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/* HexChat
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <string.h>
#include <gio/gio.h>
#include "hexchat-plugin.h"
#define _(x) hexchat_gettext(ph,x)
static hexchat_plugin *ph;
static GSocketService *service;
static GHashTable *responses;
struct ident_info
{
GSocketConnection *conn;
gchar *username;
gchar read_buf[16];
} typedef ident_info;
static int
identd_cleanup_response_cb (gpointer userdata)
{
g_return_val_if_fail (responses != NULL, 0);
g_hash_table_remove (responses, userdata);
return 0;
}
static int
identd_command_cb (char *word[], char *word_eol[], void *userdata)
{
g_return_val_if_fail (responses != NULL, HEXCHAT_EAT_ALL);
if (word[2] && *word[2] && word[3] && *word[3])
{
guint64 port = g_ascii_strtoull (word[2], NULL, 0);
if (port && port <= G_MAXUINT16)
{
g_hash_table_insert (responses, GINT_TO_POINTER (port), g_strdup (word[3]));
/* Automatically remove entry after 30 seconds */
hexchat_hook_timer (ph, 30000, identd_cleanup_response_cb, GINT_TO_POINTER (port));
}
}
else
{
hexchat_command (ph, "HELP IDENTD");
}
return HEXCHAT_EAT_HEXCHAT;
}
static void
identd_write_ready (GOutputStream *stream, GAsyncResult *res, ident_info *info)
{
g_output_stream_write_finish (stream, res, NULL);
g_free (info->username);
g_object_unref (info->conn);
g_free (info);
}
static void
identd_read_ready (GInputStream *in_stream, GAsyncResult *res, ident_info *info)
{
GSocketAddress *sok_addr;
GOutputStream *out_stream;
guint64 local, remote;
gchar buf[512], *p;
if (g_input_stream_read_finish (in_stream, res, NULL))
{
local = g_ascii_strtoull (info->read_buf, NULL, 0);
p = strchr (info->read_buf, ',');
if (!p)
goto cleanup;
remote = g_ascii_strtoull (p + 1, NULL, 0);
if (!local || !remote || local > G_MAXUINT16 || remote > G_MAXUINT16)
goto cleanup;
info->username = g_strdup (g_hash_table_lookup (responses, GINT_TO_POINTER (local)));
if (!info->username)
goto cleanup;
g_hash_table_remove (responses, GINT_TO_POINTER (local));
if ((sok_addr = g_socket_connection_get_remote_address (info->conn, NULL)))
{
GInetAddress *inet_addr;
gchar *addr;
inet_addr = g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (sok_addr));
addr = g_inet_address_to_string (inet_addr);
hexchat_printf (ph, _("*\tServicing ident request from %s as %s"), addr, info->username);
g_object_unref (sok_addr);
g_object_unref (inet_addr);
g_free (addr);
}
g_snprintf (buf, sizeof (buf), "%"G_GUINT16_FORMAT", %"G_GUINT16_FORMAT" : USERID : UNIX : %s\r\n", (guint16)local, (guint16)remote, info->username);
out_stream = g_io_stream_get_output_stream (G_IO_STREAM (info->conn));
g_output_stream_write_async (out_stream, buf, strlen (buf), G_PRIORITY_DEFAULT,
NULL, (GAsyncReadyCallback)identd_write_ready, info);
}
return;
cleanup:
g_object_unref (info->conn);
g_free (info);
}
static gboolean
identd_incoming_cb (GSocketService *service, GSocketConnection *conn,
GObject *source, gpointer userdata)
{
GInputStream *stream;
ident_info *info;
info = g_new0 (ident_info, 1);
info->conn = conn;
g_object_ref (conn);
stream = g_io_stream_get_input_stream (G_IO_STREAM (conn));
g_input_stream_read_async (stream, info->read_buf, sizeof (info->read_buf), G_PRIORITY_DEFAULT,
NULL, (GAsyncReadyCallback)identd_read_ready, info);
return TRUE;
}
static gboolean
identd_start_server (void)
{
GError *error = NULL;
int enabled, port = 113;
if (hexchat_get_prefs (ph, "identd", NULL, &enabled) == 3)
{
if (!enabled)
return TRUE; /* Count as loaded successfully but don't start service */
}
if (hexchat_get_prefs (ph, "identd_port", NULL, &port) == 2 && (port <= 0 || port > G_MAXUINT16))
{
port = 113;
}
service = g_socket_service_new ();
g_socket_listener_add_inet_port (G_SOCKET_LISTENER (service), port, NULL, &error);
if (error)
{
hexchat_printf (ph, _("*\tError starting identd server: %s"), error->message);
g_object_unref (service);
return FALSE;
}
/*hexchat_printf (ph, "*\tIdentd listening on port: %d", port); */
g_signal_connect (G_OBJECT (service), "incoming", G_CALLBACK(identd_incoming_cb), NULL);
g_socket_service_start (service);
return TRUE;
}
int
identd_plugin_init (hexchat_plugin *plugin_handle, char **plugin_name,
char **plugin_desc, char **plugin_version, char *arg)
{
ph = plugin_handle;
*plugin_name = "";
*plugin_desc = "";
*plugin_version = "";
responses = g_hash_table_new_full (NULL, NULL, NULL, g_free);
hexchat_hook_command (ph, "IDENTD", HEXCHAT_PRI_NORM, identd_command_cb,
_("IDENTD <port> <username>"), NULL);
return identd_start_server ();
}
int
identd_plugin_deinit (void)
{
if (service)
{
g_socket_service_stop (service);
g_object_unref (service);
}
g_hash_table_destroy (responses);
return 1;
}
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