ChrisChrome/sccp_manager
1
0
Fork 0
Code Issues Pull requests Actions Packages Projects Releases Wiki Activity

Tighten TFTP read controls

Browse source 
Avoid hanging if no data received by setting timeout. Thanks to @dkgroot  for soulution
This commit is contained in:
steve-lad 2021-06-28 07:17:51 +02:00
parent ee419ae193
commit f882a66eb4
2 changed files with 15 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
install.php
View file

@ -973,7 +973,7 @@ function getConfigMetaData($segment) {
$sysConfiguration[$valueArray['Name']] = $valueArray;
if (array_key_exists($valueArray['Name'],$settingsFromDb)) {
if (!empty($sysConfiguration[$valueArray['Name']]['DefaultValue'])) {
$sql = "UPDATE sccpsettings SET systemdefault = {$valueArray['DefaultValue']} WHERE keyword like '{($valueArray['Name']}'"
$sql = "UPDATE sccpsettings SET systemdefault = '{$valueArray['DefaultValue']}' WHERE keyword = '{$valueArray['Name']}'";
$results = $db->query($sql);
}
}

33
sccpManTraits/helperFunctions.php
View file

@ -161,13 +161,15 @@ trait helperfunctions {
return $result;
}
function tftpReadTestFile($remoteFileName)
function tftpReadTestFile($remoteFileName, $host = "127.0.0.1";)
{
// https://datatracker.ietf.org/doc/html/rfc1350
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
// Set timeout so that do not hang if no data received.
socket_set_option($socket,SOL_SOCKET, SO_RCVTIMEO, array('sec'=>1, 'usec'=>0));
if ($socket) {
$host = "127.0.0.1"; // TODO: Should consider remote TFT Servers in future
$port = 69;
$port = 69; // Initial TFTP port. Changed in received packet.
// create the RRQ request packet
$packet = chr(0) . chr(1) . $remoteFileName . chr(0) . 'netascii' . chr(0);
@ -177,24 +179,17 @@ trait helperfunctions {
$buffer = null;
$port = "";
$ret = "";
// MSG_WAITALL is blocking but socket has timeout set to 1 sec.
$numbytes = socket_recvfrom($socket, $buffer, 84, MSG_WAITALL, $host, $port);
// fetch file content
$count = 0;
while ( 0 == $numbytes = socket_recvfrom($socket, $buffer, 84, MSG_DONTWAIT, $host, $port)) {
sleep(1);
$count ++;
if ($count > 5) {
break;
}
};
// unpack the returned buffer and discard the first two bytes
try {
$pkt = unpack("nopcode/nblockno/a*data", $buffer);
} catch (\Exception $e) {
die_freepbx("TFTP server is not responding. Check that it is running and then reload this page \n");
if ($numbytes < 2) {
// socket has timed out before data received.
return false;
}
// send ack
// unpack the returned buffer and discard the first two bytes.
$pkt = unpack("nopcode/nblockno/a*data", $buffer);
// send ack and close socket.
$packet = chr(4) . chr($pkt["blockno"]);
socket_sendto($socket, $packet, strlen($packet), MSG_EOR, $host, $port);