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我试图建立一些PHP代码，通过telnet发送短信到SIM卡服务器，但我在发送连接消息时遇到了麻烦。如何建立连接的短信pdu？获取垃圾邮件
我读过一些关于使用填充位来使编码的消息字节变成八位字节的事情，但我不完全理解它是如何工作的。
我有一个班，接收电话号码，消息（已经拆分为153chars最大），短信总数和当前部分文本的订单号。
只要我在$ hexmessage之前添加了'20'，它就会工作。但是在第一部分的开头（在我的消息的第一个字母之前）我得到一个垃圾字符，并且替换第二部分的第一个字母的同一个垃圾字符！ （使用'20'，所以它会显示一个空格，但它显示一个三角形）
我不明白为什么，或者我不得不改变它以正常工作。
我希望有人能帮助我理解我做错了什么。
这里是我到目前为止有：
<?php
// Generate PDU string
public function generatePDUm($receiverNumber,$message, $sms_count, $msg_nr) {
//Append filler digit if number is national
if(strlen($receiverNumber)==9){
$nacional=1;
$receiverNumber = $receiverNumber."F";
$network = substr($receiverNumber, 0, 2); //NETWORK code, used to decide the SIM Card to be used
//Check for international flags and set the number type accordingly
}else{
$nacional=0;
if(substr($receiverNumber, 0, 1)=='+'){
$network = substr($receiverNumber, 4, 2); //NETWORK code, used to decide the SIM Card to be used
$receiverNumber = substr($receiverNumber, 1, 12); //remove international indicator
}
else if(substr($receiverNumber, 0, 2)== '00'){
$network = substr($receiverNumber, 5, 2); //NETWORK code, used to decide the SIM Card to be used
$receiverNumber = substr($receiverNumber, 2, 12); //remove international indicator
}
}
/* Flag the network to be used */
switch ($network){
case "92":
$network="TMN";
break;
case "96":
$network="TMN";
break;
case "91":
$network="VODAFONE";
break;
case "93":
$network="OPTIMUS";
break;
}
// Receiver number must be 10 characters long ('national nr' + filler digit) or less than 13 ('351'+'national nr'). (Portugal)
if(strlen($receiverNumber) < 10 || strlen($receiverNumber) > 12) {
// Error, not 10 or over 12 numbers long (Code 1)
$this->setErrorCode(1);
return false;
}
// Message must be 2 characters long at least
if(strlen($message) < 2) {
// Error, message too short (Code 2)
$this->setErrorCode(2);
return false;
}
// Message can't be longer than 153 characters. 3SMS.
if(strlen($message) > 153) {
// Error, message too long (Code 3)
$this->setErrorCode(3);
return false;
}
// Length of servicecenter number (00 = automatically fixed by phone)
$serviceCenterNumberLength = '00';
// SMS-? : 04=sms-deliver(recieve), 11=sms-submit, 01 = dont know but it works, 41 = SMS-SUBMIT + UDH bit (for extended/concatenated SMS)
// You can try to change this if your phone does not work with 01 command try to use 11 command
$smsType = '41';
// TP Message Reference: (placeholder), let the phone set the message reference number itself
$messageRef = '00';
// Number length. If national -> 9, if international -> 12
if($nacional==1){
$numberLength = '09';
}else{
$numberLength = '0C';
}
// Type of phone adress: (81=Unknown=10dec, 91=InternationalFormat, 92=National?)
if($nacional==1){
$numberType = '81';
}else{
$numberType = '91';
}
// Get the PDU version of the number
$number = $this->getNumberAsPDU($receiverNumber);
// TP-PID (Protocol Identifier)
$protocolId = '00';
// TP-DCS (Data coding scheme)
$dataCodingScheme = '00';
// TP-Validity-Period (timestamp), AA=4days expiry, disabled for SonyEricsson support.
// $validityPeriod = 'A0';
// $validityPeriod = 'AA'; // Add this if the PDU command fails
/*user data header information (05 - User Data header info length
* 00 - Information element identifier for a concatenated short message
* 03 - Information element data length
* 00 - Reference number, auto
* 0.$sms_count - total SMS nr
* 0.$msg_nr - current SMS order */
$udhi = '050003000'.$sms_count.'0'.$msg_nr;
// echo 'UDHinfo: '.$udhi."\n";
// Data length of message (in hex format)
$dataLength = $this->strToHexLen($message);
// echo 'DATA LENGHT: '.$dataLength."\n\n";
// Convert message, string > 7bits > 8bits > hex
$hexMessage = $this->bit7tohex($this->strto7bit($message));
// Create the complete PDU string
$pdu = $serviceCenterNumberLength . $smsType . $messageRef . $numberLength .
$numberType . $number . $protocolId . $dataCodingScheme . $dataLength .
$udhi . '20' .$hexMessage;
/*
* Generate the length of var $pdu (pdu/2 minus 1) as pdu format requests
* The -1 is because we don't count the first two characters '00', needed for this command: 'cmgs=24'
*/
$cmgslen = strlen($pdu)/2-1;
// Build data array to return with required information
$data = array();
$data['pdu'] = $pdu;
$data['cmgslen'] = $cmgslen;
$data['rede'] = $network;
// Return the data array with PDU information
return $data;
}
// Generate PDU formatted cellphone number
private function getNumberAsPDU($number) {
// Length of number divided by 2 handle two characters each time
$length = strlen($number)/2;
// Set counter to 1 for strlen
$i = 1;
$pduNumber = '';
// Loop to handle every 2 characters of the phone number. 06 12 34 56 78
while ($i <= $length) {
// Get 2 characters of the complete string depending on the number of the current loop.
// Then reverse these 2 characters and put them in var $pduNumber (06 = 60)
$pduNumber .= strrev(substr($number,$i*2-2,2));
// Counter + 1
$i++;
}
// Return the generated number
return $pduNumber;
}
/* Function to convert ascii character to 8 bits
* Much more efficient than holding a complete ASCII table
* Thanks to Mattijs F.
*/
private function asc2bin($input, $length=8) {
$bin_out = '';
// Loop through every character in the string
for($charCount=0; $charCount < strlen($input); $charCount++) {
$charAscii = ord($input{$charCount}); // ascii value of character
$charBinary = decbin($charAscii); // decimal to binary
$charBinary = str_pad($charBinary, $length, '0', STR_PAD_LEFT);
$bin_out .= $charBinary;
}
// Return complete generated string
return $bin_out;
}
// String to 7 bits array
private function strto7bit($message) {
$message = trim($message);
$length = strlen($message);
$i = 1;
$bitArray = array();
// Loop through every character in the string
while ($i <= $length) {
// Convert this character to a 7 bits value and insert it into the array
$bitArray[] = $this->asc2bin(substr($message ,$i-1,1) ,7);
$i++;
}
// Return array containing 7 bits values
return $bitArray;
}
// Convert 8 bits binary string to hex values (like F2)
private function bit8tohex($bin, $padding=false, $uppercase=true) {
$hex = '';
// Last item for counter (for-loop)
$last = strlen($bin)-1;
// Loop for every item
for($i=0; $i<=$last; $i++) {
$hex += $bin[$last-$i] * pow(2,$i);
}
// Convert from decimal to hexadecimal
$hex = dechex($hex);
// Add a 0 (zero) if there is only 1 value returned, like 'F'
if($padding && strlen($hex) < 2) {
$hex = '0'.$hex;
}
// If we want the output returned as UPPERCASE do this
if($uppercase) {
$hex = strtoupper($hex);
}
// Return the hexadecimal value
return $hex;
}
// Convert 7 bits binary to hex, 7 bits > 8 bits > hex
private function bit7tohex($bits) {
$i = 0;
$hexOutput = '';
$running = true;
// For every 7 bits character array item
while($running) {
if(count($bits)==$i+1) {
$running = false;
}
$value = $bits[$i];
if($value=='') {
$i++;
continue;
}
// Convert the 7 bits value to the 8 bits value
// Merge a part of the next array element and a part of the current one
// Default: new value is current value
$new = $value;
if(key_exists(($i+1), $bits)) {
// There is a next array item so make it 8 bits
$neededChar = 8 - strlen($value);
// Get the char;s from the next array item
$charFromNext = substr($bits[$i+1], -$neededChar);
// Remove used bit's from next array item
$bits[$i+1] = substr($bits[$i+1], 0, strlen($bits[$i+1])-$neededChar);
// New value is characters from next value and current value
$new = $charFromNext.$value;
}
if($new!='') {
// Always make 8 bits
$new = str_pad($new, 8, '0', STR_PAD_LEFT);
// The 8 bits to hex conversion
$hexOutput .= $this->bit8tohex($new, true);
}
$i++;
}
// Return the 7bits->8bits->hexadecimal generated value
return $hexOutput;
}
// String to length in Hex, String > StringLength > Hex
private function strToHexLen($message) {
// Length of the string (message)
$length = strlen($message)+7; //+7 for UDH. the UDH is a total of (number of octets x bit size of octets) 6 x 8 = 48 bits long. Therefore a single bit of padding has to be prepended to the message. The UDH is therefore (bits for UDH/bits per septet) = (48 + 1)/7 = 7 septets in length.
// Hex value of this string length
$hex = dechex($length);
// Length of the hex value
$hexLength = strlen($hex);
// If the hex strng length is lower dan 2
if($hexLength < 2) {
// Add a 0 (zero) before it
$hex = '0'.$hex;
}
// Return the hex value in UPPERCASE characters
return strtoupper($hex);
}
}
?>