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 me_su(struct Client *, struct Client *, int, const char **);
  52 static int me_login(struct Client *, struct Client *, int, const char **);
  53 static int me_rsfnc(struct Client *, struct Client *, int, const char **);
  54 static int me_nickdelay(struct Client *, struct Client *, int, const char **);
  55
  56 static void h_svc_server_introduced(hook_data_client *);
  57 static void h_svc_whois(hook_data_client *);
  58 static void h_svc_stats(hook_data_int *);
  59
  60 struct Message su_msgtab = {
  61         "SU", 0, 0, 0, MFLG_SLOW,
  62         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_su, 2}, mg_ignore}
  63 };
  64 struct Message login_msgtab = {
  65         "LOGIN", 0, 0, 0, MFLG_SLOW,
  66         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_login, 2}, mg_ignore}
  67 };
  68 struct Message rsfnc_msgtab = {
  69         "RSFNC", 0, 0, 0, MFLG_SLOW,
  70         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_rsfnc, 4}, mg_ignore}
  71 };
  72 struct Message nickdelay_msgtab = {
  73         "NICKDELAY", 0, 0, 0, MFLG_SLOW,
  74         {mg_unreg, mg_ignore, mg_ignore, mg_ignore, {me_nickdelay, 3}, mg_ignore}
  75 };
  76
  77 mapi_clist_av1 services_clist[] = {
  78         &su_msgtab, &login_msgtab, &rsfnc_msgtab, &nickdelay_msgtab, NULL
  79 };
  80 mapi_hfn_list_av1 services_hfnlist[] = {
  81         { "doing_stats",        (hookfn) h_svc_stats },
  82         { "doing_whois",        (hookfn) h_svc_whois },
  83         { "doing_whois_global", (hookfn) h_svc_whois },
  84         { "server_introduced",  (hookfn) h_svc_server_introduced },
  85         { NULL, NULL }
  86 };
  87
  88 DECLARE_MODULE_AV1(services, NULL, NULL, services_clist, NULL, services_hfnlist, "$Revision: 1907 $");
  89
  90 static int
  91 me_su(struct Client *client_p, struct Client *source_p,
  92         int parc, const char *parv[])
  93 {
  94         struct Client *target_p;
  95
  96         if(!(source_p->flags & FLAGS_SERVICE))
  97                 return 0;
  98
  99         if((target_p = find_client(parv[1])) == NULL)
 100                 return 0;
 101
 102         if(!target_p->user)
 103                 return 0;
 104
 105         if(EmptyString(parv[2]))
 106                 target_p->user->suser[0] = '\0';
 107         else
 108                 rb_strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser));
 109
 110         sendto_common_channels_local_butone(target_p, CLICAP_ACCOUNT_NOTIFY, ":%s!%s@%s ACCOUNT %s",
 111                                             target_p->name, target_p->username, target_p->host,
 112                                             EmptyString(target_p->user->suser) ? "*" : target_p->user->suser);
 113
 114         invalidate_bancache_user(target_p);
 115
 116         return 0;
 117 }
 118
 119 static int
 120 me_login(struct Client *client_p, struct Client *source_p,
 121         int parc, const char *parv[])
 122 {
 123         if(!IsPerson(source_p))
 124                 return 0;
 125
 126         rb_strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser));
 127         return 0;
 128 }
 129
 130 static int
 131 clean_nick(const char *nick)
 132 {
 133         int len = 0;
 134
 135         if(EmptyString(nick) || *nick == '-' || IsDigit(*nick))
 136                 return 0;
 137
 138         for(; *nick; nick++)
 139         {
 140                 len++;
 141                 if(!IsNickChar(*nick))
 142                         return 0;
 143         }
 144
 145         if(len >= NICKLEN)
 146                 return 0;
 147
 148         return 1;
 149 }
 150
 151 static int
 152 me_rsfnc(struct Client *client_p, struct Client *source_p,
 153         int parc, const char *parv[])
 154 {
 155         struct Client *target_p;
 156         struct Client *exist_p;
 157         time_t newts, curts;
 158         char note[NICKLEN + 10];
 159
 160         if(!(source_p->flags & FLAGS_SERVICE))
 161                 return 0;
 162
 163         if((target_p = find_person(parv[1])) == NULL)
 164                 return 0;
 165
 166         if(!MyClient(target_p))
 167                 return 0;
 168
 169         if(!clean_nick(parv[2]))
 170                 return 0;
 171
 172         curts = atol(parv[4]);
 173
 174         /* if tsinfo is different from what it was when services issued the
 175          * RSFNC, then we ignore it.  This can happen when a client changes
 176          * nicknames before the RSFNC arrives.. --anfl
 177          */
 178         if(target_p->tsinfo != curts)
 179                 return 0;
 180
 181         if((exist_p = find_named_client(parv[2])))
 182         {
 183                 char buf[BUFSIZE];
 184
 185                 /* this would be one hell of a race condition to trigger
 186                  * this one given the tsinfo check above, but its here for
 187                  * safety --anfl
 188                  */
 189                 if(target_p == exist_p)
 190                         goto doit;
 191
 192                 if(MyClient(exist_p))
 193                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 194                                 me.name, exist_p->name);
 195
 196                 exist_p->flags |= FLAGS_KILLED;
 197                 /* Do not send kills to servers for unknowns -- jilles */
 198                 if(IsClient(exist_p))
 199                 {
 200                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 201                                                 me.name);
 202                         sendto_realops_snomask(SNO_SKILL, L_ALL,
 203                                         "Nick collision due to services forced nick change on %s",
 204                                         parv[2]);
 205                 }
 206
 207                 rb_snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 208                         me.name);
 209                 exit_client(NULL, exist_p, &me, buf);
 210         }
 211
 212 doit:
 213         newts = atol(parv[3]);
 214
 215         /* timestamp is older than 15mins, ignore it */
 216         if(newts < (rb_current_time() - 900))
 217                 newts = rb_current_time() - 900;
 218
 219         target_p->tsinfo = newts;
 220
 221         monitor_signoff(target_p);
 222
 223         invalidate_bancache_user(target_p);
 224
 225         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 226                         "Nick change: From %s to %s [%s@%s]",
 227                         target_p->name, parv[2], target_p->username,
 228                         target_p->host);
 229
 230         sendto_common_channels_local(target_p, NOCAPS, ":%s!%s@%s NICK :%s",
 231                                 target_p->name, target_p->username,
 232                                 target_p->host, parv[2]);
 233
 234         add_history(target_p, 1);
 235         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 236                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 237
 238         del_from_client_hash(target_p->name, target_p);
 239         rb_strlcpy(target_p->name, parv[2], NICKLEN);
 240         add_to_client_hash(target_p->name, target_p);
 241
 242         monitor_signon(target_p);
 243
 244         del_all_accepts(target_p);
 245
 246         rb_snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name);
 247         rb_note(target_p->localClient->F, note);
 248         return 0;
 249 }
 250
 251 /*
 252 ** me_nickdelay
 253 **      parv[1] = duration in seconds (0 to remove)
 254 **      parv[2] = nick
 255 */
 256 static int
 257 me_nickdelay(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 258 {
 259         int duration;
 260         struct nd_entry *nd;
 261
 262         if(!(source_p->flags & FLAGS_SERVICE))
 263                 return 0;
 264
 265         duration = atoi(parv[1]);
 266         if (duration <= 0)
 267         {
 268                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 269                 if (nd != NULL)
 270                         free_nd_entry(nd);
 271         }
 272         else
 273         {
 274                 if (duration > 86400)
 275                         duration = 86400;
 276                 add_nd_entry(parv[2]);
 277                 nd = irc_dictionary_retrieve(nd_dict, parv[2]);
 278                 if (nd != NULL)
 279                         nd->expire = rb_current_time() + duration;
 280         }
 281
 282         return 0;
 283 }
 284
 285 static void
 286 h_svc_server_introduced(hook_data_client *hdata)
 287 {
 288         rb_dlink_node *ptr;
 289
 290         RB_DLINK_FOREACH(ptr, service_list.head)
 291         {
 292                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 293                 {
 294                         hdata->target->flags |= FLAGS_SERVICE;
 295                         return;
 296                 }
 297         }
 298 }
 299
 300 static void
 301 h_svc_whois(hook_data_client *data)
 302 {
 303         char *p = data->target->user->suser;
 304         if(!EmptyString(p))
 305         {
 306                 /* Try to strip off any leading digits as this may be used to
 307                  * store both an ID number and an account name in one field.
 308                  * If only digits are present, leave as is.
 309                  */
 310                 while(IsDigit(*p))
 311                         p++;
 312                 if(*p == '\0')
 313                         p = data->target->user->suser;
 314
 315                 sendto_one_numeric(data->client, RPL_WHOISLOGGEDIN,
 316                                 form_str(RPL_WHOISLOGGEDIN),
 317                                 data->target->name, p);
 318         }
 319 }
 320
 321 static void
 322 h_svc_stats(hook_data_int *data)
 323 {
 324         char statchar = (char) data->arg2;
 325         rb_dlink_node *ptr;
 326
 327         if (statchar == 'U' && IsOper(data->client))
 328         {
 329                 RB_DLINK_FOREACH(ptr, service_list.head)
 330                 {
 331                         sendto_one_numeric(data->client, RPL_STATSULINE,
 332                                                 form_str(RPL_STATSULINE),
 333                                                 (const char *)ptr->data, "*", "*", "s");
 334                 }
 335         }
 336 }