commit e0137fcb17a24d077dee020002c2c043df52de3f Author: Daniil Gentili Date: Fri Sep 1 21:35:25 2023 +0200 First commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..57872d0 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/vendor/ diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..dba13ed --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/composer.json b/composer.json new file mode 100644 index 0000000..f86ee2c --- /dev/null +++ b/composer.json @@ -0,0 +1,22 @@ +{ + "name": "danog/stun", + "description": "Pure PHP async implementation of STUN", + "type": "library", + "require": { + "php-64bit": ">=8.1.17", + "amphp/socket": "^2.2", + "webmozart/assert": "^1.11" + }, + "license": "AGPLv3", + "autoload": { + "psr-4": { + "Danog\\Stun\\": "src/" + } + }, + "authors": [ + { + "name": "Daniil Gentili", + "email": "daniil@daniil.it" + } + ] +} diff --git a/composer.lock b/composer.lock new file mode 100644 index 0000000..05da33f --- 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Fingerprint::TYPE => Fingerprint::class, + MessageIntegrity::TYPE => MessageIntegrity::class, + MappedAddress::TYPE => MappedAddress::class, + Software::TYPE => Software::class, + Username::TYPE => Username::class, + XorMappedAddress::TYPE => XorMappedAddress::class, + default => null, + }; + + $totalLength -= $length + (4 - ($length%4)); + Assert::true($totalLength >= 0); + + if ($result) { + $result = $result::readAttr($reader, $transactionId, $length, $cancellation); + } else { + $reader->readLength($length, $cancellation); + } + $reader->readLength(4 - ($length % 4), $cancellation); + return $result; + } + + abstract protected static function readAttr(BufferedReader $reader, string $transactionId, int $length, ?Cancellation $cancellation = null): self; + abstract protected function writeAttr(string $transactionId): string; +} diff --git a/src/Attributes/ErrorCode.php b/src/Attributes/ErrorCode.php new file mode 100644 index 0000000..8022347 --- /dev/null +++ b/src/Attributes/ErrorCode.php @@ -0,0 +1,44 @@ + $err + */ + public function __construct( + public readonly int $err, + public readonly string $reason + ) + { + } + protected static function readAttr(BufferedReader $reader, string $transactionId, int $length, ?Cancellation $cancellation = null): Attribute + { + $reader->readLength(2, $cancellation); + $class = ord($reader->readLength(1, $cancellation)); + $number = ord($reader->readLength(1, $cancellation)); + Assert::true($class >= 3); + Assert::true($class <= 6); + Assert::true($number < 100); + return new self($class*100+$number, $reader->readLength($length-4)); + } + protected function writeAttr(string $transactionId): string + { + $number = $this->err % 100; + $class = $this->err - $number; + return "\0\0".chr($class).chr($number).$this->reason; + } +} \ No newline at end of file diff --git a/src/Attributes/Fingerprint.php b/src/Attributes/Fingerprint.php new file mode 100644 index 0000000..4daf5e1 --- /dev/null +++ b/src/Attributes/Fingerprint.php @@ -0,0 +1,33 @@ +readLength(4, $cancellation) ^ self::XOR); + } + protected function writeAttr(string $transactionId): string + { + return $this->crc ^ self::XOR; + } +} \ No newline at end of file diff --git a/src/Attributes/MappedAddress.php b/src/Attributes/MappedAddress.php new file mode 100644 index 0000000..0e3dac3 --- /dev/null +++ b/src/Attributes/MappedAddress.php @@ -0,0 +1,46 @@ += 8, "Wrong length!"); + $reader->readLength(1, $cancellation); + $ip = $reader->readLength($len = match (ord($reader->readLength(1, $cancellation))) { + 1 => 4, + 2 => 16 + }, $cancellation); + Assert::eq($len+4, $length, "Wrong length!"); + $port = unpack('n', $reader->readLength(2, $cancellation))[1]; + return new self(new InternetAddress( + inet_ntop($ip), + $port + )); + } + + protected function writeAttr(string $_): string { + $addr = $this->address->getAddressBytes(); + return "\0".(strlen($addr) === 4 ? 1 : 16).$addr.pack('n', $this->address->getPort()); + } +} \ No newline at end of file diff --git a/src/Attributes/MessageIntegrity.php b/src/Attributes/MessageIntegrity.php new file mode 100644 index 0000000..19009cb --- /dev/null +++ b/src/Attributes/MessageIntegrity.php @@ -0,0 +1,32 @@ +readLength(20, $cancellation)); + } + protected function writeAttr(string $transactionId): string + { + return $this->hmac; + } +} \ No newline at end of file diff --git a/src/Attributes/Software.php b/src/Attributes/Software.php new file mode 100644 index 0000000..d250a4f --- /dev/null +++ b/src/Attributes/Software.php @@ -0,0 +1,31 @@ +readLength($length, $cancellation)); + } + protected function writeAttr(string $transactionId): string + { + return $this->software; + } +} \ No newline at end of file diff --git a/src/Attributes/Username.php b/src/Attributes/Username.php new file mode 100644 index 0000000..a3fafd7 --- /dev/null +++ b/src/Attributes/Username.php @@ -0,0 +1,31 @@ +readLength($length, $cancellation)); + } + protected function writeAttr(string $transactionId): string + { + return $this->username; + } +} \ No newline at end of file diff --git a/src/Attributes/XorMappedAddress.php b/src/Attributes/XorMappedAddress.php new file mode 100644 index 0000000..4eac540 --- /dev/null +++ b/src/Attributes/XorMappedAddress.php @@ -0,0 +1,53 @@ += 8, "Wrong length!"); + $reader->readLength(1, $cancellation); + $ip = match ($len = ord($reader->readLength(1, $cancellation))) { + 1 => $reader->readLength(4, $cancellation) ^ Message::MAGIC_COOKIE, + 2 => $reader->readLength(16, $cancellation) ^ (Message::MAGIC_COOKIE.$transactionId) + }; + $port = unpack('n', $reader->readLength(2, $cancellation) ^ substr(Message::MAGIC_COOKIE, 2))[1]; + Assert::eq($len+4, $length, "Wrong length!"); + return new self(new InternetAddress( + inet_ntop($ip), + $port + )); + } + + protected function writeAttr(string $transactionId): string { + $addr = $this->address->getAddressBytes(); + if (strlen($addr) === 4) { + $addr ^= Message::MAGIC_COOKIE; + } else { + $addr ^= Message::MAGIC_COOKIE.$transactionId; + } + return "\0".(strlen($addr) === 4 ? 1 : 16).$addr.(pack('n', $this->address->getPort()) ^ substr(Message::MAGIC_COOKIE, 2)); + } +} \ No newline at end of file diff --git a/src/Message.php b/src/Message.php new file mode 100644 index 0000000..451b904 --- /dev/null +++ b/src/Message.php @@ -0,0 +1,52 @@ + */ + public readonly array $attributes, + public readonly string $transactionId + ) + { + Assert::true(strlen($transactionId) === 12); + } + public function write(WritableStream $writer): void { + $attributes = ''; + foreach ($this->attributes as $attr) { + $attributes .= $attr->write($this->transactionId); + } + $writer->write( + pack('nn', $this->method->value | $this->class->value, strlen($attributes)). + self::MAGIC_COOKIE.$this->transactionId.$attributes + ); + } + public static function read(BufferedReader $reader, ?Cancellation $cancellation = null): self { + $type = unpack('n', $reader->readLength(2, $cancellation))[1]; + $length = unpack('n', $reader->readLength(2, $cancellation))[1]; + Assert::eq($length % 4, 0); + Assert::eq($reader->readLength(4, $cancellation), self::MAGIC_COOKIE, "Wrong magic cookie!"); + $transactionId = $reader->readLength(12, $cancellation); + + $attributes = []; + while ($length) { + $attributes []= Attribute::read($reader, $length, $transactionId, $cancellation); + } + + return new self( + MessageMethod::from($type & MessageMethod::MASK), + MessageClass::from($type & MessageClass::MASK), + $attributes, + $transactionId + ); + } +} \ No newline at end of file diff --git a/src/MessageClass.php b/src/MessageClass.php new file mode 100644 index 0000000..dae0b09 --- /dev/null +++ b/src/MessageClass.php @@ -0,0 +1,12 @@ +value; +} \ No newline at end of file diff --git a/src/MessageMethod.php b/src/MessageMethod.php new file mode 100644 index 0000000..79fc370 --- /dev/null +++ b/src/MessageMethod.php @@ -0,0 +1,9 @@ + + */ + private array $pendingOutgoing = []; + public function __construct( + private string $endpoint + ) + { + $this->socket = connect($endpoint); + } + + /** + * @return list + */ + public function bind(Attribute ...$attributes): array { + + } +} \ No newline at end of file