int tcplen; /* length of incoming TCPpacket */
int allow_request; /* defined if there's only one request possible */
time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
+ time_t last_key_renewal; /* last time we renewed the SPTPS key */
struct outgoing_t *outgoing; /* used to keep track of outgoing connections */