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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* 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:
*
* Copyright (C) 2008 - 2009 Novell, Inc.
* Copyright (C) 2009 - 2010 Red Hat, Inc.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "mm-qcdm-serial-port.h"
#include "mm-errors.h"
#include "mm-options.h"
#include "libqcdm/src/com.h"
#include "libqcdm/src/utils.h"
G_DEFINE_TYPE (MMQcdmSerialPort, mm_qcdm_serial_port, MM_TYPE_SERIAL_PORT)
#define MM_QCDM_SERIAL_PORT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), MM_TYPE_QCDM_SERIAL_PORT, MMQcdmSerialPortPrivate))
typedef struct {
gboolean foo;
} MMQcdmSerialPortPrivate;
/*****************************************************************************/
static gboolean
parse_response (MMSerialPort *port, GByteArray *response, GError **error)
{
int i;
/* Look for the QCDM packet termination character; if we found it, treat
* the buffer as a qcdm command.
*/
for (i = 0; i < response->len; i++) {
if (response->data[i] == 0x7E)
return TRUE;
}
/* Otherwise, need more data from the device */
return FALSE;
}
static gsize
handle_response (MMSerialPort *port,
GByteArray *response,
GError *error,
GCallback callback,
gpointer callback_data)
{
MMQcdmSerialResponseFn response_callback = (MMQcdmSerialResponseFn) callback;
GByteArray *unescaped = NULL;
GError *dm_error = NULL;
gsize used = 0;
/* Ignore empty frames */
if (response->len > 0 && response->data[0] == 0x7E)
return 1;
if (!error) {
gboolean more = FALSE, success;
gsize unescaped_len = 0;
/* FIXME: don't munge around with byte array internals */
unescaped = g_byte_array_sized_new (1024);
success = dm_decapsulate_buffer ((const char *) response->data,
response->len,
(char *) unescaped->data,
1024,
&unescaped_len,
&used,
&more);
if (!success) {
g_set_error_literal (&dm_error,
MM_MODEM_ERROR, MM_MODEM_ERROR_GENERAL,
"Failed to unescape QCDM packet.");
g_byte_array_free (unescaped, TRUE);
unescaped = NULL;
} else if (more) {
/* Need more data; we shouldn't have gotten here since the parse
* function checks for the end-of-frame marker, but whatever.
*/
return 0;
} else {
/* Successfully decapsulated the DM command */
unescaped->len = (guint) unescaped_len;
}
}
response_callback (MM_QCDM_SERIAL_PORT (port),
unescaped,
dm_error ? dm_error : error,
callback_data);
if (unescaped)
g_byte_array_free (unescaped, TRUE);
return used;
}
/*****************************************************************************/
void
mm_qcdm_serial_port_queue_command (MMQcdmSerialPort *self,
GByteArray *command,
guint32 timeout_seconds,
MMQcdmSerialResponseFn callback,
gpointer user_data)
{
g_return_if_fail (self != NULL);
g_return_if_fail (MM_IS_QCDM_SERIAL_PORT (self));
g_return_if_fail (command != NULL);
/* 'command' is expected to be already CRC-ed and escaped */
mm_serial_port_queue_command (MM_SERIAL_PORT (self),
command,
TRUE,
timeout_seconds,
(MMSerialResponseFn) callback,
user_data);
}
void
mm_qcdm_serial_port_queue_command_cached (MMQcdmSerialPort *self,
GByteArray *command,
guint32 timeout_seconds,
MMQcdmSerialResponseFn callback,
gpointer user_data)
{
g_return_if_fail (self != NULL);
g_return_if_fail (MM_IS_QCDM_SERIAL_PORT (self));
g_return_if_fail (command != NULL);
/* 'command' is expected to be already CRC-ed and escaped */
mm_serial_port_queue_command_cached (MM_SERIAL_PORT (self),
command,
TRUE,
timeout_seconds,
(MMSerialResponseFn) callback,
user_data);
}
static void
debug_log (MMSerialPort *port, const char *prefix, const char *buf, gsize len)
{
static GString *debug = NULL;
const char *s = buf;
GTimeVal tv;
if (!debug)
debug = g_string_sized_new (512);
g_string_append (debug, prefix);
while (len--)
g_string_append_printf (debug, " %02x", (guint8) (*s++ & 0xFF));
g_get_current_time (&tv);
g_debug ("<%ld.%ld> (%s): %s",
tv.tv_sec,
tv.tv_usec,
mm_port_get_device (MM_PORT (port)),
debug->str);
g_string_truncate (debug, 0);
}
/*****************************************************************************/
static gboolean
config_fd (MMSerialPort *port, int fd, GError **error)
{
return qcdm_port_setup (fd, error);
}
/*****************************************************************************/
MMQcdmSerialPort *
mm_qcdm_serial_port_new (const char *name, MMPortType ptype)
{
return MM_QCDM_SERIAL_PORT (g_object_new (MM_TYPE_QCDM_SERIAL_PORT,
MM_PORT_DEVICE, name,
MM_PORT_SUBSYS, MM_PORT_SUBSYS_TTY,
MM_PORT_TYPE, ptype,
NULL));
}
static void
mm_qcdm_serial_port_init (MMQcdmSerialPort *self)
{
}
static void
finalize (GObject *object)
{
G_OBJECT_CLASS (mm_qcdm_serial_port_parent_class)->finalize (object);
}
static void
mm_qcdm_serial_port_class_init (MMQcdmSerialPortClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
MMSerialPortClass *port_class = MM_SERIAL_PORT_CLASS (klass);
g_type_class_add_private (object_class, sizeof (MMQcdmSerialPortPrivate));
/* Virtual methods */
object_class->finalize = finalize;
port_class->parse_response = parse_response;
port_class->handle_response = handle_response;
port_class->config_fd = config_fd;
port_class->debug_log = debug_log;
}
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