Data verification utils, not in use yet. Also added ability for lua packet to bypass the translation layer (dangerous) if a writer so desires (useful for quickly trying packet stuff)

common/data_verification.h

@@ -0,0 +1,43 @@
+/*	EQEMu: Everquest Server Emulator
+	Copyright (C) 2001-2014 EQEMu Development Team (http://eqemulator.net)
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; version 2 of the License.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY except by those people which sell it, which
+	are required to give you total support for your newly bought product;
+	without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+	A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+#ifndef COMMON_DATA_VERIFICATION_H
+#define COMMON_DATA_VERIFICATION_H
+
+#include <algorithm>
+
+namespace EQEmu
+{
+
+template <typename T>
+T Clamp(const T& value, const T& lower, const T& upper) {
+	return std::max(lower, std::min(value, upper));
+}
+
+template <typename T>
+T ClampLower(const T& value, const T& lower) {
+	return std::max(lower, value);
+}
+
+template <typename T>
+T ClampUpper(const T& value, const T& upper) {
+	return std::min(value, upper);
+}
+
+}
+
+#endif

common/eq_packet.h

@@ -97,16 +97,15 @@ protected:
 };
 
 class EQApplicationPacket : public EQPacket {
-//	friend class EQProtocolPacket;
 	friend class EQStream;
 public:
-	EQApplicationPacket() : EQPacket(OP_Unknown,nullptr,0)
+	EQApplicationPacket() : EQPacket(OP_Unknown, nullptr, 0), opcode_bypass(0)
 		{ app_opcode_size = GetExecutablePlatform() == ExePlatformUCS ? 1 : 2; }
-	EQApplicationPacket(const EmuOpcode op) : EQPacket(op,nullptr,0)
+	EQApplicationPacket(const EmuOpcode op) : EQPacket(op, nullptr, 0), opcode_bypass(0)
 		{ app_opcode_size = GetExecutablePlatform() == ExePlatformUCS ? 1 : 2; }
-	EQApplicationPacket(const EmuOpcode op, const uint32 len) : EQPacket(op,nullptr,len)
+	EQApplicationPacket(const EmuOpcode op, const uint32 len) : EQPacket(op, nullptr, len), opcode_bypass(0)
 		{ app_opcode_size = GetExecutablePlatform() == ExePlatformUCS ? 1 : 2; }
-	EQApplicationPacket(const EmuOpcode op, const unsigned char *buf, const uint32 len) : EQPacket(op,buf,len)
+	EQApplicationPacket(const EmuOpcode op, const unsigned char *buf, const uint32 len) : EQPacket(op, buf, len), opcode_bypass(0)
 		{ app_opcode_size = GetExecutablePlatform() == ExePlatformUCS ? 1 : 2; }
 	bool combine(const EQApplicationPacket *rhs);
 	uint32 serialize (uint16 opcode, unsigned char *dest) const;
@@ -119,12 +118,16 @@ public:
 	virtual void DumpRawHeader(uint16 seq=0xffff, FILE *to = stdout) const;
 	virtual void DumpRawHeaderNoTime(uint16 seq=0xffff, FILE *to = stdout) const;
 
+	uint16 GetOpcodeBypass() { return opcode_bypass; }
+	void SetOpcodeBypass(uint16 v) { opcode_bypass = v; }
+
 protected:
 
 	uint8 app_opcode_size;
+	uint16 opcode_bypass;
 private:
 
-	EQApplicationPacket(const EQApplicationPacket &p) : EQPacket(p.emu_opcode, p.pBuffer, p.size) { app_opcode_size = p.app_opcode_size; }
+	EQApplicationPacket(const EQApplicationPacket &p) : EQPacket(p.emu_opcode, p.pBuffer, p.size), opcode_bypass(p.opcode_bypass) { app_opcode_size = p.app_opcode_size; }
 
 };
 

common/eq_stream.cpp

@@ -532,9 +532,12 @@ void EQStream::FastQueuePacket(EQApplicationPacket **p, bool ack_req)
 		return;
 	}
 
-	uint16 opcode = (*OpMgr)->EmuToEQ(pack->emu_opcode);
-
-	//_log(NET__APP_TRACE, "Queueing %sacked packet with opcode 0x%x (%s) and length %d", ack_req?"":"non-", opcode, OpcodeManager::EmuToName(pack->emu_opcode), pack->size);
+	uint16 opcode = 0;
+	if(pack->GetOpcodeBypass() != 0) {
+		opcode = pack->GetOpcodeBypass();
+	} else {
+		opcode = (*OpMgr)->EmuToEQ(pack->emu_opcode);
+	}
 
 	if (!ack_req) {
 		NonSequencedPush(new EQProtocolPacket(opcode, pack->pBuffer, pack->size));
@@ -877,43 +880,6 @@ sockaddr_in address;
 	AddBytesSent(length);
 }
 
-/*
-commented out since im not sure theres a lot of merit in it.
-Really it was bitterness towards allocating a 2k buffer on the stack each call.
-Im sure the thought was client side, but even then, they will
-likely need a whole thread to call this method, in which case, they should
-supply the buffer so we dont re-allocate it each time.
-EQProtocolPacket *EQStream::Read(int eq_fd, sockaddr_in *from)
-{
-int socklen;
-int length=0;
-EQProtocolPacket *p=nullptr;
-char temp[15];
-
-	socklen=sizeof(sockaddr);
-#ifdef _WINDOWS
-	length=recvfrom(eq_fd, (char *)_tempBuffer, 2048, 0, (struct sockaddr*)from, (int *)&socklen);
-#else
-	length=recvfrom(eq_fd, _tempBuffer, 2048, 0, (struct sockaddr*)from, (socklen_t *)&socklen);
-#endif
-
-	if (length>=2) {
-		p=new EQProtocolPacket(_tempBuffer[1],&_tempBuffer[2],length-2);
-
-		uint32 ip=from->sin_addr.s_addr;
-		sprintf(temp,"%d.%d.%d.%d:%d",
-			*(unsigned char *)&ip,
-			*((unsigned char *)&ip+1),
-			*((unsigned char *)&ip+2),
-			*((unsigned char *)&ip+3),
-			ntohs(from->sin_port));
-		//std::cout << timestamp() << "Data from: " << temp << " OpCode 0x" << std::hex << std::setw(2) << std::setfill('0') << (int)p->opcode << std::dec << std::endl;
-		//dump_message(p->pBuffer,p->size,timestamp());
-
-	}
-	return p;
-}*/
-
 void EQStream::SendSessionResponse()
 {
 EQProtocolPacket *out=new EQProtocolPacket(OP_SessionResponse,nullptr,sizeof(SessionResponse));
@@ -1101,14 +1067,6 @@ EQProtocolPacket *p=nullptr;
 		SequencedQueue.clear();
 	}
 	MOutboundQueue.unlock();
-
-/*if(uint16(SequencedBase + SequencedQueue.size()) != NextOutSeq) {
-	_log(NET__ERROR, _L "Out-bound Invalid Sequenced queue: BS %d + SQ %d != NOS %d" __L, SequencedBase, SequencedQueue.size(), NextOutSeq);
-}
-if(NextSequencedSend > SequencedQueue.size()) {
-	_log(NET__ERROR, _L "Out-bound Next Send Sequence is beyond the end of the queue NSS %d > SQ %d" __L, NextSequencedSend, SequencedQueue.size());
-}*/
-	//NOTE: we prolly want to reset counters if we are stupposed to do anything after this.
 }
 
 void EQStream::PacketQueueClear()

common/struct_strategy.cpp

@@ -17,6 +17,11 @@ StructStrategy::StructStrategy() {
 }
 
 void StructStrategy::Encode(EQApplicationPacket **p, EQStream *dest, bool ack_req) const {
+	if((*p)->GetOpcodeBypass() != 0) {
+		PassEncoder(p, dest, ack_req);
+		return;
+	}
+
 	EmuOpcode op = (*p)->GetOpcode();
 	Encoder proc = encoders[op];
 	proc(p, dest, ack_req);