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Remove yet another remaining boolean retval, relocating window adjust recv packet handling to get_channel_packet. Ensuring window is adjusted for empty channel prior to send.

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Robert 2024-07-12 14:49:11 -04:00
parent 51a3c5f050
commit 35fcd1984b
1 changed files with 21 additions and 13 deletions
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34
phpseclib/Net/SSH2.php
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@ -104,7 +104,6 @@ class SSH2
const MASK_LOGIN_REQ = 0x00000004;
const MASK_LOGIN = 0x00000008;
const MASK_SHELL = 0x00000010;
const MASK_WINDOW_ADJUST = 0x00000020;
/*
* Channel constants
@ -3157,6 +3156,7 @@ class SSH2
* @return void
* @throws \RuntimeException on connection error
* @throws InsufficientSetupException on unexpected channel status, possibly due to closure
* @throws TimeoutException if the write could not be completed within the requested self::setTimeout()
*/
public function write($cmd, $channel = null)
{
@ -3176,6 +3176,8 @@ class SSH2
}
}
$this->curTimeout = $this->timeout;
$this->is_timeout = false;
$this->send_channel_packet($channel, $cmd);
}
@ -3882,13 +3884,6 @@ class SSH2
$payload = $this->get_binary_packet();
break;
case NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST:
Strings::shift($payload, 1);
list($channel, $window_size) = Strings::unpackSSH2('NN', $payload);
$this->window_size_client_to_server[$channel] += $window_size;
$payload = ($this->bitmap & self::MASK_WINDOW_ADJUST) ? true : $this->get_binary_packet();
}
}
@ -3969,6 +3964,7 @@ class SSH2
*
* - the server closes the channel
* - if the connection times out
* - if a window adjust packet is received on the given negated client channel
* - if the channel status is CHANNEL_OPEN and the response was CHANNEL_OPEN_CONFIRMATION
* - if the channel status is CHANNEL_REQUEST and the response was CHANNEL_SUCCESS
* - if the channel status is CHANNEL_CLOSE and the response was CHANNEL_CLOSE
@ -3977,7 +3973,10 @@ class SSH2
*
* - if the channel status is CHANNEL_REQUEST and the response was CHANNEL_FAILURE
*
* @param int $client_channel
* @param int $client_channel Specifies the channel to return data for, and data received
* on other channels is buffered. The respective negative value of a channel is
* also supported for the case that the caller is awaiting adjustment of the data
* window, and where data received on that respective channel is also buffered.
* @param bool $skip_extended
* @return mixed
* @throws \RuntimeException on connection error
@ -4029,6 +4028,14 @@ class SSH2
}
switch ($type) {
case NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST:
list($window_size) = Strings::unpackSSH2('N', $response);
$this->window_size_client_to_server[$channel] += $window_size;
if ($channel == -$client_channel) {
return true;
}
continue 2;
case NET_SSH2_MSG_CHANNEL_EXTENDED_DATA:
/*
if ($client_channel == self::CHANNEL_EXEC) {
@ -4474,11 +4481,12 @@ class SSH2
protected function send_channel_packet($client_channel, $data)
{
while (strlen($data)) {
if (!$this->window_size_client_to_server[$client_channel]) {
$this->bitmap ^= self::MASK_WINDOW_ADJUST;
while (!$this->window_size_client_to_server[$client_channel]) {
if ($this->isTimeout()) {
throw new TimeoutException('Timed out waiting for server');
}
// using an invalid channel will let the buffers be built up for the valid channels
$this->get_channel_packet(-1);
$this->bitmap ^= self::MASK_WINDOW_ADJUST;
$this->get_channel_packet(-$client_channel);
}
/* The maximum amount of data allowed is determined by the maximum