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#ifndef KV_PACKET_H
#define KV_PACKET_H
#define KV_PACKET_SIZE 512
#ifdef DEBUG
#define DEBUGF(fmt, ...) fprintf(stderr, "DEBUG: %s:%d:%s(): " fmt, __FILE__, __LINE__, __func__, ##__VA_ARGS__)
#else
#define DEBUGF(fmt, ...) \
do { } while (0)
#endif
enum system_operation {
keepalive = (int) 0x80000000, // -2^31
join_channel, // 1 - 2^31
leave_channel, // 2 - 2^31
acknowledgement, // 3 - 2^31
};
struct kv_packet {
int id;
unsigned char data[KV_PACKET_SIZE - sizeof(unsigned int)];
};
struct kv_system_packet {
// as in system_operation enum.
int operation_id;
// could be ignored
int user_id;
// calculated with system_packet_checksum function
unsigned int checksum;
unsigned char sentinel[KV_PACKET_SIZE - 3 * sizeof(int)];
};
unsigned int system_packet_checksum(struct kv_system_packet *packet);
int __user_cmp(const void* a, const void* b);
#endif // KV_PACKET_H
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