src/xline.cpp

   1 #include "inspircd.h"
   2 #include "inspircd_io.h"
   3 #include "inspircd_util.h"
   4 #include "inspircd_config.h"
   5 #include <unistd.h>
   6 #include <fcntl.h>
   7 #include <sys/errno.h>
   8 #include <sys/ioctl.h>
   9 #include <sys/utsname.h>
  10 #include <cstdio>
  11 #include <time.h>
  12 #include <string>
  13 #ifdef GCC3
  14 #include <ext/hash_map>
  15 #else
  16 #include <hash_map>
  17 #endif
  18 #include <map>
  19 #include <sstream>
  20 #include <vector>
  21 #include <errno.h>
  22 #include <deque>
  23 #include <errno.h>
  24 #include <unistd.h>
  25 #include <sched.h>
  26 #include "connection.h"
  27 #include "users.h"
  28 #include "servers.h"
  29 #include "ctables.h"
  30 #include "globals.h"
  31 #include "modules.h"
  32 #include "dynamic.h"
  33 #include "wildcard.h"
  34 #include "message.h"
  35 #include "commands.h"
  36 #include "xline.h"
  37
  38 #ifdef GCC3
  39 #define nspace __gnu_cxx
  40 #else
  41 #define nspace std
  42 #endif
  43
  44
  45 using namespace std;
  46
  47 extern int MODCOUNT;
  48 extern vector<Module*> modules;
  49 extern vector<ircd_module*> factory;
  50
  51 extern int LogLevel;
  52 extern char ServerName[MAXBUF];
  53 extern char Network[MAXBUF];
  54 extern char ServerDesc[MAXBUF];
  55 extern char AdminName[MAXBUF];
  56 extern char AdminEmail[MAXBUF];
  57 extern char AdminNick[MAXBUF];
  58 extern char diepass[MAXBUF];
  59 extern char restartpass[MAXBUF];
  60 extern char motd[MAXBUF];
  61 extern char rules[MAXBUF];
  62 extern char list[MAXBUF];
  63 extern char PrefixQuit[MAXBUF];
  64 extern char DieValue[MAXBUF];
  65
  66 extern int debugging;
  67 extern int WHOWAS_STALE;
  68 extern int WHOWAS_MAX;
  69 extern int DieDelay;
  70 extern time_t startup_time;
  71 extern int NetBufferSize;
  72 extern time_t nb_start;
  73
  74 extern std::vector<int> fd_reap;
  75 extern std::vector<std::string> module_names;
  76
  77 extern char bannerBuffer[MAXBUF];
  78 extern int boundPortCount;
  79 extern int portCount;
  80 extern int UDPportCount;
  81 extern int ports[MAXSOCKS];
  82 extern int defaultRoute;
  83
  84 extern std::vector<long> auth_cookies;
  85 extern std::stringstream config_f;
  86
  87 extern serverrec* me[32];
  88
  89 extern FILE *log_file;
  90
  91 namespace nspace
  92 {
  93         template<> struct nspace::hash<in_addr>
  94         {
  95                 size_t operator()(const struct in_addr &a) const
  96                 {
  97                         size_t q;
  98                         memcpy(&q,&a,sizeof(size_t));
  99                         return q;
 100                 }
 101         };
 102
 103         template<> struct nspace::hash<string>
 104         {
 105                 size_t operator()(const string &s) const
 106                 {
 107                         char a[MAXBUF];
 108                         static struct hash<const char *> strhash;
 109                         strcpy(a,s.c_str());
 110                         strlower(a);
 111                         return strhash(a);
 112                 }
 113         };
 114 }
 115
 116
 117 struct StrHashComp
 118 {
 119
 120         bool operator()(const string& s1, const string& s2) const
 121         {
 122                 char a[MAXBUF],b[MAXBUF];
 123                 strcpy(a,s1.c_str());
 124                 strcpy(b,s2.c_str());
 125                 return (strcasecmp(a,b) == 0);
 126         }
 127
 128 };
 129
 130 struct InAddr_HashComp
 131 {
 132
 133         bool operator()(const in_addr &s1, const in_addr &s2) const
 134         {
 135                 size_t q;
 136                 size_t p;
 137
 138                 memcpy(&q,&s1,sizeof(size_t));
 139                 memcpy(&p,&s2,sizeof(size_t));
 140
 141                 return (q == p);
 142         }
 143
 144 };
 145
 146
 147 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, StrHashComp> user_hash;
 148 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, StrHashComp> chan_hash;
 149 typedef nspace::hash_map<in_addr,string*, nspace::hash<in_addr>, InAddr_HashComp> address_cache;
 150 typedef std::deque<command_t> command_table;
 151
 152
 153 extern user_hash clientlist;
 154 extern chan_hash chanlist;
 155 extern user_hash whowas;
 156 extern command_table cmdlist;
 157 extern file_cache MOTD;
 158 extern file_cache RULES;
 159 extern address_cache IP;
 160
 161
 162 std::vector<KLine> klines;
 163 std::vector<GLine> glines;
 164 std::vector<ZLine> zlines;
 165 std::vector<QLine> qlines;
 166
 167 // Reads the default bans from the config file.
 168 // only a very small number of bans are defined
 169 // this way these days, such as qlines against
 170 // services nicks, etc.
 171
 172 void read_xline_defaults()
 173 {
 174         char ipmask[MAXBUF];
 175         char nick[MAXBUF];
 176         char host[MAXBUF];
 177         char reason[MAXBUF];
 178
 179         for (int i = 0; i < ConfValueEnum("badip",&config_f); i++)
 180         {
 181                 ConfValue("badip","ipmask",i,ipmask,&config_f);
 182                 ConfValue("badip","reason",i,reason,&config_f);
 183                 add_zline(0,"<Config>",reason,ipmask);
 184                 log(DEBUG,"Read Z line (badip tag): ipmask=%s reason=%s",ipmask,reason);
 185         }
 186
 187         for (int i = 0; i < ConfValueEnum("badnick",&config_f); i++)
 188         {
 189                 ConfValue("badnick","nick",i,nick,&config_f);
 190                 ConfValue("badnick","reason",i,reason,&config_f);
 191                 add_qline(0,"<Config>",reason,nick);
 192                 log(DEBUG,"Read Q line (badnick tag): nick=%s reason=%s",nick,reason);
 193         }
 194
 195         for (int i = 0; i < ConfValueEnum("badhost",&config_f); i++)
 196         {
 197                 ConfValue("badhost","host",i,host,&config_f);
 198                 ConfValue("badhost","reason",i,reason,&config_f);
 199                 add_kline(0,"<Config>",reason,host);
 200                 log(DEBUG,"Read K line (badhost tag): host=%s reason=%s",host,reason);
 201         }
 202 }
 203
 204 // adds a g:line
 205
 206 void add_gline(long duration, char* source, char* reason, char* hostmask)
 207 {
 208         GLine item;
 209         item.duration = duration;
 210         strncpy(item.hostmask,hostmask,MAXBUF);
 211         strncpy(item.reason,reason,MAXBUF);
 212         strncpy(item.source,source,MAXBUF);
 213         item.n_matches = 0;
 214         item.set_time = time(NULL);
 215         glines.push_back(item);
 216 }
 217
 218 // adds a q:line
 219
 220 void add_qline(long duration, char* source, char* reason, char* nickname)
 221 {
 222         QLine item;
 223         item.duration = duration;
 224         strncpy(item.nick,nickname,MAXBUF);
 225         strncpy(item.reason,reason,MAXBUF);
 226         strncpy(item.source,source,MAXBUF);
 227         item.n_matches = 0;
 228         item.set_time = time(NULL);
 229         qlines.push_back(item);
 230 }
 231
 232 // adds a z:line
 233
 234 void add_zline(long duration, char* source, char* reason, char* ipaddr)
 235 {
 236         ZLine item;
 237         item.duration = duration;
 238         strncpy(item.ipaddr,ipaddr,MAXBUF);
 239         strncpy(item.reason,reason,MAXBUF);
 240         strncpy(item.source,source,MAXBUF);
 241         item.n_matches = 0;
 242         item.set_time = time(NULL);
 243         zlines.push_back(item);
 244 }
 245
 246 // adds a k:line
 247
 248 void add_kline(long duration, char* source, char* reason, char* hostmask)
 249 {
 250         KLine item;
 251         item.duration = duration;
 252         strncpy(item.hostmask,hostmask,MAXBUF);
 253         strncpy(item.reason,reason,MAXBUF);
 254         strncpy(item.source,source,MAXBUF);
 255         item.n_matches = 0;
 256         item.set_time = time(NULL);
 257         klines.push_back(item);
 258 }
 259
 260 // deletes a g:line, returns true if the line existed and was removed
 261
 262 bool del_gline(char* hostmask)
 263 {
 264         for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++)
 265         {
 266                 if (!strcasecmp(hostmask,i->hostmask))
 267                 {
 268                         glines.erase(i);
 269                         return true;
 270                 }
 271         }
 272         return false;
 273 }
 274
 275 // deletes a q:line, returns true if the line existed and was removed
 276
 277 bool del_qline(char* nickname)
 278 {
 279         for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++)
 280         {
 281                 if (!strcasecmp(nickname,i->nick))
 282                 {
 283                         qlines.erase(i);
 284                         return true;
 285                 }
 286         }
 287         return false;
 288 }
 289
 290 // deletes a z:line, returns true if the line existed and was removed
 291
 292 bool del_zline(char* ipaddr)
 293 {
 294         for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++)
 295         {
 296                 if (!strcasecmp(ipaddr,i->ipaddr))
 297                 {
 298                         zlines.erase(i);
 299                         return true;
 300                 }
 301         }
 302         return false;
 303 }
 304
 305 // deletes a k:line, returns true if the line existed and was removed
 306
 307 bool del_kline(char* hostmask)
 308 {
 309         for (std::vector<KLine>::iterator i = klines.begin(); i != klines.end(); i++)
 310         {
 311                 if (!strcasecmp(hostmask,i->hostmask))
 312                 {
 313                         klines.erase(i);
 314                         return true;
 315                 }
 316         }
 317         return false;
 318 }
 319
 320 // returns a pointer to the reason if a nickname matches a qline, NULL if it didnt match
 321
 322 char* matches_qline(const char* nick)
 323 {
 324         for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++)
 325         {
 326                 if (match(nick,i->nick))
 327                 {
 328                         return i->reason;
 329                 }
 330         }
 331         return NULL;
 332 }
 333
 334 // returns a pointer to the reason if a host matches a gline, NULL if it didnt match
 335
 336 char* matches_gline(const char* host)
 337 {
 338         for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++)
 339         {
 340                 if (match(host,i->hostmask))
 341                 {
 342                         return i->reason;
 343                 }
 344         }
 345         return NULL;
 346 }
 347
 348 // returns a pointer to the reason if an ip address matches a zline, NULL if it didnt match
 349
 350 char* matches_zline(const char* ipaddr)
 351 {
 352         for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++)
 353         {
 354                 if (match(ipaddr,i->ipaddr))
 355                 {
 356                         return i->reason;
 357                 }
 358         }
 359         return NULL;
 360 }
 361
 362 // returns a pointer to the reason if a host matches a kline, NULL if it didnt match
 363
 364 char* matches_kline(const char* host)
 365 {
 366         for (std::vector<KLine>::iterator i = klines.begin(); i != klines.end(); i++)
 367         {
 368                 if (match(host,i->hostmask))
 369                 {
 370                         return i->reason;
 371                 }
 372         }
 373         return NULL;
 374 }
 375
 376 // removes lines that have expired
 377
 378 void expire_lines()
 379 {
 380         bool go_again = true;
 381         time_t current = time(NULL);
 382
 383         // because we mess up an iterator when we remove from the vector, we must bail from
 384         // the loop early if we delete an item, therefore this outer while loop is required.
 385         while (go_again)
 386         {
 387                 go_again = false;
 388
 389                 for (std::vector<KLine>::iterator i = klines.begin(); i != klines.end(); i++)
 390                 {
 391                         if ((current > (i->duration + i->set_time)) && (i->duration > 0))
 392                         {
 393                                 WriteOpers("Expiring timed K-Line %s (set by %s %d seconds ago)",i->hostmask,i->source,i->duration);
 394                                 klines.erase(i);
 395                                 go_again = true;
 396                                 break;
 397                         }
 398                 }
 399
 400                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++)
 401                 {
 402                         if ((current > (i->duration + i->set_time)) && (i->duration > 0))
 403                         {
 404                                 WriteOpers("Expiring timed G-Line %s (set by %s %d seconds ago)",i->hostmask,i->source,i->duration);
 405                                 glines.erase(i);
 406                                 go_again = true;
 407                                 break;
 408                         }
 409                 }
 410
 411                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++)
 412                 {
 413                         if ((current > (i->duration + i->set_time)) && (i->duration > 0))
 414                         {
 415                                 WriteOpers("Expiring timed Z-Line %s (set by %s %d seconds ago)",i->ipaddr,i->source,i->duration);
 416                                 zlines.erase(i);
 417                                 go_again = true;
 418                                 break;
 419                         }
 420                 }
 421
 422                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++)
 423                 {
 424                         if ((current > (i->duration + i->set_time)) && (i->duration > 0))
 425                         {
 426                                 WriteOpers("Expiring timed Q-Line %s (set by %s %d seconds ago)",i->nick,i->source,i->duration);
 427                                 qlines.erase(i);
 428                                 go_again = true;
 429                                 break;
 430                         }
 431                 }
 432         }
 433 }
 434
 435 // applies lines, removing clients and changing nicks etc as applicable
 436
 437 void apply_lines()
 438 {
 439         bool go_again = true;
 440         char reason[MAXBUF];
 441         char host[MAXBUF];
 442
 443         while (go_again)
 444         {
 445                 go_again = false;
 446                 for (user_hash::const_iterator u = clientlist.begin(); u != clientlist.end(); u++)
 447                 {
 448                         if (!strcasecmp(u->second->server,ServerName))
 449                         {
 450                                 snprintf(host,MAXBUF,"%s@%s",u->second->ident,u->second->host);
 451                                 char* check = matches_gline(host);
 452                                 if (check)
 453                                 {
 454                                         WriteOpers("*** User %s matches G-Line: %s",u->second->nick,check);
 455                                         snprintf(reason,MAXBUF,"G-Lined: %s",check);
 456                                         kill_link(u->second,reason);
 457                                         go_again = true;
 458                                         break;
 459                                 }
 460                         }
 461                 }
 462
 463                 for (user_hash::const_iterator u = clientlist.begin(); u != clientlist.end(); u++)
 464                 {
 465                         if (!strcasecmp(u->second->server,ServerName))
 466                         {
 467                                 snprintf(host,MAXBUF,"%s@%s",u->second->ident,u->second->host);
 468                                 char* check = matches_kline(host);
 469                                 if (check)
 470                                 {
 471                                         WriteOpers("*** User %s matches K-Line: %s",u->second->nick,check);
 472                                         snprintf(reason,MAXBUF,"K-Lined: %s",check);
 473                                         kill_link(u->second,reason);
 474                                         go_again = true;
 475                                         break;
 476                                 }
 477                         }
 478                 }
 479
 480                 for (user_hash::const_iterator u = clientlist.begin(); u != clientlist.end(); u++)
 481                 {
 482                         if (!strcasecmp(u->second->server,ServerName))
 483                         {
 484                                 char* check = matches_qline(u->second->nick);
 485                                 if (check)
 486                                 {
 487                                         snprintf(reason,MAXBUF,"Matched Q-Lined nick: %s",check);
 488                                         WriteOpers("*** Q-Lined nickname %s from %s: %s",u->second->nick,u->second->host,check);
 489                                         WriteServ(u->second->fd,"432 %s %s :Invalid nickname: %s",u->second->nick,u->second->nick,check);
 490                                         kill_link(u->second,reason);
 491                                         go_again = true;
 492                                         break;
 493                                 }
 494                         }
 495                 }
 496
 497                 for (user_hash::const_iterator u = clientlist.begin(); u != clientlist.end(); u++)
 498                 {
 499                         if (!strcasecmp(u->second->server,ServerName))
 500                         {
 501                                 char* check = matches_zline(u->second->ip);
 502                                 if (check)
 503                                 {
 504                                         WriteOpers("*** User %s matches Z-Line: %s",u->second->nick,u->second->host,check);
 505                                         WriteServ(u->second->fd,"432 %s %s :Invalid nickname: %s",u->second->nick,u->second->nick,check);
 506                                         go_again = true;
 507                                         break;
 508                                 }
 509                         }
 510                 }
 511
 512         }
 513 }
 514
 515 void stats_k(userrec* user)
 516 {
 517         for (std::vector<KLine>::iterator i = klines.begin(); i != klines.end(); i++)
 518         {
 519                 WriteServ(user->fd,"216 %s :%s %d %d %s %s",user->nick,i->hostmask,i->set_time,i->duration,i->source,i->reason);
 520         }
 521 }
 522
 523 void stats_g(userrec* user)
 524 {
 525         for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++)
 526         {
 527                 WriteServ(user->fd,"223 %s :%s %d %d %s %s",user->nick,i->hostmask,i->set_time,i->duration,i->source,i->reason);
 528         }
 529 }
 530
 531 void stats_q(userrec* user)
 532 {
 533         for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++)
 534         {
 535                 WriteServ(user->fd,"217 %s :%s %d %d %s %s",user->nick,i->nick,i->set_time,i->duration,i->source,i->reason);
 536         }
 537 }
 538
 539 void stats_z(userrec* user)
 540 {
 541         for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++)
 542         {
 543                 WriteServ(user->fd,"223 %s :%s %d %d %s %s",user->nick,i->ipaddr,i->set_time,i->duration,i->source,i->reason);
 544         }
 545 }
 546
 547
 548