game_conv.c

打魔兽战网的都知道他是什么

    {
    case CLIENT_DIFFICULTY_NORMAL:
        return game_difficulty_normal;
    case CLIENT_DIFFICULTY_NIGHTMARE:
        return game_difficulty_nightmare;
    case CLIENT_DIFFICULTY_HELL:
        return game_difficulty_hell;
    case CLIENT_DIFFICULTY_HARDCORE_NORMAL:
        return game_difficulty_hardcore_normal;
    case CLIENT_DIFFICULTY_HARDCORE_NIGHTMARE:
        return game_difficulty_hardcore_nightmare;
    case CLIENT_DIFFICULTY_HARDCORE_HELL:
        return game_difficulty_hardcore_hell;
    default:
        return game_difficulty_none;
    }
}


static const char * _w3_decrypt_mapinfo(const char *enc)
{
    char	*mapinfo;
    char	*dec;
    unsigned    pos;
    unsigned char bitmask;

    if (!(mapinfo = xstrdup(enc))) {
	eventlog(eventlog_level_error, __FUNCTION__, "not enough memory to setup temporary buffer");
	return NULL;
    }

    dec = mapinfo;
    pos = 0;
    bitmask = 0; /* stupid gcc warning */
    while(*enc)
    {
        if (pos % 8)
        {
            *dec = *enc;
            if (!(bitmask & 0x1)) (*dec)--;
            dec++;
            bitmask >>= 1;
        } else
            bitmask = *enc >> 1;
        enc++;
        pos++;
    }
    *dec = '\0';

    return mapinfo;
}


extern int game_parse_info(t_game * game, char const * gameinfo)
{
    t_clienttag  clienttag;
    char *       save;
    char *       line1;
    char *       line2;
    char *       currtok;
    char const * unknown;
    char const * mapsize;
    char const * maxplayers;
    char const * speed;
    char const * maptype;
    char const * gametype;
    char const * option;
    char const * checksum;
    char const * tileset;
    char const * player;
    char const * mapname;
    unsigned int bngmapsize;
    unsigned int bngmaxplayers;
    unsigned int bngspeed;
    unsigned int bngmaptype;
    unsigned int bngtileset;
    
    if (!game)
    {
	eventlog(eventlog_level_error,__FUNCTION__,"got NULL game");
	return -1;
    }
    if (!gameinfo)
    {
	eventlog(eventlog_level_error,__FUNCTION__,"got NULL gameinfo");
	return -1;
    }
    
/*

BW 104:
9: recv class=bnet[0x01] type=CLIENT_STARTGAME4[0x1cff] length=74
0000:   FF 1C 4A 00 00 00 00 00   00 00 00 00 09 00 01 00    ..J.............
0010:   00 00 00 00 01 00 00 00   4E 4F 50 45 4E 41 4C 54    ........NOPENALT
0020:   59 00 00 2C 34 34 2C 31   34 2C 2C 32 2C 39 2C 31    Y..,44,14,,2,9,1
0030:   2C 33 65 33 37 61 38 34   63 2C 33 2C 52 6F 73 73    ,3e37a84c,3,Ross
0040:   0D 41 73 68 72 69 67 6F   0D 00                      .Ashrigo..

Diablo:
7: cli class=bnet[0x01] type=CLIENT_STARTGAME3[0x1aff] length=105
0000:   FF 1A 69 00 01 00 00 00   00 00 00 00 00 00 00 00    ..i.............
0010:   0F 00 00 00 00 00 00 00   E0 17 00 00 61 73 64 66    ............asdf
0020:   61 73 64 66 61 73 64 66   61 73 64 66 32 00 61 73    asdfasdfasdf2.as
0030:   64 66 61 73 64 66 73 61   64 66 61 73 64 66 32 00    dfasdfsadfasdf2.
0040:   30 0D 7A 62 6E 7A 62 6E   7A 62 6E 0D 4C 54 52 44    0.zbnzbnzbn.LTRD
0050:   20 31 20 30 20 30 20 33   30 20 31 30 20 32 30 20     1 0 0 30 10 20 
0060:   32 35 20 31 30 30 20 30   00                         25 100 0.

10: recv class=bnet[0x01] type=CLIENT_STARTGAME3[0x1aff] length=72
0000:   FF 1A 48 00 00 00 00 00   00 00 00 00 00 00 00 00    ..H.............
0010:   0F 00 00 00 00 00 00 00   E0 17 00 00 61 6E 73 00    ............ans.
0020:   00 30 0D 77 61 72 72 69   6F 72 0D 4C 54 52 44 20    .0.warrior.LTRD
0030:   31 20 30 20 30 20 33 30   20 31 30 20 32 30 20 32    1 0 0 30 10 20 2
0040:   35 20 31 30 30 20 30 00                              5 100 0.


Warcraft:
4: srv class=bnet[0x01] type=SERVER_GAMELISTREPLY[0x09ff] length=524
0000:   FF 09 0C 02 05 00 00 00   02 00 01 00 09 04 00 00    ................
0010:   02 00 17 E0 D0 C6 66 F0   00 00 00 00 00 00 00 00    ......f.........
0020:   04 00 00 00 74 00 00 00   48 65 79 77 6F 6F 64 73    ....t...Heywoods
0030:   20 47 4F 57 32 76 32 00   00 2C 2C 2C 36 2C 32 2C     GOW2v2..,,,6,2,
0040:   32 2C 31 2C 31 39 37 33   64 35 66 32 2C 33 30 30    2,1,1973d5f2,300
0050:   30 2C 48 65 79 77 6F 6F   64 0D 47 61 72 64 65 6E    0,Heywood.Garden
0060:   20 6F 66 20 77 61 72 20   42 4E 45 2E 70 75 64 0D     of war BNE.pud.
0070:   00 09 00 02 00 09 04 00   00 02 00 17 E0 CF 45 3E    ..............E>
0080:   65 00 00 00 00 00 00 00   00 10 00 00 00 11 00 00    e...............
0090:   00 67 6F 77 20 6C 61 64   64 65 72 20 31 76 31 00    .gow ladder 1v1.
00A0:   00 2C 2C 2C 36 2C 32 2C   39 2C 32 2C 65 66 38 34    .,,,6,2,9,2,ef84
00B0:   33 61 35 33 2C 2C 77 63   73 63 6D 61 73 74 65 72    3a53,,wcscmaster
00C0:   0D 47 61 72 64 65 6E 20   6F 66 20 77 61 72 20 42    .Garden of war B
00D0:   4E 45 2E 70 75 64 0D 00   09 00 01 00 09 04 00 00    NE.pud..........
00E0:   02 00 17 E0 98 CE 7C E2   00 00 00 00 00 00 00 00    ......|.........
00F0:   04 00 00 00 4D 00 00 00   4C 61 64 64 65 72 20 46    ....M...Ladder F
0100:   46 41 20 6F 6E 6C 79 00   00 2C 2C 2C 36 2C 32 2C    FA only..,,,6,2,
0110:   39 2C 31 2C 61 65 32 66   61 61 62 37 2C 2C 6B 69    9,1,ae2faab7,,ki
0120:   6C 6F 67 72 61 6D 0D 50   6C 61 69 6E 73 20 6F 66    logram.Plains of
0130:   20 73 6E 6F 77 20 42 4E   45 2E 70 75 64 0D 00 0F     snow BNE.pud...
0140:   00 04 00 09 04 00 00 02   00 17 E0 C6 0B 13 3C 00    ..............<.
0150:   00 00 00 00 00 00 00 04   00 00 00 BE 00 00 00 4C    ...............L
0160:   61 64 64 65 72 20 31 20   6F 6E 20 31 00 00 2C 2C    adder 1 on 1..,,
0170:   2C 36 2C 32 2C 66 2C 34   2C 66 63 63 35 38 65 34    ,6,2,f,4,fcc58e4
0180:   61 2C 37 32 30 30 2C 49   63 65 36 39 62 75 72 67    a,7200,Ice69burg
0190:   0D 46 6F 72 65 73 74 20   54 72 61 69 6C 20 42 4E    .Forest Trail BN
01A0:   45 2E 70 75 64 0D 00 0F   00 04 00 09 04 00 00 02    E.pud...........
01B0:   00 04 15 D1 F4 B6 6A 00   00 00 00 00 00 00 00 04    ......j.........
01C0:   00 00 00 C8 03 00 00 52   6F 63 6B 20 49 74 21 21    .......Rock It!!
01D0:   20 32 76 32 2B 00 00 2C   2C 2C 38 2C 31 2C 66 2C     2v2+..,,,8,1,f,
01E0:   34 2C 62 30 36 38 63 62   34 62 2C 66 30 30 30 2C    4,b068cb4b,f000,
01F0:   6E 75 66 74 63 72 6F 77   0D 43 72 6F 73 73 68 61    nuftcrow.Crossha
0200:   69 72 20 42 4E 45 2E 70   75 64 0D 00                ir BNE.pud..

FIXME:
Note the map size and max players fields are empty. Does WCII have different
map sizes and starting positions? If so, are they reported here?
Also note the map tileset is "3000". Maybe this isn't the tileset for WCII
but instead the starting gold or something.

FIXME:
Also, what is the upper player limit on WCII... 8 like on Starcraft?
*/
    
    if (!(clienttag = game_get_clienttag(game)))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"NULL clienttag for game?");
	return -1;
    }

    if (clienttag==CLIENTTAG_DIABLORTL_UINT ||
	clienttag==CLIENTTAG_DIABLOSHR_UINT)
    {
	game_set_maxplayers(game,4);
	eventlog(eventlog_level_debug,__FUNCTION__,"no gameinfo for Diablo");
	return 0;
    }
    else if (clienttag==CLIENTTAG_DIABLO2DV_UINT ||
	     clienttag==CLIENTTAG_DIABLO2XP_UINT)
    {
        if ((game->type == game_type_diablo2closed) &&
	    (!strlen(gameinfo)))
	
	{
	  /* D2 closed games are handled by d2cs so we can have only have a generic startgame4
	     without any info :(, this fix also a memory leak for description allocation */
	  game_set_difficulty(game,game_difficulty_none);
	  game_set_description(game, "");
	}
	else
	{
	  char         difficulty[2];
	  unsigned int bngdifficulty;
	  
	  if (!strlen(gameinfo)) 
	  {
	      eventlog(eventlog_level_info,__FUNCTION__, "got empty gameinfo (from D2 client)");
	      return -1;
	  }
	
	  difficulty[0] = gameinfo[0];
	  difficulty[1] = '\0';
	  if (str_to_uint(difficulty,&bngdifficulty)<0)
	    {
	      eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing difficulty) \"%s\"",gameinfo);
	      return -1;
	    }
	  game_set_difficulty(game,bngdifficulty);
	  game_set_description(game,&gameinfo[1]);

	  if ((game->type == game_type_diablo2closed))
	  {
	    eventlog(eventlog_level_debug,__FUNCTION__,"D2 bug workarround needed (open games tagged as closed)");
	    game->type = game_type_diablo2open;
	  }
	}
	return 0;
    }
    else if (clienttag==CLIENTTAG_WARCRAFT3_UINT ||
	     clienttag==CLIENTTAG_WAR3XP_UINT)
    {
/*  Warcraft 3 game info format -- by Soar
    0x00 -- 1 byte  (char, Empty slots)
    0x01 -- 8 bytes (char[8], Count of games created)

From offset 0x11 there is a bitmask byte before every 7 bytes, offset 0x09 to 0x10 also has bitmask 0.
Bit 0 corresponds to byte 0, bit 1 to byte 1, and so on.
Except offset 0x09, only Byte 1-7 contribute to the info data, bit 0 seems to be always 1;
Decoding these bytes works as follows:
If the corresponding bit is a '1' then the character is moved over directly.
If the corresponding bit is a '0' then subtract 1 from the character.
(We decode info data and remove the bitmask bytes from info data in following description)
    0x09 -- 5 bytes (char[5], map options)
    0x0e -- 1 bytes (0, seems to be a seperate sign)
    0x0f -- 2 bytes (short, mapsize x)
    0x11 -- 2 bytes (short, mapsize y)
    0x13 -- 4 bytes (long, unknown, map checksum ?)
    0x17 -- n bytes (string, mapname \0 terminated)
    0x17+n -- m bytes (string, game creator \0 terminated, but we already set this to game before, :P)
    0x17+n+m -- 2 bytes: \0 \0 (first \0 might be a reserved string for password, but blizzard didn't implement it, second \0 is the info string end sign)
*/
        const char *pstr;

	if (!strlen(gameinfo)) 
	{
	    eventlog(eventlog_level_info,__FUNCTION__, "got empty gameinfo (from W3 client)");
	    return -1;
	}
    
	if (strlen(gameinfo) < 0xf + 2 + 1 + 2 + 4) {
	    eventlog(eventlog_level_error, __FUNCTION__, "got too short W3 mapinfo");
	    return -1;
	}
        pstr = gameinfo + 9;
	pstr = _w3_decrypt_mapinfo(pstr);
	if (!pstr) return -1;
	/* after decryption we dont have the mask bytes anymore so offsets need
	 * to be adjusted acordingly */
        game_set_speed(game,w3speed_to_gspeed(bn_byte_get(*((bn_byte*)(pstr)))));
        game_set_mapsize_x(game, bn_short_get(*((bn_short*)(pstr + 5))));
        game_set_mapsize_y(game, bn_short_get(*((bn_short*)(pstr + 7))));
        game_set_mapname(game, pstr + 13);
	xfree((void*)pstr);

	return 0;
    }

    /* otherwise it's Starcraft, Brood War, or Warcraft II */
    if (!(save = xstrdup(gameinfo)))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"could not allocate memory for save");
	return -1;
    }
    
    if (!(line1  = strtok(save,"\r"))) /* actual game info fields */
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing line1) \"%s\"",gameinfo);
	xfree(save);
	return -1;
    }
    if (!(line2  = strtok(NULL,"\r")))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing player) \"%s\"",gameinfo);
	xfree(save);
	return -1;
    }
    /* is there room for another field after that? */
    
    /*
     * This is the same as the normal strtok() function but it doesn't skip over
     * empty entries.  The C-library strtok() will skip past entries like 12,,3
     * and rather than you being able to get "12", "", "3" you get "12", "3".
     * Since some values returned by the client contain these empty entries we
     * need this.  Unlike strtok() all state is recorded in the first argument.
     */
    currtok = line1;
    if (!(unknown    = strsep(&currtok,","))) /* skip past first field (always empty?) */
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing unknown)");
	xfree(save);
	return -1;
    }
    if (!(mapsize    = strsep(&currtok,",")))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing mapsize)");
	xfree(save);
	return -1;
    }
    if (!(maxplayers = strsep(&currtok,","))) /* for later use (FIXME: what is upper field, max observers?) */
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing maxplayers)");
	xfree(save);
	return -1;
    }
    if (!(speed      = strsep(&currtok,",")))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing speed)");
	xfree(save);
	return -1;
    }
    if (!(maptype    = strsep(&currtok,",")))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing maptype)");
	xfree(save);
	return -1;
    }
    if (!(gametype   = strsep(&currtok,","))) /* this is set from another field */
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing gametype)");
	xfree(save);
	return -1;
    }
    if (!(option     = strsep(&currtok,","))) /* this is set from another field */
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing option)");
	xfree(save);
	return -1;
    }
    if (!(checksum   = strsep(&currtok,","))) /* FIXME */
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing checksum)");
	xfree(save);
	return -1;
    }
    if (!(tileset    = strsep(&currtok,",")))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing tileset)");
	xfree(save);
	return -1;
    }
    if (!(player     = strsep(&currtok,",")))
    {
	eventlog(eventlog_level_error,__FUNCTION__,"bad gameinfo format (missing player)");
	xfree(save);
	return -1;
    }
    
    mapname = line2; /* only one item on this line */
    
    eventlog(eventlog_level_debug,__FUNCTION__,"got info \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\"", mapsize, maxplayers, speed, maptype, gametype, option, checksum, tileset, player, mapname);
    
    /* The map size is determined by breaking the number into two pieces and
     * multiplying each piece by 32.
     * for example, 34 = (32*3) x (32*4) = 96 x 128
     */
    /* special handling for mapsize. empty is 256x256 */
    if ((mapsize[0]=='\0') || (str_to_uint(mapsize,&bngmapsize)<0))
	bngmapsize = 88; /* 256x256 */
    game_set_mapsize_x(game,(bngmapsize/10)*32);
    game_set_mapsize_y(game,(bngmapsize%10)*32);
    
    /* special handling for maxplayers, empty is 8 */
    if ((maxplayers[0]=='\0') || (str_to_uint(maxplayers,&bngmaxplayers)<0))
	bngmaxplayers = 8;
    game_set_maxplayers(game,(bngmaxplayers%10));
    
    /* special handling for gamespeed. empty is fast */
    if ((speed[0]=='\0') || ( str_to_uint(speed,&bngspeed)<0))
	bngspeed = CLIENT_GAMESPEED_FAST;
    game_set_speed(game,bngspeed_to_gspeed(bngspeed));
    
    /* special handling for maptype. empty is self-made */
    if ((maptype[0]=='\0') || (str_to_uint(maptype,&bngmaptype)<0))
	bngmaptype = CLIENT_MAPTYPE_SELFMADE;
    game_set_maptype(game,bngmaptype_to_gmaptype(bngmaptype));
    
    /* special handling for tileset. empty is badlands */
    if ((tileset[0]=='\0') || (str_to_uint(tileset,&bngtileset)<0))
	bngtileset = CLIENT_TILESET_BADLANDS;
    game_set_tileset(game,bngtileset_to_gtileset(bngtileset));
    
    game_set_mapname(game,mapname);
    
    xfree(save);
    
    return 0;
}