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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) 2013 Google Inc.
*
*/
#include <stdlib.h>
#include <string.h>
#include <ModemManager.h>
#define _LIBMM_INSIDE_MM
#include <libmm-glib.h>
#include "mm-modem-helpers-altair-lte.h"
#define MM_ALTAIR_IMS_PDN_CID 1
#define MM_ALTAIR_INTERNET_PDN_CID 3
/*****************************************************************************/
/* Bands response parser */
GArray *
mm_altair_parse_bands_response (const gchar *response)
{
gchar **split;
GArray *bands;
guint i;
/*
* Response is "<band>[,<band>...]"
*/
split = g_strsplit_set (response, ",", -1);
if (!split)
return NULL;
bands = g_array_sized_new (FALSE, FALSE, sizeof (MMModemBand), g_strv_length (split));
for (i = 0; split[i]; i++) {
guint32 band_value;
MMModemBand band;
band_value = (guint32)strtoul (split[i], NULL, 10);
band = MM_MODEM_BAND_EUTRAN_1 - 1 + band_value;
/* Due to a firmware issue, the modem may incorrectly includes 0 in the
* bands response. We thus ignore any band value outside the range of
* E-UTRAN operating bands. */
if (band >= MM_MODEM_BAND_EUTRAN_1 && band <= MM_MODEM_BAND_EUTRAN_44)
g_array_append_val (bands, band);
}
g_strfreev (split);
return bands;
}
/*****************************************************************************/
/* +CEER response parser */
gchar *
mm_altair_parse_ceer_response (const gchar *response,
GError **error)
{
g_autoptr(GRegex) r = NULL;
g_autoptr(GMatchInfo) match_info = NULL;
gchar *ceer_response = NULL;
/* First accept an empty response as the no error case. Sometimes, the only
* response to the AT+CEER query is an OK.
*/
if (g_strcmp0 ("", response) == 0) {
return g_strdup ("");
}
/* The response we are interested in looks so:
* +CEER: EPS_AND_NON_EPS_SERVICES_NOT_ALLOWED
*/
r = g_regex_new ("\\+CEER:\\s*(\\w*)?",
G_REGEX_RAW,
0, NULL);
g_assert (r != NULL);
if (!g_regex_match (r, response, 0, &match_info)) {
g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED, "Could not parse +CEER response");
return NULL;
}
if (g_match_info_matches (match_info)) {
ceer_response = mm_get_string_unquoted_from_match_info (match_info, 1);
if (!ceer_response)
ceer_response = g_strdup ("");
}
return ceer_response;
}
/*****************************************************************************/
/* %CGINFO="cid",1 response parser */
gint
mm_altair_parse_cid (const gchar *response, GError **error)
{
g_autoptr(GRegex) regex = NULL;
g_autoptr(GMatchInfo) match_info = NULL;
guint cid = -1;
regex = g_regex_new ("\\%CGINFO:\\s*(\\d+)", G_REGEX_RAW, 0, NULL);
g_assert (regex);
if (!g_regex_match_full (regex, response, strlen (response), 0, 0, &match_info, error))
return -1;
if (!mm_get_uint_from_match_info (match_info, 1, &cid))
g_set_error (error,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"Failed to parse %%CGINFO=\"cid\",1 response");
return cid;
}
/*****************************************************************************/
/* %PCOINFO response parser */
MMPco *
mm_altair_parse_vendor_pco_info (const gchar *pco_info, GError **error)
{
g_autoptr(GRegex) regex = NULL;
g_autoptr(GMatchInfo) match_info = NULL;
MMPco *pco = NULL;
gint num_matches;
if (!pco_info || !pco_info[0]) {
g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_INVALID_ARGS,
"No PCO info given");
return NULL;
}
/* Expected %PCOINFO response:
*
* Solicited response: %PCOINFO:<mode>,<cid>[,<pcoid>[,<payload>]]
* Unsolicited response: %PCOINFO:<cid>,<pcoid>[,<payload>]
*/
regex = g_regex_new ("\\%PCOINFO:(?:\\s*\\d+\\s*,)?(\\d+)\\s*(,([^,\\)]*),([0-9A-Fa-f]*))?",
G_REGEX_DOLLAR_ENDONLY | G_REGEX_RAW,
0, NULL);
g_assert (regex);
if (!g_regex_match_full (regex, pco_info, strlen (pco_info), 0, 0, &match_info, error))
return NULL;
num_matches = g_match_info_get_match_count (match_info);
if (num_matches != 5) {
g_set_error (error,
MM_CORE_ERROR,
MM_CORE_ERROR_FAILED,
"Failed to parse substrings, number of matches: %d",
num_matches);
return NULL;
}
while (g_match_info_matches (match_info)) {
guint pco_cid;
g_autofree gchar *pco_id = NULL;
g_autofree gchar *pco_payload = NULL;
g_autofree guint8 *pco_payload_bytes = NULL;
gsize pco_payload_bytes_len;
guint8 pco_prefix[6];
GByteArray *pco_raw;
gsize pco_raw_len;
if (!mm_get_uint_from_match_info (match_info, 1, &pco_cid)) {
g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
"Couldn't parse CID from PCO info: '%s'", pco_info);
break;
}
/* We are only interested in IMS and Internet PDN PCO. */
if (pco_cid != MM_ALTAIR_IMS_PDN_CID && pco_cid != MM_ALTAIR_INTERNET_PDN_CID) {
g_match_info_next (match_info, error);
continue;
}
pco_id = mm_get_string_unquoted_from_match_info (match_info, 3);
if (!pco_id) {
g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
"Couldn't parse PCO ID from PCO info: '%s'", pco_info);
break;
}
if (g_strcmp0 (pco_id, "FF00")) {
g_match_info_next (match_info, error);
continue;
}
pco_payload = mm_get_string_unquoted_from_match_info (match_info, 4);
if (!pco_payload) {
g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
"Couldn't parse PCO payload from PCO info: '%s'", pco_info);
break;
}
pco_payload_bytes = mm_utils_hexstr2bin (pco_payload, -1, &pco_payload_bytes_len, error);
if (!pco_payload_bytes) {
g_prefix_error (error, "Invalid PCO payload from PCO info '%s': ", pco_info);
break;
}
/* Protocol Configuration Options (PCO) is an information element with an
* identifier (IEI) 0x27 and contains between 3 and 253 octets. See 3GPP TS
* 24.008 for more details on PCO.
*
* NOTE: The standard uses one-based indexing, but to better correlate to the
* code, zero-based indexing is used in the description hereinafter.
*
* Octet | Value
* --------+--------------------------------------------
* 0 | PCO IEI (= 0x27)
* 1 | Length of PCO contents (= total length - 2)
* 2 | bit 7 : ext
* | bit 6 to 3 : spare (= 0b0000)
* | bit 2 to 0 : Configuration protocol
* 3 to 4 | Element 1 ID
* 5 | Length of element 1 contents
* 6 to m | Element 1 contents
* ... |
*/
pco_raw_len = sizeof (pco_prefix) + pco_payload_bytes_len;
pco_prefix[0] = 0x27;
pco_prefix[1] = pco_raw_len - 2;
pco_prefix[2] = 0x80;
/* Verizon uses element ID 0xFF00 for carrier-specific PCO content. */
pco_prefix[3] = 0xFF;
pco_prefix[4] = 0x00;
pco_prefix[5] = pco_payload_bytes_len;
pco_raw = g_byte_array_sized_new (pco_raw_len);
g_byte_array_append (pco_raw, pco_prefix, sizeof (pco_prefix));
g_byte_array_append (pco_raw, pco_payload_bytes, pco_payload_bytes_len);
pco = mm_pco_new ();
mm_pco_set_session_id (pco, pco_cid);
mm_pco_set_complete (pco, TRUE);
mm_pco_set_data (pco, pco_raw->data, pco_raw->len);
break;
}
return pco;
}
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