*UNTESTED DO NOT USE YET* - async dns for InspSocket as test - removing requirement on nss_dns.so.1

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@3017 e03df62e-2008-0410-955e-edbf42e46eb7

include/dns.h

@@ -78,6 +78,9 @@ public:
 	 * and returns true if the lookup was successfully initiated.
 	 */
 	bool ForwardLookup(std::string host);
+	/** Used by modules to perform a dns lookup but have the socket engine poll a module, instead of the dns object directly.
+	 */
+	bool ForwardLookupWithFD(std::string host, int &fd);
 	/** This method will return true when the lookup is completed. It uses poll internally
 	 * to determine the status of the socket.
 	 */

include/socket.h

@@ -26,12 +26,12 @@
 /**
  * States which a socket may be in
  */
-enum InspSocketState { I_DISCONNECTED, I_CONNECTING, I_CONNECTED, I_LISTENING, I_ERROR };
+enum InspSocketState { I_DISCONNECTED, I_RESOLVING, I_CONNECTING, I_CONNECTED, I_LISTENING, I_ERROR };
 
 /**
  * Error types which a socket may exhibit
  */
-enum InspSocketError { I_ERR_TIMEOUT, I_ERR_SOCKET, I_ERR_CONNECT, I_ERR_BIND };
+enum InspSocketError { I_ERR_TIMEOUT, I_ERR_SOCKET, I_ERR_CONNECT, I_ERR_BIND, I_ERR_RESOLVE };
 
 /**
  * InspSocket is an extendable socket class which modules
@@ -53,6 +53,11 @@ private:
 	 */
         int fd;
 
+	/**
+	 * The resolver for this socket
+	 */
+	DNS dns;
+
 	/**
 	 * The hostname connected to
 	 */
@@ -308,6 +313,8 @@ public:
 	 * used for this socket.
 	 */
 	virtual ~InspSocket();
+
+	virtual DoResolve();
 };
 
 #endif

src/dns.cpp

@@ -735,6 +735,20 @@ bool DNS::ForwardLookup(std::string host)
 	return true;
 }
 
+bool DNS::ForwardLookupWithFD(std::string host, int &fd)
+{
+	ServerInstance->stats->statsDns++;
+	this->myfd = dns_getip4(host.c_str());
+	fd = this->myfd;
+	if (this->myfd == -1)
+	{
+		
+	}
+	log(DEBUG,"DNS: ForwardLookupWithFD, fd=%d",this->myfd);
+	ServerInstance->SE->AddFd(this->myfd,true,X_ESTAB_MODULE);
+	return true;
+}
+
 bool DNS::HasResult(int fd)
 {
 	return (fd == this->myfd);

src/inspircd.cpp

@@ -21,11 +21,9 @@ using namespace std;
 #include "inspircd_config.h"
 #include "inspircd.h"
 #include "inspircd_io.h"
-#include <unistd.h>
 #include <fcntl.h>
 #include <sys/errno.h>
 #include <sys/ioctl.h>
-#include <sys/utsname.h>
 #include <time.h>
 #include <string>
 #ifdef GCC3
@@ -480,7 +478,6 @@ bool InspIRCd::LoadModule(const char* filename)
                 {
                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 			snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
-			MODCOUNT--;
 			return false;
                 }
                 if (factory[MODCOUNT+1]->factory)

src/socket.cpp

@@ -88,50 +88,67 @@ InspSocket::InspSocket(std::string host, int port, bool listening, unsigned long
 			}
 		}			
 	} else {
-		char* ip;
 		this->host = host;
-		hostent* hoste = gethostbyname(host.c_str());
-		if (!hoste) {
-			ip = (char*)host.c_str();
-		} else {
-			struct in_addr* ia = (in_addr*)hoste->h_addr;
-			ip = inet_ntoa(*ia);
+
+		if (this->dns.ForwardLookupWithFD(host,fd))
+		{
+	                timeout_end = time(NULL)+maxtime;
+	                timeout = false;
+			this->state = I_RESOLVING;
+		}
+		else
+		{
+			this->state = I_ERROR;
+			this->OnError(I_ERR_RESOLVE);
+                        return;
+		}
+}
+
+bool InspSocket::DoResolve()
+{
+	if (this->dns.HasResult())
+	{
+		std::string res_ip = dns.GetResultIP();
+		
+		if (res_ip != "")
+		{
+			this->IP = ip;
+		}
+		else
+		{
+			this->IP = this->host;
 		}
 
-		this->IP = ip;
-
-                timeout_end = time(NULL)+maxtime;
-                timeout = false;
-                if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
+		if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
 		{
 			this->state = I_ERROR;
 			this->OnError(I_ERR_SOCKET);
-                        return;
+			return false;
 		}
 		this->port = port;
-                inet_aton(ip,&addy);
-                addr.sin_family = AF_INET;
-                addr.sin_addr = addy;
-                addr.sin_port = htons(this->port);
+		inet_aton(ip,&addy);
+		addr.sin_family = AF_INET;
+		addr.sin_addr = addy;
+		addr.sin_port = htons(this->port);
 
-                int flags;
-                flags = fcntl(this->fd, F_GETFL, 0);
-                fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
+		int flags;
+		flags = fcntl(this->fd, F_GETFL, 0);
+		fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 
-                if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
-                {
-                        if (errno != EINPROGRESS)
-                        {
+		if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
+		{
+			if (errno != EINPROGRESS)
+			{
 				this->Close();
 				this->OnError(I_ERR_CONNECT);
 				this->state = I_ERROR;
-                                return;
-                        }
-                }
-                this->state = I_CONNECTING;
+				return false;
+			}
+		}
+		this->state = I_CONNECTING;
 		ServerInstance->SE->AddFd(this->fd,false,X_ESTAB_MODULE);
 		socket_ref[this->fd] = this;
-                return;
+		return true;
 	}
 }
 
@@ -203,7 +220,7 @@ void InspSocket::FlushWriteBuffer()
 
 bool InspSocket::Timeout(time_t current)
 {
-	if ((this->state == I_CONNECTING) && (current > timeout_end))
+	if (((this->state == I_RESOLVING) || (this->state == I_CONNECTING)) && (current > timeout_end))
 	{
 		// for non-listening sockets, the timeout can occur
 		// which causes termination of the connection after
@@ -226,6 +243,9 @@ bool InspSocket::Poll()
 	
 	switch (this->state)
 	{
+		case I_RESOLVING:
+			return this->DoResolve();
+		break;
 		case I_CONNECTING:
 			this->SetState(I_CONNECTED);
 			/* Our socket was in write-state, so delete it and re-add it