The beginnings of a new IMAP provider module

12 files changed, 4071 insertions, 0 deletions

diff --git a/camel/providers/imap4/Makefile.am b/camel/providers/imap4/Makefile.am
new file mode 100644
index 000000000..c07f943e8
--- /dev/null
+++ b/camel/providers/imap4/Makefile.am
@@ -0,0 +1,33 @@
+## Process this file with automake to produce Makefile.in
+
+libcamelimap4includedir = $(privincludedir)/camel
+
+camel_provider_LTLIBRARIES = libcamelimap4.la
+camel_provider_DATA = libcamelimap4.urls
+
+INCLUDES = 					\
+	-I$(top_srcdir)				\
+	-I$(top_srcdir)/camel			\
+	-I$(top_srcdir)/intl			\
+	-I$(top_srcdir)/e-util			\
+	-I$(top_srcdir)				\
+	$(CAMEL_CFLAGS)				\
+	$(GNOME_INCLUDEDIR)			\
+	$(GTK_INCLUDEDIR)			\
+	-DG_LOG_DOMAIN=\"camel-imap4-provider\"
+
+libcamelimap4_la_SOURCES = 			\
+	camel-imap-command.c			\
+	camel-imap-command.h			\
+	camel-imap-engine.c			\
+	camel-imap-engine.h			\
+	camel-imap-specials.c			\
+	camel-imap-specials.h			\
+	camel-imap-stream.c			\
+	camel-imap-stream.h			\
+	camel-imap-utils.c			\
+	camel-imap-utils.h
+
+libcamelimap4_la_LDFLAGS = -avoid-version -module
+
+EXTRA_DIST = libcamelimap4.urls
diff --git a/camel/providers/imap4/camel-imap-command.c b/camel/providers/imap4/camel-imap-command.c
new file mode 100644
index 000000000..4dfcb8fae
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-command.c
@@ -0,0 +1,661 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <camel/camel-stream-null.h>
+#include <camel/camel-stream-filter.h>
+#include <camel/camel-mime-filter-crlf.h>
+
+#include "camel-imap-stream.h"
+#include "camel-imap-engine.h"
+/*#include "camel-imap-folder.h"*/
+#include "camel-imap-specials.h"
+
+#include "camel-imap-command.h"
+
+
+#define d(x) x
+
+
+enum {
+	IMAP_STRING_ATOM,
+	IMAP_STRING_QSTRING,
+	IMAP_STRING_LITERAL,
+};
+
+static int
+imap_string_get_type (const char *str)
+{
+	int type = 0;
+	
+	while (*str) {
+		if (!is_atom (*str)) {
+			if (is_qsafe (*str))
+				type = IMAP_STRING_QSTRING;
+			else
+				return IMAP_STRING_LITERAL;
+		}
+		str++;
+	}
+	
+	return type;
+}
+
+static gboolean
+imap_string_is_atom_safe (const char *str)
+{
+	while (is_atom (*str))
+		str++;
+	
+	return *str == '\0';
+}
+
+static gboolean
+imap_string_is_quote_safe (const char *str)
+{
+	while (is_qsafe (*str))
+		str++;
+	
+	return *str == '\0';
+}
+
+static size_t
+camel_imap_literal_length (CamelIMAPLiteral *literal)
+{
+	CamelStream *stream, *null;
+	CamelMimeFilter *crlf;
+	size_t len;
+	
+	if (literal->type == CAMEL_IMAP_LITERAL_STRING)
+		return strlen (literal->literal.string);
+	
+	null = camel_stream_null_new ();
+	crlf = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE, CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
+	stream = (CamelStream *) camel_stream_filter_new_with_stream (null);
+	camel_stream_filter_add ((CamelStreamFilter *) stream, crlf);
+	camel_object_unref (crlf);
+	
+	switch (literal->type) {
+	case CAMEL_IMAP_LITERAL_STREAM:
+		camel_stream_write_to_stream (literal->literal.stream, stream);
+		camel_stream_reset (literal->literal.stream);
+		break;
+	case CAMEL_IMAP_LITERAL_WRAPPER:
+		camel_data_wrapper_write_to_stream (literal->literal.wrapper, stream);
+		break;
+	default:
+		g_assert_not_reached ();
+		break;
+	}
+	
+	len = ((CamelStreamNull *) null)->written;
+	
+	camel_object_unref (stream);
+	camel_object_unref (null);
+	
+	return len;
+}
+
+static CamelIMAPCommandPart *
+command_part_new (void)
+{
+	CamelIMAPCommandPart *part;
+	
+	part = g_new (CamelIMAPCommandPart, 1);
+	part->next = NULL;
+	part->buffer = NULL;
+	part->buflen = 0;
+	part->literal = NULL;
+	
+	return part;
+}
+
+static void
+imap_command_append_string (CamelIMAPEngine *engine, CamelIMAPCommandPart **tail, GString *str, const char *string)
+{
+	CamelIMAPCommandPart *part;
+	CamelIMAPLiteral *literal;
+	
+	switch (imap_string_get_type (string)) {
+	case IMAP_STRING_ATOM:
+		/* string is safe as it is... */
+		g_string_append (str, string);
+		break;
+	case IMAP_STRING_QSTRING:
+		/* we need to quote the string */
+		/* FIXME: need to escape stuff */
+		g_string_append_printf (str, "\"%s\"", string);
+		break;
+	case IMAP_STRING_LITERAL:
+		if (engine->capa & CAMEL_IMAP_CAPABILITY_LITERALPLUS) {
+			/* we have to send a literal, but the server supports LITERAL+ so use that */
+			g_string_append_printf (str, "{%u+}\r\n%s", strlen (string), string);
+		} else {
+			/* we have to make it a literal */
+			literal = g_new (CamelIMAPLiteral, 1);
+			literal->type = CAMEL_IMAP_LITERAL_STRING;
+			literal->literal.string = g_strdup (string);
+			
+			g_string_append_printf (str, "{%u}\r\n", strlen (string));
+			
+			(*tail)->buffer = g_strdup (str->str);
+			(*tail)->buflen = str->len;
+			(*tail)->literal = literal;
+			
+			part = command_part_new ();
+			(*tail)->next = part;
+			(*tail) = part;
+			
+			g_string_truncate (str, 0);
+		}
+		break;
+	}
+}
+
+CamelIMAPCommand *
+camel_imap_command_newv (CamelIMAPEngine *engine, CamelIMAPFolder *imap_folder, const char *format, va_list args)
+{
+	CamelIMAPCommandPart *parts, *part, *tail;
+	CamelIMAPCommand *ic;
+	const char *start;
+	GString *str;
+	
+	tail = parts = command_part_new ();
+	
+	str = g_string_new ("");
+	start = format;
+	
+	while (*format) {
+		register char ch = *format++;
+		
+		if (ch == '%') {
+			CamelIMAPLiteral *literal;
+			CamelIMAPFolder *folder;
+			CamelDataWrapper *wrapper;
+			CamelStream *stream;
+			unsigned int u;
+			char *string;
+			size_t len;
+			int c, d;
+			
+			g_string_append_len (str, start, format - start - 1);
+			
+			switch (*format) {
+			case '%':
+				/* literal % */
+				g_string_append_c (str, '%');
+				break;
+			case 'c':
+				/* character */
+				c = va_arg (args, int);
+				g_string_append_c (str, c);
+				break;
+			case 'd':
+				/* integer */
+				d = va_arg (args, int);
+				g_string_append_printf (str, "%d", d);
+				break;
+			case 'u':
+				/* unsigned integer */
+				u = va_arg (args, unsigned int);
+				g_string_append_printf (str, "%u", u);
+				break;
+			case 'F':
+				/* CamelIMAPFolder */
+				folder = va_arg (args, CamelIMAPFolder *);
+				string = (char *) camel_imap_folder_utf7_name (folder);
+				imap_command_append_string (engine, &tail, str, string);
+				break;
+			case 'L':
+				/* Literal */
+				literal = va_arg (args, CamelIMAPLiteral *);
+				len = camel_imap_literal_length (literal);
+				g_string_append_printf (str, "{%u}\r\n", len);
+				
+				tail->buffer = g_strdup (str->str);
+				tail->buflen = str->len;
+				tail->literal = literal;
+				
+				part = command_part_new ();
+				tail->next = part;
+				tail = part;
+				
+				g_string_truncate (str, 0);
+				
+				break;
+			case 'S':
+				/* string which may need to be quoted or made into a literal */
+				string = va_arg (args, char *);
+				imap_command_append_string (engine, &tail, str, string);
+				break;
+			case 's':
+				/* safe atom string */
+				string = va_arg (args, char *);
+				g_string_append (str, string);
+				break;
+			default:
+				g_warning ("unknown formatter %%c", *format);
+				g_string_append_c (str, '%');
+				g_string_append_c (str, *format);
+				break;
+			}
+			
+			format++;
+			
+			start = format;
+		}
+	}
+	
+	g_string_append (str, start);
+	tail->buffer = str->str;
+	tail->buflen = str->len;
+	tail->literal = NULL;
+	g_string_free (str, FALSE);
+	
+	ic = g_new0 (CamelIMAPCommand, 1);
+	((EDListNode *) ic)->next = NULL;
+	((EDListNode *) ic)->prev = NULL;
+	ic->untagged = g_hash_table_new (g_str_hash, g_str_equal);
+	ic->status = CAMEL_IMAP_COMMAND_QUEUED;
+	ic->resp_codes = g_ptr_array_new ();
+	ic->engine = engine;
+	ic->ref_count = 1;
+	ic->parts = parts;
+	ic->part = parts;
+	
+	camel_exception_init (&ic->ex);
+	
+	if (imap_folder) {
+		camel_object_ref (imap_folder);
+		ic->folder = imap_folder;
+	} else
+		ic->folder = NULL;
+	
+	return ic;
+}
+
+CamelIMAPCommand *
+camel_imap_command_new (CamelIMAPEngine *engine, CamelIMAPFolder *folder, const char *format, ...)
+{
+	CamelIMAPCommand *command;
+	va_list args;
+	
+	va_start (args, format);
+	command = camel_imap_command_newv (engine, folder, format, args);
+	va_end (args);
+	
+	return command;
+}
+
+void
+camel_imap_command_register_untagged (CamelIMAPCommand *ic, const char *atom, CamelIMAPUntaggedCallback untagged)
+{
+	g_hash_table_insert (ic->untagged, g_strdup (atom), untagged);
+}
+
+void
+camel_imap_command_ref (CamelIMAPCommand *ic)
+{
+	ic->ref_count++;
+}
+
+void
+camel_imap_command_unref (CamelIMAPCommand *ic)
+{
+	CamelIMAPCommandPart *part, *next;
+	CamelIMAPLiteral *literal;
+	int i;
+	
+	if (ic == NULL)
+		return;
+	
+	ic->ref_count--;
+	if (ic->ref_count == 0) {
+		if (ic->folder)
+			camel_object_unref (ic->folder);
+		
+		g_free (ic->tag);
+		
+		for (i = 0; i < ic->resp_codes->len; i++) {
+			CamelIMAPRespCode *resp_code;
+			
+			resp_code = ic->resp_codes->pdata[i];
+			camel_imap_resp_code_free (resp_code);
+		}
+		g_ptr_array_free (ic->resp_codes, TRUE);
+		
+		g_hash_table_foreach (ic->untagged, (GHFunc) g_free, NULL);
+		g_hash_table_destroy (ic->untagged);
+		
+		camel_exception_clear (&ic->ex);
+		
+		part = ic->parts;
+		while (part != NULL) {
+			g_free (part->buffer);
+			if (part->literal) {
+				switch (part->literal->type) {
+				case CAMEL_IMAP_LITERAL_STRING:
+					g_free (part->literal->literal.string);
+					break;
+				case CAMEL_IMAP_LITERAL_STREAM:
+					camel_object_unref (part->literal->literal.stream);
+					break;
+				case CAMEL_IMAP_LITERAL_WRAPPER:
+					camel_object_unref (part->literal->literal.wrapper);
+					break;
+				}
+				
+				g_free (part->literal);
+			}
+			
+			next = part->next;
+			g_free (part);
+			part = next;
+		}
+		
+		g_free (ic);
+	}
+}
+
+
+static int
+imap_literal_write_to_stream (CamelIMAPLiteral *literal, CamelStream *stream)
+{
+	CamelStream *istream, *ostream = NULL;
+	CamelDataWrapper *wrapper;
+	CamelMimeFilter *crlf;
+	char *string;
+	
+	if (literal->type == CAMEL_IMAP_LITERAL_STRING) {
+		string = literal->literal.string;
+		if (camel_stream_write (stream, string, strlen (string)) == -1)
+			return -1;
+		
+		return 0;
+	}
+	
+	crlf = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE, CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
+	ostream = (CamelStream *) camel_stream_filter_new_with_stream (stream);
+	camel_stream_filter_add ((CamelStreamFilter *) ostream, crlf);
+	camel_object_unref (crlf);
+	
+	/* write the literal */
+	switch (literal->type) {
+	case CAMEL_IMAP_LITERAL_STREAM:
+		istream = literal->literal.stream;
+		if (camel_stream_write_to_stream (istream, ostream) == -1)
+			goto exception;
+		break;
+	case CAMEL_IMAP_LITERAL_WRAPPER:
+		wrapper = literal->literal.wrapper;
+		if (camel_data_wrapper_write_to_stream (wrapper, ostream) == -1)
+			goto exception;
+		break;
+	}
+	
+	camel_object_unref (ostream);
+	ostream = NULL;
+	
+#if 0
+	if (camel_stream_write (stream, "\r\n", 2) == -1)
+		return -1;
+#endif
+	
+	return 0;
+	
+ exception:
+	
+	camel_object_unref (ostream);
+	
+	return -1;
+}
+
+
+static void
+unexpected_token (camel_imap_token_t *token)
+{
+	switch (token->token) {
+	case CAMEL_IMAP_TOKEN_NO_DATA:
+		fprintf (stderr, "*** NO DATA ***");
+		break;
+	case CAMEL_IMAP_TOKEN_ERROR:
+		fprintf (stderr, "*** ERROR ***");
+		break;
+	case CAMEL_IMAP_TOKEN_NIL:
+		fprintf (stderr, "NIL");
+		break;
+	case CAMEL_IMAP_TOKEN_ATOM:
+	        fprintf (stderr, "%s", token->v.atom);
+		break;
+	case CAMEL_IMAP_TOKEN_QSTRING:
+	        fprintf (stderr, "\"%s\"", token->v.qstring);
+		break;
+	case CAMEL_IMAP_TOKEN_LITERAL:
+		fprintf (stderr, "{%u}", token->v.literal);
+		break;
+	default:
+		fprintf (stderr, "%c", (unsigned char) (token->token & 0xff));
+		break;
+	}
+}
+
+int
+camel_imap_command_step (CamelIMAPCommand *ic)
+{
+	CamelIMAPEngine *engine = ic->engine;
+	int result = CAMEL_IMAP_RESULT_NONE;
+	CamelIMAPUntaggedCallback untagged;
+	CamelIMAPLiteral *literal;
+	camel_imap_token_t token;
+	unsigned char *linebuf;
+	ssize_t nwritten;
+	size_t len;
+	int ret;
+	
+	g_assert (ic->part != NULL);
+	
+	if (ic->part == ic->parts) {
+		ic->tag = g_strdup_printf ("%c%0.5u", engine->tagprefix, engine->tag++);
+		camel_stream_printf (engine->ostream, "%s ", ic->tag);
+		d(fprintf (stderr, "sending : %s ", ic->tag));
+	}
+	
+#if d(!)0
+	{
+		int sending = ic->part != ic->parts;
+		unsigned char *eoln, *eob;
+		
+		linebuf = ic->part->buffer;
+		eob = linebuf + ic->part->buflen;
+		
+		do {
+			eoln = linebuf;
+			while (eoln < eob && *eoln != '\n')
+				eoln++;
+			
+			if (eoln < eob)
+				eoln++;
+			
+			if (sending)
+				fwrite ("sending : ", 1, 10, stderr);
+			fwrite (linebuf, 1, eoln - linebuf, stderr);
+			
+			linebuf = eoln + 1;
+			sending = 1;
+		} while (linebuf < eob);
+	}
+#endif
+	
+	linebuf = ic->part->buffer;
+	len = ic->part->buflen;
+	
+	if ((nwritten = camel_stream_write (engine->ostream, linebuf, len)) == -1)
+		goto exception;
+	
+	if (camel_stream_flush (engine->ostream) == -1)
+		goto exception;
+	
+	/* now we need to read the response(s) from the IMAP server */
+	
+	do {
+		if (camel_imap_engine_next_token (engine, &token, &ic->ex) == -1)
+			goto exception;
+		
+		if (token.token == '+') {
+			/* we got a continuation response from the server */
+			literal = ic->part->literal;
+			
+			if (camel_imap_engine_line (engine, &linebuf, &len, &ic->ex) == -1)
+				goto exception;
+			
+			if (literal) {
+				if (imap_literal_write_to_stream (literal, engine->ostream) == -1)
+					goto exception;
+				
+				g_free (linebuf);
+				linebuf = NULL;
+				
+				break;
+			} else if (ic->plus) {
+				/* command expected a '+' response - probably AUTHENTICATE? */
+				if (ic->plus (engine, ic, linebuf, len, &ic->ex) == -1) {
+					g_free (linebuf);
+					return -1;
+				}
+				
+				/* now we need to wait for a "<tag> OK/NO/BAD" response */
+			} else {
+				/* FIXME: error?? */
+				g_assert_not_reached ();
+			}
+			
+			g_free (linebuf);
+			linebuf = NULL;
+		} else if (token.token == '*') {
+			/* we got an untagged response, let the engine handle this */
+			if (camel_imap_engine_handle_untagged_1 (engine, &token, &ic->ex) == -1)
+				goto exception;
+		} else if (token.token == CAMEL_IMAP_TOKEN_ATOM && !strcmp (token.v.atom, ic->tag)) {
+			/* we got "<tag> OK/NO/BAD" */
+			fprintf (stderr, "got %s response\n", token.v.atom);
+			
+			if (camel_imap_engine_next_token (engine, &token, &ic->ex) == -1)
+				goto exception;
+			
+			if (token.token == CAMEL_IMAP_TOKEN_ATOM) {
+				if (!strcmp (token.v.atom, "OK"))
+					result = CAMEL_IMAP_RESULT_OK;
+				else if (!strcmp (token.v.atom, "NO"))
+					result = CAMEL_IMAP_RESULT_NO;
+				else if (!strcmp (token.v.atom, "BAD"))
+					result = CAMEL_IMAP_RESULT_BAD;
+				
+				if (result == CAMEL_IMAP_RESULT_NONE) {
+					fprintf (stderr, "expected OK/NO/BAD but got %s\n", token.v.atom);
+					goto unexpected;
+				}
+				
+				if (camel_imap_engine_next_token (engine, &token, &ic->ex) == -1)
+					goto exception;
+				
+				if (token.token == '[') {
+					/* we have a response code */
+					camel_imap_stream_unget_token (engine->istream, &token);
+					if (camel_imap_engine_parse_resp_code (engine, &ic->ex) == -1)
+						goto exception;
+				} else if (token.token != '\n') {
+					/* just gobble up the rest of the line */
+					if (camel_imap_engine_line (engine, NULL, NULL, &ic->ex) == -1)
+						goto exception;
+				}
+			} else {
+				fprintf (stderr, "expected anything but this: ");
+				unexpected_token (&token);
+				fprintf (stderr, "\n");
+				
+				goto unexpected;
+			}
+			
+			break;
+		} else {
+			fprintf (stderr, "wtf is this: ");
+			unexpected_token (&token);
+			fprintf (stderr, "\n");
+			
+		unexpected:
+			
+			/* no fucking clue what we got... */
+			if (camel_imap_engine_line (engine, &linebuf, &len, &ic->ex) == -1)
+				goto exception;
+			
+			camel_exception_setv (&ic->ex, CAMEL_EXCEPTION_SYSTEM,
+					      _("Unexpected response from IMAP server %s: %s"),
+					      engine->url->host, linebuf);
+			
+			g_free (linebuf);
+			
+			goto exception;
+		}
+	} while (1);
+	
+	/* status should always be ACTIVE here... */
+	if (ic->status == CAMEL_IMAP_COMMAND_ACTIVE) {
+		ic->part = ic->part->next;
+		if (ic->part == NULL || result) {
+			ic->status = CAMEL_IMAP_COMMAND_COMPLETE;
+			ic->result = result;
+			return 1;
+		}
+	}
+	
+	return 0;
+	
+ exception:
+	
+	ic->status = CAMEL_IMAP_COMMAND_ERROR;
+	
+	return -1;
+}
+
+
+void
+camel_imap_command_reset (CamelIMAPCommand *ic)
+{
+	int i;
+	
+	for (i = 0; i < ic->resp_codes->len; i++)
+		camel_imap_resp_code_free (ic->resp_codes->pdata[i]);
+	g_ptr_array_set_size (ic->resp_codes, 0);
+	
+	ic->status = CAMEL_IMAP_COMMAND_QUEUED;
+	ic->result = CAMEL_IMAP_RESULT_NONE;
+	ic->part = ic->parts;
+	g_free (ic->tag);
+	ic->tag = NULL;
+	
+	camel_exception_clear (&ic->ex);
+}
diff --git a/camel/providers/imap4/camel-imap-command.h b/camel/providers/imap4/camel-imap-command.h
new file mode 100644
index 000000000..af3ad9f92
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-command.h
@@ -0,0 +1,144 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __CAMEL_IMAP_COMMAND_H__
+#define __CAMEL_IMAP_COMMAND_H__
+
+#include <stdarg.h>
+
+#include <glib.h>
+
+#include <e-util/e-msgport.h>
+
+#include <camel/camel-stream.h>
+#include <camel/camel-exception.h>
+#include <camel/camel-data-wrapper.h>
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus */
+
+struct _CamelIMAPEngine;
+struct _CamelIMAPFolder;
+struct _camel_imap_token_t;
+
+typedef struct _CamelIMAPCommand CamelIMAPCommand;
+typedef struct _CamelIMAPLiteral CamelIMAPLiteral;
+
+typedef int (* CamelIMAPPlusCallback) (struct _CamelIMAPEngine *engine,
+				       CamelIMAPCommand *ic,
+				       const unsigned char *linebuf,
+				       size_t linelen, CamelException *ex);
+
+typedef int (* CamelIMAPUntaggedCallback) (struct _CamelIMAPEngine *engine,
+					   CamelIMAPCommand *ic,
+					   guint32 index,
+					   struct _camel_imap_token_t *token,
+					   CamelException *ex);
+
+enum {
+	CAMEL_IMAP_LITERAL_STRING,
+	CAMEL_IMAP_LITERAL_STREAM,
+	CAMEL_IMAP_LITERAL_WRAPPER,
+};
+
+struct _CamelIMAPLiteral {
+	int type;
+	union {
+		char *string;
+		CamelStream *stream;
+		CamelDataWrapper *wrapper;
+	} literal;
+};
+
+typedef struct _CamelIMAPCommandPart {
+	struct _CamelIMAPCommandPart *next;
+	unsigned char *buffer;
+	size_t buflen;
+	
+	CamelIMAPLiteral *literal;
+} CamelIMAPCommandPart;
+
+enum {
+	CAMEL_IMAP_COMMAND_QUEUED,
+	CAMEL_IMAP_COMMAND_ACTIVE,
+	CAMEL_IMAP_COMMAND_COMPLETE,
+	CAMEL_IMAP_COMMAND_ERROR,
+};
+
+enum {
+	CAMEL_IMAP_RESULT_NONE,
+	CAMEL_IMAP_RESULT_OK,
+	CAMEL_IMAP_RESULT_NO,
+	CAMEL_IMAP_RESULT_BAD,
+};
+
+struct _CamelIMAPCommand {
+	EDListNode node;
+	
+	struct _CamelIMAPEngine *engine;
+	
+	unsigned int ref_count:26;
+	unsigned int status:3;
+	unsigned int result:3;
+	int id;
+	
+	char *tag;
+	
+	GPtrArray *resp_codes;
+	
+	struct _CamelIMAPFolder *folder;
+	CamelException ex;
+	
+	/* command parts - logical breaks in the overall command based on literals */
+	CamelIMAPCommandPart *parts;
+	
+	/* current part */
+	CamelIMAPCommandPart *part;
+	
+	/* untagged handlers */
+	GHashTable *untagged;
+	
+	/* '+' callback/data */
+	CamelIMAPPlusCallback plus;
+	void *user_data;
+};
+
+CamelIMAPCommand *camel_imap_command_new (struct _CamelIMAPEngine *engine, struct _CamelIMAPFolder *folder,
+					  const char *format, ...);
+CamelIMAPCommand *camel_imap_command_newv (struct _CamelIMAPEngine *engine, struct _CamelIMAPFolder *folder,
+					   const char *format, va_list args);
+
+void camel_imap_command_register_untagged (CamelIMAPCommand *ic, const char *atom, CamelIMAPUntaggedCallback untagged);
+
+void camel_imap_command_ref (CamelIMAPCommand *ic);
+void camel_imap_command_unref (CamelIMAPCommand *ic);
+
+/* returns 1 when complete, 0 if there is more to do, or -1 on error */
+int camel_imap_command_step (CamelIMAPCommand *ic);
+
+void camel_imap_command_reset (CamelIMAPCommand *ic);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __CAMEL_IMAP_COMMAND_H__ */
diff --git a/camel/providers/imap4/camel-imap-engine.c b/camel/providers/imap4/camel-imap-engine.c
new file mode 100644
index 000000000..36d2e42f9
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-engine.c
@@ -0,0 +1,1642 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include <camel/camel-sasl.h>
+#include <camel/camel-stream-buffer.h>
+
+#include "camel-imap-command.h"
+#include "camel-imap-stream.h"
+#include "camel-imap-folder.h"
+#include "camel-imap-utils.h"
+
+#include "camel-imap-engine.h"
+
+#define d(x) x
+
+
+static void camel_imap_engine_class_init (CamelIMAPEngineClass *klass);
+static void camel_imap_engine_init (CamelIMAPEngine *engine, CamelIMAPEngineClass *klass);
+static void camel_imap_engine_finalize (CamelObject *object);
+
+
+static CamelObjectClass *parent_class = NULL;
+
+
+CamelType
+camel_imap_engine_get_type (void)
+{
+	static CamelType type = 0;
+	
+	if (!type) {
+		type = camel_type_register (CAMEL_TYPE_IMAP_ENGINE,
+					    "CamelIMAPEngine",
+					    sizeof (CamelIMAPEngine),
+					    sizeof (CamelIMAPEngineClass),
+					    (CamelObjectClassInitFunc) camel_imap_engine_class_init,
+					    NULL,
+					    (CamelObjectInitFunc) camel_imap_engine_init,
+					    (CamelObjectFinalizeFunc) camel_imap_engine_finalize);
+	}
+	
+	return type;
+}
+
+static void
+camel_imap_engine_class_init (CamelIMAPEngineClass *klass)
+{
+	parent_class = camel_type_get_global_classfuncs (CAMEL_OBJECT_TYPE);
+	
+	klass->tagprefix = 'A';
+}
+
+static void
+camel_imap_engine_init (CamelIMAPEngine *engine, CamelIMAPEngineClass *klass)
+{
+	engine->state = CAMEL_IMAP_ENGINE_DISCONNECTED;
+	engine->level = CAMEL_IMAP_LEVEL_UNKNOWN;
+	
+	engine->session = NULL;
+	engine->url = NULL;
+	
+	engine->istream = NULL;
+	engine->ostream = NULL;
+	
+	engine->authtypes = g_hash_table_new (g_str_hash, g_str_equal);
+	
+	engine->capa = 0;
+	
+	/* this is the suggested default, impacts the max command line length we'll send */
+	engine->maxlentype = CAMEL_IMAP_ENGINE_MAXLEN_LINE;
+	engine->maxlen = 1000;
+	
+	engine->namespaces.personal = NULL;
+	engine->namespaces.other = NULL;
+	engine->namespaces.shared = NULL;
+	
+	if (klass->tagprefix > 'Z')
+		klass->tagprefix = 'A';
+	
+	engine->tagprefix = klass->tagprefix++;
+	engine->tag = 0;
+	
+	engine->nextid = 1;
+	
+	engine->folder = NULL;
+	
+	e_dlist_init (&engine->queue);
+}
+
+static void
+imap_namespace_clear (CamelIMAPNamespace **namespace)
+{
+	CamelIMAPNamespace *node, *next;
+	
+	node = *namespace;
+	while (node != NULL) {
+		next = node->next;
+		g_free (node->path);
+		g_free (node);
+		node = next;
+	}
+	
+	*namespace = NULL;
+}
+
+static void
+camel_imap_engine_finalize (CamelObject *object)
+{
+	CamelIMAPEngine *engine = (CamelIMAPEngine *) object;
+	EDListNode *node;
+	
+	if (engine->session)
+		camel_object_unref (engine->session);
+	
+	if (engine->istream)
+		camel_object_unref (engine->istream);
+	
+	if (engine->ostream)
+		camel_object_unref (engine->ostream);
+	
+	g_hash_table_foreach (engine->authtypes, (GHFunc) g_free, NULL);
+	g_hash_table_destroy (engine->authtypes);
+	
+	imap_namespace_clear (&engine->namespaces.personal);
+	imap_namespace_clear (&engine->namespaces.other);
+	imap_namespace_clear (&engine->namespaces.shared);
+	
+	if (engine->folder)
+		camel_object_unref (engine->folder);
+	
+	while ((node = e_dlist_remhead (&engine->queue))) {
+		node->next = NULL;
+		node->prev = NULL;
+		
+		camel_imap_command_unref ((CamelIMAPCommand *) node);
+	}
+}
+
+
+/**
+ * camel_imap_engine_new:
+ * @session: session
+ * @url: service url
+ *
+ * Returns a new imap engine
+ **/
+CamelIMAPEngine *
+camel_imap_engine_new (CamelSession *session, CamelURL *url)
+{
+	CamelIMAPEngine *engine;
+	
+	g_return_val_if_fail (CAMEL_IS_SESSION (session), NULL);
+	
+	engine = (CamelIMAPEngine *) camel_object_new (CAMEL_TYPE_IMAP_ENGINE);
+	camel_object_ref (session);
+	engine->session = session;
+	engine->url = url;
+	
+	return engine;
+}
+
+
+/**
+ * camel_imap_engine_take_stream:
+ * @engine: imap engine
+ * @stream: tcp stream
+ * @ex: exception
+ *
+ * Gives ownership of @stream to @engine and reads the greeting from
+ * the stream.
+ *
+ * Returns 0 on success or -1 on fail.
+ *
+ * Note: on error, @stream will be unref'd.
+ **/
+int
+camel_imap_engine_take_stream (CamelIMAPEngine *engine, CamelStream *stream, CamelException *ex)
+{
+	camel_imap_token_t token;
+	int code;
+	
+	g_return_val_if_fail (CAMEL_IS_IMAP_ENGINE (engine), -1);
+	g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
+	
+	if (engine->istream)
+		camel_object_unref (engine->istream);
+	
+	if (engine->ostream)
+		camel_object_unref (engine->ostream);
+	
+	engine->istream = (CamelIMAPStream *) camel_imap_stream_new (stream);
+	engine->ostream = camel_stream_buffer_new (stream, CAMEL_STREAM_BUFFER_WRITE);
+	engine->state = CAMEL_IMAP_ENGINE_CONNECTED;
+	camel_object_unref (stream);
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		goto exception;
+	
+	if (token.token != '*') {
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		goto exception;
+	}
+	
+	if ((code = camel_imap_engine_handle_untagged_1 (engine, &token, ex)) == -1) {
+		goto exception;
+	} else if (code != CAMEL_IMAP_UNTAGGED_OK && code != CAMEL_IMAP_UNTAGGED_PREAUTH) {
+		/* FIXME: set an error? */
+		goto exception;
+	}
+	
+	return 0;
+	
+ exception:
+	
+	engine->state = CAMEL_IMAP_ENGINE_DISCONNECTED;
+	
+	camel_object_unref (engine->istream);
+	engine->istream = NULL;
+	camel_object_unref (engine->ostream);
+	engine->ostream = NULL;
+	
+	return -1;
+}
+
+
+/**
+ * camel_imap_engine_capability:
+ * @engine: IMAP engine
+ * @ex: exception
+ *
+ * Forces the IMAP engine to query the IMAP server for a list of capabilities.
+ *
+ * Returns 0 on success or -1 on fail.
+ **/
+int
+camel_imap_engine_capability (CamelIMAPEngine *engine, CamelException *ex)
+{
+	CamelIMAPCommand *ic;
+	int id, retval = 0;
+	
+	ic = camel_imap_engine_queue (engine, NULL, "CAPABILITY\r\n");
+	
+	while ((id = camel_imap_engine_iterate (engine)) < ic->id && id != -1)
+		;
+	
+	if (id == -1 || ic->status != CAMEL_IMAP_COMMAND_COMPLETE) {
+		camel_exception_xfer (ex, &ic->ex);
+		retval = -1;
+	}
+	
+	camel_imap_command_unref (ic);
+	
+	return retval;
+}
+
+
+/**
+ * camel_imap_engine_namespace:
+ * @engine: IMAP engine
+ * @ex: exception
+ *
+ * Forces the IMAP engine to query the IMAP server for a list of namespaces.
+ *
+ * Returns 0 on success or -1 on fail.
+ **/
+int
+camel_imap_engine_namespace (CamelIMAPEngine *engine, CamelException *ex)
+{
+	camel_imap_list_t *list;
+	GPtrArray *array = NULL;
+	CamelIMAPCommand *ic;
+	int id, i;
+	
+	if (engine->capa & CAMEL_IMAP_CAPABILITY_NAMESPACE) {
+		ic = camel_imap_engine_queue (engine, NULL, "NAMESPACE\r\n");
+	} else {
+		ic = camel_imap_engine_queue (engine, NULL, "LIST \"\" \"\"\r\n");
+		camel_imap_command_register_untagged (ic, "LIST", camel_imap_untagged_list);
+		ic->user_data = array = g_ptr_array_new ();
+	}
+	
+	while ((id = camel_imap_engine_iterate (engine)) < ic->id && id != -1)
+		;
+	
+	if (id == -1 || ic->status != CAMEL_IMAP_COMMAND_COMPLETE) {
+		camel_exception_xfer (ex, &ic->ex);
+		camel_imap_command_unref (ic);
+		return -1;
+	}
+	
+	if (array != NULL) {
+		if (ic->result == CAMEL_IMAP_RESULT_OK) {
+			CamelIMAPNamespace *namespace;
+			
+			g_assert (array->len == 1);
+			list = array->pdata[0];
+			
+			namespace = g_new (CamelIMAPNamespace, 1);
+			namespace->next = NULL;
+			namespace->path = g_strdup ("");
+			namespace->sep = list->delim;
+			
+			engine->namespaces.personal = namespace;
+		} else {
+			/* should never *ever* happen */
+		}
+		
+		for (i = 0; i < array->len; i++) {
+			list = array->pdata[i];
+			g_free (list->name);
+			g_free (list);
+		}
+		
+		g_ptr_array_free (array, TRUE);
+	}
+	
+	camel_imap_command_unref (ic);
+	
+	return 0;
+}
+
+
+int
+camel_imap_engine_select_folder (CamelIMAPEngine *engine, CamelFolder *folder, CamelException *ex)
+{
+	CamelIMAPRespCode *resp;
+	CamelIMAPCommand *ic;
+	int id, retval = 0;
+	int i;
+	
+	g_return_val_if_fail (CAMEL_IS_IMAP_ENGINE (engine), -1);
+	g_return_val_if_fail (CAMEL_IS_IMAP_FOLDER (folder), -1);
+	
+	/* POSSIBLE FIXME: if the folder to be selected will already
+	 * be selected by the time the queue is emptied, simply
+	 * no-op? */
+	
+	ic = camel_imap_engine_queue (engine, folder, "SELECT %F\r\n", folder);
+	while ((id = camel_imap_engine_iterate (engine)) < ic->id && id != -1)
+		;
+	
+	if (id == -1 || ic->status != CAMEL_IMAP_COMMAND_COMPLETE) {
+		camel_exception_xfer (ex, &ic->ex);
+		camel_imap_command_unref (ic);
+		return -1;
+	}
+	
+	switch (ic->result) {
+	case CAMEL_IMAP_RESULT_OK:
+		/*folder->mode = 0;*/
+		for (i = 0; i < ic->resp_codes->len; i++) {
+			resp = ic->resp_codes->pdata[i];
+			switch (resp->code) {
+			case CAMEL_IMAP_RESP_CODE_PERM_FLAGS:
+				folder->permanent_flags = resp->v.flags;
+				break;
+			case CAMEL_IMAP_RESP_CODE_READONLY:
+				/*folder->mode = CAMEL_FOLDER_MODE_READ_ONLY;*/
+				break;
+			case CAMEL_IMAP_RESP_CODE_READWRITE:
+				/*folder->mode = CAMEL_FOLDER_MODE_READ_WRITE;*/
+				break;
+			case CAMEL_IMAP_RESP_CODE_UIDNEXT:
+				camel_imap_summary_set_uidnext (folder->summary, resp->v.uidnext);
+				break;
+			case CAMEL_IMAP_RESP_CODE_UIDVALIDITY:
+				camel_imap_summary_set_uidvalidity (folder->summary, resp->v.uidvalidity);
+				break;
+			case CAMEL_IMAP_RESP_CODE_UNSEEN:
+				camel_imap_summary_set_unseen (folder->summary, resp->v.unseen);
+				break;
+			default:
+				break;
+			}
+		}
+		
+		/*if (folder->mode == 0) {
+		  folder->mode = CAMEL_FOLDER_MODE_READ_ONLY;
+		  g_warning ("Expected to find [READ-ONLY] or [READ-WRITE] in SELECT response");
+		  }*/
+		
+		break;
+	case CAMEL_IMAP_RESULT_NO:
+		/* FIXME: would be good to save the NO reason into the err message */
+		camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+				      _("Cannot select folder `%s': Invalid mailbox name"),
+				      folder->full_name);
+		retval = -1;
+		break;
+	case CAMEL_IMAP_RESULT_BAD:
+		camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+				      _("Cannot select folder `%s': Bad command"),
+				      folder->full_name);
+		retval = -1;
+		break;
+	default:
+		g_assert_not_reached ();
+		retval = -1;
+	}
+	
+	camel_imap_command_unref (ic);
+	
+	return retval;
+}
+
+
+static struct {
+	const char *name;
+	guint32 flag;
+} imap_capabilities[] = {
+	{ "IMAP4",         CAMEL_IMAP_CAPABILITY_IMAP4         },
+	{ "IMAP4REV1",     CAMEL_IMAP_CAPABILITY_IMAP4REV1     },
+	{ "STATUS",        CAMEL_IMAP_CAPABILITY_STATUS        },
+	{ "NAMESPACE",     CAMEL_IMAP_CAPABILITY_NAMESPACE     },
+	{ "UIDPLUS",       CAMEL_IMAP_CAPABILITY_UIDPLUS       },
+	{ "LITERAL+",      CAMEL_IMAP_CAPABILITY_LITERALPLUS   },
+	{ "LOGINDISABLED", CAMEL_IMAP_CAPABILITY_LOGINDISABLED },
+	{ "STARTTLS",      CAMEL_IMAP_CAPABILITY_STARTTLS      },
+	{ NULL,            0                                    }
+};
+
+static gboolean
+auth_free (gpointer key, gpointer value, gpointer user_data)
+{
+	g_free (key);
+	return TRUE;
+}
+
+static int
+engine_parse_capability (CamelIMAPEngine *engine, int sentinel, CamelException *ex)
+{
+	camel_imap_token_t token;
+	int i;
+	
+	engine->capa = CAMEL_IMAP_CAPABILITY_utf8_search;
+	engine->level = 0;
+	
+	g_hash_table_foreach_remove (engine->authtypes, (GHRFunc) auth_free, NULL);
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	while (token.token == CAMEL_IMAP_TOKEN_ATOM) {
+		if (!strncasecmp ("AUTH=", token.v.atom, 5)) {
+			CamelServiceAuthType *auth;
+			
+			if ((auth = camel_sasl_authtype (token.v.atom + 5)) != NULL)
+				g_hash_table_insert (engine->authtypes, g_strdup (token.v.atom + 5), auth);
+		} else {
+			for (i = 0; imap_capabilities[i].name; i++) {
+				if (!strcasecmp (imap_capabilities[i].name, token.v.atom))
+					engine->capa |= imap_capabilities[i].flag;
+			}
+		}
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+	}
+	
+	if (token.token != sentinel) {
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	/* unget our sentinel token */
+	camel_imap_stream_unget_token (engine->istream, &token);
+	
+	/* figure out which version of IMAP we are dealing with */
+	if (engine->capa & CAMEL_IMAP_CAPABILITY_IMAP4REV1) {
+		engine->level = CAMEL_IMAP_LEVEL_IMAP4REV1;
+		engine->capa |= CAMEL_IMAP_CAPABILITY_STATUS;
+	} else if (engine->capa & CAMEL_IMAP_CAPABILITY_IMAP4) {
+		engine->level = CAMEL_IMAP_LEVEL_IMAP4;
+	} else {
+		engine->level = CAMEL_IMAP_LEVEL_UNKNOWN;
+	}
+	
+	return 0;
+}
+
+static int
+engine_parse_flags_list (CamelIMAPEngine *engine, CamelIMAPRespCode *resp, int perm, CamelException *ex)
+{
+	guint32 flags = 0;
+	
+	if (camel_imap_parse_flags_list (engine, &flags, ex) == -1)
+		return-1;
+	
+	if (resp != NULL)
+		resp->v.flags = flags;
+	
+	if (engine->current && engine->current->folder) {
+		if (perm)
+			((CamelFolder *) engine->current->folder)->permanent_flags = flags;
+		/*else
+		  ((CamelFolder *) engine->current->folder)->folder_flags = flags;*/
+	} else if (engine->folder) {
+		if (perm)
+			((CamelFolder *) engine->folder)->permanent_flags = flags;
+		/*else
+		  ((CamelFolder *) engine->folder)->folder_flags = flags;*/
+	} else {
+		fprintf (stderr, "We seem to be in a bit of a pickle. we've just parsed an untagged %s\n"
+			 "response for a folder, yet we do not currently have a folder selected?\n",
+			 perm ? "PERMANENTFLAGS" : "FLAGS");
+	}
+	
+	return 0;
+}
+
+static int
+engine_parse_flags (CamelIMAPEngine *engine, CamelException *ex)
+{
+	camel_imap_token_t token;
+	
+	if (engine_parse_flags_list (engine, NULL, FALSE, ex) == -1)
+		return -1;
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	if (token.token != '\n') {
+		d(fprintf (stderr, "Expected to find a '\\n' token after the FLAGS response\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	return 0;
+}
+
+
+enum {
+	IMAP_STATUS_MESSAGES,
+	IMAP_STATUS_RECENT,
+	IMAP_STATUS_UIDNEXT,
+	IMAP_STATUS_UIDVALIDITY,
+	IMAP_STATUS_UNSEEN,
+	IMAP_STATUS_UNKNOWN
+};
+
+static struct {
+	const char *name;
+	int type;
+} imap_status[] = {
+	{ "MESSAGES",    IMAP_STATUS_MESSAGES    },
+	{ "RECENT",      IMAP_STATUS_RECENT      },
+	{ "UIDNEXT",     IMAP_STATUS_UIDNEXT     },
+	{ "UIDVALIDITY", IMAP_STATUS_UIDVALIDITY },
+	{ "UNSEEN",      IMAP_STATUS_UNSEEN      },
+	{ NULL,          IMAP_STATUS_UNKNOWN     },
+};
+
+static int
+engine_parse_status (CamelIMAPEngine *engine, CamelException *ex)
+{
+	camel_imap_token_t token;
+	char *mailbox;
+	int type;
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	switch (token.token) {
+	case CAMEL_IMAP_TOKEN_ATOM:
+		mailbox = g_strdup (token.v.atom);
+		break;
+	case CAMEL_IMAP_TOKEN_QSTRING:
+		mailbox = g_strdup (token.v.qstring);
+		break;
+	case CAMEL_IMAP_TOKEN_LITERAL:
+		/* FIXME: can this happen? if so implement it */
+	default:
+		fprintf (stderr, "Unexpected token in IMAP untagged STATUS response: %s%c\n",
+			 token.token == CAMEL_IMAP_TOKEN_NIL ? "NIL" : "",
+			 (unsigned char) (token.token & 0xff));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1) {
+		g_free (mailbox);
+		return -1;
+	}
+	
+	if (token.token != '(') {
+		d(fprintf (stderr, "Expected to find a '(' token after the mailbox token in the STATUS response\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		g_free (mailbox);
+		return -1;
+	}
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1) {
+		g_free (mailbox);
+		return -1;
+	}
+	
+	while (token.token == CAMEL_IMAP_TOKEN_ATOM) {
+		const unsigned char *inptr;
+		unsigned int v = 0;
+		
+		/* parse the status messages list */
+		for (type = 0; imap_status[type].name; type++) {
+			if (!strcasecmp (imap_status[type].name, token.v.atom))
+				break;
+		}
+		
+		if (type == IMAP_STATUS_UNKNOWN)
+			fprintf (stderr, "unrecognized token in STATUS list: %s\n", token.v.atom);
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1) {
+			g_free (mailbox);
+			return -1;
+		}
+		
+		if (token.token != CAMEL_IMAP_TOKEN_ATOM)
+			break;
+		
+		if (type == IMAP_STATUS_UIDNEXT || type == IMAP_STATUS_UIDVALIDITY) {
+			/* these tokens should be numeric, but we
+			 * treat them as strings internally so we are
+			 * special-casing them here */
+			
+			/* FIXME: save the UIDNEXT/UIDVALIDITY value */
+		} else {
+			inptr = (const unsigned char *) token.v.atom;
+			while (*inptr && isdigit ((int) *inptr) && v < (UINT_MAX / 10))
+				v = (v * 10) + (*inptr++ - '0');
+			
+			if (*inptr != '\0') {
+				if (type == IMAP_STATUS_UNKNOWN) {
+					/* we'll let it slide... unget this token and continue */
+					camel_imap_stream_unget_token (engine->istream, &token);
+					goto loop;
+				}
+				
+				d(fprintf (stderr, "Encountered non-numeric token after %s in untagged STATUS response: %s\n",
+					   imap_status[type].name, token.v.atom));
+				goto loop;
+			}
+			
+			switch (type) {
+			case IMAP_STATUS_MESSAGES:
+				/* FIXME: save value */
+				break;
+			case IMAP_STATUS_RECENT:
+				/* FIXME: save value */
+				break;
+			case IMAP_STATUS_UNSEEN:
+				/* FIXME: save value */
+				break;
+			default:
+				g_assert_not_reached ();
+			}
+		}
+		
+	loop:
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1) {
+			g_free (mailbox);
+			return -1;
+		}
+	}
+	
+	/* don't need this anymore... */
+	g_free (mailbox);
+	
+	if (token.token != ')') {
+		d(fprintf (stderr, "Expected to find a ')' token terminating the untagged STATUS response\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	if (token.token != '\n') {
+		d(fprintf (stderr, "Expected to find a '\\n' token after the STATUS response\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	return 0;
+}
+
+static int
+engine_parse_namespace (CamelIMAPEngine *engine, CamelException *ex)
+{
+	CamelIMAPNamespace *namespaces[3], *node, *tail;
+	camel_imap_token_t token;
+	int i, n = 0;
+	
+	imap_namespace_clear (&engine->namespaces.personal);
+	imap_namespace_clear (&engine->namespaces.other);
+	imap_namespace_clear (&engine->namespaces.shared);
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	do {
+		namespaces[n] = NULL;
+		tail = (CamelIMAPNamespace *) &namespaces[n];
+		
+		if (token.token == '(') {
+			/* decode the list of namespace pairs */
+			if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+				goto exception;
+			
+			while (token.token == '(') {
+				/* decode a namespace pair */
+				
+				/* get the path name token */
+				if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+					goto exception;
+				
+				if (token.token != CAMEL_IMAP_TOKEN_QSTRING) {
+					d(fprintf (stderr, "Expected to find a qstring token as first element in NAMESPACE pair\n"));
+					camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+					goto exception;
+				}
+				
+				node = g_new (CamelIMAPNamespace, 1);
+				node->next = NULL;
+				node->path = g_strdup (token.v.qstring);
+				
+				/* get the path delimiter token */
+				if (camel_imap_engine_next_token (engine, &token, ex) == -1) {
+					g_free (node->path);
+					g_free (node);
+					
+					goto exception;
+				}
+				
+				if (token.token != CAMEL_IMAP_TOKEN_QSTRING || strlen (token.v.qstring) > 1) {
+					d(fprintf (stderr, "Expected to find a qstring token as second element in NAMESPACE pair\n"));
+					camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+					g_free (node->path);
+					g_free (node);
+					
+					goto exception;
+				}
+				
+				node->sep = *token.v.qstring;
+				tail->next = node;
+				tail = node;
+				
+				/* canonicalise the namespace path */
+				if (node->path[strlen (node->path) - 1] == node->sep)
+					node->path[strlen (node->path) - 1] = '\0';
+				
+				/* get the closing ')' for this namespace pair */
+				if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+					goto exception;
+				
+				if (token.token != ')') {
+					d(fprintf (stderr, "Expected to find a ')' token to close the current namespace pair\n"));
+					camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+					
+					goto exception;
+				}
+				
+				/* get the next token (should be either '(' or ')') */
+				if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+					goto exception;
+			}
+			
+			if (token.token != ')') {
+				d(fprintf (stderr, "Expected to find a ')' to close the current namespace list\n"));
+				camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+				goto exception;
+			}
+		} else if (token.token == CAMEL_IMAP_TOKEN_NIL) {
+			/* namespace list is NIL */
+			namespaces[n] = NULL;
+		} else {
+			d(fprintf (stderr, "Expected to find either NIL or '(' token in untagged NAMESPACE response\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		/* get the next token (should be either '(', NIL, or '\n') */
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			goto exception;
+		
+		n++;
+	} while (n < 3);
+	
+	engine->namespaces.personal = namespaces[0];
+	engine->namespaces.other = namespaces[1];
+	engine->namespaces.shared = namespaces[2];
+	
+	return 0;
+	
+ exception:
+	
+	for (i = 0; i <= n; i++)
+		imap_namespace_clear (&namespaces[i]);
+	
+	return -1;
+}
+
+
+/**
+ * 
+ * resp-text-code  = "ALERT" /
+ *                   "BADCHARSET" [SP "(" astring *(SP astring) ")" ] /
+ *                   capability-data / "PARSE" /
+ *                   "PERMANENTFLAGS" SP "(" [flag-perm *(SP flag-perm)] ")" /
+ *                   "READ-ONLY" / "READ-WRITE" / "TRYCREATE" /
+ *                   "UIDNEXT" SP nz-number / "UIDVALIDITY" SP nz-number /
+ *                   "UNSEEN" SP nz-number /
+ *                   atom [SP 1*<any TEXT-CHAR except "]">]
+ **/
+
+static struct {
+	const char *name;
+	camel_imap_resp_code_t code;
+	int save;
+} imap_resp_codes[] = {
+	{ "ALERT",          CAMEL_IMAP_RESP_CODE_ALERT,       0 },
+	{ "BADCHARSET",     CAMEL_IMAP_RESP_CODE_BADCHARSET,  0 },
+	{ "CAPABILITY",     CAMEL_IMAP_RESP_CODE_CAPABILITY,  0 },
+	{ "PARSE",          CAMEL_IMAP_RESP_CODE_PARSE,       1 },
+	{ "PERMANENTFLAGS", CAMEL_IMAP_RESP_CODE_PERM_FLAGS,  1 },
+	{ "READ-ONLY",      CAMEL_IMAP_RESP_CODE_READONLY,    1 },
+	{ "READ-WRITE",     CAMEL_IMAP_RESP_CODE_READWRITE,   1 },
+	{ "TRYCREATE",      CAMEL_IMAP_RESP_CODE_TRYCREATE,   1 },
+	{ "UIDNEXT",        CAMEL_IMAP_RESP_CODE_UIDNEXT,     1 },
+	{ "UIDVALIDITY",    CAMEL_IMAP_RESP_CODE_UIDVALIDITY, 1 },
+	{ "UNSEEN",         CAMEL_IMAP_RESP_CODE_UNSEEN,      1 },
+	{ "NEWNAME",        CAMEL_IMAP_RESP_CODE_NEWNAME,     1 },
+	{ "APPENDUID",      CAMEL_IMAP_RESP_CODE_APPENDUID,   1 },
+	{ "COPYUID",        CAMEL_IMAP_RESP_CODE_COPYUID,     1 },
+	{ NULL,             CAMEL_IMAP_RESP_CODE_UNKNOWN,     0 }
+};
+
+
+int
+camel_imap_engine_parse_resp_code (CamelIMAPEngine *engine, CamelException *ex)
+{
+	CamelIMAPRespCode *resp = NULL;
+	camel_imap_resp_code_t code;
+	camel_imap_token_t token;
+	unsigned char *linebuf;
+	size_t len;
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	if (token.token != '[') {
+		d(fprintf (stderr, "Expected a '[' token (followed by a RESP-CODE)\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	if (token.token != CAMEL_IMAP_TOKEN_ATOM) {
+		d(fprintf (stderr, "Expected an atom token containing a RESP-CODE\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	if (token.v.atom[strlen (token.v.atom) - 1] == ']') {
+		/* split this atom ("FOO]") into 2 tokens: "FOO" and "]" */
+		token.token = ']';
+		token.v.atom[strlen (token.v.atom) - 1] = '\0';
+		camel_imap_stream_unget_token (engine->istream, &token);
+		token.token = CAMEL_IMAP_TOKEN_ATOM;
+	}
+	
+	for (code = 0; imap_resp_codes[code].name; code++) {
+		if (!strcmp (imap_resp_codes[code].name, token.v.atom)) {
+			if (engine->current && imap_resp_codes[code].save) {
+				resp = g_new0 (CamelIMAPRespCode, 1);
+				resp->code = code;
+			}
+			break;
+		}
+	}
+	
+	switch (code) {
+	case CAMEL_IMAP_RESP_CODE_BADCHARSET:
+		/* apparently we don't support UTF-8 afterall */
+		engine->capa &= ~CAMEL_IMAP_CAPABILITY_utf8_search;
+		break;
+	case CAMEL_IMAP_RESP_CODE_CAPABILITY:
+		/* capability list follows */
+		if (engine_parse_capability (engine, ']', ex) == -1)
+			goto exception;
+		break;
+	case CAMEL_IMAP_RESP_CODE_PERM_FLAGS:
+		/* flag list follows */
+		if (engine_parse_flags_list (engine, resp, TRUE, ex) == -1)
+			goto exception;
+		break;
+	case CAMEL_IMAP_RESP_CODE_READONLY:
+		break;
+	case CAMEL_IMAP_RESP_CODE_READWRITE:
+		break;
+	case CAMEL_IMAP_RESP_CODE_TRYCREATE:
+		break;
+	case CAMEL_IMAP_RESP_CODE_UIDNEXT:
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			goto exception;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_NUMBER) {
+			d(fprintf (stderr, "Expected an nz_number token as an argument to the UIDNEXT RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.uidnext = token.v.number;
+		
+		break;
+	case CAMEL_IMAP_RESP_CODE_UIDVALIDITY:
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			goto exception;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_NUMBER) {
+			d(fprintf (stderr, "Expected an nz_number token as an argument to the UIDVALIDITY RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.uidvalidity = token.v.number;
+		
+		break;
+	case CAMEL_IMAP_RESP_CODE_UNSEEN:
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_NUMBER) {
+			d(fprintf (stderr, "Expected an nz_number token as an argument to the UNSEEN RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.unseen = token.v.number;
+		
+		break;
+	case CAMEL_IMAP_RESP_CODE_NEWNAME:
+		/* this RESP-CODE may actually be removed - see here:
+		 * http://www.washington.edu/imap/listarch/2001/msg00058.html */
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_ATOM && token.token != CAMEL_IMAP_TOKEN_QSTRING) {
+			d(fprintf (stderr, "Expected an atom or qstring token as the first argument to the NEWNAME RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.newname[0] = g_strdup (token.v.atom);
+		
+		if (token.token != CAMEL_IMAP_TOKEN_ATOM && token.token != CAMEL_IMAP_TOKEN_QSTRING) {
+			d(fprintf (stderr, "Expected an atom or qstring token as the second argument to the NEWNAME RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.newname[1] = g_strdup (token.v.atom);
+		
+		break;
+	case CAMEL_IMAP_RESP_CODE_APPENDUID:
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_NUMBER) {
+			d(fprintf (stderr, "Expected an nz_number token as the first argument to the APPENDUID RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.appenduid.uidvalidity = token.v.number;
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_NUMBER) {
+			d(fprintf (stderr, "Expected an nz_number token as the second argument to the APPENDUID RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.appenduid.uid = token.v.number;
+		
+		break;
+	case CAMEL_IMAP_RESP_CODE_COPYUID:
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_NUMBER) {
+			d(fprintf (stderr, "Expected an nz_number token as the first argument to the COPYUID RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.copyuid.uidvalidity = token.v.number;
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_ATOM) {
+			d(fprintf (stderr, "Expected an atom token as the second argument to the COPYUID RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (resp != NULL)
+			resp->v.copyuid.srcset = g_strdup (token.v.atom);
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token != CAMEL_IMAP_TOKEN_ATOM) {
+			d(fprintf (stderr, "Expected an atom token as the third argument to the APPENDUID RESP-CODE\n"));
+			camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+			goto exception;
+		}
+		
+		if (token.v.atom[strlen (token.v.atom) - 1] == ']') {
+			/* this should be the case, but if not - no big. */
+			token.token = ']';
+			token.v.atom[strlen (token.v.atom) - 1] = '\0';
+			camel_imap_stream_unget_token (engine->istream, &token);
+			token.token = CAMEL_IMAP_TOKEN_ATOM;
+		}
+		
+		if (resp != NULL)
+			resp->v.copyuid.destset = g_strdup (token.v.atom);
+		
+		break;
+	default:
+		d(fprintf (stderr, "Unknown RESP-CODE encountered: %s\n", token.v.atom));
+		
+		/* extensions are of the form: "[" atom [SPACE 1*<any TEXT_CHAR except "]">] "]" */
+		
+		/* eat up the TEXT_CHARs, being careful to check atoms for a trailing ']' */
+		while (token.token != ']' && token.token != '\n') {
+			if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+				goto exception;
+			
+			if (token.token == CAMEL_IMAP_TOKEN_ATOM) {
+				if (token.v.atom[strlen (token.v.atom) - 1] == ']') {
+					token.token = ']';
+					break;
+				}
+			}
+		}
+		
+		break;
+	}
+	
+	while (token.token != ']' && token.token != '\n') {
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			goto exception;
+	}
+	
+	if (token.token != ']') {
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		d(fprintf (stderr, "Expected to find a ']' token after the RESP-CODE\n"));
+		return -1;
+	}
+	
+	if (code == CAMEL_IMAP_RESP_CODE_ALERT) {
+		if (camel_imap_engine_line (engine, &linebuf, &len, ex) == -1)
+			goto exception;
+		
+		camel_session_alert_user (engine->session, CAMEL_SESSION_ALERT_INFO, linebuf, FALSE);
+		g_free (linebuf);
+	} else if (resp != NULL && code == CAMEL_IMAP_RESP_CODE_PARSE) {
+		if (camel_imap_engine_line (engine, &linebuf, &len, ex) == -1)
+			goto exception;
+		
+		resp->v.parse = linebuf;
+	} else {
+		/* eat up the rest of the response */
+		if (camel_imap_engine_line (engine, NULL, NULL, ex) == -1)
+			goto exception;
+	}
+	
+	if (resp != NULL)
+		g_ptr_array_add (engine->current->resp_codes, resp);
+	
+	return 0;
+	
+ exception:
+	
+	if (resp != NULL)
+		camel_imap_resp_code_free (resp);
+	
+	return -1;
+}
+
+
+
+/* returns -1 on error, or one of CAMEL_IMAP_UNTAGGED_[OK,NO,BAD,PREAUTH,HANDLED] on success */
+int
+camel_imap_engine_handle_untagged_1 (CamelIMAPEngine *engine, camel_imap_token_t *token, CamelException *ex)
+{
+	int code = CAMEL_IMAP_UNTAGGED_HANDLED;
+	CamelIMAPCommand *ic = engine->current;
+	CamelIMAPUntaggedCallback untagged;
+	CamelFolder *folder;
+	unsigned int v;
+	
+	if (camel_imap_engine_next_token (engine, token, ex) == -1)
+		return -1;
+	
+	if (token->token == CAMEL_IMAP_TOKEN_ATOM) {
+		if (!strcmp ("BYE", token->v.atom)) {
+			/* we don't care if we fail here, either way we've been disconnected */
+			camel_imap_engine_parse_resp_code (engine, NULL);
+			engine->state = CAMEL_IMAP_ENGINE_DISCONNECTED;
+			
+			/* FIXME: emit a "disconnected" signal for our Store?
+			 * The Store could then initiate a reconnect if
+			 * desirable. */
+			
+			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+					      _("IMAP server %s unexpectedly disconnected: %s"),
+					      engine->url->host, _("Got BYE response"));
+			
+			return -1;
+		} else if (!strcmp ("CAPABILITY", token->v.atom)) {
+			/* capability tokens follow */
+			if (engine_parse_capability (engine, '\n', ex) == -1)
+				return -1;
+			
+			/* find the eoln token */
+			if (camel_imap_engine_next_token (engine, token, ex) == -1)
+				return -1;
+			
+			if (token->token != '\n') {
+				camel_imap_utils_set_unexpected_token_error (ex, engine, token);
+				return -1;
+			}
+		} else if (!strcmp ("FLAGS", token->v.atom)) {
+			/* flags list follows */
+			if (engine_parse_flags (engine, ex) == -1)
+				return -1;
+		} else if (!strcmp ("NAMESPACE", token->v.atom)) {
+			if (engine_parse_namespace (engine, ex) == -1)
+				return -1;
+		} else if (!strcmp ("NO", token->v.atom) || !strcmp ("BAD", token->v.atom)) {
+			code = !strcmp ("NO", token->v.atom) ? CAMEL_IMAP_UNTAGGED_NO : CAMEL_IMAP_UNTAGGED_BAD;
+			
+			/* our command has been rejected */
+			if (camel_imap_engine_next_token (engine, token, ex) == -1)
+				return -1;
+			
+			if (token->token == '[') {
+				/* we have a resp code */
+				camel_imap_stream_unget_token (engine->istream, token);
+				if (camel_imap_engine_parse_resp_code (engine, ex) == -1)
+					return -1;
+			} else if (token->token != '\n') {
+				/* we just have resp text */
+				if (camel_imap_engine_line (engine, NULL, NULL, ex) == -1)
+					return -1;
+			}
+		} else if (!strcmp ("OK", token->v.atom)) {
+			code = CAMEL_IMAP_UNTAGGED_OK;
+			
+			if (engine->state == CAMEL_IMAP_ENGINE_CONNECTED) {
+				/* initial server greeting */
+				engine->state = CAMEL_IMAP_ENGINE_PREAUTH;
+			}
+			
+			if (camel_imap_engine_next_token (engine, token, ex) == -1)
+				return -1;
+			
+			if (token->token == '[') {
+				/* we have a resp code */
+				camel_imap_stream_unget_token (engine->istream, token);
+				if (camel_imap_engine_parse_resp_code (engine, ex) == -1)
+					return -1;
+			} else {
+				/* we just have resp text */
+				if (camel_imap_engine_line (engine, NULL, NULL, ex) == -1)
+					return -1;
+			}
+		} else if (!strcmp ("PREAUTH", token->v.atom)) {
+			code = CAMEL_IMAP_UNTAGGED_PREAUTH;
+			
+			if (engine->state == CAMEL_IMAP_ENGINE_CONNECTED)
+				engine->state = CAMEL_IMAP_ENGINE_AUTHENTICATED;
+			
+			if (camel_imap_engine_parse_resp_code (engine, ex) == -1)
+				return -1;
+		} else if (!strcmp ("STATUS", token->v.atom)) {
+			/* FIXME: This should probably be removed... leave it
+			 * up to the caller that sent the STATUS command to
+			 * register an untagged response handler for this */
+			
+			/* next token must be the mailbox name followed by a paren list */
+			if (engine_parse_status (engine, ex) == -1)
+				return -1;
+		} else if (ic && (untagged = g_hash_table_lookup (ic->untagged, token->v.atom))) {
+			/* registered untagged handler for imap command */
+			if (untagged (engine, ic, 0, token, ex) == -1)
+				return -1;
+		} else {
+			d(fprintf (stderr, "Unhandled atom token in untagged response: %s", token->v.atom));
+			
+			if (camel_imap_engine_eat_line (engine, ex) == -1)
+				return -1;
+		}
+	} else if (token->token == CAMEL_IMAP_TOKEN_NUMBER) {
+		/* we probably have something like "* 1 EXISTS" */
+		v = token->v.number;
+		
+		if (camel_imap_engine_next_token (engine, token, ex) == -1)
+			return -1;
+		
+		if (token->token != CAMEL_IMAP_TOKEN_ATOM) {
+			camel_imap_utils_set_unexpected_token_error (ex, engine, token);
+			
+			return -1;
+		}
+		
+		/* which folder is this EXISTS/EXPUNGE/RECENT acting on? */
+		if (engine->current && engine->current->folder)
+			folder = (CamelFolder *) engine->current->folder;
+		else if (engine->folder)
+			folder = (CamelFolder *) engine->folder;
+		else
+			folder = NULL;
+		
+		/* NOTE: these can be over-ridden by a registered untagged response handler */
+		if (!strcmp ("EXISTS", token->v.atom)) {
+			camel_imap_summary_set_exists (folder->summary, v);
+		} else if (!strcmp ("EXPUNGE", token->v.atom)) {
+			camel_imap_summary_expunge (folder->summary, (int) v);
+		} else if (!strcmp ("RECENT", token->v.atom)) {
+			camel_imap_summary_set_recent (folder->summary, v);
+		} else if (ic && (untagged = g_hash_table_lookup (ic->untagged, token->v.atom))) {
+			/* registered untagged handler for imap command */
+			if (untagged (engine, ic, v, token, ex) == -1)
+				return -1;
+		} else {
+			d(fprintf (stderr, "Unrecognized untagged response: * %u %s\n", v, token->v.atom));
+		}
+		
+		/* find the eoln token */
+		if (camel_imap_engine_eat_line (engine, ex) == -1)
+			return -1;
+	} else {
+		camel_imap_utils_set_unexpected_token_error (ex, engine, token);
+		
+		return -1;
+	}
+	
+	return code;
+}
+
+
+void
+camel_imap_engine_handle_untagged (CamelIMAPEngine *engine, CamelException *ex)
+{
+	camel_imap_token_t token;
+	
+	g_return_if_fail (CAMEL_IS_IMAP_ENGINE (engine));
+	
+	do {
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			goto exception;
+		
+		if (token.token != '*')
+			break;
+		
+		if (camel_imap_engine_handle_untagged_1 (engine, &token, ex) == -1)
+			goto exception;
+	} while (1);
+	
+	camel_imap_stream_unget_token (engine->istream, &token);
+	
+	return;
+	
+ exception:
+	
+	engine->state = CAMEL_IMAP_ENGINE_DISCONNECTED;
+}
+
+
+static int
+imap_process_command (CamelIMAPEngine *engine, CamelIMAPCommand *ic)
+{
+	int retval;
+	
+	while ((retval = camel_imap_command_step (ic)) == 0)
+		;
+	
+	if (retval == -1) {
+		engine->state = CAMEL_IMAP_ENGINE_DISCONNECTED;
+		return -1;
+	}
+	
+	return 0;
+}
+
+
+static void
+engine_prequeue_folder_select (CamelIMAPEngine *engine)
+{
+	CamelIMAPCommand *ic;
+	const char *cmd;
+	
+	ic = (CamelIMAPCommand *) engine->queue.head;
+	cmd = (const char *) ic->parts->buffer;
+	
+	if (!ic->folder || ic->folder == engine->folder ||
+	    !strncmp (cmd, "SELECT ", 7) || !strncmp (cmd, "EXAMINE ", 8)) {
+		/* no need to pre-queue a SELECT */
+		return;
+	}
+	
+	/* we need to pre-queue a SELECT */
+	ic = camel_imap_command_new (engine, ic->folder, "SELECT %F\r\n", ic->folder);
+	camel_imap_engine_prequeue (engine, ic);
+	ic->user_data = engine;
+	
+	camel_imap_command_unref (ic);
+}
+
+
+static int
+engine_state_change (CamelIMAPEngine *engine, CamelIMAPCommand *ic)
+{
+	const char *cmd;
+	int retval = 0;
+	
+	cmd = ic->parts->buffer;
+	if (!strncmp (cmd, "SELECT ", 7) || !strncmp (cmd, "EXAMINE ", 8)) {
+		if (ic->result == CAMEL_IMAP_RESULT_OK) {
+			/* Update the selected folder */
+			camel_object_ref (ic->folder);
+			if (engine->folder)
+				camel_object_unref (engine->folder);
+			engine->folder = ic->folder;
+			
+			engine->state = CAMEL_IMAP_ENGINE_SELECTED;
+		} else if (ic->user_data == engine) {
+			/* the engine pre-queued this SELECT command */
+			retval = -1;
+		}
+	} else if (!strncmp (cmd, "CLOSE", 5)) {
+		if (ic->result == CAMEL_IMAP_RESULT_OK)
+			engine->state = CAMEL_IMAP_ENGINE_AUTHENTICATED;
+	} else if (!strncmp (cmd, "LOGOUT", 6)) {
+		engine->state = CAMEL_IMAP_ENGINE_DISCONNECTED;
+	}
+	
+	return retval;
+}
+
+/**
+ * camel_imap_engine_iterate:
+ * @engine: IMAP engine
+ *
+ * Processes the first command in the queue.
+ *
+ * Returns the id of the processed command, 0 if there were no
+ * commands to process, or -1 on error.
+ *
+ * Note: more details on the error will be held on the
+ * CamelIMAPCommand that failed.
+ **/
+int
+camel_imap_engine_iterate (CamelIMAPEngine *engine)
+{
+	CamelIMAPCommand *ic, *nic;
+	GPtrArray *resp_codes;
+	int retval = -1;
+	
+	if (e_dlist_empty (&engine->queue))
+		return 0;
+	
+	/* check to see if we need to pre-queue a SELECT, if so do it */
+	engine_prequeue_folder_select (engine);
+	
+	engine->current = ic = (CamelIMAPCommand *) e_dlist_remhead (&engine->queue);
+	ic->status = CAMEL_IMAP_COMMAND_ACTIVE;
+	
+	if (imap_process_command (engine, ic) != -1) {
+		if (engine_state_change (engine, ic) == -1) {
+			/* This can ONLY happen if @ic was the pre-queued SELECT command
+			 * and it got a NO or BAD response.
+			 *
+			 * We have to pop the next imap command or we'll get into an
+			 * infinite loop. In order to provide @nic's owner with as much
+			 * information as possible, we move all @ic status information
+			 * over to @nic and pretend we just processed @nic.
+			 **/
+			
+			nic = (CamelIMAPCommand *) e_dlist_remhead (&engine->queue);
+			
+			nic->status = ic->status;
+			nic->result = ic->result;
+			resp_codes = nic->resp_codes;
+			nic->resp_codes = ic->resp_codes;
+			ic->resp_codes = resp_codes;
+			
+			camel_exception_xfer (&nic->ex, &ic->ex);
+			
+			camel_imap_command_unref (ic);
+			ic = nic;
+		}
+		
+		retval = ic->id;
+	}
+	
+	camel_imap_command_unref (ic);
+	
+	return retval;
+}
+
+
+/**
+ * camel_imap_engine_queue:
+ * @engine: IMAP engine
+ * @folder: IMAP folder that the command will affect (or %NULL if it doesn't matter)
+ * @format: command format
+ * @Varargs: arguments
+ *
+ * Basically the same as #camel_imap_command_new() except that this
+ * function also places the command in the engine queue.
+ *
+ * Returns the CamelIMAPCommand.
+ **/
+CamelIMAPCommand *
+camel_imap_engine_queue (CamelIMAPEngine *engine, CamelFolder *folder, const char *format, ...)
+{
+	CamelIMAPCommand *ic;
+	va_list args;
+	
+	va_start (args, format);
+	ic = camel_imap_command_newv (engine, (CamelIMAPFolder *) folder, format, args);
+	va_end (args);
+	
+	ic->id = engine->nextid++;
+	e_dlist_addtail (&engine->queue, (EDListNode *) ic);
+	camel_imap_command_ref (ic);
+	
+	return ic;
+}
+
+
+/**
+ * camel_imap_engine_prequeue:
+ * @engine: IMAP engine
+ * @ic: IMAP command to pre-queue
+ *
+ * Places @ic at the head of the queue of pending IMAP commands.
+ **/
+void
+camel_imap_engine_prequeue (CamelIMAPEngine *engine, CamelIMAPCommand *ic)
+{
+	g_return_if_fail (CAMEL_IS_IMAP_ENGINE (engine));
+	g_return_if_fail (ic != NULL);
+	
+	camel_imap_command_ref (ic);
+	
+	if (e_dlist_empty (&engine->queue)) {
+		e_dlist_addtail (&engine->queue, (EDListNode *) ic);
+		ic->id = engine->nextid++;
+	} else {
+		CamelIMAPCommand *nic;
+		EDListNode *node;
+		
+		node = (EDListNode *) ic;
+		e_dlist_addhead (&engine->queue, node);
+		nic = (CamelIMAPCommand *) node->next;
+		ic->id = nic->id - 1;
+		
+		if (ic->id == 0) {
+			/* increment all command ids */
+			node = engine->queue.head;
+			while (node->next) {
+				nic = (CamelIMAPCommand *) node;
+				node = node->next;
+				nic->id++;
+			}
+		}
+	}
+}
+
+
+void
+camel_imap_engine_dequeue (CamelIMAPEngine *engine, CamelIMAPCommand *ic)
+{
+	EDListNode *node = (EDListNode *) ic;
+	
+	if (node->next == NULL && node->prev == NULL)
+		return;
+	
+	e_dlist_remove (node);
+	node->next = NULL;
+	node->prev = NULL;
+	
+	camel_imap_command_unref (ic);
+}
+
+
+int
+camel_imap_engine_next_token (CamelIMAPEngine *engine, camel_imap_token_t *token, CamelException *ex)
+{
+	if (camel_imap_stream_next_token (engine->istream, token) == -1) {
+		camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+				      _("IMAP server %s unexpectedly disconnected: %s"),
+				      engine->url->host, errno ? g_strerror (errno) : _("Unknown"));
+		return -1;
+	}
+	
+	return 0;
+}
+
+
+int
+camel_imap_engine_eat_line (CamelIMAPEngine *engine, CamelException *ex)
+{
+	camel_imap_token_t token;
+	unsigned char *literal;
+	int retval;
+	size_t n;
+	
+	do {
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+		
+		if (token.token == CAMEL_IMAP_TOKEN_LITERAL) {
+			while ((retval = camel_imap_stream_literal (engine->istream, &literal, &n)) == 1)
+				;
+			
+			if (retval == -1) {
+				camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+						      _("IMAP server %s unexpectedly disconnected: %s"),
+						      engine->url->host, errno ? g_strerror (errno) : _("Unknown"));
+				
+				return -1;
+			}
+		}
+	} while (token.token != '\n');
+	
+	return 0;
+}
+
+
+int
+camel_imap_engine_line (CamelIMAPEngine *engine, unsigned char **line, size_t *len, CamelException *ex)
+{
+	GByteArray *linebuf;
+	unsigned char *buf;
+	size_t buflen;
+	int retval;
+	
+	if (line != NULL)
+		linebuf = g_byte_array_new ();
+	
+	while ((retval = camel_imap_stream_line (engine->istream, &buf, &buflen)) > 0) {
+		if (line != NULL)
+			g_byte_array_append (linebuf, buf, buflen);
+	}
+	
+	if (retval == -1) {
+		camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+				      _("IMAP server %s unexpectedly disconnected: %s"),
+				      engine->url->host, errno ? g_strerror (errno) : _("Unknown"));
+		
+		if (line != NULL)
+			g_byte_array_free (linebuf, TRUE);
+		
+		return -1;
+	}
+	
+	if (line != NULL) {
+		g_byte_array_append (linebuf, buf, buflen);
+		
+		*line = linebuf->data;
+		*len = linebuf->len;
+		
+		g_byte_array_free (linebuf, FALSE);
+	}
+	
+	return 0;
+}
+
+
+void
+camel_imap_resp_code_free (CamelIMAPRespCode *rcode)
+{
+	switch (rcode->code) {
+	case CAMEL_IMAP_RESP_CODE_PARSE:
+		g_free (rcode->v.parse);
+		break;
+	case CAMEL_IMAP_RESP_CODE_NEWNAME:
+		g_free (rcode->v.newname[0]);
+		g_free (rcode->v.newname[1]);
+		break;
+	case CAMEL_IMAP_RESP_CODE_COPYUID:
+		g_free (rcode->v.copyuid.srcset);
+		g_free (rcode->v.copyuid.destset);
+		break;
+	default:
+		break;
+	}
+	
+	g_free (rcode);
+}
diff --git a/camel/providers/imap4/camel-imap-engine.h b/camel/providers/imap4/camel-imap-engine.h
new file mode 100644
index 000000000..fd125b05d
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-engine.h
@@ -0,0 +1,221 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __CAMEL_IMAP_ENGINE_H__
+#define __CAMEL_IMAP_ENGINE_H__
+
+#include <stdarg.h>
+
+#include <glib.h>
+
+#include <e-util/e-msgport.h>
+
+#include <camel/camel-stream.h>
+#include <camel/camel-folder.h>
+#include <camel/camel-session.h>
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus */
+
+#define CAMEL_TYPE_IMAP_ENGINE            (camel_imap_engine_get_type ())
+#define CAMEL_IMAP_ENGINE(obj)            (CAMEL_CHECK_CAST ((obj), CAMEL_TYPE_IMAP_ENGINE, CamelIMAPEngine))
+#define CAMEL_IMAP_ENGINE_CLASS(klass)    (CAMEL_CHECK_CLASS_CAST ((klass), CAMEL_TYPE_IMAP_ENGINE, CamelIMAPEngineClass))
+#define CAMEL_IS_IMAP_ENGINE(obj)         (CAMEL_CHECK_TYPE ((obj), CAMEL_TYPE_IMAP_ENGINE))
+#define CAMEL_IS_IMAP_ENGINE_CLASS(klass) (CAMEL_CHECK_CLASS_TYPE ((klass), CAMEL_TYPE_IMAP_ENGINE))
+#define CAMEL_IMAP_ENGINE_GET_CLASS(obj)  (CAMEL_CHECK_GET_CLASS ((obj), CAMEL_TYPE_IMAP_ENGINE, CamelIMAPEngineClass))
+
+typedef struct _CamelIMAPEngine CamelIMAPEngine;
+typedef struct _CamelIMAPEngineClass CamelIMAPEngineClass;
+
+struct _camel_imap_token_t;
+struct _CamelIMAPCommand;
+struct _CamelIMAPFolder;
+struct _CamelIMAPStream;
+
+typedef enum {
+	CAMEL_IMAP_ENGINE_DISCONNECTED,
+	CAMEL_IMAP_ENGINE_CONNECTED,
+	CAMEL_IMAP_ENGINE_PREAUTH,
+	CAMEL_IMAP_ENGINE_AUTHENTICATED,
+	CAMEL_IMAP_ENGINE_SELECTED,
+} camel_imap_engine_t;
+
+typedef enum {
+	CAMEL_IMAP_LEVEL_UNKNOWN,
+	CAMEL_IMAP_LEVEL_IMAP4,
+	CAMEL_IMAP_LEVEL_IMAP4REV1
+} camel_imap_level_t;
+
+enum {
+	CAMEL_IMAP_CAPABILITY_IMAP4           = (1 << 0),
+	CAMEL_IMAP_CAPABILITY_IMAP4REV1       = (1 << 1),
+	CAMEL_IMAP_CAPABILITY_STATUS          = (1 << 2),
+	CAMEL_IMAP_CAPABILITY_NAMESPACE       = (1 << 3),
+	CAMEL_IMAP_CAPABILITY_UIDPLUS         = (1 << 4),
+	CAMEL_IMAP_CAPABILITY_LITERALPLUS     = (1 << 5),
+	CAMEL_IMAP_CAPABILITY_LOGINDISABLED   = (1 << 6),
+	CAMEL_IMAP_CAPABILITY_STARTTLS        = (1 << 7),
+	CAMEL_IMAP_CAPABILITY_useful_lsub     = (1 << 8),
+	CAMEL_IMAP_CAPABILITY_utf8_search     = (1 << 9),
+};
+
+typedef enum {
+	CAMEL_IMAP_RESP_CODE_ALERT,
+	CAMEL_IMAP_RESP_CODE_BADCHARSET,
+	CAMEL_IMAP_RESP_CODE_CAPABILITY,
+	CAMEL_IMAP_RESP_CODE_PARSE,
+	CAMEL_IMAP_RESP_CODE_PERM_FLAGS,
+	CAMEL_IMAP_RESP_CODE_READONLY,
+	CAMEL_IMAP_RESP_CODE_READWRITE,
+	CAMEL_IMAP_RESP_CODE_TRYCREATE,
+	CAMEL_IMAP_RESP_CODE_UIDNEXT,
+	CAMEL_IMAP_RESP_CODE_UIDVALIDITY,
+	CAMEL_IMAP_RESP_CODE_UNSEEN,
+	CAMEL_IMAP_RESP_CODE_NEWNAME,
+	CAMEL_IMAP_RESP_CODE_APPENDUID,
+	CAMEL_IMAP_RESP_CODE_COPYUID,
+	CAMEL_IMAP_RESP_CODE_UNKNOWN,
+} camel_imap_resp_code_t;
+
+typedef struct _CamelIMAPRespCode {
+	camel_imap_resp_code_t code;
+	union {
+		guint32 flags;
+		char *parse;
+		guint32 uidnext;
+		guint32 uidvalidity;
+		guint32 unseen;
+		char *newname[2];
+		struct {
+			guint32 uidvalidity;
+			guint32 uid;
+		} appenduid;
+		struct {
+			guint32 uidvalidity;
+			char *srcset;
+			char *destset;
+		} copyuid;
+	} v;
+} CamelIMAPRespCode;
+
+enum {
+	CAMEL_IMAP_UNTAGGED_ERROR = -1,
+	CAMEL_IMAP_UNTAGGED_OK,
+	CAMEL_IMAP_UNTAGGED_NO,
+	CAMEL_IMAP_UNTAGGED_BAD,
+	CAMEL_IMAP_UNTAGGED_PREAUTH,
+	CAMEL_IMAP_UNTAGGED_HANDLED,
+};
+
+typedef struct _CamelIMAPNamespace {
+	struct _CamelIMAPNamespace *next;
+	char *path;
+	char sep;
+} CamelIMAPNamespace;
+
+typedef struct _CamelIMAPNamespaceList {
+	CamelIMAPNamespace *personal;
+	CamelIMAPNamespace *other;
+	CamelIMAPNamespace *shared;
+} CamelIMAPNamespaceList;
+
+enum {
+	CAMEL_IMAP_ENGINE_MAXLEN_LINE,
+	CAMEL_IMAP_ENGINE_MAXLEN_TOKEN
+};
+
+struct _CamelIMAPEngine {
+	CamelObject parent_object;
+	
+	CamelSession *session;
+	CamelURL *url;
+	
+	camel_imap_engine_t state;
+	camel_imap_level_t level;
+	guint32 capa;
+	
+	guint32 maxlen:31;
+	guint32 maxlentype:1;
+	
+	CamelIMAPNamespaceList namespaces;
+	GHashTable *authtypes;                    /* supported authtypes */
+	
+	struct _CamelIMAPStream *istream;
+	CamelStream *ostream;
+	
+	unsigned char tagprefix;             /* 'A'..'Z' */
+	unsigned int tag;                    /* next command tag */
+	int nextid;
+	
+	struct _CamelIMAPFolder *folder;    /* currently selected folder */
+	
+	EDList queue;                          /* queue of waiting commands */
+	struct _CamelIMAPCommand *current;
+};
+
+struct _CamelIMAPEngineClass {
+	CamelObjectClass parent_class;
+	
+	unsigned char tagprefix;
+};
+
+
+CamelType camel_imap_engine_get_type (void);
+
+CamelIMAPEngine *camel_imap_engine_new (CamelSession *session, CamelURL *url);
+
+/* returns 0 on success or -1 on error */
+int camel_imap_engine_take_stream (CamelIMAPEngine *engine, CamelStream *stream, CamelException *ex);
+
+int camel_imap_engine_capability (CamelIMAPEngine *engine, CamelException *ex);
+int camel_imap_engine_namespace (CamelIMAPEngine *engine, CamelException *ex);
+
+int camel_imap_engine_select_folder (CamelIMAPEngine *engine, CamelFolder *folder, CamelException *ex);
+
+struct _CamelIMAPCommand *camel_imap_engine_queue (CamelIMAPEngine *engine, CamelFolder *folder,
+						   const char *format, ...);
+void camel_imap_engine_prequeue (CamelIMAPEngine *engine, struct _CamelIMAPCommand *ic);
+
+void camel_imap_engine_dequeue (CamelIMAPEngine *engine, struct _CamelIMAPCommand *ic);
+
+int camel_imap_engine_iterate (CamelIMAPEngine *engine);
+
+
+/* untagged response utility functions */
+int camel_imap_engine_handle_untagged_1 (CamelIMAPEngine *engine, struct _camel_imap_token_t *token, CamelException *ex);
+void camel_imap_engine_handle_untagged (CamelIMAPEngine *engine, CamelException *ex);
+
+/* stream wrapper utility functions */
+int camel_imap_engine_next_token (CamelIMAPEngine *engine, struct _camel_imap_token_t *token, CamelException *ex);
+int camel_imap_engine_line (CamelIMAPEngine *engine, unsigned char **line, size_t *len, CamelException *ex);
+int camel_imap_engine_eat_line (CamelIMAPEngine *engine, CamelException *ex);
+
+
+/* response code stuff */
+int camel_imap_engine_parse_resp_code (CamelIMAPEngine *engine, CamelException *ex);
+void camel_imap_resp_code_free (CamelIMAPRespCode *rcode);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __CAMEL_IMAP_ENGINE_H__ */
diff --git a/camel/providers/imap4/camel-imap-specials.c b/camel/providers/imap4/camel-imap-specials.c
new file mode 100644
index 000000000..5e61d1776
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-specials.c
@@ -0,0 +1,100 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+
+#include "camel-imap-specials.h"
+
+#define CHARS_ATOM_SPECIALS   "(){"
+#define CHARS_LWSP            " \t\r\n"
+#define CHARS_QUOTED_SPECIALS "\\\""
+#define CHARS_LIST_WILDCARDS  "*%"
+
+unsigned char camel_imap_specials[256] = {
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  6,  6,  2,  2,  6,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+         20,  0,  8,  0,  0, 32,  0,  0,  1,  1, 32,  0,  0,  0,  0,  0,
+          0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+          0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+          0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  8,  0,  0,  0,
+          0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+          0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  0,  0,  0,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+          2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+};
+
+
+static void
+imap_init_bits (unsigned short bit, unsigned short bitcopy, int remove, unsigned char *vals)
+{
+	int i, len = strlen (vals);
+	
+	if (!remove) {
+		for (i = 0; i < len; i++)
+			camel_imap_specials[vals[i]] |= bit;
+		if (bitcopy) {
+			for (i = 0; i < 256; i++) {
+				if (camel_imap_specials[i] & bitcopy)
+					camel_imap_specials[i] |= bit;
+			}
+		}
+	} else {
+		for (i = 0; i < 256; i++)
+			camel_imap_specials[i] |= bit;
+		for (i = 0; i < len; i++)
+			camel_imap_specials[vals[i]] &= ~bit;
+		if (bitcopy) {
+			for (i = 0; i < 256; i++) {
+				if (camel_imap_specials[i] & bitcopy)
+					camel_imap_specials[i] &= ~bit;
+			}
+		}
+	}
+}
+
+
+void
+camel_imap_specials_init (void)
+{
+	int i;
+	
+	for (i = 0; i < 256; i++) {
+		camel_imap_specials[i] = 0;
+		if (i <= 0x1f || i >= 0x7f)
+			camel_imap_specials[i] |= IS_CTRL;
+	}
+	
+	camel_imap_specials[' '] |= IS_SPACE;
+	
+	imap_init_bits (IS_LWSP, 0, 0, CHARS_LWSP);
+	imap_init_bits (IS_ASPECIAL, 0, 0, CHARS_ATOM_SPECIALS);
+	imap_init_bits (IS_QSPECIAL, 0, 0, CHARS_QUOTED_SPECIALS);
+	imap_init_bits (IS_WILDCARD, 0, 0, CHARS_LIST_WILDCARDS);
+}
diff --git a/camel/providers/imap4/camel-imap-specials.h b/camel/providers/imap4/camel-imap-specials.h
new file mode 100644
index 000000000..6bae4d3ae
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-specials.h
@@ -0,0 +1,53 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __CAMEL_IMAP_SPECIALS_H__
+#define __CAMEL_IMAP_SPECIALS_H__
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus */
+
+enum {
+	IS_ASPECIAL   = (1 << 0),
+	IS_CTRL       = (1 << 1),
+	IS_LWSP       = (1 << 2), 
+	IS_QSPECIAL   = (1 << 3),
+	IS_SPACE      = (1 << 4),
+	IS_WILDCARD   = (1 << 5),
+};
+
+extern unsigned char camel_imap_specials[256];
+
+#define is_atom(x) ((camel_imap_specials[(unsigned char)(x)] & (IS_ASPECIAL|IS_SPACE|IS_CTRL|IS_WILDCARD|IS_QSPECIAL)) == 0)
+#define is_ctrl(x) ((camel_imap_specials[(unsigned char)(x)] & IS_CTRL) != 0)
+#define is_lwsp(x) ((camel_imap_specials[(unsigned char)(x)] & IS_LWSP) != 0)
+#define is_type(x, t) ((camel_imap_specials[(unsigned char)(x)] & (t)) != 0)
+#define is_qsafe(x) ((camel_imap_specials[(unsigned char)(x)] & (IS_QSPECIAL|IS_CTRL)) == 0)
+#define is_wild(x)  ((camel_imap_specials[(unsigned char)(x)] & IS_WILDCARD) != 0)
+
+void camel_imap_specials_init (void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __CAMEL_IMAP_SPECIALS_H__ */
diff --git a/camel/providers/imap4/camel-imap-stream.c b/camel/providers/imap4/camel-imap-stream.c
new file mode 100644
index 000000000..4515a6d14
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-stream.c
@@ -0,0 +1,707 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "camel-imap-specials.h"
+
+#include "camel-imap-stream.h"
+
+#define d(x) x
+
+#define IMAP_TOKEN_LEN  128
+
+static void camel_imap_stream_class_init (CamelIMAPStreamClass *klass);
+static void camel_imap_stream_init (CamelIMAPStream *stream, CamelIMAPStreamClass *klass);
+static void camel_imap_stream_finalize (CamelObject *object);
+
+static ssize_t stream_read (CamelStream *stream, char *buffer, size_t n);
+static ssize_t stream_write (CamelStream *stream, const char *buffer, size_t n);
+static int stream_flush  (CamelStream *stream);
+static int stream_close  (CamelStream *stream);
+static gboolean stream_eos (CamelStream *stream);
+
+
+static CamelStreamClass *parent_class = NULL;
+
+
+CamelType
+camel_imap_stream_get_type (void)
+{
+	static CamelType type = 0;
+	
+	if (!type) {
+		type = camel_type_register (CAMEL_TYPE_IMAP_STREAM,
+					    "CamelIMAPStream",
+					    sizeof (CamelIMAPStream),
+					    sizeof (CamelIMAPStreamClass),
+					    (CamelObjectClassInitFunc) camel_imap_stream_class_init,
+					    NULL,
+					    (CamelObjectInitFunc) camel_imap_stream_init,
+					    (CamelObjectFinalizeFunc) camel_imap_stream_finalize);
+	}
+	
+	return type;
+}
+
+static void
+camel_imap_stream_class_init (CamelIMAPStreamClass *klass)
+{
+	CamelStreamClass *stream_class = (CamelStreamClass *) klass;
+	
+	parent_class = (CamelStreamClass *) camel_type_get_global_classfuncs (CAMEL_STREAM_TYPE);
+	
+	/* virtual method overload */
+	stream_class->read = stream_read;
+	stream_class->write = stream_write;
+	stream_class->flush = stream_flush;
+	stream_class->close = stream_close;
+	stream_class->eos = stream_eos;
+}
+
+static void
+camel_imap_stream_init (CamelIMAPStream *imap, CamelIMAPStreamClass *klass)
+{
+	imap->stream = NULL;
+	
+	imap->mode = CAMEL_IMAP_STREAM_MODE_TOKEN;
+	imap->disconnected = FALSE;
+	imap->eol = FALSE;
+	
+	imap->literal = 0;
+	
+	imap->inbuf = imap->realbuf + IMAP_READ_PRELEN;
+	imap->inptr = imap->inbuf;
+	imap->inend = imap->inbuf;
+	
+	imap->tokenbuf = g_malloc (IMAP_TOKEN_LEN);
+	imap->tokenptr = imap->tokenbuf;
+	imap->tokenleft = IMAP_TOKEN_LEN;
+	
+	imap->unget = NULL;
+}
+
+static void
+camel_imap_stream_finalize (CamelObject *object)
+{
+	CamelIMAPStream *imap = (CamelIMAPStream *) object;
+	
+	if (imap->stream)
+		camel_object_unref (imap->stream);
+	
+	g_free (imap->tokenbuf);
+	g_free (imap->unget);
+}
+
+
+static ssize_t
+imap_fill (CamelIMAPStream *imap)
+{
+	unsigned char *inbuf, *inptr, *inend;
+	ssize_t nread;
+	size_t inlen;
+	
+	if (imap->disconnected) {
+		errno = EINVAL;
+		return -1;
+	}
+	
+	inbuf = imap->inbuf;
+	inptr = imap->inptr;
+	inend = imap->inend;
+	inlen = inend - inptr;
+	
+	g_assert (inptr <= inend);
+	
+	/* attempt to align 'inend' with realbuf + SCAN_HEAD */
+	if (inptr >= inbuf) {
+		inbuf -= inlen < IMAP_READ_PRELEN ? inlen : IMAP_READ_PRELEN;
+		memmove (inbuf, inptr, inlen);
+		inptr = inbuf;
+		inbuf += inlen;
+	} else if (inptr > imap->realbuf) {
+		size_t shift;
+		
+		shift = MIN (inptr - imap->realbuf, inend - inbuf);
+		memmove (inptr - shift, inptr, inlen);
+		inptr -= shift;
+		inbuf = inptr + inlen;
+	} else {
+		/* we can't shift... */
+		inbuf = inend;
+	}
+	
+	imap->inptr = inptr;
+	imap->inend = inbuf;
+	inend = imap->realbuf + IMAP_READ_PRELEN + IMAP_READ_BUFLEN - 1;
+	
+	if ((nread = camel_stream_read (imap->stream, inbuf, inend - inbuf)) == -1)
+		return -1;
+	else if (nread == 0)
+		imap->disconnected = TRUE;
+	
+	imap->inend += nread;
+	
+	return imap->inend - imap->inptr;
+}
+
+static ssize_t
+stream_read (CamelStream *stream, char *buffer, size_t n)
+{
+	CamelIMAPStream *imap = (CamelIMAPStream *) stream;
+	ssize_t len, nread = 0;
+	
+	if (imap->mode == CAMEL_IMAP_STREAM_MODE_LITERAL) {
+		/* don't let our caller read past the end of the literal */
+		n = MIN (n, imap->literal);
+	}
+	
+	if (imap->inptr < imap->inend) {
+		len = MIN (n, imap->inend - imap->inptr);
+		memcpy (buffer, imap->inptr, len);
+		imap->inptr += len;
+		nread = len;
+	}
+	
+	if (nread < n) {
+		if ((len = camel_stream_read (imap->stream, buffer + nread, n - nread)) == 0)
+			imap->disconnected = TRUE;
+		else if (len == -1)
+			return -1;
+		
+		nread += len;
+	}
+	
+	if (imap->mode == CAMEL_IMAP_STREAM_MODE_LITERAL) {
+		imap->literal -= nread;
+		
+		if (imap->literal == 0) {
+			imap->mode = CAMEL_IMAP_STREAM_MODE_TOKEN;
+			imap->eol = TRUE;
+		}
+	}
+	
+	return nread;
+}
+
+static ssize_t
+stream_write (CamelStream *stream, const char *buffer, size_t n)
+{
+	CamelIMAPStream *imap = (CamelIMAPStream *) stream;
+	ssize_t nwritten;
+	
+	if (imap->disconnected) {
+		errno = EINVAL;
+		return -1;
+	}
+	
+	if ((nwritten = camel_stream_write (imap->stream, buffer, n)) == 0)
+		imap->disconnected = TRUE;
+	
+	return nwritten;
+}
+
+static int
+stream_flush (CamelStream *stream)
+{
+	CamelIMAPStream *imap = (CamelIMAPStream *) stream;
+	
+	return camel_stream_flush (imap->stream);
+}
+
+static int
+stream_close (CamelStream *stream)
+{
+	CamelIMAPStream *imap = (CamelIMAPStream *) stream;
+	
+	if (camel_stream_close (imap->stream) == -1)
+		return -1;
+	
+	camel_object_unref (imap->stream);
+	imap->stream = NULL;
+	
+	imap->disconnected = TRUE;
+	
+	return 0;
+}
+
+static gboolean
+stream_eos (CamelStream *stream)
+{
+	CamelIMAPStream *imap = (CamelIMAPStream *) stream;
+	
+	if (imap->eol)
+		return TRUE;
+	
+	if (imap->disconnected && imap->inptr == imap->inend)
+		return TRUE;
+	
+	if (camel_stream_eos (imap->stream))
+		return TRUE;
+	
+	return FALSE;
+}
+
+
+/**
+ * camel_imap_stream_new:
+ * @stream: tcp stream
+ *
+ * Returns a new imap stream
+ **/
+CamelStream *
+camel_imap_stream_new (CamelStream *stream)
+{
+	CamelIMAPStream *imap;
+	
+	g_return_val_if_fail (CAMEL_IS_STREAM (stream), NULL);
+	
+	imap = (CamelIMAPStream *) camel_object_new (CAMEL_TYPE_IMAP_STREAM);
+	camel_object_ref (stream);
+	imap->stream = stream;
+	
+	return (CamelStream *) imap;
+}
+
+
+
+#define token_save(imap, start, len) G_STMT_START {                         \
+	if (imap->tokenleft <= len) {                                       \
+		unsigned int tlen, toff;                                    \
+		                                                            \
+		tlen = toff = imap->tokenptr - imap->tokenbuf;              \
+		tlen = tlen ? tlen : 1;                                     \
+		                                                            \
+		while (tlen < toff + len)                                   \
+			tlen <<= 1;                                         \
+		                                                            \
+		imap->tokenbuf = g_realloc (imap->tokenbuf, tlen + 1);      \
+		imap->tokenptr = imap->tokenbuf + toff;                     \
+		imap->tokenleft = tlen - toff;                              \
+	}                                                                   \
+	                                                                    \
+	memcpy (imap->tokenptr, start, len);                                \
+	imap->tokenptr += len;                                              \
+	imap->tokenleft -= len;                                             \
+} G_STMT_END
+
+#define token_clear(imap) G_STMT_START {                                    \
+	imap->tokenleft += imap->tokenptr - imap->tokenbuf;                 \
+	imap->tokenptr = imap->tokenbuf;                                    \
+	imap->literal = 0;                                                  \
+} G_STMT_END
+
+
+/**
+ * camel_imap_stream_next_token:
+ * @stream: imap stream
+ * @token: imap token
+ *
+ * Reads the next token from the imap stream and saves it in @token.
+ *
+ * Returns 0 on success or -1 on fail.
+ **/
+int
+camel_imap_stream_next_token (CamelIMAPStream *stream, camel_imap_token_t *token)
+{
+	register unsigned char *inptr;
+	unsigned char *inend, *start, *p;
+	gboolean escaped = FALSE;
+	size_t literal = 0;
+	guint32 nz_number;
+	int ret;
+	
+	g_return_val_if_fail (CAMEL_IS_IMAP_STREAM (stream), -1);
+	g_return_val_if_fail (stream->mode != CAMEL_IMAP_STREAM_MODE_LITERAL, -1);
+	g_return_val_if_fail (token != NULL, -1);
+	
+	if (stream->unget) {
+		memcpy (token, stream->unget, sizeof (camel_imap_token_t));
+		g_free (stream->unget);
+		stream->unget = NULL;
+		return 0;
+	}
+	
+	token_clear (stream);
+	
+	inptr = stream->inptr;
+	inend = stream->inend;
+	*inend = '\0';
+	
+	do {
+		if (inptr == inend) {
+			if ((ret = imap_fill (stream)) < 0) {
+				token->token = CAMEL_IMAP_TOKEN_ERROR;
+				return -1;
+			} else if (ret == 0) {
+				token->token = CAMEL_IMAP_TOKEN_NO_DATA;
+				return 0;
+			}
+			
+			inptr = stream->inptr;
+			inend = stream->inend;
+			*inend = '\0';
+		}
+		
+		while (*inptr == ' ' || *inptr == '\r')
+			inptr++;
+	} while (inptr == inend);
+	
+	do {
+		if (inptr < inend) {
+			if (*inptr == '"') {
+				/* qstring token */
+				escaped = FALSE;
+				start = inptr;
+				
+				/* eat the beginning " */
+				inptr++;
+				
+				p = inptr;
+				while (inptr < inend) {
+					if (*inptr == '"' && !escaped)
+						break;
+					
+					if (*inptr == '\\' && !escaped) {
+						token_save (stream, p, inptr - p);
+						escaped = TRUE;
+						inptr++;
+						p = inptr;
+					} else {
+						inptr++;
+						escaped = FALSE;
+					}
+				}
+				
+				token_save (stream, p, inptr - p);
+				
+				if (inptr == inend) {
+					stream->inptr = start;
+					goto refill;
+				}
+				
+				/* eat the ending " */
+				inptr++;
+				
+				/* nul-terminate the atom token */
+				token_save (stream, "", 1);
+				
+				token->token = CAMEL_IMAP_TOKEN_QSTRING;
+				token->v.qstring = stream->tokenbuf;
+				
+				d(fprintf (stderr, "token: \"%s\"\n", token->v.qstring));
+				
+				break;
+			} else if (strchr ("+*()[]\n", *inptr)) {
+				/* special character token */
+				token->token = *inptr++;
+#if d(!)0
+				if (token->token != '\n')
+					fprintf (stderr, "token: %c\n", token->token);
+				else
+					fprintf (stderr, "token: \\n\n");
+#endif
+				break;
+			} else if (*inptr == '{') {
+				/* literal identifier token */
+				if ((p = strchr (inptr, '}')) && strchr (p, '\n')) {
+					inptr++;
+					
+					while (isdigit ((int) *inptr) && literal < UINT_MAX / 10)
+						literal = (literal * 10) + (*inptr++ - '0');
+					
+					if (*inptr != '}') {
+						if (isdigit ((int) *inptr))
+							g_warning ("illegal literal identifier: literal too large");
+						else if (*inptr != '+')
+							g_warning ("illegal literal identifier: garbage following size");
+						
+						while (*inptr != '}')
+							inptr++;
+					}
+					
+					/* skip over '}' */
+					inptr++;
+					
+					/* skip over any trailing whitespace */
+					while (*inptr == ' ' || *inptr == '\r')
+						inptr++;
+					
+					if (*inptr != '\n') {
+						g_warning ("illegal token following literal identifier: %s", inptr);
+						
+						/* skip ahead to the eoln */
+						inptr = strchr (inptr, '\n');
+					}
+					
+					/* skip over '\n' */
+					inptr++;
+					
+					token->token = CAMEL_IMAP_TOKEN_LITERAL;
+					token->v.literal = literal;
+					
+					d(fprintf (stderr, "token: {%u}\n", literal));
+					
+					stream->mode = CAMEL_IMAP_STREAM_MODE_LITERAL;
+					stream->literal = literal;
+					stream->eol = FALSE;
+					
+					break;
+				} else {
+					stream->inptr = inptr;
+					goto refill;
+				}
+			} else if (*inptr >= '0' && *inptr <= '9') {
+				/* number token */
+				*inend = '\0';
+				nz_number = strtoul ((char *) inptr, (char **) &start, 10);
+				if (start == inend)
+					goto refill;
+				
+				if (*start == ':' || *start == ',') {
+					/* workaround for 'set' tokens (APPENDUID / COPYUID) */
+					goto atom_token;
+				}
+				
+				inptr = start;
+				token->token = CAMEL_IMAP_TOKEN_NUMBER;
+				token->v.number = nz_number;
+				
+				d(fprintf (stderr, "token: %u\n", nz_number));
+				
+				break;
+			} else if (is_atom (*inptr)) {
+			atom_token:
+				/* simple atom token */
+				start = inptr;
+				
+				while (inptr < inend && is_atom (*inptr))
+					inptr++;
+				
+				if (inptr == inend) {
+					stream->inptr = start;
+					goto refill;
+				}
+				
+				token_save (stream, start, inptr - start);
+				
+				/* nul-terminate the atom token */
+				token_save (stream, "", 1);
+				
+				if (!strcmp (stream->tokenbuf, "NIL")) {
+					/* special atom token */
+					token->token = CAMEL_IMAP_TOKEN_NIL;
+					d(fprintf (stderr, "token: NIL\n"));
+				} else {
+					token->token = CAMEL_IMAP_TOKEN_ATOM;
+					token->v.atom = stream->tokenbuf;
+					d(fprintf (stderr, "token: %s\n", token->v.atom));
+				}
+				
+				break;
+			} else if (*inptr == '\\') {
+				/* possible flag token ("\" atom) */
+				start = inptr++;
+				
+				while (inptr < inend && is_atom (*inptr))
+					inptr++;
+				
+				if (inptr == inend) {
+					stream->inptr = start;
+					goto refill;
+				}
+				
+				if ((inptr - start) > 1) {
+					token_save (stream, start, inptr - start);
+					
+					/* nul-terminate the flag token */
+					token_save (stream, "", 1);
+					
+					token->token = CAMEL_IMAP_TOKEN_FLAG;
+					token->v.atom = stream->tokenbuf;
+					d(fprintf (stderr, "token: %s\n", token->v.atom));
+				} else {
+					token->token = '\\';
+					d(fprintf (stderr, "token: %c\n", token->token));
+				}
+				break;
+			} else if (is_lwsp (*inptr)) {
+				inptr++;
+			} else {
+				/* unknown character token? */
+				token->token = *inptr++;
+				d(fprintf (stderr, "token: %c\n", token->token));
+				break;
+			}
+		} else {
+		refill:
+			token_clear (stream);
+			
+			if (imap_fill (stream) <= 0) {
+				token->token = CAMEL_IMAP_TOKEN_ERROR;
+				return -1;
+			}
+			
+			inptr = stream->inptr;
+			inend = stream->inend;
+			*inend = '\0';
+		}
+	} while (inptr < inend);
+	
+	stream->inptr = inptr;
+	
+	return 0;
+}
+
+
+/**
+ * camel_imap_stream_unget_token:
+ * @stream: imap stream
+ * @token: token to 'unget'
+ *
+ * Ungets an imap token (as in ungetc()).
+ *
+ * Note: you may *ONLY* unget a single token. Trying to unget another
+ * token will fail.
+ *
+ * Returns 0 on success or -1 on fail.
+ **/
+int
+camel_imap_stream_unget_token (CamelIMAPStream *stream, camel_imap_token_t *token)
+{
+	camel_imap_token_t *unget;
+	
+	if (stream->unget)
+		return -1;
+	
+	if (token->token != CAMEL_IMAP_TOKEN_NO_DATA) {
+		stream->unget = unget = g_new (camel_imap_token_t, 1);
+		memcpy (unget, token, sizeof (camel_imap_token_t));
+	}
+	
+	return 0;
+}
+
+
+/**
+ * camel_imap_stream_readline:
+ * @stream: imap stream
+ * @line: line pointer
+ * @len: line length
+ *
+ * Reads a single line from the imap stream and points @line at an
+ * internal buffer containing the line read and sets @len to the
+ * length of the line buffer.
+ *
+ * Returns -1 on error, 0 if the line read is complete, or 1 if the
+ * read is incomplete.
+ **/
+int
+camel_imap_stream_line (CamelIMAPStream *stream, unsigned char **line, size_t *len)
+{
+	register unsigned char *inptr;
+	unsigned char *inend;
+	
+	g_return_val_if_fail (CAMEL_IS_IMAP_STREAM (stream), -1);
+	g_return_val_if_fail (stream->mode != CAMEL_IMAP_STREAM_MODE_LITERAL, -1);
+	g_return_val_if_fail (line != NULL, -1);
+	g_return_val_if_fail (len != NULL, -1);
+	
+	if ((stream->inend - stream->inptr) < 3) {
+		/* keep our buffer full to the optimal size */
+		if (imap_fill (stream) == -1 && stream->inptr == stream->inend)
+			return -1;
+	}
+	
+	*line = stream->inptr;
+	inptr = stream->inptr;
+	inend = stream->inend;
+	*inend = '\n';
+	
+	while (*inptr != '\n')
+		inptr++;
+	
+	*len = (inptr - stream->inptr);
+	if (inptr < inend) {
+		/* got the eoln */
+		if (inptr > stream->inptr && inptr[-1] == '\r')
+			inptr[-1] = '\0';
+		else
+			inptr[0] = '\0';
+		
+		stream->inptr = inptr + 1;
+		*len += 1;
+		
+		return 0;
+	}
+	
+	stream->inptr = inptr;
+	
+	return 1;
+}
+
+
+int
+camel_imap_stream_literal (CamelIMAPStream *stream, unsigned char **literal, size_t *len)
+{
+	unsigned char *inptr, *inend;
+	size_t nread;
+	
+	g_return_val_if_fail (CAMEL_IS_IMAP_STREAM (stream), -1);
+	g_return_val_if_fail (stream->mode == CAMEL_IMAP_STREAM_MODE_LITERAL, -1);
+	g_return_val_if_fail (literal != NULL, -1);
+	g_return_val_if_fail (len != NULL, -1);
+	
+	if (stream->eol) {
+		*len = 0;
+		return 0;
+	}
+	
+	if ((stream->inend - stream->inptr) < 1) {
+		/* keep our buffer full to the optimal size */
+		if (imap_fill (stream) == -1 && stream->inptr == stream->inend)
+			return -1;
+	}
+	
+	*literal = inptr = stream->inptr;
+	inend = stream->inend;
+	if ((inend - inptr) > stream->literal)
+		inend = inptr + stream->literal;
+	else
+		inend = stream->inend;
+	
+	*len = nread = inend - inptr;
+	
+	stream->literal -= nread;
+	if (stream->literal == 0) {
+		stream->mode = CAMEL_IMAP_STREAM_MODE_TOKEN;
+		stream->eol = TRUE;
+		return 0;
+	}
+	
+	return 1;
+}
diff --git a/camel/providers/imap4/camel-imap-stream.h b/camel/providers/imap4/camel-imap-stream.h
new file mode 100644
index 000000000..872cbf714
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-stream.h
@@ -0,0 +1,124 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __CAMEL_IMAP_STREAM_H__
+#define __CAMEL_IMAP_STREAM_H__
+
+#include <camel/camel-stream.h>
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus */
+
+#define CAMEL_TYPE_IMAP_STREAM     (camel_imap_stream_get_type ())
+#define CAMEL_IMAP_STREAM(obj)     (CAMEL_CHECK_CAST ((obj), CAMEL_TYPE_IMAP_STREAM, CamelIMAPStream))
+#define CAMEL_IMAP_STREAM_CLASS(k) (CAMEL_CHECK_CLASS_CAST ((k), CAMEL_TYPE_IMAP_STREAM, CamelIMAPStreamClass))
+#define CAMEL_IS_IMAP_STREAM(o)    (CAMEL_CHECK_TYPE((o), CAMEL_TYPE_IMAP_STREAM))
+
+typedef struct _CamelIMAPStream CamelIMAPStream;
+typedef struct _CamelIMAPStreamClass CamelIMAPStreamClass;
+
+#define IMAP_READ_PRELEN   128
+#define IMAP_READ_BUFLEN   4096
+
+enum {
+	CAMEL_IMAP_TOKEN_NO_DATA       = -8,
+	CAMEL_IMAP_TOKEN_ERROR         = -7,
+	CAMEL_IMAP_TOKEN_NIL           = -6,
+	CAMEL_IMAP_TOKEN_ATOM          = -5,
+	CAMEL_IMAP_TOKEN_FLAG          = -4,
+	CAMEL_IMAP_TOKEN_NUMBER        = -3,
+	CAMEL_IMAP_TOKEN_QSTRING       = -2,
+	CAMEL_IMAP_TOKEN_LITERAL       = -1,
+	/* CAMEL_IMAP_TOKEN_CHAR would just be the char we got */
+	CAMEL_IMAP_TOKEN_EOLN          = '\n',
+	CAMEL_IMAP_TOKEN_LPAREN        = '(',
+	CAMEL_IMAP_TOKEN_RPAREN        = ')',
+	CAMEL_IMAP_TOKEN_ASTERISK      = '*',
+	CAMEL_IMAP_TOKEN_PLUS          = '+',
+	CAMEL_IMAP_TOKEN_LBRACKET      = '[',
+	CAMEL_IMAP_TOKEN_RBRACKET      = ']',
+};
+
+typedef struct _camel_imap_token_t {
+	int token;
+	union {
+		char *atom;
+		char *flag;
+		char *qstring;
+		size_t literal;
+		guint32 number;
+	} v;
+} camel_imap_token_t;
+
+enum {
+	CAMEL_IMAP_STREAM_MODE_TOKEN   = 0,
+	CAMEL_IMAP_STREAM_MODE_LITERAL = 1,
+};
+
+struct _CamelIMAPStream {
+	CamelStream parent_object;
+	
+	CamelStream *stream;
+	
+	guint disconnected:1;  /* disconnected state */
+	guint mode:1;          /* TOKEN vs LITERAL */
+	guint eol:1;           /* end-of-literal */
+	
+	size_t literal;
+	
+	/* i/o buffers */
+	unsigned char realbuf[IMAP_READ_PRELEN + IMAP_READ_BUFLEN + 1];
+	unsigned char *inbuf;
+	unsigned char *inptr;
+	unsigned char *inend;
+	
+	/* token buffers */
+	unsigned char *tokenbuf;
+	unsigned char *tokenptr;
+	unsigned int tokenleft;
+	
+	camel_imap_token_t *unget;
+};
+
+struct _CamelIMAPStreamClass {
+	CamelStreamClass parent_class;
+	
+	/* Virtual methods */
+};
+
+
+/* Standard Camel function */
+CamelType camel_imap_stream_get_type (void);
+
+CamelStream *camel_imap_stream_new (CamelStream *stream);
+
+int camel_imap_stream_next_token (CamelIMAPStream *stream, camel_imap_token_t *token);
+int camel_imap_stream_unget_token (CamelIMAPStream *stream, camel_imap_token_t *token);
+
+int camel_imap_stream_line (CamelIMAPStream *stream, unsigned char **line, size_t *len);
+int camel_imap_stream_literal (CamelIMAPStream *stream, unsigned char **literal, size_t *len);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __CAMEL_IMAP_STREAM_H__ */
diff --git a/camel/providers/imap4/camel-imap-utils.c b/camel/providers/imap4/camel-imap-utils.c
new file mode 100644
index 000000000..129c7b83a
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-utils.c
@@ -0,0 +1,313 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "camel-imap-engine.h"
+#include "camel-imap-stream.h"
+#include "camel-imap-command.h"
+
+#include "camel-imap-utils.h"
+
+#define d(x) x
+
+
+void
+camel_imap_flags_diff (flags_diff_t *diff, guint32 old, guint32 new)
+{
+	diff->changed = old ^ new;
+	diff->bits = new & diff->changed;
+}
+
+
+guint32
+camel_imap_flags_merge (flags_diff_t *diff, guint32 flags)
+{
+	return (flags & ~diff->changed) | diff->bits;
+}
+
+
+/**
+ * camel_imap_merge_flags:
+ * @original: original server flags
+ * @local: local flags (after changes)
+ * @server: new server flags (another client updated the server flags)
+ *
+ * Merge the local flag changes into the new server flags.
+ *
+ * Returns the merged flags.
+ **/
+guint32
+camel_imap_merge_flags (guint32 original, guint32 local, guint32 server)
+{
+	flags_diff_t diff;
+	
+	camel_imap_flags_diff (&diff, original, local);
+	
+	return camel_imap_flags_merge (&diff, server);
+}
+
+
+void
+camel_imap_utils_set_unexpected_token_error (CamelException *ex, CamelIMAPEngine *engine, camel_imap_token_t *token)
+{
+	GString *errmsg;
+	
+	if (ex == NULL)
+		return;
+	
+	errmsg = g_string_new ("");
+	g_string_append_printf (errmsg, _("Unexpected token in response from IMAP server %s: "),
+				engine->url->host);
+	
+	switch (token->token) {
+	case CAMEL_IMAP_TOKEN_NIL:
+		g_string_append (errmsg, "NIL");
+		break;
+	case CAMEL_IMAP_TOKEN_ATOM:
+		g_string_append (errmsg, token->v.atom);
+		break;
+	case CAMEL_IMAP_TOKEN_FLAG:
+		g_string_append (errmsg, token->v.flag);
+		break;
+	case CAMEL_IMAP_TOKEN_QSTRING:
+		g_string_append (errmsg, token->v.qstring);
+		break;
+	case CAMEL_IMAP_TOKEN_LITERAL:
+		g_string_append_printf (errmsg, "{%u}", token->v.literal);
+		break;
+	case CAMEL_IMAP_TOKEN_NUMBER:
+		g_string_append_printf (errmsg, "%u", token->v.number);
+		break;
+	case CAMEL_IMAP_TOKEN_NO_DATA:
+		g_string_append (errmsg, _("No data"));
+		break;
+	default:
+		g_string_append_c (errmsg, (unsigned char) (token->token & 0xff));
+		break;
+	}
+	
+	camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, errmsg->str);
+	
+	g_string_free (errmsg, TRUE);
+}
+
+
+static struct {
+	const char *name;
+	guint32 flag;
+} imap_flags[] = {
+	{ "\\Answered", CAMEL_MESSAGE_ANSWERED    },
+	{ "\\Deleted",  CAMEL_MESSAGE_DELETED     },
+	{ "\\Draft",    CAMEL_MESSAGE_DRAFT       },
+	{ "\\Flagged",  CAMEL_MESSAGE_FLAGGED     },
+	{ "\\Seen",     CAMEL_MESSAGE_SEEN        },
+	/*{ "\\Recent",   CAMEL_MESSAGE_RECENT      },*/
+	{ "\\*",        CAMEL_MESSAGE_USER        },
+};
+
+#if 0
+static struct {
+	const char *name;
+	guint32 flag;
+} imap_user_flags[] = {
+	{ "Forwarded",  CAMEL_MESSAGE_FORWARDED   },
+};
+#endif
+
+
+int
+camel_imap_parse_flags_list (CamelIMAPEngine *engine, guint32 *flags, CamelException *ex)
+{
+	camel_imap_token_t token;
+	guint32 new = 0;
+	int i;
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	if (token.token != '(') {
+		d(fprintf (stderr, "Expected to find a '(' token starting the flags list\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+		return -1;
+	
+	while (token.token == CAMEL_IMAP_TOKEN_ATOM || token.token == CAMEL_IMAP_TOKEN_FLAG) {
+		/* parse the flags list */
+		for (i = 0; i < G_N_ELEMENTS (imap_flags); i++) {
+			if (!strcasecmp (imap_flags[i].name, token.v.atom)) {
+				new |= imap_flags[i].flag;
+				break;
+			}
+		}
+		
+#if 0
+		if (i == G_N_ELEMENTS (imap_flags)) {
+			for (i = 0; i < G_N_ELEMENTS (imap_user_flags); i++) {
+				if (!strcasecmp (imap_user_flags[i].name, token.v.atom)) {
+					new |= imap_user_flags[i].flag;
+					break;
+				}
+			}
+			
+			if (i == G_N_ELEMENTS (imap_user_flags))
+				fprintf (stderr, "Encountered unknown flag: %s\n", token.v.atom);
+		}
+#else
+		if (i == G_N_ELEMENTS (imap_flags))
+			fprintf (stderr, "Encountered unknown flag: %s\n", token.v.atom);
+#endif
+		
+		if (camel_imap_engine_next_token (engine, &token, ex) == -1)
+			return -1;
+	}
+	
+	if (token.token != ')') {
+		d(fprintf (stderr, "Expected to find a ')' token terminating the flags list\n"));
+		camel_imap_utils_set_unexpected_token_error (ex, engine, &token);
+		return -1;
+	}
+	
+	*flags = new;
+	
+	return 0;
+}
+
+
+struct {
+	const char *name;
+	guint32 flag;
+} list_flags[] = {
+	{ "\\Marked",        CAMEL_IMAP_FOLDER_MARKED          },
+	{ "\\Unmarked",      CAMEL_IMAP_FOLDER_UNMARKED        },
+	{ "\\Noselect",      CAMEL_IMAP_FOLDER_NOSELECT        },
+	{ "\\Noinferiors",   CAMEL_IMAP_FOLDER_NOINFERIORS     },
+	{ "\\HasChildren",   CAMEL_IMAP_FOLDER_HAS_CHILDREN    },
+	{ "\\HasNoChildren", CAMEL_IMAP_FOLDER_HAS_NO_CHILDREN },
+};
+
+int
+camel_imap_untagged_list (CamelIMAPEngine *engine, CamelIMAPCommand *ic, guint32 index, camel_imap_token_t *token, CamelException *ex)
+{
+	GPtrArray *array = ic->user_data;
+	camel_imap_list_t *list;
+	unsigned char *buf;
+	guint32 flags = 0;
+	GString *literal;
+	char delim;
+	size_t n;
+	int i;
+	
+	if (camel_imap_engine_next_token (engine, token, ex) == -1)
+		return -1;
+	
+	/* parse the flag list */
+	if (token->token != '(')
+		goto unexpected;
+	
+	if (camel_imap_engine_next_token (engine, token, ex) == -1)
+		return -1;
+	
+	while (token->token == CAMEL_IMAP_TOKEN_FLAG || token->token == CAMEL_IMAP_TOKEN_ATOM) {
+		for (i = 0; i < G_N_ELEMENTS (list_flags); i++) {
+			if (!g_ascii_strcasecmp (list_flags[i].name, token->v.atom)) {
+				flags |= list_flags[i].flag;
+				break;
+			}
+		}
+		
+		if (camel_imap_engine_next_token (engine, token, ex) == -1)
+			return -1;
+	}
+	
+	if (token->token != ')')
+		goto unexpected;
+	
+	/* parse the path delimiter */
+	if (camel_imap_engine_next_token (engine, token, ex) == -1)
+		return -1;
+	
+	switch (token->token) {
+	case CAMEL_IMAP_TOKEN_NIL:
+		delim = '\0';
+		break;
+	case CAMEL_IMAP_TOKEN_QSTRING:
+		delim = *token->v.qstring;
+		break;
+	default:
+		goto unexpected;
+	}
+	
+	/* parse the folder name */
+	if (camel_imap_engine_next_token (engine, token, ex) == -1)
+		return -1;
+	
+	list = g_new (camel_imap_list_t, 1);
+	list->flags = flags;
+	list->delim = delim;
+	
+	switch (token->token) {
+	case CAMEL_IMAP_TOKEN_ATOM:
+		list->name = g_strdup (token->v.atom);
+		break;
+	case CAMEL_IMAP_TOKEN_QSTRING:
+		list->name = g_strdup (token->v.qstring);
+		break;
+	case CAMEL_IMAP_TOKEN_LITERAL:
+		literal = g_string_new ("");
+		while ((i = camel_imap_stream_literal (engine->istream, &buf, &n)) == 1)
+			g_string_append_len (literal, buf, n);
+		
+		if (i == -1) {
+			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+					      _("IMAP server %s unexpectedly disconnected: %s"),
+					      engine->url->host, errno ? g_strerror (errno) : _("Unknown"));
+			g_string_free (literal, TRUE);
+			return -1;
+		}
+		
+		g_string_append_len (literal, buf, n);
+		list->name = literal->str;
+		g_string_free (literal, FALSE);
+		break;
+	default:
+		g_free (list);
+		goto unexpected;
+	}
+	
+	g_ptr_array_add (array, list);
+	
+	return camel_imap_engine_eat_line (engine, ex);
+	
+ unexpected:
+	
+	camel_imap_utils_set_unexpected_token_error (ex, engine, token);
+	
+	return -1;
+}
diff --git a/camel/providers/imap4/camel-imap-utils.h b/camel/providers/imap4/camel-imap-utils.h
new file mode 100644
index 000000000..c2f87ae4e
--- /dev/null
+++ b/camel/providers/imap4/camel-imap-utils.h
@@ -0,0 +1,72 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*  Camel
+ *  Copyright (C) 1999-2004 Jeffrey Stedfast
+ *
+ *  This program is free 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __CAMEL_IMAP_UTILS_H__
+#define __CAMEL_IMAP_UTILS_H__
+
+#include <glib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus */
+
+/* IMAP flag merging */
+typedef struct {
+	guint32 changed;
+	guint32 bits;
+} flags_diff_t;
+
+void camel_imap_flags_diff (flags_diff_t *diff, guint32 old, guint32 new);
+guint32 camel_imap_flags_merge (flags_diff_t *diff, guint32 flags);
+guint32 camel_imap_merge_flags (guint32 original, guint32 local, guint32 server);
+
+
+struct _CamelIMAPEngine;
+struct _CamelIMAPCommand;
+struct _camel_imap_token_t;
+
+void camel_imap_utils_set_unexpected_token_error (CamelException *ex, struct _CamelIMAPEngine *engine, struct _camel_imap_token_t *token);
+
+int camel_imap_parse_flags_list (struct _CamelIMAPEngine *engine, guint32 *flags, CamelException *ex);
+
+enum {
+	CAMEL_IMAP_FOLDER_MARKED          = (1 << 0),
+	CAMEL_IMAP_FOLDER_UNMARKED        = (1 << 1),
+	CAMEL_IMAP_FOLDER_NOSELECT        = (1 << 2),
+	CAMEL_IMAP_FOLDER_NOINFERIORS     = (1 << 3),
+	CAMEL_IMAP_FOLDER_HAS_CHILDREN    = (1 << 4),
+	CAMEL_IMAP_FOLDER_HAS_NO_CHILDREN = (1 << 5),
+};
+
+typedef struct {
+	guint32 flags;
+	char delim;
+	char *name;
+} camel_imap_list_t;
+
+int camel_imap_untagged_list (struct _CamelIMAPEngine *engine, struct _CamelIMAPCommand *ic,
+			       guint32 index, struct _camel_imap_token_t *token, CamelException *ex);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __CAMEL_IMAP_UTILS_H__ */
diff --git a/camel/providers/imap4/libcamelimap4.urls b/camel/providers/imap4/libcamelimap4.urls
new file mode 100644
index 000000000..7ccb0b041
--- /dev/null
+++ b/camel/providers/imap4/libcamelimap4.urls
@@ -0,0 +1 @@
+imap4