/** Because most of the I/O gubbins are encapsulated within
* BufferedSocket, we just call the superclass constructor for
* most of the action, and append a few of our own values
* to it.
*/
TreeSocket::TreeSocket(SpanningTreeUtilities* Util, Link* link, Autoconnect* myac, const std::string& ipaddr)
: Utils(Util)
{
age = ServerInstance->Time();
linkID = assign(link->Name);
capab = new CapabData;
capab->link = link;
capab->ac = myac;
capab->capab_phase = 0;
MyRoot = NULL;
proto_version = 0;
ConnectionFailureShown = false;
LinkState = CONNECTING;
if (!link->Hook.empty())
{
ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, link->Hook);
if (!prov)
{
SetError("Could not find hook '" + link->Hook + "' for connection to " + linkID);
return;
}
AddIOHook(prov->creator);
}
DoConnect(ipaddr, link->Port, link->Timeout, link->Bind);
Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, link->Timeout);
SendCapabilities(1);
}
/** Constructor for incoming connections
*/
TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
: BufferedSocket(newfd)
, linkID("inbound from " + client->addr()), LinkState(WAIT_AUTH_1), MyRoot(NULL), proto_version(0)
, burstsent(false), age(ServerInstance->Time())
{
capab = new CapabData;
capab->capab_phase = 0;
for (ListenSocket::IOHookProvList::iterator i = via->iohookprovs.begin(); i != via->iohookprovs.end(); ++i)
{
ListenSocket::IOHookProvRef& iohookprovref = *i;
if (!iohookprovref)
continue;
iohookprovref->OnAccept(this, client, server);
// IOHook could have encountered a fatal error, e.g. if the TLS ClientHello was already in the queue and there was no common TLS version
if (!getError().empty())
{
TreeSocket::OnError(I_ERR_OTHER);
return;
}
}
SendCapabilities(1);
Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, 30);
}
/** Because most of the I/O gubbins are encapsulated within
* BufferedSocket, we just call the superclass constructor for
* most of the action, and append a few of our own values
* to it.
*/
TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const std::string& ipaddr)
: linkID(assign(link->Name)), LinkState(CONNECTING), MyRoot(NULL), proto_version(0), ConnectionFailureShown(false)
, age(ServerInstance->Time())
{
capab = new CapabData;
capab->link = link;
capab->ac = myac;
capab->capab_phase = 0;
DoConnect(ipaddr, link->Port, link->Timeout, link->Bind);
Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, link->Timeout);
SendCapabilities(1);
}
/** When a listening socket gives us a new file descriptor,
* we must associate it with a socket without creating a new
* connection. This constructor is used for this purpose.
*/
TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
: BufferedSocket(newfd)
, linkID("inbound from " + client->addr()), LinkState(WAIT_AUTH_1), MyRoot(NULL), proto_version(0)
, ConnectionFailureShown(false), age(ServerInstance->Time())
{
capab = new CapabData;
capab->capab_phase = 0;
if (via->iohookprov)
via->iohookprov->OnAccept(this, client, server);
SendCapabilities(1);
Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, 30);
}
/** When a listening socket gives us a new file descriptor,
* we must associate it with a socket without creating a new
* connection. This constructor is used for this purpose.
*/
TreeSocket::TreeSocket(SpanningTreeUtilities* Util, int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
: BufferedSocket(newfd), Utils(Util)
{
capab = new CapabData;
capab->capab_phase = 0;
MyRoot = NULL;
age = ServerInstance->Time();
LinkState = WAIT_AUTH_1;
proto_version = 0;
ConnectionFailureShown = false;
linkID = "inbound from " + client->addr();
FOREACH_MOD(I_OnHookIO, OnHookIO(this, via));
if (GetIOHook())
GetIOHook()->OnStreamSocketAccept(this, client, server);
SendCapabilities(1);
Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, 30);
}
/** Because most of the I/O gubbins are encapsulated within
* BufferedSocket, we just call the superclass constructor for
* most of the action, and append a few of our own values
* to it.
*/
TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const std::string& ipaddr)
: linkID(assign(link->Name)), LinkState(CONNECTING), MyRoot(NULL), proto_version(0), ConnectionFailureShown(false)
, age(ServerInstance->Time())
{
capab = new CapabData;
capab->link = link;
capab->ac = myac;
capab->capab_phase = 0;
if (!link->Hook.empty())
{
ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, link->Hook);
if (!prov)
{
SetError("Could not find hook '" + link->Hook + "' for connection to " + linkID);
return;
}
AddIOHook(static_cast<IOHook*>(prov));
}
DoConnect(ipaddr, link->Port, link->Timeout, link->Bind);
Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, link->Timeout);
SendCapabilities(1);
}
bool TreeSocket::Capab(const parameterlist ¶ms)
{
if (params.size() < 1)
{
this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
return false;
}
if (params[0] == "START")
{
capab->ModuleList.clear();
capab->OptModuleList.clear();
capab->CapKeys.clear();
if (params.size() > 1)
proto_version = atoi(params[1].c_str());
SendCapabilities(2);
}
else if (params[0] == "END")
{
std::string reason;
/* Compare ModuleList and check CapKeys */
if ((this->capab->ModuleList != this->MyModules(VF_COMMON)) && (this->capab->ModuleList.length()))
{
std::string diffIneed, diffUneed;
ListDifference(this->capab->ModuleList, this->MyModules(VF_COMMON), ' ', diffIneed, diffUneed);
if (diffIneed.length() || diffUneed.length())
{
reason = "Modules incorrectly matched on these servers.";
if (diffIneed.length())
reason += " Not loaded here:" + diffIneed;
if (diffUneed.length())
reason += " Not loaded there:" + diffUneed;
this->SendError("CAPAB negotiation failed: "+reason);
return false;
}
}
if (this->capab->OptModuleList != this->MyModules(VF_OPTCOMMON) && this->capab->OptModuleList.length())
{
std::string diffIneed, diffUneed;
ListDifference(this->capab->OptModuleList, this->MyModules(VF_OPTCOMMON), ' ', diffIneed, diffUneed);
if (diffIneed.length() || diffUneed.length())
{
if (Utils->AllowOptCommon)
{
ServerInstance->SNO->WriteToSnoMask('l',
"Optional module lists do not match, some commands may not work globally.%s%s%s%s",
diffIneed.length() ? " Not loaded here:" : "", diffIneed.c_str(),
diffUneed.length() ? " Not loaded there:" : "", diffUneed.c_str());
}
else
{
reason = "Optional modules incorrectly matched on these servers, and options::allowmismatch not set.";
if (diffIneed.length())
reason += " Not loaded here:" + diffIneed;
if (diffUneed.length())
reason += " Not loaded there:" + diffUneed;
this->SendError("CAPAB negotiation failed: "+reason);
return false;
}
}
}
if (this->capab->CapKeys.find("PROTOCOL") == this->capab->CapKeys.end())
{
reason = "Protocol version not specified";
}
else
{
proto_version = atoi(capab->CapKeys.find("PROTOCOL")->second.c_str());
if (proto_version < MinCompatProtocol)
{
reason = "Server is using protocol version " + ConvToStr(proto_version) +
" which is too old to link with this server (version " + ConvToStr(ProtocolVersion)
+ (ProtocolVersion != MinCompatProtocol ? ", links with " + ConvToStr(MinCompatProtocol) + " and above)" : ")");
}
}
if(this->capab->CapKeys.find("PREFIX") != this->capab->CapKeys.end() && this->capab->CapKeys.find("PREFIX")->second != ServerInstance->Modes->BuildPrefixes())
reason = "One or more of the prefixes on the remote server are invalid on this server.";
if (!capab->ChanModes.empty())
{
if (capab->ChanModes != BuildModeList(MODETYPE_CHANNEL))
{
std::string diffIneed, diffUneed;
ListDifference(capab->ChanModes, BuildModeList(MODETYPE_CHANNEL), ' ', diffIneed, diffUneed);
if (diffIneed.length() || diffUneed.length())
{
reason = "Channel modes not matched on these servers.";
if (diffIneed.length())
reason += " Not loaded here:" + diffIneed;
if (diffUneed.length())
reason += " Not loaded there:" + diffUneed;
}
}
}
else if (this->capab->CapKeys.find("CHANMODES") != this->capab->CapKeys.end())
{
if (this->capab->CapKeys.find("CHANMODES")->second != ServerInstance->Modes->GiveModeList(MASK_CHANNEL))
reason = "One or more of the channel modes on the remote server are invalid on this server.";
}
if (!capab->UserModes.empty())
{
if (capab->UserModes != BuildModeList(MODETYPE_USER))
{
std::string diffIneed, diffUneed;
ListDifference(capab->UserModes, BuildModeList(MODETYPE_USER), ' ', diffIneed, diffUneed);
if (diffIneed.length() || diffUneed.length())
{
reason = "User modes not matched on these servers.";
if (diffIneed.length())
reason += " Not loaded here:" + diffIneed;
if (diffUneed.length())
reason += " Not loaded there:" + diffUneed;
}
}
}
else if (this->capab->CapKeys.find("USERMODES") != this->capab->CapKeys.end())
{
if (this->capab->CapKeys.find("USERMODES")->second != ServerInstance->Modes->GiveModeList(MASK_USER))
reason = "One or more of the user modes on the remote server are invalid on this server.";
}
/* Challenge response, store their challenge for our password */
std::map<std::string,std::string>::iterator n = this->capab->CapKeys.find("CHALLENGE");
if (Utils->ChallengeResponse && (n != this->capab->CapKeys.end()) && (ServerInstance->Modules->Find("m_sha256.so")))
{
/* Challenge-response is on now */
this->SetTheirChallenge(n->second);
if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
{
this->SendCapabilities(2);
this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+this->MakePass(capab->link->SendPass, capab->theirchallenge)+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
}
}
else
{
/* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
if (this->LinkState == CONNECTING)
{
this->SendCapabilities(2);
this->WriteLine("SERVER "+ServerInstance->Config->ServerName+" "+capab->link->SendPass+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
}
}
if (reason.length())
{
this->SendError("CAPAB negotiation failed: "+reason);
return false;
}
}
else if ((params[0] == "MODULES") && (params.size() == 2))
{
if (!capab->ModuleList.length())
{
capab->ModuleList = params[1];
}
else
{
capab->ModuleList.push_back(' ');
capab->ModuleList.append(params[1]);
}
}
else if ((params[0] == "MODSUPPORT") && (params.size() == 2))
{
if (!capab->OptModuleList.length())
{
capab->OptModuleList = params[1];
}
else
{
capab->OptModuleList.push_back(' ');
capab->OptModuleList.append(params[1]);
}
}
else if ((params[0] == "CHANMODES") && (params.size() == 2))
{
capab->ChanModes = params[1];
}
else if ((params[0] == "USERMODES") && (params.size() == 2))
{
capab->UserModes = params[1];
}
else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
{
irc::tokenstream capabs(params[1]);
std::string item;
while (capabs.GetToken(item))
{
/* Process each key/value pair */
std::string::size_type equals = item.find('=');
if (equals != std::string::npos)
{
std::string var = item.substr(0, equals);
std::string value = item.substr(equals+1, item.length());
capab->CapKeys[var] = value;
}
}
}
return true;
}
