Initial work on UDP mode ICMP ping (https://keith.github.io/xcode-man-pages/icmp.4.html#Non-privileged_ICMP )

Add some docs
Consider player count in 'play now' server auto selection :D
2026-03-22 12:16:15 +00:00 · 2026-01-20 09:19:16 -06:00 · 2026-01-17 22:45:08 -06:00 · 2026-01-17 13:51:34 -06:00 · 2026-01-17 13:32:51 -06:00 · 2026-01-15 08:38:35 -06:00
11 changed files with 707 additions and 4 deletions
--- a/docs/README.md
+++ b/docs/README.md
@@ -0,0 +1,35 @@
+# Documentation
+
+## File Formats
+
+Documentation and examples of file formats.
+
+### [Legacy Manifest](file_formats/LEGACY_MANIFEST.md)
+
+Blue Hell Productions `manifest.xml`. Still in use by W3D Hub.
+
+### [Megafest](file_formats/MEGAFEST.md)
+
+Prototype new thing `megafest.json`
+
+### [MIX](file_formats/MIX.md)
+
+Westwood archive format `<name>.mix`, `<name>.dat` and `<name>.pkg`
+
+### [W3D Hub Patch](file_formats/W3D_HUB_PATCH.md)
+
+Describes how to update a MIX archive from a package patch
+
+## Protocols
+
+### [LAN Discovery](protocols/LAN_DISCOVERY.md)
+
+How launchers and other applications discovery each other.
+
+### [Launcher Remote](protocols/LAUNCHER_REMOTE.md)
+
+Remotely control and get progress reports from the launcher
+
+### [LAN Package Share](protocols/LAN_PACKAGE_SHARE.md)
+
+Enable launchers on the same network to discover each other and share packages over LAN.
--- a/docs/file_formats/LEGACY_MANIFEST.md
+++ b/docs/file_formats/LEGACY_MANIFEST.md
@@ -0,0 +1,73 @@
+# Legacy Manifest
+
+In use since Blue Hell Productions
+
+> [!IMPORTANT]
+> References to packages exclude `.zip`
+
+Example `Full` manifest:
+
+```xml
+
+<BHP_Game_Manifest game="apb" version="0.9935.1.0" type="Full">
+    <Dependency name="msvc-2015.zip"/>
+    <Dependency name="directx-43.zip"/>
+    <File name="game.exe" checksum="C7AE972A2B9CF6EFCADE7919323F048F5CFAF2D40BD5A67D5A91F8D8A3759CA4" package="binaries"/>
+    <File name="MemoryManager.dll" checksum="B60A2B3F6A07D729EE5C2902CB9A6BEDAF55EEDB13F8514BAC0AD6F5D51DD0C2" package="binaries"/>
+    <File name="scripts.dll" checksum="76CAAEBF21E4D6A34C3ABDD474D59580DD1EAB097C9585A1FFC0E28FF0FCAF56" package="binaries"/>
+    <File name="Scripts2.dll" checksum="A0439B3BFE6CB497F402291548A312A9F43C0D38BDAF26C83E21DBD3F4D55702" package="binaries"/>
+    <File name="shared.dll" checksum="17A8797EC5F4C34E241681F4AF76EEA93856D6A1854EC9838B263AEC89CDF036" package="binaries"/>
+    <File name="ttle.dll" checksum="C005EB50D77675CE712B30A4402AB0D152D3993EB509E35AEDCB834CED54FADF" package="binaries"/>
+    <File name="ttversion.txt" checksum="17A9E627A03E20AC33849330468BF8A80B48449C9D473DF45F1052A160083167" package="misc"/>
+    <File name="Data/always.dat" checksum="D4D09149C7B5368AB3947AEC7B6E7781208F592FCA4390261F04A8E9C1887EB3" package="always"/>
+    <File name="Data/RA_Volcano.mix" checksum="4F3CB80BCF200659B3B4B167CCB64ECB36A3BA917681F4AB8027568EC187B88D" package="RA_Volcano"/>
+    <File name="Data/Movies/ea_ww.bik" checksum="065B8B0894CF9C1C09A940D26069C54A771EBB3092143BA37E97F8CA85B8CCAD" package="movies"/>
+    <File name="Data/Movies/R_Intro.BIK" checksum="0D9A2B2ABFD9680DF1C8D0F876DA4B60F015CA5C56EC6C0593528A3F88E2A58F" package="movies"/>
+</BHP_Game_Manifest>
+```
+
+Example `Patch` manifest:
+
+```xml
+
+<BHP_Game_Manifest game="apb" version="3.6.4.1" type="Patch" baseVersion="3.6.4.0">
+    <Dependency name="msvc-2022.zip"/>
+    <Dependency name="msvc-2015.zip" removedsince="3.6.4.1"/>
+    <File name="data/Always.dat" checksum="7B27D547E5A50401C9CA2851ACD4AC3F3CDA104F34650E1C32EB63A4120E3C90">
+        <Patch from="3.6.4.0" package="Always.patch.3.6.4.0"/>
+    </File>
+    <File name="data/Always_Emitters.dat" checksum="5C3EA8E5C4D7278F5EF1AF3CE1FC4F698C5A7D1FE7116DA0376A709E7CD3B2AE">
+        <Patch from="3.6.3.0" package="Always_Emitters.patch.3.6.3.0"/>
+    </File>
+    <File name="data/Always_Vehicles.dat" checksum="C6D4F6B3412C26065DE9B9F739BEC041B49FD613DB2686D8F231C2F692B263C5">
+        <Patch from="3.6.4.0" package="Always_Vehicles.patch.3.6.4.0"/>
+    </File>
+    <File name="data/RA_TestUnits.mix" removedsince="3.6.4.1"/>
+    <File name="data/RA_RidgeWar.mix" checksum="C3438C532C27F535CD958BEA9702160E952BC6CE58F9B43778F91DA23C6AE9FE" package="RA_RidgeWar"/>
+    <File name="data/RA_SwampOfIllusions.mix" checksum="A0787979664E5977A1949587382A3A84B9F1526F81934EBB7A3AC9334F9D4059">
+        <Patch from="3.6.4.0" package="RA_SwampOfIllusions.patch.3.6.4.0"/>
+    </File>
+</BHP_Game_Manifest>
+```
+
+## SPECIFICATION
+### BHP_GAME_MANIFEST (Root Element)
+* **GAME** - Unique Application ID
+* **VERSION** - Application Unique Version for Build
+* **TYPE** - Type of Build
+  * **Full** - Full Build
+  * **Patch** - Patch Build
+* **BASEVERSION** - *OPTIONAL* Version this build was based upon 
+
+### DEPENDENCY
+* **NAME** - Package name of dependency sans file extension
+* **REMOVEDSINCE** - _OPTIONAL_ No data. Not used anymore?
+
+### FILE
+* **NAME** - Name of file
+* **CHECKSUM** - _OPTIONAL_ SHA256 hash of file
+* **PACKAGE** - _OPTIONAL_ Package that contains this file. Not present on removed files or files that have been patched.
+* **REMOVEDSINCE** - _OPTIONAL_ Version this package was removed in. If present, only _NAME_ and _REMOVEDSINCE_ will be present.
+  * **PATCH**
+    * **FROM** - Version that the file last changed
+    * **PACKAGE** - Name of package that contains this file.
--- a/docs/file_formats/MEGAFEST.md
+++ b/docs/file_formats/MEGAFEST.md
@@ -0,0 +1,319 @@
+> [!NOTE]
+> DRAFT
+
+# Megafest
+
+The fat manifest for W3D Hub Packager and Launcher(s), represented as a JSON hash.
+
+This **MEGAFEST** is intended to simplify patch generation and distribution by ensuring that
+all the data the Packager and Launcher(s) need can be found in a **single** manifest file.
+
+Speed up application packaging by only needing to scan and checksum the new builds files instead of needing
+to maintain a pristine copy of the previous version to be diffed against.
+
+Reduce the number of requests that the launcher(s) need to make to sort out how to download and
+patch the application.
+
+## Glossary
+
+### File
+
+An individual file on disk.
+
+An individual file as part of a MIX archive.
+
+### Package
+
+A collection of one or more files in a compressed archive for efficiently distributing the application.
+
+> [!NOTE]
+> Packages _MAY_ be compressed using ZSTANDARD (.zst) in the future. Do not assume all packages are zip files.
+>
+> Package names in the megafest include the file extension for this reason. 
+
+## Example `megafest.json` File
+
+```json
+{
+  "spec": 0,
+  "application": {
+    "id": "apb",
+    "version": "3.7.0.1",
+    "user_level": "public",
+    "previous_versions": [
+      "3.7.0.0"
+    ]
+  },
+  "dependencies": [
+    "msvc-2022"
+  ],
+  "packages": [
+    {
+      "name": "binaries.zip",
+      "version": "3.7.0.0",
+      "checksum": "SHA256-HASH",
+      "size": 4096,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "files": [
+        {
+          "name": "game2.exe",
+          "checksum": "SHA256-HASH",
+          "size": 8691743
+        }
+      ]
+    },
+    {
+      "name": "data/Always.dat.zip",
+      "version": "3.7.0.0",
+      "checksum": "SHA256-HASH",
+      "size": 1355917483,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "files": [
+        {
+          "name": "mp_wep_gdi.w3d",
+          "checksum": "CRC32-HASH",
+          "offset": 0,
+          "size": 8691743
+        }
+      ]
+    },
+    {
+      "name": "data/Always.patch.3.7.0.0.zst",
+      "version": "3.7.0.1",
+      "checksum": "SHA256-HASH",
+      "size": 1355919483,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "from_version": "3.7.0.0",
+      "files": [
+        {
+          "name": "data/Always.patch",
+          "checksum": "SHA256-HASH",
+          "size": 8691743
+        }
+      ]
+    },
+    {
+      "name": "binaries.zip",
+      "version": "3.7.0.1",
+      "checksum": "SHA256-HASH",
+      "size": 4096,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "files": [
+        {
+          "name": "game.exe",
+          "checksum": "SHA256-HASH",
+          "size": 8691743
+        }
+      ]
+    }
+  ],
+  "changes": [
+    {
+      "name": "game.exe",
+      "type": "added",
+      "package": "binaries"
+    },
+    {
+      "name": "game2.exe",
+      "type": "removed"
+    },
+    {
+      "name": "data/Always.dat",
+      "type": "updated",
+      "package": "Always.dat"
+    }
+  ],
+  "index": [
+    {
+      "name": "game.exe",
+      "checksum": "SHA256-HASH",
+      "size": 8691743
+    },
+    {
+      "name": "data/Always.dat",
+      "checksum": "SHA256-HASH",
+      "size": 1355917483
+    }
+  ]
+}
+```
+
+## SPECIFICATION
+
+### Application
+
+List of application details:
+
+* **ID** - Unique Application ID
+* **VERSION** - Application Unique Version
+* **USER_LEVEL** - User access level for this version
+* **PREVIOUS_VERSIONS** - Complete list of previous versions. Full builds only include _the_ previous version
+
+Example:
+
+```json
+{
+  "id": "apb",
+  "version": "3.7.0.1",
+  "user_level": "public",
+  "previous_versions": [
+    "3.7.0.0"
+  ]
+}
+```
+
+### Dependencies
+
+List of application's dependencies
+
+Example:
+
+```json
+[
+  "msvc-2022"
+]
+```
+
+### Packages
+
+Complete list of application's version tree of packages.
+
+That is, every package from the last full build to present for this version series.
+
+* **NAME** - Name of package
+* **VERSION** - Application version this package belongs to
+* **CHECKSUM** - SHA256 checksum of package
+* **SIZE** - File size of package in bytes
+* CHUNK **SIZE** - Size _CHUNK_CHECKSUMS_ represent in bytes
+* **CHUNK_CHECKSUMS** - Array of file chunk checksums
+* **FROM_VERSION** - *OPTIONAL* Version this file was last changed. Only present for MIX patches.
+* **FILES** - Array of files
+    * **NAME**
+    * **CHECKSUM** - SHA256 checksum of file.
+    * **SIZE** - File size in bytes
+
+Example:
+
+```json
+[
+  {
+    "name": "binaries",
+    "version": "3.7.0.0",
+    "checksum": "SHA256-HASH",
+    "size": 4096,
+    "chunk_size": 4194304,
+    "chunk_checksums": [
+      "SHA256-HASH-A",
+      "SHA256-HASH-B"
+    ],
+    "files": [
+      {
+        "name": "game.exe",
+        "checksum": "SHA256-HASH",
+        "size": 8691743
+      }
+    ]
+  },
+  {
+    "name": "data/Always.patch.3.7.0.0",
+    "version": "3.7.0.1",
+    "checksum": "SHA256-HASH",
+    "size": 2436543,
+    "chunk_size": 4194304,
+    "chunk_checksums": [
+      "SHA256-HASH-A",
+      "SHA256-HASH-B"
+    ],
+    "from_version": "3.7.0.0",
+    "files": [
+      {
+        "name": "data/Always.patch",
+        "checksum": "SHA256-HASH",
+        "size": 3636749
+      }
+    ]
+  }
+]
+```
+
+### Changes
+
+List of file changes in this build.
+
+* **NAME** - Name of file
+* **TYPE** - Type of change
+    * **ADDED** - New file has been added
+    * **UPDATED** - File has been changed
+    * **REMOVED** - File has been deleted
+* **PACKAGE** - _OPTIONAL_ Name of package, for this build version, the file can be found in
+
+```json
+[
+  {
+    "name": "game.exe",
+    "type": "updated",
+    "package": "binaries.zip"
+  },
+  {
+    "name": "game2.exe",
+    "type": "removed"
+  },
+  {
+    "name": "data/Always.dat",
+    "type": "added",
+    "package": "Always.dat.zip"
+  }
+]
+```
+
+### Index
+
+Complete list of files for this build with: filename, checksum, file size, and list of files for MIX archives.
+
+* **NAME** - File name
+* **CHECKSUM** - SHA256 hash of file
+* **SIZE** - File size
+* **FILES** - _OPTIONAL_ List of files inside of MIX archives
+  * **NAME** - File name
+  * **CHECKSUM** - CRC32 hash of file data
+  * **OFFSET** - Offset of file in MIX archive
+  * **SIZE** - Size of file data
+
+```json
+[
+  {
+    "name": "game.exe",
+    "checksum": "SHA256-HASH",
+    "size": 8691743
+  },
+  {
+    "name": "data/Always.dat",
+    "checksum": "SHA256-HASH",
+    "size": 570961432,
+    "files": [
+      {
+        "name": "mp_wep_gdi.w3d",
+        "checksum": "CRC32_HASH",
+        "offset": 0,
+        "size": 3524
+      }
+    ]
+  }
+]
+```
--- a/docs/file_formats/MIX.md
+++ b/docs/file_formats/MIX.md
@@ -0,0 +1,132 @@
+# Westwood Renegade MIX Archive
+
+with W3D Hub / Tiberian Technologies alterations
+
+The .MIX archive file format is used by Renegade as _yes_.
+
+> [!IMPORTANT]
+> The MIX format has no notion about directories.
+>
+> Each file name **MUST** be unique.
+>
+> e.g. `data/map.dds` and `data/RA_Under/MAP.dds` have the same base file name
+> and therefore **MUST** raise an error when writing.
+
+> [!NOTE]
+> `io_pos` is the current position on the seek head of the open file
+
+## Reading
+
+* Read [Header](#header)
+    * validate MIME type (`MIX1` or `MIX2`)
+* Jump to io_pos `file_data_offset`
+* Read `file_count`
+* Read array of [`file_data`](#file-data-array)
+* Jump to io_pos `file_names_offset`
+* Read `file_count`
+* Read array of [`file_names`](#file-names-array)
+* Read file blobs
+    * For each file's [`file_data`](#file-data-array)
+        * Jump io_pos to `file_content_offset`
+        * Read `file_content_length`
+* Done.
+
+## Writing
+
+* Write MIME type (`MIX1` or `MIX2`)
+* Jump to io_pos `16`
+* Write file blobs
+    * **IMPORTANT:** Add `-io_pos & 7` padding to io_pos **AFTER** each file blob is written
+    * Save io_pos as `file_data_offset`
+* Write `file_count`
+    * Write array of [`file_data`](#file-data-array)
+    * Save io_pos as `file_names_offset`
+* Write `file_count`
+    * Write array of [`file_names`](#file-names-array)
+        * **IMPORTANT:** Ensure file names are null terminated and DO NOT exceed 254 (+ null byte) characters in length.
+* Jump to io_pos `4`
+    * Write [`file_data_offset`](#header)
+    * Write [`file_names_offset`](#header)
+    * Write [`reserved`](#header)
+* Done.
+
+## Pseudo Example:
+
+```yml
+header:
+  mime: MIX1 or MIX2
+  file_data_offset: 0x1024EAEA
+  file_names_offset: 0x8192EAEA
+  reserved: 0
+
+files:
+  array:
+    - file_blob
+
+file_data:
+  file_count: 0x000021
+  array:
+    file_name_crc32: 0xEFEFEFEF
+    file_content_offset: 0x3217DEAD
+    file_content_length: 0x0018BEEF
+
+file_names:
+  file_count: 0x000021
+  array:
+    file_name_length: 0xff
+    file_name: "mp_wep_gdi.w3d"
+```
+
+## MIME Types
+
+### MIX1 `0x3158494D`
+
+Westwood Farm Fresh Organic.
+
+### MIX2 `0x3258494D`
+
+Same as `MIX1`. `MIX2` hints to the engine's file reader to decrypt files before use.
+
+## Data Structures
+
+### Header
+
+| Name              | Offset | Type    | Description                                                         |
+|-------------------|--------|---------|---------------------------------------------------------------------|
+| MIME              | 0      | int32_t | 4 bytes representing `MIX1` (`0x3158494D)` or `MIX2` (`0x3258494D`) |
+| File Data Offset  | 4      | int32_t | Offset in MIX archive that [`file_data`](#file-data) data starts    |
+| File Names Offset | 8      | int32_t | Offset in MIX archive that [`file_name`](#file-names) data starts   |
+| RESERVED          | 12     | int32_t | Unused reserved int. Write as `0`                                   |
+
+### File
+
+| Name      | Offset  | Type                        | Description   |
+|-----------|---------|-----------------------------|---------------|
+| File Blob | complex | char[`file_content_length`] | File contents |
+
+### File Data
+
+| Name       | Offset             | Type    | Description                    |
+|------------|--------------------|---------|--------------------------------|
+| File Count | `file_data_offset` | int32_t | Number of files in MIX archive |
+
+### File Data Array
+
+| Name                | Offset                                     | Type     | Description                                            |
+|---------------------|--------------------------------------------|----------|--------------------------------------------------------|
+| File Name CRC32     | `file_data_offset` + 4 * (index * sizeof)  | uint32_t | CRC32 of **UPPERCASE** file name in network byte order |
+| File Content Offset | `file_data_offset` + 8 * (index * sizeof)  | uint32_t | File content offset                                    |
+| File Content Length | `file_data_offset` + 12 * (index * sizeof) | uint32_t | File content length                                    |
+
+### File Names
+
+| Name       | Offset              | Type    | Description                    |
+|------------|---------------------|---------|--------------------------------|
+| File Count | `file_names_offset` | int32_t | Number of files in MIX archive |
+
+### File Names Array
+
+| Name             | Offset  | Type                     | Description                                     |
+|------------------|---------|--------------------------|-------------------------------------------------|
+| File Name Length | complex | uint8_t                  | Length of string in bytes, including null byte. |
+| File Name        | complex | char[`file_name_length`] | null terminated string                          |
--- a/docs/file_formats/W3D_HUB_PATCH.md
+++ b/docs/file_formats/W3D_HUB_PATCH.md
@@ -0,0 +1,19 @@
+# W3D Hub Patch
+A W3D Hub Patch
+
+A `.w3dhub.patch` is included in MIX Patch files.
+It contains instructions for updating the target MIX.
+
+JSON file with a static CRC32 of `E6FE46B8`
+
+## Example:
+```json
+{
+  "removedFiles": [
+    "sov_v_mad.gif"
+  ],
+  "updatedFiles": [
+    "sov_v_mad.w3d"
+  ]
+}
+```
--- a/docs/protocols/LAN_DISCOVERY.md
+++ b/docs/protocols/LAN_DISCOVERY.md
@@ -0,0 +1,36 @@
+> [!NOTE]
+> DRAFT
+
+# LAN Discovery
+
+Doing things
+
+Broadcast port: 4898
+
+| Name              | Type     | Description                                                              |
+|-------------------|----------|--------------------------------------------------------------------------|
+| Version           | int32_t  | Version of protocol this application supports                            |
+| Owner             | string   | Nickname of application's active user                                    |
+| Hostname          | string   | Name of device                                                           |
+| UUID              | string   | Unique identifier for this application                                   |
+| Application       | string   | Name of application                                                      |
+| Features          | array    | Array of strings naming features the application supports                |
+| Service Port      | uint16_t | Dynamically assigned TCP port that interested parties should connect too |
+
+> [!NOTE]
+> Max packet size for UDP broadcast may need to be limited to 512 bytes
+
+```json
+{
+  "version": 0,
+  "owner": "cyberarm",
+  "hostname": "PC-1692",
+  "uuid": "019bcf1e-a22e-7fe0-a3db-3a9d37bfc6fa",
+  "application": "W3D Hub Linux Launcher",
+  "features": [
+    "launcher_remote:3",
+    "package_share:1"
+  ],
+  "service_port": 56802
+}
+```
--- a/docs/protocols/LAN_PACKAGE_SHARE.md
+++ b/docs/protocols/LAN_PACKAGE_SHARE.md
@@ -0,0 +1,9 @@
+> [!NOTE]
+> DRAFT
+
+# LAN Package Share
+
+Authentication is not required, only user opt-in to enable package sharing from their application.
+
+* List available packages
+* upload or download verified packages between other applications on LAN network
--- a/docs/protocols/LAUNCHER_REMOTE.md
+++ b/docs/protocols/LAUNCHER_REMOTE.md
@@ -0,0 +1,9 @@
+> [!NOTE]
+> DRAFT
+
+# Launcher Remote
+
+* Get list of available, installed, and in progress applications
+* Trigger download or update of application
+* Delete application
+* Join server
--- a/lib/api.rb
+++ b/lib/api.rb
@@ -60,15 +60,15 @@ class W3DHub
      end

      # Handle arbitrary urls that may come through
-      url = nil
      if path.start_with?("http")
        uri = URI(path)
+
        endpoint = uri.origin
        path = uri.request_uri
-      else
-        url = "#{endpoint}#{path}"
      end

+      url = "#{endpoint}#{path}"
+
      logger.debug(LOG_TAG) { "Fetching #{method.to_s.upcase} \"#{url}\"..." }

      # Inject Authorization header if account data is populated
--- a/lib/application_manager.rb
+++ b/lib/application_manager.rb
@@ -255,13 +255,14 @@ class W3DHub
        !server.status.password &&
        server.status.player_count < server.status.max_players
      end
+      server_options.sort_by! { |s| [s.status.player_count, s.ping] }.reverse!

      # try to find server with lowest ping and matching version
      found_server = server_options.find { |server| server.version == app_data[:installed_version] }
      # try to find server with lowest ping and undefined version
      found_server ||= server_options.find { |server| server.version == Api::ServerListServer::NO_OR_DEFAULT_VERSION }

-      found_server ? found_server : nil
+      found_server || nil
    end

    def play_now(app_id, channel)
--- a/lib/ping.rb
+++ b/lib/ping.rb
@@ -0,0 +1,70 @@
+require "socket"
+
+ICMPHeader = Data.define(:type, :code, :checksum, :_ping_id, :_sequence_id, :data)
+
+ICMP_ECHOREPLY = 0 # Echo reply
+ICMP_ECHO      = 8 # Echo request
+ICMP_SUBCODE   = 0
+
+# Perform a checksum on the message.  This is the sum of all the short
+# words and it folds the high order bits into the low order bits.
+#
+def checksum(msg)
+  length    = msg.length
+  num_short = length / 2
+  check     = 0
+
+  msg.unpack("n#{num_short}").each do |short|
+    check += short
+  end
+
+  if (length % 2).positive?
+    check += msg[length-1, 1].unpack1("C") << 8
+  end
+
+  check = (check >> 16) + (check & 0xffff)
+  ~((check >> 16) + check) & 0xffff
+end
+
+ip_address = "127.0.0.1" # "example.com" # "timecrafters.org" #
+@ping_id = 92_459_064_892 & 0xffff
+@sequence = 1 % 65_536
+data = ""
+data_size = 56
+data_size.times { |n| data << (n % 256).chr }
+
+check = 0
+packer = "C2 n3 A" << data_size.to_s
+message = [ICMP_ECHO, ICMP_SUBCODE, check, @ping_id, @sequence, data].pack(packer)
+check = checksum(message)
+message = [ICMP_ECHO, ICMP_SUBCODE, check, @ping_id, @sequence, data].pack(packer)
+message_header = ICMPHeader.new(*[ICMP_ECHO, ICMP_SUBCODE, check, @ping_id, @sequence, data])
+socket = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, Socket::IPPROTO_ICMP)
+socket.send(message, 0, Socket.pack_sockaddr_in(0, ip_address))
+s = Time.now
+loop do
+  data, _addrinfo = socket.recvfrom(1500)
+  pp [message, data]
+  header = ICMPHeader.new(*data.unpack("C2 n3 A*"))
+  pp [message_header, header]
+  # reply_type = data[20, 2].unpack1("C2")
+  # pp reply_type
+
+  ping_id = header._ping_id
+  sequence = header._sequence_id
+
+  case header.type
+  when ICMP_ECHOREPLY
+    puts "ECHOREPLY"
+  end
+
+  pp [@ping_id, ping_id]
+  pp [@sequence, sequence]
+
+  if ping_id == @ping_id && sequence == @sequence && reply_type == ICMP_ECHOREPLY
+    puts "PING OKAY: #{Time.now - s}s"
+    break
+  end
+
+  break
+end
Author	SHA1	Message	Date
Cyberarm	d4e4697983	Initial work on UDP mode ICMP ping (https://keith.github.io/xcode-man-pages/icmp.4.html#Non-privileged_ICMP )	2026-01-20 09:19:16 -06:00
Cyberarm	3e949cf863	Add some docs	2026-01-17 22:45:08 -06:00
Cyberarm	027ba27b37	Consider player count in 'play now' server auto selection :D	2026-01-17 13:51:34 -06:00
Cyberarm	adff1f9159	Fix play now auto-selected servers not sorted by ping	2026-01-17 13:32:51 -06:00
Cyberarm	355a4503ea	Fix Api.async_http logging empty urls	2026-01-15 08:38:35 -06:00