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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) 2012 Google, Inc.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <ModemManager.h>
#define _LIBMM_INSIDE_MM
#include <libmm-glib.h>
#include "mm-modem-helpers.h"
#include "mm-base-modem-at.h"
#include "mm-sim-novatel-lte.h"
G_DEFINE_TYPE (MMSimNovatelLte, mm_sim_novatel_lte, MM_TYPE_BASE_SIM)
/*****************************************************************************/
/* IMSI loading */
static gchar *
load_imsi_finish (MMBaseSim *self,
GAsyncResult *res,
GError **error)
{
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
imsi_read_ready (MMBaseModem *modem,
GAsyncResult *res,
GTask *task)
{
GError *error = NULL;
const gchar *response, *str;
gchar buf[19];
gchar imsi[16];
gsize len = 0;
gint sw1, sw2;
gint i;
response = mm_base_modem_at_command_finish (modem, res, &error);
if (!response) {
g_task_return_error (task, error);
g_object_unref (task);
return;
}
memset (buf, 0, sizeof (buf));
str = mm_strip_tag (response, "+CRSM:");
/* With or without quotes... */
if (sscanf (str, "%d,%d,\"%18c\"", &sw1, &sw2, (char *) &buf) != 3 &&
sscanf (str, "%d,%d,%18c", &sw1, &sw2, (char *) &buf) != 3) {
g_task_return_new_error (task,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"Failed to parse the CRSM response: '%s'",
response);
g_object_unref (task);
return;
}
if ((sw1 != 0x90 || sw2 != 0x00) &&
(sw1 != 0x91) &&
(sw1 != 0x92) &&
(sw1 != 0x9f)) {
g_task_return_new_error (task,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"SIM failed to handle CRSM request (sw1 %d sw2 %d)",
sw1, sw2);
g_object_unref (task);
return;
}
/* Make sure the buffer is only digits or 'F' */
for (len = 0; len < sizeof (buf) && buf[len]; len++) {
if (isdigit (buf[len]))
continue;
if (buf[len] == 'F' || buf[len] == 'f') {
buf[len] = 'F'; /* canonicalize the F */
continue;
}
if (buf[len] == '\"') {
buf[len] = 0;
break;
}
/* Invalid character */
g_task_return_new_error (task,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"CRSM IMSI response contained invalid character '%c'",
buf[len]);
g_object_unref (task);
return;
}
/* BCD encoded IMSIs plus the length byte and parity are 18 digits long */
if (len != 18) {
g_task_return_new_error (task,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"Invalid +CRSM IMSI response size (was %zd, expected 18)",
len);
g_object_unref (task);
return;
}
/* Skip the length byte (digit 0-1) and parity (digit 3). Swap digits in
* the EFimsi response to get the actual IMSI, each group of 2 digits is
* reversed in the +CRSM response. i.e.:
*
* **0*21436587a9cbed -> 0123456789abcde
*/
memset (imsi, 0, sizeof (imsi));
imsi[0] = buf[2];
for (i = 1; i < 8; i++) {
imsi[(i * 2) - 1] = buf[(i * 2) + 3];
imsi[i * 2] = buf[(i * 2) + 2];
}
/* Zero out the first F, if any, for IMSIs shorter than 15 digits */
for (i = 0; i < 15; i++) {
if (imsi[i] == 'F') {
imsi[i++] = 0;
break;
}
}
/* Ensure all 'F's, if any, are at the end */
for (; i < 15; i++) {
if (imsi[i] != 'F') {
g_task_return_new_error (task,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"Invalid +CRSM IMSI length (unexpected F)");
g_object_unref (task);
return;
}
}
g_task_return_pointer (task, g_strdup (imsi), g_free);
g_object_unref (task);
}
static void
load_imsi (MMBaseSim *self,
GAsyncReadyCallback callback,
gpointer user_data)
{
MMBaseModem *modem = NULL;
g_object_get (self,
MM_BASE_SIM_MODEM, &modem,
NULL);
mm_base_modem_at_command (
modem,
"+CRSM=176,28423,0,0,9",
3,
FALSE,
(GAsyncReadyCallback)imsi_read_ready,
g_task_new (self, NULL, callback, user_data));
g_object_unref (modem);
}
/*****************************************************************************/
MMBaseSim *
mm_sim_novatel_lte_new_finish (GAsyncResult *res,
GError **error)
{
GObject *source;
GObject *sim;
source = g_async_result_get_source_object (res);
sim = g_async_initable_new_finish (G_ASYNC_INITABLE (source), res, error);
g_object_unref (source);
if (!sim)
return NULL;
/* Only export valid SIMs */
mm_base_sim_export (MM_BASE_SIM (sim));
return MM_BASE_SIM (sim);
}
void
mm_sim_novatel_lte_new (MMBaseModem *modem,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_async_initable_new_async (MM_TYPE_SIM_NOVATEL_LTE,
G_PRIORITY_DEFAULT,
cancellable,
callback,
user_data,
MM_BASE_SIM_MODEM, modem,
"active", TRUE, /* by default always active */
NULL);
}
static void
mm_sim_novatel_lte_init (MMSimNovatelLte *self)
{
}
static void
mm_sim_novatel_lte_class_init (MMSimNovatelLteClass *klass)
{
MMBaseSimClass *base_sim_class = MM_BASE_SIM_CLASS (klass);
base_sim_class->load_imsi = load_imsi;
base_sim_class->load_imsi_finish = load_imsi_finish;
}
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