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
 158         if(!(source_p->flags & FLAGS_SERVICE))
 159                 return 0;
 160
 161         if((target_p = find_person(parv[1])) == NULL)
 162                 return 0;
 163
 164         if(!MyClient(target_p))
 165                 return 0;
 166
 167         if(!clean_nick(parv[2]))
 168                 return 0;
 169
 170         curts = atol(parv[4]);
 171
 172         /* if tsinfo is different from what it was when services issued the
 173          * RSFNC, then we ignore it.  This can happen when a client changes
 174          * nicknames before the RSFNC arrives.. --anfl
 175          */
 176         if(target_p->tsinfo != curts)
 177                 return 0;
 178
 179         if((exist_p = find_named_client(parv[2])))
 180         {
 181                 char buf[BUFSIZE];
 182
 183                 /* this would be one hell of a race condition to trigger
 184                  * this one given the tsinfo check above, but its here for
 185                  * safety --anfl
 186                  */
 187                 if(target_p == exist_p)
 188                         return 0;
 189
 190                 if(MyClient(exist_p))
 191                         sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
 192                                 me.name, exist_p->name);
 193
 194                 exist_p->flags |= FLAGS_KILLED;
 195                 /* Do not send kills to servers for unknowns -- jilles */
 196                 if(IsClient(exist_p))
 197                         kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
 198                                                 me.name);
 199
 200                 snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
 201                         me.name);
 202                 exit_client(NULL, exist_p, &me, buf);
 203         }
 204
 205         newts = atol(parv[3]);
 206
 207         /* timestamp is older than 15mins, ignore it */
 208         if(newts < (CurrentTime - 900))
 209                 newts = CurrentTime - 900;
 210
 211         target_p->tsinfo = newts;
 212
 213         monitor_signoff(target_p);
 214
 215         invalidate_bancache_user(target_p);
 216
 217         sendto_realops_snomask(SNO_NCHANGE, L_ALL,
 218                         "Nick change: From %s to %s [%s@%s]",
 219                         target_p->name, parv[2], target_p->username,
 220                         target_p->host);
 221
 222         sendto_common_channels_local(target_p, ":%s!%s@%s NICK :%s",
 223                                 target_p->name, target_p->username,
 224                                 target_p->host, parv[2]);
 225
 226         add_history(target_p, 1);
 227         sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 228                         use_id(target_p), parv[2], (long) target_p->tsinfo);
 229         sendto_server(NULL, NULL, NOCAPS, CAP_TS6, ":%s NICK %s :%ld",
 230                         target_p->name, parv[2], (long) target_p->tsinfo);
 231
 232         del_from_client_hash(target_p->name, target_p);
 233         strcpy(target_p->name, parv[2]);
 234         add_to_client_hash(target_p->name, target_p);
 235
 236         monitor_signon(target_p);
 237
 238         del_all_accepts(target_p);
 239
 240         comm_note(target_p->localClient->fd, "Nick: %s", target_p->name);
 241         return 0;
 242 }
 243
 244 /*
 245 ** me_nickdelay
 246 **      parv[0] = sender prefix
 247 **      parv[1] = duration in seconds (0 to remove)
 248 **      parv[2] = nick
 249 */
 250 static int
 251 me_nickdelay(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 252 {
 253         int duration;
 254         struct nd_entry *nd;
 255
 256         if(!(source_p->flags & FLAGS_SERVICE))
 257                 return 0;
 258
 259         duration = atoi(parv[1]);
 260         if (duration <= 0)
 261         {
 262                 nd = hash_find_nd(parv[2]);
 263                 if (nd != NULL)
 264                         free_nd_entry(nd);
 265         }
 266         else
 267         {
 268                 if (duration > 86400)
 269                         duration = 86400;
 270                 add_nd_entry(parv[2]);
 271                 nd = hash_find_nd(parv[2]);
 272                 if (nd != NULL)
 273                         nd->expire = CurrentTime + duration;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static void
 280 h_svc_server_introduced(hook_data_client *hdata)
 281 {
 282         dlink_node *ptr;
 283
 284         DLINK_FOREACH(ptr, service_list.head)
 285         {
 286                 if(!irccmp((const char *) ptr->data, hdata->target->name))
 287                 {
 288                         hdata->target->flags |= FLAGS_SERVICE;
 289                         return;
 290                 }
 291         }
 292 }
 293
 294 static void
 295 h_svc_whois(hook_data_client *data)
 296 {
 297         char *p = data->target->user->suser;
 298         if(!EmptyString(p))
 299         {
 300                 /* Try to strip off any leading digits as this may be used to
 301                  * store both an ID number and an account name in one field.
 302                  * If only digits are present, leave as is.
 303                  */
 304                 while(IsDigit(*p))
 305                         p++;
 306                 if(*p == '\0')
 307                         p = data->target->user->suser;
 308
 309                 sendto_one(data->client, form_str(RPL_WHOISLOGGEDIN),
 310                                 get_id(&me, data->client),
 311                                 get_id(data->client, data->client),
 312                                 data->target->name, p);
 313         }
 314 }
 315
 316 static void
 317 h_svc_stats(hook_data_int *data)
 318 {
 319         char statchar = (char) data->arg2;
 320         dlink_node *ptr;
 321
 322         if (statchar == 'U' && IsOper(data->client))
 323         {
 324                 DLINK_FOREACH(ptr, service_list.head)
 325                 {
 326                         sendto_one_numeric(data->client, RPL_STATSULINE,
 327                                                 form_str(RPL_STATSULINE),
 328                                                 ptr->data, "*", "*", "s");
 329                 }
 330         }
 331 }