* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
#include <arpa/inet.h>
#else
#include "inspircd_win32wrapper.h"
-#include "inspircd_se_config.h"
#endif
#include "inspircd.h"
}
};
+CachedQuery::CachedQuery(const std::string &res, unsigned int ttl) : data(res)
+{
+ expires = ServerInstance->Time() + ttl;
+}
+
+int CachedQuery::CalcTTLRemaining()
+{
+ int n = expires - ServerInstance->Time();
+ return (n < 0 ? 0 : n);
+}
+
/* Allocate the processing buffer */
DNSRequest::DNSRequest(DNS* dns, int rid, const std::string &original) : dnsobj(dns)
{
DNS::EmptyHeader(payload,header,length);
- if (this->dnsobj->socketfamily == AF_INET6)
- {
- sockaddr_in6 addr;
- memset(&addr,0,sizeof(addr));
- memcpy(&addr.sin6_addr,&dnsobj->myserver6,sizeof(addr.sin6_addr));
- addr.sin6_family = AF_INET6;
- addr.sin6_port = htons(DNS::QUERY_PORT);
- if (ServerInstance->SE->SendTo(dnsobj, payload, length + 12, 0, (sockaddr *) &addr, sizeof(addr)) != length+12)
- return -1;
- }
- else
- {
- sockaddr_in addr;
- memset(&addr,0,sizeof(addr));
- memcpy(&addr.sin_addr.s_addr,&dnsobj->myserver4,sizeof(addr.sin_addr));
- addr.sin_family = AF_INET;
- addr.sin_port = htons(DNS::QUERY_PORT);
- if (ServerInstance->SE->SendTo(dnsobj, (const char*)payload, length + 12, 0, (sockaddr *) &addr, sizeof(addr)) != length+12)
- return -1;
- }
+ if (ServerInstance->SE->SendTo(dnsobj, payload, length + 12, 0, &(dnsobj->myserver.sa), sa_size(dnsobj->myserver)) != length+12)
+ return -1;
ServerInstance->Logs->Log("RESOLVER",DEBUG,"Sent OK");
return 0;
return NULL;
/* Create an id */
- id = this->PRNG() & DNS::MAX_REQUEST_ID;
-
- /* If this id is already 'in flight', pick another. */
- while (requests[id])
- id = this->PRNG() & DNS::MAX_REQUEST_ID;
+ do {
+ id = ServerInstance->GenRandomInt(DNS::MAX_REQUEST_ID);
+ } while (requests[id]);
DNSRequest* req = new DNSRequest(this, id, original);
void DNS::Rehash()
{
- ip6munge = false;
int portpass = 0;
if (this->GetFd() > -1)
this->cache = new dnscache();
}
- if ((strstr(ServerInstance->Config->DNSServer,"::ffff:") == (char*)&ServerInstance->Config->DNSServer) || (strstr(ServerInstance->Config->DNSServer,"::FFFF:") == (char*)&ServerInstance->Config->DNSServer))
- {
- ServerInstance->Logs->Log("RESOLVER",DEFAULT,"WARNING: Using IPv4 addresses over IPv6 forces some DNS checks to be disabled.");
- ServerInstance->Logs->Log("RESOLVER",DEFAULT," This should not cause a problem, however it is recommended you migrate");
- ServerInstance->Logs->Log("RESOLVER",DEFAULT," to a true IPv6 environment.");
- this->ip6munge = true;
- }
-
- this->socketfamily = AF_INET;
- if (strchr(ServerInstance->Config->DNSServer,':'))
- {
- this->socketfamily = AF_INET6;
- inet_pton(AF_INET6, ServerInstance->Config->DNSServer, &this->myserver6);
- }
- else
- {
- inet_aton(ServerInstance->Config->DNSServer, &this->myserver4);
- portpass = -1;
- }
+ irc::sockets::aptosa(ServerInstance->Config->DNSServer, DNS::QUERY_PORT, myserver);
/* Initialize mastersocket */
- int s = irc::sockets::OpenTCPSocket(ServerInstance->Config->DNSServer, SOCK_DGRAM);
+ int s = socket(myserver.sa.sa_family, SOCK_DGRAM, 0);
this->SetFd(s);
- ServerInstance->SE->NonBlocking(this->GetFd());
/* Have we got a socket and is it nonblocking? */
if (this->GetFd() != -1)
{
+ ServerInstance->SE->SetReuse(s);
+ ServerInstance->SE->NonBlocking(s);
/* Bind the port - port 0 INADDR_ANY */
if (!ServerInstance->BindSocket(this->GetFd(), portpass, "", false))
{
DNSRequest *req;
unsigned char buffer[sizeof(DNSHeader)];
irc::sockets::sockaddrs from;
- socklen_t x = this->socketfamily == AF_INET ? sizeof(sockaddr_in) : sizeof(sockaddr_in6);
- const char* ipaddr_from;
- unsigned short int port_from = 0;
+ memset(&from, 0, sizeof(from));
+ socklen_t x = sizeof(from);
int length = ServerInstance->SE->RecvFrom(this, (char*)buffer, sizeof(DNSHeader), 0, &from.sa, &x);
* is not 53.
* A user could in theory still spoof dns packets anyway
* but this is less trivial than just sending garbage
- * to the client, which is possible without this check.
+ * to the server, which is possible without this check.
*
* -- Thanks jilles for pointing this one out.
*/
- char nbuf[MAXBUF];
- if (this->socketfamily == AF_INET6)
- {
- ipaddr_from = inet_ntop(AF_INET6, &from.in6.sin6_addr, nbuf, sizeof(nbuf));
- port_from = ntohs(from.in6.sin6_port);
- }
- else
- {
- ipaddr_from = inet_ntoa(from.in4.sin_addr);
- port_from = ntohs(from.in4.sin_port);
- }
-
- /* We cant perform this security check if you're using 4in6.
- * Tough luck to you, choose one or't other!
- */
- if (!ip6munge)
+ if (memcmp(&from, &myserver, sizeof(irc::sockets::sockaddrs)))
{
- if ((port_from != DNS::QUERY_PORT) || (strcasecmp(ipaddr_from, ServerInstance->Config->DNSServer)))
- {
- return DNSResult(-1,"",0,"");
- }
+ return DNSResult(-1,"",0,"");
}
/* Put the read header info into a header class */
}
}
}
-
-/** Generate pseudo-random number */
-unsigned long DNS::PRNG()
-{
- unsigned long val = 0;
- timeval n;
- serverstats* s = ServerInstance->stats;
- gettimeofday(&n,NULL);
- val = (n.tv_usec ^ (getpid() ^ geteuid()) ^ ((this->currid++)) ^ s->statsAccept) + n.tv_sec;
- val = val + (s->statsCollisions ^ s->statsDnsGood) - s->statsDnsBad;
- val += (s->statsConnects ^ (unsigned long)s->statsSent ^ (unsigned long)s->statsRecv) - ServerInstance->ports.size();
- return val;
-}
projects / user / henk / code / inspircd.git / blobdiff