mirror of git://git.sysmocom.de/ofono
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*
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*
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* oFono - Open Source Telephony
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*
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* Copyright (C) 2017 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdbool.h>
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#include <stdint.h>
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#include <stddef.h>
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#include "mbim-desc.h"
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/*
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* Attempts to find MBIM specific descriptors.
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*
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* Returns true if the MBIM Function descriptor was found, false otherwise.
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*/
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bool mbim_find_descriptors(const uint8_t *data, size_t data_len,
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const struct mbim_desc **out_desc,
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const struct mbim_extended_desc **out_ext_desc)
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{
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bool r = false;
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while (data_len > 3) {
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uint8_t len = data[0];
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if (data[1] != 0x24)
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goto next;
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/* MBIM v1.0, Table 4-3 */
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switch (data[2]) {
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case 0x1b:
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if (!out_desc)
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break;
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if (len != sizeof(struct mbim_desc) || data_len < len)
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break;
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*out_desc = (const struct mbim_desc *) data;
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r = true;
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break;
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case 0x1c:
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if (!out_ext_desc)
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break;
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if (len != sizeof(struct mbim_extended_desc) ||
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data_len < len)
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break;
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*out_ext_desc =
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(const struct mbim_extended_desc *) data;
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break;
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}
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next:
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data_len -= len;
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data += len;
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}
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return r;
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}
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