X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fcore%2Fcoresessioneventprocessor.cpp;h=e0fa8921389a22c3cfdc8423a589a0dda5a5fc93;hp=d0c75971921e38254d0a619faee82d4d666632e3;hb=714b39660fe19e7f092880019429c8da76ee2bd5;hpb=5b686746c880e5cda6d5de3e08180ea4332ff222 diff --git a/src/core/coresessioneventprocessor.cpp b/src/core/coresessioneventprocessor.cpp index d0c75971..e0fa8921 100644 --- a/src/core/coresessioneventprocessor.cpp +++ b/src/core/coresessioneventprocessor.cpp @@ -1,5 +1,5 @@ /*************************************************************************** - * Copyright (C) 2005-2012 by the Quassel Project * + * Copyright (C) 2005-2018 by the Quassel Project * * devel@quassel-irc.org * * * * This program is free software; you can redistribute it and/or modify * @@ -23,13 +23,23 @@ #include "coreirclisthelper.h" #include "corenetwork.h" #include "coresession.h" +#include "coretransfer.h" +#include "coretransfermanager.h" #include "ctcpevent.h" #include "ircevent.h" #include "ircuser.h" +#include "logmessage.h" #include "messageevent.h" #include "netsplit.h" #include "quassel.h" +#ifdef HAVE_QCA2 +# include "keyevent.h" +#endif + +// IRCv3 capabilities +#include "irccap.h" + CoreSessionEventProcessor::CoreSessionEventProcessor(CoreSession *session) : BasicHandler("handleCtcp", session), _coreSession(session) @@ -85,13 +95,23 @@ void CoreSessionEventProcessor::tryNextNick(NetworkEvent *e, const QString &errn void CoreSessionEventProcessor::processIrcEventNumeric(IrcEventNumeric *e) { switch (e->number()) { - // CAP stuff - case 903: - case 904: - case 905: - case 906: - case 907: - qobject_cast(e->network())->putRawLine("CAP END"); + // SASL authentication replies + // See: http://ircv3.net/specs/extensions/sasl-3.1.html + + //case 900: // RPL_LOGGEDIN + //case 901: // RPL_LOGGEDOUT + // Don't use 900 or 901 for updating the local hostmask. Unreal 3.2 gives it as the IP address + // even when cloaked. + // Every other reply should result in moving on + // TODO Handle errors to stop connection if appropriate + case 902: // ERR_NICKLOCKED + case 903: // RPL_SASLSUCCESS + case 904: // ERR_SASLFAIL + case 905: // ERR_SASLTOOLONG + case 906: // ERR_SASLABORTED + case 907: // ERR_SASLALREADY + // Move on to the next capability + coreNetwork(e)->sendNextCap(); break; default: @@ -112,30 +132,228 @@ void CoreSessionEventProcessor::processIrcEventAuthenticate(IrcEvent *e) CoreNetwork *net = coreNetwork(e); - QString construct = net->saslAccount(); - construct.append(QChar(QChar::Null)); - construct.append(net->saslAccount()); - construct.append(QChar(QChar::Null)); - construct.append(net->saslPassword()); - QByteArray saslData = QByteArray(construct.toAscii().toBase64()); - saslData.prepend("AUTHENTICATE "); - net->putRawLine(saslData); +#ifdef HAVE_SSL + if (net->identityPtr()->sslCert().isNull()) { +#endif + QString construct = net->saslAccount(); + construct.append(QChar(QChar::Null)); + construct.append(net->saslAccount()); + construct.append(QChar(QChar::Null)); + construct.append(net->saslPassword()); + QByteArray saslData = QByteArray(construct.toLatin1().toBase64()); + saslData.prepend("AUTHENTICATE "); + net->putRawLine(saslData); +#ifdef HAVE_SSL + } else { + net->putRawLine("AUTHENTICATE +"); + } +#endif } - void CoreSessionEventProcessor::processIrcEventCap(IrcEvent *e) { - // for SASL, there will only be a single param of 'sasl', however you can check here for - // additional CAP messages (ls, multi-prefix, et cetera). + // Handle capability negotiation + // See: http://ircv3.net/specs/core/capability-negotiation-3.2.html + // And: http://ircv3.net/specs/core/capability-negotiation-3.1.html + + // All commands require at least 2 parameters + if (!checkParamCount(e, 2)) + return; + + CoreNetwork *coreNet = coreNetwork(e); + QString capCommand = e->params().at(1).trimmed().toUpper(); + if (capCommand == "LS" || capCommand == "NEW") { + // Either we've gotten a list of capabilities, or new capabilities we may want + // Server: CAP * LS * :multi-prefix extended-join account-notify batch invite-notify tls + // Server: CAP * LS * :cap-notify server-time example.org/dummy-cap=dummyvalue example.org/second-dummy-cap + // Server: CAP * LS :userhost-in-names sasl=EXTERNAL,DH-AES,DH-BLOWFISH,ECDSA-NIST256P-CHALLENGE,PLAIN + bool capListFinished; + QStringList availableCaps; + if (e->params().count() == 4) { + // Middle of multi-line reply, ignore the asterisk + capListFinished = false; + availableCaps = e->params().at(3).split(' '); + } else { + // Single line reply + capListFinished = true; + if (e->params().count() >= 3) { + // Some capabilities are specified, add them + availableCaps = e->params().at(2).split(' '); + } else { + // No capabilities available, add an empty list + availableCaps = QStringList(); + } + } + // Sort capabilities before requesting for consistency among networks. This may avoid + // unexpected cases when some networks offer capabilities in a different order than + // others. It also looks nicer in logs. Not required. + availableCaps.sort(); + // Store what capabilities are available + QString availableCapName, availableCapValue; + for (int i = 0; i < availableCaps.count(); ++i) { + // Capability may include values, e.g. CAP * LS :multi-prefix sasl=EXTERNAL + // Capability name comes before the first '='. If no '=' exists, this gets the + // whole string instead. + availableCapName = availableCaps[i].section('=', 0, 0).trimmed(); + // Some capabilities include multiple key=value pairs in the listing, + // e.g. "sts=duration=31536000,port=6697" + // Include everything after the first equal sign as part of the value. If no '=' + // exists, this gets an empty string. + availableCapValue = availableCaps[i].section('=', 1).trimmed(); + // Only add the capability if it's non-empty + if (!availableCapName.isEmpty()) { + coreNet->addCap(availableCapName, availableCapValue); + } + } + + // Begin capability requests when capability listing complete + if (capListFinished) + coreNet->beginCapNegotiation(); + } else if (capCommand == "ACK") { + // CAP ACK requires at least 3 parameters (no empty response allowed) + if (!checkParamCount(e, 3)) { + // If an invalid reply is sent, try to continue rather than getting stuck. + coreNet->sendNextCap(); + return; + } - if (e->params().count() == 3) { - if (e->params().at(2) == "sasl") { - // FIXME use event - coreNetwork(e)->putRawLine(coreNetwork(e)->serverEncode("AUTHENTICATE PLAIN")); // Only working with PLAIN atm, blowfish later + // Server: CAP * ACK :multi-prefix sasl + // Got the capabilities we want, handle as needed. + QStringList acceptedCaps; + acceptedCaps = e->params().at(2).split(' '); + + // Store what capability was acknowledged + QString acceptedCap; + + // Keep track of whether or not a capability requires further configuration. Due to queuing + // logic in CoreNetwork::queueCap(), this shouldn't ever happen when more than one + // capability is requested, but it's better to handle edge cases or faulty servers. + bool capsRequireConfiguration = false; + + for (int i = 0; i < acceptedCaps.count(); ++i) { + acceptedCap = acceptedCaps[i].trimmed().toLower(); + // Mark this cap as accepted + coreNet->acknowledgeCap(acceptedCap); + if (!capsRequireConfiguration && + coreNet->capsRequiringConfiguration.contains(acceptedCap)) { + capsRequireConfiguration = true; + // Some capabilities (e.g. SASL) require further messages to finish. If so, do NOT + // send the next capability; it will be handled elsewhere in CoreNetwork. + // Otherwise, allow moving on to the next capability. + } + } + + if (!capsRequireConfiguration) { + // No additional configuration required, move on to the next capability + coreNet->sendNextCap(); + } + } else if (capCommand == "NAK" || capCommand == "DEL") { + // CAP NAK/DEL require at least 3 parameters (no empty response allowed) + if (!checkParamCount(e, 3)) { + if (capCommand == "NAK") { + // If an invalid reply is sent, try to continue rather than getting stuck. This + // only matters for denied caps, not removed caps. + coreNet->sendNextCap(); + } + return; + } + + // Either something went wrong with the capabilities, or they are no longer supported + // > For CAP NAK + // Server: CAP * NAK :multi-prefix sasl + // > For CAP DEL + // Server: :irc.example.com CAP modernclient DEL :multi-prefix sasl + // CAP NAK and CAP DEL replies are always single-line + + QStringList removedCaps; + removedCaps = e->params().at(2).split(' '); + + // Store the capabilities that were denied or removed + QString removedCap; + for (int i = 0; i < removedCaps.count(); ++i) { + removedCap = removedCaps[i].trimmed().toLower(); + // Mark this cap as removed. + // For CAP DEL, removes it from use. + // For CAP NAK when received before negotiation enabled these capabilities, removeCap() + // should do nothing. This merely guards against non-spec servers sending an + // unsolicited CAP ACK then later removing that capability. + coreNet->removeCap(removedCap); + } + + if (capCommand == "NAK") { + // Continue negotiation only if this is the result of denied caps, not removed caps + if (removedCaps.count() > 1) { + // We've received a CAP NAK reply to multiple capabilities at once. Unfortunately, + // we don't know which capability failed and which ones are valid to re-request, so + // individually retry each capability from the failed bundle. + // See CoreNetwork::retryCapsIndividually() for more details. + coreNet->retryCapsIndividually(); + // Still need to call sendNextCap() to carry on. + } + // Carry on with negotiation + coreNet->sendNextCap(); } } } +/* IRCv3 account-notify + * Log in: ":nick!user@host ACCOUNT accountname" + * Log out: ":nick!user@host ACCOUNT *" */ +void CoreSessionEventProcessor::processIrcEventAccount(IrcEvent *e) +{ + if (!checkParamCount(e, 1)) + return; + + IrcUser *ircuser = e->network()->updateNickFromMask(e->prefix()); + if (ircuser) { + // WHOX uses '0' to indicate logged-out, account-notify and extended-join uses '*'. + // As '*' is used internally to represent logged-out, no need to handle that differently. + ircuser->setAccount(e->params().at(0)); + } else { + qDebug() << "Received account-notify data for unknown user" << e->prefix(); + } +} + +/* IRCv3 away-notify - ":nick!user@host AWAY [:message]" */ +void CoreSessionEventProcessor::processIrcEventAway(IrcEvent *e) +{ + if (!checkParamCount(e, 1)) + return; + // Don't use checkParamCount(e, 2) since the message is optional. Some servers respond in a way + // that it counts as two parameters, but we shouldn't rely on that. + + // Nick is sent as part of parameters in order to split user/server decoding + IrcUser *ircuser = e->network()->ircUser(e->params().at(0)); + if (ircuser) { + // If two parameters are sent -and- the second parameter isn't empty, then user is away. + // Otherwise, mark them as not away. + if (e->params().count() >= 2 && !e->params().at(1).isEmpty()) { + ircuser->setAway(true); + ircuser->setAwayMessage(e->params().at(1)); + } else { + ircuser->setAway(false); + } + } else { + qDebug() << "Received away-notify data for unknown user" << e->params().at(0); + } +} + +/* IRCv3 chghost - ":nick!user@host CHGHOST newuser new.host.goes.here" */ +void CoreSessionEventProcessor::processIrcEventChghost(IrcEvent *e) +{ + if (!checkParamCount(e, 2)) + return; + + IrcUser *ircuser = e->network()->updateNickFromMask(e->prefix()); + if (ircuser) { + // Update with new user/hostname information. setUser/setHost handles checking what + // actually changed. + ircuser->setUser(e->params().at(0)); + ircuser->setHost(e->params().at(1)); + } else { + qDebug() << "Received chghost data for unknown user" << e->prefix(); + } +} void CoreSessionEventProcessor::processIrcEventInvite(IrcEvent *e) { @@ -144,7 +362,7 @@ void CoreSessionEventProcessor::processIrcEventInvite(IrcEvent *e) } } - +/* JOIN: ": JOIN " */ void CoreSessionEventProcessor::processIrcEventJoin(IrcEvent *e) { if (e->testFlag(EventManager::Fake)) // generated by handleEarlyNetsplitJoin @@ -157,6 +375,26 @@ void CoreSessionEventProcessor::processIrcEventJoin(IrcEvent *e) QString channel = e->params()[0]; IrcUser *ircuser = net->updateNickFromMask(e->prefix()); + if (net->capEnabled(IrcCap::EXTENDED_JOIN)) { + if (e->params().count() < 3) { + // Some IRC servers don't send extended-join events in all situations. Rather than + // ignore the join entirely, treat it as a regular join with a debug-level log entry. + // See: https://github.com/inspircd/inspircd/issues/821 + qDebug() << "extended-join requires 3 params, got:" << e->params() << ", handling as a " + "regular join"; + } else { + // If logged in, :nick!user@host JOIN #channelname accountname :Real Name + // If logged out, :nick!user@host JOIN #channelname * :Real Name + // See: http://ircv3.net/specs/extensions/extended-join-3.1.html + // WHOX uses '0' to indicate logged-out, account-notify and extended-join uses '*'. + // As '*' is used internally to represent logged-out, no need to handle that differently. + ircuser->setAccount(e->params()[1]); + // Update the user's real name, too + ircuser->setRealName(e->params()[2]); + } + } + // Else :nick!user@host JOIN #channelname + bool handledByNetsplit = false; foreach(Netsplit* n, _netsplits.value(e->network())) { handledByNetsplit = n->userJoined(e->prefix(), channel); @@ -164,6 +402,17 @@ void CoreSessionEventProcessor::processIrcEventJoin(IrcEvent *e) break; } + // With "away-notify" enabled, some IRC servers forget to send :away messages for users who join + // channels while away. Unfortunately, working around this involves WHO'ng every single user as + // they join, which is not very efficient. If at all possible, it's better to get the issue + // fixed in the IRC server instead. + // + // If pursuing a workaround instead, this is where you'd do it. Check the version control + // history for the commit that added this comment to see how to implement it - there's some + // unexpected situations to watch out for! + // + // See https://ircv3.net/specs/extensions/away-notify-3.1.html + if (!handledByNetsplit) ircuser->joinChannel(channel); else @@ -171,6 +420,8 @@ void CoreSessionEventProcessor::processIrcEventJoin(IrcEvent *e) if (net->isMe(ircuser)) { net->setChannelJoined(channel); + // Mark the message as Self + e->setFlag(EventManager::Self); // FIXME use event net->putRawLine(net->serverEncode("MODE " + channel)); // we want to know the modes of the channel we just joined, so we ask politely } @@ -208,17 +459,17 @@ void CoreSessionEventProcessor::processIrcEventMode(IrcEvent *e) QString modes = e->params()[1]; bool add = true; int paramOffset = 2; - for (int c = 0; c < modes.length(); c++) { - if (modes[c] == '+') { + for (auto mode : modes) { + if (mode == '+') { add = true; continue; } - if (modes[c] == '-') { + if (mode == '-') { add = false; continue; } - if (e->network()->prefixModes().contains(modes[c])) { + if (e->network()->prefixModes().contains(mode)) { // user channel modes (op, voice, etc...) if (paramOffset < e->params().count()) { IrcUser *ircUser = e->network()->ircUser(e->params()[paramOffset]); @@ -232,15 +483,15 @@ void CoreSessionEventProcessor::processIrcEventMode(IrcEvent *e) foreach(Netsplit* n, _netsplits.value(e->network())) { handledByNetsplit = n->userAlreadyJoined(ircUser->hostmask(), channel->name()); if (handledByNetsplit) { - n->addMode(ircUser->hostmask(), channel->name(), QString(modes[c])); + n->addMode(ircUser->hostmask(), channel->name(), QString(mode)); break; } } if (!handledByNetsplit) - channel->addUserMode(ircUser, QString(modes[c])); + channel->addUserMode(ircUser, QString(mode)); } else - channel->removeUserMode(ircUser, QString(modes[c])); + channel->removeUserMode(ircUser, QString(mode)); } } else { @@ -251,7 +502,7 @@ void CoreSessionEventProcessor::processIrcEventMode(IrcEvent *e) else { // regular channel modes QString value; - Network::ChannelModeType modeType = e->network()->channelModeType(modes[c]); + Network::ChannelModeType modeType = e->network()->channelModeType(mode); if (modeType == Network::A_CHANMODE || modeType == Network::B_CHANMODE || (modeType == Network::C_CHANMODE && add)) { if (paramOffset < e->params().count()) { value = e->params()[paramOffset]; @@ -263,9 +514,9 @@ void CoreSessionEventProcessor::processIrcEventMode(IrcEvent *e) } if (add) - channel->addChannelMode(modes[c], value); + channel->addChannelMode(mode, value); else - channel->removeChannelMode(modes[c], value); + channel->removeChannelMode(mode, value); } } } @@ -296,12 +547,33 @@ void CoreSessionEventProcessor::processIrcEventMode(IrcEvent *e) ircUser->removeUserModes(removeModes); if (e->network()->isMe(ircUser)) { + // Mark the message as Self + e->setFlag(EventManager::Self); coreNetwork(e)->updatePersistentModes(addModes, removeModes); } } } +void CoreSessionEventProcessor::processIrcEventNick(IrcEvent *e) +{ + if (checkParamCount(e, 1)) { + IrcUser *ircuser = e->network()->updateNickFromMask(e->prefix()); + if (!ircuser) { + qWarning() << Q_FUNC_INFO << "Unknown IrcUser!"; + return; + } + + if (e->network()->isMe(ircuser)) { + // Mark the message as Self + e->setFlag(EventManager::Self); + } + + // Actual processing is handled in lateProcessIrcEventNick(), this just sets the event flag + } +} + + void CoreSessionEventProcessor::lateProcessIrcEventNick(IrcEvent *e) { if (checkParamCount(e, 1)) { @@ -322,6 +594,25 @@ void CoreSessionEventProcessor::lateProcessIrcEventNick(IrcEvent *e) } +void CoreSessionEventProcessor::processIrcEventPart(IrcEvent *e) +{ + if (checkParamCount(e, 1)) { + IrcUser *ircuser = e->network()->updateNickFromMask(e->prefix()); + if (!ircuser) { + qWarning() << Q_FUNC_INFO<< "Unknown IrcUser!"; + return; + } + + if (e->network()->isMe(ircuser)) { + // Mark the message as Self + e->setFlag(EventManager::Self); + } + + // Actual processing is handled in lateProcessIrcEventNick(), this just sets the event flag + } +} + + void CoreSessionEventProcessor::lateProcessIrcEventPart(IrcEvent *e) { if (checkParamCount(e, 1)) { @@ -332,8 +623,9 @@ void CoreSessionEventProcessor::lateProcessIrcEventPart(IrcEvent *e) } QString channel = e->params().at(0); ircuser->partChannel(channel); - if (e->network()->isMe(ircuser)) + if (e->network()->isMe(ircuser)) { qobject_cast(e->network())->setChannelParted(channel); + } } } @@ -342,20 +634,78 @@ void CoreSessionEventProcessor::processIrcEventPing(IrcEvent *e) { QString param = e->params().count() ? e->params().first() : QString(); // FIXME use events - coreNetwork(e)->putRawLine("PONG " + coreNetwork(e)->serverEncode(param)); + // Take priority so this won't get stuck behind other queued messages. + coreNetwork(e)->putRawLine("PONG " + coreNetwork(e)->serverEncode(param), true); } void CoreSessionEventProcessor::processIrcEventPong(IrcEvent *e) { - // the server is supposed to send back what we passed as param. and we send a timestamp - // but using quote and whatnought one can send arbitrary pings, so we have to do some sanity checks - if (checkParamCount(e, 2)) { - QString timestamp = e->params().at(1); - QTime sendTime = QTime::fromString(timestamp, "hh:mm:ss.zzz"); - if (sendTime.isValid()) - e->network()->setLatency(sendTime.msecsTo(QTime::currentTime()) / 2); + // Ensure we get at least one parameter + if (!checkParamCount(e, 1)) + return; + + // Some IRC servers respond with only one parameter, others respond with two, with the latter + // being the text sent. Handle both situations. + QString timestamp; + if (e->params().count() < 2) { + // Only one parameter received + // :localhost PONG 02:43:49.565 + timestamp = e->params().at(0); + } else { + // Two parameters received, pick the second + // :localhost PONG localhost :02:43:49.565 + timestamp = e->params().at(1); + } + + // The server is supposed to send back what we passed as parameter, and we send a timestamp. + // However, using quote and whatnot, one can send arbitrary pings, and IRC servers may decide to + // ignore our requests entirely and send whatever they want, so we have to do some sanity + // checks. + // + // Attempt to parse the timestamp + QTime sendTime = QTime::fromString(timestamp, "hh:mm:ss.zzz"); + if (sendTime.isValid()) { + // Mark IRC server as sending valid ping replies + if (!coreNetwork(e)->isPongTimestampValid()) { + coreNetwork(e)->setPongTimestampValid(true); + // Add a message the first time it happens + qDebug().nospace() << "Received PONG with valid timestamp, marking pong replies on " + "network " + << "\"" << qPrintable(e->network()->networkName()) << "\" (ID: " + << qPrintable(QString::number(e->network()->networkId().toInt())) + << ") as usable for latency measurement"; + } + // Remove pending flag + coreNetwork(e)->resetPongReplyPending(); + + // Don't show this in the UI + e->setFlag(EventManager::Silent); + // TODO: To allow for a user-sent /ping (without arguments, so default timestamp is used), + // this could track how many automated PINGs have been sent by the core and subtract one + // each time, only marking the PING as silent if there's pending automated pong replies. + // However, that's a behavior change which warrants further testing. For now, take the + // simpler, previous approach that errs on the side of silencing too much. + + // Calculate latency from time difference, divided by 2 to account for round-trip time + e->network()->setLatency(sendTime.msecsTo(QTime::currentTime()) / 2); + } else if (coreNetwork(e)->isPongReplyPending() && !coreNetwork(e)->isPongTimestampValid()) { + // There's an auto-PING reply pending and we've not yet received a PONG reply with a valid + // timestamp. It's possible this server will never respond with a valid timestamp, and thus + // any automated PINGs will result in unwanted spamming of the server buffer. + + // Don't show this in the UI + e->setFlag(EventManager::Silent); + // Remove pending flag + coreNetwork(e)->resetPongReplyPending(); + + // Log a message + qDebug().nospace() << "Received PONG with invalid timestamp from network " + << "\"" << qPrintable(e->network()->networkName()) << "\" (ID: " + << qPrintable(QString::number(e->network()->networkId().toInt())) + << "), silencing, parameters are " << e->params(); } + // else: We're not expecting a PONG reply and timestamp is not valid, assume it's from the user } @@ -365,6 +715,11 @@ void CoreSessionEventProcessor::processIrcEventQuit(IrcEvent *e) if (!ircuser) return; + if (e->network()->isMe(ircuser)) { + // Mark the message as Self + e->setFlag(EventManager::Self); + } + QString msg; if (e->params().count() > 0) msg = e->params()[0]; @@ -410,23 +765,76 @@ void CoreSessionEventProcessor::lateProcessIrcEventQuit(IrcEvent *e) void CoreSessionEventProcessor::processIrcEventTopic(IrcEvent *e) { if (checkParamCount(e, 2)) { - e->network()->updateNickFromMask(e->prefix()); + IrcUser *ircuser = e->network()->updateNickFromMask(e->prefix()); + + if (e->network()->isMe(ircuser)) { + // Mark the message as Self + e->setFlag(EventManager::Self); + } + IrcChannel *channel = e->network()->ircChannel(e->params().at(0)); if (channel) channel->setTopic(e->params().at(1)); } } - -/* RPL_WELCOME */ -void CoreSessionEventProcessor::processIrcEvent001(IrcEvent *e) +/* ERROR - "ERROR :reason" +Example: ERROR :Closing Link: nickname[xxx.xxx.xxx.xxx] (Large base64 image paste.) +See https://tools.ietf.org/html/rfc2812#section-3.7.4 */ +void CoreSessionEventProcessor::processIrcEventError(IrcEvent *e) { if (!checkParamCount(e, 1)) return; - QString myhostmask = e->params().at(0).section(' ', -1, -1); + if (coreNetwork(e)->disconnectExpected()) { + // During QUIT, the server should send an error (often, but not always, "Closing Link"). As + // we're expecting it, don't show this to the user. + e->setFlag(EventManager::Silent); + } +} + + +#ifdef HAVE_QCA2 +void CoreSessionEventProcessor::processKeyEvent(KeyEvent *e) +{ + if (!Cipher::neededFeaturesAvailable()) { + emit newEvent(new MessageEvent(Message::Error, e->network(), tr("Unable to perform key exchange, missing qca-ossl plugin."), e->prefix(), e->target(), Message::None, e->timestamp())); + return; + } + auto *net = qobject_cast(e->network()); + Cipher *c = net->cipher(e->target()); + if (!c) // happens when there is no CoreIrcChannel for the target (i.e. never?) + return; + + if (e->exchangeType() == KeyEvent::Init) { + QByteArray pubKey = c->parseInitKeyX(e->key()); + if (pubKey.isEmpty()) { + emit newEvent(new MessageEvent(Message::Error, e->network(), tr("Unable to parse the DH1080_INIT. Key exchange failed."), e->prefix(), e->target(), Message::None, e->timestamp())); + return; + } else { + net->setCipherKey(e->target(), c->key()); + emit newEvent(new MessageEvent(Message::Info, e->network(), tr("Your key is set and messages will be encrypted."), e->prefix(), e->target(), Message::None, e->timestamp())); + QList p; + p << net->serverEncode(e->target()) << net->serverEncode("DH1080_FINISH ")+pubKey; + net->putCmd("NOTICE", p); + } + } else { + if (c->parseFinishKeyX(e->key())) { + net->setCipherKey(e->target(), c->key()); + emit newEvent(new MessageEvent(Message::Info, e->network(), tr("Your key is set and messages will be encrypted."), e->prefix(), e->target(), Message::None, e->timestamp())); + } else { + emit newEvent(new MessageEvent(Message::Info, e->network(), tr("Failed to parse DH1080_FINISH. Key exchange failed."), e->prefix(), e->target(), Message::None, e->timestamp())); + } + } +} +#endif + + +/* RPL_WELCOME */ +void CoreSessionEventProcessor::processIrcEvent001(IrcEventNumeric *e) +{ e->network()->setCurrentServer(e->prefix()); - e->network()->setMyNick(nickFromMask(myhostmask)); + e->network()->setMyNick(e->target()); } @@ -500,7 +908,9 @@ void CoreSessionEventProcessor::processIrcEvent301(IrcEvent *e) if (ircuser) { ircuser->setAway(true); ircuser->setAwayMessage(e->params().at(1)); - //ircuser->setLastAwayMessage(now); + // lastAwayMessageTime is set in EventStringifier::processIrcEvent301(), no need to set it + // here too + //ircuser->setLastAwayMessageTime(now); } } @@ -613,8 +1023,18 @@ void CoreSessionEventProcessor::processIrcEvent317(IrcEvent *e) int idleSecs = e->params()[1].toInt(); if (e->params().count() > 3) { // if we have more then 3 params we have the above mentioned "real life" situation - int logintime = e->params()[2].toInt(); - loginTime = QDateTime::fromTime_t(logintime); + // Allow for 64-bit time + qint64 logintime = e->params()[2].toLongLong(); + // Time in IRC protocol is defined as seconds. Convert from seconds instead. + // See https://doc.qt.io/qt-5/qdatetime.html#fromSecsSinceEpoch +#if QT_VERSION >= 0x050800 + loginTime = QDateTime::fromSecsSinceEpoch(logintime); +#else + // fromSecsSinceEpoch() was added in Qt 5.8. Manually downconvert to seconds for + // now. + // See https://doc.qt.io/qt-5/qdatetime.html#fromMSecsSinceEpoch + loginTime = QDateTime::fromMSecsSinceEpoch((qint64)(logintime * 1000)); +#endif } IrcUser *ircuser = e->network()->ircUser(e->params()[0]); @@ -639,10 +1059,13 @@ void CoreSessionEventProcessor::processIrcEvent322(IrcEvent *e) switch (e->params().count()) { case 3: topic = e->params()[2]; + // fallthrough case 2: userCount = e->params()[1].toUInt(); + // fallthrough case 1: channelName = e->params()[0]; + // fallthrough default: break; } @@ -669,6 +1092,21 @@ void CoreSessionEventProcessor::processIrcEvent324(IrcEvent *e) } +/* RPL_WHOISACCOUNT - " :is authed as" */ +void CoreSessionEventProcessor::processIrcEvent330(IrcEvent *e) +{ + // Though the ":is authed as" remark should always be there, we should handle cases when it's + // not included, too. + if (!checkParamCount(e, 2)) + return; + + IrcUser *ircuser = e->network()->ircUser(e->params().at(0)); + if (ircuser) { + ircuser->setAccount(e->params().at(1)); + } +} + + /* RPL_NOTOPIC */ void CoreSessionEventProcessor::processIrcEvent331(IrcEvent *e) { @@ -703,17 +1141,19 @@ void CoreSessionEventProcessor::processIrcEvent352(IrcEvent *e) QString channel = e->params()[0]; IrcUser *ircuser = e->network()->ircUser(e->params()[4]); if (ircuser) { - ircuser->setUser(e->params()[1]); - ircuser->setHost(e->params()[2]); - - bool away = e->params()[5].startsWith("G"); - ircuser->setAway(away); - ircuser->setServer(e->params()[3]); - ircuser->setRealName(e->params().last().section(" ", 1)); + // Only process the WHO information if an IRC user exists. Don't create an IRC user here; + // there's no way to track when the user quits, which would leave a phantom IrcUser lying + // around. + // NOTE: Whenever MONITOR support is introduced, the IrcUser will be created by an + // RPL_MONONLINE numeric before any WHO commands are run. + processWhoInformation(e->network(), channel, ircuser, e->params()[3], e->params()[1], + e->params()[2], e->params()[5], e->params().last().section(" ", 1)); } - if (coreNetwork(e)->isAutoWhoInProgress(channel)) + // Check if channel name has a who in progress. + if (coreNetwork(e)->isAutoWhoInProgress(channel)) { e->setFlag(EventManager::Silent); + } } @@ -736,14 +1176,35 @@ void CoreSessionEventProcessor::processIrcEvent353(IrcEvent *e) QStringList nicks; QStringList modes; - foreach(QString nick, e->params()[2].split(' ')) { + // Cache result of multi-prefix to avoid unneeded casts and lookups with each iteration. + bool _useCapMultiPrefix = coreNetwork(e)->capEnabled(IrcCap::MULTI_PREFIX); + + foreach(QString nick, e->params()[2].split(' ', QString::SkipEmptyParts)) { QString mode; - if (e->network()->prefixes().contains(nick[0])) { + if (_useCapMultiPrefix) { + // If multi-prefix is enabled, all modes will be sent in NAMES replies. + // :hades.arpa 353 guest = #tethys :~&@%+aji &@Attila @+alyx +KindOne Argure + // See: http://ircv3.net/specs/extensions/multi-prefix-3.1.html + while (e->network()->prefixes().contains(nick[0])) { + // Mode found in 1 left-most character, add it to the list. + // Note: sending multiple modes may cause a warning in older clients. + // In testing, the clients still seemed to function fine. + mode.append(e->network()->prefixToMode(nick[0])); + // Remove this mode from the nick + nick = nick.remove(0, 1); + } + } else if (e->network()->prefixes().contains(nick[0])) { + // Multi-prefix is disabled and a mode prefix was found. mode = e->network()->prefixToMode(nick[0]); nick = nick.mid(1); } + // If userhost-in-names capability is enabled, the following will be + // in the form "nick!user@host" rather than "nick". This works without + // special handling as the following use nickFromHost() as needed. + // See: http://ircv3.net/specs/extensions/userhost-in-names-3.2.html + nicks << nick; modes << mode; } @@ -752,6 +1213,129 @@ void CoreSessionEventProcessor::processIrcEvent353(IrcEvent *e) } +/* RPL_WHOSPCRPL: " 152 # ~ + ("H"/ "G") :" + is * if not specific to any channel + is * if not logged in +Follows HexChat's usage of 'whox' +See https://github.com/hexchat/hexchat/blob/c874a9525c9b66f1d5ddcf6c4107d046eba7e2c5/src/common/proto-irc.c#L750 +And http://faerion.sourceforge.net/doc/irc/whox.var*/ +void CoreSessionEventProcessor::processIrcEvent354(IrcEvent *e) +{ + // First only check if at least one parameter exists. Otherwise, it'll stop the result from + // being shown if the user chooses different parameters. + if (!checkParamCount(e, 1)) + return; + + if (e->params()[0].toUInt() != IrcCap::ACCOUNT_NOTIFY_WHOX_NUM) { + // Ignore WHOX replies without expected number for we have no idea what fields are specified + return; + } + + // Now we're fairly certain this is supposed to be an automated WHOX. Bail out if it doesn't + // match what we require - 9 parameters. + if (!checkParamCount(e, 9)) + return; + + QString channel = e->params()[1]; + IrcUser *ircuser = e->network()->ircUser(e->params()[5]); + if (ircuser) { + // Only process the WHO information if an IRC user exists. Don't create an IRC user here; + // there's no way to track when the user quits, which would leave a phantom IrcUser lying + // around. + // NOTE: Whenever MONITOR support is introduced, the IrcUser will be created by an + // RPL_MONONLINE numeric before any WHO commands are run. + processWhoInformation(e->network(), channel, ircuser, e->params()[4], e->params()[2], + e->params()[3], e->params()[6], e->params().last()); + // Don't use .section(" ", 1) with WHOX replies, for there's no hopcount to trim out + + // As part of IRCv3 account-notify, check account name + // WHOX uses '0' to indicate logged-out, account-notify and extended-join uses '*'. + QString newAccount = e->params()[7]; + if (newAccount != "0") { + // Account logged in, set account name + ircuser->setAccount(newAccount); + } else { + // Account logged out, set account name to logged-out + ircuser->setAccount("*"); + } + } + + // Check if channel name has a who in progress. + if (coreNetwork(e)->isAutoWhoInProgress(channel)) { + e->setFlag(EventManager::Silent); + } +} + + +void CoreSessionEventProcessor::processWhoInformation (Network *net, const QString &targetChannel, IrcUser *ircUser, + const QString &server, const QString &user, const QString &host, + const QString &awayStateAndModes, const QString &realname) +{ + ircUser->setUser(user); + ircUser->setHost(host); + ircUser->setServer(server); + ircUser->setRealName(realname); + + bool away = awayStateAndModes.contains("G", Qt::CaseInsensitive); + ircUser->setAway(away); + + if (net->capEnabled(IrcCap::MULTI_PREFIX)) { + // If multi-prefix is enabled, all modes will be sent in WHO replies. + // :kenny.chatspike.net 352 guest #test grawity broken.symlink *.chatspike.net grawity H@%+ :0 Mantas M. + // See: http://ircv3.net/specs/extensions/multi-prefix-3.1.html + QString uncheckedModes = awayStateAndModes; + QString validModes = QString(); + while (!uncheckedModes.isEmpty()) { + // Mode found in 1 left-most character, add it to the list + if (net->prefixes().contains(uncheckedModes[0])) { + validModes.append(net->prefixToMode(uncheckedModes[0])); + } + // Remove this mode from the list of unchecked modes + uncheckedModes = uncheckedModes.remove(0, 1); + } + + // Some IRC servers decide to not follow the spec, returning only -some- of the user + // modes in WHO despite listing them all in NAMES. For now, assume it can only add + // and not take away. *sigh* + if (!validModes.isEmpty()) { + if (targetChannel != "*") { + // Channel-specific modes received, apply to given channel only + IrcChannel *ircChan = net->ircChannel(targetChannel); + if (ircChan) { + // Do one mode at a time + // TODO Better way of syncing this without breaking protocol? + for (int i = 0; i < validModes.count(); ++i) { + ircChan->addUserMode(ircUser, validModes.at(i)); + } + } + } else { + // Modes apply to the user everywhere + ircUser->addUserModes(validModes); + } + } + } +} + + +/* ERR_NOSUCHCHANNEL - " :No such channel" */ +void CoreSessionEventProcessor::processIrcEvent403(IrcEventNumeric *e) +{ + // If this is the result of an AutoWho, hide it. It's confusing to show to the user. + // Though the ":No such channel" remark should always be there, we should handle cases when it's + // not included, too. + if (!checkParamCount(e, 1)) + return; + + QString channelOrNick = e->params()[0]; + // Check if channel name has a who in progress. + // If not, then check if user nick exists and has a who in progress. + if (coreNetwork(e)->isAutoWhoInProgress(channelOrNick)) { + qDebug() << "Channel/nick" << channelOrNick << "no longer exists during AutoWho, ignoring"; + e->setFlag(EventManager::Silent); + } +} + /* ERR_ERRONEUSNICKNAME */ void CoreSessionEventProcessor::processIrcEvent432(IrcEventNumeric *e) { @@ -894,7 +1478,7 @@ void CoreSessionEventProcessor::handleEarlyNetsplitJoin(Network *net, const QStr void CoreSessionEventProcessor::handleNetsplitFinished() { - Netsplit *n = qobject_cast(sender()); + auto *n = qobject_cast(sender()); Q_ASSERT(n); QHash splithash = _netsplits.take(n->network()); splithash.remove(splithash.key(n)); @@ -956,20 +1540,91 @@ void CoreSessionEventProcessor::handleCtcpClientinfo(CtcpEvent *e) } +// http://www.irchelp.org/irchelp/rfc/ctcpspec.html +// http://en.wikipedia.org/wiki/Direct_Client-to-Client +void CoreSessionEventProcessor::handleCtcpDcc(CtcpEvent *e) +{ + // DCC support is unfinished, experimental and potentially dangerous, so make it opt-in + if (!Quassel::isOptionSet("enable-experimental-dcc")) { + quInfo() << "DCC disabled, start core with --enable-experimental-dcc if you really want to try it out"; + return; + } + + // normal: SEND [] + // reverse: SEND 0 + QStringList params = e->param().split(' '); + if (params.count()) { + QString cmd = params[0].toUpper(); + if (cmd == "SEND") { + if (params.count() < 4) { + qWarning() << "Invalid DCC SEND request:" << e; // TODO emit proper error to client + return; + } + QString filename = params[1]; + QHostAddress address; + quint16 port = params[3].toUShort(); + quint64 size = 0; + QString numIp = params[2]; // this is either IPv4 as a 32 bit value, or IPv6 (which always contains a colon) + if (numIp.contains(':')) { // IPv6 + if (!address.setAddress(numIp)) { + qWarning() << "Invalid IPv6:" << numIp; + return; + } + } + else { + address.setAddress(numIp.toUInt()); + } + + if (port == 0) { // Reverse DCC is indicated by a 0 port + emit newEvent(new MessageEvent(Message::Error, e->network(), tr("Reverse DCC SEND not supported"), e->prefix(), e->target(), Message::None, e->timestamp())); + return; + } + if (port < 1024) { + qWarning() << "Privileged port requested:" << port; // FIXME ask user if this is ok + } + + + if (params.count() > 4) { // filesize is optional + size = params[4].toULong(); + } + + // TODO: check if target is the right thing to use for the partner + CoreTransfer *transfer = new CoreTransfer(Transfer::Direction::Receive, e->target(), filename, address, port, size, this); + coreSession()->signalProxy()->synchronize(transfer); + coreSession()->transferManager()->addTransfer(transfer); + } + else { + emit newEvent(new MessageEvent(Message::Error, e->network(), tr("DCC %1 not supported").arg(cmd), e->prefix(), e->target(), Message::None, e->timestamp())); + return; + } + } +} + + void CoreSessionEventProcessor::handleCtcpPing(CtcpEvent *e) { - e->setReply(e->param()); + e->setReply(e->param().isNull() ? "" : e->param()); } void CoreSessionEventProcessor::handleCtcpTime(CtcpEvent *e) { - e->setReply(QDateTime::currentDateTime().toString()); + // Use the ISO standard to avoid locale-specific translated names + // Include timezone offset data to show which timezone a user's in, otherwise we're providing + // NTP-over-IRC with terrible accuracy. + e->setReply(formatDateTimeToOffsetISO(QDateTime::currentDateTime())); } void CoreSessionEventProcessor::handleCtcpVersion(CtcpEvent *e) { - e->setReply(QString("Quassel IRC %1 (built on %2) -- http://www.quassel-irc.org") - .arg(Quassel::buildInfo().plainVersionString).arg(Quassel::buildInfo().buildDate)); + // Deliberately do not translate project name + // Use the ISO standard to avoid locale-specific translated names + // Use UTC time to provide a consistent string regardless of timezone + // (Statistics tracking tools usually only group client versions by exact string matching) + e->setReply(QString("Quassel IRC %1 (version date %2) -- https://www.quassel-irc.org") + .arg(Quassel::buildInfo().plainVersionString) + .arg(Quassel::buildInfo().commitDate.isEmpty() ? + "unknown" : tryFormatUnixEpoch(Quassel::buildInfo().commitDate, + Qt::DateFormat::ISODate, true))); }