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 "common.h"
  36 #include "defaults.h"
  37 #include "ircd.h"
  38 #include "numeric.h"
  39 #include "s_conf.h"
  40 #include "s_newconf.h"
  41 #include "s_serv.h"
  42 #include "hash.h"
  43 #include "msg.h"
  44 #include "parse.h"
  45 #include "modules.h"
  46 #include "whowas.h"
  47 #include "monitor.h"
  48 #include "supported.h"
  49
  50 static const char services_desc[] = "Provides support for running a services daemon";
  51
  52 static int _modinit(void);
  53 static void _moddeinit(void);
  54
  55 static void mark_services(void);
  56 static void unmark_services(void);
  57
  58 static void me_su(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  59 static void me_login(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  60 static void me_rsfnc(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  61 static void me_nickdelay(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  62
  63 static void h_svc_server_introduced(hook_data_client *);
  64 static void h_svc_whois(hook_data_client *);
  65 static void h_svc_stats(hook_data_int *);
  66 static void h_svc_conf_read_start(void *);
  67 static void h_svc_conf_read_end(void *);
  68
  69 struct Message su_msgtab = {
  70         "SU", 0, 0, 0, 0,
  71         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_su, 2}, mg_ignore}
  72 };
  73 struct Message login_msgtab = {
  74         "LOGIN", 0, 0, 0, 0,
  75         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_login, 2}, mg_ignore}
  76 };
  77 struct Message rsfnc_msgtab = {
  78         "RSFNC", 0, 0, 0, 0,
  79         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_rsfnc, 4}, mg_ignore}
  80 };
  81 struct Message nickdelay_msgtab = {
  82         "NICKDELAY", 0, 0, 0, 0,
  83         {mg_unreg, mg_ignore, mg_ignore, mg_ignore, {me_nickdelay, 3}, mg_ignore}
  84 };
  85
  86 mapi_clist_av1 services_clist[] = {
  87         &su_msgtab, &login_msgtab, &rsfnc_msgtab, &nickdelay_msgtab, NULL
  88 };
  89 mapi_hfn_list_av1 services_hfnlist[] = {
  90         { "doing_stats",        (hookfn) h_svc_stats },
  91         { "doing_whois",        (hookfn) h_svc_whois },
  92         { "doing_whois_global", (hookfn) h_svc_whois },
  93         { "server_introduced",  (hookfn) h_svc_server_introduced },
  94         { "conf_read_start", (hookfn) h_svc_conf_read_start },
  95         { "conf_read_end", (hookfn) h_svc_conf_read_end },
  96         { NULL, NULL }
  97 };
  98
  99 DECLARE_MODULE_AV2(services, _modinit, _moddeinit, services_clist, NULL, services_hfnlist, NULL, NULL, services_desc);
 100
 101 static int
 102 _modinit(void)
 103 {
 104         mark_services();
 105         add_isupport("FNC", isupport_string, "");
 106         return 0;
 107 }
 108
 109 static void
 110 _moddeinit(void)
 111 {
 112         delete_isupport("FNC");
 113         unmark_services();
 114 }
 115
 116 static void
 117 me_su(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
 118         int parc, const char *parv[])
 119 {
 120         struct Client *target_p;
 121
 122         if(!(source_p->flags & FLAGS_SERVICE))
 123         {
 124                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 125                         "Non-service server %s attempting to execute services-only command SU", source_p->name);
 126                 return;
 127         }
 128
 129         if((target_p = find_client(parv[1])) == NULL)
 130                 return;
 131
 132         if(!target_p->user)
 133                 return;
 134
 135         if(EmptyString(parv[2]))
 136                 target_p->user->suser[0] = '\0';
 137         else
 138                 rb_strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser));
 139
 140         sendto_common_channels_local_butone(target_p, CLICAP_ACCOUNT_NOTIFY, NOCAPS, ":%s!%s@%s ACCOUNT %s",
 141                                             target_p->name, target_p->username, target_p->host,
 142                                             EmptyString(target_p->user->suser) ? "*" : target_p->user->suser);
 143
 144         invalidate_bancache_user(target_p);
 145 }
 146
 147 static void
 148 me_login(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
 149         int parc, const char *parv[])
 150 {
 151         if(!IsPerson(source_p))
 152                 return;
 153
 154         rb_strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser));
 155 }
 156
 157 static void
 158 me_rsfnc(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
 159         int parc, const char *parv[])
 160 {
 161         struct Client *target_p;
 162         struct Client *exist_p;
 163         time_t newts, curts;
 164         char note[NICKLEN + 10];
 165
 166         if(!(source_p->flags & FLAGS_SERVICE))
 167         {
 168                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 169                         "Non-service server %s attempting to execute services-only command RSFNC", source_p->name);
 170                 return;
 171         }
 172
 173         if((target_p = find_person(parv[1])) == NULL)
 174                 return;
 175
 176         if(!MyClient(target_p))
 177                 return;
 178
 179         if(!clean_nick(parv[2], 0) || IsDigit(parv[2][0]))
 180                 return;
 181
 182         curts = atol(parv[4]);
 183
 184         /* if tsinfo is different from what it was when services issued the
 185          * RSFNC, then we ignore it.  This can happen when a client changes
 186          * nicknames before the RSFNC arrives.. --anfl
 187          */
 188         if(target_p->tsinfo != curts)
 189                 return;
 190
 191         if((exist_p = find_named_client(parv[2])))
 192         {
 193                 char buf[BUFSIZE];
 194
 195                 /* this would be one hell of a race condition to trigger
 196                  * this one given the tsinfo check above, but its here for
 197                  * safety --anfl
 198                  */
 199                 if(target_p == exist_p)
 200                         goto doit;
 201
 202                 if(MyClient(exist_p))
 203                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 204                                 me.name, exist_p->name);
 205
 206                 exist_p->flags |= FLAGS_KILLED;
 207                 /* Do not send kills to servers for unknowns -- jilles */
 208                 if(IsClient(exist_p))
 209                 {
 210                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 211                                                 me.name);
 212                         sendto_realops_snomask(SNO_SKILL, L_ALL,
 213                                         "Nick collision due to services forced nick change on %s",
 214                                         parv[2]);
 215                 }
 216
 217                 snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 218                         me.name);
 219                 exit_client(NULL, exist_p, &me, buf);
 220         }
 221
 222 doit:
 223         newts = atol(parv[3]);
 224
 225         /* timestamp is older than 15mins, ignore it */
 226         if(newts < (rb_current_time() - 900))
 227                 newts = rb_current_time() - 900;
 228
 229         target_p->tsinfo = newts;
 230
 231         monitor_signoff(target_p);
 232
 233         invalidate_bancache_user(target_p);
 234
 235         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 236                         "Nick change: From %s to %s [%s@%s]",
 237                         target_p->name, parv[2], target_p->username,
 238                         target_p->host);
 239
 240         sendto_common_channels_local(target_p, NOCAPS, NOCAPS, ":%s!%s@%s NICK :%s",
 241                                 target_p->name, target_p->username,
 242                                 target_p->host, parv[2]);
 243
 244         whowas_add_history(target_p, 1);
 245         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 246                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 247
 248         del_from_client_hash(target_p->name, target_p);
 249         rb_strlcpy(target_p->name, parv[2], NICKLEN);
 250         add_to_client_hash(target_p->name, target_p);
 251
 252         monitor_signon(target_p);
 253
 254         del_all_accepts(target_p);
 255
 256         snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name);
 257         rb_note(target_p->localClient->F, note);
 258 }
 259
 260 /*
 261 ** me_nickdelay
 262 **      parv[1] = duration in seconds (0 to remove)
 263 **      parv[2] = nick
 264 */
 265 static void
 266 me_nickdelay(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 267 {
 268         int duration;
 269         struct nd_entry *nd;
 270
 271         if(!(source_p->flags & FLAGS_SERVICE))
 272         {
 273                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 274                         "Non-service server %s attempting to execute services-only command NICKDELAY", source_p->name);
 275                 return;
 276         }
 277
 278         duration = atoi(parv[1]);
 279         if (duration <= 0)
 280         {
 281                 nd = rb_dictionary_retrieve(nd_dict, parv[2]);
 282                 if (nd != NULL)
 283                         free_nd_entry(nd);
 284         }
 285         else
 286         {
 287                 if (duration > 86400)
 288                         duration = 86400;
 289                 add_nd_entry(parv[2]);
 290                 nd = rb_dictionary_retrieve(nd_dict, parv[2]);
 291                 if (nd != NULL)
 292                         nd->expire = rb_current_time() + duration;
 293         }
 294 }
 295
 296 static void
 297 h_svc_server_introduced(hook_data_client *hdata)
 298 {
 299         rb_dlink_node *ptr;
 300
 301         RB_DLINK_FOREACH(ptr, service_list.head)
 302         {
 303                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 304                 {
 305                         hdata->target->flags |= FLAGS_SERVICE;
 306                         return;
 307                 }
 308         }
 309 }
 310
 311 static void
 312 h_svc_whois(hook_data_client *data)
 313 {
 314         char *p = data->target->user->suser;
 315         if(!EmptyString(p))
 316         {
 317                 /* Try to strip off any leading digits as this may be used to
 318                  * store both an ID number and an account name in one field.
 319                  * If only digits are present, leave as is.
 320                  */
 321                 while(IsDigit(*p))
 322                         p++;
 323                 if(*p == '\0')
 324                         p = data->target->user->suser;
 325
 326                 sendto_one_numeric(data->client, RPL_WHOISLOGGEDIN,
 327                                 form_str(RPL_WHOISLOGGEDIN),
 328                                 data->target->name, p);
 329         }
 330 }
 331
 332 static void
 333 h_svc_stats(hook_data_int *data)
 334 {
 335         char statchar = (char) data->arg2;
 336         rb_dlink_node *ptr;
 337
 338         if (statchar == 'U' && IsOper(data->client))
 339         {
 340                 RB_DLINK_FOREACH(ptr, service_list.head)
 341                 {
 342                         sendto_one_numeric(data->client, RPL_STATSULINE,
 343                                                 form_str(RPL_STATSULINE),
 344                                                 (const char *)ptr->data, "*", "*", "s");
 345                 }
 346         }
 347 }
 348
 349 static void
 350 h_svc_conf_read_start(void *dummy)
 351 {
 352         unmark_services();
 353 }
 354
 355 static void
 356 unmark_services(void)
 357 {
 358         struct Client *target_p;
 359         rb_dlink_node *ptr;
 360
 361         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 362         {
 363                 target_p = ptr->data;
 364
 365                 target_p->flags &= ~FLAGS_SERVICE;
 366         }
 367 }
 368
 369 static void
 370 h_svc_conf_read_end(void *dummy)
 371 {
 372         mark_services();
 373 }
 374
 375 static void
 376 mark_services(void)
 377 {
 378         struct Client *target_p;
 379         rb_dlink_node *ptr;
 380
 381         RB_DLINK_FOREACH(ptr, service_list.head)
 382         {
 383                 target_p = find_server(NULL, (const char *)ptr->data);
 384
 385                 if (target_p)
 386                         target_p->flags |= FLAGS_SERVICE;
 387         }
 388 }