/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2017-2026 Sadie Powell <sadie@sadiepowell.dev>
* Copyright (C) 2013-2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2008 Craig Edwards <brain@inspircd.org>
*
* 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 <sstream>
#include "inspircd.h"
#include "dynamic.h"
#include "modules/extban.h"
#include "utility/container.h"
#include "treeserver.h"
#include "utils.h"
#include "link.h"
#include "main.h"
struct CapabDiff final
{
struct Config final
{
// The thing which differs.
std::string what;
// The value on the local server.
std::optional<std::string> local;
// The value on the remote server.
std::optional<std::string> remote;
};
// Feature with different config on the local server vs the remote server.
insp::casemapped_multimap<Config> config;
// Feature which is not available on the local server.
std::vector<std::string> localmissing;
// Feature which is not available on the remote server.
std::vector<std::string> remotemissing;
operator bool() const
{
return config.empty() && localmissing.empty() && remotemissing.empty();
}
};
namespace
{
// A map which holds the difference between local and remote tokens.
using TokenDiff = insp::casemapped_map<std::pair<std::optional<std::string>, std::optional<std::string>>>;
// Builds a list of local capabilities.
CapabData::CapabilityMap BuildCapabilityList(TreeSocket* ts)
{
CapabData::CapabilityMap capabilities = {
{ "CASEMAPPING", ServerInstance->Config->CaseMapping },
{ "MAXAWAY", ConvToStr(ServerInstance->Config->Limits.MaxAway) },
{ "MAXCHANNEL", ConvToStr(ServerInstance->Config->Limits.MaxChannel) },
{ "MAXHOST", ConvToStr(ServerInstance->Config->Limits.MaxHost) },
{ "MAXKEY", ConvToStr(ServerInstance->Config->Limits.MaxKey) },
{ "MAXKICK", ConvToStr(ServerInstance->Config->Limits.MaxKick) },
{ "MAXLINE", ConvToStr(ServerInstance->Config->Limits.MaxLine) },
{ "MAXMODES", ConvToStr(ServerInstance->Config->Limits.MaxModes) },
{ "MAXNICK", ConvToStr(ServerInstance->Config->Limits.MaxNick) },
{ "MAXQUIT", ConvToStr(ServerInstance->Config->Limits.MaxQuit) },
{ "MAXREAL", ConvToStr(ServerInstance->Config->Limits.MaxReal) },
{ "MAXTOPIC", ConvToStr(ServerInstance->Config->Limits.MaxTopic) },
{ "MAXUSER", ConvToStr(ServerInstance->Config->Limits.MaxUser) },
};
// If SHA256 hashing support is available then send a challenge token.
if (ts->proto_version < PROTO_INSPIRCD_5 && ServerInstance->Modules.FindService("Hash::Provider", "sha256"))
{
if (ts->GetOurChallenge().empty())
ts->SetOurChallenge(ServerInstance->GenRandomStr(20));
capabilities["CHALLENGE"] = ts->GetOurChallenge();
}
ExtBan::ManagerRef extbanmgr(Utils->CreatorPtr);
if (extbanmgr)
{
std::string& xbformat = capabilities["EXTBANFORMAT"];
switch (extbanmgr->GetFormat())
{
case ExtBan::Format::ANY:
xbformat = "any";
break;
case ExtBan::Format::NAME:
xbformat = "name";
break;
case ExtBan::Format::LETTER:
xbformat = "letter";
break;
}
}
return capabilities;
}
// Builds a list of the local extbans.
CapabData::ExtBanMap BuildExtBanList()
{
CapabData::ExtBanMap extbans;
ExtBan::ManagerRef extbanmgr(Utils->CreatorPtr);
if (extbanmgr)
{
for (const auto& [_, extban] : extbanmgr->GetNameMap())
{
CapabData::ExtBanData data;
data.name = extban->GetName();
data.letter = extban->GetLetter();
switch (extban->GetType())
{
case ExtBan::Type::ACTING:
data.type = "acting";
break;
case ExtBan::Type::MATCHING:
data.type = "matching";
break;
}
extbans.emplace(data.name, std::move(data));
}
}
return extbans;
}
// Builds a list of the local modes of the specified type.
CapabData::ModeMap BuildModeList(ModeType mt, uint16_t protocol)
{
CapabData::ModeMap modes;
for (const auto& [name, mh] : ServerInstance->Modes.GetModes(mt))
{
CapabData::ModeData data;
data.letter = mh->GetModeChar();
data.name = mh->GetName(protocol < PROTO_INSPIRCD_5);
const auto* const pm = mh->IsPrefixMode();
if (pm)
{
data.type = "prefix";
data.prefixletter = pm->GetPrefix();
data.prefixrank = pm->GetPrefixRank();
}
else if (mh->IsListMode())
data.type = "list";
else if (mh->NeedsParam(true))
data.type = mh->NeedsParam(false) ? "param" : "param-set";
else
data.type = "simple";
modes.emplace(data.name, std::move(data));
}
return modes;
}
// Builds a list of the local modules with the specified property.
CapabData::ModuleMap BuildModuleList(ModuleFlags property, uint16_t protocol)
{
CapabData::ModuleMap modules;
for (const auto& [name, module] : ServerInstance->Modules.GetModules())
{
if (!(module->properties & property))
continue;
// Replace m_foo.dylib with foo
auto startpos = name.compare(0, 2, "m_", 2) ? 0 : 2;
auto endpos = name.length() - strlen(INSPIRCD_MODULE_EXT);
auto modname = name.substr(startpos, endpos - startpos);
if (protocol < PROTO_INSPIRCD_5)
{
// BEGIN COMPATIBILITY CODE
if (insp::casemapped_equals(modname, "sethost") || insp::casemapped_equals(modname, "setident") || insp::casemapped_equals(modname, "setname"))
{
// These modules were combined in v5.
modname.replace(0, 3, "chg");
}
else if (insp::casemapped_equals(modname, "setidle"))
{
// Not VF_OPTCOMMON in v4.
continue;
}
else if (insp::casemapped_equals(modname, "sacommands"))
{
// These modules were combined in v5.
modules["sajoin"] = modules["sakick"] = modules["sanick"] =
modules["sapart"] = modules["saquit"];
continue;
}
// END COMPATIBILITY CODE.
}
module->GetLinkData(modules[modname]);
}
return modules;
}
bool CompareCapabilities(const CapabData::CapabilityMap& remote, TreeSocket* ts,
CapabDiff& diff)
{
// For capabilities we only compare the common keys so we can add new
// tokens later without breaking compatibility.
for (const auto& [tname, tvalue] : BuildCapabilityList(ts))
{
auto it = remote.find(tname);
if (it != remote.end() && it->second != tvalue)
{
diff.config.emplace("", CapabDiff::Config {
.what = tname,
.local = tvalue,
.remote = it->second,
});
}
}
return diff;
}
// Compares the lists of extbans on a remote server to the local server.
bool CompareExtBans(std::optional<CapabData::ExtBanMap>& remote, CapabDiff& diff)
{
// If the remote didn't send an extban list then don't compare.
if (!remote)
return true;
auto local = BuildExtBanList();
for (const auto& [_, data] : *remote)
{
auto extbaniter = local.find(data.name);
if (extbaniter == local.end())
{
// Only exists on the remote server.
diff.localmissing.push_back(FMT::format("{} ({}:)", data.name, data.letter));
continue;
}
// Check that the extban config is the same.
if (extbaniter->second.letter != data.letter)
{
diff.config.emplace(data.name, CapabDiff::Config {
.what = "extban character",
.local = FMT::format("+{}", extbaniter->second.letter),
.remote = FMT::format("+{}", data.letter),
});
}
if (!insp::casemapped_equals(extbaniter->second.type, data.type))
{
diff.config.emplace(data.name, CapabDiff::Config {
.what = "extban type",
.local = extbaniter->second.type,
.remote = data.type,
});
}
local.erase(extbaniter);
}
for (const auto& [_, data] : local)
{
// Only exists on the local server.
diff.remotemissing.push_back(FMT::format("{} ({}:)", data.name, data.letter));
}
return diff;
}
// Compares the mode data sent by a remote server to that of the local server.
void CompareModeData(const CapabData::ModeData& data, const CapabData::ModeData& otherdata,
CapabDiff& diff)
{
if (data.letter != otherdata.letter)
{
diff.config.emplace(data.name, CapabDiff::Config {
.what = "mode character",
.local = FMT::format("+{}", data.letter),
.remote = FMT::format("+{}", otherdata.letter),
});
}
if (!insp::casemapped_equals(data.type, otherdata.type))
{
diff.config.emplace(data.name, CapabDiff::Config {
.what = "mode type",
.local = data.type,
.remote = otherdata.type,
});
}
else if (insp::casemapped_equals(data.type, "prefix"))
{
if (data.prefixletter != otherdata.prefixletter)
{
diff.config.emplace(data.name, CapabDiff::Config {
.what = "prefix character",
.local = data.prefixletter ? ConvToStr(data.prefixletter) : "",
.remote = otherdata.prefixletter ? ConvToStr(otherdata.prefixletter) : "",
});
}
if (data.prefixrank != otherdata.prefixrank)
{
diff.config.emplace(data.name, CapabDiff::Config {
.what = "prefix rank",
.local = ConvToStr(data.prefixrank),
.remote = ConvToStr(otherdata.prefixrank),
});
}
}
}
// Compares the lists of module on a remote server to the local server.
bool CompareModes(ModeType mt, std::optional<CapabData::ModeMap>& remote, uint16_t protocol,
CapabDiff& diff)
{
// If the remote didn't send a mode list then don't compare.
if (!remote)
return true;
auto local = BuildModeList(mt, protocol);
for (const auto& [_, data] : *remote)
{
auto modeiter = local.find(data.name);
if (modeiter == local.end())
{
// Only exists on the remote server.
diff.localmissing.push_back(FMT::format("{} (+{})", data.name, data.letter));
continue;
}
// Check that the mode config is the same.
CompareModeData(modeiter->second, data, diff);
local.erase(modeiter);
}
for (const auto& [_, data] : local)
{
// Only exists on the local server.
diff.remotemissing.push_back(FMT::format("{} (+{})", data.name, data.letter));
}
return diff;
}
// Compares the module data sent by a remote server to that of the local server.
void CompareModuleData(const ModulePtr& mod, const Module::LinkData& otherdata,
CapabDiff& diff)
{
Module::LinkDataDiff datadiff;
mod->CompareLinkData(otherdata, datadiff);
if (datadiff.empty())
return;
const auto modname = ModuleManager::ShrinkModName(mod->ModuleFile);
for (const auto& [key, values] : datadiff)
{
diff.config.emplace(modname, CapabDiff::Config {
.what = key,
.local = values.first,
.remote = values.second,
});
}
}
// Compares the lists of module on a remote server to the local server.
bool CompareModules(ModuleFlags property, std::optional<CapabData::ModuleMap>& remote,
CapabDiff& diff)
{
// If the remote didn't send a module list then don't compare.
if (!remote)
return true;
// Retrieve the local module list.
ModuleManager::ModuleMap local;
for (const auto& [name, module] : ServerInstance->Modules.GetModules())
{
if (module->properties & property)
local[ModuleManager::ShrinkModName(name)] = module;
}
for (const auto& [name, otherdata] : *remote)
{
auto moditer = local.find(name);
if (moditer == local.end())
{
// Only exists on the remote server.
diff.localmissing.push_back(name);
continue;
}
// Parse and compare the link data.
CompareModuleData(moditer->second, otherdata, diff);
local.erase(moditer);
}
for (const auto& [name, _] : local)
{
// Only exists on the local server.
diff.remotemissing.push_back(name);
}
return diff;
}
// Generates a capability list in the format "FOO=BAR BAZ=BAX".
std::string FormatCapabilities(TreeSocket* ts)
{
auto first = true;
std::stringstream capabilitystr;
for (const auto& [capkey, capvalue] : BuildCapabilityList(ts))
{
if (!first)
capabilitystr << ' ';
capabilitystr << capkey << '=' << capvalue;
first = false;
}
return capabilitystr.str();
}
// Generates an extban list in the format "acting:foo=a matching:bar=b".
std::string FormatExtBans()
{
std::ostringstream extbans;
for (const auto& [_, data] : BuildExtBanList())
{
extbans << data.type << ":" << data.name;
if (data.letter)
extbans << '=' << data.letter;
extbans << ' ';
}
return extbans.str();
}
// Generates a mode list in the format "simple:foo=b prefix:123:bar=c?".
std::string FormatModes(ModeType mt, uint16_t protocol)
{
std::ostringstream modes;
for (const auto& [_, data] : BuildModeList(mt, protocol))
{
modes << data.type << ':';
if (insp::casemapped_equals(data.type, "prefix"))
modes << data.prefixrank << ':';
modes << data.name << '=';
if (data.prefixletter)
modes << data.prefixletter;
modes << data.letter << ' ';
}
return modes.str();
}
// Generates a module list in the format "m_foo.so=bar m_bar.so=baz".
std::string FormatModules(ModuleFlags property, uint16_t protocol)
{
std::ostringstream modules;
for (const auto& [module, linkdata] : BuildModuleList(property, protocol))
{
modules << module;
if (!linkdata.empty())
modules << '=' << Percent::EncodeQuery(linkdata);
modules << ' ';
}
return modules.str();
}
void HandleDiff(TreeSocket* ts, const std::string& what, const CapabDiff& diff, bool fatal)
{
if (fatal)
{
ServerInstance->SNO.WriteToSnoMask('l', "CAPAB negotiation mismatch on link {}: {} do not match with the remote server. You will not be able to link this server until this issue is resolved.",
ts->GetLinkName(), what);
}
else
ServerInstance->SNO.WriteToSnoMask('l', "CAPAB negotiation mismatch on link {}: {} do not match with the remote server. Some functionality may behave inconsistently between servers.",
ts->GetLinkName(), what);
if (!diff.localmissing.empty())
ServerInstance->SNO.WriteToSnoMask('l', "Missing on the local server: {}", insp::join(diff.localmissing));
if (!diff.remotemissing.empty())
ServerInstance->SNO.WriteToSnoMask('l', "Missing on the remote server: {}", insp::join(diff.remotemissing));
if (!diff.config.empty())
{
ServerInstance->SNO.WriteToSnoMask('l', "Different config between the local and remote servers:");
for (const auto& [feature, confdiff] : diff.config)
{
const auto localstate = confdiff.local
? confdiff.local->empty() ? "set" : FMT::format("set to {}", *confdiff.local)
: "not set";
const auto remotestate = confdiff.remote
? confdiff.remote->empty() ? "set" : FMT::format("set to {}", *confdiff.remote)
: "not set";
ServerInstance->SNO.WriteToSnoMask('l', " {}{}{} {} on the local server and {} on the remote server.", feature, feature.empty() ? "" : ": ",
confdiff.what, localstate, remotestate);
}
}
}
template <typename... Args>
bool HandleCapabError(TreeSocket* ts, const char* format, Args&&... args)
{
const auto message = FMT::vformat(format, FMT::make_format_args(args...));
ts->SendError(FMT::format("CAPAB negotiation failed: {}. See the log on {} or snomasks +Ll for more details.",
message, ServerInstance->Config->ServerName));
return false;
}
// Handles a mismatch between servers during CAPAB negotiation.
bool HandleMismatch(TreeSocket* ts, const std::string& what, const CapabDiff& diff)
{
HandleDiff(ts, what, diff, !Utils->AllowMismatch);
if (!Utils->AllowMismatch)
return HandleCapabError(ts, "{} do not match and <spanningtree:allowmismatch> is not enabled", what);
return true;
}
// Handles a fatal mismatch between servers during CAPAB negotiation.
bool HandleMismatchFatal(TreeSocket* ts, const std::string& what, const CapabDiff& diff)
{
HandleDiff(ts, what, diff, true);
return HandleCapabError(ts, "{} do not match", what);
}
// Parses a capability list in the format "FOO BAR=baz".
void ParseCapabilities(const std::string& caplist, CapabData::CapabilityMap& map, TreeSocket* ts)
{
StringSplitter capstream(caplist);
for (std::string cap; capstream.GetToken(cap); )
{
std::string capval;
const auto split = cap.find('=');
if (split != std::string::npos)
{
capval.assign(cap, split + 1);
cap.erase(split);
}
// BEGIN COMPATIBILITY CODE
if (ts->proto_version < PROTO_INSPIRCD_5 && insp::casemapped_equals(cap, "CHALLENGE"))
{
ts->SetTheirChallenge(capval);
continue;
}
// END COMPATIBILITY CODE
ServerInstance->Logs.Debug(MODNAME, "Parsed capability: {} {}", cap, capval);
map.emplace(cap, capval);
}
}
// Parses a challenge in the format "<algo> [<algo>]+ :<challenge>".
void ParseChallenge(const CommandBase::Params& params, std::string& out)
{
for (const auto& algorithm : insp::iterator_range(params.begin() + 1, params.end() - 1))
{
// For now we only support HMAC-SHA-256 here.
if (insp::casemapped_equals(algorithm, "hmac-sha256"))
{
out = Percent::Decode(params.back());
ServerInstance->Logs.Debug(MODNAME, "Parsed challenge: {:?}", out);
break;
}
}
}
// Parses an extban list in the format "type:name[=char]".
void ParseExtBans(const std::string& extbanlist, std::optional<CapabData::ExtBanMap>& out)
{
auto& map = out ? *out : out.emplace();
StringSplitter extbanstream(extbanlist);
for (std::string extban; extbanstream.GetToken(extban); )
{
CapabData::ExtBanData data;
// matching:mute=m acting:noctcp
// A B A
const auto a = extban.find(':');
if (a == std::string::npos)
continue; // Malformed.
const auto b = extban.find('=', a + 1);
if (b == std::string::npos)
{
// ExtBan only has a name.
data.name = extban.substr(a + 1);
}
else
{
// ExtBan has a name and letter.
data.name = extban.substr(a + 1, b - a - 1);
data.letter = extban[b + 1];
}
data.type = extban.substr(0, a);
ServerInstance->Logs.Debug(MODNAME, "Parsed extban: type {} name {} letter {:?}",
data.type, data.name, data.letter);
map.emplace(data.name, std::move(data));
}
}
// Parses a mode list in the format "type:[rank:]name=[prefixchar][char]".
void ParseModes(const std::string& modelist, std::optional<CapabData::ModeMap>& out)
{
auto& map = out ? *out : out.emplace();
StringSplitter modestream(modelist);
for (std::string mode; modestream.GetToken(mode); )
{
CapabData::ModeData data;
// list:ban=b param-set:limit=l param:key=k prefix:30000:op=@o simple:noextmsg=n
// A C A C A C A B C A C
auto a = mode.find(':');
if (a == std::string::npos)
continue; // Malformed.
// If the mode is a prefix mode then it also has a rank.
data.type = mode.substr(0, a);
if (insp::casemapped_equals(data.type, "prefix"))
{
const auto b = mode.find(':', a + 1);
if (b == std::string::npos)
continue; // Malformed.
const auto rank = mode.substr(a + 1, b - a - 1);
data.prefixrank = ConvToNum<ModeHandler::Rank>(rank);
a = b;
}
const auto c = mode.find('=', a + 1);
if (c == std::string::npos)
continue; // Malformed.
data.name = mode.substr(a + 1, c - a - 1);
switch (mode.length() - c)
{
case 2:
data.letter = mode[c + 1];
break;
case 3:
data.prefixletter = mode[c + 1];
data.letter = mode[c + 2];
break;
default:
continue; // Malformed.
}
ServerInstance->Logs.Debug(MODNAME, "Parsed mode: type {} name {} letter {} prefixrank {} prefixletter {:?}",
data.type, data.name, data.letter, data.prefixrank, data.prefixletter);
map.emplace(data.name, std::move(data));
}
}
// Parses a module list in the format "m_foo.so=bar m_bar.so=baz" to a map.
void ParseModules(const std::string& modlist, std::optional<CapabData::ModuleMap>& out)
{
CapabData::ModuleMap& map = out ? *out : out.emplace();
StringSplitter modstream(modlist);
for (std::string mod; modstream.GetToken(mod); )
{
const auto split = mod.find('=');
if (split == std::string::npos)
map.emplace(mod, Module::LinkData()); // No link data.
else
{
const auto linkdata = Percent::DecodeQuery(mod.substr(split + 1));
map.emplace(mod.substr(0, split), linkdata);
}
}
}
}
void TreeSocket::SendCapabilities(int phase)
{
if (capab->capab_phase >= phase)
return;
if (capab->capab_phase < 1 && phase >= 1)
{
MessageBuilder("CAPAB", true)
.Push("START", (uint16_t)PROTO_NEWEST)
.Unicast(this);
}
capab->capab_phase = phase;
if (phase < 2)
return;
std::vector<std::string> algorithms;
if (proto_version >= PROTO_INSPIRCD_5)
{
std::vector<char> challenge(32);
ServerInstance->GenRandom(challenge.data(), challenge.size());
SetOurChallenge(std::string(challenge.begin(), challenge.end()));
MessageBuilder("CAPAB", true)
.Push("CHALLENGE")
.Push("hmac-sha256", Percent::Encode(GetOurChallenge()))
.Unicast(this);
}
MessageBuilder("CAPAB", true)
.Push("CAPABILITIES", FormatCapabilities(this))
.Unicast(this);
MessageBuilder("CAPAB", true)
.Push("MODULES", FormatModules(VF_COMMON, proto_version))
.Unicast(this);
MessageBuilder("CAPAB", true)
.Push("MODSUPPORT", FormatModules(VF_OPTCOMMON, proto_version))
.Unicast(this);
MessageBuilder("CAPAB", true)
.Push("CHANMODES", FormatModes(MODETYPE_CHANNEL, proto_version))
.Unicast(this);
MessageBuilder("CAPAB", true)
.Push("USERMODES", FormatModes(MODETYPE_USER, proto_version))
.Unicast(this);
MessageBuilder("CAPAB", true)
.Push("EXTBANS", FormatExtBans())
.Unicast(this);
MessageBuilder("CAPAB", true)
.Push("END")
.Unicast(this);
}
/* Isolate and return the elements that are different between two comma separated lists */
void TreeSocket::ListDifference(const std::string& one, const std::string& two, char sep,
std::string& mleft, std::string& mright)
{
std::set<std::string> values;
StringSplitter sepleft(one, sep);
StringSplitter sepright(two, sep);
std::string item;
while (sepleft.GetToken(item))
{
values.insert(item);
}
while (sepright.GetToken(item))
{
if (!values.erase(item))
{
mright.push_back(sep);
mright.append(item);
}
}
for (const auto& value : values)
{
mleft.push_back(sep);
mleft.append(value);
}
}
bool TreeSocket::Capab(const CommandBase::Params& params)
{
if (params.empty())
return HandleCapabError(this, "Remote server did not send a subcommand in CAPAB");
if (insp::casemapped_equals(params[0], "START"))
{
if (params.size() < 2)
return HandleCapabError(this, "Remote server did not send a protocol version in CAPAB START");
capab->capabilities.clear();
capab->channelmodes.reset();
capab->extbans.reset();
capab->optionalmodules.reset();
capab->requiredmodules.reset();
capab->usermodes.reset();
proto_version = ConvToNum<uint16_t>(params[1]);
if (proto_version < PROTO_OLDEST)
{
return HandleCapabError(this, "Remote server is using protocol version {} which is too old to link with this server (protocol versions {} to {} are supported)",
proto_version, (uint16_t)PROTO_OLDEST, (uint16_t)PROTO_NEWEST);
}
SendCapabilities(2);
}
else if (insp::casemapped_equals(params[0], "END"))
{
CapabDiff diff;
if (!CompareModules(VF_COMMON, this->capab->requiredmodules, diff))
return HandleMismatchFatal(this, "Required modules", diff);
else if (!CompareModes(MODETYPE_CHANNEL, this->capab->channelmodes, this->proto_version, diff))
return HandleMismatchFatal(this, "Channel modes", diff);
else if (!CompareModes(MODETYPE_USER, this->capab->usermodes, this->proto_version, diff))
return HandleMismatchFatal(this, "User modes", diff);
else if (!CompareModules(VF_OPTCOMMON, this->capab->optionalmodules, diff))
{
if (!HandleMismatch(this, "Optional modules", diff))
return false;
}
else if (!CompareCapabilities(this->capab->capabilities, this, diff))
{
if (!HandleMismatch(this, "Capabilities", diff))
return false;
}
else if (!CompareExtBans(this->capab->extbans, diff))
{
if (!HandleMismatch(this, "Extended bans", diff))
return false;
}
if (this->LinkState == CONNECTING)
{
this->SendCapabilities(2);
MessageBuilder("SERVER", true)
.Push(ServerInstance->Config->ServerName,
MakePass(capab->link->SendPass, capab->theirchallenge),
ServerInstance->Config->ServerId,
ServerInstance->Config->ServerDesc)
.Unicast(this);
}
}
else if (insp::casemapped_equals(params[0], "CHALLENGE"))
{
if (params.size() >= 3)
ParseChallenge(params, capab->theirchallenge);
}
else if (insp::casemapped_equals(params[0], "CAPABILITIES"))
{
if (params.size() >= 2)
ParseCapabilities(params[1], capab->capabilities, this);
}
else if (insp::casemapped_equals(params[0] , "MODULES"))
{
if (params.size() >= 2)
ParseModules(params[1], capab->requiredmodules);
}
else if (insp::casemapped_equals(params[0], "MODSUPPORT"))
{
if (params.size() >= 2)
ParseModules(params[1], capab->optionalmodules);
}
else if (insp::casemapped_equals(params[0], "CHANMODES"))
{
if (params.size() >= 2)
ParseModes(params[1], capab->channelmodes);
}
else if (insp::casemapped_equals(params[0], "USERMODES"))
{
if (params.size() >= 2)
ParseModes(params[1], capab->usermodes);
}
else if (insp::casemapped_equals(params[0], "EXTBANS"))
{
if (params.size() >= 2)
ParseExtBans(params[1], capab->extbans);
}
return true;
}
