-#include <stdio.h>
+// Hostname cloaking (+x mode) module for inspircd.
+// version 1.0.0.1 by brain (C. J. Edwards) Mar 2004.
+//
+// When loaded this module will automatically set the
+// +x mode on all connecting clients.
+//
+// Setting +x on a client causes the module to change the
+// dhost entry (displayed host) for each user who has the
+// mode, cloaking their host. Unlike unreal, the algorithm
+// is non-reversible as uncloaked hosts are passed along
+// the server->server link, and all encoding of hosts is
+// done locally on the server by this module.
+#include <stdio.h>
#include "users.h"
#include "channels.h"
#include "modules.h"
public:
ModuleCloaking()
{
+ // We must create an instance of the Server class to work with
Srv = new Server;
+
+ // we must create a new mode. Set the parameters so the
+ // mode doesn't require oper, and is a client usermode
+ // with no parameters (actually, you cant have params for a umode!)
+ if (!Srv->AddExtendedMode('x',MT_CLIENT,false,0,0))
+ {
+ // we couldn't claim mode x... possibly anther module has it,
+ // this might become likely to happen if there are a lot of 3rd
+ // party modules around in the future -- any 3rd party modules
+ // SHOULD implement a system of configurable mode letters (e.g.
+ // from a config file)
+ Srv->Log(DEFAULT,"*** m_cloaking: ERROR, failed to allocate user mode +x!");
+ printf("Could not claim usermode +x for this module!");
+ exit(0);
+ }
}
virtual ~ModuleCloaking()
{
+ // not really neccessary, but free it anyway
delete Srv;
}
virtual Version GetVersion()
{
- return Version(1,0,0,0);
+ // returns the version number of the module to be
+ // listed in /MODULES
+ return Version(1,0,0,1);
}
- virtual void OnUserConnect(userrec* user)
+ virtual bool OnExtendedMode(userrec* user, chanrec* chan, char modechar, int type, bool mode_on, string_list ¶ms)
{
- if (strstr(user->dhost,"."))
+ // this method is called for any extended mode character.
+ // all module modes for all modules pass through here
+ // (unless another module further up the chain claims them)
+ // so we must be VERY careful to only act upon modes which
+ // we have claimed ourselves. This is a feature to allow
+ // modules to 'spy' on extended mode activity if they so wish.
+ if ((modechar == 'x') && (type == MT_CLIENT))
+ {
+ // we've now determined that this is our mode character...
+ // is the user adding the mode to their list or removing it?
+ if (mode_on)
+ {
+ // 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.
+ if (strstr(user->host,"."))
+ {
+ // in 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.
+ std::string a = strstr(user->host,".");
+ char ra[64];
+ long seed,s2;
+ memcpy(&seed,user->host,sizeof(long));
+ memcpy(&s2,a.c_str(),sizeof(long));
+ sprintf(ra,"%.8X",seed*s2*strlen(user->host));
+ std::string b = Srv->GetNetworkName() + "-" + ra + a;
+ Srv->Log(DEBUG,"cloak: allocated "+b);
+ strcpy(user->dhost,b.c_str());
+ }
+ }
+ else
+ {
+ // user is removing the mode, so just restore their real host
+ // and make it match the displayed one.
+ strcpy(user->dhost,user->host);
+ }
+ // this mode IS ours, and we have handled it. If we chose not to handle it,
+ // for example the user cannot cloak as they have a vhost or such, then
+ // we could return 0 here instead of 1 and the core would not send the mode
+ // change to the user.
+ return 1;
+ }
+ else
{
- string a = strstr(user->dhost,".");
- char ra[64];
- long seed,s2;
- memcpy(&seed,user->dhost,sizeof(long));
- memcpy(&s2,a.c_str(),sizeof(long));
- sprintf(ra,"%.8X",seed*s2*strlen(user->host));
- string b = Srv->GetNetworkName() + "-" + ra + a;
- Srv->Debug("cloak: allocated "+b);
- strcpy(user->dhost,b.c_str());
+ // this mode isn't ours, we have to bail and return 0 to not handle it.
+ return 0;
}
}
+ virtual void OnUserConnect(userrec* user)
+ {
+ // Heres the weird bit. When a user connects we must set +x on them, so
+ // we're going to use the SendMode method of the Server class to send
+ // the mode to the client. This is basically the same as sending an
+ // SAMODE in unreal. Note that to the user it will appear as if they set
+ // the mode on themselves.
+
+ char* modes[2]; // only two parameters
+ modes[0] = user->nick; // first parameter is the nick
+ modes[1] = "+x"; // second parameter is the mode
+ Srv->SendMode(modes,2,user); // send these, forming the command "MODE <nick> +x"
+ }
+
};
+// stuff down here is the module-factory stuff. For basic modules you can ignore this.
class ModuleCloakingFactory : public ModuleFactory
{
projects / user / henk / code / inspircd.git / blobdiff