP messages that are common to all outgoing\r
- * DHCP messages.\r
- */\r
-static uint8_t *prvCreatePartDHCPMessage( struct freertos_sockaddr *pxAddress, xMACAddress_t *pxMACAddress, uint8_t ucOpcode, const uint8_t * const pucOptionsArray, size_t xOptionsArraySize );\r
-\r
-/*\r
- * Create the DHCP socket, if it has not been created already.\r
- */\r
-static void prvCreateDHCPSocket( void );\r
-\r
-/*-----------------------------------------------------------*/\r
-\r
-/* The timer used to drive the DHCP state machine. */\r
-static xTimerHandle xDHCPTimer = NULL;\r
-\r
-/* The UDP socket used for all incoming and outgoing DHCP traffic. */\r
-static xSocket_t xDHCPSocket = NULL;\r
-\r
-/* Hold information in between steps in the DHCP state machine. */\r
-static uint32_t ulTransactionId = 0UL, ulOfferedIPAddress = 0UL, ulDHCPServerAddress = 0UL, ulLeaseTime = 0;\r
-\r
-/* Hold information on the current timer state. */\r
-static TickType_t xDHCPTxTime = 0x00, xDHCPTxPeriod = 0x00;\r
-\r
-/* Maintains the DHCP state machine state. */\r
-static eDHCPState_t eDHCPState = eWaitingSendFirstDiscover;\r
-\r
-/*-----------------------------------------------------------*/\r
-\r
-void vDHCPProcess( BaseType_t xReset, xMACAddress_t *pxMACAddress, uint32_t *pulIPAddress, xNetworkAddressingParameters_t *pxNetworkAddressing )\r
-{\r
- if( xReset != pdFALSE )\r
- {\r
- eDHCPState = eWaitingSendFirstDiscover;\r
- }\r
-\r
- switch( eDHCPState )\r
- {\r
- case eWaitingSendFirstDiscover :\r
-\r
- /* Initial state. Create the DHCP socket, timer, etc. if they\r
- have not already been created. */\r
- prvInitialiseDHCP();\r
- *pulIPAddress = 0UL;\r
-\r
- /* Send the first discover request. */\r
- if( xDHCPSocket != NULL )\r
- {\r
- xDHCPTxTime = xTaskGetTickCount();\r
- prvSendDHCPDiscover( pxMACAddress );\r
- eDHCPState = eWaitingOffer;\r
- }\r
- break;\r
-\r
- case eWaitingOffer :\r
-\r
- /* Look for offers coming in. */\r
- if( prvProcessDHCPReplies( dhcpMESSAGE_TYPE_OFFER, pxMACAddress, pxNetworkAddressing ) == pdPASS )\r
- {\r
- /* An offer has been made, generate the request. */\r
- xDHCPTxTime = xTaskGetTickCount();\r
- xDHCPTxPeriod = dhcpINITIAL_DHCP_TX_PERIOD;\r
- prvSendDHCPRequest( pxMACAddress );\r
- eDHCPState = eWaitingAcknowledge;\r
- }\r
- else\r
- {\r
- /* Is it time to send another Discover? */\r
- if( ( xTaskGetTickCount() - xDHCPTxTime ) > xDHCPTxPeriod )\r
- {\r
- /* Increase the time period, and if it has not got to the\r
- point of giving up - send another discovery. */\r
- xDHCPTxPeriod <<= 1;\r
- if( xDHCPTxPeriod <= ipconfigMAXIMUM_DISCOVER_TX_PERIOD )\r
- {\r
- ulTransactionId++;\r
- xDHCPTxTime = xTaskGetTickCount();\r
- prvSendDHCPDiscover( pxMACAddress );\r
- }\r
- else\r
- {\r
- /* Revert to static IP address. */\r
- taskENTER_CRITICAL();\r
- {\r
- *pulIPAddress = pxNetworkAddressing->ulDefaultIPAddress;\r
- iptraceDHCP_REQUESTS_FAILED_USING_DEFAULT_IP_ADDRESS( pxNetworkAddressing->ulDefaultIPAddress );\r
- }\r
- taskEXIT_CRITICAL();\r
- eDHCPState = eNotUsingLeasedAddress;\r
- xTimerStop( xDHCPTimer, ( TickType_t ) 0 );\r
-\r
- #if ipconfigUSE_NETWORK_EVENT_HOOK == 1\r
- {\r
- vApplicationIPNetworkEventHook( eNetworkUp );\r
- }\r
- #endif\r
-\r
- /* Static configuration is being used, so the network is now up. */\r
- #if ipconfigFREERTOS_PLUS_NABTO == 1\r
- {\r
- /* Return value is used in configASSERT() inside the\r
- function. */\r
- ( void ) xStartNabtoTask();\r
- }\r
- #endif /* ipconfigFREERTOS_PLUS_NABTO */\r
-\r
- /* Close socket to ensure packets don't queue on it. */\r
- FreeRTOS_closesocket( xDHCPSocket );\r
- xDHCPSocket = NULL;\r
- }\r
- }\r
- }\r
- break;\r
-\r
- case eWaitingAcknowledge :\r
-\r
- /* Look for acks coming in. */\r
- if( prvProcessDHCPReplies( dhcpMESSAGE_TYPE_ACK, pxMACAddress, pxNetworkAddressing ) == pdPASS )\r
- {\r
- /* DHCP completed. The IP address can now be used, and the\r
- timer set to the lease timeout time. */\r
- *pulIPAddress = ulOfferedIPAddress;\r
- eDHCPState = eLeasedAddress;\r
-\r
- #if ipconfigUSE_NETWORK_EVENT_HOOK == 1\r
- {\r
- vApplicationIPNetworkEventHook( eNetworkUp );\r
- }\r
- #endif\r
-\r
- /* Static configuration is being used, so the network is now\r
- up. */\r
- #if ipconfigFREERTOS_PLUS_NABTO == 1\r
- {\r
- /* Return value is used in configASSERT() inside the\r
- function. */\r
- ( void ) xStartNabtoTask();\r
- }\r
- #endif /* ipconfigFREERTOS_PLUS_NABTO */\r
-\r
- /* Close socket to ensure packets don't queue on it. */\r
- FreeRTOS_closesocket( xDHCPSocket );\r
- xDHCPSocket = NULL;\r
-\r
- if( ulLeaseTime == 0UL )\r
- {\r
- ulLeaseTime = dhcpDEFAULT_LEASE_TIME;\r
- }\r
- else if( ulLeaseTime < dhcpMINIMUM_LEASE_TIME )\r
- {\r
- ulLeaseTime = dhcpMINIMUM_LEASE_TIME;\r
- }\r
- else\r
- {\r
- /* The lease time is already valid. */\r
- }\r
-\r
- xTimerChangePeriod( xDHCPTimer, ulLeaseTime, portMAX_DELAY );\r
- }\r
- else\r
- {\r
- /* Is it time to send another Discover? */\r
- if( ( xTaskGetTickCount() - xDHCPTxTime ) > xDHCPTxPeriod )\r
- {\r
- /* Increase the time period, and if it has not got to the\r
- point of giving up - send another request. */\r
- xDHCPTxPeriod <<= 1;\r
- if( xDHCPTxPeriod <= ipconfigMAXIMUM_DISCOVER_TX_PERIOD )\r
- {\r
- xDHCPTxTime = xTaskGetTickCount();\r
- prvSendDHCPRequest( pxMACAddress );\r
- }\r
- else\r
- {\r
- /* Give up, start again. */\r
- eDHCPState = eWaitingSendFirstDiscover;\r
- }\r
- }\r
- }\r
- break;\r
-\r
- case eLeasedAddress :\r
-\r
- /* Resend the request at the appropriate time to renew the lease. */\r
- prvCreateDHCPSocket();\r
- if( xDHCPSocket != NULL )\r
- {\r
- xDHCPTxTime = xTaskGetTickCount();\r
- xDHCPTxPeriod = dhcpINITIAL_DHCP_TX_PERIOD;\r
- prvSendDHCPRequest( pxMACAddress );\r
- eDHCPState = eWaitingAcknowledge;\r
- }\r
- xTimerChangePeriod( xDHCPTimer, dhcpINITIAL_TIMER_PERIOD, portMAX_DELAY );\r
- break;\r
-\r
- case eNotUsingLeasedAddress:\r
- xTimerStop( xDHCPTimer, ( TickType_t ) 0 );\r
- break;\r
- }\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-static void prvCreateDHCPSocket( void )\r
-{\r
-struct freertos_sockaddr xAddress;\r
-BaseType_t xReturn;\r
-TickType_t xTimeoutTime = 0;\r
-\r
- /* Create the socket, if it has not already been created. */\r
- if( xDHCPSocket == NULL )\r
- {\r
- xDHCPSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );\r
- configASSERT( ( xDHCPSocket != FREERTOS_INVALID_SOCKET ) );\r
-\r
- /* Ensure the Rx and Tx timeouts are zero as the DHCP executes in the\r
- context of the IP task. */\r
- FreeRTOS_setsockopt( xDHCPSocket, 0, FREERTOS_SO_RCVTIMEO, ( void * ) &xTimeoutTime, sizeof( TickType_t ) );\r
- FreeRTOS_setsockopt( xDHCPSocket, 0, FREERTOS_SO_SNDTIMEO, ( void * ) &xTimeoutTime, sizeof( TickType_t ) );\r
-\r
- /* Bind to the standard DHCP client port. */\r
- xAddress.sin_port = dhcpCLIENT_PORT;\r
- xReturn = FreeRTOS_bind( xDHCPSocket, &xAddress, sizeof( xAddress ) );\r
- configASSERT( xReturn == 0 );\r
-\r
- /* Remove compiler warnings if configASSERT() is not defined. */\r
- ( void ) xReturn;\r
- }\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-static void prvInitialiseDHCP( void )\r
-{\r
-extern void vIPFunctionsTimerCallback( xTimerHandle xTimer );\r
-\r
- /* Initialise the parameters that will be set by the DHCP process. */\r
- if( ulTransactionId == 0 )\r
- {\r
- ulTransactionId = ipconfigRAND32();\r
- }\r
- else\r
- {\r
- ulTransactionId++;\r
- }\r
- ulOfferedIPAddress = 0UL;\r
- ulDHCPServerAddress = 0UL;\r
- xDHCPTxPeriod = dhcpINITIAL_DHCP_TX_PERIOD;\r
-\r
- /* Create the DHCP socket if it has not already been created. */\r
- prvCreateDHCPSocket();\r
-\r
- if( xDHCPTimer == NULL )\r
- {\r
- xDHCPTimer = xTimerCreate( "DHCP", dhcpINITIAL_TIMER_PERIOD, pdTRUE, ( void * ) eDHCPEvent, vIPFunctionsTimerCallback );\r
- configASSERT( xDHCPTimer );\r
- xTimerStart( xDHCPTimer, portMAX_DELAY );\r
- }\r
- else\r
- {\r
- xTimerChangePeriod( xDHCPTimer, dhcpINITIAL_TIMER_PERIOD, portMAX_DELAY );\r
- }\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-static BaseType_t prvProcessDHCPReplies( uint8_t ucExpectedMessageType, xMACAddress_t *pxMACAddress, xNetworkAddressingParameters_t *pxNetworkAddressing )\r
-{\r
-uint8_t *pucUDPPayload, *pucLastByte;\r
-struct freertos_sockaddr xClient;\r
-uint32_t xClientLength = sizeof( xClient );\r
-int32_t lBytes;\r
-xDHCPMessage_t *pxDHCPMessage;\r
-uint8_t *pucByte, ucOptionCode, ucLength;\r
-uint32_t ulProcessed;\r
-BaseType_t xReturn = pdFALSE;\r
-const uint32_t ulMandatoryOptions = 2; /* DHCP server address, and the correct DHCP message type must be present in the options. */\r
-\r
- lBytes = FreeRTOS_recvfrom( xDHCPSocket, ( void * ) &pucUDPPayload, 0, FREERTOS_ZERO_COPY, &xClient, &xClientLength );\r
-\r
- if( lBytes > 0 )\r
- {\r
- /* Map a DHCP structure onto the received data. */\r
- pxDHCPMessage = ( xDHCPMessage_t * ) ( pucUDPPayload );\r
-\r
- /* Sanity check. */\r
- if( ( pxDHCPMessage->ulDHCPCookie == dhcpCOOKIE ) && ( pxDHCPMessage->ucOpcode == dhcpREPLY_OPCODE ) && ( pxDHCPMessage->ulTransactionID == ulTransactionId ) )\r
- {\r
- if( memcmp( ( void * ) &( pxDHCPMessage->ucClientHardwareAddress ), ( void * ) pxMACAddress, sizeof( xMACAddress_t ) ) == 0 )\r
- {\r
- /* None of the essential options have been processed yet. */\r
- ulProcessed = 0;\r
-\r
- /* Walk through the options until the dhcpOPTION_END_BYTE byte\r
- is found, taking care not to walk off the end of the options. */\r
- pucByte = &( pxDHCPMessage->ucFirstOptionByte );\r
- pucLastByte = &( pucUDPPayload[ lBytes - dhcpMAX_OPTION_LENGTH_OF_INTEREST ] );\r
- while( ( *pucByte != dhcpOPTION_END_BYTE ) && ( pucByte < pucLastByte ) )\r
- {\r
- ucOptionCode = *pucByte;\r
- pucByte++;\r
- ucLength = *pucByte;\r
- pucByte++;\r
-\r
- switch( ucOptionCode )\r
- {\r
- case dhcpMESSAGE_TYPE_OPTION_CODE :\r
-\r
- if( *pucByte == ucExpectedMessageType )\r
- {\r
- /* The message type is the message type the\r
- state machine is expecting. */\r
- ulProcessed++;\r
- }\r
- else if( *pucByte == dhcpMESSAGE_TYPE_NACK )\r
- {\r
- if( ucExpectedMessageType == dhcpMESSAGE_TYPE_ACK )\r
- {\r
- /* Start again. */\r
- eDHCPState = eWaitingSendFirstDiscover;\r
- }\r
- }\r
- else\r
- {\r
- /* Don't process other message types. */\r
- }\r
- break;\r
-\r
- case dhcpSUBNET_MASK_OPTION_CODE :\r
-\r
- if( ucLength == sizeof( uint32_t ) )\r
- {\r
- memcpy( ( void * ) &( pxNetworkAddressing->ulNetMask ), ( void * ) pucByte, ( size_t ) ucLength );\r
- }\r
- break;\r
-\r
- case dhcpGATEWAY_OPTION_CODE :\r
-\r
- if( ucLength == sizeof( uint32_t ) )\r
- {\r
- /* ulProcessed is not incremented in this case\r
- because the gateway is not essential. */\r
- memcpy( ( void * ) &( pxNetworkAddressing->ulGatewayAddress ), ( void * ) pucByte, ( size_t ) ucLength );\r
- }\r
- break;\r
-\r
- case hdcpDNS_SERVER_OPTIONS_CODE :\r
-\r
- /* ulProcessed is not incremented in this case\r
- because the DNS server is not essential. Only the\r
- first DNS server address is taken. */\r
- memcpy( ( void * ) &( pxNetworkAddressing->ulDNSServerAddress ), ( void * ) pucByte, sizeof( uint32_t ) );\r
- break;\r
-\r
- case dhcpSERVER_IP_ADDRESS_OPTION_CODE :\r
-\r
- if( ucLength == sizeof( uint32_t ) )\r
- {\r
- if( ucExpectedMessageType == dhcpMESSAGE_TYPE_OFFER )\r
- {\r
- /* Offers state the replying server. */\r
- ulProcessed++;\r
- memcpy( ( void * ) &ulDHCPServerAddress, ( void * ) pucByte, ( size_t ) ucLength );\r
- }\r
- else\r
- {\r
- /* The ack must come from the expected server. */\r
- if( memcmp( ( void * ) &ulDHCPServerAddress, ( void * ) pucByte, ( size_t ) ucLength ) == 0 )\r
- {\r
- ulProcessed++;\r
- }\r
- }\r
- }\r
- break;\r
-\r
- case dhcpLEASE_TIME_OPTION_CODE :\r
-\r
- if( ucLength == sizeof( &ulLeaseTime ) )\r
- {\r
- /* ulProcessed is not incremented in this case\r
- because the lease time is not essential. */\r
- memcpy( ( void * ) &ulLeaseTime, ( void * ) pucByte, ( size_t ) ucLength );\r
- ulLeaseTime = FreeRTOS_ntohl( ulLeaseTime );\r
-\r
- /* Convert the lease time to milliseconds\r
- (*1000) then ticks (/portTICK_RATE_MS). */\r
- ulLeaseTime *= ( 1000UL / portTICK_RATE_MS );\r
-\r
- /* Divide the lease time to ensure a renew\r
- request is sent before the lease actually\r
- expires. */\r
- ulLeaseTime >>= 1UL;\r
- }\r
- break;\r
-\r
- default :\r
-\r
- /* Not interested in this field. */\r
-\r
- break;\r
- }\r
-\r
- /* Jump over the data to find the next option code. */\r
- if( ucLength == 0 )\r
- {\r
- break;\r
- }\r
- else\r
- {\r
- pucByte += ucLength;\r
- }\r
- }\r
-\r
- /* Were all the mandatory options received? */\r
- if( ulProcessed == ulMandatoryOptions )\r
- {\r
- ulOfferedIPAddress = pxDHCPMessage->ulYourIPAddress_yiaddr;\r
- xReturn = pdPASS;\r
- }\r
- }\r
- }\r
-\r
- FreeRTOS_ReleaseUDPPayloadBuffer( ( void * ) pucUDPPayload );\r
- }\r
-\r
- return xReturn;\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-static uint8_t *prvCreatePartDHCPMessage( struct freertos_sockaddr *pxAddress, xMACAddress_t *pxMACAddress, uint8_t ucOpcode, const uint8_t * const pucOptionsArray, size_t xOptionsArraySize )\r
-{\r
-xDHCPMessage_t *pxDHCPMessage;\r
-const size_t xRequiredBufferSize = sizeof( xDHCPMessage_t ) + xOptionsArraySize;\r
-uint8_t *pucUDPPayloadBuffer;\r
-static uint8_t ucUseBroadcastFlag = pdFALSE;\r
-\r
- /* Get a buffer. This uses a maximum delay, but the delay will be capped\r
- to ipconfigMAX_SEND_BLOCK_TIME_TICKS so the return value still needs to be\r
- test. */\r
- do\r
- {\r
- }while( ( pucUDPPayloadBuffer = ( uint8_t * ) FreeRTOS_GetUDPPayloadBuffer( xRequiredBufferSize, portMAX_DELAY ) ) == NULL );\r
-\r
- pxDHCPMessage = ( xDHCPMessage_t * ) pucUDPPayloadBuffer;\r
-\r
- /* Most fields need to be zero. */\r
- memset( ( void * ) pxDHCPMessage, 0x00, sizeof( xDHCPMessage_t ) );\r
-\r
- /* Create the message. */\r
- pxDHCPMessage->ucOpcode = ucOpcode;\r
- pxDHCPMessage->ucAddressType = dhcpADDRESS_TYPE_ETHERNET;\r
- pxDHCPMessage->ucAddressLength = dhcpETHERNET_ADDRESS_LENGTH;\r
- pxDHCPMessage->ulTransactionID = ulTransactionId;\r
- pxDHCPMessage->ulDHCPCookie = dhcpCOOKIE;\r
-\r
- /* For maximum possibility of success, alternate between broadcast and non\r
- broadcast. */\r
- ucUseBroadcastFlag = !ucUseBroadcastFlag;\r
- if( ucUseBroadcastFlag == pdTRUE )\r
- {\r
- pxDHCPMessage->usFlags = dhcpBROADCAST;\r
- }\r
- else\r
- {\r
- pxDHCPMessage->usFlags = 0;\r
- }\r
-\r
- memcpy( ( void * ) &( pxDHCPMessage->ucClientHardwareAddress[ 0 ] ), ( void * ) pxMACAddress, sizeof( xMACAddress_t ) );\r
-\r
- /* Copy in the const part of the options options. */\r
- memcpy( ( void * ) &( pucUDPPayloadBuffer[ dhcpFIRST_OPTION_BYTE_OFFSET ] ), ( void * ) pucOptionsArray, xOptionsArraySize );\r
-\r
- /* Map in the client identifier. */\r
- memcpy( ( void * ) &( pucUDPPayloadBuffer[ dhcpFIRST_OPTION_BYTE_OFFSET + dhcpCLIENT_IDENTIFIER_OFFSET ] ), ( void * ) pxMACAddress, sizeof( xMACAddress_t ) );\r
-\r
- /* Set the addressing. */\r
- pxAddress->sin_addr = ipBROADCAST_IP_ADDRESS;\r
- pxAddress->sin_port = ( uint16_t ) dhcpSERVER_PORT;\r
-\r
- return pucUDPPayloadBuffer;\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-static void prvSendDHCPRequest( xMACAddress_t *pxMACAddress )\r
-{\r
-uint8_t *pucUDPPayloadBuffer;\r
-struct freertos_sockaddr xAddress;\r
-static const uint8_t ucDHCPRequestOptions[] =\r
-{\r
- /* Do not change the ordering without also changing\r
- dhcpCLIENT_IDENTIFIER_OFFSET, dhcpREQUESTED_IP_ADDRESS_OFFSET and\r
- dhcpDHCP_SERVER_IP_ADDRESS_OFFSET. */\r
- dhcpMESSAGE_TYPE_OPTION_CODE, 1, dhcpMESSAGE_TYPE_REQUEST, /* Message type option. */\r
- dhcpCLIENT_IDENTIFIER_OPTION_CODE, 6, 0, 0, 0, 0, 0, 0, /* Client identifier. */\r
- dhcpREQUEST_IP_ADDRESS_OPTION_CODE, 4, 0, 0, 0, 0, /* The IP address being requested. */\r
- dhcpSERVER_IP_ADDRESS_OPTION_CODE, 4, 0, 0, 0, 0, /* The IP address of the DHCP server. */\r
- dhcpOPTION_END_BYTE\r
-};\r
-\r
- pucUDPPayloadBuffer = prvCreatePartDHCPMessage( &xAddress, pxMACAddress, dhcpREQUEST_OPCODE, ucDHCPRequestOptions, sizeof( ucDHCPRequestOptions ) );\r
-\r
- /* Copy in the IP address being requested. */\r
- memcpy( ( void * ) &( pucUDPPayloadBuffer[ dhcpFIRST_OPTION_BYTE_OFFSET + dhcpREQUESTED_IP_ADDRESS_OFFSET ] ), ( void * ) &ulOfferedIPAddress, sizeof( ulOfferedIPAddress ) );\r
-\r
- /* Copy in the address of the DHCP server being used. */\r
- memcpy( ( void * ) &( pucUDPPayloadBuffer[ dhcpFIRST_OPTION_BYTE_OFFSET + dhcpDHCP_SERVER_IP_ADDRESS_OFFSET ] ), ( void * ) &ulDHCPServerAddress, sizeof( ulDHCPServerAddress ) );\r
-\r
- iptraceSENDING_DHCP_REQUEST();\r
- if( FreeRTOS_sendto( xDHCPSocket, pucUDPPayloadBuffer, ( sizeof( xDHCPMessage_t ) + sizeof( ucDHCPRequestOptions ) ), FREERTOS_ZERO_COPY, &xAddress, sizeof( xAddress ) ) == 0 )\r
- {\r
- /* The packet was not successfully queued for sending and must be\r
- returned to the stack. */\r
- FreeRTOS_ReleaseUDPPayloadBuffer( pucUDPPayloadBuffer );\r
- }\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-static void prvSendDHCPDiscover( xMACAddress_t *pxMACAddress )\r
-{\r
-uint8_t *pucUDPPayloadBuffer;\r
-struct freertos_sockaddr xAddress;\r
-static const uint8_t ucDHCPDiscoverOptions[] =\r
-{\r
- /* Do not change the ordering without also changing dhcpCLIENT_IDENTIFIER_OFFSET. */\r
- dhcpMESSAGE_TYPE_OPTION_CODE, 1, dhcpMESSAGE_TYPE_DISCOVER, /* Message type option. */\r
- dhcpCLIENT_IDENTIFIER_OPTION_CODE, 6, 0, 0, 0, 0, 0, 0, /* Client identifier. */\r
- dhcpPARAMETER_REQUEST_OPTION_CODE, 3, dhcpSUBNET_MASK_OPTION_CODE, dhcpGATEWAY_OPTION_CODE, hdcpDNS_SERVER_OPTIONS_CODE, /* Parameter request option. */\r
- dhcpOPTION_END_BYTE\r
-};\r
-\r
- pucUDPPayloadBuffer = prvCreatePartDHCPMessage( &xAddress, pxMACAddress, dhcpREQUEST_OPCODE, ucDHCPDiscoverOptions, sizeof( ucDHCPDiscoverOptions ) );\r
-\r
- iptraceSENDING_DHCP_DISCOVER();\r
- if( FreeRTOS_sendto( xDHCPSocket, pucUDPPayloadBuffer, ( sizeof( xDHCPMessage_t ) + sizeof( ucDHCPDiscoverOptions ) ), FREERTOS_ZERO_COPY, &xAddress, sizeof( xAddress ) ) == 0 )\r
- {\r
- /* The packet was not successfully queued for sending and must be\r
- returned to the stack. */\r
- FreeRTOS_ReleaseUDPPayloadBuffer( pucUDPPayloadBuffer );\r
- }\r
-}\r
-/*-----------------------------------------------------------*/\r
-\r
-#endif /* ipconfigUSE_DHCP != 0 */\r
-\r
-\r
projects / freertos / blobdiff