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
  30 #include "stdinc.h"
  31
  32 #include "send.h"
  33 #include "channel.h"
  34 #include "client.h"
  35 #include "defaults.h"
  36 #include "ircd.h"
  37 #include "numeric.h"
  38 #include "s_conf.h"
  39 #include "s_newconf.h"
  40 #include "s_serv.h"
  41 #include "hash.h"
  42 #include "msg.h"
  43 #include "parse.h"
  44 #include "modules.h"
  45 #include "whowas.h"
  46 #include "monitor.h"
  47 #include "supported.h"
  48
  49 static const char services_desc[] = "Provides support for running a services daemon";
  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 void me_su(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  58 static void me_login(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  59 static void me_rsfnc(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  60 static void me_nickdelay(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  61
  62 static void h_svc_server_introduced(void *);
  63 static void h_svc_whois(void *);
  64 static void h_svc_stats(void *);
  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, 0,
  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, 0,
  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, 0,
  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, 0,
  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",        h_svc_stats },
  90         { "doing_whois",        h_svc_whois },
  91         { "doing_whois_global", h_svc_whois },
  92         { "server_introduced",  h_svc_server_introduced },
  93         { "conf_read_start", h_svc_conf_read_start },
  94         { "conf_read_end", h_svc_conf_read_end },
  95         { NULL, NULL }
  96 };
  97
  98 DECLARE_MODULE_AV2(services, _modinit, _moddeinit, services_clist, NULL, services_hfnlist, NULL, NULL, services_desc);
  99
 100 static int
 101 _modinit(void)
 102 {
 103         mark_services();
 104         add_isupport("FNC", isupport_string, "");
 105         return 0;
 106 }
 107
 108 static void
 109 _moddeinit(void)
 110 {
 111         delete_isupport("FNC");
 112         unmark_services();
 113 }
 114
 115 static void
 116 me_su(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
 117         int parc, const char *parv[])
 118 {
 119         struct Client *target_p;
 120
 121         if(!(source_p->flags & FLAGS_SERVICE))
 122         {
 123                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 124                         "Non-service server %s attempting to execute services-only command SU", source_p->name);
 125                 return;
 126         }
 127
 128         if((target_p = find_client(parv[1])) == NULL)
 129                 return;
 130
 131         if(!target_p->user)
 132                 return;
 133
 134         if(EmptyString(parv[2]))
 135                 target_p->user->suser[0] = '\0';
 136         else
 137                 rb_strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser));
 138
 139         sendto_common_channels_local(target_p, CLICAP_ACCOUNT_NOTIFY, NOCAPS, ":%s!%s@%s ACCOUNT %s",
 140                                             target_p->name, target_p->username, target_p->host,
 141                                             EmptyString(target_p->user->suser) ? "*" : target_p->user->suser);
 142
 143         if (MyClient(target_p))
 144         {
 145                 if (EmptyString(target_p->user->suser))
 146                         sendto_one(target_p, form_str(RPL_LOGGEDOUT), me.name, target_p->name,
 147                                 target_p->name, target_p->username, target_p->host);
 148                 else
 149                         sendto_one(target_p, form_str(RPL_LOGGEDIN), me.name, target_p->name,
 150                                 target_p->name, target_p->username, target_p->host, parv[2], parv[2]);
 151         }
 152
 153         invalidate_bancache_user(target_p);
 154 }
 155
 156 static void
 157 me_login(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
 158         int parc, const char *parv[])
 159 {
 160         if(!IsPerson(source_p))
 161                 return;
 162
 163         rb_strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser));
 164 }
 165
 166 static void
 167 me_rsfnc(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
 168         int parc, const char *parv[])
 169 {
 170         struct Client *target_p;
 171         struct Client *exist_p;
 172         time_t newts, curts;
 173         struct nd_entry *nd;
 174         char note[NAMELEN + 10];
 175
 176         if(!(source_p->flags & FLAGS_SERVICE))
 177         {
 178                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 179                         "Non-service server %s attempting to execute services-only command RSFNC", source_p->name);
 180                 return;
 181         }
 182
 183         if((target_p = find_person(parv[1])) == NULL)
 184                 return;
 185
 186         if(!MyClient(target_p))
 187                 return;
 188
 189         if(!clean_nick(parv[2], 0) || IsDigit(parv[2][0]))
 190                 return;
 191
 192         curts = atol(parv[4]);
 193
 194         /* if tsinfo is different from what it was when services issued the
 195          * RSFNC, then we ignore it.  This can happen when a client changes
 196          * nicknames before the RSFNC arrives.. --anfl
 197          */
 198         if(target_p->tsinfo != curts)
 199                 return;
 200
 201         if((exist_p = find_named_client(parv[2])))
 202         {
 203                 char buf[BUFSIZE];
 204
 205                 /* this would be one hell of a race condition to trigger
 206                  * this one given the tsinfo check above, but its here for
 207                  * safety --anfl
 208                  */
 209                 if(target_p == exist_p)
 210                         goto doit;
 211
 212                 if(MyClient(exist_p))
 213                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 214                                 me.name, exist_p->name);
 215
 216                 exist_p->flags |= FLAGS_KILLED;
 217                 /* Do not send kills to servers for unknowns -- jilles */
 218                 if(IsClient(exist_p))
 219                 {
 220                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 221                                                 me.name);
 222                         sendto_realops_snomask(SNO_SKILL, L_ALL,
 223                                         "Nick collision due to services forced nick change on %s",
 224                                         parv[2]);
 225                 }
 226
 227                 snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 228                         me.name);
 229                 exit_client(NULL, exist_p, &me, buf);
 230         }
 231
 232 doit:
 233         newts = atol(parv[3]);
 234
 235         /* timestamp is older than 15mins, ignore it */
 236         if(newts < (rb_current_time() - 900))
 237                 newts = rb_current_time() - 900;
 238
 239         target_p->tsinfo = newts;
 240
 241         monitor_signoff(target_p);
 242
 243         invalidate_bancache_user(target_p);
 244
 245         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 246                         "Nick change: From %s to %s [%s@%s]",
 247                         target_p->name, parv[2], target_p->username,
 248                         target_p->host);
 249
 250         sendto_common_channels_local(target_p, NOCAPS, NOCAPS, ":%s!%s@%s NICK :%s",
 251                                 target_p->name, target_p->username,
 252                                 target_p->host, parv[2]);
 253
 254         whowas_add_history(target_p, 1);
 255         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 256                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 257
 258         del_from_client_hash(target_p->name, target_p);
 259
 260         /* invalidate nick delay because we're forcing this nick to be used */
 261         nd = rb_dictionary_retrieve(nd_dict, parv[2]);
 262         if (nd != NULL)
 263                 free_nd_entry(nd);
 264
 265         rb_strlcpy(target_p->name, parv[2], NICKLEN);
 266         add_to_client_hash(target_p->name, target_p);
 267
 268         monitor_signon(target_p);
 269
 270         del_all_accepts(target_p);
 271
 272         snprintf(note, sizeof(note), "Nick: %s", target_p->name);
 273         rb_note(target_p->localClient->F, note);
 274 }
 275
 276 /*
 277 ** me_nickdelay
 278 **      parv[1] = duration in seconds (0 to remove)
 279 **      parv[2] = nick
 280 */
 281 static void
 282 me_nickdelay(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 283 {
 284         int duration;
 285         struct nd_entry *nd;
 286
 287         if(!(source_p->flags & FLAGS_SERVICE))
 288         {
 289                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 290                         "Non-service server %s attempting to execute services-only command NICKDELAY", source_p->name);
 291                 return;
 292         }
 293
 294         duration = atoi(parv[1]);
 295         if (duration <= 0)
 296         {
 297                 nd = rb_dictionary_retrieve(nd_dict, parv[2]);
 298                 if (nd != NULL)
 299                         free_nd_entry(nd);
 300         }
 301         else
 302         {
 303                 if (duration > 86400)
 304                         duration = 86400;
 305                 add_nd_entry(parv[2]);
 306                 nd = rb_dictionary_retrieve(nd_dict, parv[2]);
 307                 if (nd != NULL)
 308                         nd->expire = rb_current_time() + duration;
 309         }
 310 }
 311
 312 static void
 313 h_svc_server_introduced(void *data)
 314 {
 315         hook_data_client *hdata = data;
 316         rb_dlink_node *ptr;
 317
 318         RB_DLINK_FOREACH(ptr, service_list.head)
 319         {
 320                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 321                 {
 322                         hdata->target->flags |= FLAGS_SERVICE;
 323                         return;
 324                 }
 325         }
 326 }
 327
 328 static void
 329 h_svc_whois(void *data_)
 330 {
 331         hook_data_client *data = data_;
 332         char *p = data->target->user->suser;
 333         if(!EmptyString(p))
 334         {
 335                 /* Try to strip off any leading digits as this may be used to
 336                  * store both an ID number and an account name in one field.
 337                  * If only digits are present, leave as is.
 338                  */
 339                 while(IsDigit(*p))
 340                         p++;
 341                 if(*p == '\0')
 342                         p = data->target->user->suser;
 343
 344                 sendto_one_numeric(data->client, RPL_WHOISLOGGEDIN,
 345                                 form_str(RPL_WHOISLOGGEDIN),
 346                                 data->target->name, p);
 347         }
 348 }
 349
 350 static void
 351 h_svc_stats(void *data_)
 352 {
 353         hook_data_int *data = data_;
 354         char statchar = (char) data->arg2;
 355         rb_dlink_node *ptr;
 356
 357         if (statchar == 'U' && IsOperGeneral(data->client))
 358         {
 359                 RB_DLINK_FOREACH(ptr, service_list.head)
 360                 {
 361                         sendto_one_numeric(data->client, RPL_STATSULINE,
 362                                                 form_str(RPL_STATSULINE),
 363                                                 (const char *)ptr->data, "*", "*", "s");
 364                 }
 365         }
 366 }
 367
 368 static void
 369 h_svc_conf_read_start(void *dummy)
 370 {
 371         unmark_services();
 372 }
 373
 374 static void
 375 unmark_services(void)
 376 {
 377         struct Client *target_p;
 378         rb_dlink_node *ptr;
 379
 380         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 381         {
 382                 target_p = ptr->data;
 383
 384                 target_p->flags &= ~FLAGS_SERVICE;
 385         }
 386 }
 387
 388 static void
 389 h_svc_conf_read_end(void *dummy)
 390 {
 391         mark_services();
 392 }
 393
 394 static void
 395 mark_services(void)
 396 {
 397         struct Client *target_p;
 398         rb_dlink_node *ptr;
 399
 400         RB_DLINK_FOREACH(ptr, service_list.head)
 401         {
 402                 target_p = find_server(NULL, (const char *)ptr->data);
 403
 404                 if (target_p)
 405                         target_p->flags |= FLAGS_SERVICE;
 406         }
 407 }