Initial import of Sylpheed (GTK2 version).

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

1 files changed, 1293 insertions, 0 deletions

diff --git a/src/socket.c b/src/socket.c
new file mode 100644
index 00000000..71810d20
--- /dev/null
+++ b/src/socket.c
@@ -0,0 +1,1293 @@
+/*
+ * 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 <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <signal.h>
+#include <setjmp.h>
+#if HAVE_SYS_SELECT_H
+#  include <sys/select.h>
+#endif
+
+#include "socket.h"
+#if USE_SSL
+#  include "ssl.h"
+#endif
+
+#define BUFFSIZE	8192
+
+typedef gint (*SockAddrFunc)	(GList		*addr_list,
+				 gpointer	 data);
+
+typedef struct _SockConnectData	SockConnectData;
+typedef struct _SockLookupData	SockLookupData;
+typedef struct _SockAddrData	SockAddrData;
+typedef struct _SockSource	SockSource;
+
+struct _SockConnectData {
+	gint id;
+	gchar *hostname;
+	gushort port;
+	GList *addr_list;
+	GList *cur_addr;
+	SockLookupData *lookup_data;
+	GIOChannel *channel;
+	guint io_tag;
+	SockConnectFunc func;
+	gpointer data;
+};
+
+struct _SockLookupData {
+	gchar *hostname;
+	pid_t child_pid;
+	GIOChannel *channel;
+	guint io_tag;
+	SockAddrFunc func;
+	gpointer data;
+};
+
+struct _SockAddrData {
+	gint family;
+	gint socktype;
+	gint protocol;
+	gint addr_len;
+	struct sockaddr *addr;
+};
+
+struct _SockSource {
+	GSource parent;
+	SockInfo *sock;
+};
+
+static guint io_timeout = 60;
+
+static GList *sock_connect_data_list = NULL;
+
+static gboolean sock_prepare		(GSource	*source,
+					 gint		*timeout);
+static gboolean sock_check		(GSource	*source);
+static gboolean sock_dispatch		(GSource	*source,
+					 GSourceFunc	 callback,
+					 gpointer	 user_data);
+
+GSourceFuncs sock_watch_funcs = {
+	sock_prepare,
+	sock_check,
+	sock_dispatch,
+	NULL
+};
+
+static gint sock_connect_with_timeout	(gint			 sock,
+					 const struct sockaddr	*serv_addr,
+					 gint			 addrlen,
+					 guint			 timeout_secs);
+
+#ifndef INET6
+static gint sock_connect_by_hostname	(gint		 sock,
+					 const gchar	*hostname,
+					 gushort	 port);
+#else
+static gint sock_connect_by_getaddrinfo	(const gchar	*hostname,
+					 gushort	 port);
+#endif
+
+static void sock_address_list_free		(GList		*addr_list);
+
+static gboolean sock_connect_async_cb		(GIOChannel	*source,
+						 GIOCondition	 condition,
+						 gpointer	 data);
+static gint sock_connect_async_get_address_info_cb
+						(GList		*addr_list,
+						 gpointer	 data);
+
+static gint sock_connect_address_list_async	(SockConnectData *conn_data);
+
+static gboolean sock_get_address_info_async_cb	(GIOChannel	*source,
+						 GIOCondition	 condition,
+						 gpointer	 data);
+static SockLookupData *sock_get_address_info_async
+						(const gchar	*hostname,
+						 gushort	 port,
+						 SockAddrFunc	 func,
+						 gpointer	 data);
+static gint sock_get_address_info_async_cancel	(SockLookupData	*lookup_data);
+
+
+gint sock_set_io_timeout(guint sec)
+{
+	io_timeout = sec;
+	return 0;
+}
+
+gint fd_connect_unix(const gchar *path)
+{
+	gint sock;
+	struct sockaddr_un addr;
+
+	sock = socket(PF_UNIX, SOCK_STREAM, 0);
+	if (sock < 0) {
+		perror("sock_connect_unix(): socket");
+		return -1;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sun_family = AF_UNIX;
+	strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
+
+	if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+		close(sock);
+		return -1;
+	}
+
+	return sock;
+}
+
+gint fd_open_unix(const gchar *path)
+{
+	gint sock;
+	struct sockaddr_un addr;
+
+	sock = socket(PF_UNIX, SOCK_STREAM, 0);
+
+	if (sock < 0) {
+		perror("sock_open_unix(): socket");
+		return -1;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sun_family = AF_UNIX;
+	strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
+
+	if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+		perror("bind");
+		close(sock);
+		return -1;
+	}
+
+	if (listen(sock, 1) < 0) {
+		perror("listen");
+		close(sock);
+		return -1;		
+	}
+
+	return sock;
+}
+
+gint fd_accept(gint sock)
+{
+	struct sockaddr_in caddr;
+	gint caddr_len;
+
+	caddr_len = sizeof(caddr);
+	return accept(sock, (struct sockaddr *)&caddr, &caddr_len);
+}
+
+
+static gint set_nonblocking_mode(gint fd, gboolean nonblock)
+{
+	gint flags;
+
+	flags = fcntl(fd, F_GETFL, 0);
+	if (flags < 0) {
+		perror("fcntl");
+		return -1;
+	}
+
+	if (nonblock)
+		flags |= O_NONBLOCK;
+	else
+		flags &= ~O_NONBLOCK;
+
+	return fcntl(fd, F_SETFL, flags);
+}
+
+gint sock_set_nonblocking_mode(SockInfo *sock, gboolean nonblock)
+{
+	g_return_val_if_fail(sock != NULL, -1);
+
+	return set_nonblocking_mode(sock->sock, nonblock);
+}
+
+static gboolean is_nonblocking_mode(gint fd)
+{
+	gint flags;
+
+	flags = fcntl(fd, F_GETFL, 0);
+	if (flags < 0) {
+		perror("fcntl");
+		return FALSE;
+	}
+
+	return ((flags & O_NONBLOCK) != 0);
+}
+
+gboolean sock_is_nonblocking_mode(SockInfo *sock)
+{
+	g_return_val_if_fail(sock != NULL, FALSE);
+
+	return is_nonblocking_mode(sock->sock);
+}
+
+
+static gboolean sock_prepare(GSource *source, gint *timeout)
+{
+	*timeout = 1;
+	return FALSE;
+}
+
+static gboolean sock_check(GSource *source)
+{
+	SockInfo *sock = ((SockSource *)source)->sock;
+	struct timeval timeout = {0, 0};
+	fd_set fds;
+	GIOCondition condition = sock->condition;
+
+#if USE_SSL
+	if (sock->ssl) {
+		if (condition & G_IO_IN) {
+			if (SSL_pending(sock->ssl) > 0)
+				return TRUE;
+			if (SSL_want_write(sock->ssl))
+				condition |= G_IO_OUT;
+		}
+
+		if (condition & G_IO_OUT) {
+			if (SSL_want_read(sock->ssl))
+				condition |= G_IO_IN;
+		}
+	}
+#endif
+
+	FD_ZERO(&fds);
+	FD_SET(sock->sock, &fds);
+
+	select(sock->sock + 1,
+	       (condition & G_IO_IN)  ? &fds : NULL,
+	       (condition & G_IO_OUT) ? &fds : NULL,
+	       NULL, &timeout);
+
+	return FD_ISSET(sock->sock, &fds) != 0;
+}
+
+static gboolean sock_dispatch(GSource *source, GSourceFunc callback,
+			      gpointer user_data)
+{
+	SockInfo *sock = ((SockSource *)source)->sock;
+
+	return sock->callback(sock, sock->condition, sock->data);
+}
+
+static gboolean sock_watch_cb(GIOChannel *source, GIOCondition condition,
+			      gpointer data)
+{
+	SockInfo *sock = (SockInfo *)data;
+
+	return sock->callback(sock, condition, sock->data);
+}
+
+guint sock_add_watch(SockInfo *sock, GIOCondition condition, SockFunc func,
+		     gpointer data)
+{
+	sock->callback = func;
+	sock->condition = condition;
+	sock->data = data;
+
+#if USE_SSL
+	if (sock->ssl) {
+		GSource *source;
+
+		source = g_source_new(&sock_watch_funcs, sizeof(SockSource));
+		((SockSource *)source)->sock = sock;
+		g_source_set_priority(source, G_PRIORITY_DEFAULT);
+		g_source_set_can_recurse(source, FALSE);
+		g_source_attach(source, NULL);
+	}
+#endif
+
+	return g_io_add_watch(sock->sock_ch, condition, sock_watch_cb, sock);
+}
+
+static gint fd_check_io(gint fd, GIOCondition cond)
+{
+	struct timeval timeout;
+	fd_set fds;
+
+	if (is_nonblocking_mode(fd))
+		return 0;
+
+	timeout.tv_sec  = io_timeout;
+	timeout.tv_usec = 0;
+
+	FD_ZERO(&fds);
+	FD_SET(fd, &fds);
+
+	if (cond == G_IO_IN) {
+		select(fd + 1, &fds, NULL, NULL,
+		       io_timeout > 0 ? &timeout : NULL);
+	} else {
+		select(fd + 1, NULL, &fds, NULL,
+		       io_timeout > 0 ? &timeout : NULL);
+	}
+
+	if (FD_ISSET(fd, &fds)) {
+		return 0;
+	} else {
+		g_warning("Socket IO timeout\n");
+		return -1;
+	}
+}
+
+static sigjmp_buf jmpenv;
+
+static void timeout_handler(gint sig)
+{
+	siglongjmp(jmpenv, 1);
+}
+
+static gint sock_connect_with_timeout(gint sock,
+				      const struct sockaddr *serv_addr,
+				      gint addrlen,
+				      guint timeout_secs)
+{
+	gint ret;
+	void (*prev_handler)(gint);
+
+	alarm(0);
+	prev_handler = signal(SIGALRM, timeout_handler);
+	if (sigsetjmp(jmpenv, 1)) {
+		alarm(0);
+		signal(SIGALRM, prev_handler);
+		errno = ETIMEDOUT;
+		return -1;
+	}
+	alarm(timeout_secs);
+
+	ret = connect(sock, serv_addr, addrlen);
+
+	alarm(0);
+	signal(SIGALRM, prev_handler);
+
+	return ret;
+}
+
+struct hostent *my_gethostbyname(const gchar *hostname)
+{
+	struct hostent *hp;
+	void (*prev_handler)(gint);
+
+	alarm(0);
+	prev_handler = signal(SIGALRM, timeout_handler);
+	if (sigsetjmp(jmpenv, 1)) {
+		alarm(0);
+		signal(SIGALRM, prev_handler);
+		fprintf(stderr, "%s: host lookup timed out.\n", hostname);
+		errno = 0;
+		return NULL;
+	}
+	alarm(io_timeout);
+
+	if ((hp = gethostbyname(hostname)) == NULL) {
+		alarm(0);
+		signal(SIGALRM, prev_handler);
+		fprintf(stderr, "%s: unknown host.\n", hostname);
+		errno = 0;
+		return NULL;
+	}
+
+	alarm(0);
+	signal(SIGALRM, prev_handler);
+
+	return hp;
+}
+
+#ifndef INET6
+static gint my_inet_aton(const gchar *hostname, struct in_addr *inp)
+{
+#if HAVE_INET_ATON
+	return inet_aton(hostname, inp);
+#else
+#if HAVE_INET_ADDR
+	guint32 inaddr;
+
+	inaddr = inet_addr(hostname);
+	if (inaddr != -1) {
+		memcpy(inp, &inaddr, sizeof(inaddr));
+		return 1;
+	} else
+		return 0;
+#else
+	return 0;
+#endif
+#endif /* HAVE_INET_ATON */
+}
+
+static gint sock_connect_by_hostname(gint sock, const gchar *hostname,
+				     gushort port)
+{
+	struct hostent *hp;
+	struct sockaddr_in ad;
+
+	memset(&ad, 0, sizeof(ad));
+	ad.sin_family = AF_INET;
+	ad.sin_port = htons(port);
+
+	if (!my_inet_aton(hostname, &ad.sin_addr)) {
+		if ((hp = my_gethostbyname(hostname)) == NULL) {
+			fprintf(stderr, "%s: unknown host.\n", hostname);
+			errno = 0;
+			return -1;
+		}
+
+		if (hp->h_length != 4 && hp->h_length != 8) {
+			fprintf(stderr, "illegal address length received for host %s\n", hostname);
+			errno = 0;
+			return -1;
+		}
+
+		memcpy(&ad.sin_addr, hp->h_addr, hp->h_length);
+	}
+
+	return sock_connect_with_timeout(sock, (struct sockaddr *)&ad,
+					 sizeof(ad), io_timeout);
+}
+
+#else /* INET6 */
+static gint sock_connect_by_getaddrinfo(const gchar *hostname, gushort	port)
+{
+	gint sock = -1, gai_error;
+	struct addrinfo hints, *res, *ai;
+	gchar port_str[6];
+
+	memset(&hints, 0, sizeof(hints));
+	/* hints.ai_flags = AI_CANONNAME; */
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_protocol = IPPROTO_TCP;
+
+	/* convert port from integer to string. */
+	g_snprintf(port_str, sizeof(port_str), "%d", port);
+
+	if ((gai_error = getaddrinfo(hostname, port_str, &hints, &res)) != 0) {
+		fprintf(stderr, "getaddrinfo for %s:%s failed: %s\n",
+			hostname, port_str, gai_strerror(gai_error));
+		return -1;
+	}
+
+	for (ai = res; ai != NULL; ai = ai->ai_next) {
+		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+		if (sock < 0)
+			continue;
+
+		if (sock_connect_with_timeout
+			(sock, ai->ai_addr, ai->ai_addrlen, io_timeout) == 0)
+			break;
+
+		close(sock);
+	}
+
+	if (res != NULL)
+		freeaddrinfo(res);
+
+	if (ai == NULL)
+		return -1;
+
+	return sock;
+}
+#endif /* !INET6 */
+
+SockInfo *sock_connect(const gchar *hostname, gushort port)
+{
+	gint sock;
+	SockInfo *sockinfo;
+
+#ifdef INET6
+	if ((sock = sock_connect_by_getaddrinfo(hostname, port)) < 0)
+		return NULL;
+#else
+	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		perror("socket");
+		return NULL;
+	}
+
+	if (sock_connect_by_hostname(sock, hostname, port) < 0) {
+		if (errno != 0) perror("connect");
+		close(sock);
+		return NULL;
+	}
+#endif /* INET6 */
+
+	sockinfo = g_new0(SockInfo, 1);
+	sockinfo->sock = sock;
+	sockinfo->sock_ch = g_io_channel_unix_new(sock);
+	sockinfo->hostname = g_strdup(hostname);
+	sockinfo->port = port;
+	sockinfo->state = CONN_ESTABLISHED;
+
+	usleep(100000);
+
+	return sockinfo;
+}
+
+static void sock_address_list_free(GList *addr_list)
+{
+	GList *cur;
+
+	for (cur = addr_list; cur != NULL; cur = cur->next) {
+		SockAddrData *addr_data = (SockAddrData *)cur->data;
+		g_free(addr_data->addr);
+		g_free(addr_data);
+	}
+
+	g_list_free(addr_list);
+}
+
+/* asynchronous TCP connection */
+
+static gboolean sock_connect_async_cb(GIOChannel *source,
+				      GIOCondition condition, gpointer data)
+{
+	SockConnectData *conn_data = (SockConnectData *)data;
+	gint fd;
+	gint val;
+	gint len;
+	SockInfo *sockinfo;
+
+	fd = g_io_channel_unix_get_fd(source);
+
+	conn_data->io_tag = 0;
+	conn_data->channel = NULL;
+	g_io_channel_unref(source);
+
+	len = sizeof(val);
+	if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &val, &len) < 0) {
+		perror("getsockopt");
+		close(fd);
+		sock_connect_address_list_async(conn_data);
+		return FALSE;
+	}
+
+	if (val != 0) {
+		close(fd);
+		sock_connect_address_list_async(conn_data);
+		return FALSE;
+	}
+
+	sockinfo = g_new0(SockInfo, 1);
+	sockinfo->sock = fd;
+	sockinfo->sock_ch = g_io_channel_unix_new(fd);
+	sockinfo->hostname = g_strdup(conn_data->hostname);
+	sockinfo->port = conn_data->port;
+	sockinfo->state = CONN_ESTABLISHED;
+
+	conn_data->func(sockinfo, conn_data->data);
+
+	sock_connect_async_cancel(conn_data->id);
+
+	return FALSE;
+}
+
+static gint sock_connect_async_get_address_info_cb(GList *addr_list,
+						   gpointer data)
+{
+	SockConnectData *conn_data = (SockConnectData *)data;
+
+	conn_data->addr_list = addr_list;
+	conn_data->cur_addr = addr_list;
+	conn_data->lookup_data = NULL;
+
+	return sock_connect_address_list_async(conn_data);
+}
+
+gint sock_connect_async(const gchar *hostname, gushort port,
+			SockConnectFunc func, gpointer data)
+{
+	static gint id = 1;
+	SockConnectData *conn_data;
+
+	conn_data = g_new0(SockConnectData, 1);
+	conn_data->id = id++;
+	conn_data->hostname = g_strdup(hostname);
+	conn_data->port = port;
+	conn_data->addr_list = NULL;
+	conn_data->cur_addr = NULL;
+	conn_data->io_tag = 0;
+	conn_data->func = func;
+	conn_data->data = data;
+
+	conn_data->lookup_data = sock_get_address_info_async
+		(hostname, port, sock_connect_async_get_address_info_cb,
+		 conn_data);
+
+	if (conn_data->lookup_data == NULL) {
+		g_free(conn_data->hostname);
+		g_free(conn_data);
+		return -1;
+	}
+
+	sock_connect_data_list = g_list_append(sock_connect_data_list,
+					       conn_data);
+
+	return conn_data->id;
+}
+
+gint sock_connect_async_cancel(gint id)
+{
+	SockConnectData *conn_data = NULL;
+	GList *cur;
+
+	for (cur = sock_connect_data_list; cur != NULL; cur = cur->next) {
+		if (((SockConnectData *)cur->data)->id == id) {
+			conn_data = (SockConnectData *)cur->data;
+			break;
+		}
+	}
+
+	if (conn_data) {
+		sock_connect_data_list = g_list_remove(sock_connect_data_list,
+						       conn_data);
+
+		if (conn_data->lookup_data)
+			sock_get_address_info_async_cancel
+				(conn_data->lookup_data);
+
+		if (conn_data->io_tag > 0)
+			g_source_remove(conn_data->io_tag);
+		if (conn_data->channel) {
+			g_io_channel_close(conn_data->channel);
+			g_io_channel_unref(conn_data->channel);
+		}
+
+		sock_address_list_free(conn_data->addr_list);
+		g_free(conn_data->hostname);
+		g_free(conn_data);
+	} else {
+		g_warning("sock_connect_async_cancel: id %d not found.\n", id);
+		return -1;
+	}
+
+	return 0;
+}
+
+static gint sock_connect_address_list_async(SockConnectData *conn_data)
+{
+	SockAddrData *addr_data;
+	gint sock = -1;
+
+	for (; conn_data->cur_addr != NULL;
+	     conn_data->cur_addr = conn_data->cur_addr->next) {
+		addr_data = (SockAddrData *)conn_data->cur_addr->data;
+
+		if ((sock = socket(addr_data->family, addr_data->socktype,
+				   addr_data->protocol)) < 0) {
+			perror("socket");
+			continue;
+		}
+
+		set_nonblocking_mode(sock, TRUE);
+
+		if (connect(sock, addr_data->addr, addr_data->addr_len) < 0) {
+			if (EINPROGRESS == errno) {
+				break;
+			} else {
+				perror("connect");
+				close(sock);
+			}
+		} else
+			break;
+	}
+
+	if (conn_data->cur_addr == NULL) {
+		g_warning("sock_connect_address_list_async: "
+			  "connection to %s:%d failed\n",
+			  conn_data->hostname, conn_data->port);
+		conn_data->func(NULL, conn_data->data);
+		sock_connect_async_cancel(conn_data->id);
+		return -1;
+	}
+
+	conn_data->cur_addr = conn_data->cur_addr->next;
+
+	conn_data->channel = g_io_channel_unix_new(sock);
+	conn_data->io_tag = g_io_add_watch(conn_data->channel, G_IO_IN|G_IO_OUT,
+					   sock_connect_async_cb, conn_data);
+
+	return 0;
+}
+
+/* asynchronous DNS lookup */
+
+static gboolean sock_get_address_info_async_cb(GIOChannel *source,
+					       GIOCondition condition,
+					       gpointer data)
+{
+	SockLookupData *lookup_data = (SockLookupData *)data;
+	GList *addr_list = NULL;
+	SockAddrData *addr_data;
+	gsize bytes_read;
+	gint ai_member[4];
+	struct sockaddr *addr;
+
+	for (;;) {
+		if (g_io_channel_read(source, (gchar *)ai_member,
+				      sizeof(ai_member), &bytes_read)
+		    != G_IO_ERROR_NONE) {
+			g_warning("sock_get_address_info_async_cb: "
+				  "address length read error\n");
+			break;
+		}
+
+		if (bytes_read == 0 || bytes_read != sizeof(ai_member))
+			break;
+
+		if (ai_member[0] == AF_UNSPEC) {
+			g_warning("DNS lookup failed\n");
+			break;
+		}
+
+		addr = g_malloc(ai_member[3]);
+		if (g_io_channel_read(source, (gchar *)addr, ai_member[3],
+				      &bytes_read)
+		    != G_IO_ERROR_NONE) {
+			g_warning("sock_get_address_info_async_cb: "
+				  "address data read error\n");
+			g_free(addr);
+			break;
+		}
+
+		if (bytes_read != ai_member[3]) {
+			g_warning("sock_get_address_info_async_cb: "
+				  "incomplete address data\n");
+			g_free(addr);
+			break;
+		}
+
+		addr_data = g_new0(SockAddrData, 1);
+		addr_data->family = ai_member[0];
+		addr_data->socktype = ai_member[1];
+		addr_data->protocol = ai_member[2];
+		addr_data->addr_len = ai_member[3];
+		addr_data->addr = addr;
+
+		addr_list = g_list_append(addr_list, addr_data);
+	}
+
+	g_io_channel_close(source);
+	g_io_channel_unref(source);
+
+	kill(lookup_data->child_pid, SIGKILL);
+	waitpid(lookup_data->child_pid, NULL, 0);
+
+	lookup_data->func(addr_list, lookup_data->data);
+
+	g_free(lookup_data->hostname);
+	g_free(lookup_data);
+
+	return FALSE;
+}
+
+static SockLookupData *sock_get_address_info_async(const gchar *hostname,
+						   gushort port,
+						   SockAddrFunc func,
+						   gpointer data)
+{
+	SockLookupData *lookup_data = NULL;
+	gint pipe_fds[2];
+	pid_t pid;
+
+	if (pipe(pipe_fds) < 0) {
+		perror("pipe");
+		func(NULL, data);
+		return NULL;
+	}
+
+	if ((pid = fork()) < 0) {
+		perror("fork");
+		func(NULL, data);
+		return NULL;
+	}
+
+	/* child process */
+	if (pid == 0) {
+#ifdef INET6
+		gint gai_err;
+		struct addrinfo hints, *res, *ai;
+		gchar port_str[6];
+#else /* !INET6 */
+		struct hostent *hp;
+		gchar **addr_list_p;
+		struct sockaddr_in ad;
+#endif /* INET6 */
+		gint ai_member[4] = {AF_UNSPEC, 0, 0, 0};
+
+		close(pipe_fds[0]);
+
+#ifdef INET6
+		memset(&hints, 0, sizeof(hints));
+		/* hints.ai_flags = AI_CANONNAME; */
+		hints.ai_family = AF_UNSPEC;
+		hints.ai_socktype = SOCK_STREAM;
+		hints.ai_protocol = IPPROTO_TCP;
+
+		g_snprintf(port_str, sizeof(port_str), "%d", port);
+
+		gai_err = getaddrinfo(hostname, port_str, &hints, &res);
+		if (gai_err != 0) {
+			g_warning("getaddrinfo for %s:%s failed: %s\n",
+				  hostname, port_str, gai_strerror(gai_err));
+			fd_write_all(pipe_fds[1], (gchar *)ai_member,
+				     sizeof(ai_member));
+			close(pipe_fds[1]);
+			_exit(1);
+		}
+
+		for (ai = res; ai != NULL; ai = ai->ai_next) {
+			ai_member[0] = ai->ai_family;
+			ai_member[1] = ai->ai_socktype;
+			ai_member[2] = ai->ai_protocol;
+			ai_member[3] = ai->ai_addrlen;
+
+			fd_write_all(pipe_fds[1], (gchar *)ai_member,
+				     sizeof(ai_member));
+			fd_write_all(pipe_fds[1], (gchar *)ai->ai_addr,
+				     ai->ai_addrlen);
+		}
+
+		if (res != NULL)
+			freeaddrinfo(res);
+#else /* !INET6 */
+		hp = my_gethostbyname(hostname);
+		if (hp == NULL || hp->h_addrtype != AF_INET) {
+			fd_write_all(pipe_fds[1], (gchar *)ai_member,
+				     sizeof(ai_member));
+			close(pipe_fds[1]);
+			_exit(1);
+		}
+
+		ai_member[0] = AF_INET;
+		ai_member[1] = SOCK_STREAM;
+		ai_member[2] = IPPROTO_TCP;
+		ai_member[3] = sizeof(ad);
+
+		memset(&ad, 0, sizeof(ad));
+		ad.sin_family = AF_INET;
+		ad.sin_port = htons(port);
+
+		for (addr_list_p = hp->h_addr_list; *addr_list_p != NULL;
+		     addr_list_p++) {
+			memcpy(&ad.sin_addr, *addr_list_p, hp->h_length);
+			fd_write_all(pipe_fds[1], (gchar *)ai_member,
+				     sizeof(ai_member));
+			fd_write_all(pipe_fds[1], (gchar *)&ad, sizeof(ad));
+		}
+#endif /* INET6 */
+
+		close(pipe_fds[1]);
+
+		_exit(0);
+	} else {
+		close(pipe_fds[1]);
+
+		lookup_data = g_new0(SockLookupData, 1);
+		lookup_data->hostname = g_strdup(hostname);
+		lookup_data->child_pid = pid;
+		lookup_data->func = func;
+		lookup_data->data = data;
+
+		lookup_data->channel = g_io_channel_unix_new(pipe_fds[0]);
+		lookup_data->io_tag = g_io_add_watch
+			(lookup_data->channel, G_IO_IN,
+			 sock_get_address_info_async_cb, lookup_data);
+	}
+
+	return lookup_data;
+}
+
+static gint sock_get_address_info_async_cancel(SockLookupData *lookup_data)
+{
+	if (lookup_data->io_tag > 0)
+		g_source_remove(lookup_data->io_tag);
+	if (lookup_data->channel) {
+		g_io_channel_close(lookup_data->channel);
+		g_io_channel_unref(lookup_data->channel);
+	}
+
+	if (lookup_data->child_pid > 0) {
+		kill(lookup_data->child_pid, SIGKILL);
+		waitpid(lookup_data->child_pid, NULL, 0);
+	}
+
+	g_free(lookup_data->hostname);
+	g_free(lookup_data);
+
+	return 0;
+}
+
+
+gint sock_printf(SockInfo *sock, const gchar *format, ...)
+{
+	va_list args;
+	gchar buf[BUFFSIZE];
+
+	va_start(args, format);
+	g_vsnprintf(buf, sizeof(buf), format, args);
+	va_end(args);
+
+	return sock_write_all(sock, buf, strlen(buf));
+}
+
+gint sock_read(SockInfo *sock, gchar *buf, gint len)
+{
+	g_return_val_if_fail(sock != NULL, -1);
+
+#if USE_SSL
+	if (sock->ssl)
+		return ssl_read(sock->ssl, buf, len);
+#endif
+	return fd_read(sock->sock, buf, len);
+}
+
+gint fd_read(gint fd, gchar *buf, gint len)
+{
+	if (fd_check_io(fd, G_IO_IN) < 0)
+		return -1;
+
+	return read(fd, buf, len);
+}
+
+#if USE_SSL
+gint ssl_read(SSL *ssl, gchar *buf, gint len)
+{
+	gint ret;
+
+	if (SSL_pending(ssl) == 0) {
+		if (fd_check_io(SSL_get_rfd(ssl), G_IO_IN) < 0)
+			return -1;
+	}
+
+	ret = SSL_read(ssl, buf, len);
+
+	switch (SSL_get_error(ssl, ret)) {
+	case SSL_ERROR_NONE:
+		return ret;
+	case SSL_ERROR_WANT_READ:
+	case SSL_ERROR_WANT_WRITE:
+		errno = EAGAIN;
+		return -1;
+	default:
+		return -1;
+	}
+}
+#endif
+
+gint sock_write(SockInfo *sock, const gchar *buf, gint len)
+{
+	g_return_val_if_fail(sock != NULL, -1);
+
+#if USE_SSL
+	if (sock->ssl)
+		return ssl_write(sock->ssl, buf, len);
+#endif
+	return fd_write(sock->sock, buf, len);
+}
+
+gint fd_write(gint fd, const gchar *buf, gint len)
+{
+	if (fd_check_io(fd, G_IO_OUT) < 0)
+		return -1;
+
+	return write(fd, buf, len);
+}
+
+#if USE_SSL
+gint ssl_write(SSL *ssl, const gchar *buf, gint len)
+{
+	gint ret;
+
+	ret = SSL_write(ssl, buf, len);
+
+	switch (SSL_get_error(ssl, ret)) {
+	case SSL_ERROR_NONE:
+		return ret;
+	case SSL_ERROR_WANT_READ:
+	case SSL_ERROR_WANT_WRITE:
+		errno = EAGAIN;
+		return -1;
+	default:
+		return -1;
+	}
+}
+#endif
+
+gint sock_write_all(SockInfo *sock, const gchar *buf, gint len)
+{
+	g_return_val_if_fail(sock != NULL, -1);
+
+#if USE_SSL
+	if (sock->ssl)
+		return ssl_write_all(sock->ssl, buf, len);
+#endif
+	return fd_write_all(sock->sock, buf, len);
+}
+
+gint fd_write_all(gint fd, const gchar *buf, gint len)
+{
+	gint n, wrlen = 0;
+
+	while (len) {
+		if (fd_check_io(fd, G_IO_OUT) < 0)
+			return -1;
+		n = write(fd, buf, len);
+		if (n <= 0)
+			return -1;
+		len -= n;
+		wrlen += n;
+		buf += n;
+	}
+
+	return wrlen;
+}
+
+#if USE_SSL
+gint ssl_write_all(SSL *ssl, const gchar *buf, gint len)
+{
+	gint n, wrlen = 0;
+
+	while (len) {
+		n = ssl_write(ssl, buf, len);
+		if (n <= 0)
+			return -1;
+		len -= n;
+		wrlen += n;
+		buf += n;
+	}
+
+	return wrlen;
+}
+#endif
+
+gint fd_recv(gint fd, gchar *buf, gint len, gint flags)
+{
+	if (fd_check_io(fd, G_IO_IN) < 0)
+		return -1;
+
+	return recv(fd, buf, len, flags);
+}
+
+gint fd_gets(gint fd, gchar *buf, gint len)
+{
+	gchar *newline, *bp = buf;
+	gint n;
+
+	if (--len < 1)
+		return -1;
+	do {
+		if ((n = fd_recv(fd, bp, len, MSG_PEEK)) <= 0)
+			return -1;
+		if ((newline = memchr(bp, '\n', n)) != NULL)
+			n = newline - bp + 1;
+		if ((n = fd_read(fd, bp, n)) < 0)
+			return -1;
+		bp += n;
+		len -= n;
+	} while (!newline && len);
+
+	*bp = '\0';
+	return bp - buf;
+}
+
+#if USE_SSL
+gint ssl_gets(SSL *ssl, gchar *buf, gint len)
+{
+	gchar *newline, *bp = buf;
+	gint n;
+
+	if (--len < 1)
+		return -1;
+	do {
+		if ((n = ssl_peek(ssl, bp, len)) <= 0)
+			return -1;
+		if ((newline = memchr(bp, '\n', n)) != NULL)
+			n = newline - bp + 1;
+		if ((n = ssl_read(ssl, bp, n)) < 0)
+			return -1;
+		bp += n;
+		len -= n;
+	} while (!newline && len);
+
+	*bp = '\0';
+	return bp - buf;
+}
+#endif
+
+gint sock_gets(SockInfo *sock, gchar *buf, gint len)
+{
+	g_return_val_if_fail(sock != NULL, -1);
+
+#if USE_SSL
+	if (sock->ssl)
+		return ssl_gets(sock->ssl, buf, len);
+#endif
+	return fd_gets(sock->sock, buf, len);
+}
+
+gchar *fd_getline(gint fd)
+{
+	gchar buf[BUFFSIZE];
+	gchar *str = NULL;
+	gint len;
+	gulong size = 1;
+
+	while ((len = fd_gets(fd, buf, sizeof(buf))) > 0) {
+		size += len;
+		if (!str)
+			str = g_strdup(buf);
+		else {
+			str = g_realloc(str, size);
+			strcat(str, buf);
+		}
+		if (buf[len - 1] == '\n')
+			break;
+	}
+
+	return str;
+}
+
+#if USE_SSL
+gchar *ssl_getline(SSL *ssl)
+{
+	gchar buf[BUFFSIZE];
+	gchar *str = NULL;
+	gint len;
+	gulong size = 1;
+
+	while ((len = ssl_gets(ssl, buf, sizeof(buf))) > 0) {
+		size += len;
+		if (!str)
+			str = g_strdup(buf);
+		else {
+			str = g_realloc(str, size);
+			strcat(str, buf);
+		}
+		if (buf[len - 1] == '\n')
+			break;
+	}
+
+	return str;
+}
+#endif
+
+gchar *sock_getline(SockInfo *sock)
+{
+	g_return_val_if_fail(sock != NULL, NULL);
+
+#if USE_SSL
+	if (sock->ssl)
+		return ssl_getline(sock->ssl);
+#endif
+	return fd_getline(sock->sock);
+}
+
+gint sock_puts(SockInfo *sock, const gchar *buf)
+{
+	gint ret;
+
+	if ((ret = sock_write_all(sock, buf, strlen(buf))) < 0)
+		return ret;
+	return sock_write_all(sock, "\r\n", 2);
+}
+
+/* peek at the socket data without actually reading it */
+#if USE_SSL
+gint ssl_peek(SSL *ssl, gchar *buf, gint len)
+{
+	gint ret;
+
+	if (SSL_pending(ssl) == 0) {
+		if (fd_check_io(SSL_get_rfd(ssl), G_IO_IN) < 0)
+			return -1;
+	}
+
+	ret = SSL_peek(ssl, buf, len);
+
+	switch (SSL_get_error(ssl, ret)) {
+	case SSL_ERROR_NONE:
+		return ret;
+	case SSL_ERROR_WANT_READ:
+	case SSL_ERROR_WANT_WRITE:
+		errno = EAGAIN;
+		return -1;
+	default:
+		return -1;
+	}
+}
+#endif
+
+gint sock_peek(SockInfo *sock, gchar *buf, gint len)
+{
+	g_return_val_if_fail(sock != NULL, -1);
+
+#if USE_SSL
+	if (sock->ssl)
+		return ssl_peek(sock->ssl, buf, len);
+#endif
+	return fd_recv(sock->sock, buf, len, MSG_PEEK);
+}
+
+gint sock_close(SockInfo *sock)
+{
+	gint ret;
+
+	if (!sock)
+		return 0;
+
+	if (sock->sock_ch)
+		g_io_channel_unref(sock->sock_ch);
+
+#if USE_SSL
+	if (sock->ssl)
+		ssl_done_socket(sock);
+#endif
+	ret = fd_close(sock->sock); 
+	g_free(sock->hostname);
+	g_free(sock);
+
+	return ret;
+}
+
+gint fd_close(gint fd)
+{
+	return close(fd);
+}