summaryrefslogtreecommitdiff
path: root/src/userprocess.cpp
blob: b5a5b6683105b5578e46b13ffa47ef8b9ed39955 (plain)
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
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
 *                       E-mail:
 *                <brain@chatspike.net>
 *                <Craig@chatspike.net>
 *
 * Written by Craig Edwards, Craig McLure, and others.
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

/* Now with added unF! ;) */

using namespace std;

#include "inspircd_config.h"
#include "inspircd.h"
#include "inspircd_io.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/utsname.h>
#include <time.h>
#include <string>
#ifdef GCC3
#include <ext/hash_map>
#else
#include <hash_map>
#endif
#include <map>
#include <sstream>
#include <vector>
#include <deque>
#include <sched.h>
#ifdef THREADED_DNS
#include <pthread.h>
#endif
#include "users.h"
#include "ctables.h"
#include "globals.h"
#include "modules.h"
#include "dynamic.h"
#include "wildcard.h"
#include "message.h"
#include "mode.h"
#include "commands.h"
#include "xline.h"
#include "inspstring.h"
#include "dnsqueue.h"
#include "helperfuncs.h"
#include "hashcomp.h"
#include "socketengine.h"
#include "typedefs.h"

extern int MODCOUNT;
extern struct sockaddr_in client,server;
extern socklen_t length;
extern std::vector<Module*> modules;
extern std::vector<ircd_module*> factory;
extern std::vector<InspSocket*> module_sockets;
extern time_t TIME;
extern time_t OLDTIME;
extern std::vector<userrec*> local_users;

extern InspIRCd* ServerInstance;
extern SocketEngine* SE;
extern serverstats* stats;
extern ServerConfig *Config;

extern userrec* fd_ref_table[65536];
char data[65536];

extern user_hash clientlist;
extern chan_hash chanlist;

void ProcessUser(userrec* cu)
{
        int result = EAGAIN;
        log(DEBUG,"Processing user with fd %d",cu->fd);
        int MOD_RESULT = 0;
        int result2 = 0;
        FOREACH_RESULT(OnRawSocketRead(cu->fd,data,65535,result2));
        if (!MOD_RESULT)
        {
                result = cu->ReadData(data, 65535);
        }
        else
        {
                log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
                result = result2;
        }
        log(DEBUG,"Read result: %d",result);
        if (result)
        {
                stats->statsRecv += result;
                // perform a check on the raw buffer as an array (not a string!) to remove
                // characters 0 and 7 which are illegal in the RFC - replace them with spaces.
                // hopefully this should stop even more people whining about "Unknown command: *"
                for (int checker = 0; checker < result; checker++)
                {
                        if ((data[checker] == 0) || (data[checker] == 7))
                                data[checker] = ' ';
                }
                if (result > 0)
                        data[result] = '\0';
                userrec* current = cu;
                int currfd = current->fd;
                int floodlines = 0;
                // add the data to the users buffer
                if (result > 0)
                {
                        if (!current->AddBuffer(data))
                        {
                                // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
                                if (current->registered == 7)
                                {
                                        kill_link(current,"RecvQ exceeded");
                                }
                                else
                                {
                                        WriteOpers("*** Excess flood from %s",current->ip);
                                        log(DEFAULT,"Excess flood from: %s",current->ip);
                                        add_zline(120,Config->ServerName,"Flood from unregistered connection",current->ip);
                                        apply_lines(APPLY_ZLINES);
                                }
                                return;
                        }
                        if (current->recvq.length() > (unsigned)Config->NetBufferSize)
                        {
                                if (current->registered == 7)
                                {
                                        kill_link(current,"RecvQ exceeded");
                                }
                                else
                                {
                                        WriteOpers("*** Excess flood from %s",current->ip);
                                        log(DEFAULT,"Excess flood from: %s",current->ip);
                                        add_zline(120,Config->ServerName,"Flood from unregistered connection",current->ip);
                                        apply_lines(APPLY_ZLINES);
                                }
                                return;
                        }
                        // while there are complete lines to process...
                        while (current->BufferIsReady())
                        {
                                floodlines++;
                                if (TIME > current->reset_due)
                                {
                                        current->reset_due = TIME + current->threshold;
                                        current->lines_in = 0;
                                }
                                current->lines_in++;
                                if (current->lines_in > current->flood)
                                {
                                        log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
                                        WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
                                        kill_link(current,"Excess flood");
                                        return;
                                }
                                if ((floodlines > current->flood) && (current->flood != 0))
                                {
                                        if (current->registered == 7)
                                        {
                                                log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
                                                WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
                                                kill_link(current,"Excess flood");
                                        }
                                        else
                                        {
                                                add_zline(120,Config->ServerName,"Flood from unregistered connection",current->ip);
                                                apply_lines(APPLY_ZLINES);
                                        }
                                        return;
                                }
                                char sanitized[MAXBUF];
                                // use GetBuffer to copy single lines into the sanitized string
                                std::string single_line = current->GetBuffer();
                                current->bytes_in += single_line.length();
                                current->cmds_in++;
                                if (single_line.length()>512)
                                {
                                        log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
                                        WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
                                        kill_link(current,"Excess flood");
                                        return;
                                }
                                strlcpy(sanitized,single_line.c_str(),MAXBUF);
                                if (*sanitized)
                                {
                                        userrec* old_comp = fd_ref_table[currfd];
                                        // we're gonna re-scan to check if the nick is gone, after every
                                        // command - if it has, we're gonna bail
                                        process_buffer(sanitized,current);
                                        // look for the user's record in case it's changed... if theyve quit,
                                        // we cant do anything more with their buffer, so bail.
                                        // there used to be an ugly, slow loop here. Now we have a reference
                                        // table, life is much easier (and FASTER)
                                        userrec* new_comp = fd_ref_table[currfd];
                                        if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
                                        {
                                                return;
                                        }
                                        else
                                        {
                                                /* The user is still here, flush their buffer */
                                                current->FlushWriteBuf();
                                        }
                                }
                        }
                        return;
                }
                if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
                {
                        log(DEBUG,"killing: %s",cu->nick);
                        kill_link(cu,strerror(errno));
                        return;
                }
        }
        // result EAGAIN means nothing read
        else if (result == EAGAIN)
        {
        }
        else if (result == 0)
        {
                log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
                kill_link(cu,"Client exited");
                log(DEBUG,"Bailing from client exit");
                return;
        }
}


/**
 * This function is called once a second from the mainloop.
 * It is intended to do background checking on all the user structs, e.g.
 * stuff like ping checks, registration timeouts, etc.
 * The function returns false when it is finished, and true if
 * it needs to be run again (e.g. it has processed one of a batch of
 * QUIT messages, but couldnt continue iterating because the iterator
 * became invalid). This function is also responsible for checking
 * if InspSocket derived classes are timed out.
 */
bool DoBackgroundUserStuff(time_t TIME)
{
        unsigned int numsockets = module_sockets.size();
        for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
        {
                InspSocket* s = (InspSocket*)*a;
                if (s->Timeout(TIME))
                {
                        log(DEBUG,"Socket poll returned false, close and bail");
                        SE->DelFd(s->GetFd());
                        s->Close();
                        module_sockets.erase(a);
                        delete s;
                        break;
                }
                if (module_sockets.size() != numsockets) break;
        }
        /* TODO: We need a seperate hash containing only local users for this
         */
        for (std::vector<userrec*>::iterator count2 = local_users.begin(); count2 != local_users.end(); count2++)
        {
                /* Sanity checks for corrupted iterators (yes, really) */
                userrec* curr = NULL;
                if (*count2)
                        curr = (userrec*)(*count2);
                if ((long)curr == -1)
                        return false;

                if ((curr) && (curr->fd != 0)) /* XXX - why are we checking fd != 0? --w00t */
                {
                        int currfd = curr->fd;
                        // we don't check the state of remote users.
			if (IS_LOCAL(curr))
                        {
                                curr->FlushWriteBuf();
                                if (curr->GetWriteError() != "")
                                {
                                        log(DEBUG,"InspIRCd: write error: %s",curr->GetWriteError().c_str());
                                        kill_link(curr,curr->GetWriteError().c_str());
                                        return true;
                                }
                                // registration timeout -- didnt send USER/NICK/HOST in the time specified in
                                // their connection class.
                                if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != 7))
                                {
                                        log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
                                        kill_link(curr,"Registration timeout");
                                        return true;
                                }
                                if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr)))
                                {
                                        log(DEBUG,"signon exceed, registered=3, and modules ready, OK: %d %d",TIME,curr->signon);
                                        curr->dns_done = true;
                                        stats->statsDnsBad++;
                                        FullConnectUser(curr);
                                        if (fd_ref_table[currfd] != curr) // something changed, bail pronto
                                                return true;
                                 }
                                 if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr)))
                                 {
                                       log(DEBUG,"dns done, registered=3, and modules ready, OK");
                                       FullConnectUser(curr);
                                       if (fd_ref_table[currfd] != curr) // something changed, bail pronto
                                                return true;
                                 }
                                 if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7))
                                 {
                                       if ((!curr->lastping) && (curr->registered == 7))
                                       {
                                               log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick);
                                               kill_link(curr,"Ping timeout");
                                               return true;
                                       }
                                       Write(curr->fd,"PING :%s",Config->ServerName);
                                       log(DEBUG,"InspIRCd: pinging: %s",curr->nick);
                                       curr->lastping = 0;
                                       curr->nping = TIME+curr->pingmax;       // was hard coded to 120
                                }
                        }
                }
        }
        return false;
}

void OpenLog(char** argv, int argc)
{
        std::string logpath = GetFullProgDir(argv,argc) + "/ircd.log";
        Config->log_file = fopen(logpath.c_str(),"a+");
        if (!Config->log_file)
        {
                printf("ERROR: Could not write to logfile %s, bailing!\n\n",logpath.c_str());
                Exit(ERROR);
        }
#ifdef IS_CYGWIN
        printf("Logging to ircd.log...\n");
#else
        printf("Logging to %s...\n",logpath.c_str());
#endif
}


void CheckRoot()
{
        if (geteuid() == 0)
        {
                printf("WARNING!!! You are running an irc server as ROOT!!! DO NOT DO THIS!!!\n\n");
                log(DEFAULT,"InspIRCd: startup: not starting with UID 0!");
                Exit(ERROR);
        }
}


void CheckDie()
{
        if (*Config->DieValue)
        {
                printf("WARNING: %s\n\n",Config->DieValue);
                log(DEFAULT,"Ut-Oh, somebody didn't read their config file: '%s'",Config->DieValue);
                exit(0);
        }
}

void LoadAllModules()
{
        /* We must load the modules AFTER initializing the socket engine, now */
        MODCOUNT = -1;
	char configToken[MAXBUF];
        for (int count = 0; count < Config->ConfValueEnum("module",&Config->config_f); count++)
        {
                Config->ConfValue("module","name",count,configToken,&Config->config_f);
                printf("Loading module... \033[1;32m%s\033[0m\n",configToken);
                if (!ServerInstance->LoadModule(configToken))
                {
                        log(DEFAULT,"Exiting due to a module loader error.");
                        printf("\nThere was an error loading a module: %s\n\nYou might want to do './inspircd start' instead of 'bin/inspircd'\n\n",ServerInstance->ModuleError());
                        Exit(0);
                }
        }
        log(DEFAULT,"Total loaded modules: %lu",(unsigned long)MODCOUNT+1);
}