server/include/network.h

/*
 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game.
 * 
 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Crossfire TRT 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 Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * The authors can be reached via e-mail to <crossfire@schmorp.de>
 */

/* This file defines various flags that both the new client and
 * newserver uses.  These should never be changed, only expanded.
 * Changing them will likely cause all old clients to not work properly.
 * While called newclient, it is really used by both the client and
 * server to keep some values the same.
 *
 * Name format is CS_(command)_(flag)
 * CS = Client/Server.
 * (command) is protocol command, ie ITEM
 * (flag) is the flag name
 */

/* It is trivial to keep a link of copy of this file in the client
 * or server area.  But keeping one common file should make things
 * more reliable, as both the client and server will definately be
 * talking about the same values.
 */


#ifndef NETWORK_H
#define NETWORK_H

#include <cstdarg>

/* Maximum size of any packet we expect.
 *
 * The size must be the same in the server and the client (stupid), and its also NOT
 * the maximum buffer size as one would expect, but the maximum buffer size + 1.
 */
#define MAXSOCKBUF 10240

#define CS_QUERY_YESNO  0x1     /* Yes/no question */
#define CS_QUERY_SINGLECHAR 0x2 /* Single character response expected */
#define CS_QUERY_HIDEINPUT 0x4  /* Hide input being entered */

/* These are multiplication values that should be used when changing 
 * floats to ints, and vice version.  MULTI is integer representatin
 * (float to int), MULTF is float, for going from int to float.
 */
#define FLOAT_MULTI     100000
#define FLOAT_MULTF     100000.0

/* ID's for the various stats that get sent across. */

#define CS_STAT_HP       1
#define CS_STAT_MAXHP    2
#define CS_STAT_SP       3
#define CS_STAT_MAXSP    4
#define CS_STAT_STR      5
#define CS_STAT_INT      6
#define CS_STAT_WIS      7
#define CS_STAT_DEX      8
#define CS_STAT_CON      9
#define CS_STAT_CHA     10
#define CS_STAT_EXP     11
#define CS_STAT_LEVEL   12
#define CS_STAT_WC      13
#define CS_STAT_AC      14
#define CS_STAT_DAM     15
#define CS_STAT_ARMOUR  16
#define CS_STAT_SPEED   17
#define CS_STAT_FOOD    18
#define CS_STAT_WEAP_SP 19
#define CS_STAT_RANGE   20
#define CS_STAT_TITLE   21
#define CS_STAT_POW     22
#define CS_STAT_GRACE   23
#define CS_STAT_MAXGRACE        24
#define CS_STAT_FLAGS   25
#define CS_STAT_WEIGHT_LIM      26
#define CS_STAT_EXP64   28
#define CS_STAT_SPELL_ATTUNE    29
#define CS_STAT_SPELL_REPEL     30
#define CS_STAT_SPELL_DENY      31

/* Start & end of resistances, inclusive. */
#define CS_STAT_RESIST_START    100
#define CS_STAT_RESIST_END      117
#define CS_STAT_RES_PHYS        100
#define CS_STAT_RES_MAG         101
#define CS_STAT_RES_FIRE        102
#define CS_STAT_RES_ELEC        103
#define CS_STAT_RES_COLD        104
#define CS_STAT_RES_CONF        105
#define CS_STAT_RES_ACID        106
#define CS_STAT_RES_DRAIN       107
#define CS_STAT_RES_GHOSTHIT    108
#define CS_STAT_RES_POISON      109
#define CS_STAT_RES_SLOW        110
#define CS_STAT_RES_PARA        111
#define CS_STAT_TURN_UNDEAD     112
#define CS_STAT_RES_FEAR        113
#define CS_STAT_RES_DEPLETE     114
#define CS_STAT_RES_DEATH       115
#define CS_STAT_RES_HOLYWORD    116
#define CS_STAT_RES_BLIND       117

/* Start & end of skill experience + skill level, inclusive. */
#define CS_STAT_SKILLEXP_START 118
#define CS_STAT_SKILLEXP_END 129
#define CS_STAT_SKILLEXP_AGILITY 118
#define CS_STAT_SKILLEXP_AGLEVEL 119
#define CS_STAT_SKILLEXP_PERSONAL 120
#define CS_STAT_SKILLEXP_PELEVEL 121
#define CS_STAT_SKILLEXP_MENTAL 122
#define CS_STAT_SKILLEXP_MELEVEL 123
#define CS_STAT_SKILLEXP_PHYSIQUE 124
#define CS_STAT_SKILLEXP_PHLEVEL 125
#define CS_STAT_SKILLEXP_MAGIC 126
#define CS_STAT_SKILLEXP_MALEVEL 127
#define CS_STAT_SKILLEXP_WISDOM 128
#define CS_STAT_SKILLEXP_WILEVEL 129

/* CS_STAT_SKILLINFO is used as the starting index point.  Skill number->name
 * map is generated dynamically for the client, so a bunch of entries will
 * be used here.  CS_NUM_SKILLS does not match how many skills there really
 * are - instead, it is used as a range of values so that the client
 * can have some idea how many skill categories there may be.
 */
#define CS_STAT_SKILLINFO   140
#define CS_NUM_SKILLS        50

/* These are used with CS_STAT_FLAGS above to communicate S->C what the
 * server thinks the fireon & runon states are.
 */
#define SF_FIREON   0x01
#define SF_RUNON    0x02

/* The following are the color flags passed to new_draw_info.
 *
 * We also set up some control flags
 *
 * NDI = New Draw Info
 */

/* Color specifications - note these match the order in xutil.c */
/* Note 2:  Black, the default color, is 0.  Thus, it does not need to
 * be implicitly specified.
 */
#define NDI_BLACK       0
#define NDI_WHITE       1
#define NDI_NAVY        2
#define NDI_RED         3
#define NDI_ORANGE      4
#define NDI_BLUE        5       /* Actually, it is Dodger Blue */
#define NDI_DK_ORANGE   6       /* DarkOrange2 */
#define NDI_GREEN       7       /* SeaGreen */
#define NDI_LT_GREEN    8       /* DarkSeaGreen,  which is actually paler */
                                /* Than seagreen - also background color */
#define NDI_GREY        9
#define NDI_BROWN       10      /* Sienna */
#define NDI_GOLD        11
#define NDI_TAN         12      /* Khaki */

#define NDI_MAX_COLOR   12      /* Last value in */
#define NDI_COLOR_MASK  0xff    /* Gives lots of room for expansion - we are */
                                /* using an int anyways, so we have the space */
                                /* to still do all the flags */


#define NDI_UNIQUE      0x100   /* Print this out immediately, don't buffer */
#define NDI_ALL         0x200   /* Inform all players of this message */

/* Flags for the item command */
enum {a_none, a_readied, a_wielded, a_worn, a_active, a_applied};
#define F_APPLIED       0x000F
#define F_LOCATION      0x00F0
#define F_UNPAID        0x0200
#define F_MAGIC         0x0400
#define F_CURSED        0x0800
#define F_DAMNED        0x1000
#define F_OPEN          0x2000
#define F_NOPICK        0x4000
#define F_LOCKED        0x8000

#define CF_FACE_NONE    0
#define CF_FACE_BITMAP  1
#define CF_FACE_XPM     2
#define CF_FACE_PNG     3
#define CF_FACE_CACHE   0x10

/* Used in the new_face structure on the magicmap field.  Low bits
 * are color informatin.  For now, only high bit information we need
 * is floor information.
 */
#define FACE_FLOOR      0x80
#define FACE_WALL       0x40    /* Or'd into the color value by the server
                                 * right before sending.
                                 */
#define FACE_COLOR_MASK 0xf

#define UPD_LOCATION    0x01
#define UPD_FLAGS       0x02
#define UPD_WEIGHT      0x04
#define UPD_FACE        0x08
#define UPD_NAME        0x10
#define UPD_ANIM        0x20
#define UPD_ANIMSPEED   0x40
#define UPD_NROF        0x80

/* The flag values sent by the updspell command */
#define UPD_SP_MANA     0x01
#define UPD_SP_GRACE    0x02
#define UPD_SP_DAMAGE   0x04

#define SOUND_NORMAL    0
#define SOUND_SPELL     1

struct data
{
  unsigned int len;
  const void *ptr;

  data   (const void *ptr, int len) : len (len), ptr (ptr) { }
  data   (const char *str) : len (strlen (str ? str : 0)), ptr ((void *)str) { }
  data   (const shstr &sh) : len (sh.length ()), ptr ((void *)&sh) { }
};

struct data8
{
  unsigned int len;
  const void *ptr;

  data8  (const void *ptr, int len) : len (len), ptr (ptr) { }
  data8  (const char *str) : len (strlen (str ? str : 0)), ptr ((void *)str) { }
  data8  (const shstr &sh) : len (sh.length ()), ptr ((void *)&sh) { }
};

struct data16
{
  unsigned int len;
  const void *ptr;

  data16 (const void *ptr, int len) : len (len), ptr (ptr) { }
  data16 (const char *str) : len (strlen (str ? str : 0)), ptr ((void *)str) { }
  data16 (const shstr &sh) : len (sh.length ()), ptr ((void *)&sh) { }
};

struct ber32
{
  enum { size = 5 }; // maximum length of an encoded ber32
  uint32 val;

  ber32 (uint32 val) : val (val) { }
};

/* Contains the base information we use to make up a packet we want to send. */
struct packet
{
  enum { bufsize = MAXSOCKBUF };
  enum { hdrlen  = 2 }; // keep this many bytes free at the front

  // strategy: only check on variable-length adds
  // and allow 256 bytes for any headers.
  uint8 *cur;
  uint8 buf_ [hdrlen + bufsize + 256];

  packet ()
  {
    reset ();
  }

  packet (const char *name);

  uint8  operator [](unsigned int i) const { return buf_ [i + hdrlen]; }
  uint8 &operator [](unsigned int i)       { return buf_ [i + hdrlen]; }

        uint8 *buf ()       { return buf_ + hdrlen; }
  const uint8 *buf () const { return buf_ + hdrlen; }

  void reset (int offset = 0) { cur = buf () + offset; }
  int length () const { return cur - buf (); }
  int room () { return bufsize - (cur - buf ()); }

  // unchecked
  packet &operator <<(uint8  v) { *cur++ = v; return *this; }

  packet &operator <<(uint16 v) { return *this << uint8  (v >>  8) << uint8  (v); }
  packet &operator <<(uint32 v) { return *this << uint16 (v >> 16) << uint16 (v); }
  packet &operator <<(uint64 v) { return *this << uint32 (v >> 32) << uint32 (v); }

  packet &operator <<(sint8  v) { return *this << (uint8 )v; }
  packet &operator <<(sint16 v) { return *this << (uint16)v; }
  packet &operator <<(sint32 v) { return *this << (uint32)v; }
  packet &operator <<(sint64 v) { return *this << (uint64)v; }

  // checked
  packet &operator <<(const ber32 v);

  packet &operator <<(const data   &v);
  packet &operator <<(const data8  &v);
  packet &operator <<(const data16 &v);

  packet &operator <<(const char *v);
  packet &operator <<(const shstr &sh) { return *this << data (&sh, sh.length ()); }
  packet &operator <<(const std::string &s) { return *this << data (s.data (), s.size ()); }

  void vprintf (const char *format, va_list ap);

  void printf (const char *format, ...)
  {
    va_list ap;
    va_start (ap, format);
    vprintf (format, ap);
    va_end (ap);
  }
};

inline uint16 net_uint16 (uint8 *data) { return (data [0] << 8) | data [1]; }
inline uint32 net_uint32 (uint8 *data) { return (net_uint16 (data) << 16) | net_uint16 (data + 2); }
inline sint16 net_sint16 (uint8 *data) { return sint16 (net_uint16 (data)); }
inline sint16 net_sint32 (uint8 *data) { return sint32 (net_uint32 (data)); }

#endif

Revision:	1.13
Committed:	Sat Jun 9 22:54:03 2007 UTC (16 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+0 -10 lines
Log Message:	- introduce global NOW variable storing current tick time. - force some packet send at least every 2 seconds, forcing an ack reply. - timeout connections on ack delay exclusively, by default disconnect after 8 seconds (allowing for at least 5.5s of network hiccups). (linux only, should port to bsds). - nuke ericserver stats code. - reduce number of syscalls (less gettimeofday, only get tcp_info about once/second). - get rid of coroapi.time () in favour of now ().
#	User	Rev	Content
1	root	1.1	/*
2	root	1.12	* This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game.
3	pippijn	1.8	*
4	root	1.12	* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
5			* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.8	*
8	root	1.12	* Crossfire TRT is free software; you can redistribute it and/or modify it
9			* under the terms of the GNU General Public License as published by the Free
10			* Software Foundation; either version 2 of the License, or (at your option)
11			* any later version.
12	pippijn	1.8	*
13	root	1.12	* This program is distributed in the hope that it will be useful, but
14			* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15			* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16			* for more details.
17	pippijn	1.8	*
18	root	1.12	* You should have received a copy of the GNU General Public License along
19			* with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51
20			* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21			*
22			* The authors can be reached via e-mail to <crossfire@schmorp.de>
23	pippijn	1.8	*/
24	root	1.1
25			/* This file defines various flags that both the new client and
26			* newserver uses. These should never be changed, only expanded.
27			* Changing them will likely cause all old clients to not work properly.
28			* While called newclient, it is really used by both the client and
29			* server to keep some values the same.
30			*
31			* Name format is CS_(command)_(flag)
32			* CS = Client/Server.
33			* (command) is protocol command, ie ITEM
34			* (flag) is the flag name
35			*/
36
37			/* It is trivial to keep a link of copy of this file in the client
38			* or server area. But keeping one common file should make things
39			* more reliable, as both the client and server will definately be
40			* talking about the same values.
41			*/
42
43
44	root	1.4	#ifndef NETWORK_H
45			#define NETWORK_H
46
47			#include <cstdarg>
48	root	1.1
49	root	1.6	/* Maximum size of any packet we expect.
50	root	1.1	*
51			* The size must be the same in the server and the client (stupid), and its also NOT
52			* the maximum buffer size as one would expect, but the maximum buffer size + 1.
53			*/
54			#define MAXSOCKBUF 10240
55
56			#define CS_QUERY_YESNO 0x1 /* Yes/no question */
57			#define CS_QUERY_SINGLECHAR 0x2 /* Single character response expected */
58			#define CS_QUERY_HIDEINPUT 0x4 /* Hide input being entered */
59
60			/* These are multiplication values that should be used when changing
61			* floats to ints, and vice version. MULTI is integer representatin
62			* (float to int), MULTF is float, for going from int to float.
63			*/
64			#define FLOAT_MULTI 100000
65			#define FLOAT_MULTF 100000.0
66
67			/* ID's for the various stats that get sent across. */
68
69			#define CS_STAT_HP 1
70			#define CS_STAT_MAXHP 2
71			#define CS_STAT_SP 3
72			#define CS_STAT_MAXSP 4
73			#define CS_STAT_STR 5
74			#define CS_STAT_INT 6
75			#define CS_STAT_WIS 7
76			#define CS_STAT_DEX 8
77			#define CS_STAT_CON 9
78			#define CS_STAT_CHA 10
79			#define CS_STAT_EXP 11
80			#define CS_STAT_LEVEL 12
81			#define CS_STAT_WC 13
82			#define CS_STAT_AC 14
83			#define CS_STAT_DAM 15
84			#define CS_STAT_ARMOUR 16
85			#define CS_STAT_SPEED 17
86			#define CS_STAT_FOOD 18
87			#define CS_STAT_WEAP_SP 19
88			#define CS_STAT_RANGE 20
89			#define CS_STAT_TITLE 21
90			#define CS_STAT_POW 22
91			#define CS_STAT_GRACE 23
92			#define CS_STAT_MAXGRACE 24
93			#define CS_STAT_FLAGS 25
94			#define CS_STAT_WEIGHT_LIM 26
95			#define CS_STAT_EXP64 28
96			#define CS_STAT_SPELL_ATTUNE 29
97			#define CS_STAT_SPELL_REPEL 30
98			#define CS_STAT_SPELL_DENY 31
99
100			/* Start & end of resistances, inclusive. */
101			#define CS_STAT_RESIST_START 100
102			#define CS_STAT_RESIST_END 117
103			#define CS_STAT_RES_PHYS 100
104			#define CS_STAT_RES_MAG 101
105			#define CS_STAT_RES_FIRE 102
106			#define CS_STAT_RES_ELEC 103
107			#define CS_STAT_RES_COLD 104
108			#define CS_STAT_RES_CONF 105
109			#define CS_STAT_RES_ACID 106
110			#define CS_STAT_RES_DRAIN 107
111			#define CS_STAT_RES_GHOSTHIT 108
112			#define CS_STAT_RES_POISON 109
113			#define CS_STAT_RES_SLOW 110
114			#define CS_STAT_RES_PARA 111
115			#define CS_STAT_TURN_UNDEAD 112
116			#define CS_STAT_RES_FEAR 113
117			#define CS_STAT_RES_DEPLETE 114
118			#define CS_STAT_RES_DEATH 115
119			#define CS_STAT_RES_HOLYWORD 116
120			#define CS_STAT_RES_BLIND 117
121
122			/* Start & end of skill experience + skill level, inclusive. */
123			#define CS_STAT_SKILLEXP_START 118
124			#define CS_STAT_SKILLEXP_END 129
125			#define CS_STAT_SKILLEXP_AGILITY 118
126			#define CS_STAT_SKILLEXP_AGLEVEL 119
127			#define CS_STAT_SKILLEXP_PERSONAL 120
128			#define CS_STAT_SKILLEXP_PELEVEL 121
129			#define CS_STAT_SKILLEXP_MENTAL 122
130			#define CS_STAT_SKILLEXP_MELEVEL 123
131			#define CS_STAT_SKILLEXP_PHYSIQUE 124
132			#define CS_STAT_SKILLEXP_PHLEVEL 125
133			#define CS_STAT_SKILLEXP_MAGIC 126
134			#define CS_STAT_SKILLEXP_MALEVEL 127
135			#define CS_STAT_SKILLEXP_WISDOM 128
136			#define CS_STAT_SKILLEXP_WILEVEL 129
137
138			/* CS_STAT_SKILLINFO is used as the starting index point. Skill number->name
139			* map is generated dynamically for the client, so a bunch of entries will
140			* be used here. CS_NUM_SKILLS does not match how many skills there really
141			* are - instead, it is used as a range of values so that the client
142			* can have some idea how many skill categories there may be.
143			*/
144			#define CS_STAT_SKILLINFO 140
145			#define CS_NUM_SKILLS 50
146
147			/* These are used with CS_STAT_FLAGS above to communicate S->C what the
148			* server thinks the fireon & runon states are.
149			*/
150			#define SF_FIREON 0x01
151			#define SF_RUNON 0x02
152
153			/* The following are the color flags passed to new_draw_info.
154			*
155			* We also set up some control flags
156			*
157			* NDI = New Draw Info
158			*/
159
160			/* Color specifications - note these match the order in xutil.c */
161			/* Note 2: Black, the default color, is 0. Thus, it does not need to
162			* be implicitly specified.
163			*/
164			#define NDI_BLACK 0
165			#define NDI_WHITE 1
166			#define NDI_NAVY 2
167			#define NDI_RED 3
168			#define NDI_ORANGE 4
169			#define NDI_BLUE 5 /* Actually, it is Dodger Blue */
170			#define NDI_DK_ORANGE 6 /* DarkOrange2 */
171			#define NDI_GREEN 7 /* SeaGreen */
172			#define NDI_LT_GREEN 8 /* DarkSeaGreen, which is actually paler */
173			/* Than seagreen - also background color */
174			#define NDI_GREY 9
175			#define NDI_BROWN 10 /* Sienna */
176			#define NDI_GOLD 11
177			#define NDI_TAN 12 /* Khaki */
178
179			#define NDI_MAX_COLOR 12 /* Last value in */
180			#define NDI_COLOR_MASK 0xff /* Gives lots of room for expansion - we are */
181			/* using an int anyways, so we have the space */
182			/* to still do all the flags */
183
184
185			#define NDI_UNIQUE 0x100 /* Print this out immediately, don't buffer */
186			#define NDI_ALL 0x200 /* Inform all players of this message */
187
188			/* Flags for the item command */
189			enum {a_none, a_readied, a_wielded, a_worn, a_active, a_applied};
190			#define F_APPLIED 0x000F
191			#define F_LOCATION 0x00F0
192			#define F_UNPAID 0x0200
193			#define F_MAGIC 0x0400
194			#define F_CURSED 0x0800
195			#define F_DAMNED 0x1000
196			#define F_OPEN 0x2000
197			#define F_NOPICK 0x4000
198			#define F_LOCKED 0x8000
199
200			#define CF_FACE_NONE 0
201			#define CF_FACE_BITMAP 1
202			#define CF_FACE_XPM 2
203			#define CF_FACE_PNG 3
204			#define CF_FACE_CACHE 0x10
205
206			/* Used in the new_face structure on the magicmap field. Low bits
207			* are color informatin. For now, only high bit information we need
208			* is floor information.
209			*/
210			#define FACE_FLOOR 0x80
211			#define FACE_WALL 0x40 /* Or'd into the color value by the server
212			* right before sending.
213			*/
214			#define FACE_COLOR_MASK 0xf
215
216			#define UPD_LOCATION 0x01
217			#define UPD_FLAGS 0x02
218			#define UPD_WEIGHT 0x04
219			#define UPD_FACE 0x08
220			#define UPD_NAME 0x10
221			#define UPD_ANIM 0x20
222			#define UPD_ANIMSPEED 0x40
223			#define UPD_NROF 0x80
224
225			/* The flag values sent by the updspell command */
226			#define UPD_SP_MANA 0x01
227			#define UPD_SP_GRACE 0x02
228			#define UPD_SP_DAMAGE 0x04
229
230			#define SOUND_NORMAL 0
231			#define SOUND_SPELL 1
232
233			struct data
234			{
235			unsigned int len;
236			const void *ptr;
237
238			data (const void *ptr, int len) : len (len), ptr (ptr) { }
239			data (const char str) : len (strlen (str ? str : 0)), ptr ((void )str) { }
240			data (const shstr &sh) : len (sh.length ()), ptr ((void *)&sh) { }
241			};
242
243			struct data8
244			{
245			unsigned int len;
246			const void *ptr;
247
248			data8 (const void *ptr, int len) : len (len), ptr (ptr) { }
249			data8 (const char str) : len (strlen (str ? str : 0)), ptr ((void )str) { }
250			data8 (const shstr &sh) : len (sh.length ()), ptr ((void *)&sh) { }
251			};
252
253			struct data16
254			{
255			unsigned int len;
256			const void *ptr;
257
258			data16 (const void *ptr, int len) : len (len), ptr (ptr) { }
259			data16 (const char str) : len (strlen (str ? str : 0)), ptr ((void )str) { }
260			data16 (const shstr &sh) : len (sh.length ()), ptr ((void *)&sh) { }
261			};
262
263	root	1.9	struct ber32
264			{
265	root	1.10	enum { size = 5 }; // maximum length of an encoded ber32
266	root	1.9	uint32 val;
267
268			ber32 (uint32 val) : val (val) { }
269			};
270
271	root	1.1	/* Contains the base information we use to make up a packet we want to send. */
272			struct packet
273			{
274			enum { bufsize = MAXSOCKBUF };
275			enum { hdrlen = 2 }; // keep this many bytes free at the front
276
277			// strategy: only check on variable-length adds
278			// and allow 256 bytes for any headers.
279			uint8 *cur;
280			uint8 buf_ [hdrlen + bufsize + 256];
281
282	root	1.5	packet ()
283			{
284			reset ();
285			}
286
287			packet (const char *name);
288	root	1.1
289			uint8 operator [](unsigned int i) const { return buf_ [i + hdrlen]; }
290			uint8 &operator [](unsigned int i) { return buf_ [i + hdrlen]; }
291
292			uint8 *buf () { return buf_ + hdrlen; }
293			const uint8 *buf () const { return buf_ + hdrlen; }
294
295			void reset (int offset = 0) { cur = buf () + offset; }
296			int length () const { return cur - buf (); }
297			int room () { return bufsize - (cur - buf ()); }
298
299			// unchecked
300			packet &operator <<(uint8 v) { cur++ = v; return this; }
301
302			packet &operator <<(uint16 v) { return *this << uint8 (v >> 8) << uint8 (v); }
303			packet &operator <<(uint32 v) { return *this << uint16 (v >> 16) << uint16 (v); }
304			packet &operator <<(uint64 v) { return *this << uint32 (v >> 32) << uint32 (v); }
305
306			packet &operator <<(sint8 v) { return *this << (uint8 )v; }
307			packet &operator <<(sint16 v) { return *this << (uint16)v; }
308			packet &operator <<(sint32 v) { return *this << (uint32)v; }
309			packet &operator <<(sint64 v) { return *this << (uint64)v; }
310
311			// checked
312	root	1.9	packet &operator <<(const ber32 v);
313
314	root	1.1	packet &operator <<(const data &v);
315			packet &operator <<(const data8 &v);
316			packet &operator <<(const data16 &v);
317
318			packet &operator <<(const char *v);
319			packet &operator <<(const shstr &sh) { return *this << data (&sh, sh.length ()); }
320	root	1.11	packet &operator <<(const std::string &s) { return *this << data (s.data (), s.size ()); }
321	root	1.1
322	root	1.4	void vprintf (const char *format, va_list ap);
323
324			void printf (const char *format, ...)
325			{
326			va_list ap;
327			va_start (ap, format);
328			vprintf (format, ap);
329			va_end (ap);
330			}
331	root	1.1	};
332
333			inline uint16 net_uint16 (uint8 *data) { return (data [0] << 8) \| data [1]; }
334			inline uint32 net_uint32 (uint8 *data) { return (net_uint16 (data) << 16) \| net_uint16 (data + 2); }
335			inline sint16 net_sint16 (uint8 *data) { return sint16 (net_uint16 (data)); }
336			inline sint16 net_sint32 (uint8 *data) { return sint32 (net_uint32 (data)); }
337
338			#endif
339