-/* +------------------------------------+\r * | Inspire Internet Relay Chat Daemon |\r * +------------------------------------+\r *\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team\r * See: http://www.inspircd.org/wiki/index.php/Credits\r *\r * This program is free but copyrighted software; see\r * the file COPYING for details.\r *\r * ---------------------------------------------------\r */\r\r#include "inspircd.h"\r#include "users.h"\r#include "channels.h"\r#include "modules.h"\r#include "m_hash.h"\r\r/* $ModDesc: Provides masking of user hostnames */\r/* $ModDep: m_hash.h */\r\r/* Used to vary the output a little more depending on the cloak keys */\rstatic const char* xtab[] = {"F92E45D871BCA630", "A1B9D80C72E653F4", "1ABC078934DEF562", "ABCDEF5678901234"};\r\r/** Handles user mode +x\r */\rclass CloakUser : public ModeHandler\r{\r \r std::string prefix;\r unsigned int key1;\r unsigned int key2;\r unsigned int key3;\r unsigned int key4;\r Module* Sender;\r Module* HashProvider;\r\r /** This function takes a domain name string and returns just the last two domain parts,\r * or the last domain part if only two are available. Failing that it just returns what it was given.\r *\r * For example, if it is passed "svn.inspircd.org" it will return ".inspircd.org".\r * If it is passed "brainbox.winbot.co.uk" it will return ".co.uk",\r * and if it is passed "localhost.localdomain" it will return ".localdomain".\r * \r * This is used to ensure a significant part of the host is always cloaked (see Bug #216)\r */\r std::string LastTwoDomainParts(const std::string &host)\r {\r int dots = 0;\r std::string::size_type splitdot = host.length();\r\r for (std::string::size_type x = host.length() - 1; x; --x)\r {\r if (host[x] == '.')\r {\r splitdot = x;\r dots++;\r }\r if (dots >= 3)\r break;\r }\r\r if (splitdot == host.length())\r return host;\r else\r return host.substr(splitdot);\r }\r \r public:\r CloakUser(InspIRCd* Instance, Module* Source, Module* Hash) : ModeHandler(Instance, 'x', 0, 0, false, MODETYPE_USER, false), Sender(Source), HashProvider(Hash)\r {\r }\r\r ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)\r {\r if (source != dest)\r return MODEACTION_DENY;\r\r /* For remote clients, we dont take any action, we just allow it.\r * The local server where they are will set their cloak instead.\r */\r if (!IS_LOCAL(dest))\r return MODEACTION_ALLOW;\r\r if (adding)\r {\r if(!dest->IsModeSet('x'))\r {\r /* The mode is being turned on - so attempt to\r * allocate the user a cloaked host using a non-reversible\r * algorithm (its simple, but its non-reversible so the\r * simplicity doesnt really matter). This algorithm\r * will not work if the user has only one level of domain\r * naming in their hostname (e.g. if they are on a lan or\r * are connecting via localhost) -- this doesnt matter much.\r */\r\r char* n1 = strchr(dest->host,'.');\r char* n2 = strchr(dest->host,':');\r \r if (n1 || n2)\r {\r /* InspIRCd users have two hostnames; A displayed\r * hostname which can be modified by modules (e.g.\r * to create vhosts, implement chghost, etc) and a\r * 'real' hostname which you shouldnt write to.\r */\r\r unsigned int iv[] = { key1, key2, key3, key4 };\r std::string a = LastTwoDomainParts(dest->host);\r std::string b;\r\r /** Reset the Hash module, and send it our IV and hex table */\r HashResetRequest(Sender, HashProvider).Send();\r HashKeyRequest(Sender, HashProvider, iv).Send();\r HashHexRequest(Sender, HashProvider, xtab[(*dest->host) % 4]);\r\r /* Generate a cloak using specialized Hash */\r std::string hostcloak = prefix + "-" + std::string(HashSumRequest(Sender, HashProvider, dest->host).Send()).substr(0,8) + a;\r\r /* Fix by brain - if the cloaked host is > the max length of a host (64 bytes\r * according to the DNS RFC) then tough titty, they get cloaked as an IP. \r * Their ISP shouldnt go to town on subdomains, or they shouldnt have a kiddie\r * vhost.\r */\r#ifdef IPV6\r in6_addr testaddr;\r in_addr testaddr2;\r if ((dest->GetProtocolFamily() == AF_INET6) && (inet_pton(AF_INET6,dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))\r /* Invalid ipv6 address, and ipv6 user (resolved host) */\r b = hostcloak;\r else if ((dest->GetProtocolFamily() == AF_INET) && (inet_aton(dest->host,&testaddr2) < 1) && (hostcloak.length() <= 64))\r /* Invalid ipv4 address, and ipv4 user (resolved host) */\r b = hostcloak;\r else\r /* Valid ipv6 or ipv4 address (not resolved) ipv4 or ipv6 user */\r b = ((!strchr(dest->host,':')) ? Cloak4(dest->host) : Cloak6(dest->host));\r#else\r in_addr testaddr;\r if ((inet_aton(dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))\r /* Invalid ipv4 address, and ipv4 user (resolved host) */\r b = hostcloak;\r else\r /* Valid ipv4 address (not resolved) ipv4 user */\r b = Cloak4(dest->host);\r#endif\r\r dest->ChangeDisplayedHost(b.c_str());\r }\r \r dest->SetMode('x',true);\r return MODEACTION_ALLOW;\r }\r }\r else\r {\r if (dest->IsModeSet('x'))\r {\r /* User is removing the mode, so just restore their real host\r * and make it match the displayed one.\r */\r dest->ChangeDisplayedHost(dest->host);\r dest->SetMode('x',false);\r return MODEACTION_ALLOW;\r }\r }\r\r return MODEACTION_DENY;\r }\r\r std::string Cloak4(const char* ip)\r {\r unsigned int iv[] = { key1, key2, key3, key4 };\r irc::sepstream seps(ip, '.');\r std::string ra[4];;\r std::string octet[4];\r int i[4];\r\r for (int j = 0; j < 4; j++)\r {\r octet[j] = seps.GetToken();\r i[j] = atoi(octet[j].c_str());\r }\r\r octet[3] = octet[0] + "." + octet[1] + "." + octet[2] + "." + octet[3];\r octet[2] = octet[0] + "." + octet[1] + "." + octet[2];\r octet[1] = octet[0] + "." + octet[1];\r\r /* Reset the Hash module and send it our IV */\r HashResetRequest(Sender, HashProvider).Send();\r HashKeyRequest(Sender, HashProvider, iv).Send();\r\r /* Send the Hash module a different hex table for each octet group's Hash sum */\r for (int k = 0; k < 4; k++)\r {\r HashHexRequest(Sender, HashProvider, xtab[(iv[k]+i[k]) % 4]).Send();\r ra[k] = std::string(HashSumRequest(Sender, HashProvider, octet[k]).Send()).substr(0,6);\r }\r /* Stick them all together */\r return std::string().append(ra[0]).append(".").append(ra[1]).append(".").append(ra[2]).append(".").append(ra[3]);\r }\r\r std::string Cloak6(const char* ip)\r {\r /* Theyre using 4in6 (YUCK). Translate as ipv4 cloak */\r if (!strncmp(ip, "0::ffff:", 8))\r return Cloak4(ip + 8);\r\r /* If we get here, yes it really is an ipv6 ip */\r unsigned int iv[] = { key1, key2, key3, key4 };\r std::vector<std::string> hashies;\r std::string item;\r int rounds = 0;\r\r /* Reset the Hash module and send it our IV */\r HashResetRequest(Sender, HashProvider).Send();\r HashKeyRequest(Sender, HashProvider, iv).Send();\r\r for (const char* input = ip; *input; input++)\r {\r item += *input;\r if (item.length() > 7)\r {\r /* Send the Hash module a different hex table for each octet group's Hash sum */\r HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();\r hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));\r item.clear();\r }\r rounds++;\r }\r if (!item.empty())\r {\r /* Send the Hash module a different hex table for each octet group's Hash sum */\r HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();\r hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));\r item.clear();\r }\r /* Stick them all together */\r return irc::stringjoiner(":", hashies, 0, hashies.size() - 1).GetJoined();\r }\r \r void DoRehash()\r {\r ConfigReader Conf(ServerInstance);\r key1 = key2 = key3 = key4 = 0;\r key1 = Conf.ReadInteger("cloak","key1",0,true);\r key2 = Conf.ReadInteger("cloak","key2",0,true);\r key3 = Conf.ReadInteger("cloak","key3",0,true);\r key4 = Conf.ReadInteger("cloak","key4",0,true);\r prefix = Conf.ReadValue("cloak","prefix",0);\r\r if (prefix.empty())\r prefix = ServerInstance->Config->Network;\r\r if (!key1 && !key2 && !key3 && !key4)\r throw ModuleException("You have not defined cloak keys for m_cloaking!!! THIS IS INSECURE AND SHOULD BE CHECKED!");\r }\r};\r\r\rclass ModuleCloaking : public Module\r{\r private:\r \r CloakUser* cu;\r Module* HashModule;\r\r public:\r ModuleCloaking(InspIRCd* Me)\r : Module(Me)\r {\r ServerInstance->UseInterface("HashRequest");\r\r /* Attempt to locate the md5 service provider, bail if we can't find it */\r HashModule = ServerInstance->FindModule("m_md5.so");\r if (!HashModule)\r throw ModuleException("Can't find m_md5.so. Please load m_md5.so before m_cloaking.so.");\r\r /* Create new mode handler object */\r cu = new CloakUser(ServerInstance, this, HashModule);\r\r /* Register it with the core */ \r if (!ServerInstance->AddMode(cu, 'x'))\r throw ModuleException("Could not add new modes!");\r\r OnRehash(NULL,"");\r }\r \r virtual ~ModuleCloaking()\r {\r ServerInstance->Modes->DelMode(cu);\r DELETE(cu);\r ServerInstance->DoneWithInterface("HashRequest");\r }\r \r virtual Version GetVersion()\r {\r // returns the version number of the module to be\r // listed in /MODULES\r return Version(1,1,0,2,VF_COMMON|VF_VENDOR,API_VERSION);\r }\r\r virtual void OnRehash(userrec* user, const std::string ¶meter)\r {\r cu->DoRehash();\r }\r\r void Implements(char* List)\r {\r List[I_OnRehash] = 1;\r }\r};\r\rMODULE_INIT(ModuleCloaking)\r
\ No newline at end of file
+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
+ *
+ * This program is free but copyrighted software; see
+ * the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include "m_hash.h"
+
+/* $ModDesc: Provides masking of user hostnames */
+/* $ModDep: m_hash.h */
+
+/** Handles user mode +x
+ */
+class CloakUser : public ModeHandler
+{
+ public:
+ std::string prefix;
+ unsigned int key1;
+ unsigned int key2;
+ unsigned int key3;
+ unsigned int key4;
+ bool ipalways;
+ Module* Sender;
+ Module* HashProvider;
+ const char *xtab[4];
+
+ /** This function takes a domain name string and returns just the last two domain parts,
+ * or the last domain part if only two are available. Failing that it just returns what it was given.
+ *
+ * For example, if it is passed "svn.inspircd.org" it will return ".inspircd.org".
+ * If it is passed "brainbox.winbot.co.uk" it will return ".co.uk",
+ * and if it is passed "localhost.localdomain" it will return ".localdomain".
+ *
+ * This is used to ensure a significant part of the host is always cloaked (see Bug #216)
+ */
+ std::string LastTwoDomainParts(const std::string &host)
+ {
+ int dots = 0;
+ std::string::size_type splitdot = host.length();
+
+ for (std::string::size_type x = host.length() - 1; x; --x)
+ {
+ if (host[x] == '.')
+ {
+ splitdot = x;
+ dots++;
+ }
+ if (dots >= 3)
+ break;
+ }
+
+ if (splitdot == host.length())
+ return host;
+ else
+ return host.substr(splitdot);
+ }
+
+ CloakUser(InspIRCd* Instance, Module* source, Module* Hash) : ModeHandler(Instance, 'x', 0, 0, false, MODETYPE_USER, false), Sender(source), HashProvider(Hash)
+ {
+ }
+
+ ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool)
+ {
+ /* For remote clients, we dont take any action, we just allow it.
+ * The local server where they are will set their cloak instead.
+ * This is fine, as we will recieve it later.
+ */
+ if (!IS_LOCAL(dest))
+ {
+ dest->SetMode('x',adding);
+ return MODEACTION_ALLOW;
+ }
+
+ /* don't allow this user to spam modechanges */
+ dest->IncreasePenalty(5);
+
+ if (adding)
+ {
+ if(!dest->IsModeSet('x'))
+ {
+ /* The mode is being turned on - so attempt to
+ * allocate the user a cloaked host using a non-reversible
+ * algorithm (its simple, but its non-reversible so the
+ * simplicity doesnt really matter). This algorithm
+ * will not work if the user has only one level of domain
+ * naming in their hostname (e.g. if they are on a lan or
+ * are connecting via localhost) -- this doesnt matter much.
+ */
+
+ std::string* cloak;
+
+ if (!dest->GetExt("cloaked_host", cloak))
+ {
+ /* Force creation of missing cloak */
+ Sender->OnUserConnect(dest);
+ }
+ if (dest->GetExt("cloaked_host", cloak))
+ {
+ dest->ChangeDisplayedHost(cloak->c_str());
+ dest->SetMode('x',true);
+ return MODEACTION_ALLOW;
+ }
+ }
+ }
+ else
+ {
+ if (dest->IsModeSet('x'))
+ {
+ /* User is removing the mode, so just restore their real host
+ * and make it match the displayed one.
+ */
+ dest->ChangeDisplayedHost(dest->host.c_str());
+ dest->SetMode('x',false);
+ return MODEACTION_ALLOW;
+ }
+ }
+
+ return MODEACTION_DENY;
+ }
+
+ std::string Cloak4(const char* ip)
+ {
+ unsigned int iv[] = { key1, key2, key3, key4 };
+ irc::sepstream seps(ip, '.');
+ std::string ra[4];;
+ std::string octet[4];
+ int i[4];
+
+ for (int j = 0; j < 4; j++)
+ {
+ seps.GetToken(octet[j]);
+ i[j] = atoi(octet[j].c_str());
+ }
+
+ octet[3] = octet[0] + "." + octet[1] + "." + octet[2] + "." + octet[3];
+ octet[2] = octet[0] + "." + octet[1] + "." + octet[2];
+ octet[1] = octet[0] + "." + octet[1];
+
+ /* Reset the Hash module and send it our IV */
+ HashResetRequest(Sender, HashProvider).Send();
+ HashKeyRequest(Sender, HashProvider, iv).Send();
+
+ /* Send the Hash module a different hex table for each octet group's Hash sum */
+ for (int k = 0; k < 4; k++)
+ {
+ HashHexRequest(Sender, HashProvider, xtab[(iv[k]+i[k]) % 4]).Send();
+ ra[k] = std::string(HashSumRequest(Sender, HashProvider, octet[k]).Send()).substr(0,6);
+ }
+ /* Stick them all together */
+ return std::string().append(ra[0]).append(".").append(ra[1]).append(".").append(ra[2]).append(".").append(ra[3]);
+ }
+
+ std::string Cloak6(const char* ip)
+ {
+ unsigned int iv[] = { key1, key2, key3, key4 };
+ std::vector<std::string> hashies;
+ std::string item;
+ int rounds = 0;
+
+ /* Reset the Hash module and send it our IV */
+ HashResetRequest(Sender, HashProvider).Send();
+ HashKeyRequest(Sender, HashProvider, iv).Send();
+
+ for (const char* input = ip; *input; input++)
+ {
+ item += *input;
+ if (item.length() > 7)
+ {
+ /* Send the Hash module a different hex table for each octet group's Hash sum */
+ HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();
+ hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));
+ item.clear();
+ }
+ rounds++;
+ }
+ if (!item.empty())
+ {
+ /* Send the Hash module a different hex table for each octet group's Hash sum */
+ HashHexRequest(Sender, HashProvider, xtab[(key1+rounds) % 4]).Send();
+ hashies.push_back(std::string(HashSumRequest(Sender, HashProvider, item).Send()).substr(0,8));
+ item.clear();
+ }
+ /* Stick them all together */
+ return irc::stringjoiner(":", hashies, 0, hashies.size() - 1).GetJoined();
+ }
+
+ void DoRehash()
+ {
+ ConfigReader Conf(ServerInstance);
+ bool lowercase;
+
+ /* These are *not* using the need_positive parameter of ReadInteger -
+ * that will limit the valid values to only the positive values in a
+ * signed int. Instead, accept any value that fits into an int and
+ * cast it to an unsigned int. That will, a bit oddly, give us the full
+ * spectrum of an unsigned integer. - Special */
+ key1 = key2 = key3 = key4 = 0;
+ key1 = (unsigned int) Conf.ReadInteger("cloak","key1",0,false);
+ key2 = (unsigned int) Conf.ReadInteger("cloak","key2",0,false);
+ key3 = (unsigned int) Conf.ReadInteger("cloak","key3",0,false);
+ key4 = (unsigned int) Conf.ReadInteger("cloak","key4",0,false);
+ prefix = Conf.ReadValue("cloak","prefix",0);
+ ipalways = Conf.ReadFlag("cloak", "ipalways", 0);
+ lowercase = Conf.ReadFlag("cloak", "lowercase", 0);
+
+ if (!lowercase)
+ {
+ xtab[0] = "F92E45D871BCA630";
+ xtab[1] = "A1B9D80C72E653F4";
+ xtab[2] = "1ABC078934DEF562";
+ xtab[3] = "ABCDEF5678901234";
+ }
+ else
+ {
+ xtab[0] = "f92e45d871bca630";
+ xtab[1] = "a1b9d80c72e653f4";
+ xtab[2] = "1abc078934def562";
+ xtab[3] = "abcdef5678901234";
+ }
+
+ if (prefix.empty())
+ prefix = ServerInstance->Config->Network;
+
+ if (!key1 || !key2 || !key3 || !key4)
+ {
+ std::string detail;
+ if (!key1)
+ detail = "<cloak:key1> is not valid, it may be set to a too high/low value, or it may not exist.";
+ else if (!key2)
+ detail = "<cloak:key2> is not valid, it may be set to a too high/low value, or it may not exist.";
+ else if (!key3)
+ detail = "<cloak:key3> is not valid, it may be set to a too high/low value, or it may not exist.";
+ else if (!key4)
+ detail = "<cloak:key4> is not valid, it may be set to a too high/low value, or it may not exist.";
+
+ throw ModuleException("You have not defined cloak keys for m_cloaking!!! THIS IS INSECURE AND SHOULD BE CHECKED! - " + detail);
+ }
+ }
+};
+
+
+class ModuleCloaking : public Module
+{
+ private:
+
+ CloakUser* cu;
+ Module* HashModule;
+
+ public:
+ ModuleCloaking(InspIRCd* Me)
+ : Module(Me)
+ {
+ /* Attempt to locate the md5 service provider, bail if we can't find it */
+ HashModule = ServerInstance->Modules->Find("m_md5.so");
+ if (!HashModule)
+ throw ModuleException("Can't find m_md5.so. Please load m_md5.so before m_cloaking.so.");
+
+ cu = new CloakUser(ServerInstance, this, HashModule);
+
+ try
+ {
+ OnRehash(NULL);
+ }
+ catch (ModuleException &e)
+ {
+ delete cu;
+ throw e;
+ }
+
+ /* Register it with the core */
+ if (!ServerInstance->Modes->AddMode(cu))
+ {
+ delete cu;
+ throw ModuleException("Could not add new modes!");
+ }
+
+ ServerInstance->Modules->UseInterface("HashRequest");
+
+ Implementation eventlist[] = { I_OnRehash, I_OnUserDisconnect, I_OnCleanup, I_OnCheckBan, I_OnUserConnect, I_OnSyncUserMetaData, I_OnCleanup };
+ ServerInstance->Modules->Attach(eventlist, this, 6);
+
+ CloakExistingUsers();
+ }
+
+ void OnSyncUserMetaData(User* user, Module* proto,void* opaque, const std::string &extname, bool displayable)
+ {
+ if ((displayable) && (extname == "cloaked_host"))
+ {
+ std::string* cloak;
+ if (user->GetExt("cloaked_host", cloak))
+ proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, *cloak);
+ }
+ }
+
+ void CloakExistingUsers()
+ {
+ std::string* cloak;
+ for (std::vector<User*>::iterator u = ServerInstance->Users->local_users.begin(); u != ServerInstance->Users->local_users.end(); u++)
+ {
+ if (!(*u)->GetExt("cloaked_host", cloak))
+ {
+ OnUserConnect(*u);
+ }
+ }
+ }
+
+ virtual int OnCheckBan(User* user, Channel* chan)
+ {
+ char mask[MAXBUF];
+ std::string* tofree;
+ /* Check if they have a cloaked host, but are not using it */
+ if (user->GetExt("cloaked_host", tofree) && *tofree != user->dhost)
+ {
+ snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), tofree->c_str());
+ for (BanList::iterator i = chan->bans.begin(); i != chan->bans.end(); i++)
+ {
+ if (InspIRCd::Match(mask,i->data))
+ return -1;
+ }
+ }
+ return 0;
+ }
+
+ void Prioritize()
+ {
+ /* Needs to be after m_banexception etc. */
+ ServerInstance->Modules->SetPriority(this, I_OnCheckBan, PRIORITY_LAST);
+
+ /* but before m_conn_umodes, so host is generated ready to apply */
+ Module *um = ServerInstance->Modules->Find("m_conn_umodes.so");
+ ServerInstance->Modules->SetPriority(this, I_OnUserConnect, PRIORITY_AFTER, &um);
+ }
+
+ virtual void OnUserDisconnect(User* user)
+ {
+ std::string* tofree;
+ if (user->GetExt("cloaked_host", tofree))
+ {
+ delete tofree;
+ user->Shrink("cloaked_host");
+ }
+ }
+
+ virtual void OnCleanup(int target_type, void* item)
+ {
+ if (target_type == TYPE_USER)
+ OnUserDisconnect((User*)item);
+ }
+
+ virtual ~ModuleCloaking()
+ {
+ ServerInstance->Modes->DelMode(cu);
+ delete cu;
+ ServerInstance->Modules->DoneWithInterface("HashRequest");
+ }
+
+ virtual Version GetVersion()
+ {
+ // returns the version number of the module to be
+ // listed in /MODULES
+ return Version("$Id$", VF_COMMON|VF_VENDOR,API_VERSION);
+ }
+
+ virtual void OnRehash(User* user)
+ {
+ cu->DoRehash();
+ }
+
+ virtual void OnUserConnect(User* dest)
+ {
+ std::string* tofree;
+ if (dest->GetExt("cloaked_host", tofree))
+ return;
+
+ if (dest->host.find('.') != std::string::npos || dest->host.find(':') != std::string::npos)
+ {
+ unsigned int iv[] = { cu->key1, cu->key2, cu->key3, cu->key4 };
+ std::string a = cu->LastTwoDomainParts(dest->host);
+ std::string b;
+
+ /* InspIRCd users have two hostnames; A displayed
+ * hostname which can be modified by modules (e.g.
+ * to create vhosts, implement chghost, etc) and a
+ * 'real' hostname which you shouldnt write to.
+ */
+
+ /* 2008/08/18: add <cloak:ipalways> which always cloaks
+ * the IP, for anonymity. --nenolod
+ */
+ if (!cu->ipalways)
+ {
+ /** Reset the Hash module, and send it our IV and hex table */
+ HashResetRequest(this, cu->HashProvider).Send();
+ HashKeyRequest(this, cu->HashProvider, iv).Send();
+ HashHexRequest(this, cu->HashProvider, cu->xtab[(dest->host[0]) % 4]);
+
+ /* Generate a cloak using specialized Hash */
+ std::string hostcloak = cu->prefix + "-" + std::string(HashSumRequest(this, cu->HashProvider, dest->host.c_str()).Send()).substr(0,8) + a;
+
+ /* Fix by brain - if the cloaked host is > the max length of a host (64 bytes
+ * according to the DNS RFC) then tough titty, they get cloaked as an IP.
+ * Their ISP shouldnt go to town on subdomains, or they shouldnt have a kiddie
+ * vhost.
+ */
+#ifdef IPV6
+ in6_addr testaddr;
+ in_addr testaddr2;
+ if ((dest->GetProtocolFamily() == AF_INET6) && (inet_pton(AF_INET6,dest->host.c_str(),&testaddr) < 1) && (hostcloak.length() <= 64))
+ /* Invalid ipv6 address, and ipv6 user (resolved host) */
+ b = hostcloak;
+ else if ((dest->GetProtocolFamily() == AF_INET) && (inet_aton(dest->host.c_str(),&testaddr2) < 1) && (hostcloak.length() <= 64))
+ /* Invalid ipv4 address, and ipv4 user (resolved host) */
+ b = hostcloak;
+ else
+ /* Valid ipv6 or ipv4 address (not resolved) ipv4 or ipv6 user */
+ b = ((!strchr(dest->host.c_str(),':')) ? cu->Cloak4(dest->host.c_str()) : cu->Cloak6(dest->host.c_str()));
+#else
+ in_addr testaddr;
+ if ((inet_aton(dest->host.c_str(),&testaddr) < 1) && (hostcloak.length() <= 64))
+ /* Invalid ipv4 address, and ipv4 user (resolved host) */
+ b = hostcloak;
+ else
+ /* Valid ipv4 address (not resolved) ipv4 user */
+ b = cu->Cloak4(dest->host.c_str());
+#endif
+ }
+ else
+ {
+#ifdef IPV6
+ if (dest->GetProtocolFamily() == AF_INET6)
+ b = cu->Cloak6(dest->GetIPString());
+#endif
+ if (dest->GetProtocolFamily() == AF_INET)
+ b = cu->Cloak4(dest->GetIPString());
+ }
+
+ dest->Extend("cloaked_host", new std::string(b));
+ }
+ }
+
+};
+
+MODULE_INIT(ModuleCloaking)