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