data.c

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/* Copyright 2021 The libwifi Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include "data.h"
 
#include <errno.h>
#include <stdlib.h>
#include <string.h>
 
int libwifi_parse_data(struct libwifi_data *data, struct libwifi_frame *frame) {
    if (frame->frame_control.type != TYPE_DATA) {
        return -EINVAL;
    }
 
    if (frame->flags & LIBWIFI_FLAGS_IS_QOS) {
        memcpy(data->receiver, frame->header.data_qos.addr1, 6);
        memcpy(data->transmitter, frame->header.data_qos.addr2, 6);
    } else {
        memcpy(data->receiver, frame->header.data.addr1, 6);
        memcpy(data->transmitter, frame->header.data.addr2, 6);
    }
 
    data->body_len = frame->len - frame->header_len;
 
    data->body = malloc(data->body_len);
    if (data->body == NULL) {
        return -ENOMEM;
    }
    memcpy(frame->body, data->body, data->body_len);
 
    return 0;
}
 
void libwifi_free_data(struct libwifi_data *data) {
    free(data->body);
}