1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
|
/* - Internet Relay Chat, include/client.h
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* 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 1, 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.
*
*
*
*/
#ifndef INCLUDED_client_h
#define INCLUDED_client_h
#ifndef INCLUDED_config_h
#include "config.h"
#endif
#ifndef INCLUDED_sys_types_h
#include <sys/types.h> /* time_t */
#define INCLUDED_sys_types_h
#endif
#ifndef INCLUDED_netinet_in_h
#include <netinet/in.h> /* in_addr */
#define INCLUDED_netinet_in_h
#endif
#if defined(HAVE_STDDEF_H)
# ifndef INCLUDED_stddef_h
# include <stddef.h> /* offsetof */
# define INCLUDED_stddef_h
# endif
#endif
#ifndef INCLUDED_ircd_defs_h
# include "ircd_defs.h"
#endif
#ifndef INCLUDED_dbuf_h
#include "dbuf.h"
#endif
#include "umodes.h"
#include <sys/time.h>
#define HOSTIPLEN 16 /* Length of dotted quad form of IP */
/* - Dianora */
#define PASSWDLEN 60
#define IDLEN 12 /* this is the maximum length, not the actual
generated length; DO NOT CHANGE! */
#define CLIENT_BUFSIZE 512 /* must be at least 512 bytes */
/*
* pre declare structs
*/
struct SLink;
struct ConfItem;
struct Whowas;
struct fludbot;
struct Zdata;
struct DNSReply;
struct Listener;
struct Client;
/*
* Client structures
* Warning: fields are not automatically initialised to 0
*/
struct User
{
struct SLink* channel; /* chain of channel pointer blocks */
/* struct SLink* logging; *//* chain of channels this is logging in */
struct SLink* invited; /* chain of invite pointer blocks */
struct SLink* silence; /* chain of silence pointer blocks */
char* away; /* pointer to away message */
time_t last; /* last received message */
time_t last_sent; /* last globally-sent message (should reset idle time) */
int refcnt; /* Number of times this block is referenced */
int joined; /* number of channels joined */
/* int logcount; *//* Number of channels this is logging in */
const char* server; /* pointer to scached server name */
/*
* In a perfect world the 'server' name
* should not be needed, a pointer to the
* client describing the server is enough.
* Unfortunately, in reality, server may
* not yet be in links while USER is
* introduced... --msa
*/
/* with auto-removal of dependent links, this may no longer be the
* case, but it's already fixed by the scache anyway -orabidoo
*/
};
struct Server
{
struct User* user; /* who activated this connection */
const char* up; /* Pointer to scache name */
char by[NICKLEN + 1];
struct ConfItem* nline; /* N-line pointer for this server */
struct Client* servers; /* Servers on this server */
struct Client* users; /* Users on this server */
int tsversion; /* ts version sent in SVINFO */
u_int32_t umode_count[MAX_UMODE_COUNT];
};
struct Client
{
struct Client* next;
struct Client* prev;
struct Client* hnext;
/* QS */
struct Client* lnext; /* Used for Server->servers/users */
struct Client* lprev; /* Used for Server->servers/users */
/* LINKLIST */
/* N.B. next_local_client, and previous_local_client
* duplicate the link list referenced to by struct Server -> users
* someday, we'll rationalize this... -Dianora
*/
struct Client* next_local_client; /* keep track of these */
struct Client* previous_local_client;
struct Client* next_server_client;
/* struct Client* next_oper_client; */
struct User* user; /* ...defined, if this is a User */
struct Server* serv; /* ...defined, if this is a server */
struct Client* servptr; /* Points to server this Client is on */
struct Client* from; /* == self, if Local Client, *NEVER* NULL! */
struct Whowas* whowas; /* Pointers to whowas structs */
time_t lasttime; /* ...should be only LOCAL clients? --msa */
time_t firsttime; /* time client was created */
time_t since; /* last time we parsed something */
time_t tsinfo; /* TS on the nick, SVINFO on server */
user_modes umodes; /* opers, normal users subset. DO NOT change this number without editing the bitfield macros below */
user_modes allowed_umodes;/* umodes which may be set outside of USER_UMODES */
u_int32_t flags; /* client flags */
u_int32_t flags2; /* ugh. overflow */
int fd; /* >= 0, for local clients */
int hopcount; /* number of servers to this 0 = local */
unsigned short status; /* Client type */
char nicksent;
unsigned char local_flag; /* if this is 1 this client is local */
short listprogress; /* where were we when the /list blocked? */
int listprogress2; /* where in the current bucket were we? */
/*
* client->name is the unique name for a client nick or host
*/
char name[HOSTLEN + 1];
/* origname is the name a client signed on with */
char origname[HOSTLEN + 1];
/*
* client->username is the username from ident or the USER message,
* If the client is idented the USER message is ignored, otherwise
* the username part of the USER message is put here prefixed with a
* tilde depending on the I:line, Once a client has registered, this
* field should be considered read-only.
*/
char username[USERLEN + 1]; /* client's username */
/*
* client->host contains the resolved name or ip address
* as a string for the user, it may be fiddled with for oper spoofing etc.
* once it's changed the *real* address goes away. This should be
* considered a read-only field after the client has registered.
*/
char host[HOSTLEN + 1]; /* client's hostname */
/*
* client->info for unix clients will normally contain the info from the
* gcos field in /etc/passwd but anything can go here.
*/
char info[REALLEN + 1]; /* Free form additional client info */
#ifdef FLUD
struct SLink* fludees;
#endif
struct timeval ping_send_time; /* When I last sent a ping */
struct timeval ping_time; /* ping RTT */
#ifdef FLUD
time_t fludblock;
struct fludbot* fluders;
char lastmsg[32];
int repeatcount, lastlen;
#endif
/* I have these everywhere now */
struct in_addr ip; /* keep real ip# too */
char dnshost[HOSTLEN + 1]; /* Resolved hostname (or sockhost) */
char spoofhost[HOSTLEN + 1]; /* Hostname to spoof to, when user is spoofed */
/*
* client->sockhost contains the ip address gotten from the socket as a
* string, this field should be considered read-only once the connection
* has been made. (set in s_bsd.c only) (now also set in s_user.c for remote connections)
*/
char sockhost[HOSTIPLEN + 1]; /* This is the host name from the
socket ip address as string */
/* struct ConfItem *iline; *//* The currently attached I:line */
/**************************************************************
**************************************************************
**************************************************************
* The following fields are allocated only for local clients
* (directly connected to *this* server with a socket.
* The first of them *MUST* be the "count"--it is the field
* to which the allocation is tied to! *Never* refer to
* these fields, if (from != self).
*/
int count; /* Amount of data in buffer */
#ifdef BOTCHECK
unsigned char isbot; /* non 0 if its a type of bot */
#endif
#ifdef ANTI_SPAMBOT
time_t last_join_time; /* when this client last
joined a channel */
time_t last_leave_time; /* when this client last
* left a channel */
int join_leave_count; /* count of JOIN/LEAVE in less than
MIN_JOIN_LEAVE_TIME seconds */
int oper_warn_count_down; /* warn opers of this possible
spambot every time this gets to 0 */
#endif
#ifdef ANTI_DRONE_FLOOD
time_t first_received_message_time;
int received_number_of_privmsgs;
int drone_noticed;
#endif
char buffer[CLIENT_BUFSIZE]; /* Incoming message buffer */
#ifdef ZIP_LINKS
struct Zdata* zip; /* zip data */
#endif
short lastsq; /* # of 2k blocks when sendqueued called last*/
struct DBuf sendQ; /* Outgoing message queue--if socket full */
struct DBuf recvQ; /* Hold for data incoming yet to be parsed */
/*
* we want to use unsigned int here so the sizes have a better chance of
* staying the same on 64 bit machines. The current trend is to use
* I32LP64, (32 bit ints, 64 bit longs and pointers) and since ircd
* will NEVER run on an operating system where ints are less than 32 bits,
* it's a relatively safe bet to use ints. Since right shift operations are
* performed on these, it's not safe to allow them to become negative,
* which is possible for long running server connections. Unsigned values
* generally overflow gracefully. --Bleep
*/
unsigned int sendM; /* Statistics: protocol messages send */
unsigned int sendK; /* Statistics: total k-bytes send */
unsigned int receiveM; /* Statistics: protocol messages received */
unsigned int receiveK; /* Statistics: total k-bytes received */
unsigned short sendB; /* counters to count upto 1-k lots of bytes */
unsigned short receiveB; /* sent and received. */
unsigned int lastrecvM; /* to check for activity --Mika */
int priority;
struct Listener* listener; /* listener accepted from */
struct SLink* confs; /* Configuration record associated */
unsigned short port; /* and the remote port# too :-) */
struct DNSReply* dns_reply; /* result returned from resolver query */
#ifdef ANTI_NICK_FLOOD
time_t last_nick_change;
int number_of_nick_changes;
#endif
time_t last_knock; /* don't allow knock to flood */
/*
* XXX - there is no reason to save this, it should be checked when it's
* received and not stored, this is not used after registration
*
* Now heavily (ab)used during challenge/response
* -- asuffield
*/
char passwd[PASSWDLEN + 1];
char response[32 + 1]; /* Size of a response field, used to buffer the response */
int caps; /* capabilities bit-field */
};
/*
* status macros.
*/
#define STAT_CONNECTING 0x01 /* -4 */
#define STAT_HANDSHAKE 0x02 /* -3 */
#define STAT_ME 0x04 /* -2 */
#define STAT_UNKNOWN 0x08 /* -1 */
#define STAT_SERVER 0x10 /* 0 */
#define STAT_CLIENT 0x20 /* 1 */
#define IsRegisteredUser(x) ((x)->status == STAT_CLIENT)
#define IsRegistered(x) ((x)->status > STAT_UNKNOWN)
#define IsConnecting(x) ((x)->status == STAT_CONNECTING)
#define IsHandshake(x) ((x)->status == STAT_HANDSHAKE)
#define IsMe(x) ((x)->status == STAT_ME)
#define IsUnknown(x) ((x)->status == STAT_UNKNOWN)
#define IsServer(x) ((x)->status == STAT_SERVER)
#define IsClient(x) ((x)->status == STAT_CLIENT)
#define SetConnecting(x) ((x)->status = STAT_CONNECTING)
#define SetHandshake(x) ((x)->status = STAT_HANDSHAKE)
#define SetMe(x) ((x)->status = STAT_ME)
#define SetUnknown(x) ((x)->status = STAT_UNKNOWN)
#define SetServer(x) ((x)->status = STAT_SERVER)
#define SetClient(x) ((x)->status = STAT_CLIENT)
#define STAT_CLIENT_PARSE (STAT_UNKNOWN | STAT_CLIENT)
#define STAT_SERVER_PARSE (STAT_CONNECTING | STAT_HANDSHAKE | STAT_SERVER)
#define PARSE_AS_CLIENT(x) ((x)->status & STAT_CLIENT_PARSE)
#define PARSE_AS_SERVER(x) ((x)->status & STAT_SERVER_PARSE)
/*
* ts stuff
*/
#define TS_CURRENT 4 /* current TS protocol version */
#define TS_MIN 4 /* minimum supported TS protocol version */
#define TS_DOESTS 0x20000000
#define DoesTS(x) ((x)->tsinfo == TS_DOESTS)
/* housekeeping flags */
#define FLAGS_PINGSENT 0x0001 /* Unreplied ping sent */
#define FLAGS_DEADSOCKET 0x0002 /* Local socket is dead--Exiting soon */
#define FLAGS_KILLED 0x0004 /* Prevents "QUIT" from being sent for this*/
#define FLAGS_BLOCKED 0x0008 /* socket is in a blocked condition */
#define FLAGS_REJECT_HOLD 0x0010 /* client has been klined */
#define FLAGS_CLOSING 0x0020 /* set when closing to suppress errors */
#define FLAGS_CHKACCESS 0x0040 /* ok to check clients access if set */
#define FLAGS_GOTID 0x0080 /* successful ident lookup achieved */
#define FLAGS_NEEDID 0x0100 /* I-lines say must use ident return */
#define FLAGS_NONL 0x0200 /* No \n in buffer */
#define FLAGS_NORMALEX 0x0400 /* Client exited normally */
#define FLAGS_SENDQEX 0x0800 /* Sendq exceeded */
#define FLAGS_IPHASH 0x1000 /* iphashed this client */
#ifdef CHALLENGERESPONSE
#define FLAGS_CHALLENGED 0x2000 /* sent a CHALL, accept RESP from this one */
#define FLAGS_RESPONDED 0x4000 /* sent a RESP */
#endif
/* *sigh* overflow flags */
#define FLAGS2_RESTRICTED 0x0001 /* restricted client */
#define FLAGS2_PING_TIMEOUT 0x0002
#define FLAGS2_E_LINED 0x0004 /* client is graced with E line */
#define FLAGS2_B_LINED 0x0008 /* client is graced with B line */
#define FLAGS2_HONEYPOT 0x0020 /* client is trapped in the honeypot */
#define FLAGS2_F_LINED 0x0010 /* client is graced with F line */
/* ZIP_LINKS */
#define FLAGS2_ZIP 0x4000 /* (server) link is zipped */
#define FLAGS2_ZIPFIRST 0x8000 /* start of zip (ignore any CR/LF) */
#define FLAGS2_CBURST 0x10000 /* connection burst being sent */
#define FLAGS2_DOINGLIST 0x20000 /* client is doing a list */
#define FLAGS2_ALREADY_EXITED 0x80000 /* kludge grrrr */
#define FLAGS2_IP_HIDDEN 0x200000 /* client IP should be hidden
from non opers */
#define FLAGS2_SENDQ_POP 0x400000 /* sendq exceeded (during list) */
#define FLAGS_ID (FLAGS_NEEDID | FLAGS_GOTID)
/*
* flags macros.
*/
#define IsPerson(x) (IsClient(x) && (x)->user)
#define DoAccess(x) ((x)->flags & FLAGS_CHKACCESS)
#define IsDead(x) ((x)->flags & FLAGS_DEADSOCKET)
#define SetAccess(x) ((x)->flags |= FLAGS_CHKACCESS)
#define NoNewLine(x) ((x)->flags & FLAGS_NONL)
#define ClearAccess(x) ((x)->flags &= ~FLAGS_CHKACCESS)
#define MyConnect(x) ((x)->local_flag != 0)
#define MyClient(x) (MyConnect(x) && IsClient(x))
#ifdef CHALLENGERESPONSE
#define Challenged(x) ((x)->flags & FLAGS_CHALLENGED)
#define SetChallenged(x) ((x)->flags |= FLAGS_CHALLENGED)
#define Responded(x) ((x)->flags & FLAGS_RESPONDED)
#define SetResponded(x) ((x)->flags |= FLAGS_RESPONDED)
#endif
#ifdef REJECT_HOLD
#define IsRejectHeld(x) ((x)->flags & FLAGS_REJECT_HOLD)
#define SetRejectHold(x) ((x)->flags |= FLAGS_REJECT_HOLD)
#endif
#define SetIpHash(x) ((x)->flags |= FLAGS_IPHASH)
#define ClearIpHash(x) ((x)->flags &= ~FLAGS_IPHASH)
#define IsIpHash(x) ((x)->flags & FLAGS_IPHASH)
#define SetNeedId(x) ((x)->flags |= FLAGS_NEEDID)
#define IsNeedId(x) (((x)->flags & FLAGS_NEEDID) != 0)
#define SetGotId(x) ((x)->flags |= FLAGS_GOTID)
#define IsGotId(x) (((x)->flags & FLAGS_GOTID) != 0)
/*
* flags2 macros.
*/
#define IsRestricted(x) ((x)->flags2 & FLAGS2_RESTRICTED)
#define SetRestricted(x) ((x)->flags2 |= FLAGS2_RESTRICTED)
#define ClearDoingList(x) ((x)->flags2 &= ~FLAGS2_DOINGLIST)
#define SetDoingList(x) ((x)->flags2 |= FLAGS2_DOINGLIST)
#define IsDoingList(x) ((x)->flags2 & FLAGS2_DOINGLIST)
#define ClearSendqPop(x) ((x)->flags2 &= ~FLAGS2_SENDQ_POP)
#define SetSendqPop(x) ((x)->flags2 |= FLAGS2_SENDQ_POP)
#define IsSendqPopped(x) ((x)->flags2 & FLAGS2_SENDQ_POP)
#define IsElined(x) ((x)->flags2 & FLAGS2_E_LINED)
#define SetElined(x) ((x)->flags2 |= FLAGS2_E_LINED)
#define IsBlined(x) ((x)->flags2 & FLAGS2_B_LINED)
#define SetBlined(x) ((x)->flags2 |= FLAGS2_B_LINED)
#define IsHoneypot(x) ((x)->flags2 & FLAGS2_HONEYPOT)
#define SetHoneypot(x) ((x)->flags2 |= FLAGS2_HONEYPOT)
#define IsFlined(x) ((x)->flags2 & FLAGS2_F_LINED)
#define SetFlined(x) ((x)->flags2 |= FLAGS2_F_LINED)
#define SetIPHidden(x) ((x)->flags2 |= FLAGS2_IP_HIDDEN)
#define IsIPHidden(x) ((x)->flags2 & FLAGS2_IP_HIDDEN)
#define CBurst(x) ((x)->flags2 & FLAGS2_CBURST)
/*
* definitions for get_client_name
*/
#define HIDE_IP 0
#define SHOW_IP 1
#define MASK_IP 2
extern time_t check_pings(time_t current);
extern const char* get_client_name(struct Client* client, int show_ip);
extern const char* get_client_host(struct Client* client);
extern void release_client_dns_reply(struct Client* client);
extern void init_client_heap(void);
extern void clean_client_heap(void);
extern struct Client* make_client(struct Client* from);
extern void _free_client(struct Client* client);
extern void add_client_to_list(struct Client* client);
extern void remove_client_from_list(struct Client *);
extern void add_client_to_llist(struct Client** list,
struct Client* client);
extern void del_client_from_llist(struct Client** list,
struct Client* client);
extern int exit_client(struct Client*, struct Client*,
struct Client*, const char* comment);
extern void count_local_client_memory(size_t *, size_t *, size_t *);
extern void count_remote_client_memory(size_t *, size_t *, size_t *);
extern int check_registered (struct Client *);
extern int check_registered_user (struct Client *);
extern struct Client* find_chasing (struct Client *, const char *, int *);
extern struct Client* find_client(const char* name, struct Client* client);
extern struct Client* find_server_by_name(const char* name);
extern struct Client* find_person (const char *, struct Client *);
extern struct Client* find_server(const char* name);
extern struct Client* find_userhost (char *, const char *, struct Client *, int *);
extern struct Client* next_client(struct Client* next, const char* name);
extern struct Client* next_client_double(struct Client* next,
const char* name);
extern int client_dumper(char *, struct Client *);
extern int user_dumper(char *, struct User *);
extern int server_dumper(char *, struct Server *);
extern int dump_global_clients(char *, const char *, const char *, int);
/*
* Time we allow clients to spend in unknown state, before tossing.
*/
#define UNKNOWN_TIME 20
#endif /* INCLUDED_client_h */
|
