Massive commit, mainly client tag stuff and random id0 and random mac,

red name if not actually in the sim in active speakers for voice.

indra/llimage/llimagemetadatareader.cpp

@@ -0,0 +1,127 @@
+// <edit>
+#include "linden_common.h"
+#include "llimagemetadatareader.h"
+
+LLJ2cParser::LLJ2cParser(U8* data,int data_size)
+{
+    	if(data && data_size)
+	{
+		mData.resize(data_size);
+		memcpy(&(mData[0]), data, data_size);
+		//std::copy(data,data+data_size,mData.begin());
+	}
+	mIter = mData.begin();
+}
+
+U8 LLJ2cParser::nextChar()
+{
+	U8 rtn = 0x00;
+	if(mIter != mData.end())
+	{
+		rtn = (*mIter);
+		mIter++;
+	}
+	return rtn;
+}
+
+std::vector<U8> LLJ2cParser::nextCharArray(int len)
+{
+	std::vector<U8> array;
+	if(len > 0)
+	{
+		array.resize(len);
+		for(S32 i = 0; i < len; i++)
+		{
+			array[i] = nextChar();
+		}
+	}
+	return array;
+}
+
+std::vector<U8> LLJ2cParser::GetNextComment()
+{
+	std::vector<U8> content;
+	while (mIter != mData.end())
+	{
+		U8 marker = nextChar();
+		if (marker == 0xff)
+		{
+		    U8 marker_type = nextChar();
+		    if (marker_type == 0x4f)
+		    {
+			continue;
+		    }
+		    if (marker_type == 0x90)
+		    {
+			//llinfos << "FOUND 0x90" << llendl;
+			break; //return empty vector
+		    }
+		    
+		    if (marker_type == 0x64)
+		    {
+			//llinfos << "FOUND 0x64 COMMENT SECTION" << llendl;
+			S32 len = ((S32)nextChar())*256 + (S32)nextChar();
+		   	if (len > 3) content = nextCharArray(len - 2);
+			return content;
+		    }
+		}
+	}
+	content.clear(); //return empty vector by clear anything there
+	return content;
+}
+
+//static
+std::string LLImageMetaDataReader::ExtractEncodedComment(U8* data,int data_size)
+{
+	LLJ2cParser* parser = new LLJ2cParser(data,data_size);
+	while(1)
+	{
+	    std::vector<U8> comment = parser->GetNextComment();
+	    if (comment.empty()) break; //exit loop
+	    if (comment[1] == 0x00 && comment.size() == 130)
+	    {
+		//llinfos << "FOUND PAYLOAD" << llendl;
+		std::vector<U8> payload(128);
+		S32 i;
+		memcpy(&(payload[0]), &(comment[2]), 128);
+		if (payload[2] == payload[127])
+		{
+		    // emkdu.dll
+		    for (i = 4; i < 128; i += 4)
+		    {
+			payload[i] ^= payload[3];
+			payload[i + 1] ^= payload[1];
+			payload[i + 2] ^= payload[0];
+			payload[i + 3] ^= payload[2];
+		    }
+		}
+		else if (payload[3] == payload[127])
+		{
+		    // emkdu.dll or onyxkdu.dll
+		    for (i = 4; i < 128; i += 4)
+		    {
+			payload[i] ^= payload[2];
+			payload[i + 1] ^= payload[0];
+			payload[i + 2] ^= payload[1];
+			payload[i + 3] ^= payload[3];
+		    }
+		}
+		else
+		{
+		    break;//exit loop
+		}
+		for (i = 4; i < 128; ++i)
+		{
+		    if (payload[i] == 0) break;
+		}
+		std::string result(payload.begin()+4,payload.begin()+i);
+		//llinfos << "FOUND COMMENT: " << result << llendl;
+		delete parser;
+		return result;
+	    }
+	}
+	//end of loop
+	delete parser;
+	return "";
+}
+// </edit>