Extract Packet Fields from Byte Stream

#include <stdio.h>
#include <stdint.h>

typedef struct {
    uint8_t start;
    uint8_t command;
    uint16_t data;
    uint8_t crc;
    uint8_t end;
} Packet;

void print_packet_fields(uint8_t *buffer) {
    // Overlay struct and print values
    
    uint16_t data_top = 0;
    uint16_t data_bottom = 0;  
    data_top = buffer[2]; 
    data_bottom = buffer[3] << 8;
    int total = data_top | data_bottom; 
    
    printf("Start: %d\n", buffer[0]); 
    printf("Command: %d\n", buffer[1]); 
    printf("Data: %d\n", total); 
    printf("CRC: %d\n", buffer[4]); 
    printf("End: %d\n", buffer[5]); 

}

int main() {
    uint8_t buffer[6];
    for (int i = 0; i < 6; i++) {
        scanf("%hhu", &buffer[i]);
    }
    print_packet_fields(buffer);
    return 0;
}