Network package should pass serialized payload

[phckopper]

Currently, we use bare fields in our network packages

wakeUP_Computer/structs.h

Lines 12 to 20 in 345abc1

	typedef struct __packet{
	uint16_t type; //Tipo do pacote (p.ex. DATA | CMD)
	uint16_t seqn; //Número de sequência
	uint16_t length; //Comprimento do payload
	uint16_t timestamp; // Timestamp do dado
	char mac_address[18];
	int status;
	const char* _payload; //Dados da mensagem
	} packet;

We should start serializing our payloads into the payload field and stop using extra parameters in that struct.

[brendaschussler]

unsigned char *serialize_struct(participant *data)
{
// Alocate memory for all fields in the struct
unsigned char *buffer = (unsigned char *)malloc(sizeof(char) * 256 + sizeof(char) * 16 + sizeof(char) * 18 + sizeof(int));
memcpy(buffer, &data->hostname, sizeof(char) * 256);
memcpy(buffer + sizeof(char) * 256, data->ip_address, sizeof(char) * 16);
memcpy(buffer + sizeof(char) * 256 + sizeof(char) * 16, &data->mac_address, sizeof(char) * 18);
memcpy(buffer + sizeof(char) * 256 + sizeof(char) * 16 + sizeof(char) * 18, &data->status, sizeof(int));
return buffer;
}

participant *deserialize_struct(unsigned char *buffer)
{
participant *data = (participant *)malloc(sizeof(participant));
memcpy(&data->hostname, buffer, sizeof(char) * 256);
memcpy(data->ip_address, buffer + sizeof(char) * 256, sizeof(char) * 16);
memcpy(&data->mac_address, buffer + sizeof(char) * 256 + sizeof(char) * 16, sizeof(char) * 18);
memcpy(&data->status, buffer + sizeof(char) * 256 + sizeof(char) * 16 + sizeof(char) * 18, sizeof(int));
return data;
}