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This should ensure that we have enough shortly after startup for initial path builds. The spread speed here gets slightly increased to lifetime/5 (=4min) instead of lifetime/4 (=5min) so that our "normal" number of paths is 5 with occassional momentary drops to 4, but should always keep us >= the new minimum of 4. Because the path spread happens over time, this shouldn't result in a rebuild of several paths: we'll build 4 quickly, then another at +4m, another at +8m, etc. When the initial 4 expire, we'll be dropping from 9 to 5 established but that's still above the minimum (4) so we won't need to reconnect to several at once, and the spread builds should keep us at 5 all the time.
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
#ifndef LLARP_CONSTANTS_PATH_HPP
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#define LLARP_CONSTANTS_PATH_HPP
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#include <chrono>
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#include <cstddef>
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#include <util/types.hpp>
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#include <util/time.hpp>
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namespace llarp
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{
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namespace path
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{
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/// maximum path length
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constexpr std::size_t max_len = 8;
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/// default path length
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constexpr std::size_t default_len = 4;
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/// pad messages to the nearest this many bytes
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constexpr std::size_t pad_size = 128;
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/// default path lifetime in ms
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static constexpr std::chrono::milliseconds default_lifetime = 20min;
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/// minimum into lifetime we will advertise
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static constexpr std::chrono::milliseconds min_intro_lifetime =
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default_lifetime / 2;
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/// spacing frequency at which we try to build paths for introductions
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static constexpr std::chrono::milliseconds intro_path_spread =
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default_lifetime / 5;
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/// Minimum paths to keep around for intros; mainly used at startup (the
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/// spread, above, should be able to maintain more than this number of paths
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/// normally once things are going).
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constexpr std::size_t min_intro_paths = 4;
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/// after this many ms a path build times out
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static constexpr auto build_timeout = 30s;
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/// measure latency every this interval ms
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static constexpr auto latency_interval = 5s;
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/// if a path is inactive for this amount of time it's dead
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static constexpr auto alive_timeout = 30s;
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} // namespace path
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} // namespace llarp
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#endif
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