server/socket/loop.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The author can be reached via e-mail to <crossfire@schmorp.de>
*/

/**
 * \file
 * Main client/server loops.
 *
 * \date 2003-12-02
 *
 * loop.c mainly deals with initialization and higher level socket
 * maintenance (checking for lost connections and if data has arrived.)
 * The reading of data is handled in ericserver.c
 */


#include <global.h>
#ifndef __CEXTRACT__
# include <sproto.h>
# include <sockproto.h>
#endif

#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif

#include <loader.h>
#include <newserver.h>

/*****************************************************************************
 * Start of command dispatch area.
 * The commands here are protocol commands. 
 ****************************************************************************/

/* Either keep this near the start or end of the file so it is
 * at least reasonablye easy to find.
 * There are really 2 commands - those which are sent/received
 * before player joins, and those happen after the player has joined.
 * As such, we have function types that might be called, so
 * we end up having 2 tables.
 */

typedef void (*func_uint8_int_ns) (char *, int, NewSocket *);

struct NsCmdMapping
{
  const char *cmdname;
  func_uint8_int_ns cmdproc;
};

typedef void (*func_uint8_int_pl) (char *, int, player *);
struct PlCmdMapping
{
  const char *cmdname;
  func_uint8_int_pl cmdproc;
  uint8 flag;
};

/**
 * Dispatch table for the server.
 *
 * CmdMapping is the dispatch table for the server, used in HandleClient,
 * which gets called when the client has input.  All commands called here 
 * use the same parameter form (char* data, int len, int clientnum.
 * We do implicit casts, because the data that is being passed is
 * unsigned (pretty much needs to be for binary data), however, most
 * of these treat it only as strings, so it makes things easier
 * to cast it here instead of a bunch of times in the function itself.
 * flag is 1 if the player must be in the playing state to issue the
 * command, 0 if they can issue it at any time.
 */
static struct PlCmdMapping plcommands[] = {
  {"examine", ExamineCmd, 1},
  {"apply", ApplyCmd, 1},
  {"move", MoveCmd, 1},
  {"reply", ReplyCmd, 0},
  {"command", PlayerCmd, 1},
  {"ncom", (func_uint8_int_pl) NewPlayerCmd, 1},
  {"lookat", LookAt, 1},
  {"lock", (func_uint8_int_pl) LockItem, 1},
  {"mark", (func_uint8_int_pl) MarkItem, 1},
  {"mapredraw", MapRedrawCmd, 0},       /* Added: phil */
  {"mapinfo", MapInfoCmd, 2},   /* CF+ */
  {"ext", ExtCmd, 2},           /* CF+ */
  {NULL, NULL, 0}               /* terminator */
};

/** Face-related commands */
static struct NsCmdMapping nscommands[] = {
  {"addme", AddMeCmd},
  {"askface", SendFaceCmd},     /* Added: phil */
  {"requestinfo", RequestInfo},
  {"setfacemode", SetFaceMode},
  {"setsound", SetSound},
  {"setup", SetUp},
  {"version", VersionCmd},
  {"toggleextendedinfos", ToggleExtendedInfos}, /*Added: tchize */
  {"toggleextendedtext", ToggleExtendedText},   /*Added: tchize */
  {"asksmooth", AskSmooth},     /*Added: tchize (smoothing technologies) */
  {NULL, NULL}                  /* terminator (I, II & III) */
};

/**
 * RequestInfo is sort of a meta command. There is some specific
 * request of information, but we call other functions to provide
 * that information.
 */
void
RequestInfo (char *buf, int len, NewSocket * ns)
{
  char *params = NULL, *cp;

  /* No match */
  char bigbuf[MAX_BUF];
  int slen;

  /* Set up replyinfo before we modify any of the buffers - this is used
   * if we don't find a match.
   */
  strcpy (bigbuf, "replyinfo ");
  slen = strlen (bigbuf);
  safe_strcat (bigbuf, buf, &slen, MAX_BUF);

  /* find the first space, make it null, and update the
   * params pointer.
   */
  for (cp = buf; *cp != '\0'; cp++)
    if (*cp == ' ')
      {
        *cp = '\0';
        params = cp + 1;
        break;
      }
  if (!strcmp (buf, "image_info"))
    send_image_info (ns, params);
  else if (!strcmp (buf, "image_sums"))
    send_image_sums (ns, params);
  else if (!strcmp (buf, "skill_info"))
    send_skill_info (ns, params);
  else if (!strcmp (buf, "spell_paths"))
    send_spell_paths (ns, params);
  else
    Write_String_To_Socket (ns, bigbuf, len);
}

/**
 * Handle client input.
 *
 * HandleClient is actually not named really well - we only get here once
 * there is input, so we don't do exception or other stuff here.
 * sock is the output socket information.  pl is the player associated
 * with this socket, null if no player (one of the init_sockets for just
 * starting a connection)
 */

void
HandleClient (NewSocket * ns, player *pl)
{
  int len = 0, i, cnt;
  char *data;

  /* Loop through this - maybe we have several complete packets here. */
  // limit to a few commands only, though, as to not monopolise the server
  for (cnt = 16; cnt--;)
    {
      /* If it is a player, and they don't have any speed left, we
       * return, and will read in the data when they do have time.
       */
      if (pl && pl->state == ST_PLAYING && pl->ob != NULL && pl->ob->speed_left < 0)
        {
          return;
        }

      i = SockList_ReadPacket (ns->fd, &ns->inbuf, MAXSOCKBUF - 1);

      if (i < 0)
        {
#ifdef ESRV_DEBUG
          LOG (llevDebug, "HandleClient: Read error on connection player %s\n", (pl ? pl->ob->name : "None"));
#endif
          /* Caller will take care of cleaning this up */
          ns->status = Ns_Dead;
          return;
        }
      /* Still dont have a full packet */
      if (i == 0)
        return;

//        //D//TODO//temporarily log long commands
//        if (ns->inbuf.len >= 40 && pl && pl->ob)
//          LOG (llevDebug, "HandleClient: long comamnd from <%s,%s> %d<%s>\n", pl->ob->name, ns->host, ns->inbuf.len, ns->inbuf.buf + 2);

      /* First, break out beginning word.  There are at least
       * a few commands that do not have any paremeters.  If
       * we get such a command, don't worry about trying
       * to break it up.
       */
      data = (char *) strchr ((char *) ns->inbuf.buf + 2, ' ');
      if (data)
        {
          *data = '\0';
          data++;
          len = ns->inbuf.len - (data - (char *) ns->inbuf.buf);
        }
      else
        len = 0;

      ns->inbuf.buf[ns->inbuf.len] = '\0';      /* Terminate buffer - useful for string data */
      for (i = 0; nscommands[i].cmdname != NULL; i++)
        {
          if (strcmp ((char *) ns->inbuf.buf + 2, nscommands[i].cmdname) == 0)
            {
              nscommands[i].cmdproc ((char *) data, len, ns);
              ns->inbuf.len = 0;
              return;           //D// not doing this causes random memory corruption
              goto next_packet;
            }
        }
      /* Player must be in the playing state or the flag on the
       * the command must be zero for the user to use the command -
       * otherwise, a player cam save, be in the play_again state, and
       * the map they were on gets swapped out, yet things that try to look
       * at the map causes a crash.  If the command is valid, but
       * one they can't use, we still swallow it up.
       */
      if (pl)
        for (i = 0; plcommands[i].cmdname != NULL; i++)
          {
            if (strcmp ((char *) ns->inbuf.buf + 2, plcommands[i].cmdname) == 0)
              {
                if (pl->state == ST_PLAYING || !(plcommands[i].flag & 1))
                  plcommands[i].cmdproc ((char *) data, len, pl);
                ns->inbuf.len = 0;
                //D// not doing this causes random memory corruption
                if (plcommands[i].flag & 2)
                  goto next_packet;
                return;
              }
          }
      /* If we get here, we didn't find a valid command.  Logging
       * this might be questionable, because a broken client/malicious
       * user could certainly send a whole bunch of invalid commands.
       */
      LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf.buf + 2);
    next_packet:
      ;
    }
}


/*****************************************************************************
 *
 * Low level socket looping - select calls and watchdog udp packet
 * sending.
 *
 ******************************************************************************/

#ifdef WATCHDOG

/**
 * Tell watchdog that we are still alive
 *
 * I put the function here since we should hopefully already be getting
 * all the needed include files for socket support 
 */

void
watchdog (void)
{
  static int fd = -1;
  static struct sockaddr_in insock;

  if (fd == -1)
    {
      struct protoent *protoent;

      if ((protoent = getprotobyname ("udp")) == NULL || (fd = socket (PF_INET, SOCK_DGRAM, protoent->p_proto)) == -1)
        {
          return;
        }
      insock.sin_family = AF_INET;
      insock.sin_port = htons ((unsigned short) 13325);
      insock.sin_addr.s_addr = inet_addr ("127.0.0.1");
    }
  sendto (fd, (void *) &fd, 1, 0, (struct sockaddr *) &insock, sizeof (insock));
}
#endif

void
flush_sockets (void)
{
  player *pl;

  for (pl = first_player; pl != NULL; pl = pl->next)
    if (pl->socket.status != Ns_Dead)
      Socket_Flush (&pl->socket);
}

/**
 * This checks the sockets for input and exceptions, does the right thing.
 *
 * A bit of this code is grabbed out of socket.c
 * There are 2 lists we need to look through - init_sockets is a list
 * 
 */
void
doeric_server (void)
{
  int i, pollret;
  fd_set tmp_read, tmp_exceptions, tmp_write;
  struct sockaddr_in addr;
  socklen_t addrlen = sizeof (struct sockaddr);
  player *pl, *next;

#ifdef CS_LOGSTATS
  if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
    write_cs_stats ();
#endif

  FD_ZERO (&tmp_read);
  FD_ZERO (&tmp_write);
  FD_ZERO (&tmp_exceptions);

  for (i = 0; i < socket_info.allocated_sockets; i++)
    {
      if (init_sockets[i].status == Ns_Dead)
        {
          free_newsocket (&init_sockets[i]);
          init_sockets[i].status = Ns_Avail;
          socket_info.nconns--;
        }
      else if (init_sockets[i].status != Ns_Avail)
        {
          FD_SET ((uint32) init_sockets[i].fd, &tmp_read);
          FD_SET ((uint32) init_sockets[i].fd, &tmp_write);
          FD_SET ((uint32) init_sockets[i].fd, &tmp_exceptions);
        }
    }

  /* Go through the players.  Let the loop set the next pl value,
   * since we may remove some
   */
  for (pl = first_player; pl != NULL;)
    {
      if (pl->socket.status == Ns_Dead)
        {
          player *npl = pl->next;

          save_player (pl->ob, 0);
          if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
            {
              terminate_all_pets (pl->ob);
              remove_ob (pl->ob);
            }
          leave (pl, 1);
          final_free_player (pl);
          pl = npl;
        }
      else
        {
          FD_SET ((uint32) pl->socket.fd, &tmp_read);
          FD_SET ((uint32) pl->socket.fd, &tmp_write);
          FD_SET ((uint32) pl->socket.fd, &tmp_exceptions);
          pl = pl->next;
        }
    }

  /* Reset timeout each time, since some OS's will change the values on
   * the return from select.
   */
  socket_info.timeout.tv_sec = 0;
  socket_info.timeout.tv_usec = 0;

  pollret = select (socket_info.max_filedescriptor, &tmp_read, &tmp_write, &tmp_exceptions, &socket_info.timeout);

  if (pollret == -1)
    {
      LOG (llevError, "select failed: %s\n", strerror (errno));
      return;
    }

  /* We need to do some of the processing below regardless */

/*    if (!pollret) return;*/

  /* Following adds a new connection */
  if (pollret && FD_ISSET (init_sockets[0].fd, &tmp_read))
    {
      int newsocknum = 0;

#ifdef ESRV_DEBUG
      LOG (llevDebug, "doeric_server: New Connection\n");
#endif
      /* If this is the case, all sockets currently in used */
      if (socket_info.allocated_sockets <= socket_info.nconns)
        {
          init_sockets = (NewSocket *) realloc (init_sockets, sizeof (NewSocket) * (socket_info.nconns + 1));
          if (!init_sockets)
            fatal (OUT_OF_MEMORY);
          newsocknum = socket_info.allocated_sockets;
          socket_info.allocated_sockets++;
          init_sockets[newsocknum].faces_sent_len = nrofpixmaps;
          init_sockets[newsocknum].faces_sent = (uint8 *) malloc (nrofpixmaps * sizeof (*init_sockets[newsocknum].faces_sent));
          if (!init_sockets[newsocknum].faces_sent)
            fatal (OUT_OF_MEMORY);
          init_sockets[newsocknum].status = Ns_Avail;
        }
      else
        {
          int j;

          for (j = 1; j < socket_info.allocated_sockets; j++)
            if (init_sockets[j].status == Ns_Avail)
              {
                newsocknum = j;
                break;
              }
        }
      init_sockets[newsocknum].fd = accept (init_sockets[0].fd, (struct sockaddr *) &addr, &addrlen);
      if (init_sockets[newsocknum].fd == -1)
        {
          LOG (llevError, "accept failed: %s\n", strerror (errno));
        }
      else
        {
          char buf[MAX_BUF];
          long ip;
          NewSocket *ns;

          ns = &init_sockets[newsocknum];

          ip = ntohl (addr.sin_addr.s_addr);
          sprintf (buf, "%ld.%ld.%ld.%ld", (ip >> 24) & 255, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);

          if (checkbanned (NULL, buf))
            {
              LOG (llevInfo, "Banned host tried to connect: [%s]\n", buf);
              close (init_sockets[newsocknum].fd);
              init_sockets[newsocknum].fd = -1;
            }
          else
            {
              InitConnection (ns, buf);
              socket_info.nconns++;
            }
        }
    }

  /* Check for any exceptions/input on the sockets */
  if (pollret)
    for (i = 1; i < socket_info.allocated_sockets; i++)
      {
        if (init_sockets[i].status == Ns_Avail)
          continue;
        if (FD_ISSET (init_sockets[i].fd, &tmp_exceptions))
          {
            free_newsocket (&init_sockets[i]);
            init_sockets[i].status = Ns_Avail;
            socket_info.nconns--;
            continue;
          }
        if (FD_ISSET (init_sockets[i].fd, &tmp_read))
          {
            HandleClient (&init_sockets[i], NULL);
          }
        if (FD_ISSET (init_sockets[i].fd, &tmp_write))
          {
            init_sockets[i].can_write = 1;
          }
      }

  /* This does roughly the same thing, but for the players now */
  for (pl = first_player; pl != NULL; pl = next)
    {

      next = pl->next;
      if (pl->socket.status == Ns_Dead)
        continue;

      if (FD_ISSET (pl->socket.fd, &tmp_write))
        {
          if (!pl->socket.can_write)
            {
#if 0
              LOG (llevDebug, "Player %s socket now write enabled\n", pl->ob->name);
#endif
              pl->socket.can_write = 1;
              write_socket_buffer (&pl->socket);
            }
          /* if we get an error on the write_socket buffer, no reason to
           * continue on this socket.
           */
          if (pl->socket.status == Ns_Dead)
            continue;
        }
      else
        pl->socket.can_write = 0;

      if (FD_ISSET (pl->socket.fd, &tmp_exceptions))
        {
          save_player (pl->ob, 0);
          if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
            {
              terminate_all_pets (pl->ob);
              remove_ob (pl->ob);
            }
          leave (pl, 1);
          final_free_player (pl);
        }
      else
        {
          HandleClient (&pl->socket, pl);
          /* If the player has left the game, then the socket status
           * will be set to this be the leave function.  We don't
           * need to call leave again, as it has already been called
           * once.
           */
          if (pl->socket.status == Ns_Dead)
            {
              save_player (pl->ob, 0);
              if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
                {
                  terminate_all_pets (pl->ob);
                  remove_ob (pl->ob);
                }
              leave (pl, 1);
              final_free_player (pl);
            }
          else
            {

              /* Update the players stats once per tick.  More efficient than
               * sending them whenever they change, and probably just as useful
               */
              esrv_update_stats (pl);
              if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
                {
                  esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
                  if (pl->last_weight != WEIGHT (pl->ob))
                    LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
                         (unsigned long) pl->last_weight, WEIGHT (pl->ob));
                }
              /* draw_client_map does sanity checking that map is
               * valid, so don't do it here.
               */
              draw_client_map (pl->ob);
              if (pl->socket.update_look)
                esrv_draw_look (pl->ob);
            }
        }
    }
}
Revision:	1.8
Committed:	Mon Dec 11 19:46:47 2006 UTC (17 years, 5 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+5 -7 lines
Log Message:	removed #ifn?def WIN32 from all files
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
5			Copyright (C) 1992 Frank Tore Johansen
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	root	1.7	The author can be reached via e-mail to <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			/**
25			* \file
26			* Main client/server loops.
27			*
28			* \date 2003-12-02
29			*
30			* loop.c mainly deals with initialization and higher level socket
31			* maintenance (checking for lost connections and if data has arrived.)
32			* The reading of data is handled in ericserver.c
33			*/
34
35
36			#include <global.h>
37			#ifndef __CEXTRACT__
38	root	1.6	# include <sproto.h>
39			# include <sockproto.h>
40	elmex	1.1	#endif
41
42	pippijn	1.8	#include <sys/types.h>
43			#include <sys/time.h>
44			#include <sys/socket.h>
45			#include <netinet/in.h>
46			#include <netdb.h>
47	elmex	1.1
48			#ifdef HAVE_UNISTD_H
49	root	1.6	# include <unistd.h>
50	elmex	1.1	#endif
51
52			#ifdef HAVE_ARPA_INET_H
53	root	1.6	# include <arpa/inet.h>
54	elmex	1.1	#endif
55
56			#include <loader.h>
57			#include <newserver.h>
58
59			/*****************************************************************************
60			* Start of command dispatch area.
61			* The commands here are protocol commands.
62			****************************************************************************/
63
64			/* Either keep this near the start or end of the file so it is
65			* at least reasonablye easy to find.
66			* There are really 2 commands - those which are sent/received
67			* before player joins, and those happen after the player has joined.
68			* As such, we have function types that might be called, so
69			* we end up having 2 tables.
70			*/
71
72	root	1.6	typedef void (func_uint8_int_ns) (char , int, NewSocket *);
73	elmex	1.1
74	root	1.6	struct NsCmdMapping
75			{
76			const char *cmdname;
77			func_uint8_int_ns cmdproc;
78	elmex	1.1	};
79
80	root	1.6	typedef void (func_uint8_int_pl) (char , int, player *);
81			struct PlCmdMapping
82			{
83			const char *cmdname;
84			func_uint8_int_pl cmdproc;
85			uint8 flag;
86	elmex	1.1	};
87
88			/**
89			* Dispatch table for the server.
90			*
91			* CmdMapping is the dispatch table for the server, used in HandleClient,
92			* which gets called when the client has input. All commands called here
93			* use the same parameter form (char* data, int len, int clientnum.
94			* We do implicit casts, because the data that is being passed is
95			* unsigned (pretty much needs to be for binary data), however, most
96			* of these treat it only as strings, so it makes things easier
97			* to cast it here instead of a bunch of times in the function itself.
98			* flag is 1 if the player must be in the playing state to issue the
99			* command, 0 if they can issue it at any time.
100			*/
101			static struct PlCmdMapping plcommands[] = {
102	root	1.6	{"examine", ExamineCmd, 1},
103			{"apply", ApplyCmd, 1},
104			{"move", MoveCmd, 1},
105			{"reply", ReplyCmd, 0},
106			{"command", PlayerCmd, 1},
107			{"ncom", (func_uint8_int_pl) NewPlayerCmd, 1},
108			{"lookat", LookAt, 1},
109			{"lock", (func_uint8_int_pl) LockItem, 1},
110			{"mark", (func_uint8_int_pl) MarkItem, 1},
111			{"mapredraw", MapRedrawCmd, 0}, /* Added: phil */
112			{"mapinfo", MapInfoCmd, 2}, /* CF+ */
113			{"ext", ExtCmd, 2}, /* CF+ */
114			{NULL, NULL, 0} /* terminator */
115	elmex	1.1	};
116
117			/** Face-related commands */
118			static struct NsCmdMapping nscommands[] = {
119	root	1.6	{"addme", AddMeCmd},
120			{"askface", SendFaceCmd}, /* Added: phil */
121			{"requestinfo", RequestInfo},
122			{"setfacemode", SetFaceMode},
123			{"setsound", SetSound},
124			{"setup", SetUp},
125			{"version", VersionCmd},
126			{"toggleextendedinfos", ToggleExtendedInfos}, /Added: tchize /
127			{"toggleextendedtext", ToggleExtendedText}, /Added: tchize /
128			{"asksmooth", AskSmooth}, /Added: tchize (smoothing technologies) /
129			{NULL, NULL} /* terminator (I, II & III) */
130	elmex	1.1	};
131
132			/**
133			* RequestInfo is sort of a meta command. There is some specific
134			* request of information, but we call other functions to provide
135			* that information.
136			*/
137	root	1.6	void
138			RequestInfo (char buf, int len, NewSocket ns)
139	elmex	1.1	{
140	root	1.6	char params = NULL, cp;
141
142			/* No match */
143			char bigbuf[MAX_BUF];
144			int slen;
145
146			/* Set up replyinfo before we modify any of the buffers - this is used
147			* if we don't find a match.
148			*/
149			strcpy (bigbuf, "replyinfo ");
150			slen = strlen (bigbuf);
151			safe_strcat (bigbuf, buf, &slen, MAX_BUF);
152
153			/* find the first space, make it null, and update the
154			* params pointer.
155			*/
156			for (cp = buf; *cp != '\0'; cp++)
157			if (*cp == ' ')
158			{
159			*cp = '\0';
160			params = cp + 1;
161			break;
162			}
163			if (!strcmp (buf, "image_info"))
164			send_image_info (ns, params);
165			else if (!strcmp (buf, "image_sums"))
166			send_image_sums (ns, params);
167			else if (!strcmp (buf, "skill_info"))
168			send_skill_info (ns, params);
169			else if (!strcmp (buf, "spell_paths"))
170			send_spell_paths (ns, params);
171			else
172			Write_String_To_Socket (ns, bigbuf, len);
173	elmex	1.1	}
174
175			/**
176			* Handle client input.
177			*
178			* HandleClient is actually not named really well - we only get here once
179			* there is input, so we don't do exception or other stuff here.
180			* sock is the output socket information. pl is the player associated
181			* with this socket, null if no player (one of the init_sockets for just
182			* starting a connection)
183			*/
184
185	root	1.6	void
186			HandleClient (NewSocket * ns, player *pl)
187	elmex	1.1	{
188	root	1.6	int len = 0, i, cnt;
189			char *data;
190	elmex	1.1
191	root	1.6	/* Loop through this - maybe we have several complete packets here. */
192			// limit to a few commands only, though, as to not monopolise the server
193			for (cnt = 16; cnt--;)
194			{
195			/* If it is a player, and they don't have any speed left, we
196			* return, and will read in the data when they do have time.
197			*/
198			if (pl && pl->state == ST_PLAYING && pl->ob != NULL && pl->ob->speed_left < 0)
199			{
200			return;
201	root	1.3	}
202	elmex	1.1
203	root	1.6	i = SockList_ReadPacket (ns->fd, &ns->inbuf, MAXSOCKBUF - 1);
204
205			if (i < 0)
206			{
207	elmex	1.1	#ifdef ESRV_DEBUG
208	root	1.6	LOG (llevDebug, "HandleClient: Read error on connection player %s\n", (pl ? pl->ob->name : "None"));
209	elmex	1.1	#endif
210	root	1.6	/* Caller will take care of cleaning this up */
211			ns->status = Ns_Dead;
212			return;
213	root	1.3	}
214	root	1.6	/* Still dont have a full packet */
215			if (i == 0)
216			return;
217	elmex	1.1
218			// //D//TODO//temporarily log long commands
219			// if (ns->inbuf.len >= 40 && pl && pl->ob)
220			// LOG (llevDebug, "HandleClient: long comamnd from <%s,%s> %d<%s>\n", pl->ob->name, ns->host, ns->inbuf.len, ns->inbuf.buf + 2);
221
222	root	1.6	/* First, break out beginning word. There are at least
223			* a few commands that do not have any paremeters. If
224			* we get such a command, don't worry about trying
225			* to break it up.
226			*/
227			data = (char ) strchr ((char ) ns->inbuf.buf + 2, ' ');
228			if (data)
229			{
230			*data = '\0';
231			data++;
232			len = ns->inbuf.len - (data - (char *) ns->inbuf.buf);
233			}
234			else
235			len = 0;
236
237			ns->inbuf.buf[ns->inbuf.len] = '\0'; /* Terminate buffer - useful for string data */
238			for (i = 0; nscommands[i].cmdname != NULL; i++)
239			{
240			if (strcmp ((char *) ns->inbuf.buf + 2, nscommands[i].cmdname) == 0)
241			{
242			nscommands[i].cmdproc ((char *) data, len, ns);
243			ns->inbuf.len = 0;
244			return; //D// not doing this causes random memory corruption
245			goto next_packet;
246	root	1.3	}
247			}
248	root	1.6	/* Player must be in the playing state or the flag on the
249			* the command must be zero for the user to use the command -
250			* otherwise, a player cam save, be in the play_again state, and
251			* the map they were on gets swapped out, yet things that try to look
252			* at the map causes a crash. If the command is valid, but
253			* one they can't use, we still swallow it up.
254			*/
255			if (pl)
256			for (i = 0; plcommands[i].cmdname != NULL; i++)
257			{
258			if (strcmp ((char *) ns->inbuf.buf + 2, plcommands[i].cmdname) == 0)
259			{
260	root	1.3	if (pl->state == ST_PLAYING \|\| !(plcommands[i].flag & 1))
261	root	1.6	plcommands[i].cmdproc ((char *) data, len, pl);
262			ns->inbuf.len = 0;
263	elmex	1.1	//D// not doing this causes random memory corruption
264			if (plcommands[i].flag & 2)
265			goto next_packet;
266			return;
267	root	1.6	}
268			}
269			/* If we get here, we didn't find a valid command. Logging
270			* this might be questionable, because a broken client/malicious
271			* user could certainly send a whole bunch of invalid commands.
272			*/
273			LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf.buf + 2);
274	elmex	1.1	next_packet:
275	root	1.6	;
276	elmex	1.1	}
277			}
278
279
280			/*****************************************************************************
281			*
282			* Low level socket looping - select calls and watchdog udp packet
283			* sending.
284			*
285			******************************************************************************/
286
287			#ifdef WATCHDOG
288	root	1.6
289	elmex	1.1	/**
290			* Tell watchdog that we are still alive
291			*
292			* I put the function here since we should hopefully already be getting
293			* all the needed include files for socket support
294			*/
295
296	root	1.6	void
297			watchdog (void)
298	elmex	1.1	{
299	root	1.6	static int fd = -1;
300	elmex	1.1	static struct sockaddr_in insock;
301
302	root	1.6	if (fd == -1)
303	elmex	1.1	{
304			struct protoent *protoent;
305
306	root	1.6	if ((protoent = getprotobyname ("udp")) == NULL \|\| (fd = socket (PF_INET, SOCK_DGRAM, protoent->p_proto)) == -1)
307			{
308			return;
309			}
310			insock.sin_family = AF_INET;
311			insock.sin_port = htons ((unsigned short) 13325);
312			insock.sin_addr.s_addr = inet_addr ("127.0.0.1");
313	elmex	1.1	}
314	root	1.6	sendto (fd, (void ) &fd, 1, 0, (struct sockaddr ) &insock, sizeof (insock));
315	elmex	1.1	}
316			#endif
317
318	root	1.6	void
319			flush_sockets (void)
320	elmex	1.1	{
321			player *pl;
322
323			for (pl = first_player; pl != NULL; pl = pl->next)
324			if (pl->socket.status != Ns_Dead)
325			Socket_Flush (&pl->socket);
326			}
327
328			/**
329			* This checks the sockets for input and exceptions, does the right thing.
330			*
331			* A bit of this code is grabbed out of socket.c
332			* There are 2 lists we need to look through - init_sockets is a list
333			*
334			*/
335	root	1.6	void
336			doeric_server (void)
337	elmex	1.1	{
338	root	1.6	int i, pollret;
339			fd_set tmp_read, tmp_exceptions, tmp_write;
340			struct sockaddr_in addr;
341			socklen_t addrlen = sizeof (struct sockaddr);
342			player pl, next;
343	elmex	1.1
344			#ifdef CS_LOGSTATS
345	root	1.6	if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
346			write_cs_stats ();
347	elmex	1.1	#endif
348
349	root	1.6	FD_ZERO (&tmp_read);
350			FD_ZERO (&tmp_write);
351			FD_ZERO (&tmp_exceptions);
352
353			for (i = 0; i < socket_info.allocated_sockets; i++)
354			{
355			if (init_sockets[i].status == Ns_Dead)
356			{
357			free_newsocket (&init_sockets[i]);
358			init_sockets[i].status = Ns_Avail;
359			socket_info.nconns--;
360			}
361			else if (init_sockets[i].status != Ns_Avail)
362			{
363			FD_SET ((uint32) init_sockets[i].fd, &tmp_read);
364			FD_SET ((uint32) init_sockets[i].fd, &tmp_write);
365			FD_SET ((uint32) init_sockets[i].fd, &tmp_exceptions);
366	root	1.3	}
367	elmex	1.1	}
368
369	root	1.6	/* Go through the players. Let the loop set the next pl value,
370			* since we may remove some
371			*/
372			for (pl = first_player; pl != NULL;)
373			{
374			if (pl->socket.status == Ns_Dead)
375			{
376			player *npl = pl->next;
377
378			save_player (pl->ob, 0);
379			if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
380			{
381			terminate_all_pets (pl->ob);
382			remove_ob (pl->ob);
383	root	1.3	}
384	root	1.6	leave (pl, 1);
385			final_free_player (pl);
386			pl = npl;
387			}
388			else
389			{
390			FD_SET ((uint32) pl->socket.fd, &tmp_read);
391			FD_SET ((uint32) pl->socket.fd, &tmp_write);
392			FD_SET ((uint32) pl->socket.fd, &tmp_exceptions);
393			pl = pl->next;
394	root	1.3	}
395	elmex	1.1	}
396
397	root	1.6	/* Reset timeout each time, since some OS's will change the values on
398			* the return from select.
399			*/
400			socket_info.timeout.tv_sec = 0;
401			socket_info.timeout.tv_usec = 0;
402	elmex	1.1
403	root	1.6	pollret = select (socket_info.max_filedescriptor, &tmp_read, &tmp_write, &tmp_exceptions, &socket_info.timeout);
404	elmex	1.1
405	root	1.6	if (pollret == -1)
406			{
407			LOG (llevError, "select failed: %s\n", strerror (errno));
408			return;
409	elmex	1.1	}
410
411	root	1.6	/* We need to do some of the processing below regardless */
412
413	elmex	1.1	/* if (!pollret) return;*/
414
415	root	1.6	/* Following adds a new connection */
416			if (pollret && FD_ISSET (init_sockets[0].fd, &tmp_read))
417			{
418			int newsocknum = 0;
419	elmex	1.1
420			#ifdef ESRV_DEBUG
421	root	1.6	LOG (llevDebug, "doeric_server: New Connection\n");
422	elmex	1.1	#endif
423	root	1.6	/* If this is the case, all sockets currently in used */
424			if (socket_info.allocated_sockets <= socket_info.nconns)
425			{
426			init_sockets = (NewSocket ) realloc (init_sockets, sizeof (NewSocket) (socket_info.nconns + 1));
427			if (!init_sockets)
428			fatal (OUT_OF_MEMORY);
429			newsocknum = socket_info.allocated_sockets;
430			socket_info.allocated_sockets++;
431			init_sockets[newsocknum].faces_sent_len = nrofpixmaps;
432			init_sockets[newsocknum].faces_sent = (uint8 ) malloc (nrofpixmaps sizeof (*init_sockets[newsocknum].faces_sent));
433			if (!init_sockets[newsocknum].faces_sent)
434			fatal (OUT_OF_MEMORY);
435			init_sockets[newsocknum].status = Ns_Avail;
436			}
437			else
438			{
439			int j;
440
441			for (j = 1; j < socket_info.allocated_sockets; j++)
442			if (init_sockets[j].status == Ns_Avail)
443			{
444			newsocknum = j;
445			break;
446			}
447			}
448			init_sockets[newsocknum].fd = accept (init_sockets[0].fd, (struct sockaddr *) &addr, &addrlen);
449			if (init_sockets[newsocknum].fd == -1)
450			{
451			LOG (llevError, "accept failed: %s\n", strerror (errno));
452			}
453			else
454			{
455			char buf[MAX_BUF];
456			long ip;
457			NewSocket *ns;
458
459			ns = &init_sockets[newsocknum];
460
461			ip = ntohl (addr.sin_addr.s_addr);
462			sprintf (buf, "%ld.%ld.%ld.%ld", (ip >> 24) & 255, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
463
464			if (checkbanned (NULL, buf))
465			{
466			LOG (llevInfo, "Banned host tried to connect: [%s]\n", buf);
467			close (init_sockets[newsocknum].fd);
468			init_sockets[newsocknum].fd = -1;
469	root	1.3	}
470	root	1.6	else
471			{
472			InitConnection (ns, buf);
473			socket_info.nconns++;
474	root	1.3	}
475			}
476	elmex	1.1	}
477
478	root	1.6	/* Check for any exceptions/input on the sockets */
479			if (pollret)
480			for (i = 1; i < socket_info.allocated_sockets; i++)
481			{
482			if (init_sockets[i].status == Ns_Avail)
483			continue;
484			if (FD_ISSET (init_sockets[i].fd, &tmp_exceptions))
485			{
486			free_newsocket (&init_sockets[i]);
487	root	1.3	init_sockets[i].status = Ns_Avail;
488			socket_info.nconns--;
489			continue;
490	root	1.6	}
491			if (FD_ISSET (init_sockets[i].fd, &tmp_read))
492			{
493			HandleClient (&init_sockets[i], NULL);
494			}
495			if (FD_ISSET (init_sockets[i].fd, &tmp_write))
496			{
497			init_sockets[i].can_write = 1;
498			}
499			}
500	elmex	1.1
501	root	1.6	/* This does roughly the same thing, but for the players now */
502			for (pl = first_player; pl != NULL; pl = next)
503			{
504	elmex	1.1
505	root	1.6	next = pl->next;
506			if (pl->socket.status == Ns_Dead)
507			continue;
508
509			if (FD_ISSET (pl->socket.fd, &tmp_write))
510			{
511			if (!pl->socket.can_write)
512			{
513	elmex	1.1	#if 0
514	root	1.6	LOG (llevDebug, "Player %s socket now write enabled\n", pl->ob->name);
515	elmex	1.1	#endif
516	root	1.6	pl->socket.can_write = 1;
517			write_socket_buffer (&pl->socket);
518	root	1.3	}
519	root	1.6	/* if we get an error on the write_socket buffer, no reason to
520			* continue on this socket.
521			*/
522			if (pl->socket.status == Ns_Dead)
523			continue;
524			}
525			else
526			pl->socket.can_write = 0;
527
528			if (FD_ISSET (pl->socket.fd, &tmp_exceptions))
529			{
530			save_player (pl->ob, 0);
531			if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
532			{
533			terminate_all_pets (pl->ob);
534			remove_ob (pl->ob);
535	root	1.3	}
536	root	1.6	leave (pl, 1);
537			final_free_player (pl);
538	root	1.3	}
539	root	1.6	else
540			{
541			HandleClient (&pl->socket, pl);
542			/* If the player has left the game, then the socket status
543			* will be set to this be the leave function. We don't
544			* need to call leave again, as it has already been called
545			* once.
546			*/
547			if (pl->socket.status == Ns_Dead)
548			{
549			save_player (pl->ob, 0);
550			if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
551			{
552			terminate_all_pets (pl->ob);
553			remove_ob (pl->ob);
554	root	1.3	}
555	root	1.6	leave (pl, 1);
556			final_free_player (pl);
557			}
558			else
559			{
560
561			/* Update the players stats once per tick. More efficient than
562			* sending them whenever they change, and probably just as useful
563			*/
564			esrv_update_stats (pl);
565			if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
566			{
567			esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
568			if (pl->last_weight != WEIGHT (pl->ob))
569			LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
570			(unsigned long) pl->last_weight, WEIGHT (pl->ob));
571	root	1.3	}
572	root	1.6	/* draw_client_map does sanity checking that map is
573			* valid, so don't do it here.
574			*/
575			draw_client_map (pl->ob);
576			if (pl->socket.update_look)
577			esrv_draw_look (pl->ob);
578	root	1.3	}
579			}
580	elmex	1.1	}
581			}