server/socket/image.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2001 Mark Wedel
    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
 * Image related communication
 *
 *  \date 2003-12-02
 *
 * This file deals with the image related communication to the
 * client.  I've located all the functions in this file - this
 * localizes it more, and means that we don't need to declare
 * things like all the structures as globals.
 */

#include <global.h>
#include <sproto.h>

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

#define MAX_FACE_SETS   20  /**< Maximum number of image sets the program will handle */

/** Information about one image */
typedef struct FaceInfo
{

  uint8 *data;              /**< image data */

  uint16 datalen;           /**< length of the xpm data */

  uint32 checksum;          /**< Checksum of face data */
} FaceInfo;

/** Information about one face set */
typedef struct
{

  char *prefix;         /**< */
  char *fullname;

  uint8 fallback;       /**< faceset to use when an image is not found in this faceset */
  char *size;
  char *extension;
  char *comment;

  FaceInfo *faces;      /**< images in this faceset */
} FaceSets;

static FaceSets facesets[MAX_FACE_SETS];    /**< All facesets */

/**
 * Checks specified faceset is valid
 * \param fsn faceset number
 */
int
is_valid_faceset (int fsn)
{
  if (fsn >= 0 && fsn < MAX_FACE_SETS && facesets[fsn].prefix)
    return TRUE;
  return FALSE;
}

/**
 * Frees all faceset information
 */
void
free_socket_images (void)
{
  int num, q;

  for (num = 0; num < MAX_FACE_SETS; num++)
    {
      if (facesets[num].prefix)
        {
          for (q = 0; q < nrofpixmaps; q++)
            if (facesets[num].faces[q].data)
              free (facesets[num].faces[q].data);
          free (facesets[num].prefix);
          free (facesets[num].fullname);
          free (facesets[num].size);
          free (facesets[num].extension);
          free (facesets[num].comment);
          free (facesets[num].faces);
        }
    }
}

/**
 * This returns the set we will actually use when sending
 * a face.  This is used because the image files may be sparse.
 * This function is recursive.  imageno is the face number we are
 * trying to send
 *
 * If face is not found in specified faceset, tries with 'fallback' faceset.
 *
 * \param faceset faceset to check
 * \param imageno image number
 *
 */
static int
get_face_fallback (int faceset, int imageno)
{
  /* faceset 0 is supposed to have every image, so just return.  Doing
   * so also prevents infinite loops in the case if it not having
   * the face, but in that case, we are likely to crash when we try
   * to access the data, but that is probably preferable to an infinite
   * loop.
   */
  if (faceset == 0)
    return 0;

  if (!facesets[faceset].prefix)
    {
      LOG (llevError, "get_face_fallback called with unused set (%d)?\n", faceset);
      return 0;                 /* use default set */
    }
  if (facesets[faceset].faces[imageno].data)
    return faceset;
  return get_face_fallback (facesets[faceset].fallback, imageno);
}

/**
 * Checks fallback are correctly defined.
 * This is a simple recursive function that makes sure the fallbacks
 * are all proper (eg, the fall back to defined sets, and also
 * eventually fall back to 0).  At the top level, togo is set to MAX_FACE_SETS,
 * if togo gets to zero, it means we have a loop.
 * This is only run when we first load the facesets.
 */
static void
check_faceset_fallback (int faceset, int togo)
{
  int fallback = facesets[faceset].fallback;

  /* proper case - falls back to base set */
  if (fallback == 0)
    return;

  if (!facesets[fallback].prefix)
    {
      LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback);
      abort ();
    }
  togo--;
  if (togo == 0)
    {
      LOG (llevError, "Infinite loop found in facesets. aborting.\n");
      abort ();
    }
  check_faceset_fallback (fallback, togo);
}

#define MAX_IMAGE_SIZE 10000

/**
 * Loads all the image types into memory.
 *
 *  This  way, we can easily send them to the client.  We should really do something
 * better than abort on any errors - on the other hand, these are all fatal
 * to the server (can't work around them), but the abort just seems a bit
 * messy (exit would probably be better.)
 *
 * Couple of notes:  We assume that the faces are in a continous block.
 * This works fine for now, but this could perhaps change in the future
 *
 * Function largely rewritten May 2000 to be more general purpose.
 * The server itself does not care what the image data is - to the server,
 * it is just data it needs to allocate.  As such, the code is written
 * to do such.
 */

void
read_client_images (void)
{
  char filename[400];
  char buf[HUGE_BUF];
  char *cp, *cps[7];
  FILE *infile;
  int num, len, compressed, fileno, i, badline;

  memset (facesets, 0, sizeof (facesets));
  sprintf (filename, "%s/image_info", settings.datadir);
  if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
    {
      LOG (llevError, "Unable to open %s\n", filename);
      abort ();
    }
  while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
    {
      badline = 0;

      if (buf[0] == '#')
        continue;
      if (!(cps[0] = strtok (buf, ":")))
        badline = 1;
      for (i = 1; i < 7; i++)
        {
          if (!(cps[i] = strtok (NULL, ":")))
            badline = 1;
        }
      if (badline)
        {
          LOG (llevError, "Bad line in image_info file, ignoring line:\n  %s", buf);
        }
      else
        {
          len = atoi (cps[0]);
          if (len >= MAX_FACE_SETS)
            {
              LOG (llevError, "To high a setnum in image_info file: %d > %d\n", len, MAX_FACE_SETS);
              abort ();
            }
          facesets[len].prefix = strdup_local (cps[1]);
          facesets[len].fullname = strdup_local (cps[2]);
          facesets[len].fallback = atoi (cps[3]);
          facesets[len].size = strdup_local (cps[4]);
          facesets[len].extension = strdup_local (cps[5]);
          facesets[len].comment = strdup_local (cps[6]);
        }
    }
  close_and_delete (infile, compressed);
  for (i = 0; i < MAX_FACE_SETS; i++)
    {
      if (facesets[i].prefix)
        check_faceset_fallback (i, MAX_FACE_SETS);
    }
  /* Loaded the faceset information - now need to load up the
   * actual faces.
   */

  for (fileno = 0; fileno < MAX_FACE_SETS; fileno++)
    {
      /* if prefix is not set, this is not used */
      if (!facesets[fileno].prefix)
        continue;
      facesets[fileno].faces = (FaceInfo *) calloc (nrofpixmaps, sizeof (FaceInfo));

      sprintf (filename, "%s/crossfire.%d", settings.datadir, fileno);
      LOG (llevDebug, "Loading image file %s\n", filename);

      if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
        {
          LOG (llevError, "Unable to open %s\n", filename);
          abort ();
        }
      while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
        {
          if (strncmp (buf, "IMAGE ", 6) != 0)
            {
              LOG (llevError, "read_client_images:Bad image line - not IMAGE, instead\n%s", buf);
              abort ();
            }
          num = atoi (buf + 6);
          if (num < 0 || num >= nrofpixmaps)
            {
              LOG (llevError, "read_client_images: Image num %d not in 0..%d\n%s", num, nrofpixmaps, buf);
              abort ();
            }
          /* Skip accross the number data */
          for (cp = buf + 6; *cp != ' '; cp++);
          len = atoi (cp);
          if (len == 0 || len > MAX_IMAGE_SIZE)
            {
              LOG (llevError, "read_client_images: length not valid: %d > %d \n%s", len, MAX_IMAGE_SIZE, buf);
              abort ();
            }
          /* We don't actualy care about the name of the image that
           * is embedded in the image file, so just ignore it.
           */
          facesets[fileno].faces[num].datalen = len;
          facesets[fileno].faces[num].data = (uint8 *) malloc (len);
          if ((i = fread (facesets[fileno].faces[num].data, len, 1, infile)) != 1)
            {
              LOG (llevError, "read_client_images: Did not read desired amount of data, wanted %d, got %d\n%s", len, i, buf);
              abort ();
            }
          facesets[fileno].faces[num].checksum = 0;
          for (i = 0; i < len; i++)
            {
              ROTATE_RIGHT (facesets[fileno].faces[num].checksum);
              facesets[fileno].faces[num].checksum += facesets[fileno].faces[num].data[i];
              facesets[fileno].faces[num].checksum &= 0xffffffff;
            }
        }
      close_and_delete (infile, compressed);
    }                           /* For fileno < MAX_FACE_SETS */
}

/**
 * Client tells us what type of faces it wants.  Also sets
 * the caching attribute.
 *
 */

void
SetFaceMode (char *buf, int len, client_socket *ns)
{
  int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE);

  if (mode == CF_FACE_NONE)
    ns->facecache = 1;
  else if (mode != CF_FACE_PNG)
    {
      packet sl;
      sl.printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode.  Will use Png");
      ns->send_packet (sl);
    }

  if (mask)
    ns->facecache = 1;
}

/**
 * Client has requested pixmap that it somehow missed getting.
 * This will be called often if the client is
 * caching images.
 */

void
SendFaceCmd (char *buff, int len, client_socket * ns)
{
  long tmpnum = atoi (buff);
  short facenum = tmpnum & 0xffff;

  if (facenum != 0)
    esrv_send_face (ns, facenum, 1);
}

/**
 * Sends a face to a client if they are in pixmap mode
 * nothing gets sent in bitmap mode. 
 * If nocache is true (nonzero), ignore the cache setting from the client -
 * this is needed for the askface, in which we really do want to send the
 * face (and askface is the only place that should be setting it).  Otherwise,
 * we look at the facecache, and if set, send the image name.
 */

void
esrv_send_face (client_socket *ns, short face_num, int nocache)
{
  char fallback;

  if (face_num <= 0 || face_num >= nrofpixmaps)
    {
      LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num);
      return;
    }

  packet sl;
  fallback = get_face_fallback (ns->faceset, face_num);

  if (facesets[fallback].faces[face_num].data == NULL)
    {
      LOG (llevError, "esrv_send_face: faces[%d].data == NULL\n", face_num);
      return;
    }

  if (ns->facecache && !nocache)
    {
      sl << (ns->image2 ? "face2 " : "face1 ")
         << uint16 (face_num);

      if (ns->image2)
        sl << uint8 (fallback);

      sl << uint32 (facesets[fallback].faces[face_num].checksum)
         << new_faces[face_num].name;

      ns->send_packet (sl);
    }
  else
    {
      sl << (ns->image2 ? "image2 " : "image ")
         << uint32 (face_num);

      if (ns->image2)
        sl << uint8 (fallback);

      sl << uint32 (facesets[fallback].faces[face_num].datalen)
         << data (facesets[fallback].faces[face_num].data, facesets[fallback].faces[face_num].datalen);

      ns->send_packet (sl);
    }

  ns->faces_sent[face_num] |= NS_FACESENT_FACE;
}

/**
 * Sends the number of images, checksum of the face file,
 * and the image_info file information.  See the doc/Developers/protocol
 * if you want further detail.
 */

void
send_image_info (client_socket * ns, char *params)
{
  packet sl;

  sl.printf ("replyinfo image_info\n%d\n%d\n", nrofpixmaps - 1, bmaps_checksum);

  for (int i = 0; i < MAX_FACE_SETS; i++)
    if (facesets[i].prefix)
      sl.printf ("%d:%s:%s:%d:%s:%s:%s",
                 i, facesets[i].prefix, facesets[i].fullname, facesets[i].fallback,
                 facesets[i].size, facesets[i].extension, facesets[i].comment);

  ns->send_packet (sl);
}

/**
 * Sends requested face information.
 * \param ns socket to send to
 * \param params contains first and last index of face
 *
 * For each image in [start..stop] sends
 *  - checksum
 *  - name
 */
void
send_image_sums (client_socket * ns, char *params)
{
  int start, stop;
  char *cp, buf[MAX_BUF];

  packet sl;

  start = atoi (params);
  for (cp = params; *cp != '\0'; cp++)
    if (*cp == ' ')
      break;

  stop = atoi (cp);
  if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= nrofpixmaps)
    {
      sl.printf ("replyinfo image_sums %d %d", start, stop);
      ns->send_packet (sl);
      sl.reset ();
      return;
    }

  sl.printf ("replyinfo image_sums %d %d ", start, stop);

  for (int i = start; i <= stop; i++)
    {
      ns->faces_sent[i] |= NS_FACESENT_FACE;

      int qq = get_face_fallback (ns->faceset, i);

      sl << uint16 (i)
         << uint32 (facesets[qq].faces[i].checksum)
         << uint8  (qq)
         << data8  (&new_faces[i].name, new_faces[i].name.length () + 1);
    }

  /* It would make more sense to catch this pre-emptively in the code above.
   * however, if this really happens, we probably just want to cut down the
   * size to less than 1000, since that is what we claim the protocol would
   * support.
   */
  if (sl.length () >= MAXSOCKBUF)
    {
      LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF);
      abort ();
    }

  ns->send_packet (sl);
}

Revision:	1.11
Committed:	Thu Dec 14 20:39:54 2006 UTC (19 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+4 -4 lines
Log Message:	- implement c++ interface to Event->io watchers - cut number of write()'s the server does in half
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2001 Mark Wedel
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	1.4	The author can be reached via e-mail to <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			/** \file
25			* Image related communication
26			*
27			* \date 2003-12-02
28			*
29			* This file deals with the image related communication to the
30			* client. I've located all the functions in this file - this
31			* localizes it more, and means that we don't need to declare
32			* things like all the structures as globals.
33			*/
34
35			#include <global.h>
36			#include <sproto.h>
37
38			#include <newclient.h>
39			#include <newserver.h>
40			#include <loader.h>
41
42			#define MAX_FACE_SETS 20 /*< Maximum number of image sets the program will handle /
43
44			/** Information about one image */
45	root	1.3	typedef struct FaceInfo
46			{
47
48			uint8 data; /< image data /
49
50			uint16 datalen; /*< length of the xpm data /
51
52			uint32 checksum; /*< Checksum of face data /
53	elmex	1.1	} FaceInfo;
54
55			/** Information about one face set */
56	root	1.3	typedef struct
57			{
58
59			char prefix; /< /
60			char *fullname;
61
62			uint8 fallback; /*< faceset to use when an image is not found in this faceset /
63			char *size;
64			char *extension;
65			char *comment;
66
67			FaceInfo faces; /< images in this faceset /
68	elmex	1.1	} FaceSets;
69
70			static FaceSets facesets[MAX_FACE_SETS]; /*< All facesets /
71
72			/**
73			* Checks specified faceset is valid
74			* \param fsn faceset number
75			*/
76	root	1.3	int
77			is_valid_faceset (int fsn)
78	elmex	1.1	{
79	root	1.3	if (fsn >= 0 && fsn < MAX_FACE_SETS && facesets[fsn].prefix)
80			return TRUE;
81			return FALSE;
82	elmex	1.1	}
83
84			/**
85			* Frees all faceset information
86			*/
87	root	1.3	void
88			free_socket_images (void)
89	elmex	1.1	{
90	root	1.3	int num, q;
91	elmex	1.1
92	root	1.3	for (num = 0; num < MAX_FACE_SETS; num++)
93			{
94			if (facesets[num].prefix)
95			{
96			for (q = 0; q < nrofpixmaps; q++)
97			if (facesets[num].faces[q].data)
98			free (facesets[num].faces[q].data);
99			free (facesets[num].prefix);
100			free (facesets[num].fullname);
101			free (facesets[num].size);
102			free (facesets[num].extension);
103			free (facesets[num].comment);
104			free (facesets[num].faces);
105	root	1.2	}
106	elmex	1.1	}
107			}
108
109			/**
110			* This returns the set we will actually use when sending
111			* a face. This is used because the image files may be sparse.
112			* This function is recursive. imageno is the face number we are
113			* trying to send
114			*
115			* If face is not found in specified faceset, tries with 'fallback' faceset.
116			*
117			* \param faceset faceset to check
118			* \param imageno image number
119			*
120			*/
121	root	1.3	static int
122			get_face_fallback (int faceset, int imageno)
123	elmex	1.1	{
124	root	1.3	/* faceset 0 is supposed to have every image, so just return. Doing
125			* so also prevents infinite loops in the case if it not having
126			* the face, but in that case, we are likely to crash when we try
127			* to access the data, but that is probably preferable to an infinite
128			* loop.
129			*/
130			if (faceset == 0)
131			return 0;
132
133			if (!facesets[faceset].prefix)
134			{
135			LOG (llevError, "get_face_fallback called with unused set (%d)?\n", faceset);
136			return 0; /* use default set */
137			}
138			if (facesets[faceset].faces[imageno].data)
139			return faceset;
140			return get_face_fallback (facesets[faceset].fallback, imageno);
141	elmex	1.1	}
142
143			/**
144			* Checks fallback are correctly defined.
145			* This is a simple recursive function that makes sure the fallbacks
146			* are all proper (eg, the fall back to defined sets, and also
147			* eventually fall back to 0). At the top level, togo is set to MAX_FACE_SETS,
148			* if togo gets to zero, it means we have a loop.
149			* This is only run when we first load the facesets.
150			*/
151	root	1.3	static void
152			check_faceset_fallback (int faceset, int togo)
153	elmex	1.1	{
154	root	1.3	int fallback = facesets[faceset].fallback;
155	elmex	1.1
156	root	1.3	/* proper case - falls back to base set */
157			if (fallback == 0)
158			return;
159
160			if (!facesets[fallback].prefix)
161			{
162			LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback);
163			abort ();
164			}
165			togo--;
166			if (togo == 0)
167			{
168			LOG (llevError, "Infinite loop found in facesets. aborting.\n");
169			abort ();
170	elmex	1.1	}
171	root	1.3	check_faceset_fallback (fallback, togo);
172	elmex	1.1	}
173
174			#define MAX_IMAGE_SIZE 10000
175
176			/**
177			* Loads all the image types into memory.
178			*
179			* This way, we can easily send them to the client. We should really do something
180			* better than abort on any errors - on the other hand, these are all fatal
181			* to the server (can't work around them), but the abort just seems a bit
182			* messy (exit would probably be better.)
183			*
184			* Couple of notes: We assume that the faces are in a continous block.
185			* This works fine for now, but this could perhaps change in the future
186			*
187			* Function largely rewritten May 2000 to be more general purpose.
188			* The server itself does not care what the image data is - to the server,
189			* it is just data it needs to allocate. As such, the code is written
190			* to do such.
191			*/
192
193	root	1.3	void
194			read_client_images (void)
195	elmex	1.1	{
196	root	1.3	char filename[400];
197			char buf[HUGE_BUF];
198			char cp, cps[7];
199			FILE *infile;
200			int num, len, compressed, fileno, i, badline;
201
202			memset (facesets, 0, sizeof (facesets));
203			sprintf (filename, "%s/image_info", settings.datadir);
204			if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
205			{
206			LOG (llevError, "Unable to open %s\n", filename);
207			abort ();
208			}
209			while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
210			{
211			badline = 0;
212
213			if (buf[0] == '#')
214			continue;
215			if (!(cps[0] = strtok (buf, ":")))
216			badline = 1;
217			for (i = 1; i < 7; i++)
218			{
219			if (!(cps[i] = strtok (NULL, ":")))
220			badline = 1;
221			}
222			if (badline)
223			{
224			LOG (llevError, "Bad line in image_info file, ignoring line:\n %s", buf);
225	root	1.2	}
226	root	1.3	else
227			{
228			len = atoi (cps[0]);
229			if (len >= MAX_FACE_SETS)
230			{
231			LOG (llevError, "To high a setnum in image_info file: %d > %d\n", len, MAX_FACE_SETS);
232			abort ();
233	root	1.2	}
234	root	1.3	facesets[len].prefix = strdup_local (cps[1]);
235			facesets[len].fullname = strdup_local (cps[2]);
236			facesets[len].fallback = atoi (cps[3]);
237			facesets[len].size = strdup_local (cps[4]);
238			facesets[len].extension = strdup_local (cps[5]);
239			facesets[len].comment = strdup_local (cps[6]);
240	root	1.2	}
241	elmex	1.1	}
242	root	1.3	close_and_delete (infile, compressed);
243			for (i = 0; i < MAX_FACE_SETS; i++)
244			{
245			if (facesets[i].prefix)
246			check_faceset_fallback (i, MAX_FACE_SETS);
247			}
248			/* Loaded the faceset information - now need to load up the
249			* actual faces.
250			*/
251
252			for (fileno = 0; fileno < MAX_FACE_SETS; fileno++)
253			{
254			/* if prefix is not set, this is not used */
255			if (!facesets[fileno].prefix)
256			continue;
257			facesets[fileno].faces = (FaceInfo *) calloc (nrofpixmaps, sizeof (FaceInfo));
258
259			sprintf (filename, "%s/crossfire.%d", settings.datadir, fileno);
260			LOG (llevDebug, "Loading image file %s\n", filename);
261
262			if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
263			{
264			LOG (llevError, "Unable to open %s\n", filename);
265			abort ();
266	root	1.2	}
267	root	1.3	while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
268			{
269			if (strncmp (buf, "IMAGE ", 6) != 0)
270			{
271			LOG (llevError, "read_client_images:Bad image line - not IMAGE, instead\n%s", buf);
272			abort ();
273	root	1.2	}
274	root	1.3	num = atoi (buf + 6);
275			if (num < 0 \|\| num >= nrofpixmaps)
276			{
277			LOG (llevError, "read_client_images: Image num %d not in 0..%d\n%s", num, nrofpixmaps, buf);
278			abort ();
279	root	1.2	}
280	root	1.3	/* Skip accross the number data */
281			for (cp = buf + 6; *cp != ' '; cp++);
282			len = atoi (cp);
283			if (len == 0 \|\| len > MAX_IMAGE_SIZE)
284			{
285			LOG (llevError, "read_client_images: length not valid: %d > %d \n%s", len, MAX_IMAGE_SIZE, buf);
286			abort ();
287	root	1.2	}
288	root	1.5	/* We don't actualy care about the name of the image that
289	root	1.3	* is embedded in the image file, so just ignore it.
290			*/
291			facesets[fileno].faces[num].datalen = len;
292			facesets[fileno].faces[num].data = (uint8 *) malloc (len);
293			if ((i = fread (facesets[fileno].faces[num].data, len, 1, infile)) != 1)
294			{
295			LOG (llevError, "read_client_images: Did not read desired amount of data, wanted %d, got %d\n%s", len, i, buf);
296			abort ();
297	root	1.2	}
298	root	1.3	facesets[fileno].faces[num].checksum = 0;
299			for (i = 0; i < len; i++)
300			{
301			ROTATE_RIGHT (facesets[fileno].faces[num].checksum);
302			facesets[fileno].faces[num].checksum += facesets[fileno].faces[num].data[i];
303			facesets[fileno].faces[num].checksum &= 0xffffffff;
304	root	1.2	}
305			}
306	root	1.3	close_and_delete (infile, compressed);
307			} /* For fileno < MAX_FACE_SETS */
308	elmex	1.1	}
309
310			/**
311			* Client tells us what type of faces it wants. Also sets
312			* the caching attribute.
313			*
314			*/
315
316	root	1.3	void
317	root	1.10	SetFaceMode (char buf, int len, client_socket ns)
318	elmex	1.1	{
319	root	1.3	int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE);
320	elmex	1.1
321	root	1.3	if (mode == CF_FACE_NONE)
322	root	1.7	ns->facecache = 1;
323	root	1.3	else if (mode != CF_FACE_PNG)
324			{
325	root	1.8	packet sl;
326	root	1.7	sl.printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode. Will use Png");
327			ns->send_packet (sl);
328	elmex	1.1	}
329	root	1.7
330	root	1.3	if (mask)
331	root	1.7	ns->facecache = 1;
332	elmex	1.1	}
333
334			/**
335			* Client has requested pixmap that it somehow missed getting.
336			* This will be called often if the client is
337			* caching images.
338			*/
339
340	root	1.3	void
341	root	1.10	SendFaceCmd (char buff, int len, client_socket ns)
342	elmex	1.1	{
343	root	1.3	long tmpnum = atoi (buff);
344			short facenum = tmpnum & 0xffff;
345	elmex	1.1
346	root	1.3	if (facenum != 0)
347			esrv_send_face (ns, facenum, 1);
348	elmex	1.1	}
349
350			/**
351			* Sends a face to a client if they are in pixmap mode
352			* nothing gets sent in bitmap mode.
353			* If nocache is true (nonzero), ignore the cache setting from the client -
354			* this is needed for the askface, in which we really do want to send the
355			* face (and askface is the only place that should be setting it). Otherwise,
356			* we look at the facecache, and if set, send the image name.
357			*/
358
359	root	1.3	void
360	root	1.10	esrv_send_face (client_socket *ns, short face_num, int nocache)
361	elmex	1.1	{
362	root	1.3	char fallback;
363	elmex	1.1
364	root	1.3	if (face_num <= 0 \|\| face_num >= nrofpixmaps)
365			{
366			LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num);
367			return;
368			}
369
370	root	1.8	packet sl;
371	root	1.3	fallback = get_face_fallback (ns->faceset, face_num);
372
373			if (facesets[fallback].faces[face_num].data == NULL)
374			{
375			LOG (llevError, "esrv_send_face: faces[%d].data == NULL\n", face_num);
376			return;
377			}
378
379			if (ns->facecache && !nocache)
380			{
381	root	1.6	sl << (ns->image2 ? "face2 " : "face1 ")
382			<< uint16 (face_num);
383
384	root	1.3	if (ns->image2)
385	root	1.6	sl << uint8 (fallback);
386
387			sl << uint32 (facesets[fallback].faces[face_num].checksum)
388			<< new_faces[face_num].name;
389	root	1.3
390	root	1.11	ns->send_packet (sl);
391	root	1.3	}
392			else
393			{
394	root	1.6	sl << (ns->image2 ? "image2 " : "image ")
395			<< uint32 (face_num);
396
397	root	1.3	if (ns->image2)
398	root	1.6	sl << uint8 (fallback);
399
400			sl << uint32 (facesets[fallback].faces[face_num].datalen)
401			<< data (facesets[fallback].faces[face_num].data, facesets[fallback].faces[face_num].datalen);
402
403	root	1.11	ns->send_packet (sl);
404	elmex	1.1	}
405	root	1.6
406	root	1.3	ns->faces_sent[face_num] \|= NS_FACESENT_FACE;
407	elmex	1.1	}
408
409			/**
410			* Sends the number of images, checksum of the face file,
411			* and the image_info file information. See the doc/Developers/protocol
412			* if you want further detail.
413			*/
414
415	root	1.3	void
416	root	1.10	send_image_info (client_socket * ns, char *params)
417	elmex	1.1	{
418	root	1.8	packet sl;
419	elmex	1.1
420	root	1.6	sl.printf ("replyinfo image_info\n%d\n%d\n", nrofpixmaps - 1, bmaps_checksum);
421
422			for (int i = 0; i < MAX_FACE_SETS; i++)
423			if (facesets[i].prefix)
424			sl.printf ("%d:%s:%s:%d:%s:%s:%s",
425			i, facesets[i].prefix, facesets[i].fullname, facesets[i].fallback,
426			facesets[i].size, facesets[i].extension, facesets[i].comment);
427	elmex	1.1
428	root	1.11	ns->send_packet (sl);
429	elmex	1.1	}
430
431			/**
432			* Sends requested face information.
433			* \param ns socket to send to
434			* \param params contains first and last index of face
435			*
436			* For each image in [start..stop] sends
437			* - checksum
438			* - name
439			*/
440	root	1.3	void
441	root	1.10	send_image_sums (client_socket * ns, char *params)
442	elmex	1.1	{
443	root	1.3	int start, stop;
444			char *cp, buf[MAX_BUF];
445
446	root	1.8	packet sl;
447	root	1.3
448			start = atoi (params);
449			for (cp = params; *cp != '\0'; cp++)
450			if (*cp == ' ')
451			break;
452
453			stop = atoi (cp);
454			if (stop < start \|\| *cp == '\0' \|\| (stop - start) > 1000 \|\| stop >= nrofpixmaps)
455			{
456	root	1.7	sl.printf ("replyinfo image_sums %d %d", start, stop);
457			ns->send_packet (sl);
458			sl.reset ();
459	root	1.3	return;
460			}
461
462	root	1.6	sl.printf ("replyinfo image_sums %d %d ", start, stop);
463	root	1.3
464	root	1.6	for (int i = start; i <= stop; i++)
465	root	1.3	{
466			ns->faces_sent[i] \|= NS_FACESENT_FACE;
467
468	root	1.6	int qq = get_face_fallback (ns->faceset, i);
469
470			sl << uint16 (i)
471			<< uint32 (facesets[qq].faces[i].checksum)
472			<< uint8 (qq)
473			<< data8 (&new_faces[i].name, new_faces[i].name.length () + 1);
474	root	1.3	}
475	root	1.6
476	root	1.3	/* It would make more sense to catch this pre-emptively in the code above.
477			* however, if this really happens, we probably just want to cut down the
478			* size to less than 1000, since that is what we claim the protocol would
479			* support.
480			*/
481	root	1.9	if (sl.length () >= MAXSOCKBUF)
482	root	1.3	{
483	root	1.9	LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF);
484	root	1.3	abort ();
485	elmex	1.1	}
486	root	1.6
487	root	1.11	ns->send_packet (sl);
488	elmex	1.1	}
489	root	1.6