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/* |
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* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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* |
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* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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* Copyright (©) 2001 Mark Wedel |
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* Copyright (©) 1992 Frank Tore Johansen |
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* |
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* Deliantra is free software: you can redistribute it and/or modify it under |
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* the terms of the Affero GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or (at your |
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* option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the Affero GNU General Public License |
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* and the GNU General Public License along with this program. If not, see |
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* <http://www.gnu.org/licenses/>. |
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* |
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* The authors can be reached via e-mail to <support@deliantra.net> |
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*/ |
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|
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//+GPL |
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|
27 |
/** |
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* \file |
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* Client handling. |
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* |
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* \date 2003-12-02 |
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* |
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* This file implements all of the goo on the server side for handling |
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* clients. It's got a bunch of global variables for keeping track of |
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* each of the clients. |
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* |
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* Note: All functions that are used to process data from the client |
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* have the prototype of (char *data, int datalen, int client_num). This |
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* way, we can use one dispatch table. |
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* |
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* esrv_map_new starts updating the map |
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* |
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*/ |
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|
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#include <global.h> |
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#include <sproto.h> |
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|
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#include <living.h> |
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|
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/* This block is basically taken from socket.c - I assume if it works there, |
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* it should work here. |
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*/ |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netdb.h> |
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|
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#include <unistd.h> |
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#include <sys/time.h> |
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|
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#include "sounds.h" |
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|
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/** |
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* This table translates the attack numbers as used within the |
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* program to the value we use when sending STATS command to the |
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* client. If a value is -1, then we don't send that to the |
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* client. |
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*/ |
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static short atnr_cs_stat[NROFATTACKS] = |
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{ |
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CS_STAT_RES_PHYS, |
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CS_STAT_RES_MAG, |
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CS_STAT_RES_FIRE, |
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CS_STAT_RES_ELEC, |
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CS_STAT_RES_COLD, |
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CS_STAT_RES_CONF, |
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CS_STAT_RES_ACID, |
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CS_STAT_RES_DRAIN, |
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-1 /* weaponmagic */, |
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CS_STAT_RES_GHOSTHIT, |
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CS_STAT_RES_POISON, |
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CS_STAT_RES_SLOW, |
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CS_STAT_RES_PARA, |
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CS_STAT_TURN_UNDEAD, |
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CS_STAT_RES_FEAR, |
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-1 /* Cancellation */, |
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CS_STAT_RES_DEPLETE, |
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CS_STAT_RES_DEATH, |
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-1 /* Chaos */, |
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-1 /* Counterspell */, |
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-1 /* Godpower */, |
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CS_STAT_RES_HOLYWORD, |
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CS_STAT_RES_BLIND, |
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-1, /* Internal */ |
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-1, /* life stealing */ |
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-1 /* Disease - not fully done yet */ |
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}; |
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|
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static void |
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socket_map_scroll (client *ns, int dx, int dy) |
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{ |
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struct Map newmap; |
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int x, y, mx, my; |
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|
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ns->send_packet_printf ("map_scroll %d %d", dx, dy); |
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|
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/* If we are using the Map1aCmd, we may in fact send |
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* head information that is outside the viewable map. |
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* So set the mx,my to the max value we want to |
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* look for. Removed code to do so - it caused extra |
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* complexities for the client, and probably doesn't make |
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* that much difference in bandwidth. |
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*/ |
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mx = ns->mapx; |
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my = ns->mapy; |
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|
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/* the x and y here are coordinates for the new map, i.e. if we moved |
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* (dx,dy), newmap[x][y] = oldmap[x-dx][y-dy]. For this reason, |
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* if the destination x or y coordinate is outside the viewable |
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* area, we clear the values - otherwise, the old values |
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* are preserved, and the check_head thinks it needs to clear them. |
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*/ |
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for (x = 0; x < mx; x++) |
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for (y = 0; y < my; y++) |
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if (x >= ns->mapx || y >= ns->mapy) |
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/* clear cells outside the viewable area */ |
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memset (&newmap.cells[x][y], 0, sizeof (struct MapCell)); |
129 |
else if ((x + dx) < 0 || (x + dx) >= ns->mapx || (y + dy) < 0 || (y + dy) >= ns->mapy) |
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/* clear newly visible tiles within the viewable area */ |
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memset (&(newmap.cells[x][y]), 0, sizeof (struct MapCell)); |
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else |
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memcpy (&(newmap.cells[x][y]), &(ns->lastmap.cells[x + dx][y + dy]), sizeof (struct MapCell)); |
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|
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memcpy (&(ns->lastmap), &newmap, sizeof (struct Map)); |
136 |
|
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/* Make sure that the next "map1" command will be sent (even if it is |
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* empty). |
139 |
*/ |
140 |
ns->sent_scroll = 1; |
141 |
} |
142 |
|
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static void |
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clear_map (player *pl) |
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{ |
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pl->ns->mapinfo_queue_clear (); |
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|
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memset (&pl->ns->lastmap, 0, sizeof (pl->ns->lastmap)); |
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|
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pl->ns->force_newmap = false; |
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pl->ns->send_packet ("newmap"); |
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pl->ns->floorbox_reset (); |
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} |
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|
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static void |
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send_map_info (player *pl) |
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{ |
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client &socket = *pl->ns; |
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object *ob = pl->viewpoint; |
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|
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if (socket.mapinfocmd) |
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{ |
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if (ob->map && ob->map->path) |
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{ |
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int flags = 0; |
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|
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// due to historical glitches, the bit ordering and map index ordering differs |
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if (ob->map->tile_path [TILE_NORTH]) flags |= 0x01; |
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if (ob->map->tile_path [TILE_EAST ]) flags |= 0x02; |
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if (ob->map->tile_path [TILE_SOUTH]) flags |= 0x04; |
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if (ob->map->tile_path [TILE_WEST ]) flags |= 0x08; |
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// these two are debatable |
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if (ob->map->tile_path [TILE_UP ]) flags |= 0x10; |
174 |
if (ob->map->tile_path [TILE_DOWN ]) flags |= 0x20; |
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|
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socket.send_packet_printf ("mapinfo - spatial %d %d %d %d %d %s", |
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flags, socket.mapx / 2 - ob->x, socket.mapy / 2 - ob->y, |
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ob->map->width, ob->map->height, &ob->map->path); |
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} |
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else |
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socket.send_packet ("mapinfo current"); |
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} |
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} |
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|
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/** check for map/region change and send new map data */ |
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static void |
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check_map_change (player *pl) |
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{ |
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client &socket = *pl->ns; |
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object *ob = pl->viewpoint; |
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|
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region *reg = ob->region (); |
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if (socket.current_region != reg) |
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{ |
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INVOKE_PLAYER (REGION_CHANGE, pl, ARG_REGION (reg), ARG_REGION (socket.current_region)); |
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socket.current_region = reg; |
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} |
198 |
|
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// first try to avoid a full newmap on tiled map scrolls |
200 |
if (socket.current_map != ob->map && !socket.force_newmap) |
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{ |
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rv_vector rv; |
203 |
|
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get_rangevector_from_mapcoord (socket.current_map, socket.current_x, socket.current_y, ob, &rv, 0); |
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|
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// manhattan distance is very handy here |
207 |
if (rv.distance < 8) // 8 works nicely for speed << 70 and buggy gcfclient |
208 |
{ |
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socket.current_map = ob->map; |
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socket.current_x = ob->x; |
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socket.current_y = ob->y; |
212 |
|
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socket_map_scroll (&socket, rv.distance_x, rv.distance_y); |
214 |
socket.floorbox_reset (); |
215 |
send_map_info (pl); |
216 |
} |
217 |
} |
218 |
|
219 |
if (socket.current_map != ob->map || socket.force_newmap) |
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{ |
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clear_map (pl); |
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socket.current_map = ob->map; |
223 |
send_map_info (pl); |
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} |
225 |
else if (socket.current_x != ob->x || socket.current_y != ob->y) |
226 |
{ |
227 |
int dx = ob->x - socket.current_x; |
228 |
int dy = ob->y - socket.current_y; |
229 |
|
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socket_map_scroll (&socket, ob->x - socket.current_x, ob->y - socket.current_y); |
231 |
socket.floorbox_reset (); |
232 |
} |
233 |
|
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socket.current_x = ob->x; |
235 |
socket.current_y = ob->y; |
236 |
} |
237 |
|
238 |
/** |
239 |
* This sends the skill number to name mapping. We ignore |
240 |
* the params - we always send the same info no matter what. |
241 |
*/ |
242 |
static void |
243 |
send_skill_info (client *ns, char *params) |
244 |
{ |
245 |
packet sl; |
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sl << "replyinfo skill_info\n"; |
247 |
|
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for (int i = 0; i < skillvec.size (); ++i) |
249 |
sl.printf ("%d:%s\n", CS_STAT_SKILLINFO + i, &skillvec [i]->name); |
250 |
|
251 |
if (sl.length () > MAXSOCKBUF) |
252 |
cleanup ("buffer overflow in send_skill_info!"); |
253 |
|
254 |
ns->send_packet (sl); |
255 |
} |
256 |
|
257 |
/** |
258 |
* This sends the spell path to name mapping. We ignore |
259 |
* the params - we always send the same info no matter what. |
260 |
*/ |
261 |
static void |
262 |
send_spell_paths (client * ns, char *params) |
263 |
{ |
264 |
packet sl; |
265 |
|
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sl << "replyinfo spell_paths\n"; |
267 |
|
268 |
for (int i = 0; i < NRSPELLPATHS; i++) |
269 |
sl.printf ("%d:%s\n", 1 << i, spellpathnames[i]); |
270 |
|
271 |
if (sl.length () > MAXSOCKBUF) |
272 |
cleanup ("buffer overflow in send_spell_paths!"); |
273 |
|
274 |
ns->send_packet (sl); |
275 |
} |
276 |
|
277 |
/** |
278 |
* RequestInfo is sort of a meta command. There is some specific |
279 |
* request of information, but we call other functions to provide |
280 |
* that information. |
281 |
* requestinfo is completely deprecated, use resource exti request |
282 |
* and the fxix or http protocols. |
283 |
*/ |
284 |
void |
285 |
RequestInfo (char *buf, int len, client *ns) |
286 |
{ |
287 |
char *params; |
288 |
|
289 |
/* find the first space, make it null, and update the |
290 |
* params pointer. |
291 |
*/ |
292 |
for (params = buf; *params; params++) |
293 |
if (*params == ' ') |
294 |
{ |
295 |
*params++ = 0; |
296 |
break; |
297 |
} |
298 |
|
299 |
if (!strcmp (buf, "skill_info")) |
300 |
send_skill_info (ns, params); |
301 |
else if (!strcmp (buf, "spell_paths")) |
302 |
send_spell_paths (ns, params); |
303 |
else |
304 |
{ |
305 |
// undo tokenisation above and send replyinfo with the request unchanged |
306 |
if (*params) |
307 |
*--params = ' '; |
308 |
|
309 |
ns->send_packet_printf ("replyinfo %s", buf); |
310 |
} |
311 |
} |
312 |
|
313 |
void |
314 |
ExtCmd (char *buf, int len, player *pl) |
315 |
{ |
316 |
INVOKE_PLAYER (EXTCMD, pl, ARG_DATA (buf, len)); |
317 |
} |
318 |
|
319 |
void |
320 |
ExtiCmd (char *buf, int len, client *ns) |
321 |
{ |
322 |
INVOKE_CLIENT (EXTICMD, ns, ARG_DATA (buf, len)); |
323 |
} |
324 |
|
325 |
//-GPL |
326 |
|
327 |
void |
328 |
client::mapinfo_queue_clear () |
329 |
{ |
330 |
for (auto (i, mapinfo_queue.begin ()); i != mapinfo_queue.end (); ++i) |
331 |
free (*i); |
332 |
|
333 |
mapinfo_queue.clear (); |
334 |
} |
335 |
|
336 |
bool |
337 |
client::mapinfo_try (char *buf) |
338 |
{ |
339 |
char *token = buf; |
340 |
buf += strlen (buf) + 9; |
341 |
|
342 |
// initial map and its origin |
343 |
maptile *map = pl->viewpoint->map; |
344 |
int mapx = pl->ns->mapx / 2 - pl->viewpoint->x; |
345 |
int mapy = pl->ns->mapy / 2 - pl->viewpoint->y; |
346 |
int max_distance = 8; // limit maximum path length to something generous |
347 |
|
348 |
while (*buf && map && max_distance) |
349 |
{ |
350 |
int dir = *buf++ - '1'; |
351 |
|
352 |
// due to historical glitches, the mapinfo index and tile index differs |
353 |
static unsigned char dirmap [] = { TILE_NORTH, TILE_EAST, TILE_SOUTH, TILE_WEST, TILE_UP, TILE_DOWN }; |
354 |
|
355 |
// maybe we should only allow the four flat directions |
356 |
if (IN_RANGE_EXC (dir, 0, array_length (dirmap))) |
357 |
{ |
358 |
dir = dirmap [dir]; |
359 |
|
360 |
if (!map->tile_path [dir]) |
361 |
map = 0; |
362 |
else if (map->tile_available (dir, false)) |
363 |
{ |
364 |
maptile *neigh = map->tile_map [dir]; |
365 |
|
366 |
switch (dir) |
367 |
{ |
368 |
case 0: mapy -= neigh->height; break; |
369 |
case 2: mapy += map ->height; break; |
370 |
case 3: mapx -= neigh->width ; break; |
371 |
case 1: mapx += map ->width ; break; |
372 |
} |
373 |
|
374 |
map = neigh; |
375 |
--max_distance; |
376 |
} |
377 |
else |
378 |
return 0; |
379 |
} |
380 |
else |
381 |
max_distance = 0; |
382 |
} |
383 |
|
384 |
if (!max_distance) |
385 |
send_packet_printf ("mapinfo %s error", token); |
386 |
else if (!map || !map->path) |
387 |
send_packet_printf ("mapinfo %s nomap", token); |
388 |
else |
389 |
{ |
390 |
int flags = 0; |
391 |
|
392 |
// due to historical glitches, the bit ordering and map index ordering differs |
393 |
if (map->tile_path [TILE_NORTH]) flags |= 0x01; |
394 |
if (map->tile_path [TILE_EAST ]) flags |= 0x02; |
395 |
if (map->tile_path [TILE_SOUTH]) flags |= 0x04; |
396 |
if (map->tile_path [TILE_WEST ]) flags |= 0x08; |
397 |
// these two are debatable |
398 |
if (map->tile_path [TILE_UP ]) flags |= 0x10; |
399 |
if (map->tile_path [TILE_DOWN ]) flags |= 0x20; |
400 |
|
401 |
send_packet_printf ("mapinfo %s spatial %d %d %d %d %d %s", token, flags, mapx, mapy, map->width, map->height, &map->path); |
402 |
} |
403 |
|
404 |
return 1; |
405 |
} |
406 |
|
407 |
void |
408 |
client::mapinfo_queue_run () |
409 |
{ |
410 |
if (mapinfo_queue.empty () || !pl) |
411 |
return; |
412 |
|
413 |
for (int i = 0; i < mapinfo_queue.size (); ++i) |
414 |
if (mapinfo_try (mapinfo_queue [i])) |
415 |
{ |
416 |
free (mapinfo_queue [i]); |
417 |
mapinfo_queue.erase (i); |
418 |
} |
419 |
else |
420 |
++i; |
421 |
} |
422 |
|
423 |
void |
424 |
MapInfoCmd (char *buf, int len, player *pl) |
425 |
{ |
426 |
// <mapinfo tag spatial tile-path |
427 |
// >mapinfo tag spatial flags x y w h hash |
428 |
|
429 |
char *token = buf; |
430 |
|
431 |
if (!(buf = strchr (buf, ' '))) |
432 |
return; |
433 |
|
434 |
if (!strncmp (buf, " spatial ", 9)) |
435 |
{ |
436 |
char *copy = strdup (token); |
437 |
copy [buf - token] = 0; |
438 |
|
439 |
#if 0 |
440 |
// this makes only sense when we flush the buffer immediately |
441 |
if (pl->ns->mapinfo_try (copy)) |
442 |
free (copy); |
443 |
else |
444 |
#endif |
445 |
pl->ns->mapinfo_queue.push_back (copy); |
446 |
} |
447 |
else |
448 |
pl->ns->send_packet_printf ("mapinfo %s unsupported", token); |
449 |
} |
450 |
|
451 |
/** This is the Setup cmd */ |
452 |
void |
453 |
SetUp (char *buf, int len, client * ns) |
454 |
{ |
455 |
INVOKE_CLIENT (SETUP, ns, ARG_DATA (buf, len)); |
456 |
} |
457 |
|
458 |
/** |
459 |
* The client has requested to be added to the game. |
460 |
* This is what takes care of it. We tell the client how things worked out. |
461 |
* I am not sure if this file is the best place for this function. however, |
462 |
* it either has to be here or init_sockets needs to be exported. |
463 |
*/ |
464 |
void |
465 |
AddMeCmd (char *buf, int len, client *ns) |
466 |
{ |
467 |
INVOKE_CLIENT (ADDME, ns, ARG_DATA (buf, len)); |
468 |
} |
469 |
|
470 |
//+GPL |
471 |
|
472 |
/** |
473 |
* This handles the general commands from the client (ie, north, fire, cast, |
474 |
* etc.) |
475 |
*/ |
476 |
void |
477 |
PlayerCmd (char *buf, int len, player *pl) |
478 |
{ |
479 |
/* Check if there is a count. In theory, a zero count could also be |
480 |
* sent, so check for that also. |
481 |
*/ |
482 |
if (atoi (buf) || buf[0] == '0') |
483 |
{ |
484 |
pl->count = atoi ((char *) buf); |
485 |
|
486 |
buf = strchr (buf, ' '); /* advance beyond the numbers */ |
487 |
if (!buf) |
488 |
return; |
489 |
|
490 |
buf++; |
491 |
} |
492 |
|
493 |
execute_newserver_command (pl->ob, (char *)buf); |
494 |
|
495 |
/* Perhaps something better should be done with a left over count. |
496 |
* Cleaning up the input should probably be done first - all actions |
497 |
* for the command that issued the count should be done before any other |
498 |
* commands. |
499 |
*/ |
500 |
pl->count = 0; |
501 |
} |
502 |
|
503 |
/** This is a reply to a previous query. */ |
504 |
void |
505 |
ReplyCmd (char *buf, int len, client *ns) |
506 |
{ |
507 |
if (ns->state == ST_CUSTOM) |
508 |
{ |
509 |
INVOKE_CLIENT (REPLY, ns, ARG_DATA (buf, len)); |
510 |
return; |
511 |
} |
512 |
|
513 |
if (!ns->pl) |
514 |
return; //TODO: depends on the exact reply we are after |
515 |
//TODO: but right now, we always have a ns->pl |
516 |
|
517 |
player *pl = ns->pl; |
518 |
|
519 |
/* This is to synthesize how the data would be stored if it |
520 |
* was normally entered. A bit of a hack, and should be cleaned up |
521 |
* once all the X11 code is removed from the server. |
522 |
* |
523 |
* We pass 13 to many of the functions because this way they |
524 |
* think it was the carriage return that was entered, and the |
525 |
* function then does not try to do additional input. |
526 |
*/ |
527 |
snprintf (pl->write_buf, sizeof (pl->write_buf), ":%s", buf); |
528 |
|
529 |
/* this avoids any hacking here */ |
530 |
|
531 |
switch (ns->state) |
532 |
{ |
533 |
case ST_PLAYING: |
534 |
LOG (llevError, "Got reply message with ST_PLAYING input state\n"); |
535 |
break; |
536 |
|
537 |
case ST_GET_PARTY_PASSWORD: /* Get password for party */ |
538 |
receive_party_password (pl->ob, 13); |
539 |
break; |
540 |
|
541 |
default: |
542 |
LOG (llevError, "Unknown input state: %d\n", ns->state); |
543 |
} |
544 |
} |
545 |
|
546 |
/** |
547 |
* Client tells its version info. |
548 |
*/ |
549 |
void |
550 |
VersionCmd (char *buf, int len, client *ns) |
551 |
{ |
552 |
INVOKE_CLIENT (VERSION, ns, ARG_DATA (buf, len)); |
553 |
} |
554 |
|
555 |
/** sound related functions. */ |
556 |
void |
557 |
SetSound (char *buf, int len, client * ns) |
558 |
{ |
559 |
ns->sound = atoi (buf); |
560 |
} |
561 |
|
562 |
/** client wants the map resent */ |
563 |
void |
564 |
MapRedrawCmd (char *buf, int len, player *pl) |
565 |
{ |
566 |
/* This function is currently disabled; just clearing the map state results in |
567 |
* display errors. It should clear the cache and send a newmap command. |
568 |
* Unfortunately this solution does not work because some client versions send |
569 |
* a mapredraw command after receiving a newmap command. |
570 |
*/ |
571 |
} |
572 |
|
573 |
/** |
574 |
* Moves an object (typically, container to inventory). |
575 |
* syntax is: move (to) (tag) (nrof) |
576 |
*/ |
577 |
void |
578 |
MoveCmd (char *buf, int len, player *pl) |
579 |
{ |
580 |
int to, tag, nrof; |
581 |
|
582 |
if (3 != sscanf (buf, "%d %d %d", &to, &tag, &nrof)) |
583 |
{ |
584 |
LOG (llevError, "Incomplete move command: %s\n", buf); |
585 |
return; |
586 |
} |
587 |
|
588 |
esrv_move_object (pl->ob, to, tag, nrof); |
589 |
} |
590 |
|
591 |
/****************************************************************************** |
592 |
* |
593 |
* Start of commands the server sends to the client. |
594 |
* |
595 |
******************************************************************************/ |
596 |
|
597 |
/** |
598 |
* Asks the client to query the user. This way, the client knows |
599 |
* it needs to send something back (vs just printing out a message) |
600 |
*/ |
601 |
void |
602 |
send_query (client *ns, uint8 flags, const char *text) |
603 |
{ |
604 |
ns->send_packet_printf ("query %d %s", flags, text ? text : ""); |
605 |
} |
606 |
|
607 |
/** |
608 |
* Get player's current range attack in obuf. |
609 |
*/ |
610 |
static void |
611 |
rangetostring (player *pl, char *obuf) |
612 |
{ |
613 |
dynbuf_text &buf = msg_dynbuf; buf.clear (); |
614 |
|
615 |
#if 0 |
616 |
// print ranged/chosen_skill etc. objects every call |
617 |
printf ("%s %s => %s (%s)\n", |
618 |
pl->ranged_ob ? &pl->ranged_ob->name : "-", |
619 |
pl->combat_ob ? &pl->combat_ob->name : "-", |
620 |
pl->ob->current_weapon ? &pl->ob->current_weapon->name : "-", |
621 |
pl->ob->chosen_skill ? &pl->ob->chosen_skill->name : "-" |
622 |
); |
623 |
#endif |
624 |
|
625 |
if (pl->ranged_ob) |
626 |
buf << " Range" << (pl->ob->current_weapon == pl->ranged_ob ? "*" : "") << ": " << pl->ranged_ob->name; |
627 |
|
628 |
if (pl->combat_ob) |
629 |
buf << " Combat" << (pl->ob->current_weapon == pl->combat_ob ? "*" : "") << ": " << pl->combat_ob->name; |
630 |
|
631 |
#if 0 |
632 |
//TODO: remove this when slot system is working, this is only for debugging |
633 |
if (pl->ob->chosen_skill) |
634 |
buf << " Skill*: " << pl->ob->chosen_skill->name; |
635 |
#endif |
636 |
|
637 |
//TODO: maybe golem should become the current_weapon, quite simply? |
638 |
if (pl->golem) |
639 |
buf << " Golem*: " << pl->golem->name; |
640 |
|
641 |
buf << '\0'; |
642 |
buf.linearise (obuf); |
643 |
} |
644 |
|
645 |
#define AddIfInt64(Old,New,Type) if (Old != New) {\ |
646 |
Old = New; \ |
647 |
sl << uint8 (Type) << uint64 (New); \ |
648 |
} |
649 |
|
650 |
#define AddIfInt(Old,New,Type) if (Old != New) {\ |
651 |
Old = New; \ |
652 |
sl << uint8 (Type) << uint32 (New); \ |
653 |
} |
654 |
|
655 |
#define AddIfShort(Old,New,Type) if (Old != New) {\ |
656 |
Old = New; \ |
657 |
sl << uint8 (Type) << uint16 (New); \ |
658 |
} |
659 |
|
660 |
#define AddIfFloat(Old,New,Type,mult) if (Old != New) {\ |
661 |
Old = New; \ |
662 |
sl << uint8 (Type) << uint32 (New*FLOAT_MULTI*mult); \ |
663 |
} |
664 |
|
665 |
#define AddIfString(Old,New,Type) if (Old == NULL || strcmp(Old,New)) {\ |
666 |
free(Old); Old = strdup (New);\ |
667 |
sl << uint8 (Type) << data8 (New); \ |
668 |
} |
669 |
|
670 |
/** |
671 |
* Sends a statistics update. We look at the old values, |
672 |
* and only send what has changed. Stat mapping values are in newclient.h |
673 |
* Since this gets sent a lot, this is actually one of the few binary |
674 |
* commands for now. |
675 |
*/ |
676 |
void |
677 |
esrv_update_stats (player *pl) |
678 |
{ |
679 |
client *ns = pl->ns; |
680 |
if (!ns) |
681 |
return; |
682 |
|
683 |
object *ob = pl->observe; |
684 |
if (!ob) |
685 |
return; |
686 |
|
687 |
player *opl = ob->contr ? static_cast<player *>(ob->contr) : pl; |
688 |
|
689 |
packet sl ("stats"); |
690 |
|
691 |
AddIfShort (ns->last_stats.hp, ob->stats.hp, CS_STAT_HP); |
692 |
AddIfShort (ns->last_stats.maxhp, ob->stats.maxhp, CS_STAT_MAXHP); |
693 |
AddIfShort (ns->last_stats.sp, ob->stats.sp, CS_STAT_SP); |
694 |
AddIfShort (ns->last_stats.maxsp, ob->stats.maxsp, CS_STAT_MAXSP); |
695 |
AddIfShort (ns->last_stats.grace, ob->stats.grace, CS_STAT_GRACE); |
696 |
AddIfShort (ns->last_stats.maxgrace, ob->stats.maxgrace, CS_STAT_MAXGRACE); |
697 |
AddIfShort (ns->last_stats.Str, ob->stats.Str, CS_STAT_STR); |
698 |
AddIfShort (ns->last_stats.Dex, ob->stats.Dex, CS_STAT_DEX); |
699 |
AddIfShort (ns->last_stats.Con, ob->stats.Con, CS_STAT_CON); |
700 |
AddIfShort (ns->last_stats.Int, ob->stats.Int, CS_STAT_INT); |
701 |
AddIfShort (ns->last_stats.Wis, ob->stats.Wis, CS_STAT_WIS); |
702 |
AddIfShort (ns->last_stats.Pow, ob->stats.Pow, CS_STAT_POW); |
703 |
AddIfShort (ns->last_stats.Cha, ob->stats.Cha, CS_STAT_CHA); |
704 |
|
705 |
for (int s = 0; s < CS_NUM_SKILLS; s++) |
706 |
if (object *skill = opl->last_skill_ob [s]) |
707 |
if (skill->stats.exp != ns->last_skill_exp [s]) |
708 |
{ |
709 |
ns->last_skill_exp [s] = skill->stats.exp; |
710 |
|
711 |
/* Always send along the level if exp changes. This is only |
712 |
* 1 extra byte, but keeps processing simpler. |
713 |
*/ |
714 |
sl << uint8 (CS_STAT_SKILLINFO + s) |
715 |
<< uint8 (skill->level) |
716 |
<< uint64 (skill->stats.exp); |
717 |
} |
718 |
|
719 |
AddIfInt64 (ns->last_stats.exp, ob->stats.exp, CS_STAT_EXP64); |
720 |
AddIfShort (ns->last_level, ob->level, CS_STAT_LEVEL); |
721 |
AddIfShort (ns->last_stats.wc, ob->stats.wc, CS_STAT_WC); |
722 |
AddIfShort (ns->last_stats.ac, ob->stats.ac, CS_STAT_AC); |
723 |
AddIfShort (ns->last_stats.dam, ob->stats.dam, CS_STAT_DAM); |
724 |
AddIfFloat (ns->last_speed, ob->speed, CS_STAT_SPEED, 1.f / TICK); |
725 |
AddIfShort (ns->last_stats.food, ob->stats.food, CS_STAT_FOOD); |
726 |
AddIfFloat (ns->last_weapon_sp, pl->weapon_sp, CS_STAT_WEAP_SP, 1.f / TICK); |
727 |
AddIfInt (ns->last_weight_limit, weight_limit[ob->stats.Str], CS_STAT_WEIGHT_LIM); |
728 |
|
729 |
int flags = (opl->fire_on ? SF_FIREON : 0) |
730 |
| (opl->run_on ? SF_RUNON : 0); |
731 |
|
732 |
AddIfShort (ns->last_flags, flags, CS_STAT_FLAGS); |
733 |
|
734 |
for (int i = 0; i < NROFATTACKS; i++) |
735 |
/* Skip ones we won't send */ |
736 |
if (atnr_cs_stat[i] >= 0) |
737 |
AddIfShort (ns->last_resist[i], ob->resist[i], atnr_cs_stat[i]); |
738 |
|
739 |
if (pl->ns->monitor_spells) |
740 |
{ |
741 |
AddIfInt (ns->last_path_attuned, ob->path_attuned, CS_STAT_SPELL_ATTUNE); |
742 |
AddIfInt (ns->last_path_repelled, ob->path_repelled, CS_STAT_SPELL_REPEL); |
743 |
AddIfInt (ns->last_path_denied, ob->path_denied, CS_STAT_SPELL_DENY); |
744 |
} |
745 |
|
746 |
char buf[MAX_BUF]; |
747 |
rangetostring (opl, buf); /* we want use the new fire & run system in new client */ |
748 |
AddIfString (ns->stats.range, buf, CS_STAT_RANGE); |
749 |
set_title (ob, buf); |
750 |
AddIfString (ns->stats.title, buf, CS_STAT_TITLE); |
751 |
|
752 |
/* Only send it away if we have some actual data */ |
753 |
if (sl.length () > 6) |
754 |
ns->send_packet (sl); |
755 |
} |
756 |
|
757 |
/** |
758 |
* Tells the client that here is a player it should start using. |
759 |
*/ |
760 |
void |
761 |
esrv_new_player (player *pl) |
762 |
{ |
763 |
sint32 weight = pl->ob->client_weight (); |
764 |
|
765 |
packet sl ("player"); |
766 |
|
767 |
sl << uint32 (pl->ob->count) |
768 |
<< uint32 (weight) |
769 |
<< uint32 (pl->ob->face) |
770 |
<< data8 (pl->ob->name); |
771 |
|
772 |
pl->ns->last_weight = weight; |
773 |
pl->ns->send_packet (sl); |
774 |
} |
775 |
|
776 |
/****************************************************************************** |
777 |
* |
778 |
* Start of map related commands. |
779 |
* |
780 |
******************************************************************************/ |
781 |
|
782 |
/** Clears a map cell */ |
783 |
static void |
784 |
map_clearcell (struct MapCell *cell, int count) |
785 |
{ |
786 |
cell->faces[0] = 0; |
787 |
cell->faces[1] = 0; |
788 |
cell->faces[2] = 0; |
789 |
cell->smooth[0] = 0; |
790 |
cell->smooth[1] = 0; |
791 |
cell->smooth[2] = 0; |
792 |
cell->count = count; |
793 |
cell->stat_hp = 0; |
794 |
cell->flags = 0; |
795 |
cell->player = 0; |
796 |
} |
797 |
|
798 |
#define MAX_LAYERS 3 |
799 |
|
800 |
/** |
801 |
* Removes the need to replicate the same code for each layer. |
802 |
* this returns true if this space is now in fact different than |
803 |
* it was. |
804 |
* sl is the socklist this data is going into. |
805 |
* ns is the socket we are working on - all the info we care |
806 |
* about is in this socket structure, so now need not pass the |
807 |
* entire player object. |
808 |
* layer is the layer to update, with 2 being the floor and 0 the |
809 |
* top layer (this matches what the GET_MAP_FACE and GET_MAP_FACE_OBJ) |
810 |
* take. Interesting to note that before this function, the map1 function |
811 |
* numbers the spaces differently - I think this was a leftover from |
812 |
* the map command, where the faces stack up. Sinces that is no longer |
813 |
* the case, it seems to make more sense to have these layer values |
814 |
* actually match. |
815 |
*/ |
816 |
static int |
817 |
update_space (packet &sl, client &ns, mapspace &ms, MapCell &lastcell, int layer) |
818 |
{ |
819 |
object *ob = ms.faces_obj [layer]; |
820 |
|
821 |
/* If there is no object for this space, or if the face for the object |
822 |
* is the blank face, set the face number to zero. |
823 |
* else if we have the stored head object for this space, that takes |
824 |
* precedence over the other object for this space. |
825 |
* otherwise, we do special head processing |
826 |
*/ |
827 |
uint16 face_num = ob && ob->face != blank_face ? ob->face : 0; |
828 |
|
829 |
/* We've gotten what face we want to use for the object. Now see if |
830 |
* if it has changed since we last sent it to the client. |
831 |
*/ |
832 |
if (lastcell.faces[layer] != face_num) |
833 |
{ |
834 |
lastcell.faces[layer] = face_num; |
835 |
|
836 |
if (!ns.faces_sent[face_num]) |
837 |
if (ob) |
838 |
ns.send_faces (ob); |
839 |
else |
840 |
ns.send_face (face_num, 10); |
841 |
|
842 |
sl << uint16 (face_num); |
843 |
return 1; |
844 |
} |
845 |
|
846 |
/* Nothing changed */ |
847 |
return 0; |
848 |
} |
849 |
|
850 |
/** |
851 |
* Draws client map. |
852 |
*/ |
853 |
void |
854 |
draw_client_map (player *pl) |
855 |
{ |
856 |
object *ob = pl->viewpoint; |
857 |
if (!pl->observe->active) |
858 |
return; |
859 |
|
860 |
/* If player is just joining the game, he isn't here yet, so the map |
861 |
* can get swapped out. If so, don't try to send them a map. All will |
862 |
* be OK once they really log in. |
863 |
*/ |
864 |
if (!ob->map || ob->map->state != MAP_ACTIVE) |
865 |
return; |
866 |
|
867 |
int startlen, oldlen; |
868 |
|
869 |
check_map_change (pl); |
870 |
pl->ob->prefetch_surrounding_maps (); |
871 |
|
872 |
/* do LOS after calls to update_position */ |
873 |
/* unfortunately, we need to udpate los when observing, currently */ |
874 |
if (pl->do_los || pl->viewpoint != pl->ob) |
875 |
{ |
876 |
pl->do_los = 0; |
877 |
pl->update_los (); |
878 |
} |
879 |
|
880 |
/** |
881 |
* This function uses the new map1 protocol command to send the map |
882 |
* to the client. It is necessary because the old map command supports |
883 |
* a maximum map size of 15x15. |
884 |
* This function is much simpler than the old one. This is because |
885 |
* the old function optimized to send as few face identifiers as possible, |
886 |
* at the expense of sending more coordinate location (coordinates were |
887 |
* only 1 byte, faces 2 bytes, so this was a worthwhile savings). Since |
888 |
* we need 2 bytes for coordinates and 2 bytes for faces, such a trade off |
889 |
* maps no sense. Instead, we actually really only use 12 bits for coordinates, |
890 |
* and use the other 4 bits for other informatiion. For full documentation |
891 |
* of what we send, see the doc/Protocol file. |
892 |
* I will describe internally what we do: |
893 |
* the ns->lastmap shows how the map last looked when sent to the client. |
894 |
* in the lastmap structure, there is a cells array, which is set to the |
895 |
* maximum viewable size (As set in config.h). |
896 |
* in the cells, there are faces and a count value. |
897 |
* we use the count value to hold the darkness value. If -1, then this space |
898 |
* is not viewable. |
899 |
* we use faces[0] faces[1] faces[2] to hold what the three layers |
900 |
* look like. |
901 |
*/ |
902 |
|
903 |
client &socket = *pl->ns; |
904 |
|
905 |
packet sl ("map1a"); |
906 |
|
907 |
startlen = sl.length (); |
908 |
|
909 |
int hx = socket.mapx / 2; |
910 |
int hy = socket.mapy / 2; |
911 |
|
912 |
ordered_mapwalk_begin (ob, -hx, -hy, hx, hy) |
913 |
int ax = dx + hx; |
914 |
int ay = dy + hy; |
915 |
|
916 |
int mask = (ax << 10) | (ay << 4); |
917 |
MapCell &lastcell = socket.lastmap.cells[ax][ay]; |
918 |
|
919 |
/* If the coordinates are not valid, or it is too dark to see, |
920 |
* we tell the client as such |
921 |
*/ |
922 |
if (!m) |
923 |
{ |
924 |
/* space is out of map. Update space and clear values |
925 |
* if this hasn't already been done. If the space is out |
926 |
* of the map, it shouldn't have a head. |
927 |
*/ |
928 |
if (lastcell.count != -1) |
929 |
{ |
930 |
sl << uint16 (mask); |
931 |
map_clearcell (&lastcell, -1); |
932 |
} |
933 |
|
934 |
continue; |
935 |
} |
936 |
|
937 |
int d = pl->blocked_los_uc (dx, dy); |
938 |
|
939 |
if (d > 3) |
940 |
{ |
941 |
/* This block deals with spaces that are not visible for whatever |
942 |
* reason. Still may need to send the head for this space. |
943 |
*/ |
944 |
if (lastcell.count != -1 |
945 |
|| lastcell.faces[0] |
946 |
|| lastcell.faces[1] |
947 |
|| lastcell.faces[2] |
948 |
|| lastcell.stat_hp |
949 |
|| lastcell.flags |
950 |
|| lastcell.player) |
951 |
sl << uint16 (mask); |
952 |
|
953 |
/* properly clear a previously sent big face */ |
954 |
map_clearcell (&lastcell, -1); |
955 |
} |
956 |
else |
957 |
{ |
958 |
/* In this block, the space is visible. |
959 |
*/ |
960 |
|
961 |
/* Rather than try to figure out what everything that we might |
962 |
* need to send is, then form the packet after that, |
963 |
* we presume that we will in fact form a packet, and update |
964 |
* the bits by what we do actually send. If we send nothing, |
965 |
* we just back out sl.length () to the old value, and no harm |
966 |
* is done. |
967 |
* I think this is simpler than doing a bunch of checks to see |
968 |
* what if anything we need to send, setting the bits, then |
969 |
* doing those checks again to add the real data. |
970 |
*/ |
971 |
oldlen = sl.length (); |
972 |
|
973 |
sl << uint16 (mask); |
974 |
|
975 |
unsigned char dummy; |
976 |
unsigned char *last_ext = &dummy; |
977 |
|
978 |
/* Darkness changed */ |
979 |
if (lastcell.count != d) |
980 |
{ |
981 |
mask |= 0x8; |
982 |
|
983 |
*last_ext |= 0x80; |
984 |
last_ext = &sl[sl.length ()]; |
985 |
sl << uint8 (d); |
986 |
} |
987 |
|
988 |
lastcell.count = d; |
989 |
|
990 |
mapspace &ms = m->at (nx, ny); |
991 |
ms.update (); |
992 |
|
993 |
// extmap handling |
994 |
uint8 stat_hp = 0; |
995 |
uint8 stat_width = 0; |
996 |
uint8 flags = 0; |
997 |
tag_t player = 0; |
998 |
|
999 |
// send hp information, if applicable |
1000 |
if (object *op = ms.faces_obj [0]) |
1001 |
if (op->is_head () && !op->invisible) |
1002 |
{ |
1003 |
if (op->stats.maxhp > op->stats.hp |
1004 |
&& op->stats.maxhp > 0 |
1005 |
&& (op->type == PLAYER |
1006 |
|| op->type == DOOR // does not work, have maxhp 0 |
1007 |
|| op->flag [FLAG_MONSTER] |
1008 |
|| op->flag [FLAG_ALIVE] |
1009 |
|| op->flag [FLAG_GENERATOR])) |
1010 |
{ |
1011 |
stat_hp = 255 - (op->stats.hp * 255 + 254) / op->stats.maxhp; |
1012 |
stat_width = op->arch->max_x - op->arch->x; //TODO: should be upper-left edge |
1013 |
} |
1014 |
|
1015 |
if (expect_false (op->has_dialogue ())) |
1016 |
flags |= 1; |
1017 |
|
1018 |
if (expect_false (op->type == PLAYER)) |
1019 |
player = op == ob ? pl->ob->count |
1020 |
: op == pl->ob ? ob->count |
1021 |
: op->count; |
1022 |
} |
1023 |
|
1024 |
if (expect_false (lastcell.stat_hp != stat_hp)) |
1025 |
{ |
1026 |
lastcell.stat_hp = stat_hp; |
1027 |
|
1028 |
mask |= 0x8; |
1029 |
*last_ext |= 0x80; |
1030 |
last_ext = &sl[sl.length ()]; |
1031 |
|
1032 |
sl << uint8 (5) << uint8 (stat_hp); |
1033 |
|
1034 |
if (stat_width > 1) |
1035 |
{ |
1036 |
*last_ext |= 0x80; |
1037 |
last_ext = &sl[sl.length ()]; |
1038 |
|
1039 |
sl << uint8 (6) << uint8 (stat_width); |
1040 |
} |
1041 |
} |
1042 |
|
1043 |
if (expect_false (lastcell.player != player)) |
1044 |
{ |
1045 |
lastcell.player = player; |
1046 |
|
1047 |
mask |= 0x8; |
1048 |
*last_ext |= 0x80; |
1049 |
last_ext = &sl[sl.length ()]; |
1050 |
|
1051 |
sl << uint8 (0x47) << uint8 (4) << (uint32)player; |
1052 |
} |
1053 |
|
1054 |
if (expect_false (lastcell.flags != flags)) |
1055 |
{ |
1056 |
lastcell.flags = flags; |
1057 |
|
1058 |
mask |= 0x8; |
1059 |
*last_ext |= 0x80; |
1060 |
last_ext = &sl[sl.length ()]; |
1061 |
|
1062 |
sl << uint8 (8) << uint8 (flags); |
1063 |
} |
1064 |
|
1065 |
// faces |
1066 |
|
1067 |
/* Floor face */ |
1068 |
if (update_space (sl, socket, ms, lastcell, 2)) |
1069 |
mask |= 0x4; |
1070 |
|
1071 |
/* Middle face */ |
1072 |
if (update_space (sl, socket, ms, lastcell, 1)) |
1073 |
mask |= 0x2; |
1074 |
|
1075 |
if (expect_false (ob->invisible) |
1076 |
&& ob->invisible & (ob->invisible < 50 ? 1 : 7) |
1077 |
&& ms.player () == ob) |
1078 |
{ |
1079 |
// force player to be visible to himself if invisible |
1080 |
if (lastcell.faces[0] != ob->face) |
1081 |
{ |
1082 |
lastcell.faces[0] = ob->face; |
1083 |
|
1084 |
mask |= 0x1; |
1085 |
sl << uint16 (ob->face); |
1086 |
|
1087 |
socket.send_faces (ob); |
1088 |
} |
1089 |
} |
1090 |
/* Top face */ |
1091 |
else if (update_space (sl, socket, ms, lastcell, 0)) |
1092 |
mask |= 0x1; |
1093 |
|
1094 |
/* Check to see if we are in fact sending anything for this |
1095 |
* space by checking the mask. If so, update the mask. |
1096 |
* if not, reset the len to that from before adding the mask |
1097 |
* value, so we don't send those bits. |
1098 |
*/ |
1099 |
if (mask & 0xf) |
1100 |
sl[oldlen + 1] = mask & 0xff; |
1101 |
else |
1102 |
sl.reset (oldlen); |
1103 |
} /* else this is a viewable space */ |
1104 |
ordered_mapwalk_end |
1105 |
|
1106 |
socket.flush_fx (); |
1107 |
|
1108 |
if (sl.length () > startlen || socket.sent_scroll) |
1109 |
{ |
1110 |
socket.send_packet (sl); |
1111 |
socket.sent_scroll = 0; |
1112 |
} |
1113 |
} |
1114 |
|
1115 |
/** |
1116 |
* This looks for any spells the player may have that have changed their stats. |
1117 |
* it then sends an updspell packet for each spell that has changed in this way |
1118 |
*/ |
1119 |
void |
1120 |
esrv_update_spells (player *pl) |
1121 |
{ |
1122 |
if (!pl->ns) |
1123 |
return; |
1124 |
|
1125 |
pl->ns->update_spells = false; |
1126 |
|
1127 |
if (!pl->ns->monitor_spells) |
1128 |
return; |
1129 |
|
1130 |
for (object *spell = pl->ob->inv; spell; spell = spell->below) |
1131 |
if (spell->type == SPELL) |
1132 |
{ |
1133 |
int flags = 0; |
1134 |
int val; |
1135 |
|
1136 |
/* check if we need to update it */ |
1137 |
val = SP_level_spellpoint_cost (pl->ob, spell, SPELL_MANA); |
1138 |
if (spell->cached_sp != val) |
1139 |
{ |
1140 |
spell->cached_sp = val; |
1141 |
flags |= UPD_SP_MANA; |
1142 |
} |
1143 |
|
1144 |
val = SP_level_spellpoint_cost (pl->ob, spell, SPELL_GRACE); |
1145 |
if (spell->cached_grace != val) |
1146 |
{ |
1147 |
spell->cached_grace = val; |
1148 |
flags |= UPD_SP_GRACE; |
1149 |
} |
1150 |
|
1151 |
val = casting_level (pl->ob, spell); |
1152 |
if (spell->cached_eat != val) |
1153 |
{ |
1154 |
spell->cached_eat = val; |
1155 |
flags |= UPD_SP_LEVEL; |
1156 |
} |
1157 |
|
1158 |
if (flags) |
1159 |
{ |
1160 |
packet sl; |
1161 |
|
1162 |
sl << "updspell " |
1163 |
<< uint8 (flags) |
1164 |
<< uint32 (spell->count); |
1165 |
|
1166 |
if (flags & UPD_SP_MANA ) sl << uint16 (spell->cached_sp); |
1167 |
if (flags & UPD_SP_GRACE) sl << uint16 (spell->cached_grace); |
1168 |
if (flags & UPD_SP_LEVEL) sl << uint16 (spell->cached_eat); |
1169 |
|
1170 |
pl->ns->send_packet (sl); |
1171 |
} |
1172 |
} |
1173 |
} |
1174 |
|
1175 |
void |
1176 |
esrv_remove_spell (player *pl, object *spell) |
1177 |
{ |
1178 |
if (!pl->ns->monitor_spells) |
1179 |
return; |
1180 |
|
1181 |
if (!pl || !spell || spell->env != pl->ob) |
1182 |
{ |
1183 |
LOG (llevError, "Invalid call to esrv_remove_spell"); |
1184 |
return; |
1185 |
} |
1186 |
|
1187 |
packet sl ("delspell"); |
1188 |
|
1189 |
sl << uint32 (spell->count); |
1190 |
|
1191 |
pl->ns->send_packet (sl); |
1192 |
} |
1193 |
|
1194 |
/* appends the spell *spell to the Socklist we will send the data to. */ |
1195 |
static void |
1196 |
append_spell (player *pl, packet &sl, object *spell) |
1197 |
{ |
1198 |
int skill = 0; |
1199 |
|
1200 |
if (!(spell->name)) |
1201 |
{ |
1202 |
LOG (llevError, "item number %d is a spell with no name.\n", spell->count); |
1203 |
return; |
1204 |
} |
1205 |
|
1206 |
/* store costs and damage in the object struct, to compare to later */ |
1207 |
spell->cached_sp = SP_level_spellpoint_cost (pl->ob, spell, SPELL_MANA); |
1208 |
spell->cached_grace = SP_level_spellpoint_cost (pl->ob, spell, SPELL_GRACE); |
1209 |
spell->cached_eat = casting_level (pl->ob, spell); |
1210 |
|
1211 |
/* figure out which skill it uses, if it uses one */ |
1212 |
if (spell->skill) |
1213 |
if (object *tmp = pl->find_skill (spell->skill)) |
1214 |
skill = CS_STAT_SKILLINFO + SKILL_INDEX (tmp); |
1215 |
|
1216 |
// spells better have a face |
1217 |
if (!spell->face) |
1218 |
{ |
1219 |
LOG (llevError, "%s: spell has no face, but face is mandatory.\n", &spell->name); |
1220 |
spell->face = face_find ("burnout.x11", blank_face); |
1221 |
} |
1222 |
|
1223 |
pl->ns->send_face (spell->face); |
1224 |
|
1225 |
/* send the current values */ |
1226 |
sl << uint32 (spell->count) |
1227 |
<< uint16 (spell->level) |
1228 |
<< uint16 (spell->casting_time) |
1229 |
<< uint16 (spell->cached_sp) |
1230 |
<< uint16 (spell->cached_grace) |
1231 |
<< uint16 (spell->cached_eat) |
1232 |
<< uint8 (skill) |
1233 |
<< uint32 (spell->path_attuned) |
1234 |
<< uint32 (spell->face) |
1235 |
<< data8 (spell->name); |
1236 |
|
1237 |
if (pl->ns->monitor_spells < 2) |
1238 |
sl << data16 (spell->msg); |
1239 |
} |
1240 |
|
1241 |
/** |
1242 |
* This tells the client to add the spell *ob, if *ob is NULL, then add |
1243 |
* all spells in the player's inventory. |
1244 |
*/ |
1245 |
void |
1246 |
esrv_add_spells (player *pl, object *spell) |
1247 |
{ |
1248 |
if (!pl) |
1249 |
{ |
1250 |
LOG (llevError, "esrv_add_spells, tried to add a spell to a NULL player"); |
1251 |
return; |
1252 |
} |
1253 |
|
1254 |
if (!pl->ns->monitor_spells) |
1255 |
return; |
1256 |
|
1257 |
packet sl ("addspell"); |
1258 |
|
1259 |
if (!spell) |
1260 |
{ |
1261 |
for (spell = pl->ob->inv; spell; spell = spell->below) |
1262 |
{ |
1263 |
/* were we to simply keep appending data here, we could exceed |
1264 |
* MAXSOCKBUF if the player has enough spells to add, we know that |
1265 |
* append_spells will always append 19 data bytes, plus 4 length |
1266 |
* bytes and 3 strings (because that is the spec) so we need to |
1267 |
* check that the length of those 3 strings, plus the 23 bytes, |
1268 |
* won't take us over the length limit for the socket, if it does, |
1269 |
* we need to send what we already have, and restart packet formation |
1270 |
*/ |
1271 |
if (spell->type != SPELL) |
1272 |
continue; |
1273 |
|
1274 |
/* Seeing crashes by overflowed buffers. Quick arithemetic seems |
1275 |
* to show add_spell is 26 bytes + 2 strings. However, the overun |
1276 |
* is hundreds of bytes off, so correcting 22 vs 26 doesn't seem |
1277 |
* like it will fix this |
1278 |
*/ |
1279 |
if (sl.length () > (MAXSOCKBUF - (26 + strlen (spell->name) + (spell->msg ? strlen (spell->msg) : 0)))) |
1280 |
{ |
1281 |
pl->ns->flush_fx (); |
1282 |
pl->ns->send_packet (sl); |
1283 |
|
1284 |
sl.reset (); |
1285 |
sl << "addspell "; |
1286 |
} |
1287 |
|
1288 |
append_spell (pl, sl, spell); |
1289 |
} |
1290 |
} |
1291 |
else if (spell->type != SPELL) |
1292 |
{ |
1293 |
LOG (llevError, "Asked to send a non-spell object as a spell"); |
1294 |
return; |
1295 |
} |
1296 |
else |
1297 |
append_spell (pl, sl, spell); |
1298 |
|
1299 |
if (sl.length () > MAXSOCKBUF) |
1300 |
cleanup ("buffer overflow in esrv_add_spells!"); |
1301 |
|
1302 |
/* finally, we can send the packet */ |
1303 |
pl->ns->flush_fx (); |
1304 |
pl->ns->send_packet (sl); |
1305 |
} |
1306 |
|
1307 |
//-GPL |
1308 |
|