-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2008 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2008 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd 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, version 2.
*
- * ---------------------------------------------------
+ * 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, see <http://www.gnu.org/licenses/>.
*/
-#include "inspircd.h"
-#include "xline.h"
-
-#include "m_spanningtree/treesocket.h"
-#include "m_spanningtree/treeserver.h"
-#include "m_spanningtree/utils.h"
-
-/* $ModDep: m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/treesocket.h */
+#include "inspircd.h"
+#include "commands.h"
+#include "treeserver.h"
+#include "treesocket.h"
-/** FJOIN, similar to TS6 SJOIN, but not quite. */
-bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> ¶ms)
+/** FJOIN, almost identical to TS6 SJOIN, except for nicklist handling. */
+CmdResult CommandFJoin::Handle(User* srcuser, std::vector<std::string>& params)
{
- /* 1.1 FJOIN works as follows:
+ /* 1.1+ FJOIN works as follows:
*
* Each FJOIN is sent along with a timestamp, and the side with the lowest
* timestamp 'wins'. From this point on we will refer to this side as the
* losing side, so only its own modes get applied. Life is simple for those
* who succeed at internets. :-)
*
- * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
- * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
- * you ask? Well, quite simply because we don't need to. They'll be sent
- * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
- * the losing side sends any modes for the channel which shouldnt win,
- * they wont as their timestamp will be too high :-)
+ * Syntax:
+ * :<sid> FJOIN <chan> <TS> <modes> :[[modes,]<uuid> [[modes,]<uuid> ... ]]
+ * The last parameter is a list consisting of zero or more (modelist, uuid)
+ * pairs (permanent channels may have zero users). The mode list for each
+ * user is a concatenation of the mode letters the user has on the channel
+ * (e.g.: "ov" if the user is opped and voiced). The order of the mode letters
+ * are not important but if a server ecounters an unknown mode letter, it will
+ * drop the link to avoid desync.
+ *
+ * InspIRCd 2.0 and older required a comma before the uuid even if the user
+ * had no prefix modes on the channel, InspIRCd 2.2 and later does not require
+ * a comma in this case anymore.
+ *
*/
- if (params.size() < 2)
- return true;
-
- irc::modestacker modestack(true); /* Modes to apply from the users in the user list */
- User* who = NULL; /* User we are currently checking */
- std::string channel = params[0]; /* Channel name, as a string */
- time_t TS = atoi(params[1].c_str()); /* Timestamp given to us for remote side */
- irc::tokenstream users((params.size() > 2) ? params[2] : ""); /* users from the user list */
- bool apply_other_sides_modes = true; /* True if we are accepting the other side's modes */
- Channel* chan = this->Instance->FindChan(channel); /* The channel we're sending joins to */
- time_t ourTS = chan ? chan->age : Instance->Time()+600; /* The TS of our side of the link */
- bool created = !chan; /* True if the channel doesnt exist here yet */
- std::string item; /* One item in the list of nicks */
-
- if (params.size() > 2)
- params[2] = ":" + params[2];
-
- Utils->DoOneToAllButSender(source,"FJOIN",params,source);
-
+ time_t TS = ConvToInt(params[1]);
if (!TS)
{
- Instance->Log(DEFAULT,"*** BUG? *** TS of 0 sent to FJOIN. Are some services authors smoking craq, or is it 1970 again?. Dropped.");
- Instance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FJOIN with a TS of zero. Total craq. Command was dropped.", source.c_str());
- return true;
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "*** BUG? *** TS of 0 sent to FJOIN. Are some services authors smoking craq, or is it 1970 again?. Dropped.");
+ ServerInstance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FJOIN with a TS of zero. Total craq. Command was dropped.", srcuser->server->GetName().c_str());
+ return CMD_INVALID;
}
- if (created)
- chan = new Channel(Instance, channel, ourTS);
-
- /* If our TS is less than theirs, we dont accept their modes */
- if (ourTS < TS)
- apply_other_sides_modes = false;
+ const std::string& channel = params[0];
+ Channel* chan = ServerInstance->FindChan(channel);
+ bool apply_other_sides_modes = true;
- /* Our TS greater than theirs, clear all our modes from the channel, accept theirs. */
- if (ourTS > TS)
+ if (!chan)
{
- std::deque<std::string> param_list;
- if (Utils->AnnounceTSChange && chan)
- chan->WriteChannelWithServ(Instance->Config->ServerName, "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
- ourTS = TS;
- if (!created)
- {
- chan->age = TS;
- param_list.push_back(channel);
- this->RemoveStatus(Instance->Config->GetSID(), param_list);
- }
+ chan = new Channel(channel, TS);
}
-
- /* Now, process every 'prefixes,nick' pair */
- while (users.GetToken(item))
+ else
{
- const char* usr = item.c_str();
- if (usr && *usr)
+ time_t ourTS = chan->age;
+ if (TS != ourTS)
{
- const char* permissions = usr;
- /* Iterate through all the prefix values, convert them from prefixes to mode letters */
- std::string modes;
- while ((*permissions) && (*permissions != ','))
+ ServerInstance->SNO->WriteToSnoMask('d', "Merge FJOIN received for %s, ourTS: %lu, TS: %lu, difference: %lu",
+ chan->name.c_str(), (unsigned long)ourTS, (unsigned long)TS, (unsigned long)(ourTS - TS));
+ /* If our TS is less than theirs, we dont accept their modes */
+ if (ourTS < TS)
+ {
+ apply_other_sides_modes = false;
+ }
+ else if (ourTS > TS)
{
- ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
- if (mh)
- modes = modes + mh->GetModeChar();
- else
+ // Our TS is greater than theirs, remove all modes, extensions, etc. from the channel
+ LowerTS(chan, TS, channel);
+
+ // XXX: If the channel does not exist in the chan hash at this point, create it so the remote modes can be applied on it.
+ // This happens to 0-user permanent channels on the losing side, because those are removed (from the chan hash, then
+ // deleted later) as soon as the permchan mode is removed from them.
+ if (ServerInstance->FindChan(channel) == NULL)
{
- this->SendError(std::string("Invalid prefix '")+(*permissions)+"' in FJOIN");
- return false;
+ chan = new Channel(channel, TS);
}
- usr++;
- permissions++;
}
- /* Advance past the comma, to the nick */
- usr++;
-
- /* Check the user actually exists */
- who = this->Instance->FindUUID(usr);
- if (who)
- {
- /* Check that the user's 'direction' is correct */
- TreeServer* route_back_again = Utils->BestRouteTo(who->server);
- if ((!route_back_again) || (route_back_again->GetSocket() != this))
- continue;
+ }
+ }
- /* Add any permissions this user had to the mode stack */
- for (std::string::iterator x = modes.begin(); x != modes.end(); ++x)
- modestack.Push(*x, who->nick);
+ /* First up, apply their channel modes if they won the TS war */
+ if (apply_other_sides_modes)
+ {
+ // Need to use a modestacker here due to maxmodes
+ irc::modestacker stack(true);
+ std::vector<std::string>::const_iterator paramit = params.begin() + 3;
+ const std::vector<std::string>::const_iterator lastparamit = ((params.size() > 3) ? (params.end() - 1) : params.end());
+ for (std::string::const_iterator i = params[2].begin(); i != params[2].end(); ++i)
+ {
+ ModeHandler* mh = ServerInstance->Modes->FindMode(*i, MODETYPE_CHANNEL);
+ if (!mh)
+ continue;
- Channel::JoinUser(this->Instance, who, channel.c_str(), true, "", true, TS);
- }
- else
+ std::string modeparam;
+ if ((paramit != lastparamit) && (mh->GetNumParams(true)))
{
- Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", usr, channel.c_str());
- continue;
+ modeparam = *paramit;
+ ++paramit;
}
+
+ stack.Push(*i, modeparam);
}
+
+ std::vector<std::string> modelist;
+
+ // Mode parser needs to know what channel to act on.
+ modelist.push_back(params[0]);
+
+ while (stack.GetStackedLine(modelist))
+ {
+ ServerInstance->Modes->Process(modelist, srcuser, ModeParser::MODE_LOCALONLY | ModeParser::MODE_MERGE);
+ modelist.erase(modelist.begin() + 1, modelist.end());
+ }
+ }
+
+ irc::modestacker modestack(true);
+ TreeSocket* src_socket = TreeServer::Get(srcuser)->GetSocket();
+
+ /* Now, process every 'modes,uuid' pair */
+ irc::tokenstream users(*params.rbegin());
+ std::string item;
+ irc::modestacker* modestackptr = (apply_other_sides_modes ? &modestack : NULL);
+ while (users.GetToken(item))
+ {
+ if (!ProcessModeUUIDPair(item, src_socket, chan, modestackptr))
+ return CMD_INVALID;
}
/* Flush mode stacker if we lost the FJOIN or had equal TS */
if (apply_other_sides_modes)
+ CommandFJoin::ApplyModeStack(srcuser, chan, modestack);
+
+ return CMD_SUCCESS;
+}
+
+bool CommandFJoin::ProcessModeUUIDPair(const std::string& item, TreeSocket* src_socket, Channel* chan, irc::modestacker* modestack)
+{
+ std::string::size_type comma = item.find(',');
+
+ // Comma not required anymore if the user has no modes
+ std::string uuid = ((comma == std::string::npos) ? item : item.substr(comma+1));
+ User* who = ServerInstance->FindUUID(uuid);
+ if (!who)
{
- std::deque<std::string> stackresult;
- const char* mode_junk[MAXMODES+2];
- mode_junk[0] = channel.c_str();
+ // Probably KILLed, ignore
+ return true;
+ }
- while (modestack.GetStackedLine(stackresult))
+ /* Check that the user's 'direction' is correct */
+ TreeServer* route_back_again = TreeServer::Get(who);
+ if (route_back_again->GetSocket() != src_socket)
+ {
+ return true;
+ }
+
+ /* Check if the user received at least one mode */
+ if ((modestack) && (comma > 0) && (comma != std::string::npos))
+ {
+ /* Iterate through the modes and see if they are valid here, if so, apply */
+ std::string::const_iterator commait = item.begin()+comma;
+ for (std::string::const_iterator i = item.begin(); i != commait; ++i)
{
- for (size_t j = 0; j < stackresult.size(); j++)
+ if (!ServerInstance->Modes->FindMode(*i, MODETYPE_CHANNEL))
{
- mode_junk[j+1] = stackresult[j].c_str();
+ ServerInstance->SNO->WriteToSnoMask('d', "Unrecognised mode '%c' for a user in FJOIN, dropping link", *i);
+ return false;
}
- Instance->SendMode(mode_junk, stackresult.size() + 1, Instance->FakeClient);
+
+ /* Add any modes this user had to the mode stack */
+ modestack->Push(*i, who->nick);
}
}
+ chan->ForceJoin(who, NULL, route_back_again->bursting);
return true;
}
-/** TODO: This creates a total mess of output and needs to really use irc::modestacker.
- */
-bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> ¶ms)
+void CommandFJoin::RemoveStatus(Channel* c)
{
- if (params.size() < 1)
- return true;
+ irc::modestacker stack(false);
- Channel* c = Instance->FindChan(params[0]);
+ for (char modeletter = 'A'; modeletter <= 'z'; ++modeletter)
+ {
+ ModeHandler* mh = ServerInstance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
- if (c)
+ /* Passing a pointer to a modestacker here causes the mode to be put onto the mode stack,
+ * rather than applied immediately. Module unloads require this to be done immediately,
+ * for this function we require tidyness instead. Fixes bug #493
+ */
+ if (mh)
+ mh->RemoveMode(c, stack);
+ }
+
+ ApplyModeStack(ServerInstance->FakeClient, c, stack);
+}
+
+void CommandFJoin::ApplyModeStack(User* srcuser, Channel* c, irc::modestacker& stack)
+{
+ parameterlist stackresult;
+ stackresult.push_back(c->name);
+
+ while (stack.GetStackedLine(stackresult))
{
- for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
- {
- ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
- if (mh)
- mh->RemoveMode(c);
- }
+ ServerInstance->Modes->Process(stackresult, srcuser, ModeParser::MODE_LOCALONLY);
+ stackresult.erase(stackresult.begin() + 1, stackresult.end());
}
- return true;
}
-
+
+void CommandFJoin::LowerTS(Channel* chan, time_t TS, const std::string& newname)
+{
+ if (Utils->AnnounceTSChange)
+ chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :TS for %s changed from %lu to %lu", chan->name.c_str(), newname.c_str(), (unsigned long) chan->age, (unsigned long) TS);
+
+ // While the name is equal in case-insensitive compare, it might differ in case; use the remote version
+ chan->name = newname;
+ chan->age = TS;
+
+ // Remove all pending invites
+ chan->ClearInvites();
+
+ // Clear all modes
+ CommandFJoin::RemoveStatus(chan);
+
+ // Unset all extensions
+ chan->FreeAllExtItems();
+
+ // Clear the topic, if it isn't empty then send a topic change message to local users
+ if (!chan->topic.empty())
+ {
+ chan->topic.clear();
+ chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "TOPIC %s :", chan->name.c_str());
+ }
+ chan->setby.clear();
+ chan->topicset = 0;
+}