2 * FreeRTOS+UDP V1.0.0 (C) 2013 Real Time Engineers ltd.
\r
4 * FreeRTOS+UDP is an add-on component to FreeRTOS. It is not, in itself, part
\r
5 * of the FreeRTOS kernel. FreeRTOS+UDP is licensed separately from FreeRTOS,
\r
6 * and uses a different license to FreeRTOS. FreeRTOS+UDP uses a dual license
\r
7 * model, information on which is provided below:
\r
9 * - Open source licensing -
\r
10 * FreeRTOS+UDP is a free download and may be used, modified and distributed
\r
11 * without charge provided the user adheres to version two of the GNU General
\r
12 * Public license (GPL) and does not remove the copyright notice or this text.
\r
13 * The GPL V2 text is available on the gnu.org web site, and on the following
\r
14 * URL: http://www.FreeRTOS.org/gpl-2.0.txt
\r
16 * - Commercial licensing -
\r
17 * Businesses and individuals who wish to incorporate FreeRTOS+UDP into
\r
18 * proprietary software for redistribution in any form must first obtain a
\r
19 * (very) low cost commercial license - and in-so-doing support the maintenance,
\r
20 * support and further development of the FreeRTOS+UDP product. Commercial
\r
21 * licenses can be obtained from http://shop.freertos.org and do not require any
\r
22 * source files to be changed.
\r
24 * FreeRTOS+UDP is distributed in the hope that it will be useful. You cannot
\r
25 * use FreeRTOS+UDP unless you agree that you use the software 'as is'.
\r
26 * FreeRTOS+UDP is provided WITHOUT ANY WARRANTY; without even the implied
\r
27 * warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A PARTICULAR
\r
28 * PURPOSE. Real Time Engineers Ltd. disclaims all conditions and terms, be they
\r
29 * implied, expressed, or statutory.
\r
31 * 1 tab == 4 spaces!
\r
33 * http://www.FreeRTOS.org
\r
34 * http://www.FreeRTOS.org/udp
\r
38 #ifndef FREERTOS_IP_PRIVATE_H
\r
39 #define FREERTOS_IP_PRIVATE_H
\r
41 /* Application level configuration options. */
\r
42 #include "FreeRTOSIPConfig.h"
\r
43 #include "IPTraceMacroDefaults.h"
\r
45 typedef struct xNetworkAddressingParameters
\r
47 uint32_t ulDefaultIPAddress;
\r
49 uint32_t ulGatewayAddress;
\r
50 uint32_t ulDNSServerAddress;
\r
51 } xNetworkAddressingParameters_t;
\r
54 /*-----------------------------------------------------------*/
\r
55 /* Protocol headers. */
\r
56 /*-----------------------------------------------------------*/
\r
58 #include "pack_struct_start.h"
\r
61 xMACAddress_t xDestinationAddress;
\r
62 xMACAddress_t xSourceAddress;
\r
63 uint16_t usFrameType;
\r
65 #include "pack_struct_end.h"
\r
66 typedef struct xETH_HEADER xEthernetHeader_t;
\r
68 #include "pack_struct_start.h"
\r
71 uint16_t usHardwareType;
\r
72 uint16_t usProtocolType;
\r
73 uint8_t ucHardwareAddressLength;
\r
74 uint8_t ucProtocolAddressLength;
\r
75 uint16_t usOperation;
\r
76 xMACAddress_t xSenderHardwareAddress;
\r
77 uint32_t ulSenderProtocolAddress;
\r
78 xMACAddress_t xTargetHardwareAddress;
\r
79 uint32_t ulTargetProtocolAddress;
\r
81 #include "pack_struct_end.h"
\r
82 typedef struct xARP_HEADER xARPHeader_t;
\r
84 #include "pack_struct_start.h"
\r
87 uint8_t ucVersionHeaderLength;
\r
88 uint8_t ucDifferentiatedServicesCode;
\r
90 uint16_t usIdentification;
\r
91 uint16_t usFragmentOffset;
\r
92 uint8_t ucTimeToLive;
\r
94 uint16_t usHeaderChecksum;
\r
95 uint32_t ulSourceIPAddress;
\r
96 uint32_t ulDestinationIPAddress;
\r
98 #include "pack_struct_end.h"
\r
99 typedef struct xIP_HEADER xIPHeader_t;
\r
100 #define ipSIZE_OF_IP_HEADER 20
\r
102 #include "pack_struct_start.h"
\r
103 struct xICMP_HEADER
\r
105 uint8_t ucTypeOfMessage;
\r
106 uint8_t ucTypeOfService;
\r
107 uint16_t usChecksum;
\r
108 uint16_t usIdentifier;
\r
109 uint16_t usSequenceNumber;
\r
111 #include "pack_struct_end.h"
\r
112 typedef struct xICMP_HEADER xICMPHeader_t;
\r
114 #include "pack_struct_start.h"
\r
117 uint16_t usSourcePort;
\r
118 uint16_t usDestinationPort;
\r
120 uint16_t usChecksum;
\r
122 #include "pack_struct_end.h"
\r
123 typedef struct xUDP_HEADER xUDPHeader_t;
\r
124 #define ipSIZE_OF_UDP_HEADER 8
\r
126 #include "pack_struct_start.h"
\r
127 struct xPSEUDO_HEADER
\r
129 uint32_t ulSourceAddress;
\r
130 uint32_t ulDestinationAddress;
\r
132 uint8_t ucProtocol;
\r
133 uint16_t usUDPLength;
\r
135 #include "pack_struct_end.h"
\r
136 typedef struct xPSEUDO_HEADER xPseudoHeader_t;
\r
138 /*-----------------------------------------------------------*/
\r
139 /* Nested protocol packets. */
\r
140 /*-----------------------------------------------------------*/
\r
142 #include "pack_struct_start.h"
\r
145 xEthernetHeader_t xEthernetHeader;
\r
146 xARPHeader_t xARPHeader;
\r
148 #include "pack_struct_end.h"
\r
149 typedef struct xARP_PACKET xARPPacket_t;
\r
151 #include "pack_struct_start.h"
\r
154 xEthernetHeader_t xEthernetHeader;
\r
155 xIPHeader_t xIPHeader;
\r
157 #include "pack_struct_end.h"
\r
158 typedef struct xIP_PACKET xIPPacket_t;
\r
160 #include "pack_struct_start.h"
\r
161 struct xICMP_PACKET
\r
163 xEthernetHeader_t xEthernetHeader;
\r
164 xIPHeader_t xIPHeader;
\r
165 xICMPHeader_t xICMPHeader;
\r
167 #include "pack_struct_end.h"
\r
168 typedef struct xICMP_PACKET xICMPPacket_t;
\r
170 #include "pack_struct_start.h"
\r
173 xEthernetHeader_t xEthernetHeader;
\r
174 xIPHeader_t xIPHeader;
\r
175 xUDPHeader_t xUDPHeader;
\r
177 #include "pack_struct_end.h"
\r
178 typedef struct xUDP_PACKET xUDPPacket_t;
\r
180 /* Dimensions the buffers that are filled by received Ethernet frames. */
\r
181 #define ipETHERNET_CRC_BYTES ( 4UL )
\r
182 #define ipETHERNET_OPTIONAL_802_1Q_TAG_BYTES ( 4UL )
\r
183 #define ipTOTAL_ETHERNET_FRAME_SIZE ( ipconfigNETWORK_MTU + sizeof( xEthernetHeader_t ) + ipETHERNET_CRC_BYTES + ipETHERNET_OPTIONAL_802_1Q_TAG_BYTES )
\r
185 /* The maximum UDP payload length. */
\r
186 #define ipMAX_UDP_PAYLOAD_LENGTH ( ( ipconfigNETWORK_MTU - ipSIZE_OF_IP_HEADER ) - ipSIZE_OF_UDP_HEADER )
\r
190 eReleaseBuffer = 0, /* Processing the frame did not find anything to do - just release the buffer. */
\r
191 eProcessBuffer, /* An Ethernet frame has a valid address - continue process its contents. */
\r
192 eReturnEthernetFrame, /* The Ethernet frame contains an ARP or ICMP packet that can be returned to its source. */
\r
193 eFrameConsumed /* Processing the Ethernet packet contents resulted in the payload being sent to the stack. */
\r
194 } eFrameProcessingResult_t;
\r
198 eNetworkDownEvent = 0, /* The network interface has been lost and/or needs [re]connecting. */
\r
199 eEthernetRxEvent, /* The network interface has queued a received Ethernet frame. */
\r
200 eARPTimerEvent, /* The ARP timer expired. */
\r
201 eStackTxEvent, /* The software stack has queued a packet to transmit. */
\r
202 eDHCPEvent /* Process the DHCP state machine. */
\r
205 typedef struct IP_TASK_COMMANDS
\r
207 eIPEvent_t eEventType;
\r
211 #define ipBROADCAST_IP_ADDRESS 0xffffffffUL
\r
213 /* Offset into the Ethernet frame that is used to temporarily store information
\r
214 on the fragmentation status of the packet being sent. The value is important,
\r
215 as it is past the location into which the destination address will get placed. */
\r
216 #define ipFRAGMENTATION_PARAMETERS_OFFSET ( 6 )
\r
217 #define ipSOCKET_OPTIONS_OFFSET ( 6 )
\r
219 /* Only used when outgoing fragmentation is being used (FreeRTOSIPConfig.h
\r
221 #define ipGET_UDP_PAYLOAD_OFFSET_FOR_FRAGMENT( usFragmentOffset ) ( ( ( usFragmentOffset ) == 0 ) ? ipUDP_PAYLOAD_OFFSET : ipIP_PAYLOAD_OFFSET )
\r
223 /* The offset into a UDP packet at which the UDP data (payload) starts. */
\r
224 #define ipUDP_PAYLOAD_OFFSET ( sizeof( xUDPPacket_t ) )
\r
226 /* The offset into an IP packet into which the IP data (payload) starts. */
\r
227 #define ipIP_PAYLOAD_OFFSET ( sizeof( xIPPacket_t ) )
\r
229 /* Space left at the beginning of a network buffer storage area to store a
\r
230 pointer back to the network buffer. Should be a multiple of 8 to ensure
\r
231 8 byte alignment is maintained on architectures that require it. */
\r
232 #define ipBUFFER_PADDING ( 8 )
\r
234 #include "pack_struct_start.h"
\r
235 struct xUDP_IP_FRACMENT_PARAMETERS
\r
237 uint8_t ucSocketOptions;
\r
238 uint8_t ucPadFor16BitAlignment;
\r
239 uint16_t usFragmentedPacketOffset;
\r
240 uint16_t usFragmentLength;
\r
241 uint16_t usPayloadChecksum;
\r
243 #include "pack_struct_end.h"
\r
244 typedef struct xUDP_IP_FRACMENT_PARAMETERS xIPFragmentParameters_t;
\r
246 #if( ipconfigBYTE_ORDER == FREERTOS_LITTLE_ENDIAN )
\r
248 /* Ethernet frame types. */
\r
249 #define ipARP_TYPE ( 0x0608U )
\r
250 #define ipIP_TYPE ( 0x0008U )
\r
252 /* ARP related definitions. */
\r
253 #define ipARP_PROTOCOL_TYPE ( 0x0008U )
\r
254 #define ipARP_HARDWARE_TYPE_ETHERNET ( 0x0100U )
\r
255 #define ipARP_REQUEST ( 0x0100 )
\r
256 #define ipARP_REPLY ( 0x0200 )
\r
260 /* Ethernet frame types. */
\r
261 #define ipARP_TYPE ( 0x0806U )
\r
262 #define ipIP_TYPE ( 0x0800U )
\r
264 /* ARP related definitions. */
\r
265 #define ipARP_PROTOCOL_TYPE ( 0x0800U )
\r
266 #define ipARP_HARDWARE_TYPE_ETHERNET ( 0x0001U )
\r
267 #define ipARP_REQUEST ( 0x0001 )
\r
268 #define ipARP_REPLY ( 0x0002 )
\r
270 #endif /* ipconfigBYTE_ORDER == FREERTOS_LITTLE_ENDIAN */
\r
272 /* The structure used to store buffers and pass them around the network stack.
\r
273 Buffers can be in use by the stack, in use by the network interface hardware
\r
274 driver, or free (not in use). */
\r
275 typedef struct xNETWORK_BUFFER
\r
277 xListItem xBufferListItem; /* Used to reference the buffer form the free buffer list or a socket. */
\r
278 uint32_t ulIPAddress; /* Source or destination IP address, depending on usage scenario. */
\r
279 uint8_t *pucEthernetBuffer; /* Pointer to the start of the Ethernet frame. */
\r
280 size_t xDataLength; /* Starts by holding the total Ethernet frame length, then the UDP payload length. */
\r
281 uint16_t usPort; /* Source or destination port, depending on usage scenario. */
\r
282 uint16_t usBoundPort; /* The port to which a transmitting socket is bound. */
\r
283 } xNetworkBufferDescriptor_t;
\r
285 void vNetworkBufferRelease( xNetworkBufferDescriptor_t * const pxNetworkBuffer );
\r
288 * A version of FreeRTOS_GetReleaseNetworkBuffer() that can be called from an
\r
289 * interrupt. If a non zero value is returned, then the calling ISR should
\r
290 * perform a context switch before exiting the ISR.
\r
292 portBASE_TYPE FreeRTOS_ReleaseFreeNetworkBufferFromISR( void );
\r
295 * Create a message that contains a command to initialise the network interface.
\r
296 * This is used during initialisation, and at any time the network interface
\r
297 * goes down thereafter. The network interface hardware driver is responsible
\r
298 * for sending the message that contains the network interface down command/
\r
301 * Only use the FreeRTOS_NetworkDownFromISR() version if the function is to be
\r
302 * called from an interrupt service routine. If FreeRTOS_NetworkDownFromISR()
\r
303 * returns a non-zero value then a context switch should be performed ebfore
\r
304 * the interrupt is exited.
\r
306 void FreeRTOS_NetworkDown( void );
\r
307 portBASE_TYPE FreeRTOS_NetworkDownFromISR( void );
\r
310 * Inspect an Ethernet frame to see if it contains data that the stack needs to
\r
311 * process. eProcessBuffer is returned if the frame should be processed by the
\r
312 * stack. eReleaseBuffer is returned if the frame should be discarded.
\r
314 eFrameProcessingResult_t eConsiderFrameForProcessing( const uint8_t * const pucEthernetBuffer );
\r
316 #if( ipconfigINCLUDE_TEST_CODE == 1 )
\r
317 unsigned portBASE_TYPE uxGetNumberOfFreeNetworkBuffers( void );
\r
318 #endif /* ipconfigINCLUDE_TEST_CODE */
\r
320 /* Socket related private functions. */
\r
321 portBASE_TYPE xProcessReceivedUDPPacket( xNetworkBufferDescriptor_t *pxNetworkBuffer, uint16_t usPort );
\r
322 void FreeRTOS_SocketsInit( void );
\r
324 /* If FreeRTOS+NABTO is included then include the prototype of the function that
\r
325 creates the Nabto task. */
\r
326 #if( ipconfigFREERTOS_PLUS_NABTO == 1 )
\r
327 void vStartNabtoTask( void );
\r
331 #endif /* FREERTOS_IP_PRIVATE_H */
\r