Initial revision

1 files changed, 1130 insertions, 0 deletions

diff --git a/kmicromail/libetpan/generic/imapdriver.c b/kmicromail/libetpan/generic/imapdriver.c
new file mode 100644
index 0000000..0d63319
--- a/dev/null
+++ b/kmicromail/libetpan/generic/imapdriver.c
@@ -0,0 +1,1130 @@
+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2002 - DINH Viet Hoa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the libEtPan! project nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * $Id$
+ */
+
+#include "imapdriver.h"
+
+#include "mail.h"
+#include "imapdriver_tools.h"
+#include "mailmessage.h"
+#include "imapdriver_message.h"
+#include "imapdriver_types.h"
+#include "maildriver.h"
+#include "maildriver_tools.h"
+#include "generic_cache.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+static int imapdriver_initialize(mailsession * session);
+
+static void imapdriver_uninitialize(mailsession * session);
+
+static int imapdriver_connect_stream(mailsession * session, mailstream * s);
+
+static int imapdriver_starttls(mailsession * session);
+
+static int imapdriver_login(mailsession * session,
+			    char * userid, char * password);
+
+static int imapdriver_logout(mailsession * session);
+
+static int imapdriver_noop(mailsession * session);
+
+static int imapdriver_build_folder_name(mailsession * session, char * mb,
+					char * name, char ** result);
+
+static int imapdriver_create_folder(mailsession * session, char * mb);
+
+static int imapdriver_delete_folder(mailsession * session, char * mb);
+
+static int imapdriver_rename_folder(mailsession * session, char * mb,
+				    char * new_name);
+
+static int imapdriver_check_folder(mailsession * session);
+
+static int imapdriver_examine_folder(mailsession * session, char * mb);
+
+static int imapdriver_select_folder(mailsession * session, char * mb);
+static int imapdriver_expunge_folder(mailsession * session);
+
+static int imapdriver_status_folder(mailsession * session, char * mb,
+    uint32_t * result_messages, uint32_t * result_recent,
+    uint32_t * result_unseen);
+
+static int imapdriver_messages_number(mailsession * session, char * mb,
+				      uint32_t * result);
+
+static int imapdriver_recent_number(mailsession * session, char * mb,
+				      uint32_t * result);
+
+static int imapdriver_unseen_number(mailsession * session, char * mb,
+				      uint32_t * result);
+
+static int imapdriver_list_folders(mailsession * session, char * mb,
+				    struct mail_list ** result);
+static int imapdriver_lsub_folders(mailsession * session, char * mb,
+				   struct mail_list ** result);
+static int imapdriver_subscribe_folder(mailsession * session, char * mb);
+static int imapdriver_unsubscribe_folder(mailsession * session, char * mb);
+static int imapdriver_append_message(mailsession * session,
+				     char * message, size_t size);
+static int imapdriver_copy_message(mailsession * session,
+				   uint32_t num, char * mb);
+
+static int imapdriver_get_messages_list(mailsession * session,
+					struct mailmessage_list ** result);
+
+static int
+imapdriver_get_envelopes_list(mailsession * session,
+			      struct mailmessage_list * env_list);
+
+
+#if 0
+static int imapdriver_search_messages(mailsession * session, char * charset,
+				      struct mail_search_key * key,
+				      struct mail_search_result ** result);
+#endif
+
+static int imapdriver_get_message(mailsession * session,
+				  uint32_t num, mailmessage ** result);
+
+static int imapdriver_get_message_by_uid(mailsession * session,
+    const char * uid,
+    mailmessage ** result);
+
+static mailsession_driver local_imap_session_driver = {
+  .sess_name = "imap",
+
+  .sess_initialize = imapdriver_initialize,
+  .sess_uninitialize = imapdriver_uninitialize,
+
+  .sess_parameters = NULL,
+
+  .sess_connect_stream = imapdriver_connect_stream,
+  .sess_connect_path = NULL,
+  .sess_starttls = imapdriver_starttls,
+  .sess_login = imapdriver_login,
+  .sess_logout = imapdriver_logout,
+  .sess_noop = imapdriver_noop,
+
+  .sess_build_folder_name = imapdriver_build_folder_name,
+  .sess_create_folder = imapdriver_create_folder,
+  .sess_delete_folder = imapdriver_delete_folder,
+  .sess_rename_folder = imapdriver_rename_folder,
+  .sess_check_folder = imapdriver_check_folder,
+  .sess_examine_folder = imapdriver_examine_folder,
+  .sess_select_folder = imapdriver_select_folder,
+  .sess_expunge_folder = imapdriver_expunge_folder,
+  .sess_status_folder = imapdriver_status_folder,
+  .sess_messages_number = imapdriver_messages_number,
+  .sess_recent_number = imapdriver_recent_number,
+  .sess_unseen_number = imapdriver_unseen_number,
+  .sess_list_folders = imapdriver_list_folders,
+  .sess_lsub_folders = imapdriver_lsub_folders,
+  .sess_subscribe_folder = imapdriver_subscribe_folder,
+  .sess_unsubscribe_folder = imapdriver_unsubscribe_folder,
+
+  .sess_append_message = imapdriver_append_message,
+  .sess_copy_message = imapdriver_copy_message,
+  .sess_move_message = NULL,
+
+  .sess_get_messages_list = imapdriver_get_messages_list,
+  .sess_get_envelopes_list = imapdriver_get_envelopes_list,
+  .sess_remove_message = NULL,
+#if 0
+  .sess_search_messages = imapdriver_search_messages,
+#endif
+  
+  .sess_get_message = imapdriver_get_message,
+  .sess_get_message_by_uid = imapdriver_get_message_by_uid,
+};
+
+mailsession_driver * imap_session_driver = &local_imap_session_driver;
+
+static inline struct imap_session_state_data * get_data(mailsession * session)
+{
+  return session->sess_data;
+}
+
+static mailimap * get_imap_session(mailsession * session)
+{
+  return get_data(session)->imap_session;
+}
+
+static int imapdriver_initialize(mailsession * session)
+{
+  struct imap_session_state_data * data;
+  mailimap * imap;
+  struct mail_flags_store * flags_store;
+
+  imap = mailimap_new(0, NULL);
+  if (imap == NULL)
+    goto err;
+
+  flags_store = mail_flags_store_new();
+  if (flags_store == NULL)
+    goto free_session;
+
+  data = malloc(sizeof(* data));
+  if (data == NULL)
+    goto free_flags_store;
+
+  data->imap_mailbox = NULL;
+  data->imap_session = imap;
+  data->imap_flags_store = flags_store;
+
+  session->sess_data = data;
+
+  return MAIL_NO_ERROR;
+
+ free_flags_store:
+  mail_flags_store_free(flags_store);
+ free_session:
+  mailimap_free(imap);
+ err:
+  return MAIL_ERROR_MEMORY;
+}
+
+static void imap_flags_store_process(mailimap * imap,
+				     struct mail_flags_store * flags_store)
+{
+  unsigned int i;
+  int r;
+  mailmessage * first;
+  mailmessage * last;
+
+  mail_flags_store_sort(flags_store);
+
+  if (carray_count(flags_store->fls_tab) == 0)
+    return;
+  
+  first = carray_get(flags_store->fls_tab, 0);
+  last = first;
+
+  for(i = 1 ; i < carray_count(flags_store->fls_tab) ; i ++) {
+    mailmessage * msg;
+
+    msg = carray_get(flags_store->fls_tab, i);
+
+    if (last->msg_index + 1 == msg->msg_index) {
+      r = mail_flags_compare(first->msg_flags, msg->msg_flags);
+      if (r == 0) {
+	last = msg;
+	continue;
+      }
+    }
+
+    r = imap_store_flags(imap, first->msg_index,
+        last->msg_index, first->msg_flags);
+
+    first = msg;
+    last = msg;
+  }
+
+  r = imap_store_flags(imap, first->msg_index, last->msg_index,
+      first->msg_flags);
+  
+  mail_flags_store_clear(flags_store);
+}
+
+static void imapdriver_uninitialize(mailsession * session)
+{
+  struct imap_session_state_data * data;
+
+  data = get_data(session);
+
+  imap_flags_store_process(data->imap_session,
+      data->imap_flags_store);
+  mail_flags_store_free(data->imap_flags_store); 
+  
+  mailimap_free(data->imap_session);
+  if (data->imap_mailbox != NULL)
+    free(data->imap_mailbox);
+  free(data);
+  
+  session->sess_data = NULL;
+}
+
+static int imapdriver_connect_stream(mailsession * session, mailstream * s)
+{
+  int r;
+  
+  r = mailimap_connect(get_imap_session(session), s);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_login(mailsession * session,
+			    char * userid, char * password)
+{
+  int r;
+
+  r = mailimap_login(get_imap_session(session), userid, password);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_logout(mailsession * session)
+{
+  int r;
+
+  imap_flags_store_process(get_imap_session(session),
+			   get_data(session)->imap_flags_store);
+
+  r = mailimap_logout(get_imap_session(session));
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_noop(mailsession * session)
+{
+  int r;
+
+  r = mailimap_noop(get_imap_session(session));
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_build_folder_name(mailsession * session, char * mb,
+					char * name, char ** result)
+{
+  char delimiter[2] = "X";
+  char * folder_name;
+  mailimap * imap;
+  struct mailimap_mailbox_list * mb_list;
+  int r;
+  clist * imap_list;
+
+  imap = get_imap_session(session);
+
+  r = mailimap_list(imap, mb, "", &imap_list);
+  if (r != MAILIMAP_NO_ERROR)
+    return r;
+
+  if (clist_begin(imap_list) == NULL)
+    return MAIL_ERROR_LIST;
+
+  mb_list = clist_begin(imap_list)->data;
+  delimiter[0] = mb_list->mb_delimiter;
+
+  folder_name = malloc(strlen(mb) + strlen(delimiter) + strlen(name) + 1);
+  if (folder_name == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  strcpy(folder_name, mb);
+  strcat(folder_name, delimiter);
+  strcat(folder_name, name);
+
+  * result = folder_name;
+  
+  return MAIL_NO_ERROR;
+}
+
+/* folders operations */
+
+static int imapdriver_create_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = mailimap_create(get_imap_session(session), mb);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_delete_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = mailimap_delete(get_imap_session(session), mb);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_rename_folder(mailsession * session, char * mb,
+				    char * new_name)
+{
+  int r;
+
+  r = mailimap_rename(get_imap_session(session), mb, new_name);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_check_folder(mailsession * session)
+{
+  int r;
+
+  imap_flags_store_process(get_imap_session(session),
+			   get_data(session)->imap_flags_store);
+
+  r = mailimap_check(get_imap_session(session));
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_examine_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = mailimap_examine(get_imap_session(session), mb);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_select_folder(mailsession * session, char * mb)
+{
+  int r;
+  char * new_mb;
+  char * old_mb;
+
+  old_mb = get_data(session)->imap_mailbox;
+  if (old_mb != NULL)
+    if (strcmp(mb, old_mb) == 0)
+      return MAIL_NO_ERROR;
+
+  imap_flags_store_process(get_imap_session(session),
+			   get_data(session)->imap_flags_store);
+
+  r = mailimap_select(get_imap_session(session), mb);
+
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    new_mb = strdup(mb);
+    if (new_mb == NULL) {
+      if (old_mb != NULL)
+        free(old_mb);
+      get_data(session)->imap_mailbox = NULL;
+      return MAIL_ERROR_MEMORY;
+    }
+
+    get_data(session)->imap_mailbox = new_mb;
+
+    return MAIL_NO_ERROR;
+  default:
+    return imap_error_to_mail_error(r);
+  }
+}
+
+static int imapdriver_expunge_folder(mailsession * session)
+{
+  int r;
+
+  imap_flags_store_process(get_imap_session(session),
+			   get_data(session)->imap_flags_store);
+
+  r = mailimap_expunge(get_imap_session(session));
+
+  return imap_error_to_mail_error(r);
+}
+
+static int status_selected_folder(mailsession * session, char * mb,
+    uint32_t * result_messages, uint32_t * result_recent,
+    uint32_t * result_unseen)
+{
+  int r;
+  int res;
+  mailimap * imap;
+  uint32_t exists;
+  uint32_t unseen;
+  uint32_t recent;
+  struct mailimap_search_key * search_key;
+  clist * search_result;
+  
+  imap = get_imap_session(session);
+  
+  exists = imap->imap_selection_info->sel_exists;
+  recent = imap->imap_selection_info->sel_recent;
+  
+  search_key = mailimap_search_key_new(MAILIMAP_SEARCH_KEY_UNSEEN,
+      NULL, NULL, NULL, NULL, NULL,
+      NULL, NULL, NULL, NULL, NULL,
+      NULL, NULL, NULL, NULL, 0,
+      NULL, NULL, NULL, NULL, NULL,
+      NULL, 0, NULL, NULL, NULL);
+  if (search_key == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+  
+  /* default : use the RECENT count if search fails */
+  unseen = recent;
+  r = mailimap_search(imap, NULL, search_key, &search_result);
+  mailimap_search_key_free(search_key);
+  if (r == MAILIMAP_NO_ERROR) {
+    /* if this succeed, we use the real count */
+    unseen = clist_count(search_result);
+    mailimap_mailbox_data_search_free(search_result);
+  }
+  
+  * result_messages = exists;
+  * result_unseen = unseen;
+  * result_recent = recent;
+  
+  return MAIL_NO_ERROR;
+  
+ err:
+  return res;
+}
+
+static int status_unselected_folder(mailsession * session, char * mb,
+    uint32_t * result_messages, uint32_t * result_recent,
+    uint32_t * result_unseen)
+{
+  struct mailimap_status_att_list * att_list;
+  struct mailimap_mailbox_data_status * status;
+  int r;
+  int res;
+  clistiter * cur;
+  mailimap * imap;
+  
+  imap = get_imap_session(session);
+  
+  att_list = mailimap_status_att_list_new_empty();
+  if (att_list == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+  
+  r = mailimap_status_att_list_add(att_list, MAILIMAP_STATUS_ATT_MESSAGES);
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    res = MAIL_ERROR_MEMORY;
+    goto free;
+  }
+    
+  r = mailimap_status_att_list_add(att_list, MAILIMAP_STATUS_ATT_RECENT);
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    res = MAIL_ERROR_MEMORY;
+    goto free;
+  }
+    
+  r = mailimap_status_att_list_add(att_list, MAILIMAP_STATUS_ATT_UNSEEN);
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    res = MAIL_ERROR_MEMORY;
+    goto free;
+  }
+
+  r = mailimap_status(imap, mb, att_list, &status);
+
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    res = imap_error_to_mail_error(r);
+    goto free;
+  }
+
+  * result_messages = 0;
+  * result_recent = 0;
+  * result_unseen = 0;
+  
+  for (cur = clist_begin(status->st_info_list);
+       cur != NULL ; cur = clist_next(cur)) {
+    struct mailimap_status_info * status_info;
+      
+    status_info = clist_content(cur);
+    switch (status_info->st_att) {
+    case MAILIMAP_STATUS_ATT_MESSAGES:
+      * result_messages = status_info->st_value;
+      break;
+    case MAILIMAP_STATUS_ATT_RECENT:
+      * result_recent = status_info->st_value;
+      break;
+    case MAILIMAP_STATUS_ATT_UNSEEN:
+      * result_unseen = status_info->st_value;
+      break;
+    }
+  }
+
+  mailimap_mailbox_data_status_free(status);
+  mailimap_status_att_list_free(att_list);
+  
+  return MAIL_NO_ERROR;
+
+ free:
+  mailimap_status_att_list_free(att_list);
+ err:
+  return res;
+}
+
+static int imapdriver_status_folder(mailsession * session, char * mb,
+    uint32_t * result_messages, uint32_t * result_recent,
+    uint32_t * result_unseen)
+{
+  int res;
+  int current_folder;
+  char * current_mb;
+  
+  if (mb == NULL) {
+    mb = get_data(session)->imap_mailbox;
+    if (mb == NULL) {
+      res = MAIL_ERROR_BAD_STATE;
+      goto err;
+    }
+  }
+  
+  current_mb = get_data(session)->imap_mailbox;
+  if (strcmp(mb, current_mb) == 0)
+    current_folder = 1;
+  else
+    current_folder = 0;
+  
+  if (current_folder)
+    return status_selected_folder(session, mb, result_messages,
+        result_recent, result_unseen);
+  else
+    return status_unselected_folder(session, mb, result_messages,
+        result_recent, result_unseen);
+  
+ err:
+  return res;
+}
+
+/* TODO : more efficient functions */
+
+static int imapdriver_messages_number(mailsession * session, char * mb,
+				      uint32_t * result)
+{
+  uint32_t messages;
+  uint32_t recent;
+  uint32_t unseen;
+  int r;
+  
+  r = imapdriver_status_folder(session, mb, &messages, &recent, &unseen);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  * result = messages;
+ 
+  return MAIL_NO_ERROR;
+}
+
+static int imapdriver_recent_number(mailsession * session, char * mb,
+				    uint32_t * result)
+{
+  uint32_t messages;
+  uint32_t recent;
+  uint32_t unseen;
+  int r;
+  
+  r = imapdriver_status_folder(session, mb, &messages, &recent, &unseen);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  * result = recent;
+ 
+  return MAIL_NO_ERROR;
+}
+
+static int imapdriver_unseen_number(mailsession * session, char * mb,
+				    uint32_t * result)
+{
+  uint32_t messages;
+  uint32_t recent;
+  uint32_t unseen;
+  int r;
+  
+  r = imapdriver_status_folder(session, mb, &messages, &recent, &unseen);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  * result = unseen;
+ 
+  return MAIL_NO_ERROR;
+}
+
+enum {
+  IMAP_LIST, IMAP_LSUB
+};
+
+static int imapdriver_list_lsub_folders(mailsession * session, int type,
+					char * mb,
+					struct mail_list ** result)
+{
+  clist * imap_list;
+  struct mail_list * resp;
+  int r;
+  int res;
+
+  switch (type) {
+  case IMAP_LIST:
+    r = mailimap_list(get_imap_session(session), mb,
+		      "*", &imap_list);
+    break;
+  case IMAP_LSUB:
+    r = mailimap_lsub(get_imap_session(session), mb,
+		      "*", &imap_list);
+    break;
+  default:
+    res = MAIL_ERROR_LIST;
+    goto err;
+  }
+
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    res = imap_error_to_mail_error(r);
+    goto err;
+  }
+
+  r = imap_list_to_list(imap_list, &resp);
+  if (r != MAIL_NO_ERROR) {
+    mailimap_list_result_free(imap_list);
+    res = r;
+    goto err;
+  }
+
+  mailimap_list_result_free(imap_list);
+
+  * result = resp;
+
+  return MAIL_NO_ERROR;
+
+ err:
+  return res;
+}
+
+static int imapdriver_list_folders(mailsession * session, char * mb,
+				   struct mail_list ** result)
+{
+  return imapdriver_list_lsub_folders(session, IMAP_LIST, mb,
+				      result);
+}
+
+static int imapdriver_lsub_folders(mailsession * session, char * mb,
+				   struct mail_list ** result)
+{
+  return imapdriver_list_lsub_folders(session, IMAP_LSUB, mb,
+				      result);
+}
+
+static int imapdriver_subscribe_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = mailimap_subscribe(get_imap_session(session), mb);
+
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_unsubscribe_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = mailimap_unsubscribe(get_imap_session(session), mb);
+
+  return imap_error_to_mail_error(r);
+}
+
+/* messages operations */
+
+static int imapdriver_append_message(mailsession * session,
+				     char * message, size_t size)
+{
+  int r;
+
+  r = mailimap_append_simple(get_imap_session(session),
+      get_data(session)->imap_mailbox,
+      message, size);
+  
+  return imap_error_to_mail_error(r);
+}
+
+static int imapdriver_copy_message(mailsession * session,
+				   uint32_t num, char * mb)
+{
+  int r;
+  struct mailimap_set * set;
+  int res;
+
+  set = mailimap_set_new_single(num);
+  if (set == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+
+  r = mailimap_uid_copy(get_imap_session(session), set, mb);
+
+  mailimap_set_free(set);
+
+  return imap_error_to_mail_error(r);
+
+ err:
+  return res;
+}
+
+static int imapdriver_get_messages_list(mailsession * session,
+					struct mailmessage_list ** result)
+{
+  return imap_get_messages_list(get_imap_session(session),
+      session, imap_message_driver, 1,
+      result);
+}
+
+
+
+static int
+imapdriver_get_envelopes_list(mailsession * session,
+			      struct mailmessage_list * env_list)
+{
+  struct mailimap_set * set;
+  struct mailimap_fetch_att * fetch_att;
+  struct mailimap_fetch_type * fetch_type;
+  int res;
+  clist * fetch_result;
+  int r;
+  uint32_t exists;
+  clist * msg_list;
+  
+  if (get_imap_session(session)->imap_selection_info == NULL) {
+    res = MAIL_ERROR_BAD_STATE;
+    goto err;
+  }
+
+  imap_flags_store_process(get_imap_session(session),
+			   get_data(session)->imap_flags_store);
+
+  exists = get_imap_session(session)->imap_selection_info->sel_exists;
+
+  if (exists == 0)
+    return MAIL_NO_ERROR;
+
+  fetch_type = mailimap_fetch_type_new_fetch_att_list_empty();
+  if (fetch_type == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+
+  fetch_att = mailimap_fetch_att_new_uid();
+  if (fetch_att == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto free_fetch_type;
+  }
+
+  r = mailimap_fetch_type_new_fetch_att_list_add(fetch_type, fetch_att);
+  if (r != MAILIMAP_NO_ERROR) {
+    mailimap_fetch_att_free(fetch_att);
+    res = MAIL_ERROR_MEMORY;
+    goto free_fetch_type;
+  }
+
+  fetch_att = mailimap_fetch_att_new_flags();
+  if (fetch_att == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto free_fetch_type;
+  }
+
+  r = mailimap_fetch_type_new_fetch_att_list_add(fetch_type, fetch_att);
+  if (r != MAILIMAP_NO_ERROR) {
+    mailimap_fetch_att_free(fetch_att);
+    res = MAIL_ERROR_MEMORY;
+    goto free_fetch_type;
+  }
+
+  r = imap_add_envelope_fetch_att(fetch_type);
+  if (r != MAIL_NO_ERROR) {
+    res = r;
+    goto free_fetch_type;
+  }
+
+  r = maildriver_env_list_to_msg_list(env_list, &msg_list);
+  if (r != MAIL_NO_ERROR) {
+    res = MAIL_ERROR_MEMORY;
+    goto free_fetch_type;
+  }
+
+  if (clist_begin(msg_list) == NULL) {
+    /* no need to fetch envelopes */
+
+    mailimap_fetch_type_free(fetch_type);
+    clist_free(msg_list);
+    return MAIL_NO_ERROR;
+  }
+
+  r = msg_list_to_imap_set(msg_list, &set);
+  if (r != MAIL_NO_ERROR) {
+    clist_foreach(msg_list, (clist_func) free, NULL);
+    clist_free(msg_list);
+    res = MAIL_ERROR_MEMORY;
+    goto free_fetch_type;
+  }
+  clist_foreach(msg_list, (clist_func) free, NULL);
+  clist_free(msg_list);
+
+  r = mailimap_uid_fetch(get_imap_session(session), set,
+			 fetch_type, &fetch_result);
+
+  mailimap_fetch_type_free(fetch_type);
+  mailimap_set_free(set);
+
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    return imap_error_to_mail_error(r);
+  }
+
+  if (clist_begin(fetch_result) == NULL) {
+    res = MAIL_ERROR_FETCH;
+    goto err;
+  }
+
+  r = imap_fetch_result_to_envelop_list(fetch_result, env_list);
+  mailimap_fetch_list_free(fetch_result);
+
+  if (r != MAIL_NO_ERROR) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+
+  return MAIL_NO_ERROR;
+  
+ free_fetch_type:
+  mailimap_fetch_type_free(fetch_type);
+ err:
+  return res;
+}
+
+
+#if 0
+static int imapdriver_search_messages(mailsession * session, char * charset,
+				      struct mail_search_key * key,
+				      struct mail_search_result ** result)
+{
+  struct mailimap_search_key * imap_key;
+  int r;
+  clist * imap_result;
+  clist * result_list;
+  struct mail_search_result * search_result;
+  clistiter * cur;
+
+  r = mail_search_to_imap_search(key, &imap_key);
+  if (r != MAIL_NO_ERROR)
+    return MAIL_ERROR_MEMORY;
+
+  r = mailimap_uid_search(get_imap_session(session), charset, imap_key,
+			  &imap_result);
+
+  mailimap_search_key_free(imap_key);
+
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    return imap_error_to_mail_error(r);
+  }
+
+  result_list = clist_new();
+  if (result_list == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  for(cur = clist_begin(imap_result) ; cur != NULL ; cur = clist_next(cur)) {
+    uint32_t val = * (uint32_t *) clist_content(cur);
+    uint32_t * new;
+    
+    new = malloc(sizeof(* new));
+    if (new == NULL) {
+      goto free_imap_result;
+    }
+
+    * new = val;
+
+    r = clist_append(result_list, new);
+    if (r != 0) {
+      free(new);
+      goto free_imap_result;
+    }
+  }
+
+  search_result = mail_search_result_new(result_list);
+  if (search_result == NULL)
+    goto free_imap_result;
+
+  mailimap_search_result_free(imap_result);
+
+  * result = search_result;
+
+  return MAIL_NO_ERROR;
+  
+ free_imap_result:
+  mailimap_search_result_free(imap_result);
+  return MAIL_ERROR_MEMORY;
+}
+#endif
+
+static int imapdriver_starttls(mailsession * session)
+{
+  mailimap * imap;
+  int r;
+  struct mailimap_capability_data * cap_data;
+  clistiter * cur;
+  int starttls;
+  int fd;
+  mailstream_low * low;
+  mailstream_low * new_low;
+  int capability_available;
+  
+  imap = get_imap_session(session);
+
+  capability_available = FALSE;
+  if (imap->imap_connection_info != NULL)
+    if (imap->imap_connection_info->imap_capability != NULL) {
+      capability_available = TRUE;
+      cap_data = imap->imap_connection_info->imap_capability;
+    }
+
+  if (!capability_available) {
+    r = mailimap_capability(imap, &cap_data);
+    switch (r) {
+    case MAILIMAP_NO_ERROR:
+      break;
+    default:
+      return imap_error_to_mail_error(r);
+    }
+  }
+
+  starttls = FALSE;
+  for(cur = clist_begin(cap_data->cap_list) ; cur != NULL ;
+      cur = clist_next(cur)) {
+    struct mailimap_capability * cap;
+
+    cap = clist_content(cur);
+
+    if (cap->cap_type == MAILIMAP_CAPABILITY_NAME)
+      if (strcasecmp(cap->cap_data.cap_name, "STARTTLS") == 0) {
+	starttls = TRUE;
+	break;
+      }
+  }
+
+  if (!capability_available)
+    mailimap_capability_data_free(cap_data);
+
+  if (!starttls)
+    return MAIL_ERROR_NO_TLS;
+  
+  r = mailimap_starttls(imap);
+
+  switch (r) {
+  case MAILIMAP_NO_ERROR:
+    break;
+  default:
+    return imap_error_to_mail_error(r);
+  }
+
+  low = mailstream_get_low(imap->imap_stream);
+  fd = mailstream_low_get_fd(low);
+  if (fd == -1)
+    return MAIL_ERROR_STREAM;
+  
+  new_low = mailstream_low_ssl_open(fd);
+  if (new_low == NULL)
+    return MAIL_ERROR_STREAM;
+
+  mailstream_low_free(low);
+  mailstream_set_low(imap->imap_stream, new_low);
+  
+  return MAIL_NO_ERROR;
+}
+
+static int imapdriver_get_message(mailsession * session,
+				  uint32_t num, mailmessage ** result)
+{
+  mailmessage * msg_info;
+  int r;
+
+  msg_info = mailmessage_new();
+  if (msg_info == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  r = mailmessage_init(msg_info, session, imap_message_driver, num, 0);
+  if (r != MAIL_NO_ERROR) {
+    mailmessage_free(msg_info);
+    return r;
+  }
+
+  * result = msg_info;
+
+  return MAIL_NO_ERROR;
+}
+
+/* Retrieve a message by UID
+   
+   libEtPan! uid format for IMAP is "UIDVALIDITY-UID"
+   where UIDVALIDITY and UID are decimal representation of 
+   respectively uidvalidity and uid numbers. 
+   
+   Return value:
+   MAIL_ERROR_INVAL if uid is NULL or has an incorrect format.
+   MAIL_ERROR_MSG_NOT_FOUND if uidvalidity has changed or uid was not found
+   MAIL_NO_ERROR if message was found. Result is in result
+*/
+
+static int imapdriver_get_message_by_uid(mailsession * session,
+    const char * uid,
+    mailmessage ** result)
+{
+  uint32_t uidvalidity;
+  uint32_t num;
+  char * p1, * p2;
+  mailimap * imap;
+
+  if (uid == NULL)
+    return MAIL_ERROR_INVAL;
+
+  uidvalidity = strtoul(uid, &p1, 10);
+  if (p1 == uid || * p1 != '-')
+    return MAIL_ERROR_INVAL;
+
+  p1++;
+  num = strtoul(p1, &p2, 10);
+  if (p2 == p1 || * p2 != '\0')
+    return MAIL_ERROR_INVAL;
+  
+  imap = get_imap_session(session);
+  if (imap->imap_selection_info->sel_uidvalidity != uidvalidity)
+    return MAIL_ERROR_MSG_NOT_FOUND;
+
+  return imapdriver_get_message(session, num, result);
+}