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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "commands/cmd_whois.h"
#include "commands/cmd_stats.h"
#include "socket.h"
#include "wildcard.h"
#include "xline.h"
#include "transport.h"
#include "m_hash.h"
#include "socketengine.h"
#include "m_spanningtree/main.h"
#include "m_spanningtree/utils.h"
#include "m_spanningtree/treeserver.h"
#include "m_spanningtree/link.h"
#include "m_spanningtree/treesocket.h"
#include "m_spanningtree/resolvers.h"
#include "m_spanningtree/handshaketimer.h"
/* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h */
std::string TreeSocket::MyCapabilities()
{
std::vector<std::string> modlist = this->Instance->Modules->GetAllModuleNames(VF_COMMON);
std::string capabilities;
sort(modlist.begin(),modlist.end());
for (unsigned int i = 0; i < modlist.size(); i++)
{
if (i)
capabilities = capabilities + ",";
capabilities = capabilities + modlist[i];
}
return capabilities;
}
void TreeSocket::SendCapabilities()
{
if (sentcapab)
return;
sentcapab = true;
irc::commasepstream modulelist(MyCapabilities());
this->WriteLine("CAPAB START");
/* Send module names, split at 509 length */
std::string item;
std::string line = "CAPAB MODULES ";
while (modulelist.GetToken(item))
{
if (line.length() + item.length() + 1 > 509)
{
this->WriteLine(line);
line = "CAPAB MODULES ";
}
if (line != "CAPAB MODULES ")
line.append(",");
line.append(item);
}
if (line != "CAPAB MODULES ")
this->WriteLine(line);
int ip6 = 0;
int ip6support = 0;
#ifdef IPV6
ip6 = 1;
#endif
#ifdef SUPPORT_IP6LINKS
ip6support = 1;
#endif
std::string extra;
/* Do we have sha256 available? If so, we send a challenge */
if (Utils->ChallengeResponse && (Instance->Modules->Find("m_sha256.so")))
{
this->SetOurChallenge(RandString(20));
extra = " CHALLENGE=" + this->GetOurChallenge();
}
this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion)+extra+" PREFIX="+Instance->Modes->BuildPrefixes()+" CHANMODES="+Instance->Modes->ChanModes()+" SVSPART=1");
this->WriteLine("CAPAB END");
}
/* Check a comma seperated list for an item */
bool TreeSocket::HasItem(const std::string &list, const std::string &item)
{
irc::commasepstream seplist(list);
std::string item2;
while (seplist.GetToken(item2))
{
if (item2 == item)
return true;
}
return false;
}
/* Isolate and return the elements that are different between two comma seperated lists */
std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
{
irc::commasepstream list_one(one);
std::string item;
std::string result;
while (list_one.GetToken(item))
{
if (!HasItem(two, item))
{
result.append(" ");
result.append(item);
}
}
return result;
}
bool TreeSocket::Capab(const std::deque<std::string> ¶ms)
{
if (params.size() < 1)
{
this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
return false;
}
if (params[0] == "START")
{
this->ModuleList.clear();
this->CapKeys.clear();
}
else if (params[0] == "END")
{
std::string reason;
int ip6support = 0;
#ifdef SUPPORT_IP6LINKS
ip6support = 1;
#endif
/* Compare ModuleList and check CapKeys...
* Maybe this could be tidier? -- Brain
*/
if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
{
std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
if (!diff.length())
{
diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
}
else
{
diff = "this server:" + diff;
}
if (diff.length() == 12)
reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
else
reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
}
cap_validation valid_capab[] = {
{"Maximum nickname lengths differ or remote nickname length not specified", "NICKMAX", NICKMAX},
{"Maximum ident lengths differ or remote ident length not specified", "IDENTMAX", IDENTMAX},
{"Maximum channel lengths differ or remote channel length not specified", "CHANMAX", CHANMAX},
{"Maximum modes per line differ or remote modes per line not specified", "MAXMODES", MAXMODES},
{"Maximum quit lengths differ or remote quit length not specified", "MAXQUIT", MAXQUIT},
{"Maximum topic lengths differ or remote topic length not specified", "MAXTOPIC", MAXTOPIC},
{"Maximum kick lengths differ or remote kick length not specified", "MAXKICK", MAXKICK},
{"Maximum GECOS (fullname) lengths differ or remote GECOS length not specified", "MAXGECOS", MAXGECOS},
{"Maximum awaymessage lengths differ or remote awaymessage length not specified", "MAXAWAY", MAXAWAY},
{"", "", 0}
};
if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
reason = "We don't both support linking to IPV6 servers";
if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
{
if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
else
reason = "Protocol version not specified";
}
if(this->CapKeys.find("PREFIX") != this->CapKeys.end() && this->CapKeys.find("PREFIX")->second != this->Instance->Modes->BuildPrefixes())
reason = "One or more of the prefixes on the remote server are invalid on this server.";
if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
reason = "We don't both have halfop support enabled/disabled identically";
for (int x = 0; valid_capab[x].size; ++x)
{
if (((this->CapKeys.find(valid_capab[x].key) == this->CapKeys.end()) || ((this->CapKeys.find(valid_capab[x].key) != this->CapKeys.end()) &&
(this->CapKeys.find(valid_capab[x].key)->second != ConvToStr(valid_capab[x].size)))))
reason = valid_capab[x].reason;
}
/* Challenge response, store their challenge for our password */
std::map<std::string,std::string>::iterator n = this->CapKeys.find("CHALLENGE");
if (Utils->ChallengeResponse && (n != this->CapKeys.end()) && (Instance->Modules->Find("m_sha256.so")))
{
/* Challenge-response is on now */
this->SetTheirChallenge(n->second);
if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
{
this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(OutboundPass, this->GetTheirChallenge())+" 0 "+
Instance->Config->GetSID()+" :"+this->Instance->Config->ServerDesc);
}
}
else
{
/* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
if (this->LinkState == CONNECTING)
this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+OutboundPass+" 0 "+Instance->Config->GetSID()+" :"+this->Instance->Config->ServerDesc);
}
if (reason.length())
{
this->SendError("CAPAB negotiation failed: "+reason);
return false;
}
}
else if ((params[0] == "MODULES") && (params.size() == 2))
{
if (!this->ModuleList.length())
{
this->ModuleList.append(params[1]);
}
else
{
this->ModuleList.append(",");
this->ModuleList.append(params[1]);
}
}
else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
{
irc::tokenstream capabs(params[1]);
std::string item;
bool more = true;
while ((more = capabs.GetToken(item)))
{
/* Process each key/value pair */
std::string::size_type equals = item.rfind('=');
if (equals != std::string::npos)
{
std::string var = item.substr(0, equals);
std::string value = item.substr(equals+1, item.length());
CapKeys[var] = value;
}
}
}
return true;
}
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