modules/m_services.c

   1 /* modules/m_services.c
   2  *   Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk>
   3  *   Copyright (C) 2005 ircd-ratbox development team
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  * 1.Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * 2.Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * 3.The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  21  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  25  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  26  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * $Id: m_services.c 1907 2006-08-29 19:18:15Z jilles $
  30  */
  31
  32 #include "stdinc.h"
  33
  34 #include "send.h"
  35 #include "channel.h"
  36 #include "client.h"
  37 #include "common.h"
  38 #include "config.h"
  39 #include "ircd.h"
  40 #include "numeric.h"
  41 #include "s_conf.h"
  42 #include "s_newconf.h"
  43 #include "s_serv.h"
  44 #include "hash.h"
  45 #include "msg.h"
  46 #include "parse.h"
  47 #include "modules.h"
  48 #include "whowas.h"
  49 #include "monitor.h"
  50
  51 static int _modinit(void);
  52 static void _moddeinit(void);
  53
  54 static void mark_services(void);
  55 static void unmark_services(void);
  56
  57 static int me_su(struct Client *, struct Client *, int, const char **);
  58 static int me_login(struct Client *, struct Client *, int, const char **);
  59 static int me_rsfnc(struct Client *, struct Client *, int, const char **);
  60 static int me_nickdelay(struct Client *, struct Client *, int, const char **);
  61
  62 static void h_svc_server_introduced(hook_data_client *);
  63 static void h_svc_whois(hook_data_client *);
  64 static void h_svc_stats(hook_data_int *);
  65 static void h_svc_conf_read_start(void *);
  66 static void h_svc_conf_read_end(void *);
  67
  68 struct Message su_msgtab = {
  69         "SU", 0, 0, 0, MFLG_SLOW,
  70         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_su, 2}, mg_ignore}
  71 };
  72 struct Message login_msgtab = {
  73         "LOGIN", 0, 0, 0, MFLG_SLOW,
  74         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_login, 2}, mg_ignore}
  75 };
  76 struct Message rsfnc_msgtab = {
  77         "RSFNC", 0, 0, 0, MFLG_SLOW,
  78         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_rsfnc, 4}, mg_ignore}
  79 };
  80 struct Message nickdelay_msgtab = {
  81         "NICKDELAY", 0, 0, 0, MFLG_SLOW,
  82         {mg_unreg, mg_ignore, mg_ignore, mg_ignore, {me_nickdelay, 3}, mg_ignore}
  83 };
  84
  85 mapi_clist_av1 services_clist[] = {
  86         &su_msgtab, &login_msgtab, &rsfnc_msgtab, &nickdelay_msgtab, NULL
  87 };
  88 mapi_hfn_list_av1 services_hfnlist[] = {
  89         { "doing_stats",        (hookfn) h_svc_stats },
  90         { "doing_whois",        (hookfn) h_svc_whois },
  91         { "doing_whois_global", (hookfn) h_svc_whois },
  92         { "server_introduced",  (hookfn) h_svc_server_introduced },
  93         { "conf_read_start", (hookfn) h_svc_conf_read_start },
  94         { "conf_read_end", (hookfn) h_svc_conf_read_end },
  95         { NULL, NULL }
  96 };
  97
  98 DECLARE_MODULE_AV1(services, _modinit, _moddeinit, services_clist, NULL, services_hfnlist, "$Revision: 1907 $");
  99
 100 static int
 101 _modinit(void)
 102 {
 103         mark_services();
 104         return 0;
 105 }
 106
 107 static void
 108 _moddeinit(void)
 109 {
 110         unmark_services();
 111 }
 112
 113 static int
 114 me_su(struct Client *client_p, struct Client *source_p,
 115         int parc, const char *parv[])
 116 {
 117         struct Client *target_p;
 118
 119         if(!(source_p->flags & FLAGS_SERVICE))
 120         {
 121                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 122                         "Non-service server %s attempting to execute services-only command SU", source_p->name);
 123                 return 0;
 124         }
 125
 126         if((target_p = find_client(parv[1])) == NULL)
 127                 return 0;
 128
 129         if(!target_p->user)
 130                 return 0;
 131
 132         if(EmptyString(parv[2]))
 133                 target_p->user->suser[0] = '\0';
 134         else
 135                 rb_strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser));
 136
 137         sendto_common_channels_local_butone(target_p, CLICAP_ACCOUNT_NOTIFY, ":%s!%s@%s ACCOUNT %s",
 138                                             target_p->name, target_p->username, target_p->host,
 139                                             EmptyString(target_p->user->suser) ? "*" : target_p->user->suser);
 140
 141         invalidate_bancache_user(target_p);
 142
 143         return 0;
 144 }
 145
 146 static int
 147 me_login(struct Client *client_p, struct Client *source_p,
 148         int parc, const char *parv[])
 149 {
 150         if(!IsPerson(source_p))
 151                 return 0;
 152
 153         rb_strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser));
 154         return 0;
 155 }
 156
 157 static int
 158 clean_nick(const char *nick)
 159 {
 160         int len = 0;
 161
 162         if(EmptyString(nick) || *nick == '-' || IsDigit(*nick))
 163                 return 0;
 164
 165         for(; *nick; nick++)
 166         {
 167                 len++;
 168                 if(!IsNickChar(*nick))
 169                         return 0;
 170         }
 171
 172         if(len >= NICKLEN)
 173                 return 0;
 174
 175         return 1;
 176 }
 177
 178 static int
 179 me_rsfnc(struct Client *client_p, struct Client *source_p,
 180         int parc, const char *parv[])
 181 {
 182         struct Client *target_p;
 183         struct Client *exist_p;
 184         time_t newts, curts;
 185         char note[NICKLEN + 10];
 186
 187         if(!(source_p->flags & FLAGS_SERVICE))
 188         {
 189                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 190                         "Non-service server %s attempting to execute services-only command RSFNC", source_p->name);
 191                 return 0;
 192         }
 193
 194         if((target_p = find_person(parv[1])) == NULL)
 195                 return 0;
 196
 197         if(!MyClient(target_p))
 198                 return 0;
 199
 200         if(!clean_nick(parv[2]))
 201                 return 0;
 202
 203         curts = atol(parv[4]);
 204
 205         /* if tsinfo is different from what it was when services issued the
 206          * RSFNC, then we ignore it.  This can happen when a client changes
 207          * nicknames before the RSFNC arrives.. --anfl
 208          */
 209         if(target_p->tsinfo != curts)
 210                 return 0;
 211
 212         if((exist_p = find_named_client(parv[2])))
 213         {
 214                 char buf[BUFSIZE];
 215
 216                 /* this would be one hell of a race condition to trigger
 217                  * this one given the tsinfo check above, but its here for
 218                  * safety --anfl
 219                  */
 220                 if(target_p == exist_p)
 221                         goto doit;
 222
 223                 if(MyClient(exist_p))
 224                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 225                                 me.name, exist_p->name);
 226
 227                 exist_p->flags |= FLAGS_KILLED;
 228                 /* Do not send kills to servers for unknowns -- jilles */
 229                 if(IsClient(exist_p))
 230                 {
 231                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 232                                                 me.name);
 233                         sendto_realops_snomask(SNO_SKILL, L_ALL,
 234                                         "Nick collision due to services forced nick change on %s",
 235                                         parv[2]);
 236                 }
 237
 238                 rb_snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 239                         me.name);
 240                 exit_client(NULL, exist_p, &me, buf);
 241         }
 242
 243 doit:
 244         newts = atol(parv[3]);
 245
 246         /* timestamp is older than 15mins, ignore it */
 247         if(newts < (rb_current_time() - 900))
 248                 newts = rb_current_time() - 900;
 249
 250         target_p->tsinfo = newts;
 251
 252         monitor_signoff(target_p);
 253
 254         invalidate_bancache_user(target_p);
 255
 256         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 257                         "Nick change: From %s to %s [%s@%s]",
 258                         target_p->name, parv[2], target_p->username,
 259                         target_p->host);
 260
 261         sendto_common_channels_local(target_p, NOCAPS, ":%s!%s@%s NICK :%s",
 262                                 target_p->name, target_p->username,
 263                                 target_p->host, parv[2]);
 264
 265         add_history(target_p, 1);
 266         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 267                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 268
 269         del_from_client_hash(target_p->name, target_p);
 270         rb_strlcpy(target_p->name, parv[2], NICKLEN);
 271         add_to_client_hash(target_p->name, target_p);
 272
 273         monitor_signon(target_p);
 274
 275         del_all_accepts(target_p);
 276
 277         rb_snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name);
 278         rb_note(target_p->localClient->F, note);
 279         return 0;
 280 }
 281
 282 /*
 283 ** me_nickdelay
 284 **      parv[1] = duration in seconds (0 to remove)
 285 **      parv[2] = nick
 286 */
 287 static int
 288 me_nickdelay(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 289 {
 290         int duration;
 291         struct nd_entry *nd;
 292
 293         if(!(source_p->flags & FLAGS_SERVICE))
 294         {
 295                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 296                         "Non-service server %s attempting to execute services-only command NICKDELAY", source_p->name);
 297                 return 0;
 298         }
 299
 300         duration = atoi(parv[1]);
 301         if (duration <= 0)
 302         {
 303                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 304                 if (nd != NULL)
 305                         free_nd_entry(nd);
 306         }
 307         else
 308         {
 309                 if (duration > 86400)
 310                         duration = 86400;
 311                 add_nd_entry(parv[2]);
 312                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 313                 if (nd != NULL)
 314                         nd->expire = rb_current_time() + duration;
 315         }
 316
 317         return 0;
 318 }
 319
 320 static void
 321 h_svc_server_introduced(hook_data_client *hdata)
 322 {
 323         rb_dlink_node *ptr;
 324
 325         RB_DLINK_FOREACH(ptr, service_list.head)
 326         {
 327                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 328                 {
 329                         hdata->target->flags |= FLAGS_SERVICE;
 330                         return;
 331                 }
 332         }
 333 }
 334
 335 static void
 336 h_svc_whois(hook_data_client *data)
 337 {
 338         char *p = data->target->user->suser;
 339         if(!EmptyString(p))
 340         {
 341                 /* Try to strip off any leading digits as this may be used to
 342                  * store both an ID number and an account name in one field.
 343                  * If only digits are present, leave as is.
 344                  */
 345                 while(IsDigit(*p))
 346                         p++;
 347                 if(*p == '\0')
 348                         p = data->target->user->suser;
 349
 350                 sendto_one_numeric(data->client, RPL_WHOISLOGGEDIN,
 351                                 form_str(RPL_WHOISLOGGEDIN),
 352                                 data->target->name, p);
 353         }
 354 }
 355
 356 static void
 357 h_svc_stats(hook_data_int *data)
 358 {
 359         char statchar = (char) data->arg2;
 360         rb_dlink_node *ptr;
 361
 362         if (statchar == 'U' && IsOper(data->client))
 363         {
 364                 RB_DLINK_FOREACH(ptr, service_list.head)
 365                 {
 366                         sendto_one_numeric(data->client, RPL_STATSULINE,
 367                                                 form_str(RPL_STATSULINE),
 368                                                 (const char *)ptr->data, "*", "*", "s");
 369                 }
 370         }
 371 }
 372
 373 static void
 374 h_svc_conf_read_start(void *dummy)
 375 {
 376         unmark_services();
 377 }
 378
 379 static void
 380 unmark_services(void)
 381 {
 382         struct Client *target_p;
 383         rb_dlink_node *ptr;
 384
 385         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 386         {
 387                 target_p = ptr->data;
 388
 389                 target_p->flags &= ~FLAGS_SERVICE;
 390         }
 391 }
 392
 393 static void
 394 h_svc_conf_read_end(void *dummy)
 395 {
 396         mark_services();
 397 }
 398
 399 static void
 400 mark_services(void)
 401 {
 402         struct Client *target_p;
 403         rb_dlink_node *ptr;
 404
 405         RB_DLINK_FOREACH(ptr, service_list.head)
 406         {
 407                 target_p = find_server(NULL, (const char *)ptr->data);
 408
 409                 if (target_p)
 410                         target_p->flags |= FLAGS_SERVICE;
 411         }
 412 }