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# Unreliable Multicast Inter-ORB Protocol (MIOP)
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MIOP provides a common way to deliver GIOP request and fragment messages via multicast over UDP/IP. MIOP is implemented by some ORBs like TAO, TIDorb, JacORB, etc.
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## History
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TODO
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## Protocol dependencies
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- [UDP](/UDP): MIOP is over [UDP](/UDP)
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- [GIOP](/GIOP): [MIOP](/MIOP) encapsulates [GIOP](/GIOP) protocol over [UDP](/UDP)
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## Example traffic
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![Wireshark\_miop.png](uploads/__moin_import__/attachments/MIOP/Wireshark_miop.png "Wireshark_miop.png")
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## Wireshark
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The MIOP dissector is partially functional. It can show all information about MIOP packet header fields and it groups all MIOP packets into a MIOP collection. Also it can show the subsequent GIOP details for the first MIOP packet of a MIOP packet collection. The MIOP dissector listen in any UDP port .
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## Preference Settings
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There are no preference settings so far.
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## Example capture file
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- <https://bugs.wireshark.org/bugzilla/attachment.cgi?id=2735> MIOP sample file
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## External links
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- [MIOP](http://www.omg.org/cgi-bin/apps/doc?ptc/03-01-11.pdf) *MIOP* - OMG MIOP specification
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- [MIOP patch](https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3238) - Latest MIOP dissector patch for Wireshark
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- <https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3238>
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## Discussion
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---
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Imported from https://wiki.wireshark.org/MIOP on 2020-08-11 23:16:46 UTC |