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Keep track of sold items so we can validate buyback packets

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This commit is contained in:
dongresource 2021-03-09 03:40:23 +01:00
parent 0fbdb1dad2
commit ffe5947925
3 changed files with 71 additions and 33 deletions
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97
src/NPCManager.cpp
View File

@ -121,26 +121,25 @@ void NPCManager::npcVendorBuy(CNSocket* sock, CNPacketData* data) {
sP_CL2FE_REQ_PC_VENDOR_ITEM_BUY* req = (sP_CL2FE_REQ_PC_VENDOR_ITEM_BUY*)data->buf;
Player *plr = PlayerManager::getPlayer(sock);
ItemManager::Item* item = ItemManager::getItemData(req->Item.iID, req->Item.iType);
// prepare fail packet
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL, failResp);
failResp.iErrorCode = 0;
if (item == nullptr) {
ItemManager::Item* itemDat = ItemManager::getItemData(req->Item.iID, req->Item.iType);
if (itemDat == nullptr) {
std::cout << "[WARN] Item id " << req->Item.iID << " with type " << req->Item.iType << " not found (buy)" << std::endl;
// NOTE: VENDOR_ITEM_BUY_FAIL is not actually handled client-side.
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL, failResp);
failResp.iErrorCode = 0;
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL));
return;
}
int itemCost = item->buyPrice * (item->stackSize > 1 ? req->Item.iOpt : 1);
int itemCost = itemDat->buyPrice * (itemDat->stackSize > 1 ? req->Item.iOpt : 1);
int slot = ItemManager::findFreeSlot(plr);
if (itemCost > plr->money || slot == -1) {
// NOTE: VENDOR_ITEM_BUY_FAIL is not actually handled client-side.
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL, failResp);
failResp.iErrorCode = 0;
if (itemCost > plr->money || slot == -1 || req->Item.iOpt > itemDat->stackSize) {
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_BUY_FAIL));
return;
}
// if vehicle
if (req->Item.iType == 10) {
// set time limit: current time + 7days
@ -184,14 +183,14 @@ void NPCManager::npcVendorSell(CNSocket* sock, CNPacketData* data) {
sItemBase* item = &plr->Inven[req->iInvenSlotNum];
ItemManager::Item* itemData = ItemManager::getItemData(item->iID, item->iType);
if (itemData == nullptr || !itemData->sellable || plr->Inven[req->iInvenSlotNum].iOpt < req->iItemCnt) { // sanity + sellable check
if (itemData == nullptr || !itemData->sellable || item->iOpt < req->iItemCnt) { // sanity + sellable check
std::cout << "[WARN] Item id " << item->iID << " with type " << item->iType << " not found (sell)" << std::endl;
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_SELL_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_SELL_FAIL));
return;
}
// fail to sell croc-potted items
if (plr->Inven[req->iInvenSlotNum].iOpt >= 1 << 16) {
if (item->iOpt >= 1 << 16) {
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_SELL_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_SELL_FAIL));
return;
}
@ -201,22 +200,25 @@ void NPCManager::npcVendorSell(CNSocket* sock, CNPacketData* data) {
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_SELL_SUCC, resp);
int sellValue = itemData->sellPrice * req->iItemCnt;
// increment taros
plr->money = plr->money + sellValue;
plr->money += itemData->sellPrice * req->iItemCnt;
// modify item
if (plr->Inven[req->iInvenSlotNum].iOpt - req->iItemCnt > 0) { // selling part of a stack
if (item->iOpt - req->iItemCnt > 0) { // selling part of a stack
item->iOpt -= req->iItemCnt;
original.iOpt = req->iItemCnt;
} else { // selling entire slot
item->iID = 0;
item->iOpt = 0;
item->iType = 0;
item->iTimeLimit = 0;
// make sure it's fully zeroed, even the padding and non-104 members
memset(item, 0, sizeof(*item));
}
// add to buyback list
plr->buyback->push_back(original);
// forget oldest member if there's more than 5
if (plr->buyback->size() > 5)
plr->buyback->erase(plr->buyback->begin());
//std::cout << (int)plr->buyback->size() << " items in buyback\n";
// response parameters
resp.iInvenSlotNum = req->iInvenSlotNum;
resp.iCandy = plr->money;
@ -233,24 +235,57 @@ void NPCManager::npcVendorBuyback(CNSocket* sock, CNPacketData* data) {
sP_CL2FE_REQ_PC_VENDOR_ITEM_RESTORE_BUY* req = (sP_CL2FE_REQ_PC_VENDOR_ITEM_RESTORE_BUY*)data->buf;
Player* plr = PlayerManager::getPlayer(sock);
ItemManager::Item* item = ItemManager::getItemData(req->Item.iID, req->Item.iType);
if (item == nullptr) {
std::cout << "[WARN] Item id " << req->Item.iID << " with type " << req->Item.iType << " not found (rebuy)" << std::endl;
// NOTE: VENDOR_ITEM_BUY_FAIL is not actually handled client-side.
// prepare fail packet
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL, failResp);
failResp.iErrorCode = 0;
//std::cout << "buying back from index " << (int)req->iListID << " into " << (int)req->iInvenSlotNum <<
// " from " << (int)req->iNPC_ID << " (vendor = " << (int)req->iVendorID << ")\n";
int idx = req->iListID - 1;
// sanity check
if (idx < 0 || idx >= plr->buyback->size()) {
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL));
return;
}
// get the item out of the buyback list
sItemBase item = (*plr->buyback)[idx];
/*
* NOTE: The client sends the index of the exact item the user clicked on.
* We then operate on that item, but we remove the *first* identical item
* from the buyback list, instead of the one at the supplied index.
*
* This was originally a mistake on my part, but it turns out the client
* does the exact same thing, so this *is* the correct thing to do to keep
* them in sync.
*/
for (auto it = plr->buyback->begin(); it != plr->buyback->end(); it++) {
/*
* XXX: we really need a standard item comparison function that
* will work properly across all builds (ex. with iSerial)
*/
if (it->iType == item.iType && it->iID == item.iID && it->iOpt == item.iOpt
&& it->iTimeLimit == item.iTimeLimit) {
plr->buyback->erase(it);
break;
}
}
//std::cout << (int)plr->buyback->size() << " items in buyback\n";
ItemManager::Item* itemDat = ItemManager::getItemData(item.iID, item.iType);
if (itemDat == nullptr) {
std::cout << "[WARN] Item id " << item.iID << " with type " << item.iType << " not found (rebuy)" << std::endl;
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL));
return;
}
// sell price is used on rebuy. ternary identifies stacked items
int itemCost = item->sellPrice * (item->stackSize > 1 ? req->Item.iOpt : 1);
int itemCost = itemDat->sellPrice * (itemDat->stackSize > 1 ? item.iOpt : 1);
int slot = ItemManager::findFreeSlot(plr);
if (itemCost > plr->money || slot == -1) {
// NOTE: VENDOR_ITEM_BUY_FAIL is not actually handled client-side.
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL, failResp);
failResp.iErrorCode = 0;
sock->sendPacket((void*)&failResp, P_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_FAIL));
return;
}
@ -261,13 +296,13 @@ void NPCManager::npcVendorBuyback(CNSocket* sock, CNPacketData* data) {
}
plr->money = plr->money - itemCost;
plr->Inven[slot] = req->Item;
plr->Inven[slot] = item;
INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_SUCC, resp);
// response parameters
resp.iCandy = plr->money;
resp.iInvenSlotNum = slot;
resp.Item = req->Item;
resp.Item = item;
sock->sendPacket((void*)&resp, P_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_SUCC, sizeof(sP_FE2CL_REP_PC_VENDOR_ITEM_RESTORE_BUY_SUCC));
}

3
src/Player.hpp
View File

@ -84,9 +84,10 @@ struct Player {
uint64_t iFirstUseFlag[2];
ChunkPos chunkPos;
std::set<Chunk*>* viewableChunks;
std::set<Chunk*> *viewableChunks;
time_t lastHeartbeat;
int suspicionRating;
time_t lastShot;
std::vector<sItemBase> *buyback;
};

2
src/PlayerManager.cpp
View File

@ -63,6 +63,7 @@ void PlayerManager::addPlayer(CNSocket* key, Player plr) {
p->chunkPos = std::make_tuple(0, 0, 0);
p->viewableChunks = new std::set<Chunk*>();
p->lastHeartbeat = 0;
p->buyback = new std::vector<sItemBase>();
std::cout << getPlayerName(p) << " has joined!" << std::endl;
std::cout << players.size() << " players" << std::endl;
@ -89,6 +90,7 @@ void PlayerManager::removePlayer(CNSocket* key) {
std::cout << getPlayerName(plr) << " has left!" << std::endl;
delete plr->buyback;
delete plr->viewableChunks;
delete plr;
players.erase(key);