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ネットワーク機器の中の OCaml
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Masayuki Mizuno
January 25, 2024
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ネットワーク機器の中の OCaml
第五回関数型プログラミング(仮)の会発表スライド
Masayuki Mizuno
January 25, 2024
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Transcript
© 2023 Wantedly, Inc. ωοτϫʔΫػثͷதͷ OCaml Jan. 26 2023 -
Masayuki Mizuno (@fetburner)
ࠓ͢͜ͱ © 2023 Wantedly, Inc.
ࠓ͢͜ͱ ؔܕݴޠ OCaml ͕ΘΕ͍ͯΔ OSS ͷհ • ωοτϫʔΫ OS VyOS
VyOS ͰͲͷΑ͏ʹ OCaml ͕ΘΕ͍ͯΔ͔ • ઃఆϑΝΠϧͷॲཧܥ • ͷόϦσʔλ © 2023 Wantedly, Inc. VyOS झຯͰ͍ͬͯΔ͚ͩͰɺۀͷग़͖ͯ·ͤΜ
VyOS ͱ © 2023 Wantedly, Inc.
VyOS ͱ ΦʔϓϯιʔεͷωοτϫʔΫ OS • Debian ϕʔε • Vyatta ແঈ൛ͷϑΥʔΫ
• ϕΞϝλϧ্͚ͩͰͳ͘ɺԾԽج൫Ϋϥυ্Ͱͷಈ࡞αϙʔτ ۀ༻ϧʔλ૬ͷػೳΛඋ͑Δ • OSPFɺBGP4+ ͷϧʔςΟϯάϓϩτίϧ • IPsecɺSSL ʹجͮ͘ VPN ػೳ • VRF-lite ʹΑΔϧʔλԾԽ © 2023 Wantedly, Inc.
VyOS ͷ༻ײ JUNOS ϥΠΫͳ CUI ͰઃఆͰ͖Δ • ϧʔςΟϯάϓϩτίϧ VPNɺՌͯίϯςφ·Ͱ୯ҰͷઃఆϑΝΠϧͰཧ ©
2023 Wantedly, Inc.
OCaml ͕ͲͷΑ͏ʹΘΕ͍ͯΔ͔ © 2023 Wantedly, Inc.
എܠ: VyOS ͷΞʔΩςΫνϟ Linux ͷػߏ OSS ΛΈ߹ΘͤͯछʑͷػೳΛఏڙ • VyOS ͷઃఆϑΝΠϧΛ֤छιϑτͷͦΕʹม
© 2023 Wantedly, Inc. vyconf FRR strongSwan iptables … ݸผͷઃఆϑΝΠϧ VyOS ͷઃఆϑΝΠϧ
ͲͷΑ͏ʹ OCaml ͕ΘΕ͍ͯΔ͔ ઃఆϑΝΠϧͷॲཧܥ • ߏจղੳ AST ͷૢ࡞ͷͨΊͷϥΠϒϥϦ࣮ʹΘΕ͍ͯΔ • ࣮ࡍͷίʔυੜ
OCaml Ͱॻ͔ΕͨϥΠϒϥϦΛͬͯ Python Ͱ࣮ ઃఆͷόϦσʔλ • ೖྗ͕ਖ਼͍͠ IPv6 ΞυϨεʹͳ͍ͬͯΔ͔ • ߴԽͷͨΊʹݩʑ Python Ͱॻ͔Ε͍ͯͨόϦσʔλΛஔ͖͍͑ͯΔ © 2023 Wantedly, Inc.
OCaml Ͱॻ͔ΕͨίʔυΛಡΉ (1/2) © 2023 Wantedly, Inc. ϰΝϦΞϯτΛ׆༻ͯ͠ AST ͕ఆٛ͞Ε͍ͯΔ
https://github.com/vyos/vyconf/blob/dd9271b4304c6b1a5a2576821d1b2b8fd3aa6bf5/src/ vytree.ml#L1-L7
OCaml Ͱॻ͔ΕͨίʔυΛಡΉ (2/2) © 2023 Wantedly, Inc. ύλʔϯϚονΛͬͯ AST ͷૢ࡞͕࣮͞Ε͍ͯΔ
https://github.com/vyos/vyconf/blob/dd9271b4304c6b1a5a2576821d1b2b8fd3aa6bf5/src/ vytree.ml#L22-L30
·ͱΊ © 2023 Wantedly, Inc.
·ͱΊ ωοτϫʔΫ OS ͷ VyOS Ͱ OCaml ͕ΘΕ͍ͯΔ • ઃఆϑΝΠϧͷॲཧܥ
• ֤छͷόϦσʔλ ҙ֎ͳॴʹؔܕݴޠͷً͚Δ໘͕͋Δ • ϰΝϦΞϯτύλʔϯϚονͷԸܙͰݴޠॲཧܥΛ؆୯ʹ࣮Ͱ͖Δͷ͕ڧ͍ • DSL ؚΊΕɺݴޠॲཧܥͷԠ༻ൣғ͍ © 2023 Wantedly, Inc.