first guess at a set of circuit purposes

#define CIRCUIT_STATE_OR_WAIT 2 /* I'm the OP, my firsthop is still connecting */

#define CIRCUIT_STATE_OPEN 3 /* onionskin(s) processed, ready to send/receive cells */

#define _CIRCUIT_PURPOSE_MIN 1

/* these circuits were initiated elsewhere */

#define CIRCUIT_PURPOSE_INTERMEDIATE 1 /* normal circuit */

#define CIRCUIT_PURPOSE_INTRO_POINT 2 /* from Bob, waiting for intro from Alices */

#define CIRCUIT_PURPOSE_REND_POINT_WAITING 3 /* from Alice, waiting for Bob */

#define CIRCUIT_PURPOSE_REND_ESTABLISHED 4 /* both circuits have this purpose */

/* these circuits were initiated at this node */

#define CIRCUIT_PURPOSE_C_GENERAL 5 /* normal circuit, with cpath */

#define CIRCUIT_PURPOSE_S_ESTABLISH_INTRO 6 /* at Bob, waiting for introductions */

#define CIRCUIT_PURPOSE_C_INTRODUCING 7 /* at Alice, connecting to intro point */

#define CIRCUIT_PURPOSE_C_ESTABLISH_REND 8 /* at Alice, waiting for Bob */

#define CIRCUIT_PURPOSE_S_RENDEZVOUSING 9 /* at Bob, connecting to rend point */

#define CIRCUIT_PURPOSE_S_UPLOAD_SERVICE_DESC 10

#define CIRCUIT_PURPOSE_C_FETCH_SERVICE_DESC 11

#define _CIRCUIT_PURPOSE_MAX 11

#define RELAY_COMMAND_BEGIN 1

#define RELAY_COMMAND_DATA 2

#define RELAY_COMMAND_END 3