+ char *buffer; /* metadata input buffer */
+ int buflen; /* bytes read into buffer */
+ int reqlen; /* length of first request in buffer */
+ int tcppacket; /* length of incoming TCP tunnelled packet */
+ time_t last_ping_time; /* last time we saw some activity from the other end */
+ int want_ping; /* 0 if there's no need to check for activity */
+ int allow_request; /* defined if there's only one request possible */
+ char *chal_answer; /* answer to the given challenge */
+ enc_key_t *metakey;