- 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.
- */
-
- char* n1 = strchr(dest->host,'.');
- char* n2 = strchr(dest->host,':');
-
- if (n1 || n2)
- {
- unsigned int iv[] = { key1, key2, key3, key4 };
- std::string a = 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 (!ipalways)
- {
- /** Reset the Hash module, and send it our IV and hex table */
- HashResetRequest(Sender, HashProvider).Send();
- HashKeyRequest(Sender, HashProvider, iv).Send();
- HashHexRequest(Sender, HashProvider, xtab[(*dest->host) % 4]);
-
- /* Generate a cloak using specialized Hash */
- std::string hostcloak = prefix + "-" + std::string(HashSumRequest(Sender, HashProvider, dest->host).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,&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,&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,':')) ? Cloak4(dest->host) : Cloak6(dest->host));
-#else
- in_addr testaddr;
- if ((inet_aton(dest->host,&testaddr) < 1) && (hostcloak.length() <= 64))
- /* Invalid ipv4 address, and ipv4 user (resolved host) */
- b = hostcloak;
- else
- /* Valid ipv4 address (not resolved) ipv4 user */
- b = Cloak4(dest->host);
-#endif
- }
- else
- {
-#ifdef IPV6
- if (dest->GetProtocolFamily() == AF_INET6)
- b = Cloak6(dest->GetIPString());
-#endif
- if (dest->GetProtocolFamily() == AF_INET)
- b = Cloak4(dest->GetIPString());
- }
-
- dest->ChangeDisplayedHost(b.c_str());
- }
-
- dest->SetMode('x',true);
- return MODEACTION_ALLOW;
- }