ircd/client.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/client.c
   3  * Copyright (C) 1990 Darren Reed
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 1, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /** @file
  20  * @brief Implementation of functions for handling local clients.
  21  * @version $Id: client.c,v 1.31.2.1 2005/10/12 23:50:04 entrope Exp $
  22  */
  23 #include "config.h"
  24
  25 #include "client.h"
  26 #include "class.h"
  27 #include "ircd.h"
  28 #include "ircd_features.h"
  29 #include "ircd_log.h"
  30 #include "ircd_reply.h"
  31 #include "list.h"
  32 #include "msgq.h"
  33 #include "numeric.h"
  34 #include "s_conf.h"
  35 #include "s_debug.h"
  36 #include "send.h"
  37 #include "struct.h"
  38
  39 /* #include <assert.h> -- Now using assert in ircd_log.h */
  40 #include <string.h>
  41
  42 /** Find the shortest non-zero ping time attached to a client.
  43  * If all attached ping times are zero, return the value for
  44  * FEAT_PINGFREQUENCY.
  45  * @param[in] acptr Client to find ping time for.
  46  * @return Ping time in seconds.
  47  */
  48 int client_get_ping(const struct Client* acptr)
  49 {
  50   int     ping = 0;
  51   struct ConfItem* aconf;
  52   struct SLink*    link;
  53
  54   assert(cli_verify(acptr));
  55
  56   for (link = cli_confs(acptr); link; link = link->next) {
  57     aconf = link->value.aconf;
  58     if (aconf->status & (CONF_CLIENT | CONF_SERVER)) {
  59       int tmp = get_conf_ping(aconf);
  60       if (0 < tmp && (ping > tmp || !ping))
  61         ping = tmp;
  62     }
  63   }
  64   if (0 == ping)
  65     ping = feature_int(FEAT_PINGFREQUENCY);
  66
  67   Debug((DEBUG_DEBUG, "Client %s Ping %d", cli_name(acptr), ping));
  68
  69   return ping;
  70 }
  71
  72 /** Find the default usermode for a client.
  73  * @param[in] sptr Client to find default usermode for.
  74  * @return Pointer to usermode string (or NULL, if there is no default).
  75  */
  76 const char* client_get_default_umode(const struct Client* sptr)
  77 {
  78   struct ConfItem* aconf;
  79   struct SLink* link;
  80
  81   assert(cli_verify(sptr));
  82
  83   for (link = cli_confs(sptr); link; link = link->next) {
  84     aconf = link->value.aconf;
  85     if ((aconf->status & CONF_CLIENT) && ConfUmode(aconf))
  86       return ConfUmode(aconf);
  87   }
  88   return NULL;
  89 }
  90
  91 /** Remove a connection from the list of connections with queued data.
  92  * @param[in] con Connection with no queued data.
  93  */
  94 void client_drop_sendq(struct Connection* con)
  95 {
  96   if (con_prev_p(con)) { /* on the queued data list... */
  97     if (con_next(con))
  98       con_prev_p(con_next(con)) = con_prev_p(con);
  99     *(con_prev_p(con)) = con_next(con);
 100
 101     con_next(con) = 0;
 102     con_prev_p(con) = 0;
 103   }
 104 }
 105
 106 /** Add a connection to the list of connections with queued data.
 107  * @param[in] con Connection with queued data.
 108  * @param[in,out] con_p Previous pointer to next connection.
 109  */
 110 void client_add_sendq(struct Connection* con, struct Connection** con_p)
 111 {
 112   if (!con_prev_p(con)) { /* not on the queued data list yet... */
 113     con_prev_p(con) = con_p;
 114     con_next(con) = *con_p;
 115
 116     if (*con_p)
 117       con_prev_p(*con_p) = &(con_next(con));
 118     *con_p = con;
 119   }
 120 }
 121
 122 /** Default privilege set for global operators. */
 123 static struct Privs privs_global;
 124 /** Default privilege set for local operators. */
 125 static struct Privs privs_local;
 126 /** Non-zero if #privs_global and #privs_local have been initialized. */
 127 static int privs_defaults_set;
 128
 129 /* client_set_privs(struct Client* client)
 130  *
 131  * Sets the privileges for opers.
 132  */
 133 /** Set the privileges for a client.
 134  * @param[in] client Client who has become an operator.
 135  * @param[in] oper Configuration item describing oper's privileges.
 136  */
 137 void
 138 client_set_privs(struct Client *client, struct ConfItem *oper)
 139 {
 140   struct Privs *source, *defaults;
 141   enum Priv priv;
 142
 143   if (!MyConnect(client))
 144     return;
 145
 146   /* Clear out client's privileges. */
 147   memset(cli_privs(client), 0, sizeof(struct Privs));
 148
 149   if (!IsAnOper(client) || !oper)
 150       return;
 151
 152   if (!privs_defaults_set)
 153   {
 154     memset(&privs_global, -1, sizeof(privs_global));
 155     FlagClr(&privs_global, PRIV_WALK_LCHAN);
 156     FlagClr(&privs_global, PRIV_UNLIMIT_QUERY);
 157     FlagClr(&privs_global, PRIV_SET);
 158     FlagClr(&privs_global, PRIV_BADCHAN);
 159     FlagClr(&privs_global, PRIV_LOCAL_BADCHAN);
 160     FlagClr(&privs_global, PRIV_APASS_OPMODE);
 161
 162     memset(&privs_local, 0, sizeof(privs_local));
 163     FlagSet(&privs_local, PRIV_CHAN_LIMIT);
 164     FlagSet(&privs_local, PRIV_MODE_LCHAN);
 165     FlagSet(&privs_local, PRIV_SHOW_INVIS);
 166     FlagSet(&privs_local, PRIV_SHOW_ALL_INVIS);
 167     FlagSet(&privs_local, PRIV_LOCAL_KILL);
 168     FlagSet(&privs_local, PRIV_REHASH);
 169     FlagSet(&privs_local, PRIV_LOCAL_GLINE);
 170     FlagSet(&privs_local, PRIV_LOCAL_JUPE);
 171     FlagSet(&privs_local, PRIV_LOCAL_OPMODE);
 172     FlagSet(&privs_local, PRIV_WHOX);
 173     FlagSet(&privs_local, PRIV_DISPLAY);
 174     FlagSet(&privs_local, PRIV_FORCE_LOCAL_OPMODE);
 175
 176     privs_defaults_set = 1;
 177   }
 178
 179   /* Decide whether to use global or local oper defaults. */
 180   if (FlagHas(&oper->privs_dirty, PRIV_PROPAGATE))
 181     defaults = FlagHas(&oper->privs, PRIV_PROPAGATE) ? &privs_global : &privs_local;
 182   else if (FlagHas(&oper->conn_class->privs_dirty, PRIV_PROPAGATE))
 183     defaults = FlagHas(&oper->conn_class->privs, PRIV_PROPAGATE) ? &privs_global : &privs_local;
 184   else {
 185     assert(0 && "Oper has no propagation and neither does connection class");
 186     return;
 187   }
 188
 189   /* For each feature, figure out whether it comes from the operator
 190    * conf, the connection class conf, or the defaults, then apply it.
 191    */
 192   for (priv = 0; priv < PRIV_LAST_PRIV; ++priv)
 193   {
 194     /* Figure out most applicable definition for the privilege. */
 195     if (FlagHas(&oper->privs_dirty, priv))
 196       source = &oper->privs;
 197     else if (FlagHas(&oper->conn_class->privs_dirty, priv))
 198       source = &oper->conn_class->privs;
 199     else
 200       source = defaults;
 201
 202     /* Set it if necessary (privileges were already cleared). */
 203     if (FlagHas(source, priv))
 204       SetPriv(client, priv);
 205   }
 206
 207   /* This should be handled in the config, but lets be sure... */
 208   if (HasPriv(client, PRIV_PROPAGATE))
 209   {
 210     /* force propagating opers to display */
 211     SetPriv(client, PRIV_DISPLAY);
 212   }
 213   else
 214   {
 215     /* if they don't propagate oper status, prevent desyncs */
 216     ClrPriv(client, PRIV_KILL);
 217     ClrPriv(client, PRIV_GLINE);
 218     ClrPriv(client, PRIV_JUPE);
 219     ClrPriv(client, PRIV_OPMODE);
 220     ClrPriv(client, PRIV_BADCHAN);
 221   }
 222 }
 223
 224 /** Array mapping privilege values to names and vice versa. */
 225 static struct {
 226   char        *name; /**< Name of privilege. */
 227   unsigned int priv; /**< Enumeration value of privilege */
 228 } privtab[] = {
 229 /** Helper macro to define an array entry for a privilege. */
 230 #define P(priv)         { #priv, PRIV_ ## priv }
 231   P(CHAN_LIMIT),     P(MODE_LCHAN),     P(WALK_LCHAN),    P(DEOP_LCHAN),
 232   P(SHOW_INVIS),     P(SHOW_ALL_INVIS), P(UNLIMIT_QUERY), P(KILL),
 233   P(LOCAL_KILL),     P(REHASH),         P(RESTART),       P(DIE),
 234   P(GLINE),          P(LOCAL_GLINE),    P(JUPE),          P(LOCAL_JUPE),
 235   P(OPMODE),         P(LOCAL_OPMODE),   P(SET),           P(WHOX),
 236   P(BADCHAN),        P(LOCAL_BADCHAN),  P(SEE_CHAN),      P(PROPAGATE),
 237   P(DISPLAY),        P(SEE_OPERS),      P(WIDE_GLINE),    P(LIST_CHAN),
 238   P(FORCE_OPMODE),   P(FORCE_LOCAL_OPMODE), P(APASS_OPMODE),
 239 #undef P
 240   { 0, 0 }
 241 };
 242
 243 /** Report privileges of \a client to \a to.
 244  * @param[in] to Client requesting privilege list.
 245  * @param[in] client Client whos privileges should be listed.
 246  * @return Zero.
 247  */
 248 int
 249 client_report_privs(struct Client *to, struct Client *client)
 250 {
 251   struct MsgBuf *mb;
 252   int found1 = 0;
 253   int i;
 254
 255   mb = msgq_make(to, rpl_str(RPL_PRIVS), cli_name(&me), cli_name(to),
 256                  cli_name(client));
 257
 258   for (i = 0; privtab[i].name; i++)
 259     if (HasPriv(client, privtab[i].priv))
 260       msgq_append(0, mb, "%s%s", found1++ ? " " : "", privtab[i].name);
 261
 262   send_buffer(to, mb, 0); /* send response */
 263   msgq_clean(mb);
 264
 265   return 0;
 266 }