talons

session.c (22351B)

---

 /*
  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
  * Copyright (C) 1999-2021 the Claws Mail team and Hiroyuki Yamamoto
  *
  * 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 3 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, see <http://www.gnu.org/licenses/>.
  *
  */
 
 #include "defs.h"
 
 #include <glib.h>
 #include <glib/gi18n.h>
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <time.h>
 #include <errno.h>
 
 #include "session.h"
 #include "utils.h"
 #include "log.h"
 
 static gint session_connect_cb		(SockInfo	*sock,
 					 gpointer	 data);
 static gint session_close		(Session	*session);
 
 static gboolean session_timeout_cb	(gpointer	 data);
 
 static gboolean session_recv_msg_idle_cb	(gpointer	 data);
 static gboolean session_recv_data_idle_cb	(gpointer	 data);
 
 static gboolean session_read_msg_cb	(SockInfo	*source,
 					 GIOCondition	 condition,
 					 gpointer	 data);
 static gboolean session_read_data_cb	(SockInfo	*source,
 					 GIOCondition	 condition,
 					 gpointer	 data);
 static gboolean session_write_msg_cb	(SockInfo	*source,
 					 GIOCondition	 condition,
 					 gpointer	 data);
 static gboolean session_write_data_cb	(SockInfo	*source,
 					 GIOCondition	 condition,
 					 gpointer	 data);
 
 
 void session_init(Session *session, const void *prefs_account, gboolean is_smtp)
 {
 	session->type = SESSION_UNKNOWN;
 	session->sock = NULL;
 	session->server = NULL;
 	session->port = 0;
 	session->ssl_type = SSL_NONE;
 	session->use_tls_sni = TRUE;
 	session->nonblocking = TRUE;
 	session->state = SESSION_READY;
 	session->last_access_time = time(NULL);
 
 	session->tv_prev = g_date_time_new_now_local();
 
 	session->conn_id = 0;
 
 	session->io_tag = 0;
 
 	session->read_buf_p = session->read_buf;
 	session->read_buf_len = 0;
 
 	session->read_msg_buf = g_string_sized_new(1024);
 	session->read_data_buf = g_byte_array_new();
 
 	session->write_buf = NULL;
 	session->write_buf_p = NULL;
 	session->write_buf_len = 0;
 
 	session->write_data = NULL;
 	session->write_data_p = NULL;
 	session->write_data_len = 0;
 
 	session->timeout_tag = 0;
 	session->timeout_interval = 0;
 
 	session->data = NULL;
 	session->account = prefs_account;
 	session->is_smtp = is_smtp;
 
 	session->ping_tag = -1;
 }
 
 /*!
  *\brief	Set up parent and child process
  *		Childloop: Read commands from parent,
  *		send to server, get answer, pass to parent
  *
  *\param	session Contains session information
  *		server to connect to
  *		port to connect to
  *
  *\return	 0 : success
  *		-1 : pipe / fork errors (parent)
  *		 1 : connection error (child)
  */
 gint session_connect(Session *session, const gchar *server, gushort port)
 {
 	session->server = g_strdup(server);
 	session->port = port;
 
 #ifdef G_OS_UNIX
 	session->conn_id = sock_connect_async(server, port, session_connect_cb,
 					      session);
 	if (session->conn_id < 0) {
 		g_warning("can't connect to server");
 		session_close(session);
 		if (session->connect_finished)
 			session->connect_finished(session, FALSE);
 		return -1;
 	}
 
 	return 0;
 #else
 	SockInfo *sock;
 
 	sock = sock_connect(server, port);
 	if (sock == NULL) {
 		g_warning("can't connect to server");
 		session_close(session);
 		if (session->connect_finished)
 			session->connect_finished(session, FALSE);
 		return -1;
 	}
 	sock->is_smtp = session->is_smtp;
 
 	return session_connect_cb(sock, session);
 #endif
 }
 
 static gint session_connect_cb(SockInfo *sock, gpointer data)
 {
 	Session *session = SESSION(data);
 
 	session->conn_id = 0;
 
 	if (!sock) {
 		g_warning("can't connect to server");
 		session->state = SESSION_ERROR;
 		if (session->connect_finished)
 			session->connect_finished(session, FALSE);
 		return -1;
 	}
 
 	session->sock = sock;
 	sock->account = session->account;
 	sock->is_smtp = session->is_smtp;
 	sock->ssl_cert_auto_accept = TRUE;
 
 	sock->gnutls_priority = session->gnutls_priority;
 	sock->use_tls_sni = session->use_tls_sni;
 
 	if (session->ssl_type == SSL_TUNNEL) {
 		sock_set_nonblocking_mode(sock, FALSE);
 		if (!ssl_init_socket(sock)) {
 			g_warning("can't initialize TLS");
 			log_error(LOG_PROTOCOL, _("TLS handshake failed\n"));
 			session->state = SESSION_ERROR;
 			if (session->connect_finished)
 				session->connect_finished(session, FALSE);
 			return -1;
 		}
 	}
 
 	/* we could have gotten a timeout while waiting for user input in
 	 * an SSL certificate dialog */
 	if (session->state == SESSION_TIMEOUT) {
 		if (session->connect_finished)
 			session->connect_finished(session, FALSE);
 		return -1;
 	}
 
 	sock_set_nonblocking_mode(sock, session->nonblocking);
 
 	debug_print("session (%p): connected\n", session);
 
 	session->state = SESSION_RECV;
 	session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 					 session_read_msg_cb,
 					 session);
 
 	if (session->connect_finished)
 		session->connect_finished(session, TRUE);
 	return 0;
 }
 
 /*!
  *\brief	child and parent: send DISCONNECT message to other process
  *
  *\param	session Contains session information
  *
  *\return	 0 : success
  */
 gint session_disconnect(Session *session)
 {
 	session_close(session);
 	return 0;
 }
 
 /*!
  *\brief	parent ?
  *
  *\param	session Contains session information
  */
 void session_destroy(Session *session)
 {
 	cm_return_if_fail(session != NULL);
 	cm_return_if_fail(session->destroy != NULL);
 
 	session_register_ping(session, NULL);
 
 	session_close(session);
 	session->destroy(session);
 	g_free(session->server);
 	g_string_free(session->read_msg_buf, TRUE);
 	g_byte_array_free(session->read_data_buf, TRUE);
 	g_free(session->read_data_terminator);
 	g_free(session->write_buf);
 	g_free(session->gnutls_priority);
 	g_date_time_unref(session->tv_prev);
 	debug_print("session (%p): destroyed\n", session);
 
 	g_free(session);
 }
 
 gboolean session_is_running(Session *session)
 {
 	return (session->state == SESSION_READY ||
 		session->state == SESSION_SEND ||
 		session->state == SESSION_RECV);
 }
 
 gboolean session_is_connected(Session *session)
 {
 	return (session->state == SESSION_SEND ||
 		session->state == SESSION_RECV);
 }
 
 void session_set_access_time(Session *session)
 {
 	session->last_access_time = time(NULL);
 }
 
 void session_set_timeout(Session *session, guint interval)
 {
 	if (session->timeout_tag > 0)
 		g_source_remove(session->timeout_tag);
 
 	session->timeout_interval = interval;
 	if (interval > 0) {
 		if (interval % 1000 == 0)
 			session->timeout_tag =
 				g_timeout_add_seconds(interval/1000, session_timeout_cb, session);
 		else
 			session->timeout_tag =
 				g_timeout_add(interval, session_timeout_cb, session);
 	} else
 		session->timeout_tag = 0;
 }
 
 static gboolean session_timeout_cb(gpointer data)
 {
 	Session *session = SESSION(data);
 
 	g_warning("session timeout");
 
 	if (session->io_tag > 0) {
 		g_source_remove(session->io_tag);
 		session->io_tag = 0;
 	}
 
 	session->timeout_tag = 0;
 	session->state = SESSION_TIMEOUT;
 
 	return FALSE;
 }
 
 void session_set_recv_message_notify(Session *session,
 				     RecvMsgNotify notify_func, gpointer data)
 {
 	session->recv_msg_notify = notify_func;
 	session->recv_msg_notify_data = data;
 }
 
 void session_set_recv_data_progressive_notify
 					(Session *session,
 					 RecvDataProgressiveNotify notify_func,
 					 gpointer data)
 {
 	session->recv_data_progressive_notify = notify_func,
 	session->recv_data_progressive_notify_data = data;
 }
 
 void session_set_recv_data_notify(Session *session, RecvDataNotify notify_func,
 				  gpointer data)
 {
 	session->recv_data_notify = notify_func;
 	session->recv_data_notify_data = data;
 }
 
 void session_set_send_data_progressive_notify
 					(Session *session,
 					 SendDataProgressiveNotify notify_func,
 					 gpointer data)
 {
 	session->send_data_progressive_notify = notify_func;
 	session->send_data_progressive_notify_data = data;
 }
 
 void session_set_send_data_notify(Session *session, SendDataNotify notify_func,
 				  gpointer data)
 {
 	session->send_data_notify = notify_func;
 	session->send_data_notify_data = data;
 }
 
 /*!
  *\brief	child and parent cleanup (child closes first)
  *
  *\param	session Contains session information
  *
  *\return	 0 : success
  */
 static gint session_close(Session *session)
 {
 	cm_return_val_if_fail(session != NULL, -1);
 
 #ifdef G_OS_UNIX
 	if (session->conn_id > 0) {
 		sock_connect_async_cancel(session->conn_id);
 		session->conn_id = 0;
 		debug_print("session (%p): connection cancelled\n", session);
 	}
 #endif
 
 	session_set_timeout(session, 0);
 
 	if (session->io_tag > 0) {
 		g_source_remove(session->io_tag);
 		session->io_tag = 0;
 	}
 
 	if (session->sock) {
 		sock_close(session->sock, TRUE);
 		session->sock = NULL;
 		session->state = SESSION_DISCONNECTED;
 		debug_print("session (%p): closed\n", session);
 	}
 
 	return 0;
 }
 
 gint session_start_tls(Session *session)
 {
 	gboolean nb_mode;
 
 	nb_mode = sock_is_nonblocking_mode(session->sock);
 
 	session->sock->ssl_cert_auto_accept = session->ssl_cert_auto_accept;
 	session->sock->gnutls_priority = session->gnutls_priority;
 	session->sock->use_tls_sni = session->use_tls_sni;
 
 	if (nb_mode)
 		sock_set_nonblocking_mode(session->sock, FALSE);
 
 	if (!ssl_init_socket(session->sock)) {
 		g_warning("couldn't start STARTTLS session");
 		if (nb_mode)
 			sock_set_nonblocking_mode(session->sock, session->nonblocking);
 		return -1;
 	}
 
 	if (0 < session->read_buf_len) {
 		g_warning("protocol violation: suffix data after STARTTLS detected");
 		if (nb_mode)
 			sock_set_nonblocking_mode(session->sock, session->nonblocking);
 		return -1;
 	}
 
 	if (nb_mode)
 		sock_set_nonblocking_mode(session->sock, session->nonblocking);
 
 	return 0;
 }
 
 gint session_send_msg(Session *session, const gchar *msg)
 {
 	gboolean ret;
 
 	cm_return_val_if_fail(session->write_buf == NULL, -1);
 	cm_return_val_if_fail(msg != NULL, -1);
 
 	session->state = SESSION_SEND;
 	session->write_buf = g_strconcat((strlen(msg) > 0 ? msg : ""), "\r\n", NULL);
 	session->write_buf_p = session->write_buf;
 	session->write_buf_len = strlen(msg) + 2;
 
 	ret = session_write_msg_cb(session->sock, G_IO_OUT, session);
 
 	if (ret == TRUE)
 		session->io_tag = sock_add_watch(session->sock, G_IO_OUT,
 						 session_write_msg_cb, session);
 	else if (session->state == SESSION_ERROR)
 		return -1;
 
 	return 0;
 }
 
 gint session_recv_msg(Session *session)
 {
 	cm_return_val_if_fail(session->read_msg_buf->len == 0, -1);
 
 	session->state = SESSION_RECV;
 
 	if (session->read_buf_len > 0)
 		g_idle_add(session_recv_msg_idle_cb, session);
 	else
 		session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 						 session_read_msg_cb, session);
 
 	return 0;
 }
 
 static gboolean session_recv_msg_idle_cb(gpointer data)
 {
 	Session *session = SESSION(data);
 	gboolean ret;
 
 	ret = session_read_msg_cb(session->sock, G_IO_IN, session);
 
 	if (ret == TRUE)
 		session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 						 session_read_msg_cb, session);
 
 	return FALSE;
 }
 
 /*!
  *\brief	parent (child?): send data to other process
  *
  *\param	session Contains session information
  *		data Data to send
  *		size Bytes to send
  *
  *\return	 0 : success
  *		-1 : error
  */
 gint session_send_data(Session *session, const guchar *data, guint size)
 {
 	gboolean ret;
 
 	cm_return_val_if_fail(session->write_data == NULL, -1);
 	cm_return_val_if_fail(data != NULL, -1);
 	cm_return_val_if_fail(size != 0, -1);
 
 	session->state = SESSION_SEND;
 
 	session->write_data = data;
 	session->write_data_p = session->write_data;
 	session->write_data_len = size;
 	g_date_time_unref(session->tv_prev);
         session->tv_prev = g_date_time_new_now_local();
 
 	ret = session_write_data_cb(session->sock, G_IO_OUT, session);
 
 	if (ret == TRUE)
 		session->io_tag = sock_add_watch(session->sock, G_IO_OUT,
 						 session_write_data_cb,
 						 session);
 	else if (session->state == SESSION_ERROR)
 		return -1;
 
 	return 0;
 }
 
 gint session_recv_data(Session *session, guint size, const gchar *terminator)
 {
 	cm_return_val_if_fail(session->read_data_buf->len == 0, -1);
 
 	session->state = SESSION_RECV;
 
 	g_free(session->read_data_terminator);
 	session->read_data_terminator = g_strdup(terminator);
 	g_date_time_unref(session->tv_prev);
         session->tv_prev = g_date_time_new_now_local();
 
 	if (session->read_buf_len > 0)
 		g_idle_add(session_recv_data_idle_cb, session);
 	else
 		session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 						 session_read_data_cb, session);
 
 	return 0;
 }
 
 static gboolean session_recv_data_idle_cb(gpointer data)
 {
 	Session *session = SESSION(data);
 	gboolean ret;
 
 	ret = session_read_data_cb(session->sock, G_IO_IN, session);
 
 	if (ret == TRUE)
 		session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 						 session_read_data_cb, session);
 
 	return FALSE;
 }
 
 static gboolean session_read_msg_cb(SockInfo *source, GIOCondition condition,
 				    gpointer data)
 {
 	Session *session = SESSION(data);
 	gchar buf[SESSION_BUFFSIZE];
 	gint line_len;
 	gchar *newline;
 	gchar *msg;
 	gint ret;
 
 	cm_return_val_if_fail(condition == G_IO_IN, FALSE);
 
 	session_set_timeout(session, session->timeout_interval);
 
 	if (session->read_buf_len == 0) {
 		gint read_len = -1;
 
 		if (session->sock)
 			read_len = sock_read(session->sock, session->read_buf,
 				     SESSION_BUFFSIZE - 1);
 
 		if (read_len == -1 && session->state == SESSION_DISCONNECTED) {
 			g_warning("sock_read: session disconnected");
 			if (session->io_tag > 0) {
 				g_source_remove(session->io_tag);
 				session->io_tag = 0;
 			}
 			return FALSE;
 		}
 
 		if (read_len == 0) {
 			g_warning("sock_read: received EOF");
 			session->state = SESSION_EOF;
 			return FALSE;
 		}
 
 		if (read_len < 0) {
 			switch (errno) {
 			case EAGAIN:
 				return TRUE;
 			default:
 				g_warning("sock_read: %s", g_strerror(errno));
 				session->state = SESSION_ERROR;
 				return FALSE;
 			}
 		}
 
 		session->read_buf_len = read_len;
 	}
 
 	if ((newline = memchr(session->read_buf_p, '\n', session->read_buf_len))
 		!= NULL)
 		line_len = newline - session->read_buf_p + 1;
 	else
 		line_len = session->read_buf_len;
 
 	if (line_len == 0)
 		return TRUE;
 
 	memcpy(buf, session->read_buf_p, line_len);
 	buf[line_len] = '\0';
 
 	g_string_append(session->read_msg_buf, buf);
 
 	session->read_buf_len -= line_len;
 	if (session->read_buf_len == 0)
 		session->read_buf_p = session->read_buf;
 	else
 		session->read_buf_p += line_len;
 
 	/* incomplete read */
 	if (buf[line_len - 1] != '\n')
 		return TRUE;
 
 	/* complete */
 	if (session->io_tag > 0) {
 		g_source_remove(session->io_tag);
 		session->io_tag = 0;
 	}
 
 	/* callback */
 	msg = g_strdup(session->read_msg_buf->str);
 	strretchomp(msg);
 	g_string_truncate(session->read_msg_buf, 0);
 
 	ret = session->recv_msg(session, msg);
 	session->recv_msg_notify(session, msg, session->recv_msg_notify_data);
 
 	g_free(msg);
 
 	if (ret < 0)
 		session->state = SESSION_ERROR;
 
 	return FALSE;
 }
 
 static gboolean session_read_data_cb(SockInfo *source, GIOCondition condition,
 				     gpointer data)
 {
 	Session *session = SESSION(data);
 	GByteArray *data_buf;
 	gint terminator_len;
 	gboolean complete = FALSE;
 	guint data_len;
 	gint ret;
 
 	cm_return_val_if_fail(condition == G_IO_IN, FALSE);
 
 	session_set_timeout(session, session->timeout_interval);
 
 	if (session->read_buf_len == 0) {
 		gint read_len;
 
 		read_len = sock_read(session->sock, session->read_buf,
 				     SESSION_BUFFSIZE);
 
 		if (read_len == 0) {
 			g_warning("sock_read: received EOF");
 			session->state = SESSION_EOF;
 			return FALSE;
 		}
 
 		if (read_len < 0) {
 			switch (errno) {
 			case EAGAIN:
 				return TRUE;
 			default:
 				g_warning("sock_read: %s", g_strerror(errno));
 				session->state = SESSION_ERROR;
 				return FALSE;
 			}
 		}
 
 		session->read_buf_len = read_len;
 	}
 
 	data_buf = session->read_data_buf;
 	terminator_len = strlen(session->read_data_terminator);
 
 	if (session->read_buf_len == 0)
 		return TRUE;
 
 	g_byte_array_append(data_buf, session->read_buf_p,
 			    session->read_buf_len);
 
 	session->read_buf_len = 0;
 	session->read_buf_p = session->read_buf;
 
 	/* check if data is terminated */
 	if (data_buf->len >= terminator_len) {
 		if (memcmp(data_buf->data, session->read_data_terminator,
 			   terminator_len) == 0)
 			complete = TRUE;
 		else if (data_buf->len >= terminator_len + 2 &&
 			 memcmp(data_buf->data + data_buf->len -
 				(terminator_len + 2), "\r\n", 2) == 0 &&
 			 memcmp(data_buf->data + data_buf->len -
 				terminator_len, session->read_data_terminator,
 				terminator_len) == 0)
 			complete = TRUE;
 	}
 
 	/* incomplete read */
 	if (!complete) {
 		GDateTime *tv_cur = g_date_time_new_now_local();
 
 		GTimeSpan ts = g_date_time_difference(tv_cur, session->tv_prev);
                 if (1000 - ts < 0 || ts > UI_REFRESH_INTERVAL) {
                         session->recv_data_progressive_notify
                                 (session, data_buf->len, 0,
                                  session->recv_data_progressive_notify_data);
 			g_date_time_unref(session->tv_prev);
                         session->tv_prev = g_date_time_new_now_local();
                 }
 		g_date_time_unref(tv_cur);
 		return TRUE;
 	}
 
 	/* complete */
 	if (session->io_tag > 0) {
 		g_source_remove(session->io_tag);
 		session->io_tag = 0;
 	}
 
 	data_len = data_buf->len - terminator_len;
 
 	/* callback */
 	ret = session->recv_data_finished(session, (gchar *)data_buf->data,
 					  data_len);
 
 	g_byte_array_set_size(data_buf, 0);
 
 	session->recv_data_notify(session, data_len,
 				  session->recv_data_notify_data);
 
 	if (ret < 0)
 		session->state = SESSION_ERROR;
 
 	return FALSE;
 }
 
 static gint session_write_buf(Session *session)
 {
 	gint write_len;
 	gint to_write_len;
 
 	cm_return_val_if_fail(session->write_buf != NULL, -1);
 	cm_return_val_if_fail(session->write_buf_p != NULL, -1);
 	cm_return_val_if_fail(session->write_buf_len > 0, -1);
 
 	to_write_len = session->write_buf_len -
 		(session->write_buf_p - session->write_buf);
 	to_write_len = MIN(to_write_len, SESSION_BUFFSIZE);
 
 	write_len = sock_write(session->sock, session->write_buf_p,
 			       to_write_len);
 
 	if (write_len < 0) {
 		switch (errno) {
 		case EAGAIN:
 			write_len = 0;
 			break;
 		default:
 			g_warning("sock_write: %s", g_strerror(errno));
 			session->state = SESSION_ERROR;
 			return -1;
 		}
 	}
 
 	/* incomplete write */
 	if (session->write_buf_p - session->write_buf + write_len <
 	    session->write_buf_len) {
 		session->write_buf_p += write_len;
 		return 1;
 	}
 
 	g_free(session->write_buf);
 	session->write_buf = NULL;
 	session->write_buf_p = NULL;
 	session->write_buf_len = 0;
 
 	return 0;
 }
 
 static gint session_write_data(Session *session)
 {
 	gint write_len;
 	gint to_write_len;
 
 	cm_return_val_if_fail(session->write_data != NULL, -1);
 	cm_return_val_if_fail(session->write_data_p != NULL, -1);
 	cm_return_val_if_fail(session->write_data_len > 0, -1);
 
 	to_write_len = session->write_data_len -
 		(session->write_data_p - session->write_data);
 	to_write_len = MIN(to_write_len, SESSION_BUFFSIZE);
 
 	write_len = sock_write(session->sock, session->write_data_p,
 			       to_write_len);
 
 	if (write_len < 0) {
 		switch (errno) {
 		case EAGAIN:
 			write_len = 0;
 			break;
 		default:
 			g_warning("sock_write: %s", g_strerror(errno));
 			session->state = SESSION_ERROR;
 			return -1;
 		}
 	}
 
 	/* incomplete write */
 	if (session->write_data_p - session->write_data + write_len <
 	    session->write_data_len) {
 		session->write_data_p += write_len;
 		return 1;
 	}
 
 	session->write_data = NULL;
 	session->write_data_p = NULL;
 	session->write_data_len = 0;
 
 	return 0;
 }
 
 static gboolean session_write_msg_cb(SockInfo *source, GIOCondition condition,
 				     gpointer data)
 {
 	Session *session = SESSION(data);
 	gint ret;
 
 	cm_return_val_if_fail(condition == G_IO_OUT, FALSE);
 	cm_return_val_if_fail(session->write_buf != NULL, FALSE);
 	cm_return_val_if_fail(session->write_buf_p != NULL, FALSE);
 	cm_return_val_if_fail(session->write_buf_len > 0, FALSE);
 
 	ret = session_write_buf(session);
 
 	if (ret < 0) {
 		session->state = SESSION_ERROR;
 		return FALSE;
 	} else if (ret > 0)
 		return TRUE;
 
 	if (session->io_tag > 0) {
 		g_source_remove(session->io_tag);
 		session->io_tag = 0;
 	}
 
 	session_recv_msg(session);
 
 	return FALSE;
 }
 
 static gboolean session_write_data_cb(SockInfo *source,
 				      GIOCondition condition, gpointer data)
 {
 	Session *session = SESSION(data);
 	guint write_data_len;
 	gint ret;
 
 	cm_return_val_if_fail(condition == G_IO_OUT, FALSE);
 	cm_return_val_if_fail(session->write_data != NULL, FALSE);
 	cm_return_val_if_fail(session->write_data_p != NULL, FALSE);
 	cm_return_val_if_fail(session->write_data_len > 0, FALSE);
 
 	write_data_len = session->write_data_len;
 
 	ret = session_write_data(session);
 
 	if (ret < 0) {
 		session->state = SESSION_ERROR;
 		return FALSE;
 	} else if (ret > 0) {
                 GDateTime *tv_cur = g_date_time_new_now_local();
 
                 GTimeSpan ts = g_date_time_difference(tv_cur, session->tv_prev);
                 if (1000 - ts < 0 || ts > UI_REFRESH_INTERVAL) {
                         session_set_timeout(session, session->timeout_interval);
                         session->send_data_progressive_notify
                                 (session,
                                  session->write_data_p - session->write_data,
                                  write_data_len,
                                  session->send_data_progressive_notify_data);
 			g_date_time_unref(session->tv_prev);
                         session->tv_prev = g_date_time_new_now_local();
                 }
                 g_date_time_unref(tv_cur);
 		return TRUE;
 	}
 
 	if (session->io_tag > 0) {
 		g_source_remove(session->io_tag);
 		session->io_tag = 0;
 	}
 
 	/* callback */
 	ret = session->send_data_finished(session, write_data_len);
 	session->send_data_notify(session, write_data_len,
 				  session->send_data_notify_data);
 
 	return FALSE;
 }
 
 void session_register_ping(Session *session, gboolean (*ping_cb)(gpointer data))
 {
 	if (!session)
 		return;
 	if (session->ping_tag > -1)
 		g_source_remove(session->ping_tag);
 
 	session->ping_tag = -1;
 
 	if (ping_cb != NULL)
 		session->ping_tag = g_timeout_add_seconds(60, ping_cb, session);
 }