X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fevent_client.c;h=d0e0fd9aefe9f20295a8827fda8fb5dabcf3f26b;hb=b1493ab199a2cf39b919cb8d0536263ae1d280aa;hp=6ffc4c96a03594e2243306d0bb1b30c35eb92580;hpb=fdb030b497950239b2b7db63b3953f6a6f425f1e;p=citadel.git

diff --git a/citadel/event_client.c b/citadel/event_client.c
index 6ffc4c96a..d0e0fd9ae 100644
--- a/citadel/event_client.c
+++ b/citadel/event_client.c
@@ -1,8 +1,8 @@
 /*
  *
- * Copyright (c) 1998-2009 by the citadel.org team
+ * Copyright (c) 1998-2012 by the citadel.org team
  *
- *  This program is free software; you can redistribute it and/or modify
+ *  This program is open source software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 3 of the License, or
  *  (at your option) any later version.
@@ -46,6 +46,11 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
+#include <assert.h>
+#if HAVE_BACKTRACE
+#include <execinfo.h>
+#endif
+
 #include <libcitadel.h>
 #include "citadel.h"
 #include "server.h"
@@ -63,214 +68,936 @@
 #include "locate_host.h"
 #include "citadel_dirs.h"
 
-#ifdef EXPERIMENTAL_SMTP_EVENT_CLIENT
-
-#include <event.h>
 #include "event_client.h"
+#include "ctdl_module.h"
+
+static void IO_Timeout_callback(struct ev_loop *loop, ev_timer *watcher, int revents);
+static void IO_abort_shutdown_callback(struct ev_loop *loop,
+				       ev_cleanup *watcher,
+				       int revents);
+
+
+/*------------------------------------------------------------------------------
+ *				Server DB IO
+ *----------------------------------------------------------------------------*/
+extern int evdb_count;
+extern pthread_mutex_t DBEventQueueMutex;
+extern HashList *DBInboundEventQueue;
+extern struct ev_loop *event_db;
+extern ev_async DBAddJob;
+extern ev_async DBExitEventLoop;
+
+eNextState QueueDBOperation(AsyncIO *IO, IO_CallBack CB)
+{
+	IOAddHandler *h;
+	int i;
+
+	h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
+	h->IO = IO;
+	h->EvAttch = CB;
+	ev_cleanup_init(&IO->db_abort_by_shutdown,
+			IO_abort_shutdown_callback);
+	IO->db_abort_by_shutdown.data = IO;
+	ev_cleanup_start(event_db, &IO->db_abort_by_shutdown);
+
+	pthread_mutex_lock(&DBEventQueueMutex);
+	EVM_syslog(LOG_DEBUG, "DBEVENT Q\n");
+	i = ++evdb_count ;
+	Put(DBInboundEventQueue, IKEY(i), h, NULL);
+	pthread_mutex_unlock(&DBEventQueueMutex);
+
+	ev_async_send (event_db, &DBAddJob);
+	EVM_syslog(LOG_DEBUG, "DBEVENT Q Done.\n");
+	return eDBQuery;
+}
+
+void ShutDownDBCLient(AsyncIO *IO)
+{
+	CitContext *Ctx =IO->CitContext;
+	become_session(Ctx);
+
+	EVM_syslog(LOG_DEBUG, "DBEVENT Terminating.\n");
+	ev_cleanup_stop(event_db, &IO->db_abort_by_shutdown);
 
-extern int event_add_pipe[2];
-extern citthread_mutex_t EventQueueMutex;
-extern void *QueueEventAddPtr;
-extern AsyncIO *QueueThisIO;
-extern EventContextAttach EventContextAttachPtr;
+	assert(IO->DBTerminate);
+	IO->DBTerminate(IO);
+}
 
-int QueueEventContext(void *Ctx, AsyncIO *IO, EventContextAttach CB)
+void
+DB_PerformNext(struct ev_loop *loop, ev_idle *watcher, int revents)
 {
-	citthread_mutex_lock(&EventQueueMutex);
+	AsyncIO *IO = watcher->data;
+	IO->Now = ev_now(event_db);
+	EV_syslog(LOG_DEBUG, "%s()", __FUNCTION__);
+	become_session(IO->CitContext);
 
-	QueueEventAddPtr = Ctx;
-	EventContextAttachPtr = CB;
-	QueueThisIO = IO;
+	ev_idle_stop(event_db, &IO->db_unwind_stack);
 
-	write(event_add_pipe[1], "+_", 1);
-	citthread_mutex_unlock(&EventQueueMutex);
-	return 0;
+	assert(IO->NextDBOperation);
+	switch (IO->NextDBOperation(IO))
+	{
+	case eDBQuery:
+		break;
+	case eSendDNSQuery:
+	case eReadDNSReply:
+	case eConnect:
+	case eSendReply:
+	case eSendMore:
+	case eSendFile:
+	case eReadMessage:
+	case eReadMore:
+	case eReadPayload:
+	case eReadFile:
+		ev_cleanup_stop(loop, &IO->db_abort_by_shutdown);
+		break;
+	case eTerminateConnection:
+	case eAbort:
+		ev_idle_stop(event_db, &IO->db_unwind_stack);
+		ev_cleanup_stop(loop, &IO->db_abort_by_shutdown);
+		ShutDownDBCLient(IO);
+	}
 }
 
+eNextState NextDBOperation(AsyncIO *IO, IO_CallBack CB)
+{
+	IO->NextDBOperation = CB;
+	ev_idle_init(&IO->db_unwind_stack,
+		     DB_PerformNext);
+	IO->db_unwind_stack.data = IO;
+	ev_idle_start(event_db, &IO->db_unwind_stack);
+	return eDBQuery;
+}
 
-int ShutDownEventQueue(void)
+/*------------------------------------------------------------------------------
+ *			Client IO
+ *----------------------------------------------------------------------------*/
+extern int evbase_count;
+extern pthread_mutex_t EventQueueMutex;
+extern HashList *InboundEventQueue;
+extern struct ev_loop *event_base;
+extern ev_async AddJob;
+extern ev_async ExitEventLoop;
+
+static void IO_abort_shutdown_callback(struct ev_loop *loop,
+				       ev_cleanup *watcher,
+				       int revents)
 {
-	write(event_add_pipe[1], "x_", 1);
-	close(event_add_pipe[1]);
-	return 0;
+	AsyncIO *IO = watcher->data;
+	EV_syslog(LOG_DEBUG, "EVENT Q: %s\n", __FUNCTION__);
+	IO->Now = ev_now(event_base);
+	assert(IO->ShutdownAbort);
+	IO->ShutdownAbort(IO);
 }
 
 
+eNextState QueueEventContext(AsyncIO *IO, IO_CallBack CB)
+{
+	IOAddHandler *h;
+	int i;
+
+	h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
+	h->IO = IO;
+	h->EvAttch = CB;
+	ev_cleanup_init(&IO->abort_by_shutdown,
+			IO_abort_shutdown_callback);
+	IO->abort_by_shutdown.data = IO;
+	ev_cleanup_start(event_base, &IO->abort_by_shutdown);
+
+	pthread_mutex_lock(&EventQueueMutex);
+	EVM_syslog(LOG_DEBUG, "EVENT Q\n");
+	i = ++evbase_count;
+	Put(InboundEventQueue, IKEY(i), h, NULL);
+	pthread_mutex_unlock(&EventQueueMutex);
+
+	ev_async_send (event_base, &AddJob);
+	EVM_syslog(LOG_DEBUG, "EVENT Q Done.\n");
+	return eSendReply;
+}
+
+extern eNextState evcurl_handle_start(AsyncIO *IO);
 
-/*
-static void
-setup_signal_handlers(struct instance *instance)
+eNextState QueueCurlContext(AsyncIO *IO)
 {
-    signal(SIGPIPE, SIG_IGN);
+	IOAddHandler *h;
+	int i;
+
+	h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
+	h->IO = IO;
+	h->EvAttch = evcurl_handle_start;
+
+	pthread_mutex_lock(&EventQueueMutex);
+	EVM_syslog(LOG_DEBUG, "EVENT Q\n");
+	i = ++evbase_count;
+	Put(InboundEventQueue, IKEY(i), h, NULL);
+	pthread_mutex_unlock(&EventQueueMutex);
+
+	ev_async_send (event_base, &AddJob);
+	EVM_syslog(LOG_DEBUG, "EVENT Q Done.\n");
+	return eSendReply;
+}
 
-    event_set(&instance->sigterm_event, SIGTERM, EV_SIGNAL|EV_PERSIST,
-              exit_event_callback, instance);
-    event_add(&instance->sigterm_event, NULL);
+void DestructCAres(AsyncIO *IO);
+void FreeAsyncIOContents(AsyncIO *IO)
+{
+	CitContext *Ctx = IO->CitContext;
 
-    event_set(&instance->sigint_event, SIGINT, EV_SIGNAL|EV_PERSIST,
-              exit_event_callback, instance);
-    event_add(&instance->sigint_event, NULL);
+	FreeStrBuf(&IO->IOBuf);
+	FreeStrBuf(&IO->SendBuf.Buf);
+	FreeStrBuf(&IO->RecvBuf.Buf);
 
-    event_set(&instance->sigquit_event, SIGQUIT, EV_SIGNAL|EV_PERSIST,
-              exit_event_callback, instance);
-    event_add(&instance->sigquit_event, NULL);
+	DestructCAres(IO);
+
+	FreeURL(&IO->ConnectMe);
+	FreeStrBuf(&IO->HttpReq.ReplyData);
+
+	if (Ctx) {
+		Ctx->state = CON_IDLE;
+		Ctx->kill_me = 1;
+	}
+}
+
+
+void StopClientWatchers(AsyncIO *IO)
+{
+	ev_timer_stop (event_base, &IO->rw_timeout);
+	ev_timer_stop(event_base, &IO->conn_fail);
+	ev_idle_stop(event_base, &IO->unwind_stack);
+
+	ev_io_stop(event_base, &IO->conn_event);
+	ev_io_stop(event_base, &IO->send_event);
+	ev_io_stop(event_base, &IO->recv_event);
+
+	if (IO->SendBuf.fd != 0) {
+		close(IO->SendBuf.fd);
+	}
+	IO->SendBuf.fd = 0;
+	IO->RecvBuf.fd = 0;
 }
-*/
 
+void ShutDownCLient(AsyncIO *IO)
+{
+	CitContext *Ctx =IO->CitContext;
+	become_session(Ctx);
+
+	EVM_syslog(LOG_DEBUG, "EVENT Terminating \n");
+
+	ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
+	StopClientWatchers(IO);
+
+	if (IO->DNS.Channel != NULL) {
+		ares_destroy(IO->DNS.Channel);
+		EV_DNS_LOG_STOP(DNS.recv_event);
+		EV_DNS_LOG_STOP(DNS.send_event);
+		ev_io_stop(event_base, &IO->DNS.recv_event);
+		ev_io_stop(event_base, &IO->DNS.send_event);
+		IO->DNS.Channel = NULL;
+	}
+	assert(IO->Terminate);
+	IO->Terminate(IO);
+}
+
+void PostInbound(AsyncIO *IO)
+{
+	switch (IO->NextState) {
+	case eSendFile:
+		ev_io_start(event_base, &IO->send_event);
+		break;
+	case eSendReply:
+	case eSendMore:
+		assert(IO->SendDone);
+		IO->NextState = IO->SendDone(IO);
+		ev_io_start(event_base, &IO->send_event);
+		break;
+	case eReadPayload:
+	case eReadMore:
+	case eReadFile:
+		ev_io_start(event_base, &IO->recv_event);
+		break;
+	case eTerminateConnection:
+		ShutDownCLient(IO);
+		break;
+	case eAbort:
+		ShutDownCLient(IO);
+		break;
+	case eSendDNSQuery:
+	case eReadDNSReply:
+	case eDBQuery:
+	case eConnect:
+	case eReadMessage:
+		break;
+	}
+}
 eReadState HandleInbound(AsyncIO *IO)
 {
+	const char *Err = NULL;
 	eReadState Finished = eBufferNotEmpty;
-		
-	while ((Finished == eBufferNotEmpty) && (IO->NextState == eReadMessage)){
-		if (IO->RecvBuf.nBlobBytesWanted != 0) { 
-				
-		}
-		else { /* Reading lines... */
-//// lex line reply in callback, or do it ourselves. as nnn-blabla means continue reading in SMTP
-			if (IO->LineReader)
-				Finished = IO->LineReader(IO);
-			else 
-				Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
-				
-			switch (Finished) {
-			case eMustReadMore: /// read new from socket... 
-				return Finished;
-				break;
-			case eBufferNotEmpty: /* shouldn't happen... */
-			case eReadSuccess: /// done for now...
-				break;
-			case eReadFail: /// WHUT?
-				///todo: shut down! 
-				break;
+
+	become_session(IO->CitContext);
+
+	while ((Finished == eBufferNotEmpty) &&
+	       ((IO->NextState == eReadMessage)||
+		(IO->NextState == eReadMore)||
+		(IO->NextState == eReadFile)||
+		(IO->NextState == eReadPayload)))
+	{
+		/* Reading lines...
+		 * lex line reply in callback,
+		 * or do it ourselves.
+		 * i.e. as nnn-blabla means continue reading in SMTP
+		 */
+		if ((IO->NextState == eReadFile) &&
+		    (Finished == eBufferNotEmpty))
+		{
+			Finished = WriteIOBAlreadyRead(&IO->IOB, &Err);
+			if (Finished == eReadSuccess)
+			{
+				IO->NextState = eSendReply;
 			}
-					
 		}
-			
+		else if (IO->LineReader)
+			Finished = IO->LineReader(IO);
+		else
+			Finished = StrBufChunkSipLine(IO->IOBuf,
+						      &IO->RecvBuf);
+
+		switch (Finished) {
+		case eMustReadMore: /// read new from socket...
+			break;
+		case eBufferNotEmpty: /* shouldn't happen... */
+		case eReadSuccess: /// done for now...
+			break;
+		case eReadFail: /// WHUT?
+				///todo: shut down!
+			break;
+		}
+
 		if (Finished != eMustReadMore) {
-			event_del(&IO->recv_event);
-			IO->NextState = IO->ReadDone(IO->Data);
+			assert(IO->ReadDone);
+			ev_io_stop(event_base, &IO->recv_event);
+			IO->NextState = IO->ReadDone(IO);
 			Finished = StrBufCheckBuffer(&IO->RecvBuf);
 		}
 	}
 
+	PostInbound(IO);
 
-	if ((IO->NextState == eSendReply) ||
-	    (IO->NextState == eSendMore))
-	{
-		IO->NextState = IO->SendDone(IO->Data);
-		event_add(&IO->send_event, NULL);
-			
-	}
 	return Finished;
 }
 
 
 static void
-IO_send_callback(int fd, short event, void *ctx)
+IO_send_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 {
 	int rc;
-	AsyncIO *IO = ctx;
+	AsyncIO *IO = watcher->data;
+	const char *errmsg = NULL;
 
-	(void)fd;
-	(void)event;
-	
-///    assert(fd == IO->sock);
-	
-	rc = StrBuf_write_one_chunk_callback(fd, event, &IO->SendBuf);
+	IO->Now = ev_now(event_base);
+	become_session(IO->CitContext);
+#ifdef BIGBAD_IODBG
+	{
+		int rv = 0;
+		char fn [SIZ];
+		FILE *fd;
+		const char *pch = ChrPtr(IO->SendBuf.Buf);
+		const char *pchh = IO->SendBuf.ReadWritePointer;
+		long nbytes;
+
+		if (pchh == NULL)
+			pchh = pch;
+
+		nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
+		snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
+			 ((CitContext*)(IO->CitContext))->ServiceName,
+			 IO->SendBuf.fd);
+
+		fd = fopen(fn, "a+");
+		fprintf(fd, "Send: BufSize: %ld BufContent: [",
+			nbytes);
+		rv = fwrite(pchh, nbytes, 1, fd);
+		if (!rv) printf("failed to write debug to %s!\n", fn);
+		fprintf(fd, "]\n");
+#endif
+		switch (IO->NextState) {
+		case eSendFile:
+			rc = FileSendChunked(&IO->IOB, &errmsg);
+			if (rc < 0)
+				StrBufPlain(IO->ErrMsg, errmsg, -1);
+			break;
+		default:
+			rc = StrBuf_write_one_chunk_callback(watcher->fd,
+							     0/*TODO*/,
+							     &IO->SendBuf);
+		}
 
+#ifdef BIGBAD_IODBG
+		fprintf(fd, "Sent: BufSize: %d bytes.\n", rc);
+		fclose(fd);
+	}
+#endif
 	if (rc == 0)
 	{
-	    event_del(&IO->send_event);
-	    switch (IO->NextState) {
-	    case eSendReply:
-		    break;
-	    case eSendMore:
-		    IO->NextState = IO->SendDone(IO->Data);
-		    event_add(&IO->send_event, NULL);
-		    break;
-	    case eReadMessage:
-		    if (StrBufCheckBuffer(&IO->RecvBuf) == eBufferNotEmpty) {
-			    HandleInbound(IO);
-		    }
-		    else {
-			    event_add(&IO->recv_event, NULL);
-		    }
-
-		    break;
-	    case eAbort:
-		    break;
-	    }
-	}
-	else if (rc > 0)
-		return;
-//	else 
-		///abort!
+		ev_io_stop(event_base, &IO->send_event);
+		switch (IO->NextState) {
+		case eSendMore:
+			assert(IO->SendDone);
+			IO->NextState = IO->SendDone(IO);
+
+			if ((IO->NextState == eTerminateConnection) ||
+			    (IO->NextState == eAbort) )
+				ShutDownCLient(IO);
+			else {
+				ev_io_start(event_base, &IO->send_event);
+			}
+			break;
+		case eSendFile:
+			if (IO->IOB.ChunkSendRemain > 0) {
+				ev_io_start(event_base, &IO->recv_event);
+				SetNextTimeout(IO, 100.0);
+
+			} else {
+				assert(IO->ReadDone);
+				IO->NextState = IO->ReadDone(IO);
+				switch(IO->NextState) {
+				case eSendDNSQuery:
+				case eReadDNSReply:
+				case eDBQuery:
+				case eConnect:
+					break;
+				case eSendReply:
+				case eSendMore:
+				case eSendFile:
+					ev_io_start(event_base,
+						    &IO->send_event);
+					break;
+				case eReadMessage:
+				case eReadMore:
+				case eReadPayload:
+				case eReadFile:
+					break;
+				case eTerminateConnection:
+				case eAbort:
+					break;
+				}
+			}
+			break;
+		case eSendReply:
+		    if (StrBufCheckBuffer(&IO->SendBuf) != eReadSuccess)
+			break;
+		    IO->NextState = eReadMore;
+		case eReadMore:
+		case eReadMessage:
+		case eReadPayload:
+		case eReadFile:
+			if (StrBufCheckBuffer(&IO->RecvBuf) == eBufferNotEmpty)
+			{
+				HandleInbound(IO);
+			}
+			else {
+				ev_io_start(event_base, &IO->recv_event);
+			}
+
+			break;
+		case eDBQuery:
+			/*
+			 * we now live in another queue,
+			 * so we have to unregister.
+			 */
+			ev_cleanup_stop(loop, &IO->abort_by_shutdown);
+			break;
+		case eSendDNSQuery:
+		case eReadDNSReply:
+		case eConnect:
+		case eTerminateConnection:
+		case eAbort:
+			break;
+		}
+	}
+	else if (rc < 0) {
+		IO_Timeout_callback(loop, &IO->rw_timeout, revents);
+	}
+	/* else : must write more. */
+}
+static void
+set_start_callback(struct ev_loop *loop, AsyncIO *IO, int revents)
+{
+	switch(IO->NextState) {
+	case eReadMore:
+	case eReadMessage:
+	case eReadFile:
+		ev_io_start(event_base, &IO->recv_event);
+		break;
+	case eSendReply:
+	case eSendMore:
+	case eReadPayload:
+	case eSendFile:
+		become_session(IO->CitContext);
+		IO_send_callback(loop, &IO->send_event, revents);
+		break;
+	case eDBQuery:
+	case eSendDNSQuery:
+	case eReadDNSReply:
+	case eConnect:
+	case eTerminateConnection:
+	case eAbort:
+		/// TODO: WHUT?
+		break;
+	}
 }
 
+static void
+IO_Timeout_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
+{
+	AsyncIO *IO = watcher->data;
+
+	IO->Now = ev_now(event_base);
+	ev_timer_stop (event_base, &IO->rw_timeout);
+	become_session(IO->CitContext);
+
+	if (IO->SendBuf.fd != 0)
+	{
+		ev_io_stop(event_base, &IO->send_event);
+		ev_io_stop(event_base, &IO->recv_event);
+		ev_timer_stop (event_base, &IO->rw_timeout);
+		close(IO->SendBuf.fd);
+		IO->SendBuf.fd = IO->RecvBuf.fd = 0;
+	}
+
+	assert(IO->Timeout);
+	switch (IO->Timeout(IO))
+	{
+	case eAbort:
+		ShutDownCLient(IO);
+	default:
+		break;
+	}
+}
 
 static void
-IO_recv_callback(int fd, short event, void *ctx)
+IO_connfail_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 {
-	ssize_t nbytes;
-	AsyncIO *IO = ctx;
+	AsyncIO *IO = watcher->data;
 
-//    assert(fd == IO->sock);
-	
-//    assert(fd == sb->fd);
+	IO->Now = ev_now(event_base);
+	ev_timer_stop (event_base, &IO->conn_fail);
+
+	if (IO->SendBuf.fd != 0)
+	{
+		ev_io_stop(loop, &IO->conn_event);
+		ev_io_stop(event_base, &IO->send_event);
+		ev_io_stop(event_base, &IO->recv_event);
+		ev_timer_stop (event_base, &IO->rw_timeout);
+		close(IO->SendBuf.fd);
+		IO->SendBuf.fd = IO->RecvBuf.fd = 0;
+	}
+	become_session(IO->CitContext);
 
-	nbytes = StrBuf_read_one_chunk_callback(fd, event, &IO->RecvBuf);
+	assert(IO->ConnFail);
+	switch (IO->ConnFail(IO))
+	{
+	case eAbort:
+		ShutDownCLient(IO);
+	default:
+		break;
+
+	}
+}
+
+static void
+IO_connfailimmediate_callback(struct ev_loop *loop,
+			      ev_idle *watcher,
+			      int revents)
+{
+	AsyncIO *IO = watcher->data;
+
+	IO->Now = ev_now(event_base);
+	ev_idle_stop (event_base, &IO->conn_fail_immediate);
+
+	if (IO->SendBuf.fd != 0)
+	{
+		close(IO->SendBuf.fd);
+		IO->SendBuf.fd = IO->RecvBuf.fd = 0;
+	}
+	become_session(IO->CitContext);
+
+	assert(IO->ConnFail);
+	switch (IO->ConnFail(IO))
+	{
+	case eAbort:
+		ShutDownCLient(IO);
+	default:
+		break;
+
+	}
+}
+
+static void
+IO_connestd_callback(struct ev_loop *loop, ev_io *watcher, int revents)
+{
+	AsyncIO *IO = watcher->data;
+
+	IO->Now = ev_now(event_base);
+	ev_io_stop(loop, &IO->conn_event);
+	ev_timer_stop (event_base, &IO->conn_fail);
+	set_start_callback(loop, IO, revents);
+}
+static void
+IO_recv_callback(struct ev_loop *loop, ev_io *watcher, int revents)
+{
+	const char *errmsg;
+	ssize_t nbytes;
+	AsyncIO *IO = watcher->data;
+
+	IO->Now = ev_now(event_base);
+	switch (IO->NextState) {
+	case eReadFile:
+		nbytes = FileRecvChunked(&IO->IOB, &errmsg);
+		if (nbytes < 0)
+			StrBufPlain(IO->ErrMsg, errmsg, -1);
+		else
+		{
+			if (IO->IOB.ChunkSendRemain == 0)
+			{
+				IO->NextState = eSendReply;
+				assert(IO->ReadDone);
+				ev_io_stop(event_base, &IO->recv_event);
+				PostInbound(IO);
+				return;
+			}
+			else
+				return;
+		}
+		break;
+	default:
+		nbytes = StrBuf_read_one_chunk_callback(watcher->fd,
+							0 /*TODO */,
+							&IO->RecvBuf);
+		break;
+	}
+
+#ifdef BIGBAD_IODBG
+	{
+		long nbytes;
+		int rv = 0;
+		char fn [SIZ];
+		FILE *fd;
+		const char *pch = ChrPtr(IO->RecvBuf.Buf);
+		const char *pchh = IO->RecvBuf.ReadWritePointer;
+
+		if (pchh == NULL)
+			pchh = pch;
+
+		nbytes = StrLength(IO->RecvBuf.Buf) - (pchh - pch);
+		snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
+			 ((CitContext*)(IO->CitContext))->ServiceName,
+			 IO->SendBuf.fd);
+
+		fd = fopen(fn, "a+");
+		fprintf(fd, "Read: BufSize: %ld BufContent: [",
+			nbytes);
+		rv = fwrite(pchh, nbytes, 1, fd);
+		if (!rv) printf("failed to write debug to %s!\n", fn);
+		fprintf(fd, "]\n");
+		fclose(fd);
+	}
+#endif
 	if (nbytes > 0) {
 		HandleInbound(IO);
 	} else if (nbytes == 0) {
-		///  TODO: this is a timeout???  sock_buff_invoke_free(sb, 0);
+		IO_Timeout_callback(loop, &IO->rw_timeout, revents);
 		return;
 	} else if (nbytes == -1) {
-/// TODO: FD is gone. kick it.        sock_buff_invoke_free(sb, errno);
+		// FD is gone. kick it. 
+		StopClientWatchers(IO);
+		EV_syslog(LOG_DEBUG,
+			  "EVENT: Socket Invalid! %s \n",
+			  strerror(errno));
+		ShutDownCLient(IO);
 		return;
 	}
 }
 
-void IOReadNextLine(AsyncIO *IO, int timeout)
+void
+IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
+{
+	AsyncIO *IO = watcher->data;
+	IO->Now = ev_now(event_base);
+	EV_syslog(LOG_DEBUG, "event: %s\n", __FUNCTION__);
+	become_session(IO->CitContext);
+	assert(IO->DNS.Query->PostDNS);
+	switch (IO->DNS.Query->PostDNS(IO))
+	{
+	case eAbort:
+		assert(IO->DNS.Fail);
+		switch (IO->DNS.Fail(IO)) {
+		case eAbort:
+////			StopClientWatchers(IO);
+			ShutDownCLient(IO);
+		default:
+			break;
+		}
+	default:
+		break;
+	}
+}
+
+
+eNextState EvConnectSock(AsyncIO *IO,
+			 double conn_timeout,
+			 double first_rw_timeout,
+			 int ReadFirst)
 {
+	struct sockaddr_in egress_sin;
+	int fdflags;
+	int rc = -1;
+
+	become_session(IO->CitContext);
+
+	if (ReadFirst) {
+		IO->NextState = eReadMessage;
+	}
+	else {
+		IO->NextState = eSendReply;
+	}
+
+	IO->SendBuf.fd = IO->RecvBuf.fd =
+		socket(
+			(IO->ConnectMe->IPv6)?PF_INET6:PF_INET,
+			SOCK_STREAM,
+			IPPROTO_TCP);
+
+	if (IO->SendBuf.fd < 0) {
+		EV_syslog(LOG_ERR,
+			  "EVENT: socket() failed: %s\n",
+			  strerror(errno));
+
+		StrBufPrintf(IO->ErrMsg,
+			     "Failed to create socket: %s",
+			     strerror(errno));
+		IO->SendBuf.fd = IO->RecvBuf.fd = 0;
+		return eAbort;
+	}
+	fdflags = fcntl(IO->SendBuf.fd, F_GETFL);
+	if (fdflags < 0) {
+		EV_syslog(LOG_DEBUG,
+			  "EVENT: unable to get socket flags! %s \n",
+			  strerror(errno));
+		StrBufPrintf(IO->ErrMsg,
+			     "Failed to get socket flags: %s",
+			     strerror(errno));
+		close(IO->SendBuf.fd);
+		IO->SendBuf.fd = IO->RecvBuf.fd = 0;
+		return eAbort;
+	}
+	fdflags = fdflags | O_NONBLOCK;
+	if (fcntl(IO->SendBuf.fd, F_SETFL, fdflags) < 0) {
+		EV_syslog(
+			LOG_DEBUG,
+			"EVENT: unable to set socket nonblocking flags! %s \n",
+			strerror(errno));
+		StrBufPrintf(IO->ErrMsg,
+			     "Failed to set socket flags: %s",
+			     strerror(errno));
+		close(IO->SendBuf.fd);
+		IO->SendBuf.fd = IO->RecvBuf.fd = 0;
+		return eAbort;
+	}
+/* TODO: maye we could use offsetof() to calc the position of data...
+ * http://doc.dvgu.ru/devel/ev.html#associating_custom_data_with_a_watcher
+ */
+	ev_io_init(&IO->recv_event, IO_recv_callback, IO->RecvBuf.fd, EV_READ);
+	IO->recv_event.data = IO;
+	ev_io_init(&IO->send_event, IO_send_callback, IO->SendBuf.fd, EV_WRITE);
+	IO->send_event.data = IO;
+
+	ev_timer_init(&IO->conn_fail, IO_connfail_callback, conn_timeout, 0);
+	IO->conn_fail.data = IO;
+	ev_timer_init(&IO->rw_timeout, IO_Timeout_callback, first_rw_timeout,0);
+	IO->rw_timeout.data = IO;
 
+
+
+
+	/* for debugging you may bypass it like this:
+	 * IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1");
+	 * ((struct sockaddr_in)IO->ConnectMe->Addr).sin_addr.s_addr =
+	 *   inet_addr("127.0.0.1");
+	 */
+	if (IO->ConnectMe->IPv6) {
+		rc = connect(IO->SendBuf.fd,
+			     &IO->ConnectMe->Addr,
+			     sizeof(struct sockaddr_in6));
+	}
+	else {
+		/* If citserver is bound to a specific IP address on the host, make
+		 * sure we use that address for outbound connections.
+		 */
+	
+		memset(&egress_sin, 0, sizeof(egress_sin));
+		egress_sin.sin_family = AF_INET;
+		if (!IsEmptyStr(config.c_ip_addr)) {
+			egress_sin.sin_addr.s_addr = inet_addr(config.c_ip_addr);
+			if (egress_sin.sin_addr.s_addr == !INADDR_ANY) {
+				egress_sin.sin_addr.s_addr = INADDR_ANY;
+			}
+
+			/* If this bind fails, no problem; we can still use INADDR_ANY */
+			bind(IO->SendBuf.fd, (struct sockaddr *)&egress_sin, sizeof(egress_sin));
+		}
+		rc = connect(IO->SendBuf.fd,
+			     (struct sockaddr_in *)&IO->ConnectMe->Addr,
+			     sizeof(struct sockaddr_in));
+	}
+
+	if (rc >= 0){
+		EVM_syslog(LOG_DEBUG, "connect() immediate success.\n");
+		set_start_callback(event_base, IO, 0);
+		ev_timer_start(event_base, &IO->rw_timeout);
+		return IO->NextState;
+	}
+	else if (errno == EINPROGRESS) {
+		EVM_syslog(LOG_DEBUG, "connect() have to wait now.\n");
+
+		ev_io_init(&IO->conn_event,
+			   IO_connestd_callback,
+			   IO->SendBuf.fd,
+			   EV_READ|EV_WRITE);
+
+		IO->conn_event.data = IO;
+
+		ev_io_start(event_base, &IO->conn_event);
+		ev_timer_start(event_base, &IO->conn_fail);
+		return IO->NextState;
+	}
+	else {
+		ev_idle_init(&IO->conn_fail_immediate,
+			     IO_connfailimmediate_callback);
+		IO->conn_fail_immediate.data = IO;
+		ev_idle_start(event_base, &IO->conn_fail_immediate);
+
+		EV_syslog(LOG_ERR, "connect() failed: %s\n", strerror(errno));
+		StrBufPrintf(IO->ErrMsg,
+			     "Failed to connect: %s",
+			     strerror(errno));
+		return IO->NextState;
+	}
+	return IO->NextState;
 }
 
-void IOReadNextBLOB(AsyncIO *IO, int timeout, long size)
+void SetNextTimeout(AsyncIO *IO, double timeout)
 {
+	IO->rw_timeout.repeat = timeout;
+	ev_timer_again (event_base,  &IO->rw_timeout);
 }
 
-void InitEventIO(AsyncIO *IO, 
-		 void *pData, 
-		 IO_CallBack ReadDone, 
-		 IO_CallBack SendDone, 
-		 IO_LineReaderCallback LineReader,
-		 int ReadFirst)
+
+eNextState ReAttachIO(AsyncIO *IO,
+		      void *pData,
+		      int ReadFirst)
 {
 	IO->Data = pData;
-	IO->SendDone = SendDone;
-	IO->ReadDone = ReadDone;
-	IO->LineReader = LineReader;
-
-	event_set(&IO->recv_event, 
-		  IO->sock, 
-		  EV_READ|EV_PERSIST,
-		  IO_recv_callback, 
-		  IO);
-
-	event_set(&IO->send_event, 
-		  IO->sock,
-		  EV_WRITE|EV_PERSIST,
-		  IO_send_callback, 
-		  IO);
-
+	become_session(IO->CitContext);
+	ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 	if (ReadFirst) {
 		IO->NextState = eReadMessage;
-		event_add(&IO->recv_event, NULL);
 	}
 	else {
 		IO->NextState = eSendReply;
 	}
+	set_start_callback(event_base, IO, 0);
+
+	return IO->NextState;
+}
+
+void InitIOStruct(AsyncIO *IO,
+		  void *Data,
+		  eNextState NextState,
+		  IO_LineReaderCallback LineReader,
+		  IO_CallBack DNS_Fail,
+		  IO_CallBack SendDone,
+		  IO_CallBack ReadDone,
+		  IO_CallBack Terminate,
+		  IO_CallBack DBTerminate,
+		  IO_CallBack ConnFail,
+		  IO_CallBack Timeout,
+		  IO_CallBack ShutdownAbort)
+{
+	IO->Data          = Data;
+
+	IO->CitContext    = CloneContext(CC);
+	((CitContext *)IO->CitContext)->session_specific_data = (char*) Data;
+
+	IO->NextState     = NextState;
+
+	IO->SendDone      = SendDone;
+	IO->ReadDone      = ReadDone;
+	IO->Terminate     = Terminate;
+	IO->DBTerminate   = DBTerminate;
+	IO->LineReader    = LineReader;
+	IO->ConnFail      = ConnFail;
+	IO->Timeout       = Timeout;
+	IO->ShutdownAbort = ShutdownAbort;
+
+	IO->DNS.Fail      = DNS_Fail;
+
+	IO->SendBuf.Buf   = NewStrBufPlain(NULL, 1024);
+	IO->RecvBuf.Buf   = NewStrBufPlain(NULL, 1024);
+	IO->IOBuf         = NewStrBuf();
+	EV_syslog(LOG_DEBUG,
+		  "EVENT: Session lives at %p IO at %p \n",
+		  Data, IO);
+
 }
 
+extern int evcurl_init(AsyncIO *IO);
+
+int InitcURLIOStruct(AsyncIO *IO,
+		     void *Data,
+		     const char* Desc,
+		     IO_CallBack SendDone,
+		     IO_CallBack Terminate,
+		     IO_CallBack DBTerminate,
+		     IO_CallBack ShutdownAbort)
+{
+	IO->Data          = Data;
+
+	IO->CitContext    = CloneContext(CC);
+	((CitContext *)IO->CitContext)->session_specific_data = (char*) Data;
+
+	IO->SendDone      = SendDone;
+	IO->Terminate     = Terminate;
+	IO->DBTerminate   = DBTerminate;
+	IO->ShutdownAbort = ShutdownAbort;
+
+	strcpy(IO->HttpReq.errdesc, Desc);
 
+
+	return  evcurl_init(IO);
+
+}
+
+void EV_backtrace(AsyncIO *IO)
+{
+#ifdef HAVE_BACKTRACE
+	void *stack_frames[50];
+	size_t size, i;
+	char **strings;
+
+
+	size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
+	strings = backtrace_symbols(stack_frames, size);
+	for (i = 0; i < size; i++) {
+		if (strings != NULL)
+			EV_syslog(LOG_ALERT, " BT %s\n", strings[i]);
+		else
+			EV_syslog(LOG_ALERT, " BT %p\n", stack_frames[i]);
+	}
+	free(strings);
 #endif
+}
+
+
+ev_tstamp ctdl_ev_now (void)
+{
+	return ev_now(event_base);
+}