Add original hop limit to header to determine hops used - #3321
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…tastic#3321)" This reverts commit 585805c.
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) * Set `hop_start` in header to determine how many hops each packet traveled * Set hopLimit of response according to hops used by request * Identify neighbors based on `hopStart` and `hopLimit` * NeighborInfo: get all packets and assume a default broadcast interval * Add fail-safe in case node in between is running modified firmware * Add `viaMQTT` and `hopsAway` to NodeInfo * Replace `HOP_RELIABLE` with hopStart for repeated packet --------- Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
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This adds the original hop limit of a packet (
hopStart) to the unencrypted header using the three remaining bits such that we can derive with how many hops each packet was received. This will be saved in the NodeInfo ashopsAway. AlsoviaMQTTis now saved in the NodeInfo.Using this, we can adapt the
hopLimitof a response and real ACK to more or less hops if needed. This is implemented withRoutingModule::getHopLimitForResponse(). If the amount of hops used for the request was more than our setting, we use the amount of hops that was used for the request. When it used less than our setting, I chose a margin of 2 more hops for the response in case the path back is different.This also allows us to determine neighbors even if others don’t have the NeighborInfo Module enabled, which is implemented as well.
Closes #3239.