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 }
 105
 106 static void
 107 _moddeinit(void)
 108 {
 109         unmark_services();
 110 }
 111
 112 static int
 113 me_su(struct Client *client_p, struct Client *source_p,
 114         int parc, const char *parv[])
 115 {
 116         struct Client *target_p;
 117
 118         if(!(source_p->flags & FLAGS_SERVICE))
 119         {
 120                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 121                         "Non-service server %s attempting to execute services-only command SU", source_p->name);
 122                 return 0;
 123         }
 124
 125         if((target_p = find_client(parv[1])) == NULL)
 126                 return 0;
 127
 128         if(!target_p->user)
 129                 return 0;
 130
 131         if(EmptyString(parv[2]))
 132                 target_p->user->suser[0] = '\0';
 133         else
 134                 rb_strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser));
 135
 136         sendto_common_channels_local_butone(target_p, CLICAP_ACCOUNT_NOTIFY, ":%s!%s@%s ACCOUNT %s",
 137                                             target_p->name, target_p->username, target_p->host,
 138                                             EmptyString(target_p->user->suser) ? "*" : target_p->user->suser);
 139
 140         invalidate_bancache_user(target_p);
 141
 142         return 0;
 143 }
 144
 145 static int
 146 me_login(struct Client *client_p, struct Client *source_p,
 147         int parc, const char *parv[])
 148 {
 149         if(!IsPerson(source_p))
 150                 return 0;
 151
 152         rb_strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser));
 153         return 0;
 154 }
 155
 156 static int
 157 clean_nick(const char *nick)
 158 {
 159         int len = 0;
 160
 161         if(EmptyString(nick) || *nick == '-' || IsDigit(*nick))
 162                 return 0;
 163
 164         for(; *nick; nick++)
 165         {
 166                 len++;
 167                 if(!IsNickChar(*nick))
 168                         return 0;
 169         }
 170
 171         if(len >= NICKLEN)
 172                 return 0;
 173
 174         return 1;
 175 }
 176
 177 static int
 178 me_rsfnc(struct Client *client_p, struct Client *source_p,
 179         int parc, const char *parv[])
 180 {
 181         struct Client *target_p;
 182         struct Client *exist_p;
 183         time_t newts, curts;
 184         char note[NICKLEN + 10];
 185
 186         if(!(source_p->flags & FLAGS_SERVICE))
 187         {
 188                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 189                         "Non-service server %s attempting to execute services-only command RSFNC", source_p->name);
 190                 return 0;
 191         }
 192
 193         if((target_p = find_person(parv[1])) == NULL)
 194                 return 0;
 195
 196         if(!MyClient(target_p))
 197                 return 0;
 198
 199         if(!clean_nick(parv[2]))
 200                 return 0;
 201
 202         curts = atol(parv[4]);
 203
 204         /* if tsinfo is different from what it was when services issued the
 205          * RSFNC, then we ignore it.  This can happen when a client changes
 206          * nicknames before the RSFNC arrives.. --anfl
 207          */
 208         if(target_p->tsinfo != curts)
 209                 return 0;
 210
 211         if((exist_p = find_named_client(parv[2])))
 212         {
 213                 char buf[BUFSIZE];
 214
 215                 /* this would be one hell of a race condition to trigger
 216                  * this one given the tsinfo check above, but its here for
 217                  * safety --anfl
 218                  */
 219                 if(target_p == exist_p)
 220                         goto doit;
 221
 222                 if(MyClient(exist_p))
 223                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 224                                 me.name, exist_p->name);
 225
 226                 exist_p->flags |= FLAGS_KILLED;
 227                 /* Do not send kills to servers for unknowns -- jilles */
 228                 if(IsClient(exist_p))
 229                 {
 230                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 231                                                 me.name);
 232                         sendto_realops_snomask(SNO_SKILL, L_ALL,
 233                                         "Nick collision due to services forced nick change on %s",
 234                                         parv[2]);
 235                 }
 236
 237                 rb_snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 238                         me.name);
 239                 exit_client(NULL, exist_p, &me, buf);
 240         }
 241
 242 doit:
 243         newts = atol(parv[3]);
 244
 245         /* timestamp is older than 15mins, ignore it */
 246         if(newts < (rb_current_time() - 900))
 247                 newts = rb_current_time() - 900;
 248
 249         target_p->tsinfo = newts;
 250
 251         monitor_signoff(target_p);
 252
 253         invalidate_bancache_user(target_p);
 254
 255         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 256                         "Nick change: From %s to %s [%s@%s]",
 257                         target_p->name, parv[2], target_p->username,
 258                         target_p->host);
 259
 260         sendto_common_channels_local(target_p, NOCAPS, ":%s!%s@%s NICK :%s",
 261                                 target_p->name, target_p->username,
 262                                 target_p->host, parv[2]);
 263
 264         add_history(target_p, 1);
 265         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 266                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 267
 268         del_from_client_hash(target_p->name, target_p);
 269         rb_strlcpy(target_p->name, parv[2], NICKLEN);
 270         add_to_client_hash(target_p->name, target_p);
 271
 272         monitor_signon(target_p);
 273
 274         del_all_accepts(target_p);
 275
 276         rb_snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name);
 277         rb_note(target_p->localClient->F, note);
 278         return 0;
 279 }
 280
 281 /*
 282 ** me_nickdelay
 283 **      parv[1] = duration in seconds (0 to remove)
 284 **      parv[2] = nick
 285 */
 286 static int
 287 me_nickdelay(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 288 {
 289         int duration;
 290         struct nd_entry *nd;
 291
 292         if(!(source_p->flags & FLAGS_SERVICE))
 293         {
 294                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 295                         "Non-service server %s attempting to execute services-only command NICKDELAY", source_p->name);
 296                 return 0;
 297         }
 298
 299         duration = atoi(parv[1]);
 300         if (duration <= 0)
 301         {
 302                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 303                 if (nd != NULL)
 304                         free_nd_entry(nd);
 305         }
 306         else
 307         {
 308                 if (duration > 86400)
 309                         duration = 86400;
 310                 add_nd_entry(parv[2]);
 311                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 312                 if (nd != NULL)
 313                         nd->expire = rb_current_time() + duration;
 314         }
 315
 316         return 0;
 317 }
 318
 319 static void
 320 h_svc_server_introduced(hook_data_client *hdata)
 321 {
 322         rb_dlink_node *ptr;
 323
 324         RB_DLINK_FOREACH(ptr, service_list.head)
 325         {
 326                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 327                 {
 328                         hdata->target->flags |= FLAGS_SERVICE;
 329                         return;
 330                 }
 331         }
 332 }
 333
 334 static void
 335 h_svc_whois(hook_data_client *data)
 336 {
 337         char *p = data->target->user->suser;
 338         if(!EmptyString(p))
 339         {
 340                 /* Try to strip off any leading digits as this may be used to
 341                  * store both an ID number and an account name in one field.
 342                  * If only digits are present, leave as is.
 343                  */
 344                 while(IsDigit(*p))
 345                         p++;
 346                 if(*p == '\0')
 347                         p = data->target->user->suser;
 348
 349                 sendto_one_numeric(data->client, RPL_WHOISLOGGEDIN,
 350                                 form_str(RPL_WHOISLOGGEDIN),
 351                                 data->target->name, p);
 352         }
 353 }
 354
 355 static void
 356 h_svc_stats(hook_data_int *data)
 357 {
 358         char statchar = (char) data->arg2;
 359         rb_dlink_node *ptr;
 360
 361         if (statchar == 'U' && IsOper(data->client))
 362         {
 363                 RB_DLINK_FOREACH(ptr, service_list.head)
 364                 {
 365                         sendto_one_numeric(data->client, RPL_STATSULINE,
 366                                                 form_str(RPL_STATSULINE),
 367                                                 (const char *)ptr->data, "*", "*", "s");
 368                 }
 369         }
 370 }
 371
 372 static void
 373 h_svc_conf_read_start(void *dummy)
 374 {
 375         unmark_services();
 376 }
 377
 378 static void
 379 unmark_services(void)
 380 {
 381         struct Client *target_p;
 382         rb_dlink_node *ptr;
 383
 384         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 385         {
 386                 target_p = ptr->data;
 387
 388                 target_p->flags &= ~FLAGS_SERVICE;
 389         }
 390 }
 391
 392 static void
 393 h_svc_conf_read_end(void *dummy)
 394 {
 395         mark_services();
 396 }
 397
 398 static void
 399 mark_services(void)
 400 {
 401         struct Client *target_p;
 402         rb_dlink_node *ptr;
 403
 404         RB_DLINK_FOREACH(ptr, service_list.head)
 405         {
 406                 target_p = find_server(NULL, (const char *)ptr->data);
 407
 408                 if (target_p)
 409                         target_p->flags |= FLAGS_SERVICE;
 410         }
 411 }