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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 363 | johboh | 1 | /********************************************************************* |
| 2 | * |
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| 3 | * NetBIOS Name Service (NBNS) Server |
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| 4 | * -Responds to NBNS name requests to allow human name assignment |
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| 5 | * to the board |
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| 6 | * |
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| 7 | ********************************************************************* |
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| 8 | * FileName: NBNS.c |
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| 9 | * Dependencies: UDP, ARP, Tick |
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| 10 | * Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F |
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| 11 | * Complier: Microchip C18 v3.02 or higher |
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| 12 | * Microchip C30 v2.01 or higher |
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| 13 | * Company: Microchip Technology, Inc. |
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| 14 | * |
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| 15 | * Software License Agreement |
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| 16 | * |
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| 17 | * This software is owned by Microchip Technology Inc. ("Microchip") |
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| 18 | * and is supplied to you for use exclusively as described in the |
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| 19 | * associated software agreement. This software is protected by |
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| 20 | * software and other intellectual property laws. Any use in |
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| 21 | * violation of the software license may subject the user to criminal |
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| 22 | * sanctions as well as civil liability. Copyright 2006 Microchip |
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| 23 | * Technology Inc. All rights reserved. |
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| 24 | * |
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| 25 | * This software is provided "AS IS." MICROCHIP DISCLAIMS ALL |
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| 26 | * WARRANTIES, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, NOT LIMITED |
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| 27 | * TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND |
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| 28 | * INFRINGEMENT. Microchip shall in no event be liable for special, |
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| 29 | * incidental, or consequential damages. |
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| 30 | * |
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| 31 | * |
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| 32 | * Author Date Comment |
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| 33 | *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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| 34 | * Howard Schlunder 8/01/06 Original |
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| 35 | ********************************************************************/ |
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| 36 | #define THIS_IS_NET_BIOS_NAME_SERVICE |
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| 37 | |||
| 38 | #include "..\Include\Compiler.h" |
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| 39 | #include "..\Include\StackTsk.h" |
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| 40 | #include "..\Include\UDP.h" |
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| 41 | #include "..\Include\Tick.h" |
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| 42 | #include "..\Include\Helpers.h" |
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| 43 | |||
| 44 | #if defined(STACK_USE_NBNS) |
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| 45 | |||
| 46 | #define NBNS_PORT (137u) |
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| 47 | |||
| 48 | typedef struct _NBNS_HEADER |
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| 49 | { |
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| 50 | WORD_VAL TransactionID; |
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| 51 | WORD_VAL Flags; |
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| 52 | WORD_VAL Questions; |
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| 53 | WORD_VAL Answers; |
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| 54 | WORD_VAL AuthoritativeRecords; |
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| 55 | WORD_VAL AdditionalRecords; |
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| 56 | } NBNS_HEADER; |
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| 57 | |||
| 58 | static void NBNSPutName(BYTE *String); |
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| 59 | static void NBNSGetName(BYTE *String); |
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| 60 | |||
| 61 | |||
| 62 | /********************************************************************* |
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| 63 | * Function: void NBNSTask(void) |
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| 64 | * |
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| 65 | * PreCondition: None |
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| 66 | * |
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| 67 | * Input: None |
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| 68 | * |
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| 69 | * Output: Sends responses to NetBIOS name requests |
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| 70 | * |
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| 71 | * Side Effects: None |
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| 72 | * |
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| 73 | * Overview: None |
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| 74 | * |
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| 75 | * Note: None |
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| 76 | ********************************************************************/ |
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| 77 | void NBNSTask(void) |
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| 78 | { |
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| 79 | static UDP_SOCKET MySocket; |
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| 80 | BYTE i; |
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| 81 | WORD_VAL Type, Class; |
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| 82 | NBNS_HEADER NBNSHeader; |
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| 83 | BYTE NameString[16]; |
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| 84 | static enum |
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| 85 | { |
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| 86 | NBNS_HOME = 0, |
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| 87 | NBNS_OPEN_SOCKET, |
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| 88 | NBNS_LISTEN |
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| 89 | } smNBNS = NBNS_HOME; |
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| 90 | |||
| 91 | switch(smNBNS) |
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| 92 | { |
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| 93 | case NBNS_HOME: |
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| 94 | smNBNS++; |
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| 95 | break; |
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| 96 | |||
| 97 | case NBNS_OPEN_SOCKET: |
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| 98 | MySocket = UDPOpen(NBNS_PORT, NULL, NBNS_PORT); |
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| 99 | if(MySocket == INVALID_UDP_SOCKET) |
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| 100 | break; |
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| 101 | |||
| 102 | smNBNS++; |
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| 103 | |||
| 104 | case NBNS_LISTEN: |
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| 105 | if(!UDPIsGetReady(MySocket)) |
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| 106 | break; |
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| 107 | |||
| 108 | // Retrieve the NBNS header and de-big-endian it |
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| 109 | UDPGet(&NBNSHeader.TransactionID.v[1]); |
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| 110 | UDPGet(&NBNSHeader.TransactionID.v[0]); |
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| 111 | UDPGet(&NBNSHeader.Flags.v[1]); |
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| 112 | UDPGet(&NBNSHeader.Flags.v[0]); |
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| 113 | UDPGet(&NBNSHeader.Questions.v[1]); |
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| 114 | UDPGet(&NBNSHeader.Questions.v[0]); |
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| 115 | UDPGet(&NBNSHeader.Answers.v[1]); |
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| 116 | UDPGet(&NBNSHeader.Answers.v[0]); |
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| 117 | UDPGet(&NBNSHeader.AuthoritativeRecords.v[1]); |
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| 118 | UDPGet(&NBNSHeader.AuthoritativeRecords.v[0]); |
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| 119 | UDPGet(&NBNSHeader.AdditionalRecords.v[1]); |
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| 120 | UDPGet(&NBNSHeader.AdditionalRecords.v[0]); |
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| 121 | |||
| 122 | // Remove all questions |
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| 123 | while(NBNSHeader.Questions.Val--) |
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| 124 | { |
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| 125 | NBNSGetName(NameString); |
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| 126 | UDPGet(&i); // <??> Trailing character on string |
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| 127 | UDPGet(&Type.v[1]); // Question type |
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| 128 | UDPGet(&Type.v[0]); |
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| 129 | UDPGet(&Class.v[1]); // Question class |
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| 130 | UDPGet(&Class.v[0]); |
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| 131 | |||
| 132 | if(Type.Val == 0x0020 && Class.Val == 0x0001 && strcmp(NameString, AppConfig.NetBIOSName) == 0) |
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| 133 | { |
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| 134 | while(!UDPIsPutReady(MySocket)); |
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| 135 | |||
| 136 | NBNSHeader.Flags.Val = 0x8400; |
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| 137 | |||
| 138 | UDPPut(NBNSHeader.TransactionID.v[1]); |
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| 139 | UDPPut(NBNSHeader.TransactionID.v[0]); |
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| 140 | UDPPut(NBNSHeader.Flags.v[1]); |
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| 141 | UDPPut(NBNSHeader.Flags.v[0]); |
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| 142 | UDPPut(0x00); // 0x0000 Questions |
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| 143 | UDPPut(0x00); |
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| 144 | UDPPut(0x00); // 0x0001 Answers |
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| 145 | UDPPut(0x01); |
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| 146 | UDPPut(0x00); // 0x0000 Athoritative records |
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| 147 | UDPPut(0x00); |
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| 148 | UDPPut(0x00); // 0x0000 Additional records |
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| 149 | UDPPut(0x00); |
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| 150 | |||
| 151 | NBNSPutName(AppConfig.NetBIOSName); |
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| 152 | UDPPut(0x00); // 0x0020 Type: NetBIOS |
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| 153 | UDPPut(0x20); |
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| 154 | UDPPut(0x00); // 0x0001 Class: Internet |
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| 155 | UDPPut(0x01); |
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| 156 | UDPPut(0x00); // 0x00000000 Time To Live |
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| 157 | UDPPut(0x00); |
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| 158 | UDPPut(0x00); |
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| 159 | UDPPut(0x00); |
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| 160 | |||
| 161 | UDPPut(0x00); // 0x0006 Data length |
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| 162 | UDPPut(0x06); |
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| 163 | UDPPut(0x60); // 0x6000 Flags: H-node, Unique |
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| 164 | UDPPut(0x00); |
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| 165 | UDPPut(AppConfig.MyIPAddr.v[0]); // Put out IP address |
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| 166 | UDPPut(AppConfig.MyIPAddr.v[1]); |
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| 167 | UDPPut(AppConfig.MyIPAddr.v[2]); |
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| 168 | UDPPut(AppConfig.MyIPAddr.v[3]); |
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| 169 | |||
| 170 | UDPFlush(); |
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| 171 | } |
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| 172 | |||
| 173 | } |
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| 174 | |||
| 175 | UDPDiscard(); |
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| 176 | |||
| 177 | break; |
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| 178 | } |
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| 179 | } |
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| 180 | |||
| 181 | static void NBNSPutName(BYTE *String) |
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| 182 | { |
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| 183 | BYTE i, j; |
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| 184 | |||
| 185 | UDPPut(32); // NetBIOS names are always 32 bytes long (16 decoded bytes) |
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| 186 | for(i = 0; i < 16; i++) |
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| 187 | { |
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| 188 | j = *String++; |
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| 189 | UDPPut((j>>4) + 'A'); |
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| 190 | UDPPut((j & 0x0F) + 'A'); |
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| 191 | } |
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| 192 | |||
| 193 | UDPPut(0x00); |
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| 194 | } |
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| 195 | |||
| 196 | static void NBNSGetName(BYTE *String) |
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| 197 | { |
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| 198 | BYTE i, j, k; |
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| 199 | |||
| 200 | if(String == NULL) |
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| 201 | { |
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| 202 | UDPGet(&i); |
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| 203 | while(i--) |
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| 204 | { |
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| 205 | UDPGet(&j); |
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| 206 | } |
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| 207 | } |
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| 208 | else |
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| 209 | { |
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| 210 | UDPGet(&i); |
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| 211 | while(i--) |
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| 212 | { |
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| 213 | UDPGet(&j); |
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| 214 | j -= 'A'; |
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| 215 | k = j<<4; |
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| 216 | i--; |
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| 217 | UDPGet(&j); |
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| 218 | j -= 'A'; |
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| 219 | *String++ = k | j; |
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| 220 | } |
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| 221 | } |
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| 222 | } |
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| 223 | |||
| 224 | |||
| 225 | #endif //#if defined(STACK_USE_NBNS) |