Editing SNMP MIB Implementation
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==Steps== | ==Steps== | ||
+ | # Create a Microchip Custom MIB script '''snmp.mib''' (an ASCII text file) for the tree structure. | ||
# Create a ASN.1 MIB script '''foo.mib''' (an ASCII text file) for the tree structure. | # Create a ASN.1 MIB script '''foo.mib''' (an ASCII text file) for the tree structure. | ||
# Convert foo.mib to binary file using '''mib2bin''' | # Convert foo.mib to binary file using '''mib2bin''' | ||
− | # Build [http://www.rane.com/note161.html | + | # Build [http://www.rane.com/note161.html snmp's PDU use BER (Base encoding rules)] encoder and decoder library to process data that's transfer between NMS and agents. |
− | # Build | + | # Build snmp API use [http://www.sics.se/~adam/uip/index.php/Main_Page uIP-stack] to communicate between NMS and Agents (open two ports: The manager speak to agents on one port, the agent responds manager on the other port). |
# Build binary MIB file reader library. | # Build binary MIB file reader library. | ||
# Build functions service oid tree. | # Build functions service oid tree. | ||
# Merge MIB ANS.1 file to NMS. | # Merge MIB ANS.1 file to NMS. | ||
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+ | ==Create Microchip Custom MIB Script== | ||
+ | * <font color=red>Any tutorial to create this file?</font> | ||
==Create ASN.1 MIB Script== | ==Create ASN.1 MIB Script== | ||
* Build MIB file's written in [http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf ANS.1 notation]. | * Build MIB file's written in [http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf ANS.1 notation]. | ||
− | * | + | * <font color=red>Any tutorial to create this file?</font> |
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===Abstract Syntax Notation=== | ===Abstract Syntax Notation=== | ||
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==Convert MIB to Binary File== | ==Convert MIB to Binary File== | ||
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MIB compiler tools: '''mib2bin''' | MIB compiler tools: '''mib2bin''' | ||
− | [http://www.modtronix.com/products/sbc44ec/00870a.pdf | + | [http://www.modtronix.com/products/sbc44ec/00870a.pdf mchip.mib] (ANS.1 format) -----------------------------------> foo.bin + foo.h + foo_data.h |
+ | |||
+ | * mib2bin tool is modified from [http://net-snmp.sourceforge.net/ net-snmp] to convert ASN.1 format file to three files: | ||
+ | ** Binary file ('''foo.bin''') storing information of OID tree. This file can be placed on an SD media card to be read by the FAT16 file system. | ||
+ | ** C header file ('''foo_data_h''') storing information of OID tree. This file is generated by converting mchip.bin file to the C header file. It's only used when a system don't have system file and place on program memory. | ||
+ | ** C header file ('''foo.h''') storing ID that's reference to function service of OID. | ||
+ | ===How to use=== | ||
* Syntax to use mib2bin tool: | * Syntax to use mib2bin tool: | ||
'''mib2bin <MIBfile>... | '''mib2bin <MIBfile>... | ||
− | + | where: | |
− | * | + | MIBfile file is ASN.1 format file. MIBfile = <name>.<type> |
− | ** | + | * mib2bin tool will create three files: |
− | ** | + | ** <name>.bin is the binary file. |
− | ** | + | ** <name>_data.h is C header file store OID tree. |
+ | ** <name>.h is C header file. (The file store Ids). | ||
* Note: | * Note: | ||
** Subfolder '''mibs''' containing the basics MIB files (e.g.: RFC1155-SMI, RFC1213-MIB, RFC-1215, SNMPv2-MIB ... for us MIB file), must be present under the directory of execution. | ** Subfolder '''mibs''' containing the basics MIB files (e.g.: RFC1155-SMI, RFC1213-MIB, RFC-1215, SNMPv2-MIB ... for us MIB file), must be present under the directory of execution. | ||
− | ** If the | + | ** If the three files exist, mib2bin tool will overwrite the files. |
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* Example: | * Example: | ||
− | + | mib2bin mchip.txt | |
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− | + | mib2bin will generate three files: mchip.bin, mchip_data.h and mchip.h | |
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