Node / reticulum_mirror / MeshChatX / files / meshchatx / src / backend / path_utils.py

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T8b949e# SPDX-License-Identifier: 0BSD

Tff7b72import T7ee787RNS

T8b949e# One path-request packet is about 234 bytes plus IFAC. 240 covers that.

Te6edf3PATH_EXCHANGE_BYTES Tff7b72= T79c0ff240

Te6edf3LINK_ESTABLISHMENT_MARGIN_S Tff7b72= T79c0ff5.0

Te6edf3_FALLBACK_PATH_TIMEOUT_S Tff7b72= T79c0ff15.0

Tff7b72def Td2a8ffmin_window_bitrateTb4b4b4(Tb4b4b4) Tff7b72-Tff7b72> Tffa657floatTb4b4b4:

Tff7b72tryTb4b4b4:

Te6edf3value Tff7b72= Tffa657floatTb4b4b4(Te6edf3RNSTff7b72.Td2a8ffReticulumTff7b72.Td2a8ffMINIMUM_BITRATETb4b4b4)

Tff7b72if Te6edf3value Tff7b72> T79c0ff0Tb4b4b4:

Tff7b72return Te6edf3value

Tff7b72except Tf85149ExceptionTb4b4b4:

Tff7b72pass

Tff7b72return T79c0ff5.0

T8b949e# Kept as a name for tests and callers. Equals RNS.Reticulum.MINIMUM_BITRATE (5).

Te6edf3MIN_WINDOW_BITRATE Tff7b72= Te6edf3min_window_bitrateTb4b4b4(Tb4b4b4)

Tff7b72def Td2a8ffslowest_online_bitrateTb4b4b4(Te6edf3reticulumTff7b72=Tff7b72NoneTb4b4b4)Tb4b4b4:

Tff7b72tryTb4b4b4:

Tff7b72if Te6edf3reticulum Tff7b72is Tff7b72NoneTb4b4b4:

Te6edf3reticulum Tff7b72= Te6edf3RNSTff7b72.Td2a8ffReticulumTff7b72.Td2a8ffget_instanceTb4b4b4(Tb4b4b4)

Te6edf3stats Tff7b72= Te6edf3reticulumTff7b72.Td2a8ffget_interface_statsTb4b4b4(Tb4b4b4)

Te6edf3bitrates Tff7b72= Tb4b4b4[

Te6edf3iTb4b4b4[Ta5d6ff"Ta5d6ffbitrateTa5d6ff"Tb4b4b4]

Tff7b72for Te6edf3i Tff7b72in Te6edf3statsTb4b4b4[Ta5d6ff"Ta5d6ffinterfacesTa5d6ff"Tb4b4b4]

Tff7b72if Te6edf3iTff7b72.Td2a8ffgetTb4b4b4(Ta5d6ff"Ta5d6ffstatusTa5d6ff"Tb4b4b4) Tff7b72and Te6edf3iTff7b72.Td2a8ffgetTb4b4b4(Ta5d6ff"Ta5d6ffbitrateTa5d6ff"Tb4b4b4)

Tb4b4b4]

Tff7b72if Te6edf3bitratesTb4b4b4:

Tff7b72return Tffa657minTb4b4b4(Te6edf3bitratesTb4b4b4)

Tff7b72except Tf85149ExceptionTb4b4b4:

Tff7b72pass

Tff7b72return Tff7b72None

Tff7b72def Td2a8ff_rns_path_request_timeoutTb4b4b4(Tb4b4b4) Tff7b72-Tff7b72> Tffa657floatTb4b4b4:

Tff7b72tryTb4b4b4:

Tff7b72return Tffa657floatTb4b4b4(Te6edf3RNSTff7b72.Td2a8ffTransportTff7b72.Td2a8ffPATH_REQUEST_TIMEOUTTb4b4b4)

Tff7b72except Tf85149ExceptionTb4b4b4:

Tff7b72return Te6edf3_FALLBACK_PATH_TIMEOUT_S

Tff7b72def Td2a8ffpath_response_windowTb4b4b4(Te6edf3destination_hashTb4b4b4, Te6edf3reticulumTff7b72=Tff7b72NoneTb4b4b4) Tff7b72-Tff7b72> Tffa657floatTb4b4b4:

T8b949e"""Seconds to wait for a cold path response on the slowest online interface.

Uses Reticulum.get_first_hop_timeout so a shared rnsd client sees the

instance interface timeouts, not the local socket timeout.

"""

Te6edf3window Tff7b72= T79c0ff0.0

Tff7b72tryTb4b4b4:

Tff7b72if Te6edf3reticulum Tff7b72is Tff7b72NoneTb4b4b4:

Te6edf3reticulum Tff7b72= Te6edf3RNSTff7b72.Td2a8ffReticulumTff7b72.Td2a8ffget_instanceTb4b4b4(Tb4b4b4)

Te6edf3window Tff7b72= Tffa657floatTb4b4b4(Te6edf3reticulumTff7b72.Td2a8ffget_first_hop_timeoutTb4b4b4(Te6edf3destination_hashTb4b4b4)Tb4b4b4)

Tff7b72except Tf85149ExceptionTb4b4b4:

Te6edf3window Tff7b72= T79c0ff0.0

Te6edf3bitrate Tff7b72= Te6edf3slowest_online_bitrateTb4b4b4(Te6edf3reticulumTb4b4b4)

Tff7b72if Te6edf3bitrateTb4b4b4:

Te6edf3floor_bps Tff7b72= Te6edf3min_window_bitrateTb4b4b4(Tb4b4b4)

Te6edf3window Tff7b72= Tffa657maxTb4b4b4(

Te6edf3windowTb4b4b4,

T79c0ff2 Tff7b72* Tb4b4b4(Te6edf3PATH_EXCHANGE_BYTES Tff7b72* T79c0ff8 Tff7b72/ Tffa657maxTb4b4b4(Tffa657floatTb4b4b4(Te6edf3bitrateTb4b4b4)Tb4b4b4, Te6edf3floor_bpsTb4b4b4)Tb4b4b4) Tff7b72+ T79c0ff10Tb4b4b4,

Tb4b4b4)

Tff7b72return Tffa657maxTb4b4b4(Te6edf3windowTb4b4b4, Te6edf3_rns_path_request_timeoutTb4b4b4(Tb4b4b4)Tb4b4b4)

Tff7b72def Td2a8fflink_establishment_windowTb4b4b4(

Te6edf3linkTb4b4b4,

Te6edf3destination_hashTff7b72=Tff7b72NoneTb4b4b4,

Te6edf3reticulumTff7b72=Tff7b72NoneTb4b4b4,

Tb4b4b4) Tff7b72-Tff7b72> Tffa657floatTb4b4b4:

T8b949e"""Seconds to wait for a new RNS Link, from link.establishment_timeout.

Adds LINK_ESTABLISHMENT_MARGIN_S. Falls back to path_response_window

when RNS did not report an establishment timeout.

"""

Te6edf3rns_timeout Tff7b72= Tffa657getattrTb4b4b4(Te6edf3linkTb4b4b4, Ta5d6ff"Ta5d6ffestablishment_timeoutTa5d6ff"Tb4b4b4, Tff7b72NoneTb4b4b4)

Tff7b72if Tffa657isinstanceTb4b4b4(Te6edf3rns_timeoutTb4b4b4, Tb4b4b4(Tffa657intTb4b4b4, Tffa657floatTb4b4b4)Tb4b4b4) Tff7b72and Te6edf3rns_timeout Tff7b72> T79c0ff0Tb4b4b4:

Tff7b72return Tffa657floatTb4b4b4(Te6edf3rns_timeoutTb4b4b4) Tff7b72+ Te6edf3LINK_ESTABLISHMENT_MARGIN_S

Tff7b72if Te6edf3destination_hash Tff7b72is Tff7b72not Tff7b72NoneTb4b4b4:

Tff7b72return Te6edf3path_response_windowTb4b4b4(Te6edf3destination_hashTb4b4b4, Te6edf3reticulumTb4b4b4)

Tff7b72return Te6edf3_rns_path_request_timeoutTb4b4b4(Tb4b4b4)