#define SPTPS_SIG 3 // Waiting for a SIGnature record
#define SPTPS_ACK 4 // Waiting for an ACKnowledgement record
+// Packet header sizes
+#define SPTPS_OVERHEAD 19
+#define SPTPS_DATAGRAM_OVERHEAD 21
+
typedef bool (*send_data_t)(void *handle, uint8_t type, const void *data, size_t len);
typedef bool (*receive_record_t)(void *handle, uint8_t type, const void *data, uint16_t len);
} sptps_t;
-extern void sptps_log_quiet(sptps_t *s, int s_errno, const char *format, va_list ap);
-extern void sptps_log_stderr(sptps_t *s, int s_errno, const char *format, va_list ap);
+void sptps_log_quiet(sptps_t *s, int s_errno, const char *format, va_list ap);
+void sptps_log_stderr(sptps_t *s, int s_errno, const char *format, va_list ap);
extern void (*sptps_log)(sptps_t *s, int s_errno, const char *format, va_list ap);
-extern bool sptps_start(sptps_t *s, void *handle, bool initiator, bool datagram, ecdsa_t *mykey, ecdsa_t *hiskey, const char *label, size_t labellen, send_data_t send_data, receive_record_t receive_record);
-extern bool sptps_stop(sptps_t *s);
-extern bool sptps_send_record(sptps_t *s, uint8_t type, const void *data, uint16_t len);
-extern bool sptps_receive_data(sptps_t *s, const void *data, size_t len);
-extern bool sptps_force_kex(sptps_t *s);
-extern bool sptps_verify_datagram(sptps_t *s, const void *data, size_t len);
+bool sptps_start(sptps_t *s, void *handle, bool initiator, bool datagram, ecdsa_t *mykey, ecdsa_t *hiskey, const char *label, size_t labellen, send_data_t send_data, receive_record_t receive_record) __attribute__((__warn_unused_result__));
+bool sptps_stop(sptps_t *s);
+bool sptps_send_record(sptps_t *s, uint8_t type, const void *data, uint16_t len);
+bool sptps_receive_data(sptps_t *s, const void *data, size_t len) __attribute__((__warn_unused_result__));
+bool sptps_force_kex(sptps_t *s) __attribute__((__warn_unused_result__));
+bool sptps_verify_datagram(sptps_t *s, const void *data, size_t len) __attribute__((__warn_unused_result__));
#endif