Initial import of Sylpheed (GTK2 version).

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@1 ee746299-78ed-0310-b773-934348b2243d

1 files changed, 862 insertions, 0 deletions

diff --git a/src/pop.c b/src/pop.c
new file mode 100644
index 00000000..483a076f
--- /dev/null
+++ b/src/pop.c
@@ -0,0 +1,862 @@
+/*
+ * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 1999-2004 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 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 Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <glib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+
+#include "intl.h"
+#include "pop.h"
+#include "md5.h"
+#include "prefs_account.h"
+#include "utils.h"
+#include "recv.h"
+
+static gint pop3_greeting_recv		(Pop3Session *session,
+					 const gchar *msg);
+static gint pop3_getauth_user_send	(Pop3Session *session);
+static gint pop3_getauth_pass_send	(Pop3Session *session);
+static gint pop3_getauth_apop_send	(Pop3Session *session);
+#if USE_SSL
+static gint pop3_stls_send		(Pop3Session *session);
+static gint pop3_stls_recv		(Pop3Session *session);
+#endif
+static gint pop3_getrange_stat_send	(Pop3Session *session);
+static gint pop3_getrange_stat_recv	(Pop3Session *session,
+					 const gchar *msg);
+static gint pop3_getrange_last_send	(Pop3Session *session);
+static gint pop3_getrange_last_recv	(Pop3Session *session,
+					 const gchar *msg);
+static gint pop3_getrange_uidl_send	(Pop3Session *session);
+static gint pop3_getrange_uidl_recv	(Pop3Session *session,
+					 const gchar *data,
+					 guint        len);
+static gint pop3_getsize_list_send	(Pop3Session *session);
+static gint pop3_getsize_list_recv	(Pop3Session *session,
+					 const gchar *data,
+					 guint        len);
+static gint pop3_retr_send		(Pop3Session *session);
+static gint pop3_retr_recv		(Pop3Session *session,
+					 const gchar *data,
+					 guint        len);
+static gint pop3_delete_send		(Pop3Session *session);
+static gint pop3_delete_recv		(Pop3Session *session);
+static gint pop3_logout_send		(Pop3Session *session);
+
+static void pop3_gen_send		(Pop3Session	*session,
+					 const gchar	*format, ...);
+
+static void pop3_session_destroy	(Session	*session);
+
+static gint pop3_write_msg_to_file	(const gchar	*file,
+					 const gchar	*data,
+					 guint		 len);
+
+static Pop3State pop3_lookup_next	(Pop3Session	*session);
+static Pop3ErrorValue pop3_ok		(Pop3Session	*session,
+					 const gchar	*msg);
+
+static gint pop3_session_recv_msg		(Session	*session,
+						 const gchar	*msg);
+static gint pop3_session_recv_data_finished	(Session	*session,
+						 guchar		*data,
+						 guint		 len);
+
+
+static gint pop3_greeting_recv(Pop3Session *session, const gchar *msg)
+{
+	session->state = POP3_GREETING;
+
+	session->greeting = g_strdup(msg);
+	return PS_SUCCESS;
+}
+
+#if USE_SSL
+static gint pop3_stls_send(Pop3Session *session)
+{
+	session->state = POP3_STLS;
+	pop3_gen_send(session, "STLS");
+	return PS_SUCCESS;
+}
+
+static gint pop3_stls_recv(Pop3Session *session)
+{
+	if (session_start_tls(SESSION(session)) < 0) {
+		session->error_val = PS_SOCKET;
+		return -1;
+	}
+	return PS_SUCCESS;
+}
+#endif /* USE_SSL */
+
+static gint pop3_getauth_user_send(Pop3Session *session)
+{
+	g_return_val_if_fail(session->user != NULL, -1);
+
+	session->state = POP3_GETAUTH_USER;
+	pop3_gen_send(session, "USER %s", session->user);
+	return PS_SUCCESS;
+}
+
+static gint pop3_getauth_pass_send(Pop3Session *session)
+{
+	g_return_val_if_fail(session->pass != NULL, -1);
+
+	session->state = POP3_GETAUTH_PASS;
+	pop3_gen_send(session, "PASS %s", session->pass);
+	return PS_SUCCESS;
+}
+
+static gint pop3_getauth_apop_send(Pop3Session *session)
+{
+	gchar *start, *end;
+	gchar *apop_str;
+	gchar md5sum[33];
+
+	g_return_val_if_fail(session->user != NULL, -1);
+	g_return_val_if_fail(session->pass != NULL, -1);
+
+	session->state = POP3_GETAUTH_APOP;
+
+	if ((start = strchr(session->greeting, '<')) == NULL) {
+		log_warning(_("Required APOP timestamp not found "
+			      "in greeting\n"));
+		session->error_val = PS_PROTOCOL;
+		return -1;
+	}
+
+	if ((end = strchr(start, '>')) == NULL || end == start + 1) {
+		log_warning(_("Timestamp syntax error in greeting\n"));
+		session->error_val = PS_PROTOCOL;
+		return -1;
+	}
+
+	*(end + 1) = '\0';
+
+	apop_str = g_strconcat(start, session->pass, NULL);
+	md5_hex_digest(md5sum, apop_str);
+	g_free(apop_str);
+
+	pop3_gen_send(session, "APOP %s %s", session->user, md5sum);
+
+	return PS_SUCCESS;
+}
+
+static gint pop3_getrange_stat_send(Pop3Session *session)
+{
+	session->state = POP3_GETRANGE_STAT;
+	pop3_gen_send(session, "STAT");
+	return PS_SUCCESS;
+}
+
+static gint pop3_getrange_stat_recv(Pop3Session *session, const gchar *msg)
+{
+	if (sscanf(msg, "%d %d", &session->count, &session->total_bytes) != 2) {
+		log_warning(_("POP3 protocol error\n"));
+		session->error_val = PS_PROTOCOL;
+		return -1;
+	} else {
+		if (session->count == 0) {
+			session->uidl_is_valid = TRUE;
+		} else {
+			session->msg = g_new0(Pop3MsgInfo, session->count + 1);
+			session->cur_msg = 1;
+		}
+	}
+
+	return PS_SUCCESS;
+}
+
+static gint pop3_getrange_last_send(Pop3Session *session)
+{
+	session->state = POP3_GETRANGE_LAST;
+	pop3_gen_send(session, "LAST");
+	return PS_SUCCESS;
+}
+
+static gint pop3_getrange_last_recv(Pop3Session *session, const gchar *msg)
+{
+	gint last;
+
+	if (sscanf(msg, "%d", &last) == 0) {
+		log_warning(_("POP3 protocol error\n"));
+		session->error_val = PS_PROTOCOL;
+		return -1;
+	} else {
+		if (session->count > last) {
+			session->new_msg_exist = TRUE;
+			session->cur_msg = last + 1;
+		} else
+			session->cur_msg = 0;
+	}
+
+	return PS_SUCCESS;
+}
+
+static gint pop3_getrange_uidl_send(Pop3Session *session)
+{
+	session->state = POP3_GETRANGE_UIDL;
+	pop3_gen_send(session, "UIDL");
+	return PS_SUCCESS;
+}
+
+static gint pop3_getrange_uidl_recv(Pop3Session *session, const gchar *data,
+				    guint len)
+{
+	gchar id[IDLEN + 1];
+	gchar buf[POPBUFSIZE];
+	gint buf_len;
+	gint num;
+	time_t recv_time;
+	const gchar *p = data;
+	const gchar *lastp = data + len;
+	const gchar *newline;
+
+	while (p < lastp) {
+		if ((newline = memchr(p, '\r', lastp - p)) == NULL)
+			return -1;
+		buf_len = MIN(newline - p, sizeof(buf) - 1);
+		memcpy(buf, p, buf_len);
+		buf[buf_len] = '\0';
+
+		p = newline + 1;
+		if (p < lastp && *p == '\n') p++;
+
+		if (sscanf(buf, "%d %" Xstr(IDLEN) "s", &num, id) != 2 ||
+		    num <= 0 || num > session->count) {
+			log_warning(_("invalid UIDL response: %s\n"), buf);
+			continue;
+		}
+
+		session->msg[num].uidl = g_strdup(id);
+
+		recv_time = (time_t)g_hash_table_lookup(session->uidl_table, id);
+		session->msg[num].recv_time = recv_time;
+
+		if (!session->ac_prefs->getall && recv_time != RECV_TIME_NONE)
+			session->msg[num].received = TRUE;
+
+		if (!session->new_msg_exist &&
+		    (session->ac_prefs->getall || recv_time == RECV_TIME_NONE ||
+		     session->ac_prefs->rmmail)) {
+			session->cur_msg = num;
+			session->new_msg_exist = TRUE;
+		}
+	}
+
+	session->uidl_is_valid = TRUE;
+	return PS_SUCCESS;
+}
+
+static gint pop3_getsize_list_send(Pop3Session *session)
+{
+	session->state = POP3_GETSIZE_LIST;
+	pop3_gen_send(session, "LIST");
+	return PS_SUCCESS;
+}
+
+static gint pop3_getsize_list_recv(Pop3Session *session, const gchar *data,
+				   guint len)
+{
+	gchar buf[POPBUFSIZE];
+	gint buf_len;
+	guint num, size;
+	const gchar *p = data;
+	const gchar *lastp = data + len;
+	const gchar *newline;
+
+	while (p < lastp) {
+		if ((newline = memchr(p, '\r', lastp - p)) == NULL)
+			return -1;
+		buf_len = MIN(newline - p, sizeof(buf) - 1);
+		memcpy(buf, p, buf_len);
+		buf[buf_len] = '\0';
+
+		p = newline + 1;
+		if (p < lastp && *p == '\n') p++;
+
+		if (sscanf(buf, "%u %u", &num, &size) != 2) {
+			session->error_val = PS_PROTOCOL;
+			return -1;
+		}
+
+		if (num > 0 && num <= session->count)
+			session->msg[num].size = size;
+		if (num > 0 && num < session->cur_msg)
+			session->cur_total_bytes += size;
+	}
+
+	return PS_SUCCESS;
+}
+
+static gint pop3_retr_send(Pop3Session *session)
+{
+	session->state = POP3_RETR;
+	pop3_gen_send(session, "RETR %d", session->cur_msg);
+	return PS_SUCCESS;
+}
+
+static gint pop3_retr_recv(Pop3Session *session, const gchar *data, guint len)
+{
+	gchar *file;
+	gint drop_ok;
+
+	file = get_tmp_file();
+	if (pop3_write_msg_to_file(file, data, len) < 0) {
+		g_free(file);
+		session->error_val = PS_IOERR;
+		return -1;
+	}
+
+	drop_ok = session->drop_message(session, file);
+	unlink(file);
+	g_free(file);
+	if (drop_ok < 0) {
+		session->error_val = PS_IOERR;
+		return -1;
+	}
+
+	session->cur_total_bytes += session->msg[session->cur_msg].size;
+	session->cur_total_recv_bytes += session->msg[session->cur_msg].size;
+	session->cur_total_num++;
+
+	session->msg[session->cur_msg].received = TRUE;
+	session->msg[session->cur_msg].recv_time =
+		drop_ok == DROP_DONT_RECEIVE ? RECV_TIME_KEEP
+			: drop_ok == DROP_DELETE ? RECV_TIME_DELETE
+			: session->current_time;
+
+	return PS_SUCCESS;
+}
+
+static gint pop3_delete_send(Pop3Session *session)
+{
+	session->state = POP3_DELETE;
+	pop3_gen_send(session, "DELE %d", session->cur_msg);
+	return PS_SUCCESS;
+}
+
+static gint pop3_delete_recv(Pop3Session *session)
+{
+	session->msg[session->cur_msg].deleted = TRUE;
+	return PS_SUCCESS;
+}
+
+static gint pop3_logout_send(Pop3Session *session)
+{
+	session->state = POP3_LOGOUT;
+	pop3_gen_send(session, "QUIT");
+	return PS_SUCCESS;
+}
+
+static void pop3_gen_send(Pop3Session *session, const gchar *format, ...)
+{
+	gchar buf[POPBUFSIZE + 1];
+	va_list args;
+
+	va_start(args, format);
+	g_vsnprintf(buf, sizeof(buf) - 2, format, args);
+	va_end(args);
+
+	if (!strncasecmp(buf, "PASS ", 5))
+		log_print("POP3> PASS ********\n");
+	else
+		log_print("POP3> %s\n", buf);
+
+	session_send_msg(SESSION(session), SESSION_MSG_NORMAL, buf);
+}
+
+Session *pop3_session_new(PrefsAccount *account)
+{
+	Pop3Session *session;
+
+	g_return_val_if_fail(account != NULL, NULL);
+
+	session = g_new0(Pop3Session, 1);
+
+	session_init(SESSION(session));
+
+	SESSION(session)->type = SESSION_POP3;
+
+	SESSION(session)->recv_msg = pop3_session_recv_msg;
+	SESSION(session)->recv_data_finished = pop3_session_recv_data_finished;
+	SESSION(session)->send_data_finished = NULL;
+
+	SESSION(session)->destroy = pop3_session_destroy;
+
+	session->state = POP3_READY;
+	session->ac_prefs = account;
+	session->uidl_table = pop3_get_uidl_table(account);
+	session->current_time = time(NULL);
+	session->error_val = PS_SUCCESS;
+	session->error_msg = NULL;
+
+	return SESSION(session);
+}
+
+static void pop3_session_destroy(Session *session)
+{
+	Pop3Session *pop3_session = POP3_SESSION(session);
+	gint n;
+
+	g_return_if_fail(session != NULL);
+
+	for (n = 1; n <= pop3_session->count; n++)
+		g_free(pop3_session->msg[n].uidl);
+	g_free(pop3_session->msg);
+
+	if (pop3_session->uidl_table) {
+		hash_free_strings(pop3_session->uidl_table);
+		g_hash_table_destroy(pop3_session->uidl_table);
+	}
+
+	g_free(pop3_session->greeting);
+	g_free(pop3_session->user);
+	g_free(pop3_session->pass);
+	g_free(pop3_session->error_msg);
+}
+
+GHashTable *pop3_get_uidl_table(PrefsAccount *ac_prefs)
+{
+	GHashTable *table;
+	gchar *path;
+	FILE *fp;
+	gchar buf[POPBUFSIZE];
+	gchar uidl[POPBUFSIZE];
+	time_t recv_time;
+	time_t now;
+
+	table = g_hash_table_new(g_str_hash, g_str_equal);
+
+	path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
+			   "uidl", G_DIR_SEPARATOR_S, ac_prefs->recv_server,
+			   "-", ac_prefs->userid, NULL);
+	if ((fp = fopen(path, "rb")) == NULL) {
+		if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
+		g_free(path);
+		path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
+				   "uidl-", ac_prefs->recv_server,
+				   "-", ac_prefs->userid, NULL);
+		if ((fp = fopen(path, "rb")) == NULL) {
+			if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
+			g_free(path);
+			return table;
+		}
+	}
+	g_free(path);
+
+	now = time(NULL);
+
+	while (fgets(buf, sizeof(buf), fp) != NULL) {
+		strretchomp(buf);
+		recv_time = RECV_TIME_NONE;
+		if (sscanf(buf, "%s\t%ld", uidl, &recv_time) != 2) {
+			if (sscanf(buf, "%s", uidl) != 1)
+				continue;
+			else
+				recv_time = now;
+		}
+		if (recv_time == RECV_TIME_NONE)
+			recv_time = RECV_TIME_RECEIVED;
+		g_hash_table_insert(table, g_strdup(uidl),
+				    GINT_TO_POINTER(recv_time));
+	}
+
+	fclose(fp);
+	return table;
+}
+
+gint pop3_write_uidl_list(Pop3Session *session)
+{
+	gchar *path;
+	FILE *fp;
+	Pop3MsgInfo *msg;
+	gint n;
+
+	if (!session->uidl_is_valid) return 0;
+
+	path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
+			   "uidl", G_DIR_SEPARATOR_S,
+			   session->ac_prefs->recv_server,
+			   "-", session->ac_prefs->userid, NULL);
+	if ((fp = fopen(path, "wb")) == NULL) {
+		FILE_OP_ERROR(path, "fopen");
+		g_free(path);
+		return -1;
+	}
+
+	for (n = 1; n <= session->count; n++) {
+		msg = &session->msg[n];
+		if (msg->uidl && msg->received && !msg->deleted)
+			fprintf(fp, "%s\t%ld\n", msg->uidl, msg->recv_time);
+	}
+
+	if (fclose(fp) == EOF) FILE_OP_ERROR(path, "fclose");
+	g_free(path);
+
+	return 0;
+}
+
+static gint pop3_write_msg_to_file(const gchar *file, const gchar *data,
+				   guint len)
+{
+	FILE *fp;
+	const gchar *prev, *cur;
+
+	g_return_val_if_fail(file != NULL, -1);
+
+	if ((fp = fopen(file, "wb")) == NULL) {
+		FILE_OP_ERROR(file, "fopen");
+		return -1;
+	}
+
+	if (change_file_mode_rw(fp, file) < 0)
+		FILE_OP_ERROR(file, "chmod");
+
+	/* +------------------+----------------+--------------------------+ *
+	 * ^data              ^prev            ^cur             data+len-1^ */
+
+	prev = data;
+	while ((cur = (gchar *)my_memmem(prev, len - (prev - data), "\r\n", 2))
+	       != NULL) {
+		if ((cur > prev && fwrite(prev, cur - prev, 1, fp) < 1) ||
+		    fputc('\n', fp) == EOF) {
+			FILE_OP_ERROR(file, "fwrite");
+			g_warning("can't write to file: %s\n", file);
+			fclose(fp);
+			unlink(file);
+			return -1;
+		}
+
+		if (cur == data + len - 1) {
+			prev = cur + 1;
+			break;
+		}
+
+		if (*(cur + 1) == '\n')
+			prev = cur + 2;
+		else
+			prev = cur + 1;
+
+		if (prev - data < len - 1 && *prev == '.' && *(prev + 1) == '.')
+			prev++;
+
+		if (prev - data >= len)
+			break;
+	}
+
+	if (prev - data < len &&
+	    fwrite(prev, len - (prev - data), 1, fp) < 1) {
+		FILE_OP_ERROR(file, "fwrite");
+		g_warning("can't write to file: %s\n", file);
+		fclose(fp);
+		unlink(file);
+		return -1;
+	}
+	if (data[len - 1] != '\r' && data[len - 1] != '\n') {
+		if (fputc('\n', fp) == EOF) {
+			FILE_OP_ERROR(file, "fputc");
+			g_warning("can't write to file: %s\n", file);
+			fclose(fp);
+			unlink(file);
+			return -1;
+		}
+	}
+
+	if (fclose(fp) == EOF) {
+		FILE_OP_ERROR(file, "fclose");
+		unlink(file);
+		return -1;
+	}
+
+	return 0;
+}
+
+static Pop3State pop3_lookup_next(Pop3Session *session)
+{
+	Pop3MsgInfo *msg;
+	PrefsAccount *ac = session->ac_prefs;
+	gint size;
+	gboolean size_limit_over;
+
+	for (;;) {
+		msg = &session->msg[session->cur_msg];
+		size = msg->size;
+		size_limit_over =
+		    (ac->enable_size_limit &&
+		     ac->size_limit > 0 &&
+		     size > ac->size_limit * 1024);
+
+		if (msg->recv_time == RECV_TIME_DELETE ||
+		    (ac->rmmail &&
+		     msg->recv_time != RECV_TIME_NONE &&
+		     msg->recv_time != RECV_TIME_KEEP &&
+		     session->current_time - msg->recv_time >=
+		     ac->msg_leave_time * 24 * 60 * 60)) {
+			log_print(_("POP3: Deleting expired message %d\n"),
+				  session->cur_msg);
+			pop3_delete_send(session);
+			return POP3_DELETE;
+		}
+
+		if (size_limit_over)
+			log_print
+				(_("POP3: Skipping message %d (%d bytes)\n"),
+				  session->cur_msg, size);
+
+		if (size == 0 || msg->received || size_limit_over) {
+			session->cur_total_bytes += size;
+			if (session->cur_msg == session->count) {
+				pop3_logout_send(session);
+				return POP3_LOGOUT;
+			} else
+				session->cur_msg++;
+		} else
+			break;
+	}
+
+	pop3_retr_send(session);
+	return POP3_RETR;
+}
+
+static Pop3ErrorValue pop3_ok(Pop3Session *session, const gchar *msg)
+{
+	Pop3ErrorValue ok;
+
+	log_print("POP3< %s\n", msg);
+
+	if (!strncmp(msg, "+OK", 3))
+		ok = PS_SUCCESS;
+	else if (!strncmp(msg, "-ERR", 4)) {
+		if (strstr(msg + 4, "lock") ||
+		    strstr(msg + 4, "Lock") ||
+		    strstr(msg + 4, "LOCK") ||
+		    strstr(msg + 4, "wait")) {
+			log_warning(_("mailbox is locked\n"));
+			ok = PS_LOCKBUSY;
+		} else if (strcasestr(msg + 4, "timeout")) {
+			log_warning(_("session timeout\n"));
+			ok = PS_ERROR;
+		} else {
+			switch (session->state) {
+#if USE_SSL
+			case POP3_STLS:
+				log_warning(_("can't start TLS session\n"));
+				ok = PS_ERROR;
+				break;
+#endif
+			case POP3_GETAUTH_USER:
+			case POP3_GETAUTH_PASS:
+			case POP3_GETAUTH_APOP:
+				log_warning(_("error occurred on authentication\n"));
+				ok = PS_AUTHFAIL;
+				break;
+			case POP3_GETRANGE_LAST:
+			case POP3_GETRANGE_UIDL:
+				log_warning(_("command not supported\n"));
+				ok = PS_NOTSUPPORTED;
+				break;
+			default:
+				log_warning(_("error occurred on POP3 session\n"));
+				ok = PS_ERROR;
+			}
+		}
+
+		g_free(session->error_msg);
+		session->error_msg = g_strdup(msg);
+		fprintf(stderr, "POP3: %s\n", msg);
+	} else
+		ok = PS_PROTOCOL;
+
+	session->error_val = ok;
+	return ok;
+}
+
+static gint pop3_session_recv_msg(Session *session, const gchar *msg)
+{
+	Pop3Session *pop3_session = POP3_SESSION(session);
+	Pop3ErrorValue val = PS_SUCCESS;
+	const guchar *body;
+
+	body = msg;
+	if (pop3_session->state != POP3_GETRANGE_UIDL_RECV &&
+	    pop3_session->state != POP3_GETSIZE_LIST_RECV) {
+		val = pop3_ok(pop3_session, msg);
+		if (val != PS_SUCCESS) {
+			if (val != PS_NOTSUPPORTED) {
+				pop3_session->state = POP3_ERROR;
+				return -1;
+			}
+		}
+
+		if (*body == '+' || *body == '-')
+			body++;
+		while (isalpha(*body))
+			body++;
+		while (isspace(*body))
+			body++;
+	}
+
+	switch (pop3_session->state) {
+	case POP3_READY:
+	case POP3_GREETING:
+		pop3_greeting_recv(pop3_session, body);
+#if USE_SSL
+		if (pop3_session->ac_prefs->ssl_pop == SSL_STARTTLS)
+			pop3_stls_send(pop3_session);
+		else
+#endif
+		if (pop3_session->ac_prefs->use_apop_auth)
+			pop3_getauth_apop_send(pop3_session);
+		else
+			pop3_getauth_user_send(pop3_session);
+		break;
+#if USE_SSL
+	case POP3_STLS:
+		if (pop3_stls_recv(pop3_session) != PS_SUCCESS)
+			return -1;
+		if (pop3_session->ac_prefs->use_apop_auth)
+			pop3_getauth_apop_send(pop3_session);
+		else
+			pop3_getauth_user_send(pop3_session);
+		break;
+#endif
+	case POP3_GETAUTH_USER:
+		pop3_getauth_pass_send(pop3_session);
+		break;
+	case POP3_GETAUTH_PASS:
+	case POP3_GETAUTH_APOP:
+		pop3_getrange_stat_send(pop3_session);
+		break;
+	case POP3_GETRANGE_STAT:
+		if (pop3_getrange_stat_recv(pop3_session, body) < 0)
+			return -1;
+		if (pop3_session->count > 0)
+			pop3_getrange_uidl_send(pop3_session);
+		else
+			pop3_logout_send(pop3_session);
+		break;
+	case POP3_GETRANGE_LAST:
+		if (val == PS_NOTSUPPORTED)
+			pop3_session->error_val = PS_SUCCESS;
+		else if (pop3_getrange_last_recv(pop3_session, body) < 0)
+			return -1;
+		if (pop3_session->cur_msg > 0)
+			pop3_getsize_list_send(pop3_session);
+		else
+			pop3_logout_send(pop3_session);
+		break;
+	case POP3_GETRANGE_UIDL:
+		if (val == PS_NOTSUPPORTED) {
+			pop3_session->error_val = PS_SUCCESS;
+			pop3_getrange_last_send(pop3_session);
+		} else {
+			pop3_session->state = POP3_GETRANGE_UIDL_RECV;
+			session_recv_data(session, 0, ".\r\n");
+		}
+		break;
+	case POP3_GETSIZE_LIST:
+		pop3_session->state = POP3_GETSIZE_LIST_RECV;
+		session_recv_data(session, 0, ".\r\n");
+		break;
+	case POP3_RETR:
+		pop3_session->state = POP3_RETR_RECV;
+		session_recv_data(session, 0, ".\r\n");
+		break;
+	case POP3_DELETE:
+		pop3_delete_recv(pop3_session);
+		if (pop3_session->cur_msg == pop3_session->count)
+			pop3_logout_send(pop3_session);
+		else {
+			pop3_session->cur_msg++;
+			if (pop3_lookup_next(pop3_session) == POP3_ERROR)
+				return -1;
+		}
+		break;
+	case POP3_LOGOUT:
+		session_disconnect(session);
+		break;
+	case POP3_ERROR:
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static gint pop3_session_recv_data_finished(Session *session, guchar *data,
+					    guint len)
+{
+	Pop3Session *pop3_session = POP3_SESSION(session);
+	Pop3ErrorValue val = PS_SUCCESS;
+
+	switch (pop3_session->state) {
+	case POP3_GETRANGE_UIDL_RECV:
+		val = pop3_getrange_uidl_recv(pop3_session, data, len);
+		if (val == PS_SUCCESS) {
+			if (pop3_session->new_msg_exist)
+				pop3_getsize_list_send(pop3_session);
+			else
+				pop3_logout_send(pop3_session);
+		} else
+			return -1;
+		break;
+	case POP3_GETSIZE_LIST_RECV:
+		val = pop3_getsize_list_recv(pop3_session, data, len);
+		if (val == PS_SUCCESS) {
+			if (pop3_lookup_next(pop3_session) == POP3_ERROR)
+				return -1;
+		} else
+			return -1;
+		break;
+	case POP3_RETR_RECV:
+		if (pop3_retr_recv(pop3_session, data, len) < 0)
+			return -1;
+
+		if (pop3_session->msg[pop3_session->cur_msg].recv_time
+		    == RECV_TIME_DELETE ||
+		    (pop3_session->ac_prefs->rmmail &&
+		     pop3_session->ac_prefs->msg_leave_time == 0 &&
+		     pop3_session->msg[pop3_session->cur_msg].recv_time
+		     != RECV_TIME_KEEP))
+			pop3_delete_send(pop3_session);
+		else if (pop3_session->cur_msg == pop3_session->count)
+			pop3_logout_send(pop3_session);
+		else {
+			pop3_session->cur_msg++;
+			if (pop3_lookup_next(pop3_session) == POP3_ERROR)
+				return -1;
+		}
+		break;
+	case POP3_ERROR:
+	default:
+		return -1;
+	}
+
+	return 0;
+}