mirror of https://github.com/deavminet/dnetd.git
26 lines
1.3 KiB
Markdown
26 lines
1.3 KiB
Markdown
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Meyer link protocol
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===================
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This document describes the Meyer linking protocol which is used to maintain server links in the dnet network and deliver data across the links.
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## Protocol
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Every server maintains a list of connections (server, clients and unspec), this is the `DConnection[]` array. What we are concerned with here is the subset of that array which has `ConnectionType.SERVER` (so all servers).
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We also maintain a list of all servers that we know of via links, this is called `sl` and normally written in the notation of `sl=[]`. Some of these elements will be servers in `DConnection[]` (direct) however not all will be (indirect).
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### Link request
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A link request is when Server B makes a request to Server A to link up (`Server B -> Server A`) then the following happens.
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Server A checks its `sl=[]` and checks if the announced server name by Server B is in it, if so it closes the request as they must be linked already directly or indirectly.
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However, if not then it will add `B` to its `sl=[]`, so now it is `sl=[B]`. Another thing to note is when Server B makes the request (regardless of if it will go through or not), it will
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WHen a server wants to link with another it sends a lin request containing:
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1. it's server name
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2. a list of the links it has (direct and indirect)
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The receiving server checks first of all if
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