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Diffstat (limited to 'src/map/trade.c')
| -rw-r--r-- | src/map/trade.c | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/src/map/trade.c b/src/map/trade.c new file mode 100644 index 000000000..0d01b54a6 --- /dev/null +++ b/src/map/trade.c @@ -0,0 +1,610 @@ +// Copyright (c) Athena Dev Teams - Licensed under GNU GPL +// For more information, see LICENCE in the main folder + +#include "../common/nullpo.h" +#include "../common/socket.h" +#include "clif.h" +#include "itemdb.h" +#include "map.h" +#include "path.h" +#include "trade.h" +#include "pc.h" +#include "npc.h" +#include "battle.h" +#include "chrif.h" +#include "storage.h" +#include "intif.h" +#include "atcommand.h" +#include "log.h" + +#include <stdio.h> +#include <string.h> + + +//Max distance from traders to enable a trade to take place. +#define TRADE_DISTANCE 2 + +/*========================================== + * Initiates a trade request. + *------------------------------------------*/ +void trade_traderequest(struct map_session_data *sd, struct map_session_data *target_sd) +{ + nullpo_retv(sd); + + if (map[sd->bl.m].flag.notrade) { + clif_displaymessage (sd->fd, msg_txt(272)); + return; //Can't trade in notrade mapflag maps. + } + + if (target_sd == NULL || sd == target_sd) { + clif_tradestart(sd, 1); // character does not exist + return; + } + + if (target_sd->npc_id) + { //Trade fails if you are using an NPC. + clif_tradestart(sd, 2); + return; + } + + if (!battle_config.invite_request_check) { + if (target_sd->guild_invite > 0 || target_sd->party_invite > 0 || target_sd->adopt_invite) { + clif_tradestart(sd, 2); + return; + } + } + + if ( sd->trade_partner != 0 ) { // If a character tries to trade to another one then cancel the previous one + struct map_session_data *previous_sd = map_id2sd(sd->trade_partner); + if( previous_sd ){ + previous_sd->trade_partner = 0; + clif_tradecancelled(previous_sd); + } // Once cancelled then continue to the new one. + sd->trade_partner = 0; + clif_tradecancelled(sd); + } + + if (target_sd->trade_partner != 0) { + clif_tradestart(sd, 2); // person is in another trade + return; + } + + if (!pc_can_give_items(sd) || !pc_can_give_items(target_sd)) //check if both GMs are allowed to trade + { + clif_displaymessage(sd->fd, msg_txt(246)); + clif_tradestart(sd, 2); // GM is not allowed to trade + return; + } + + // Players can not request trade from far away, unless they are allowed to use @trade. + if (!pc_can_use_command(sd, "trade", COMMAND_ATCOMMAND) && + (sd->bl.m != target_sd->bl.m || !check_distance_bl(&sd->bl, &target_sd->bl, TRADE_DISTANCE))) { + clif_tradestart(sd, 0); // too far + return ; + } + + target_sd->trade_partner = sd->status.account_id; + sd->trade_partner = target_sd->status.account_id; + clif_traderequest(target_sd, sd->status.name); +} + +/*========================================== + * Reply to a trade-request. + * Type values: + * 0: Char is too far + * 1: Character does not exist + * 2: Trade failed + * 3: Accept + * 4: Cancel + * Weird enough, the client should only send 3/4 + * and the server is the one that can reply 0~2 + *------------------------------------------*/ +void trade_tradeack(struct map_session_data *sd, int type) +{ + struct map_session_data *tsd; + nullpo_retv(sd); + + if (sd->state.trading || !sd->trade_partner) + return; //Already trading or no partner set. + + if ((tsd = map_id2sd(sd->trade_partner)) == NULL) { + clif_tradestart(sd, 1); // character does not exist + sd->trade_partner=0; + return; + } + + if (tsd->state.trading || tsd->trade_partner != sd->bl.id) + { + clif_tradestart(sd, 2); + sd->trade_partner=0; + return; //Already trading or wrong partner. + } + + if (type == 4) { // Cancel + clif_tradestart(tsd, type); + clif_tradestart(sd, type); + sd->state.deal_locked = 0; + sd->trade_partner = 0; + tsd->state.deal_locked = 0; + tsd->trade_partner = 0; + return; + } + + if (type != 3) + return; //If client didn't send accept, it's a broken packet? + + // Players can not request trade from far away, unless they are allowed to use @trade. + // Check here as well since the original character could had warped. + if (!pc_can_use_command(sd, "trade", COMMAND_ATCOMMAND) && + (sd->bl.m != tsd->bl.m || !check_distance_bl(&sd->bl, &tsd->bl, TRADE_DISTANCE))) { + clif_tradestart(sd, 0); // too far + sd->trade_partner=0; + tsd->trade_partner = 0; + return; + } + + //Check if you can start trade. + if (sd->npc_id || sd->state.vending || sd->state.buyingstore || sd->state.storage_flag || + tsd->npc_id || tsd->state.vending || tsd->state.buyingstore || tsd->state.storage_flag) + { //Fail + clif_tradestart(sd, 2); + clif_tradestart(tsd, 2); + sd->state.deal_locked = 0; + sd->trade_partner = 0; + tsd->state.deal_locked = 0; + tsd->trade_partner = 0; + return; + } + + //Initiate trade + sd->state.trading = 1; + tsd->state.trading = 1; + memset(&sd->deal, 0, sizeof(sd->deal)); + memset(&tsd->deal, 0, sizeof(tsd->deal)); + clif_tradestart(tsd, type); + clif_tradestart(sd, type); +} + +/*========================================== + * Check here hacker for duplicate item in trade + * normal client refuse to have 2 same types of item (except equipment) in same trade window + * normal client authorise only no equiped item and only from inventory + *------------------------------------------*/ +int impossible_trade_check(struct map_session_data *sd) +{ + struct item inventory[MAX_INVENTORY]; + char message_to_gm[200]; + int i, index; + + nullpo_retr(1, sd); + + if(sd->deal.zeny > sd->status.zeny) + { + pc_setglobalreg(sd,"ZENY_HACKER",1); + return -1; + } + + // get inventory of player + memcpy(&inventory, &sd->status.inventory, sizeof(struct item) * MAX_INVENTORY); + + // remove this part: arrows can be trade and equiped + // re-added! [celest] + // remove equiped items (they can not be trade) + for (i = 0; i < MAX_INVENTORY; i++) + if (inventory[i].nameid > 0 && inventory[i].equip && !(inventory[i].equip & EQP_AMMO)) + memset(&inventory[i], 0, sizeof(struct item)); + + // check items in player inventory + for(i = 0; i < 10; i++) { + if (!sd->deal.item[i].amount) + continue; + index = sd->deal.item[i].index; + if (inventory[index].amount < sd->deal.item[i].amount) + { // if more than the player have -> hack + sprintf(message_to_gm, msg_txt(538), sd->status.name, sd->status.account_id); // Hack on trade: character '%s' (account: %d) try to trade more items that he has. + intif_wis_message_to_gm(wisp_server_name, PC_PERM_RECEIVE_HACK_INFO, message_to_gm); + sprintf(message_to_gm, msg_txt(539), inventory[index].amount, inventory[index].nameid, sd->deal.item[i].amount); // This player has %d of a kind of item (id: %d), and try to trade %d of them. + intif_wis_message_to_gm(wisp_server_name, PC_PERM_RECEIVE_HACK_INFO, message_to_gm); + // if we block people + if (battle_config.ban_hack_trade < 0) { + chrif_char_ask_name(-1, sd->status.name, 1, 0, 0, 0, 0, 0, 0); // type: 1 - block + set_eof(sd->fd); // forced to disconnect because of the hack + // message about the ban + strcpy(message_to_gm, msg_txt(540)); // This player has been definitively blocked. + // if we ban people + } else if (battle_config.ban_hack_trade > 0) { + chrif_char_ask_name(-1, sd->status.name, 2, 0, 0, 0, 0, battle_config.ban_hack_trade, 0); // type: 2 - ban (year, month, day, hour, minute, second) + set_eof(sd->fd); // forced to disconnect because of the hack + // message about the ban + sprintf(message_to_gm, msg_txt(507), battle_config.ban_hack_trade); // This player has been banned for %d minute(s). + } else + // message about the ban + strcpy(message_to_gm, msg_txt(508)); // This player hasn't been banned (Ban option is disabled). + + intif_wis_message_to_gm(wisp_server_name, PC_PERM_RECEIVE_HACK_INFO, message_to_gm); + return 1; + } + inventory[index].amount -= sd->deal.item[i].amount; // remove item from inventory + } + return 0; +} + +/*========================================== + * Checks if trade is possible (against zeny limits, inventory limits, etc) + *------------------------------------------*/ +int trade_check(struct map_session_data *sd, struct map_session_data *tsd) +{ + struct item inventory[MAX_INVENTORY]; + struct item inventory2[MAX_INVENTORY]; + struct item_data *data; + int trade_i, i, n; + short amount; + + // check zenys value against hackers (Zeny was already checked on time of adding, but you never know when you lost some zeny since then. + if(sd->deal.zeny > sd->status.zeny || (tsd->status.zeny > MAX_ZENY - sd->deal.zeny)) + return 0; + if(tsd->deal.zeny > tsd->status.zeny || (sd->status.zeny > MAX_ZENY - tsd->deal.zeny)) + return 0; + + // get inventory of player + memcpy(&inventory, &sd->status.inventory, sizeof(struct item) * MAX_INVENTORY); + memcpy(&inventory2, &tsd->status.inventory, sizeof(struct item) * MAX_INVENTORY); + + // check free slot in both inventory + for(trade_i = 0; trade_i < 10; trade_i++) { + amount = sd->deal.item[trade_i].amount; + if (amount) { + n = sd->deal.item[trade_i].index; + if (amount > inventory[n].amount) + return 0; //qty Exploit? + + data = itemdb_search(inventory[n].nameid); + i = MAX_INVENTORY; + if (itemdb_isstackable2(data)) { //Stackable item. + for(i = 0; i < MAX_INVENTORY; i++) + if (inventory2[i].nameid == inventory[n].nameid && + inventory2[i].card[0] == inventory[n].card[0] && inventory2[i].card[1] == inventory[n].card[1] && + inventory2[i].card[2] == inventory[n].card[2] && inventory2[i].card[3] == inventory[n].card[3]) { + if (inventory2[i].amount + amount > MAX_AMOUNT) + return 0; + inventory2[i].amount += amount; + inventory[n].amount -= amount; + break; + } + } + + if (i == MAX_INVENTORY) {// look for an empty slot. + for(i = 0; i < MAX_INVENTORY && inventory2[i].nameid; i++); + if (i == MAX_INVENTORY) + return 0; + memcpy(&inventory2[i], &inventory[n], sizeof(struct item)); + inventory2[i].amount = amount; + inventory[n].amount -= amount; + } + } + amount = tsd->deal.item[trade_i].amount; + if (!amount) + continue; + n = tsd->deal.item[trade_i].index; + if (amount > inventory2[n].amount) + return 0; + // search if it's possible to add item (for full inventory) + data = itemdb_search(inventory2[n].nameid); + i = MAX_INVENTORY; + if (itemdb_isstackable2(data)) { + for(i = 0; i < MAX_INVENTORY; i++) + if (inventory[i].nameid == inventory2[n].nameid && + inventory[i].card[0] == inventory2[n].card[0] && inventory[i].card[1] == inventory2[n].card[1] && + inventory[i].card[2] == inventory2[n].card[2] && inventory[i].card[3] == inventory2[n].card[3]) { + if (inventory[i].amount + amount > MAX_AMOUNT) + return 0; + inventory[i].amount += amount; + inventory2[n].amount -= amount; + break; + } + } + if (i == MAX_INVENTORY) { + for(i = 0; i < MAX_INVENTORY && inventory[i].nameid; i++); + if (i == MAX_INVENTORY) + return 0; + memcpy(&inventory[i], &inventory2[n], sizeof(struct item)); + inventory[i].amount = amount; + inventory2[n].amount -= amount; + } + } + + return 1; +} + +/*========================================== + * Adds an item/qty to the trade window + *------------------------------------------*/ +void trade_tradeadditem(struct map_session_data *sd, short index, short amount) +{ + struct map_session_data *target_sd; + struct item *item; + int trade_i, trade_weight; + int src_lv, dst_lv; + + nullpo_retv(sd); + if( !sd->state.trading || sd->state.deal_locked > 0 ) + return; //Can't add stuff. + + if( (target_sd = map_id2sd(sd->trade_partner)) == NULL ) + { + trade_tradecancel(sd); + return; + } + + if( amount == 0 ) + { //Why do this.. ~.~ just send an ack, the item won't display on the trade window. + clif_tradeitemok(sd, index, 0); + return; + } + + index -= 2; // 0 is for zeny, 1 is unknown. Gravity, go figure... + + //Item checks... + if( index < 0 || index >= MAX_INVENTORY ) + return; + if( amount < 0 || amount > sd->status.inventory[index].amount ) + return; + + item = &sd->status.inventory[index]; + src_lv = pc_get_group_level(sd); + dst_lv = pc_get_group_level(target_sd); + if( !itemdb_cantrade(item, src_lv, dst_lv) && //Can't trade + (pc_get_partner(sd) != target_sd || !itemdb_canpartnertrade(item, src_lv, dst_lv)) ) //Can't partner-trade + { + clif_displaymessage (sd->fd, msg_txt(260)); + clif_tradeitemok(sd, index+2, 1); + return; + } + + if( item->expire_time ) + { // Rental System + clif_displaymessage (sd->fd, msg_txt(260)); + clif_tradeitemok(sd, index+2, 1); + return; + } + + //Locate a trade position + ARR_FIND( 0, 10, trade_i, sd->deal.item[trade_i].index == index || sd->deal.item[trade_i].amount == 0 ); + if( trade_i == 10 ) //No space left + { + clif_tradeitemok(sd, index+2, 1); + return; + } + + trade_weight = sd->inventory_data[index]->weight * amount; + if( target_sd->weight + sd->deal.weight + trade_weight > target_sd->max_weight ) + { //fail to add item -- the player was over weighted. + clif_tradeitemok(sd, index+2, 1); + return; + } + + if( sd->deal.item[trade_i].index == index ) + { //The same item as before is being readjusted. + if( sd->deal.item[trade_i].amount + amount > sd->status.inventory[index].amount ) + { //packet deal exploit check + amount = sd->status.inventory[index].amount - sd->deal.item[trade_i].amount; + trade_weight = sd->inventory_data[index]->weight * amount; + } + sd->deal.item[trade_i].amount += amount; + } + else + { //New deal item + sd->deal.item[trade_i].index = index; + sd->deal.item[trade_i].amount = amount; + } + sd->deal.weight += trade_weight; + + clif_tradeitemok(sd, index+2, 0); // Return the index as it was received + clif_tradeadditem(sd, target_sd, index+2, amount); +} + +/*========================================== + * Adds the specified amount of zeny to the trade window + *------------------------------------------*/ +void trade_tradeaddzeny(struct map_session_data* sd, int amount) +{ + struct map_session_data* target_sd; + nullpo_retv(sd); + + if( !sd->state.trading || sd->state.deal_locked > 0 ) + return; //Can't add stuff. + + if( (target_sd = map_id2sd(sd->trade_partner)) == NULL ) + { + trade_tradecancel(sd); + return; + } + + if( amount < 0 || amount > sd->status.zeny || amount > MAX_ZENY - target_sd->status.zeny ) + { // invalid values, no appropriate packet for it => abort + trade_tradecancel(sd); + return; + } + + sd->deal.zeny = amount; + clif_tradeadditem(sd, target_sd, 0, amount); +} + +/*========================================== + * 'Ok' button on the trade window is pressed. + *------------------------------------------*/ +void trade_tradeok(struct map_session_data *sd) +{ + struct map_session_data *target_sd; + + if(sd->state.deal_locked || !sd->state.trading) + return; + + if ((target_sd = map_id2sd(sd->trade_partner)) == NULL) { + trade_tradecancel(sd); + return; + } + sd->state.deal_locked = 1; + clif_tradeitemok(sd, 0, 0); + clif_tradedeal_lock(sd, 0); + clif_tradedeal_lock(target_sd, 1); +} + +/*========================================== + * 'Cancel' is pressed. (or trade was force-cancelled by the code) + *------------------------------------------*/ +void trade_tradecancel(struct map_session_data *sd) +{ + struct map_session_data *target_sd; + int trade_i; + + target_sd = map_id2sd(sd->trade_partner); + + if(!sd->state.trading) + { // Not trade acepted + if( target_sd ) { + target_sd->trade_partner = 0; + clif_tradecancelled(target_sd); + } + sd->trade_partner = 0; + clif_tradecancelled(sd); + return; + } + + for(trade_i = 0; trade_i < 10; trade_i++) { // give items back (only virtual) + if (!sd->deal.item[trade_i].amount) + continue; + clif_additem(sd, sd->deal.item[trade_i].index, sd->deal.item[trade_i].amount, 0); + sd->deal.item[trade_i].index = 0; + sd->deal.item[trade_i].amount = 0; + } + if (sd->deal.zeny) { + clif_updatestatus(sd, SP_ZENY); + sd->deal.zeny = 0; + } + + sd->state.deal_locked = 0; + sd->state.trading = 0; + sd->trade_partner = 0; + clif_tradecancelled(sd); + + if (!target_sd) + return; + + for(trade_i = 0; trade_i < 10; trade_i++) { // give items back (only virtual) + if (!target_sd->deal.item[trade_i].amount) + continue; + clif_additem(target_sd, target_sd->deal.item[trade_i].index, target_sd->deal.item[trade_i].amount, 0); + target_sd->deal.item[trade_i].index = 0; + target_sd->deal.item[trade_i].amount = 0; + } + + if (target_sd->deal.zeny) { + clif_updatestatus(target_sd, SP_ZENY); + target_sd->deal.zeny = 0; + } + target_sd->state.deal_locked = 0; + target_sd->trade_partner = 0; + target_sd->state.trading = 0; + clif_tradecancelled(target_sd); +} + +/*========================================== + * lock sd and tsd trade data, execute the trade, clear, then save players + *------------------------------------------*/ +void trade_tradecommit(struct map_session_data *sd) +{ + struct map_session_data *tsd; + int trade_i; + int flag; + + if (!sd->state.trading || !sd->state.deal_locked) //Locked should be 1 (pressed ok) before you can press trade. + return; + + if ((tsd = map_id2sd(sd->trade_partner)) == NULL) { + trade_tradecancel(sd); + return; + } + + sd->state.deal_locked = 2; + + if (tsd->state.deal_locked < 2) + return; //Not yet time for trading. + + //Now is a good time (to save on resources) to check that the trade can indeed be made and it's not exploitable. + // check exploit (trade more items that you have) + if (impossible_trade_check(sd)) { + trade_tradecancel(sd); + return; + } + // check exploit (trade more items that you have) + if (impossible_trade_check(tsd)) { + trade_tradecancel(tsd); + return; + } + // check for full inventory (can not add traded items) + if (!trade_check(sd,tsd)) { // check the both players + trade_tradecancel(sd); + return; + } + + // trade is accepted and correct. + for( trade_i = 0; trade_i < 10; trade_i++ ) + { + int n; + if (sd->deal.item[trade_i].amount) + { + n = sd->deal.item[trade_i].index; + + flag = pc_additem(tsd, &sd->status.inventory[n], sd->deal.item[trade_i].amount,LOG_TYPE_TRADE); + if (flag == 0) + pc_delitem(sd, n, sd->deal.item[trade_i].amount, 1, 6, LOG_TYPE_TRADE); + else + clif_additem(sd, n, sd->deal.item[trade_i].amount, 0); + sd->deal.item[trade_i].index = 0; + sd->deal.item[trade_i].amount = 0; + } + if (tsd->deal.item[trade_i].amount) + { + n = tsd->deal.item[trade_i].index; + + flag = pc_additem(sd, &tsd->status.inventory[n], tsd->deal.item[trade_i].amount,LOG_TYPE_TRADE); + if (flag == 0) + pc_delitem(tsd, n, tsd->deal.item[trade_i].amount, 1, 6, LOG_TYPE_TRADE); + else + clif_additem(tsd, n, tsd->deal.item[trade_i].amount, 0); + tsd->deal.item[trade_i].index = 0; + tsd->deal.item[trade_i].amount = 0; + } + } + + if( sd->deal.zeny ) { + pc_payzeny(sd ,sd->deal.zeny, LOG_TYPE_TRADE, tsd); + pc_getzeny(tsd,sd->deal.zeny,LOG_TYPE_TRADE, sd); + sd->deal.zeny = 0; + + } + if ( tsd->deal.zeny) { + pc_payzeny(tsd,tsd->deal.zeny,LOG_TYPE_TRADE, sd); + pc_getzeny(sd ,tsd->deal.zeny,LOG_TYPE_TRADE, tsd); + tsd->deal.zeny = 0; + } + + sd->state.deal_locked = 0; + sd->trade_partner = 0; + sd->state.trading = 0; + + tsd->state.deal_locked = 0; + tsd->trade_partner = 0; + tsd->state.trading = 0; + + clif_tradecompleted(sd, 0); + clif_tradecompleted(tsd, 0); + + // save both player to avoid crash: they always have no advantage/disadvantage between the 2 players + if (save_settings&1) + { + chrif_save(sd,0); + chrif_save(tsd,0); + } +} |