2 * FreeRTOS+TCP V2.0.1
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3 * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * http://www.FreeRTOS.org
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23 * http://aws.amazon.com/freertos
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25 * 1 tab == 4 spaces!
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28 #ifndef FREERTOS_DNS_H
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29 #define FREERTOS_DNS_H
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35 /* Application level configuration options. */
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36 #include "FreeRTOSIPConfig.h"
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37 #include "IPTraceMacroDefaults.h"
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40 /* The Link-local Multicast Name Resolution (LLMNR)
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42 * Note that a special MAC address is required in addition to the NIC's actual
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43 * MAC address: 01:00:5E:00:00:FC
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45 * The target IP address will be 224.0.0.252
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47 #if( ipconfigBYTE_ORDER == pdFREERTOS_BIG_ENDIAN )
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48 #define ipLLMNR_IP_ADDR 0xE00000FC
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50 #define ipLLMNR_IP_ADDR 0xFC0000E0
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51 #endif /* ipconfigBYTE_ORDER == pdFREERTOS_BIG_ENDIAN */
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53 #define ipLLMNR_PORT 5355 /* Standard LLMNR port. */
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54 #define ipDNS_PORT 53 /* Standard DNS port. */
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55 #define ipDHCP_CLIENT 67
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56 #define ipDHCP_SERVER 68
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57 #define ipNBNS_PORT 137 /* NetBIOS Name Service. */
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58 #define ipNBDGM_PORT 138 /* Datagram Service, not included. */
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61 * The following function should be provided by the user and return true if it
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62 * matches the domain name.
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64 extern BaseType_t xApplicationDNSQueryHook( const char *pcName );
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67 * LLMNR is very similar to DNS, so is handled by the DNS routines.
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69 uint32_t ulDNSHandlePacket( NetworkBufferDescriptor_t *pxNetworkBuffer );
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71 #if( ipconfigUSE_LLMNR == 1 )
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72 extern const MACAddress_t xLLMNR_MacAdress;
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73 #endif /* ipconfigUSE_LLMNR */
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75 #if( ipconfigUSE_NBNS != 0 )
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78 * Inspect a NetBIOS Names-Service message. If the name matches with ours
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79 * (xApplicationDNSQueryHook returns true) an answer will be sent back.
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80 * Note that LLMNR is a better protocol for name services on a LAN as it is
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83 uint32_t ulNBNSHandlePacket (NetworkBufferDescriptor_t *pxNetworkBuffer );
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85 #endif /* ipconfigUSE_NBNS */
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87 #if( ipconfigUSE_DNS_CACHE != 0 )
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89 uint32_t FreeRTOS_dnslookup( const char *pcHostName );
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91 #endif /* ipconfigUSE_DNS_CACHE != 0 */
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93 #if( ipconfigDNS_USE_CALLBACKS != 0 )
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96 * Users may define this type of function as a callback.
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97 * It will be called when a DNS reply is received or when a timeout has been reached.
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99 typedef void (* FOnDNSEvent ) ( const char * /* pcName */, void * /* pvSearchID */, uint32_t /* ulIPAddress */ );
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102 * Asynchronous version of gethostbyname()
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103 * xTimeout is in units of ms.
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105 uint32_t FreeRTOS_gethostbyname_a( const char *pcHostName, FOnDNSEvent pCallback, void *pvSearchID, TickType_t xTimeout );
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106 void FreeRTOS_gethostbyname_cancel( void *pvSearchID );
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111 * FULL, UP-TO-DATE AND MAINTAINED REFERENCE DOCUMENTATION FOR ALL THESE
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112 * FUNCTIONS IS AVAILABLE ON THE FOLLOWING URL:
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115 uint32_t FreeRTOS_gethostbyname( const char *pcHostName );
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122 #endif /* FREERTOS_DNS_H */
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