X-Git-Url: http://git.pk910.de/?p=ircu2.10.12-pk.git;a=blobdiff_plain;f=ircd%2Fm_silence.c;fp=ircd%2Fm_silence.c;h=ce9d4dc5ed58d63738f446cc68a1f32020ee2019;hp=0000000000000000000000000000000000000000;hb=0400a5a6479398d82526785c18c0df8bc8b92dce;hpb=d17e10da972ce5776c60b4c317267c6abe0e1ead

diff --git a/ircd/m_silence.c b/ircd/m_silence.c
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+++ b/ircd/m_silence.c
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+/*
+ * IRC - Internet Relay Chat, ircd/m_silence.c
+ * Copyright (C) 1990 Jarkko Oikarinen and
+ *                    University of Oulu, Computing Center
+ *
+ * See file AUTHORS in IRC package for additional names of
+ * the programmers.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 1, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/** @file
+ * @brief Handlers for SILENCE command.
+ * @version $Id$
+ */
+
+#include "config.h"
+
+#include "channel.h"
+#include "client.h"
+#include "hash.h"
+#include "ircd.h"
+#include "ircd_features.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_snprintf.h"
+#include "ircd_string.h"
+#include "list.h"
+#include "msg.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "s_user.h"
+#include "send.h"
+#include "struct.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <stdlib.h>
+#include <string.h>
+
+/** Attempt to apply a SILENCE update to a user.
+ *
+ * Silences are propagated lazily between servers to save on bandwidth
+ * and remote memory.  Any removal and any silence exception must be
+ * propagated until a server has not seen the mask being removed or
+ * has no positive silences for the user.
+ *
+ * @param[in] sptr Client to update.
+ * @param[in] mask Single silence mask to apply, optionally preceded by '+' or '-' and maybe '~'.
+ * @return The new ban entry on success, NULL on failure.
+ */
+static struct Ban *
+apply_silence(struct Client *sptr, char *mask)
+{
+  struct Ban *sile;
+  int flags;
+  int res;
+  char orig_mask[NICKLEN+USERLEN+HOSTLEN+3];
+
+  assert(mask && mask[0]);
+
+  /* Check for add or remove. */
+  if (mask[0] == '-') {
+    flags = BAN_DEL;
+    mask++;
+  } else if (mask[0] == '+') {
+    flags = BAN_ADD;
+    mask++;
+  } else
+    flags = BAN_ADD;
+
+  /* Check for being an exception. */
+  if (mask[0] == '~') {
+    flags |= BAN_EXCEPTION;
+    mask++;
+  }
+
+  /* Make the silence and set additional flags. */
+  ircd_strncpy(orig_mask, mask, sizeof(orig_mask) - 1);
+  sile = make_ban(pretty_mask(mask));
+  sile->flags |= flags;
+
+  /* If they're a local user trying to ban too broad a mask, forbid it. */
+  if (MyUser(sptr)
+      && (sile->flags & BAN_IPMASK)
+      && sile->addrbits > 0
+      && sile->addrbits < (irc_in_addr_is_ipv4(&sile->address) ? 112 : 32)) {
+    send_reply(sptr, ERR_MASKTOOWIDE, orig_mask);
+    free_ban(sile);
+    return NULL;
+  }
+
+  /* Apply it to the silence list. */
+  res = apply_ban(&cli_user(sptr)->silence, sile, 1);
+  return res ? NULL : sile;
+}
+
+/** Apply and send silence updates for a user.
+ * @param[in] sptr Client whose silence list has been updated.
+ * @param[in] silences Comma-separated list of silence updates.
+ * @param[in] dest Direction to send updates in (NULL for broadcast).
+ */
+static void
+forward_silences(struct Client *sptr, char *silences, struct Client *dest)
+{
+  struct Ban *accepted[MAXPARA], *sile, **plast;
+  char *cp, *p, buf[BUFSIZE];
+  size_t ac_count, buf_used, slen, ii;
+
+  /* Split the list of silences and try to apply each one in turn. */
+  for (cp = ircd_strtok(&p, silences, ","), ac_count = 0;
+       cp && (ac_count < MAXPARA);
+       cp = ircd_strtok(&p, 0, ",")) {
+    if ((sile = apply_silence(sptr, cp)))
+      accepted[ac_count++] = sile;
+  }
+
+  if (MyUser(sptr)) {
+    size_t siles, maxsiles, totlength, maxlength, jj;
+
+    /* Check that silence count and total length are permitted. */
+    maxsiles = feature_int(FEAT_MAXSILES);
+    maxlength = maxsiles * feature_int(FEAT_AVBANLEN);
+    siles = totlength = 0;
+    /* Count number of current silences and their total length. */
+    plast = &cli_user(sptr)->silence;
+    for (sile = cli_user(sptr)->silence; sile; sile = sile->next) {
+      if (sile->flags & (BAN_OVERLAPPED | BAN_ADD | BAN_DEL))
+        continue;
+      siles++;
+      totlength += strlen(sile->banstr);
+      plast = &sile->next;
+    }
+    for (ii = jj = 0; ii < ac_count; ++ii) {
+      sile = accepted[ii];
+      /* If the update is being added, and we would exceed the maximum
+       * count or length, drop the update.
+       */
+      if (!(sile->flags & (BAN_OVERLAPPED | BAN_DEL))) {
+        slen = strlen(sile->banstr);
+        if ((siles >= maxsiles) || (totlength + slen >= maxlength)) {
+          *plast = NULL;
+          if (MyUser(sptr))
+            send_reply(sptr, ERR_SILELISTFULL, accepted[ii]->banstr);
+          free_ban(accepted[ii]);
+          continue;
+        }
+        /* Update counts. */
+        siles++;
+        totlength += slen;
+        plast = &sile->next;
+      }
+      /* Store the update. */
+      accepted[jj++] = sile;
+    }
+    /* Write back the number of accepted updates. */
+    ac_count = jj;
+
+    /* Send the silence update list, including overlapped silences (to
+     * make it easier on clients).
+     */
+    buf_used = 0;
+    for (sile = cli_user(sptr)->silence; sile; sile = sile->next) {
+      char ch;
+      if (sile->flags & (BAN_OVERLAPPED | BAN_DEL))
+        ch = '-';
+      else if (sile->flags & BAN_ADD)
+        ch = '+';
+      else
+        continue;
+      slen = strlen(sile->banstr);
+      if (buf_used + slen + 4 > 400) {
+        buf[buf_used] = '\0';
+        sendcmdto_one(sptr, CMD_SILENCE, sptr, "%s", buf);
+        buf_used = 0;
+      }
+      if (buf_used)
+        buf[buf_used++] = ',';
+      buf[buf_used++] = ch;
+      if (sile->flags & BAN_EXCEPTION)
+        buf[buf_used++] = '~';
+      memcpy(buf + buf_used, sile->banstr, slen);
+      buf_used += slen;
+    }
+    if (buf_used > 0) {
+        buf[buf_used] = '\0';
+        sendcmdto_one(sptr, CMD_SILENCE, sptr, "%s", buf);
+        buf_used = 0;
+    }
+  }
+
+  /* Forward any silence removals or exceptions updates to other
+   * servers if the user has positive silences.
+   */
+  if (!dest || !MyUser(dest)) {
+    for (ii = buf_used = 0; ii < ac_count; ++ii) {
+      char ch;
+      sile = accepted[ii];
+      if (sile->flags & BAN_OVERLAPPED)
+        continue;
+      else if (sile->flags & BAN_DEL)
+        ch = '-';
+      else if (sile->flags & BAN_ADD) {
+        if (!(sile->flags & BAN_EXCEPTION))
+          continue;
+        ch = '+';
+      } else
+        continue;
+      slen = strlen(sile->banstr);
+      if (buf_used + slen + 4 > 400) {
+        buf[buf_used] = '\0';
+        if (dest)
+          sendcmdto_one(sptr, CMD_SILENCE, dest, "%C %s", dest, buf);
+        else
+          sendcmdto_serv_butone(sptr, CMD_SILENCE, sptr, "* %s", buf);
+        buf_used = 0;
+      }
+      if (buf_used)
+        buf[buf_used++] = ',';
+      buf[buf_used++] = ch;
+      if (sile->flags & BAN_EXCEPTION)
+        buf[buf_used++] = '~';
+      memcpy(buf + buf_used, sile->banstr, slen);
+      buf_used += slen;
+    }
+    if (buf_used > 0) {
+        buf[buf_used] = '\0';
+        if (dest)
+          sendcmdto_one(sptr, CMD_SILENCE, dest, "%C %s", dest, buf);
+        else
+          sendcmdto_serv_butone(sptr, CMD_SILENCE, sptr, "* %s", buf);
+        buf_used = 0;
+    }
+  }
+
+  /* Remove overlapped and deleted silences from the user's silence
+   * list.  Clear BAN_ADD since we're walking the list anyway.
+   */
+  for (plast = &cli_user(sptr)->silence; (sile = *plast) != NULL; ) {
+    if (sile->flags & (BAN_OVERLAPPED | BAN_DEL)) {
+      *plast = sile->next;
+      free_ban(sile);
+    } else {
+      sile->flags &= ~BAN_ADD;
+      *plast = sile;
+      plast = &sile->next;
+    }
+  }
+
+  /* Free any silence-deleting updates. */
+  for (ii = 0; ii < ac_count; ++ii) {
+    if ((accepted[ii]->flags & (BAN_ADD | BAN_DEL)) == BAN_DEL) {
+      free_ban(accepted[ii]);
+    }
+  }
+}
+
+/** Handle a SILENCE command from a local user.
+ * See @ref m_functions for general discussion of parameters.
+ *
+ * \a parv[1] may be any of the following:
+ * \li Omitted or empty, to view your own silence list.
+ * \li Nickname of a user, to view that user's silence list.
+ * \li A comma-separated list of silence updates
+ *
+ * @param[in] cptr Client that sent us the message.
+ * @param[in] sptr Original source of message.
+ * @param[in] parc Number of arguments.
+ * @param[in] parv Argument vector.
+ */
+int m_silence(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
+{
+  struct Client *acptr;
+  struct Ban *sile;
+
+  assert(0 != cptr);
+  assert(cptr == sptr);
+
+  /* See if the user is requesting a silence list. */
+  acptr = sptr;
+  if (parc < 2 || EmptyString(parv[1]) || (acptr = FindUser(parv[1]))) {
+    if (cli_user(acptr) && ((acptr == sptr) || IsChannelService(acptr))) {
+      for (sile = cli_user(acptr)->silence; sile; sile = sile->next) {
+        send_reply(sptr, RPL_SILELIST, cli_name(acptr),
+                   (sile->flags & BAN_EXCEPTION ? "~" : ""),  sile->banstr);
+      }
+    }
+    send_reply(sptr, RPL_ENDOFSILELIST, cli_name(acptr));
+    return 0;
+  }
+
+  /* The user must be attempting to update their list. */
+  forward_silences(sptr, parv[1], NULL);
+  return 0;
+}
+
+/** Handle a SILENCE command from a server.
+ * See @ref m_functions for general discussion of parameters.
+ *
+ * \a parv[1] may be one of the following:
+ * \li "*" to indicate a broadcast update (removing a SILENCE)
+ * \li A client numnick that should be specifically SILENCEd.
+ *
+ * \a parv[2] is a comma-separated list of silence updates.
+ *
+ * @param[in] cptr Client that sent us the message.
+ * @param[in] sptr Original source of message.
+ * @param[in] parc Number of arguments.
+ * @param[in] parv Argument vector.
+ */
+int ms_silence(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
+{
+  if (IsServer(sptr))
+    return protocol_violation(sptr, "Server trying to silence a user");
+  if (parc < 3 || EmptyString(parv[2]))
+    return need_more_params(sptr, "SILENCE");
+
+  /* Figure out which silences can be forwarded. */
+  forward_silences(sptr, parv[2], findNUser(parv[1]));
+  return 0;
+  (void)cptr;
+}