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Old 02-12-2014, 09:12 PM
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Demi-God
 
Join Date: Jan 2002
Posts: 1,290
Default OP_Emote client crash fix

Code:
void Client::Handle_OP_Emote(const EQApplicationPacket *app)
{
	if(app->size != sizeof(Emote_Struct)) {
		LogFile->write(EQEMuLog::Error, "Received invalid sized "
			"OP_Emote: got %d, expected %d", app->size,
			sizeof(Emote_Struct));
		DumpPacket(app);
		return;
	}

	// Calculate new packet dimensions
	Emote_Struct* in	= (Emote_Struct*)app->pBuffer;
	const char* name	= GetName();
	uint32 len_name		= strlen(name);
	uint32 len_msg		= strnlen(in->message,958);
	uint32 len_packet	= sizeof(in->unknown01) + len_name
		+ len_msg + 1;

	// Construct outgoing packet
	EQApplicationPacket* outapp = new EQApplicationPacket(OP_Emote, len_packet);
	Emote_Struct* out = (Emote_Struct*)outapp->pBuffer;
	out->unknown01 = in->unknown01;
	memcpy(out->message, name, len_name);

	memcpy(&out->message[len_name], in->message, len_msg);

	out->message[len_name] = 0x20;
	out->message[len_name + len_msg - 1] = '\0';

	entity_list.QueueCloseClients(this, outapp, true, 100,0,true,FILTER_SOCIALS);

	safe_delete(outapp);
	return;
}
For other char arrays from client:

Code:
int Client::sanitizeCharArray(char* inArray, char* outData, int maxLength)
{
	int length = strnlen(inArray,maxLength);
	strncpy(outData,inArray,length);
	outData[length] = '\0';
	return length;
}
example:


char targetName[64];
int targetLength = sanitizeCharArray(c->name, (char*)targetName, 64);

Opcodes that have char arrays of concern:

Handle_OP_Consent
Handle_OP_ConsentDeny
Handle_OP_Surname
Handle_OP_ChannelMessage
Handle_OP_GMLastName
Handle_OP_LFGCommand
Handle_OP_GroupInvite2
Handle_OP_GroupCancelInvite
Handle_OP_InspectAnswer
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