/**
* WAP PDU解析 (基本ぱくり)
*
* <p>frameworks/base/telephony/java/com/android/internal/telephony/WapPushOverSms.java
* WapPushOverSms#dispatchWapPdu()
*
* @return true:解析成功
*/
public boolean decode() {
if (dataIndex < 0) {
WspTypeDecoder pduDecoder = new WspTypeDecoder(wapData);
int index = 0;
int transactionId = wapData[index++] & 0xFF;
int pduType = wapData[index++] & 0xFF;
int headerLength = 0;
try {
if ((pduType != WspTypeDecoder.PDU_TYPE_PUSH)
&& (pduType != WspTypeDecoder.PDU_TYPE_CONFIRMED_PUSH)) {
errorMessage = "WapPdu: non-PUSH WAP PDU. Type = " + pduType;
return false;
}
pduDecoder = new WspTypeDecoder(wapData);
/**
* Parse HeaderLen(unsigned integer). From wap-230-wsp-20010705-a section 8.1.2 The maximum
* size of a uintvar is 32 bits. So it will be encoded in no more than 5 octets.
*/
if (pduDecoder.decodeUintvarInteger(index) == false) {
errorMessage = "WapPdu: Header Length error.";
return false;
}
headerLength = (int) pduDecoder.getValue32();
index += pduDecoder.getDecodedDataLength();
int headerStartIndex = index;
/**
* Parse Content-Type. From wap-230-wsp-20010705-a section 8.4.2.24
*
* <p>Content-type-value = Constrained-media | Content-general-form Content-general-form =
* Value-length Media-type Media-type = (Well-known-media | Extension-Media) *(Parameter)
* Value-length = Short-length | (Length-quote Length) Short-length = <Any octet 0-30>
* (octet <= WAP_PDU_SHORT_LENGTH_MAX) Length-quote = <Octet 31> (WAP_PDU_LENGTH_QUOTE)
* Length = Uintvar-integer
*/
if (pduDecoder.decodeContentType(index) == false) {
errorMessage = "WapPdu: Header Content-Type error.";
return false;
}
contentType = pduDecoder.getValueString();
if (contentType == null) {
binaryContentType = (int) pduDecoder.getValue32();
contentType = convertMap(CONTENTTYPES, binaryContentType);
} else {
binaryContentType = convertMap(CONTENTTYPES, contentType);
}
index += pduDecoder.getDecodedDataLength();
dataIndex = headerStartIndex + headerLength;
/**
* Parse X-Wap-Application-Id. From wap-230-wsp-20010705-a section 8.4.2.54
*
* <p>Application-id-value = Uri-value | App-assigned-code App-assigned-code = Integer-value
*/
if (wapData[index] == 0xaf - 0x100) {
if (pduDecoder.decodeXWapApplicationId(index + 1) == false) {
errorMessage = "WapPdu: Header X-Wap-Application-Id error.";
return false;
}
applicationId = pduDecoder.getValueString();
if (applicationId == null) {
binaryApplicationId = (int) pduDecoder.getValue32();
applicationId = convertMap(APPIDS, binaryApplicationId);
} else {
binaryApplicationId = convertMap(APPIDS, applicationId);
}
index += pduDecoder.getDecodedDataLength() + 1;
} else {
errorMessage = "WapPdu: Header X-Wap-Application-Id not present." + wapData[index];
return false;
}
} catch (IndexOutOfBoundsException e) {
errorMessage = "WapPdu: PDU decode error.";
return false;
}
}
decodeBody();
return true;
}