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 "tools.h"
  35 #include "send.h"
  36 #include "channel.h"
  37 #include "client.h"
  38 #include "common.h"
  39 #include "config.h"
  40 #include "ircd.h"
  41 #include "numeric.h"
  42 #include "memory.h"
  43 #include "s_conf.h"
  44 #include "s_newconf.h"
  45 #include "s_serv.h"
  46 #include "hash.h"
  47 #include "msg.h"
  48 #include "parse.h"
  49 #include "modules.h"
  50 #include "sprintf_irc.h"
  51 #include "whowas.h"
  52 #include "monitor.h"
  53
  54 static int me_su(struct Client *, struct Client *, int, const char **);
  55 static int me_login(struct Client *, struct Client *, int, const char **);
  56 static int me_rsfnc(struct Client *, struct Client *, int, const char **);
  57 static int me_nickdelay(struct Client *, struct Client *, int, const char **);
  58
  59 static void h_svc_server_introduced(hook_data_client *);
  60 static void h_svc_whois(hook_data_client *);
  61 static void h_svc_stats(hook_data_int *);
  62
  63 struct Message su_msgtab = {
  64         "SU", 0, 0, 0, MFLG_SLOW,
  65         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_su, 2}, mg_ignore}
  66 };
  67 struct Message login_msgtab = {
  68         "LOGIN", 0, 0, 0, MFLG_SLOW,
  69         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_login, 2}, mg_ignore}
  70 };
  71 struct Message rsfnc_msgtab = {
  72         "RSFNC", 0, 0, 0, MFLG_SLOW,
  73         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_rsfnc, 4}, mg_ignore}
  74 };
  75 struct Message nickdelay_msgtab = {
  76         "NICKDELAY", 0, 0, 0, MFLG_SLOW,
  77         {mg_unreg, mg_ignore, mg_ignore, mg_ignore, {me_nickdelay, 3}, mg_ignore}
  78 };
  79
  80 mapi_clist_av1 services_clist[] = {
  81         &su_msgtab, &login_msgtab, &rsfnc_msgtab, &nickdelay_msgtab, NULL
  82 };
  83 mapi_hfn_list_av1 services_hfnlist[] = {
  84         { "doing_stats",        (hookfn) h_svc_stats },
  85         { "doing_whois",        (hookfn) h_svc_whois },
  86         { "doing_whois_global", (hookfn) h_svc_whois },
  87         { "server_introduced",  (hookfn) h_svc_server_introduced },
  88         { NULL, NULL }
  89 };
  90
  91 DECLARE_MODULE_AV1(services, NULL, NULL, services_clist, NULL, services_hfnlist, "$Revision: 1907 $");
  92
  93 static int
  94 me_su(struct Client *client_p, struct Client *source_p,
  95         int parc, const char *parv[])
  96 {
  97         struct Client *target_p;
  98
  99         if(!(source_p->flags & FLAGS_SERVICE))
 100                 return 0;
 101
 102         if((target_p = find_client(parv[1])) == NULL)
 103                 return 0;
 104
 105         if(!target_p->user)
 106                 return 0;
 107
 108         if(EmptyString(parv[2]))
 109                 target_p->user->suser[0] = '\0';
 110         else
 111                 strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser));
 112
 113         invalidate_bancache_user(target_p);
 114
 115         return 0;
 116 }
 117
 118 static int
 119 me_login(struct Client *client_p, struct Client *source_p,
 120         int parc, const char *parv[])
 121 {
 122         if(!IsPerson(source_p))
 123                 return 0;
 124
 125         strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser));
 126         return 0;
 127 }
 128
 129 static int
 130 clean_nick(const char *nick)
 131 {
 132         int len = 0;
 133
 134         if(EmptyString(nick) || *nick == '-' || IsDigit(*nick))
 135                 return 0;
 136
 137         for(; *nick; nick++)
 138         {
 139                 len++;
 140                 if(!IsNickChar(*nick))
 141                         return 0;
 142         }
 143
 144         if(len >= NICKLEN)
 145                 return 0;
 146
 147         return 1;
 148 }
 149
 150 static int
 151 me_rsfnc(struct Client *client_p, struct Client *source_p,
 152         int parc, const char *parv[])
 153 {
 154         struct Client *target_p;
 155         struct Client *exist_p;
 156         time_t newts, curts;
 157         char note[NICKLEN + 10];
 158
 159         if(!(source_p->flags & FLAGS_SERVICE))
 160                 return 0;
 161
 162         if((target_p = find_person(parv[1])) == NULL)
 163                 return 0;
 164
 165         if(!MyClient(target_p))
 166                 return 0;
 167
 168         if(!clean_nick(parv[2]))
 169                 return 0;
 170
 171         curts = atol(parv[4]);
 172
 173         /* if tsinfo is different from what it was when services issued the
 174          * RSFNC, then we ignore it.  This can happen when a client changes
 175          * nicknames before the RSFNC arrives.. --anfl
 176          */
 177         if(target_p->tsinfo != curts)
 178                 return 0;
 179
 180         if((exist_p = find_named_client(parv[2])))
 181         {
 182                 char buf[BUFSIZE];
 183
 184                 /* this would be one hell of a race condition to trigger
 185                  * this one given the tsinfo check above, but its here for
 186                  * safety --anfl
 187                  */
 188                 if(target_p == exist_p)
 189                         return 0;
 190
 191                 if(MyClient(exist_p))
 192                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 193                                 me.name, exist_p->name);
 194
 195                 exist_p->flags |= FLAGS_KILLED;
 196                 /* Do not send kills to servers for unknowns -- jilles */
 197                 if(IsClient(exist_p))
 198                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 199                                                 me.name);
 200
 201                 snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 202                         me.name);
 203                 exit_client(NULL, exist_p, &me, buf);
 204         }
 205
 206         newts = atol(parv[3]);
 207
 208         /* timestamp is older than 15mins, ignore it */
 209         if(newts < (CurrentTime - 900))
 210                 newts = CurrentTime - 900;
 211
 212         target_p->tsinfo = newts;
 213
 214         monitor_signoff(target_p);
 215
 216         invalidate_bancache_user(target_p);
 217
 218         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 219                         "Nick change: From %s to %s [%s@%s]",
 220                         target_p->name, parv[2], target_p->username,
 221                         target_p->host);
 222
 223         sendto_common_channels_local(target_p, ":%s!%s@%s NICK :%s",
 224                                 target_p->name, target_p->username,
 225                                 target_p->host, parv[2]);
 226
 227         add_history(target_p, 1);
 228         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 229                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 230         sendto_server(NULL, NULL, NOCAPS, CAP_TS6, ":%s NICK %s :%ld",
 231                         target_p->name, parv[2], (long) target_p->tsinfo);
 232
 233         del_from_client_hash(target_p->name, target_p);
 234         strcpy(target_p->name, parv[2]);
 235         add_to_client_hash(target_p->name, target_p);
 236
 237         monitor_signon(target_p);
 238
 239         del_all_accepts(target_p);
 240
 241         rb_snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name);
 242         rb_note(target_p->localClient->F, note);
 243         return 0;
 244 }
 245
 246 /*
 247 ** me_nickdelay
 248 **      parv[0] = sender prefix
 249 **      parv[1] = duration in seconds (0 to remove)
 250 **      parv[2] = nick
 251 */
 252 static int
 253 me_nickdelay(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 254 {
 255         int duration;
 256         struct nd_entry *nd;
 257
 258         if(!(source_p->flags & FLAGS_SERVICE))
 259                 return 0;
 260
 261         duration = atoi(parv[1]);
 262         if (duration <= 0)
 263         {
 264                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 265                 if (nd != NULL)
 266                         free_nd_entry(nd);
 267         }
 268         else
 269         {
 270                 if (duration > 86400)
 271                         duration = 86400;
 272                 add_nd_entry(parv[2]);
 273                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 274                 if (nd != NULL)
 275                         nd->expire = CurrentTime + duration;
 276         }
 277
 278         return 0;
 279 }
 280
 281 static void
 282 h_svc_server_introduced(hook_data_client *hdata)
 283 {
 284         rb_dlink_node *ptr;
 285
 286         RB_DLINK_FOREACH(ptr, service_list.head)
 287         {
 288                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 289                 {
 290                         hdata->target->flags |= FLAGS_SERVICE;
 291                         return;
 292                 }
 293         }
 294 }
 295
 296 static void
 297 h_svc_whois(hook_data_client *data)
 298 {
 299         char *p = data->target->user->suser;
 300         if(!EmptyString(p))
 301         {
 302                 /* Try to strip off any leading digits as this may be used to
 303                  * store both an ID number and an account name in one field.
 304                  * If only digits are present, leave as is.
 305                  */
 306                 while(IsDigit(*p))
 307                         p++;
 308                 if(*p == '\0')
 309                         p = data->target->user->suser;
 310
 311                 sendto_one(data->client, form_str(RPL_WHOISLOGGEDIN),
 312                                 get_id(&me, data->client),
 313                                 get_id(data->client, data->client),
 314                                 data->target->name, p);
 315         }
 316 }
 317
 318 static void
 319 h_svc_stats(hook_data_int *data)
 320 {
 321         char statchar = (char) data->arg2;
 322         rb_dlink_node *ptr;
 323
 324         if (statchar == 'U' && IsOper(data->client))
 325         {
 326                 RB_DLINK_FOREACH(ptr, service_list.head)
 327                 {
 328                         sendto_one_numeric(data->client, RPL_STATSULINE,
 329                                                 form_str(RPL_STATSULINE),
 330                                                 ptr->data, "*", "*", "s");
 331                 }
 332         }
 333 }