diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..079abd8
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,5 @@
+export RUST_LOG=debug # info, warn, error
+export RUST_BACKTRACE=1
+export PALSERVER_ADDR=127.0.0.1:25575 # same to RCONPort, change it to yours
+export PALSERVER_PASSWORD=adminPasswordHere # same to AdminPassword, change it to yours
+export GATEWAY_ADDR=127.0.0.1:8080 # both frontend and backend use this address
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..94bb8db
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,169 @@
+# Created by https://www.toptal.com/developers/gitignore/api/macos,visualstudiocode,intellij
+# Edit at https://www.toptal.com/developers/gitignore?templates=macos,visualstudiocode,intellij
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator-enh.xml
+.idea/**/markdown-navigator/
+
+# Cache file creation bug
+# See https://youtrack.jetbrains.com/issue/JBR-2257
+.idea/$CACHE_FILE$
+
+# CodeStream plugin
+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+# Azure Toolkit for IntelliJ plugin
+# https://plugins.jetbrains.com/plugin/8053-azure-toolkit-for-intellij
+.idea/**/azureSettings.xml
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/macos,visualstudiocode,intellij
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..bd11d88
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,557 @@
+                     Server Side Public License
+                     VERSION 1, OCTOBER 16, 2018
+
+                   Copyright © 2024 Shiroki Satsuki
+
+  Everyone is permitted to copy and distribute verbatim copies of this
+  license document, but changing it is not allowed.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+  
+  “This License” refers to Server Side Public License.
+
+  “Copyright” also means copyright-like laws that apply to other kinds of
+  works, such as semiconductor masks.
+
+  “The Program” refers to any copyrightable work licensed under this
+  License.  Each licensee is addressed as “you”. “Licensees” and
+  “recipients” may be individuals or organizations.
+
+  To “modify” a work means to copy from or adapt all or part of the work in
+  a fashion requiring copyright permission, other than the making of an
+  exact copy. The resulting work is called a “modified version” of the
+  earlier work or a work “based on” the earlier work.
+
+  A “covered work” means either the unmodified Program or a work based on
+  the Program.
+
+  To “propagate” a work means to do anything with it that, without
+  permission, would make you directly or secondarily liable for
+  infringement under applicable copyright law, except executing it on a
+  computer or modifying a private copy. Propagation includes copying,
+  distribution (with or without modification), making available to the
+  public, and in some countries other activities as well.
+
+  To “convey” a work means any kind of propagation that enables other
+  parties to make or receive copies. Mere interaction with a user through a
+  computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays “Appropriate Legal Notices” to the
+  extent that it includes a convenient and prominently visible feature that
+  (1) displays an appropriate copyright notice, and (2) tells the user that
+  there is no warranty for the work (except to the extent that warranties
+  are provided), that licensees may convey the work under this License, and
+  how to view a copy of this License. If the interface presents a list of
+  user commands or options, such as a menu, a prominent item in the list
+  meets this criterion.
+
+  1. Source Code.
+
+  The “source code” for a work means the preferred form of the work for
+  making modifications to it. “Object code” means any non-source form of a
+  work.
+
+  A “Standard Interface” means an interface that either is an official
+  standard defined by a recognized standards body, or, in the case of
+  interfaces specified for a particular programming language, one that is
+  widely used among developers working in that language.  The “System
+  Libraries” of an executable work include anything, other than the work as
+  a whole, that (a) is included in the normal form of packaging a Major
+  Component, but which is not part of that Major Component, and (b) serves
+  only to enable use of the work with that Major Component, or to implement
+  a Standard Interface for which an implementation is available to the
+  public in source code form. A “Major Component”, in this context, means a
+  major essential component (kernel, window system, and so on) of the
+  specific operating system (if any) on which the executable work runs, or
+  a compiler used to produce the work, or an object code interpreter used
+  to run it.
+
+  The “Corresponding Source” for a work in object code form means all the
+  source code needed to generate, install, and (for an executable work) run
+  the object code and to modify the work, including scripts to control
+  those activities. However, it does not include the work's System
+  Libraries, or general-purpose tools or generally available free programs
+  which are used unmodified in performing those activities but which are
+  not part of the work. For example, Corresponding Source includes
+  interface definition files associated with source files for the work, and
+  the source code for shared libraries and dynamically linked subprograms
+  that the work is specifically designed to require, such as by intimate
+  data communication or control flow between those subprograms and other
+  parts of the work.
+
+  The Corresponding Source need not include anything that users can
+  regenerate automatically from other parts of the Corresponding Source.
+
+  The Corresponding Source for a work in source code form is that same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+  copyright on the Program, and are irrevocable provided the stated
+  conditions are met. This License explicitly affirms your unlimited
+  permission to run the unmodified Program, subject to section 13. The
+  output from running a covered work is covered by this License only if the
+  output, given its content, constitutes a covered work. This License
+  acknowledges your rights of fair use or other equivalent, as provided by
+  copyright law.  Subject to section 13, you may make, run and propagate
+  covered works that you do not convey, without conditions so long as your
+  license otherwise remains in force. You may convey covered works to
+  others for the sole purpose of having them make modifications exclusively
+  for you, or provide you with facilities for running those works, provided
+  that you comply with the terms of this License in conveying all
+  material for which you do not control copyright. Those thus making or
+  running the covered works for you must do so exclusively on your
+  behalf, under your direction and control, on terms that prohibit them
+  from making any copies of your copyrighted material outside their
+  relationship with you.
+
+  Conveying under any other circumstances is permitted solely under the
+  conditions stated below. Sublicensing is not allowed; section 10 makes it
+  unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+  measure under any applicable law fulfilling obligations under article 11
+  of the WIPO copyright treaty adopted on 20 December 1996, or similar laws
+  prohibiting or restricting circumvention of such measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+  circumvention of technological measures to the extent such circumvention is
+  effected by exercising rights under this License with respect to the
+  covered work, and you disclaim any intention to limit operation or
+  modification of the work as a means of enforcing, against the work's users,
+  your or third parties' legal rights to forbid circumvention of
+  technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+  receive it, in any medium, provided that you conspicuously and
+  appropriately publish on each copy an appropriate copyright notice; keep
+  intact all notices stating that this License and any non-permissive terms
+  added in accord with section 7 apply to the code; keep intact all notices
+  of the absence of any warranty; and give all recipients a copy of this
+  License along with the Program.  You may charge any price or no price for
+  each copy that you convey, and you may offer support or warranty
+  protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+  produce it from the Program, in the form of source code under the terms
+  of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified it,
+    and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is released
+    under this License and any conditions added under section 7. This
+    requirement modifies the requirement in section 4 to “keep intact all
+    notices”.
+
+    c) You must license the entire work, as a whole, under this License to
+    anyone who comes into possession of a copy. This License will therefore
+    apply, along with any applicable section 7 additional terms, to the
+    whole of the work, and all its parts, regardless of how they are
+    packaged. This License gives no permission to license the work in any
+    other way, but it does not invalidate such permission if you have
+    separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your work
+    need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+  works, which are not by their nature extensions of the covered work, and
+  which are not combined with it such as to form a larger program, in or on
+  a volume of a storage or distribution medium, is called an “aggregate” if
+  the compilation and its resulting copyright are not used to limit the
+  access or legal rights of the compilation's users beyond what the
+  individual works permit. Inclusion of a covered work in an aggregate does
+  not cause this License to apply to the other parts of the aggregate.
+  
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms of
+  sections 4 and 5, provided that you also convey the machine-readable
+  Corresponding Source under the terms of this License, in one of these
+  ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium customarily
+    used for software interchange.
+   
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a written
+    offer, valid for at least three years and valid for as long as you
+    offer spare parts or customer support for that product model, to give
+    anyone who possesses the object code either (1) a copy of the
+    Corresponding Source for all the software in the product that is
+    covered by this License, on a durable physical medium customarily used
+    for software interchange, for a price no more than your reasonable cost
+    of physically performing this conveying of source, or (2) access to
+    copy the Corresponding Source from a network server at no charge.
+   
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source. This alternative is
+    allowed only occasionally and noncommercially, and only if you received
+    the object code with such an offer, in accord with subsection 6b.
+   
+    d) Convey the object code by offering access from a designated place
+    (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge. You need not require recipients to copy the
+    Corresponding Source along with the object code. If the place to copy
+    the object code is a network server, the Corresponding Source may be on
+    a different server (operated by you or a third party) that supports
+    equivalent copying facilities, provided you maintain clear directions
+    next to the object code saying where to find the Corresponding Source.
+    Regardless of what server hosts the Corresponding Source, you remain
+    obligated to ensure that it is available for as long as needed to
+    satisfy these requirements.
+   
+    e) Convey the object code using peer-to-peer transmission, provided you
+    inform other peers where the object code and Corresponding Source of
+    the work are being offered to the general public at no charge under
+    subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+  from the Corresponding Source as a System Library, need not be included
+  in conveying the object code work.
+
+  A “User Product” is either (1) a “consumer product”, which means any
+  tangible personal property which is normally used for personal, family,
+  or household purposes, or (2) anything designed or sold for incorporation
+  into a dwelling. In determining whether a product is a consumer product,
+  doubtful cases shall be resolved in favor of coverage. For a particular
+  product received by a particular user, “normally used” refers to a
+  typical or common use of that class of product, regardless of the status
+  of the particular user or of the way in which the particular user
+  actually uses, or expects or is expected to use, the product. A product
+  is a consumer product regardless of whether the product has substantial
+  commercial, industrial or non-consumer uses, unless such uses represent
+  the only significant mode of use of the product.
+
+  “Installation Information” for a User Product means any methods,
+  procedures, authorization keys, or other information required to install
+  and execute modified versions of a covered work in that User Product from
+  a modified version of its Corresponding Source. The information must
+  suffice to ensure that the continued functioning of the modified object
+  code is in no case prevented or interfered with solely because
+  modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+  specifically for use in, a User Product, and the conveying occurs as part
+  of a transaction in which the right of possession and use of the User
+  Product is transferred to the recipient in perpetuity or for a fixed term
+  (regardless of how the transaction is characterized), the Corresponding
+  Source conveyed under this section must be accompanied by the
+  Installation Information. But this requirement does not apply if neither
+  you nor any third party retains the ability to install modified object
+  code on the User Product (for example, the work has been installed in
+  ROM).
+
+  The requirement to provide Installation Information does not include a
+  requirement to continue to provide support service, warranty, or updates
+  for a work that has been modified or installed by the recipient, or for
+  the User Product in which it has been modified or installed. Access
+  to a network may be denied when the modification itself materially
+  and adversely affects the operation of the network or violates the
+  rules and protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided, in
+  accord with this section must be in a format that is publicly documented
+  (and with an implementation available to the public in source code form),
+  and must require no special password or key for unpacking, reading or
+  copying.
+
+  7. Additional Terms.
+
+  “Additional permissions” are terms that supplement the terms of this
+  License by making exceptions from one or more of its conditions.
+  Additional permissions that are applicable to the entire Program shall be
+  treated as though they were included in this License, to the extent that
+  they are valid under applicable law. If additional permissions apply only
+  to part of the Program, that part may be used separately under those
+  permissions, but the entire Program remains governed by this License
+  without regard to the additional permissions.  When you convey a copy of
+  a covered work, you may at your option remove any additional permissions
+  from that copy, or from any part of it. (Additional permissions may be
+  written to require their own removal in certain cases when you modify the
+  work.) You may place additional permissions on material, added by you to
+  a covered work, for which you have or can give appropriate copyright
+  permission.
+
+  Notwithstanding any other provision of this License, for material you add
+  to a covered work, you may (if authorized by the copyright holders of
+  that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some trade
+    names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that material
+    by anyone who conveys the material (or modified versions of it) with
+    contractual assumptions of liability to the recipient, for any
+    liability that these contractual assumptions directly impose on those
+    licensors and authors.
+
+  All other non-permissive additional terms are considered “further
+  restrictions” within the meaning of section 10. If the Program as you
+  received it, or any part of it, contains a notice stating that it is
+  governed by this License along with a term that is a further restriction,
+  you may remove that term. If a license document contains a further
+  restriction but permits relicensing or conveying under this License, you
+  may add to a covered work material governed by the terms of that license
+  document, provided that the further restriction does not survive such
+  relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you must
+  place, in the relevant source files, a statement of the additional terms
+  that apply to those files, or a notice indicating where to find the
+  applicable terms.  Additional terms, permissive or non-permissive, may be
+  stated in the form of a separately written license, or stated as
+  exceptions; the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+  provided under this License. Any attempt otherwise to propagate or modify
+  it is void, and will automatically terminate your rights under this
+  License (including any patent licenses granted under the third paragraph
+  of section 11).
+
+  However, if you cease all violation of this License, then your license
+  from a particular copyright holder is reinstated (a) provisionally,
+  unless and until the copyright holder explicitly and finally terminates
+  your license, and (b) permanently, if the copyright holder fails to
+  notify you of the violation by some reasonable means prior to 60 days
+  after the cessation.
+
+  Moreover, your license from a particular copyright holder is reinstated
+  permanently if the copyright holder notifies you of the violation by some
+  reasonable means, this is the first time you have received notice of
+  violation of this License (for any work) from that copyright holder, and
+  you cure the violation prior to 30 days after your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+  licenses of parties who have received copies or rights from you under
+  this License. If your rights have been terminated and not permanently
+  reinstated, you do not qualify to receive new licenses for the same
+  material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or run a
+  copy of the Program. Ancillary propagation of a covered work occurring
+  solely as a consequence of using peer-to-peer transmission to receive a
+  copy likewise does not require acceptance. However, nothing other than
+  this License grants you permission to propagate or modify any covered
+  work. These actions infringe copyright if you do not accept this License.
+  Therefore, by modifying or propagating a covered work, you indicate your
+  acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically receives
+  a license from the original licensors, to run, modify and propagate that
+  work, subject to this License. You are not responsible for enforcing
+  compliance by third parties with this License.
+
+  An “entity transaction” is a transaction transferring control of an
+  organization, or substantially all assets of one, or subdividing an
+  organization, or merging organizations. If propagation of a covered work
+  results from an entity transaction, each party to that transaction who
+  receives a copy of the work also receives whatever licenses to the work
+  the party's predecessor in interest had or could give under the previous
+  paragraph, plus a right to possession of the Corresponding Source of the
+  work from the predecessor in interest, if the predecessor has it or can
+  get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the rights
+  granted or affirmed under this License. For example, you may not impose a
+  license fee, royalty, or other charge for exercise of rights granted
+  under this License, and you may not initiate litigation (including a
+  cross-claim or counterclaim in a lawsuit) alleging that any patent claim
+  is infringed by making, using, selling, offering for sale, or importing
+  the Program or any portion of it.
+
+  11. Patents.
+
+  A “contributor” is a copyright holder who authorizes use under this
+  License of the Program or a work on which the Program is based. The work
+  thus licensed is called the contributor's “contributor version”.
+
+  A contributor's “essential patent claims” are all patent claims owned or
+  controlled by the contributor, whether already acquired or hereafter
+  acquired, that would be infringed by some manner, permitted by this
+  License, of making, using, or selling its contributor version, but do not
+  include claims that would be infringed only as a consequence of further
+  modification of the contributor version. For purposes of this definition,
+  “control” includes the right to grant patent sublicenses in a manner
+  consistent with the requirements of this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+  patent license under the contributor's essential patent claims, to make,
+  use, sell, offer for sale, import and otherwise run, modify and propagate
+  the contents of its contributor version.
+
+  In the following three paragraphs, a “patent license” is any express
+  agreement or commitment, however denominated, not to enforce a patent
+  (such as an express permission to practice a patent or covenant not to
+  sue for patent infringement). To “grant” such a patent license to a party
+  means to make such an agreement or commitment not to enforce a patent
+  against the party.
+
+  If you convey a covered work, knowingly relying on a patent license, and
+  the Corresponding Source of the work is not available for anyone to copy,
+  free of charge and under the terms of this License, through a publicly
+  available network server or other readily accessible means, then you must
+  either (1) cause the Corresponding Source to be so available, or (2)
+  arrange to deprive yourself of the benefit of the patent license for this
+  particular work, or (3) arrange, in a manner consistent with the
+  requirements of this License, to extend the patent license to downstream
+  recipients. “Knowingly relying” means you have actual knowledge that, but
+  for the patent license, your conveying the covered work in a country, or
+  your recipient's use of the covered work in a country, would infringe
+  one or more identifiable patents in that country that you have reason
+  to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+  arrangement, you convey, or propagate by procuring conveyance of, a
+  covered work, and grant a patent license to some of the parties receiving
+  the covered work authorizing them to use, propagate, modify or convey a
+  specific copy of the covered work, then the patent license you grant is
+  automatically extended to all recipients of the covered work and works
+  based on it.
+
+  A patent license is “discriminatory” if it does not include within the
+  scope of its coverage, prohibits the exercise of, or is conditioned on
+  the non-exercise of one or more of the rights that are specifically
+  granted under this License. You may not convey a covered work if you are
+  a party to an arrangement with a third party that is in the business of
+  distributing software, under which you make payment to the third party
+  based on the extent of your activity of conveying the work, and under
+  which the third party grants, to any of the parties who would receive the
+  covered work from you, a discriminatory patent license (a) in connection
+  with copies of the covered work conveyed by you (or copies made from
+  those copies), or (b) primarily for and in connection with specific
+  products or compilations that contain the covered work, unless you
+  entered into that arrangement, or that patent license was granted, prior
+  to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting any
+  implied license or other defenses to infringement that may otherwise be
+  available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+  otherwise) that contradict the conditions of this License, they do not
+  excuse you from the conditions of this License. If you cannot use,
+  propagate or convey a covered work so as to satisfy simultaneously your
+  obligations under this License and any other pertinent obligations, then
+  as a consequence you may not use, propagate or convey it at all. For
+  example, if you agree to terms that obligate you to collect a royalty for
+  further conveying from those to whom you convey the Program, the only way
+  you could satisfy both those terms and this License would be to refrain
+  entirely from conveying the Program.
+
+  13. Offering the Program as a Service.
+
+  If you make the functionality of the Program or a modified version
+  available to third parties as a service, you must make the Service Source
+  Code available via network download to everyone at no charge, under the
+  terms of this License. Making the functionality of the Program or
+  modified version available to third parties as a service includes,
+  without limitation, enabling third parties to interact with the
+  functionality of the Program or modified version remotely through a
+  computer network, offering a service the value of which entirely or
+  primarily derives from the value of the Program or modified version, or
+  offering a service that accomplishes for users the primary purpose of the
+  Program or modified version.
+
+  “Service Source Code” means the Corresponding Source for the Program or
+  the modified version, and the Corresponding Source for all programs that
+  you use to make the Program or modified version available as a service,
+  including, without limitation, management software, user interfaces,
+  application program interfaces, automation software, monitoring software,
+  backup software, storage software and hosting software, all such that a
+  user could run an instance of the service using the Service Source Code
+  you make available.  
+
+  14. Revised Versions of this License.
+
+  MongoDB, Inc. may publish revised and/or new versions of the Server Side
+  Public License from time to time. Such new versions will be similar in
+  spirit to the present version, but may differ in detail to address new
+  problems or concerns.
+
+  Each version is given a distinguishing version number. If the Program
+  specifies that a certain numbered version of the Server Side Public
+  License “or any later version” applies to it, you have the option of
+  following the terms and conditions either of that numbered version or of
+  any later version published by MongoDB, Inc. If the Program does not
+  specify a version number of the Server Side Public License, you may
+  choose any version ever published by MongoDB, Inc.
+
+  If the Program specifies that a proxy can decide which future versions of
+  the Server Side Public License can be used, that proxy's public statement
+  of acceptance of a version permanently authorizes you to choose that
+  version for the Program.
+
+  Later license versions may give you additional or different permissions.
+  However, no additional obligations are imposed on any author or copyright
+  holder as a result of your choosing to follow a later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+  APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+  HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY
+  OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+  PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+  IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+  ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+  
+  16. Limitation of Liability.
+  
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+  WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+  THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING
+  ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF
+  THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO
+  LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU
+  OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+  PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGES.
+  
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided above
+  cannot be given local legal effect according to their terms, reviewing
+  courts shall apply local law that most closely approximates an absolute
+  waiver of all civil liability in connection with the Program, unless a
+  warranty or assumption of liability accompanies a copy of the Program in
+  return for a fee.
+  
+                        END OF TERMS AND CONDITIONS
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5bf8701
--- /dev/null
+++ b/README.md
@@ -0,0 +1,63 @@
+# PalBoard
+
+A [Palworld](https://www.pocketpair.jp/palworld) dashboard, built with [Nuxt](https://nuxtjs.org/) and [Axum](https://github.com/tokio-rs/axum).
+
+![Screenshot of "Server Info"](./assets/server_info.webp)
+
+## Development
+
+You need to install [Node.js](https://nodejs.org/) and [Bun](https://bun.sh/) to build frontend and [Rust](https://www.rust-lang.org/learn/get-started) to build gateway. Other Node.js package managers (e.g. `npm`, `yarn`) won't utilize `bun.lockb` and the build result may be different, so no guarantee.
+
+```bash
+# Allow .envrc if you use direnv
+direnv allow
+# or manually set environment variables, see .envrc for details
+
+# Frontend
+cd frontend
+bun install
+bun dev
+
+# Gateway
+cd gateway
+RUST_LOG=debug cargo run
+```
+
+## Implemented Features
+
+![Screenshot of "Player List"](./assets/player_list.webp)
+
+### RCON Commands
+
+See description on <https://tech.palworldgame.com/server-commands>.
+
+Following table is corresponding to v0.1.2.0.
+
+| Command                             | Frontend | Gateway |
+| ----------------------------------- | -------- | ------- |
+| `/Shutdown {Seconds} {MessageText}` | 🚧       | ✔️      |
+| `/DoExit`                           | 🚧       | ✔️      |
+| `/Broadcast {MessageText}`          | 🚧       | ✔️      |
+| `/KickPlayer {SteamID}`             | 🚧       | ✔️      |
+| `/BanPlayer {SteamID}`              | 🚧       | ✔️      |
+| `/TeleportToPlayer {SteamID}`       | 🚫       | 🚫      |
+| `/TeleportToMe {SteamID}`           | 🚫       | 🚫      |
+| `/ShowPlayers`                      | ✔️       | ✔️      |
+| `/Info`                             | ✔️       | ✔️      |
+| `/Save`                             | 🚧       | ✔️      |
+
+Symbols: ✔️(Complete), 🚧 (Work in Progress), ❌ (Incomplete), 🚫 (Impossible)
+
+Teleport commands are not available because it needs player context. If further update allows teleporting players from RCON context, it would be implemented.
+
+### Docker API
+
+Unimplemented. Future plan.
+
+## License
+
+SSPL-1.0. In short, you can use, modify, and distribute the software freely under the same license. However, if you provide the software as a service to others (which is the case if you are running game servers as a service *commercially*), you must release the complete source code, including all necessary components, under the SSPL. Contact me for alternative licensing.
+
+## Disclaimer
+
+This project is not affiliated with Pocketpair, Inc.
diff --git a/assets/player_list.webp b/assets/player_list.webp
new file mode 100644
index 0000000..2509356
Binary files /dev/null and b/assets/player_list.webp differ
diff --git a/assets/server_info.webp b/assets/server_info.webp
new file mode 100644
index 0000000..18de1d5
Binary files /dev/null and b/assets/server_info.webp differ
diff --git a/frontend/.gitignore b/frontend/.gitignore
new file mode 100644
index 0000000..4a7f73a
--- /dev/null
+++ b/frontend/.gitignore
@@ -0,0 +1,24 @@
+# Nuxt dev/build outputs
+.output
+.data
+.nuxt
+.nitro
+.cache
+dist
+
+# Node dependencies
+node_modules
+
+# Logs
+logs
+*.log
+
+# Misc
+.DS_Store
+.fleet
+.idea
+
+# Local env files
+.env
+.env.*
+!.env.example
diff --git a/frontend/.prettierrc b/frontend/.prettierrc
new file mode 100644
index 0000000..222861c
--- /dev/null
+++ b/frontend/.prettierrc
@@ -0,0 +1,4 @@
+{
+  "tabWidth": 2,
+  "useTabs": false
+}
diff --git a/frontend/app.vue b/frontend/app.vue
new file mode 100644
index 0000000..f8eacfa
--- /dev/null
+++ b/frontend/app.vue
@@ -0,0 +1,5 @@
+<template>
+  <NuxtLayout>
+    <NuxtPage />
+  </NuxtLayout>
+</template>
diff --git a/frontend/bun.lockb b/frontend/bun.lockb
new file mode 100755
index 0000000..006006c
Binary files /dev/null and b/frontend/bun.lockb differ
diff --git a/frontend/components/SideNav.vue b/frontend/components/SideNav.vue
new file mode 100644
index 0000000..1efbcf3
--- /dev/null
+++ b/frontend/components/SideNav.vue
@@ -0,0 +1,19 @@
+<template>
+  <UVerticalNavigation class="" :links="[{
+  label: 'Home',
+  icon: 'i-heroicons-home',
+  to: '/'
+}, {
+  label: 'Server Info',
+  icon: 'i-heroicons-command-line',
+  to: '/info'
+}, {
+  label: 'Player List',
+  icon: 'i-heroicons-users',
+  to: '/players'
+}, {
+  label: 'Saves Management',
+  icon: 'i-heroicons-archive-box',
+  to: '/saves'
+}]" />
+</template>
diff --git a/frontend/interfaces/gateway.interface.ts b/frontend/interfaces/gateway.interface.ts
new file mode 100644
index 0000000..5f5af64
--- /dev/null
+++ b/frontend/interfaces/gateway.interface.ts
@@ -0,0 +1,5 @@
+type Player = {
+  name: string;
+  playeruid: string;
+  steamid: string; // this should be considered unique
+};
diff --git a/frontend/layouts/default.vue b/frontend/layouts/default.vue
new file mode 100644
index 0000000..9829daf
--- /dev/null
+++ b/frontend/layouts/default.vue
@@ -0,0 +1,8 @@
+<template>
+  <div class="w-screen h-screen flex p-4">
+    <SideNav />
+    <UContainer>
+      <slot />
+    </UContainer>
+  </div>
+</template>
diff --git a/frontend/nuxt.config.ts b/frontend/nuxt.config.ts
new file mode 100644
index 0000000..aa0814b
--- /dev/null
+++ b/frontend/nuxt.config.ts
@@ -0,0 +1,9 @@
+// https://nuxt.com/docs/api/configuration/nuxt-config
+export default defineNuxtConfig({
+  devtools: { enabled: true },
+  modules: ['@nuxt/ui', '@pinia/nuxt'],
+  routeRules: {
+    '/proxy/steamdb/**': { proxy: { to: "https://steamdb.info/api/**" } },
+    '/proxy/gateway/**': { proxy: { to: `http://${process.env.GATEWAY_ADDR ?? "127.0.0.1:8080"}/**` } },
+  }
+})
diff --git a/frontend/package.json b/frontend/package.json
new file mode 100644
index 0000000..14881f3
--- /dev/null
+++ b/frontend/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "@palboard/frontend",
+  "version": "0.1.0",
+  "license": "SSPL-1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "nuxt build",
+    "dev": "nuxt dev",
+    "generate": "nuxt generate",
+    "preview": "nuxt preview",
+    "postinstall": "nuxt prepare"
+  },
+  "devDependencies": {
+    "nuxt": "^3.9.3",
+    "vue": "^3.4.14",
+    "vue-router": "^4.2.5"
+  },
+  "dependencies": {
+    "@extractus/feed-extractor": "^7.0.9",
+    "@nuxt/ui": "^2.12.3",
+    "@pinia/nuxt": "^0.5.1",
+    "pinia": "^2.1.7"
+  }
+}
diff --git a/frontend/pages/index.vue b/frontend/pages/index.vue
new file mode 100644
index 0000000..1ae880a
--- /dev/null
+++ b/frontend/pages/index.vue
@@ -0,0 +1,6 @@
+<template>
+  <div>
+    <h1>Welcome to the homepage of PalBoard</h1>
+  </div>
+</template>
+  
\ No newline at end of file
diff --git a/frontend/pages/info.vue b/frontend/pages/info.vue
new file mode 100644
index 0000000..4fbeed4
--- /dev/null
+++ b/frontend/pages/info.vue
@@ -0,0 +1,116 @@
+<script setup lang="ts">
+import { ref } from 'vue';
+import { extractFromXml, type FeedData, type FeedEntry } from '@extractus/feed-extractor'
+
+const { data: info } = await useFetch<{
+  version: string;
+  name: string;
+}>('/proxy/gateway/info', {
+  parseResponse: (text) => {
+    const regex = /\[v([\d\.]+)\] (.+)/g;
+    const matches = regex.exec(text);
+    if (matches === null) {
+      return undefined;
+    } else {
+      const version = matches[1];
+      const name = matches[2];
+      return { version, name };
+    }
+  }
+})
+
+const { data: serverUpdates } = await useFetch<FeedEntry[]>(
+  '/proxy/steamdb/PatchnotesRSS/?appid=2394010', {
+  parseResponse: (text) => extractFromXml(text).entries?.map((e) => ({
+    ...e,
+    ...e.published && { published: new Date(e.published) },
+  })),
+})
+const { data: clientUpdates } = await useFetch<FeedEntry[]>(
+  '/proxy/steamdb/PatchnotesRSS/?appid=1623730', {
+  parseResponse: (text) => extractFromXml(text).entries?.map((e) => ({
+    ...e,
+    ...e.published && { published: new Date(e.published) },
+  })),
+})
+const updates = computed(() =>
+  [...clientUpdates.value ?? [], ...serverUpdates.value ?? []]
+    .sort((a, b) => b.published - a.published))
+
+const page = ref(1)
+const pageCount = 8
+const rows = computed(() => {
+  return updates.value?.slice((page.value - 1) * pageCount, (page.value) * pageCount)
+})
+
+const shutdownModal = ref(false)
+</script>
+
+<template>
+  <div class="flex flex-col gap-4">
+    <div class="flex flex-col gap-2">
+      <div class="flex gap-2">
+        <UIcon class="block h-20 w-20" name="i-heroicons-server-stack" />
+        <div class="flex flex-col justify-center">
+          <p v-if="!info">Loading...</p>
+          <h1 v-if="info" class="text-4xl font-bold">{{ info.name }}</h1>
+          <p v-if="info" class="text-gray-500 dark:text-gray-400">Version: {{ info.version }}</p>
+        </div>
+      </div>
+      <div class="flex justify-end px-3 gap-2">
+        <UButton color="primary" variant="solid" label="Broadcast" icon="i-heroicons-chat-bubble-bottom-center-text" />
+        <UButton disabled color="primary" variant="outline" label="Update" icon="i-heroicons-arrow-path-rounded-square" />
+        <UButton @click="shutdownModal = true" color="red" variant="solid" label="Shutdown" icon="i-heroicons-power" />
+        <UModal v-model="shutdownModal">
+          <UCard :ui="{ ring: '', divide: 'divide-y divide-gray-100 dark:divide-gray-800' }">
+            <template #header>
+              How would you like to shutdown the server?
+            </template>
+            <div class="flex flex-col gap-2">
+              <UFormGroup label="Time before shutdown">
+                <UInput placeholder="0 => /DoExit" icon="i-heroicons-clock">
+                  <template #trailing>
+                    <span class="text-gray-500 dark:text-gray-400 text-xs">seconds</span>
+                  </template>
+                </UInput>
+              </UFormGroup>
+              <UFormGroup label="Broadcast message">
+                <UInput placeholder="Optional" icon="i-heroicons-chat-bubble-bottom-center-text" />
+              </UFormGroup>
+            </div>
+            <template #footer>
+              <div class="flex gap-2 justify-end">
+                <UButton color="primary" variant="solid" label="OK" />
+                <UButton @click="shutdownModal = false" color="primary" variant="outline" label="Cancel" />
+              </div>
+            </template>
+          </UCard>
+        </UModal>
+      </div>
+    </div>
+    <!-- <UDivider /> -->
+    <div class="">
+      <h1 class="text-2xl">Patch Notes</h1>
+      <UTable :loading="updates === undefined" :rows="rows" :columns="[{
+        key: 'id',
+        label: 'ID'
+      }, {
+        key: 'title',
+        label: 'Title'
+      }, {
+        key: 'published',
+        label: 'Published'
+      }]">
+        <template #title-data="{ row }: { row: FeedEntry }">
+          <a class="underline" target="_blank" :href="row.link">{{ row.title }}</a>
+        </template>
+        <template #published-data="{ row }: { row: FeedEntry }">
+          {{ row.published?.toLocaleString() ?? "Unavailable" }}
+        </template>
+      </UTable>
+      <div class="flex justify-end px-3 py-3.5 border-t border-gray-200 dark:border-gray-700">
+        <UPagination v-if="updates" v-model="page" :page-count="pageCount" :total="updates.length" />
+      </div>
+    </div>
+  </div>
+</template>
diff --git a/frontend/pages/players.vue b/frontend/pages/players.vue
new file mode 100644
index 0000000..5c99215
--- /dev/null
+++ b/frontend/pages/players.vue
@@ -0,0 +1,60 @@
+<script setup lang="ts">
+import { ref } from 'vue';
+
+const { data: players, refresh: refreshPlayers } = await useFetch<Player[]>('/proxy/gateway/players')
+const page = ref(1)
+const pageCount = 5
+const rows = computed(() => {
+  return players.value?.slice((page.value - 1) * pageCount, (page.value) * pageCount)
+})
+
+const actions = (row: Player) => [[{
+  label: 'Copy Steam ID',
+  icon: 'i-heroicons-document-duplicate-20-solid',
+  click: () => navigator.clipboard.writeText(row.steamid)
+}, {
+  label: 'View Steam Profile',
+  icon: 'i-heroicons-magnifying-glass-20-solid',
+  click: () => window.open(`https://steamcommunity.com/profiles/${row.steamid}`)
+}], [{
+  label: 'Kick from server',
+  icon: 'i-heroicons-face-frown-20-solid',
+  click: () => console.log('/Kick', row.steamid)
+}, {
+  label: 'Ban from server',
+  icon: 'i-heroicons-no-symbol-20-solid',
+  click: () => console.log('/Ban', row.steamid)
+}]]
+</script>
+
+<template>
+  <div class="">
+    <div class="">
+      <UTable :loading="!players" :rows="rows" :columns="[{
+        key: 'name',
+        label: 'Name'
+      }, {
+        key: 'playeruid',
+        label: 'Player UID'
+      }, {
+        key: 'steamid',
+        label: 'Steam ID'
+      }, { key: 'action' }]">
+        <template #steamid-data="{ row }: { row: Player }">
+          <a :href="row.steamid">{{ row.steamid }}</a>
+        </template>
+        <template #action-header="{ }">
+          <UButton @click="refreshPlayers()" color="gray" variant="ghost" icon="i-heroicons-arrow-path-20-solid" />
+        </template>
+        <template #action-data="{ row }: { row: Player }">
+          <UDropdown :items="actions(row)">
+            <UButton color="gray" variant="ghost" icon="i-heroicons-ellipsis-horizontal-20-solid" />
+          </UDropdown>
+        </template>
+      </UTable>
+      <div class="flex justify-end px-3 py-3.5 border-t border-gray-200 dark:border-gray-700">
+        <UPagination v-if="players" v-model="page" :page-count="pageCount" :total="players.length" />
+      </div>
+    </div>
+  </div>
+</template>
diff --git a/frontend/pages/saves.vue b/frontend/pages/saves.vue
new file mode 100644
index 0000000..e61b142
--- /dev/null
+++ b/frontend/pages/saves.vue
@@ -0,0 +1,6 @@
+<template>
+  <div>
+    Sorry but currently we can only...
+  </div>
+  <UButton color="primary" variant="solid" label="Save the World Data" />
+</template>
\ No newline at end of file
diff --git a/frontend/public/favicon.ico b/frontend/public/favicon.ico
new file mode 100644
index 0000000..18993ad
Binary files /dev/null and b/frontend/public/favicon.ico differ
diff --git a/frontend/server/tsconfig.json b/frontend/server/tsconfig.json
new file mode 100644
index 0000000..b9ed69c
--- /dev/null
+++ b/frontend/server/tsconfig.json
@@ -0,0 +1,3 @@
+{
+  "extends": "../.nuxt/tsconfig.server.json"
+}
diff --git a/frontend/stores/settings.ts b/frontend/stores/settings.ts
new file mode 100644
index 0000000..374b4d0
--- /dev/null
+++ b/frontend/stores/settings.ts
@@ -0,0 +1,12 @@
+import { ref, computed } from "vue";
+import { defineStore } from "pinia";
+
+export const useCounterStore = defineStore("counter", () => {
+  const count = ref(0);
+  const doubleCount = computed(() => count.value * 2);
+  function increment() {
+    count.value++;
+  }
+
+  return { count, doubleCount, increment };
+});
diff --git a/frontend/tsconfig.json b/frontend/tsconfig.json
new file mode 100644
index 0000000..a746f2a
--- /dev/null
+++ b/frontend/tsconfig.json
@@ -0,0 +1,4 @@
+{
+  // https://nuxt.com/docs/guide/concepts/typescript
+  "extends": "./.nuxt/tsconfig.json"
+}
diff --git a/gateway/.cargo/config.toml b/gateway/.cargo/config.toml
new file mode 100644
index 0000000..16f1e73
--- /dev/null
+++ b/gateway/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = ["--cfg", "tokio_unstable"]
\ No newline at end of file
diff --git a/gateway/.gitignore b/gateway/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/gateway/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/gateway/Cargo.lock b/gateway/Cargo.lock
new file mode 100644
index 0000000..7411d96
--- /dev/null
+++ b/gateway/Cargo.lock
@@ -0,0 +1,1767 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "addr2line"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
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diff --git a/gateway/Cargo.toml b/gateway/Cargo.toml
new file mode 100644
index 0000000..4ebaf03
--- /dev/null
+++ b/gateway/Cargo.toml
@@ -0,0 +1,26 @@
+[package]
+name = "palboard-gateway"
+version = "0.1.0"
+edition = "2021"
+license = "SSPL-1.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+axum = { version = "0.7.4", features = ["http2"] }
+bytes = "1.5.0"
+console-subscriber = "0.2.0"
+csv = "1.3.0"
+futures-util = { version = "0.3.30", features = ["sink"] }
+pest = "2.7.6"
+pest_derive = "2.7.6"
+rust-ini = "0.20.0"
+serde = { version = "1.0.195", features = ["derive"] }
+serde_json = "1.0.112"
+thiserror = "1.0.56"
+tokio = { version = "1.35.1", features = ["full"] }
+tokio-stream = { version = "0.1.14", features = ["full"] }
+tokio-util = { version = "0.7.10", features = ["full"] }
+tower-http = { version = "0.5.1", features = ["trace"] }
+tracing = "0.1.40"
+tracing-subscriber = "0.3.18"
diff --git a/gateway/src/lib.rs b/gateway/src/lib.rs
new file mode 100644
index 0000000..2e184ec
--- /dev/null
+++ b/gateway/src/lib.rs
@@ -0,0 +1,3 @@
+pub mod unreal_struct;
+pub mod rcon;
+pub mod pal;
diff --git a/gateway/src/main.rs b/gateway/src/main.rs
new file mode 100644
index 0000000..c95a3ac
--- /dev/null
+++ b/gateway/src/main.rs
@@ -0,0 +1,156 @@
+// fn main() {
+//     let i = Ini::load_from_file("/Users/shiroki/Downloads/DefaultPalWorldSettings.ini").unwrap();
+//     for (sec, prop) in i.iter() {
+//         println!("Section: {:?}", sec);
+//         for (k, v) in prop.iter() {
+//             // println!("{}:{}", k, v);
+//             if v.starts_with('(') && v.ends_with(')') {
+//                 // assume as Unreal config struct
+//                 println!("{k}: {:?}", gateway_rs::unreal_struct::parse_struct(v));
+//             } else {
+//                 println!("{k}: {v}");
+//             }
+//         }
+//     }
+// }
+
+use axum::{
+    extract::State,
+    http::StatusCode,
+    response::{IntoResponse, Response},
+    routing::{get, post},
+    Json, Router,
+};
+use palboard_gateway::pal::{PalServerClient, PalworldCommandError};
+use serde::Deserialize;
+use serde_json::json;
+use std::env;
+use thiserror::Error;
+use tracing::{info, warn};
+
+#[derive(Error, Debug)]
+enum AppError {
+    #[error("error from the inner RCON client")]
+    PalworldCommandError(#[from] PalworldCommandError),
+}
+
+impl IntoResponse for AppError {
+    fn into_response(self) -> Response {
+        (
+            StatusCode::INTERNAL_SERVER_ERROR,
+            format!("Something went wrong: {:?}", self),
+        )
+            .into_response()
+    }
+}
+
+type AppResult<T> = std::result::Result<T, AppError>;
+
+async fn info_handler(State(mut c): State<PalServerClient>) -> AppResult<impl IntoResponse> {
+    let body = c.info().await?;
+    Ok(body)
+}
+
+async fn players_handler(State(mut c): State<PalServerClient>) -> AppResult<impl IntoResponse> {
+    let body = c.show_players().await?;
+    let mut rdr = csv::ReaderBuilder::new()
+        .has_headers(false)
+        .from_reader(body.as_bytes());
+    let vec = rdr
+        .records()
+        .flatten()
+        .flat_map(|rec| {
+            Some(json!({
+                "name": rec.get(0)?,
+                "playeruid": rec.get(1)?,
+                "steamid": rec.get(2)?,
+            }))
+        })
+        .collect::<Vec<_>>();
+    Ok(Json(vec))
+}
+
+#[derive(Deserialize)]
+struct BroadcastRequest {
+    message: String,
+}
+
+async fn broadcast_handler(
+    State(mut c): State<PalServerClient>,
+    Json(req): Json<BroadcastRequest>,
+) -> AppResult<impl IntoResponse> {
+    Ok(c.broadcast(req.message).await?)
+}
+
+#[derive(Deserialize)]
+struct ShutdownRequest {
+    time: usize,
+    message: String,
+}
+async fn shutdown_handler(
+    State(mut c): State<PalServerClient>,
+    Json(req): Json<ShutdownRequest>,
+) -> AppResult<impl IntoResponse> {
+    Ok(c.shutdown(req.time, req.message).await?)
+}
+async fn exit_handler(State(mut c): State<PalServerClient>) -> AppResult<impl IntoResponse> {
+    Ok(c.do_exit().await?)
+}
+
+#[derive(Deserialize)]
+struct KickOrBanRequest {
+    steamid: String,
+}
+async fn kick_handler(
+    State(mut c): State<PalServerClient>,
+    Json(req): Json<KickOrBanRequest>,
+) -> AppResult<impl IntoResponse> {
+    Ok(c.kick_player(req.steamid).await?)
+}
+async fn ban_handler(
+    State(mut c): State<PalServerClient>,
+    Json(req): Json<KickOrBanRequest>,
+) -> AppResult<impl IntoResponse> {
+    Ok(c.ban_player(req.steamid).await?)
+}
+
+async fn save_handler(State(mut c): State<PalServerClient>) -> AppResult<impl IntoResponse> {
+    Ok(c.save().await?)
+}
+
+#[tokio::main]
+async fn main() {
+    console_subscriber::init();
+    // tracing_subscriber::fmt::init();
+
+    let client = {
+        let mut c = PalServerClient::dial(
+            env::var("PALSERVER_ADDR").expect("you should set `PALSERVER_ADDR` (and optionally `PALSERVER_PASSWORD`) environment variable"), 
+            env::var("PALSERVER_PASSWORD").ok())
+            .await
+            .expect("failed to dial Pal Server");
+        let info = c.info().await.expect("failed to get info");
+        info!("Client dial succeeded: {}", info.trim());
+        c
+    };
+
+    let app = Router::new()
+        .route("/shutdown", post(shutdown_handler))
+        .route("/exit", post(exit_handler))
+        .route("/broadcast", post(broadcast_handler))
+        .route("/kick", post(kick_handler))
+        .route("/ban", post(ban_handler))
+        .route("/players", get(players_handler))
+        .route("/info", get(info_handler))
+        .route("/save", post(save_handler))
+        .with_state(client);
+
+    let listener = tokio::net::TcpListener::bind(env::var("GATEWAY_ADDR").unwrap_or_else(|_| {
+        warn!("you should set `GATEWAY_ADDR` environment variable, frontend will connect to this address");
+        "127.0.0.1:8080".to_string()
+    }))
+    .await
+    .unwrap();
+    info!("Listening on {}", listener.local_addr().unwrap());
+    axum::serve(listener, app).await.unwrap();
+}
diff --git a/gateway/src/pal.rs b/gateway/src/pal.rs
new file mode 100644
index 0000000..981378c
--- /dev/null
+++ b/gateway/src/pal.rs
@@ -0,0 +1,107 @@
+use std::{sync::Arc, time::Duration};
+use tokio::{
+    net::ToSocketAddrs,
+    sync::{mpsc, oneshot},
+    time::timeout,
+};
+
+use crate::rcon::RCONClient;
+use thiserror::Error;
+use tracing::instrument;
+
+#[derive(Debug, Clone)]
+pub struct PalServerClient {
+    tx: mpsc::Sender<(String, oneshot::Sender<tokio::io::Result<String>>)>,
+    _runner: Arc<tokio::task::JoinHandle<()>>,
+}
+
+#[derive(Error, Debug)]
+pub enum PalworldCommandError {
+    #[error("error from the inner RCON client")]
+    RCONError(#[from] tokio::io::Error),
+    #[error("the mpsc channel rx used to receive the command was dropped")]
+    RunnerDroppedCommandRx(mpsc::error::SendError<CommandReciple>),
+    #[error("the oneshot channel tx used to return the result was dropped")]
+    RunnerDroppedReturnTx(oneshot::error::RecvError),
+}
+
+type CommandReciple = (String, oneshot::Sender<tokio::io::Result<String>>);
+type PalResult<T> = std::result::Result<T, PalworldCommandError>;
+
+impl PalServerClient {
+    #[instrument(skip_all)]
+    async fn task_runner(mut client: RCONClient, mut command_rx: mpsc::Receiver<CommandReciple>) {
+        loop {
+            match timeout(Duration::from_secs(5), command_rx.recv()).await {
+                Ok(None) => break,
+                Ok(Some((command, tx))) => {
+                    let result = client.exec(command).await;
+                    if let Err(_) = tx.send(result) {
+                        tracing::error!("failed to send result back");
+                        break;
+                    };
+                }
+                Err(_) => {
+                    // timeout, send a keepalive
+                    let res = client.exec("ShowPlayers").await;
+                    if let Err(_) = res {
+                        tracing::error!("failed to send keepalive");
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    pub async fn dial(
+        addr: impl ToSocketAddrs,
+        password: Option<impl ToString>,
+    ) -> Result<Self, Box<dyn std::error::Error>> {
+        let client = RCONClient::dial(addr, password).await?;
+        let (tx, rx) = mpsc::channel(32);
+        let _runner = Arc::new(tokio::spawn(Self::task_runner(client, rx)));
+        Ok(Self { tx, _runner })
+    }
+    async fn exec(&mut self, command: String) -> Result<String, PalworldCommandError> {
+        let (tx, rx) = oneshot::channel();
+        self.tx
+            .send((command, tx))
+            .await
+            .map_err(PalworldCommandError::RunnerDroppedCommandRx)?;
+
+        Ok(rx
+            .await
+            .map_err(PalworldCommandError::RunnerDroppedReturnTx)??)
+    }
+    pub async fn shutdown(
+        &mut self,
+        seconds: usize,
+        message_text: impl ToString,
+    ) -> PalResult<String> {
+        self.exec(format!("Shutdown {} {}", seconds, message_text.to_string()))
+            .await
+    }
+    pub async fn do_exit(&mut self) -> PalResult<String> {
+        self.exec("DoExit".to_string()).await
+    }
+    pub async fn broadcast(&mut self, message_text: impl ToString) -> PalResult<String> {
+        self.exec(format!("Broadcast {}", message_text.to_string()))
+            .await
+    }
+    pub async fn kick_player(&mut self, steamid: impl ToString) -> PalResult<String> {
+        self.exec(format!("KickPlayer {}", steamid.to_string()))
+            .await
+    }
+    pub async fn ban_player(&mut self, steamid: impl ToString) -> PalResult<String> {
+        self.exec(format!("BanPlayer {}", steamid.to_string()))
+            .await
+    }
+    pub async fn show_players(&mut self) -> PalResult<String> {
+        self.exec("ShowPlayers".to_string()).await
+    }
+    pub async fn info(&mut self) -> PalResult<String> {
+        self.exec("Info".to_string()).await
+    }
+    pub async fn save(&mut self) -> PalResult<String> {
+        self.exec("Save".to_string()).await
+    }
+}
diff --git a/gateway/src/rcon.rs b/gateway/src/rcon.rs
new file mode 100644
index 0000000..de9bd5e
--- /dev/null
+++ b/gateway/src/rcon.rs
@@ -0,0 +1,159 @@
+use bytes::{Buf, BytesMut};
+use futures_util::{sink::SinkExt, stream::StreamExt};
+use tokio::net::ToSocketAddrs;
+use tokio_util::codec::{Decoder, Encoder};
+use tracing::instrument;
+
+#[derive(Debug)]
+struct RCONCodec;
+
+#[derive(Debug)]
+struct RCONMessage {
+    // size is u32 but only in the wire
+    pub id: i32,
+    pub kind: i32,
+    pub body: String,
+}
+
+const SERVERDATA_AUTH: i32 = 3;
+const SERVERDATA_AUTH_RESPONSE: i32 = 2;
+const SERVERDATA_EXECCOMMAND: i32 = 2;
+const SERVERDATA_RESPONSE_VALUE: i32 = 0;
+
+impl Decoder for RCONCodec {
+    type Item = RCONMessage;
+    type Error = std::io::Error; // TODO: use custom error type
+
+    fn decode(&mut self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
+        if src.len() < 4 {
+            return Ok(None);
+        }
+        let length = {
+            let mut buf = [0u8; 4];
+            (&src[0..4]).copy_to_slice(&mut buf);
+            u32::from_le_bytes(buf) as usize
+        };
+        if length > 4096 {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                format!("Frame of length {} is too large.", length),
+            ));
+        }
+        if src.len() < 4 + length {
+            src.reserve(4 + length - src.len());
+            return Ok(None);
+        }
+        src.advance(4);
+        let id = {
+            let mut buf = [0u8; 4];
+            src.copy_to_slice(&mut buf);
+            i32::from_le_bytes(buf)
+        };
+        let kind = {
+            let mut buf = [0u8; 4];
+            src.copy_to_slice(&mut buf);
+            i32::from_le_bytes(buf)
+        };
+        let body = {
+            let mut buf = vec![0u8; length - 8 - 2];
+            src.copy_to_slice(&mut buf);
+            String::from_utf8(buf)
+        };
+        src.advance(2);
+
+        match body {
+            Ok(body) => Ok(Some(RCONMessage { id, kind, body })),
+            Err(utf8_error) => Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                utf8_error.utf8_error(),
+            )),
+        }
+    }
+}
+
+impl Encoder<RCONMessage> for RCONCodec {
+    type Error = std::io::Error; // TODO: use custom error type
+
+    fn encode(&mut self, item: RCONMessage, dst: &mut BytesMut) -> Result<(), Self::Error> {
+        if item.body.as_bytes().len() + 10 > 4096 {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                format!(
+                    "Frame of length {} is too large.",
+                    item.body.as_bytes().len() + 10
+                ),
+            ));
+        }
+
+        let body = item.body.as_bytes();
+        let length = 4 + 4 + 4 + body.len() + 2;
+        dst.reserve(length);
+        dst.extend_from_slice(&(length as u32).to_le_bytes());
+        dst.extend_from_slice(&item.id.to_le_bytes());
+        dst.extend_from_slice(&item.kind.to_le_bytes());
+        dst.extend_from_slice(body);
+        dst.extend_from_slice(&[0u8; 2]);
+        Ok(())
+    }
+}
+
+#[derive(Debug)]
+pub struct RCONClient {
+    conn: tokio_util::codec::Framed<tokio::net::TcpStream, RCONCodec>,
+}
+
+impl RCONClient {
+    #[instrument(skip_all, err(Debug))]
+    pub async fn dial(
+        addr: impl ToSocketAddrs,
+        password: Option<impl ToString>,
+    ) -> tokio::io::Result<Self> {
+        let stream = tokio::net::TcpStream::connect(addr).await?;
+        let codec = RCONCodec;
+        let mut conn = codec.framed(stream);
+
+        if let Some(password) = password {
+            conn.send(RCONMessage {
+                id: 13,
+                kind: SERVERDATA_AUTH,
+                body: password.to_string(),
+            })
+            .await?;
+            let response = conn.next().await.ok_or(tokio::io::Error::new(
+                tokio::io::ErrorKind::ConnectionReset,
+                "Connection closed unexpectedly",
+            ))??;
+            if response.id != 13 || response.kind != SERVERDATA_AUTH_RESPONSE {
+                return Err(tokio::io::Error::new(
+                    tokio::io::ErrorKind::InvalidData,
+                    format!(
+                        "Invalid response to auth request: {:?}, probably wrong password",
+                        response
+                    ),
+                ));
+            }
+        }
+
+        Ok(RCONClient { conn })
+    }
+    pub async fn exec(&mut self, command: impl ToString) -> tokio::io::Result<String> {
+        self.conn
+            .send(RCONMessage {
+                id: 14,
+                kind: SERVERDATA_EXECCOMMAND,
+                body: command.to_string(),
+            })
+            .await?;
+        let response = self.conn.next().await.ok_or(tokio::io::Error::new(
+            tokio::io::ErrorKind::ConnectionReset,
+            "Connection closed unexpectedly",
+        ))??;
+        if response.kind != SERVERDATA_RESPONSE_VALUE {
+            return Err(tokio::io::Error::new(
+                tokio::io::ErrorKind::InvalidData,
+                format!("Invalid response to exec request: {:?}", response),
+            ));
+        }
+        Ok(response.body)
+    }
+}
diff --git a/gateway/src/unreal_struct.pest b/gateway/src/unreal_struct.pest
new file mode 100644
index 0000000..223ca5f
--- /dev/null
+++ b/gateway/src/unreal_struct.pest
@@ -0,0 +1,15 @@
+identifier = { ASCII_ALPHA ~ (ASCII_ALPHANUMERIC | "_")* }
+
+primitive = { (!"," ~ ANY)+ }
+
+string = ${ "\"" ~ inner ~ "\"" }
+inner = @{ char* }
+char = {
+    !("\"" | "\\") ~ ANY
+    | "\\" ~ ("\"" | "\\" | "/" | "b" | "f" | "n" | "r" | "t")
+    | "\\" ~ ("u" ~ ASCII_HEX_DIGIT{4})
+}
+
+prop = { identifier ~ "=" ~ (string | primitive) }
+
+struct = { SOI ~ "(" ~ prop ~ ("," ~ prop)* ~ ")" ~ EOI }
diff --git a/gateway/src/unreal_struct.rs b/gateway/src/unreal_struct.rs
new file mode 100644
index 0000000..677a838
--- /dev/null
+++ b/gateway/src/unreal_struct.rs
@@ -0,0 +1,41 @@
+use pest::Parser;
+use pest_derive::Parser;
+
+#[derive(Parser)]
+#[grammar = "unreal_struct.pest"]
+pub struct UnrealSturctParser;
+
+#[derive(Debug)]
+pub enum Value {
+    Primitive(String),
+    String(String),
+}
+
+// pub fn is_parentheses_surrounded(s: &str) -> bool {
+//     s.starts_with('(') && s.ends_with(')')
+// }
+
+pub fn parse_struct(s: &str) -> Vec<(String, Value)> {
+    // assert!(is_parentheses_surrounded(s));
+    assert!(s.starts_with('(') && s.ends_with(')'));
+    let s = UnrealSturctParser::parse(Rule::r#struct, s)
+        .unwrap()
+        .next()
+        .unwrap();
+    let mut props: Vec<(String, Value)> = Vec::new();
+    for prop in s.into_inner().filter(|p| p.as_rule() == Rule::prop) {
+        let mut inner = prop.into_inner();
+        let name = inner.next().unwrap().as_str();
+        let value = inner.next().unwrap();
+
+        props.push((
+            name.to_string(),
+            match value.as_rule() {
+                Rule::primitive => Value::Primitive(value.as_str().to_string()),
+                Rule::string => Value::String(value.as_str().trim_matches('"').to_string()),
+                _ => unreachable!(),
+            },
+        ));
+    }
+    props
+}