diff options
Diffstat (limited to 'src/trunnel/circpad_negotiation.h')
| -rw-r--r-- | src/trunnel/circpad_negotiation.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/trunnel/circpad_negotiation.h b/src/trunnel/circpad_negotiation.h index ba9155019e..9004540d43 100644 --- a/src/trunnel/circpad_negotiation.h +++ b/src/trunnel/circpad_negotiation.h @@ -26,6 +26,7 @@ struct circpad_negotiate_st { uint8_t machine_type; /** If true, send a relay_drop reply.. */ uint8_t echo_request; + uint32_t machine_ctr; uint8_t trunnel_error_code_; }; #endif @@ -42,6 +43,14 @@ struct circpad_negotiated_st { /** Machine type is left unbounded because we can specify * new machines in the consensus */ uint8_t machine_type; + /** + * This field is used for shutdown synchronization. It is OK if + * it wraps, because all we need to do is make sure the STOP + * command is actually for the currently active machine. + * For backward-compatibility, though, 0 has special meaning + * (it means match any machine). + */ + uint32_t machine_ctr; uint8_t trunnel_error_code_; }; #endif @@ -118,6 +127,15 @@ uint8_t circpad_negotiate_get_echo_request(const circpad_negotiate_t *inp); * code on 'inp' on failure. */ int circpad_negotiate_set_echo_request(circpad_negotiate_t *inp, uint8_t val); +/** Return the value of the machine_ctr field of the + * circpad_negotiate_t in 'inp' + */ +uint32_t circpad_negotiate_get_machine_ctr(const circpad_negotiate_t *inp); +/** Set the value of the machine_ctr field of the circpad_negotiate_t + * in 'inp' to 'val'. Return 0 on success; return -1 and set the error + * code on 'inp' on failure. + */ +int circpad_negotiate_set_machine_ctr(circpad_negotiate_t *inp, uint32_t val); /** Return a newly allocated circpad_negotiated with all elements set * to zero. */ @@ -190,6 +208,15 @@ uint8_t circpad_negotiated_get_machine_type(const circpad_negotiated_t *inp); * -1 and set the error code on 'inp' on failure. */ int circpad_negotiated_set_machine_type(circpad_negotiated_t *inp, uint8_t val); +/** Return the value of the machine_ctr field of the + * circpad_negotiated_t in 'inp' + */ +uint32_t circpad_negotiated_get_machine_ctr(const circpad_negotiated_t *inp); +/** Set the value of the machine_ctr field of the circpad_negotiated_t + * in 'inp' to 'val'. Return 0 on success; return -1 and set the error + * code on 'inp' on failure. + */ +int circpad_negotiated_set_machine_ctr(circpad_negotiated_t *inp, uint32_t val); #endif |