protocol.h

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#ifndef __PROTOCOL_H
#define __PROTOCOL_H

/* -- Includes -- */

/* -- Types -- */

typedef struct s_PROTOCOL_STRUCT
{
    int recv_id; // Receiver ID
    int send_id; // Sender ID
    int send_team; // Sender Team
    char type; // Packet type
    int send_time;
    int pkt_seqno; //Sequence number of the packet
    int pkt_seqid; //Sequence id of the packet.
    int seq_last_id; //The last id of the sequence
    char data_type; // Data type
    void *data; // Pointer to data structure

} protocol_t;

/* -- Constants -- */

/* Protocol Addresses */
#define s_PROTOCOL_ADDR_SERVER      0
#define s_PROTOCOL_ADDR_BROADCAST   99

/* Packet types */
#define s_PROTOCOL_TYPE_ACK         'a'
#define s_PROTOCOL_TYPE_DATA        'd'
#define s_PROTOCOL_TYPE_GO_AHEAD    'g'

/* -- Function Prototypes -- */
int protocol_encode(char *udp_packet,
                    int *len,
                    int recv_id,
                    int send_id,
                    int send_team,
                    char type,
                    int seqno,
                    int seqid,
                    int seq_lid,
                    int data_type,
                    void *data); // Encode data structure into string to be sent through UDP

/* Decode the data structure contanied in the udp packet */
int protocol_decode(protocol_t *packet, char *udp_packet, int len, int robot_id, int robot_team);



 #endif /* __PROTOCOL_H */