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nickm wants us to prioritize tap in a currently-rare edge case

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This commit is contained in:
Roger Dingledine 2013-09-04 19:43:46 -04:00
parent 71e0ca02b5
commit c6f1668db3
1 changed files with 14 additions and 1 deletions
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15
src/or/onion.c
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@ -217,8 +217,21 @@ decide_next_handshake_type(void)
if (!ol_entries[ONION_HANDSHAKE_TYPE_NTOR])
return ONION_HANDSHAKE_TYPE_TAP; /* no ntors? try tap */
if (!ol_entries[ONION_HANDSHAKE_TYPE_TAP])
if (!ol_entries[ONION_HANDSHAKE_TYPE_TAP]) {
/* Nick wants us to prioritize new tap requests when there aren't
* any in the queue and we've processed k ntor cells since the last
* tap cell. This strategy is maybe a good idea, since it starves tap
* less in the case where tap is rare, or maybe a poor idea, since it
* makes the new tap cell unfairly jump in front of ntor cells that
* got here first. In any case this edge case will only become relevant
* once tap is rare. We should reevaluate whether we like this decision
* once tap gets more rare. */
if (ol_entries[ONION_HANDSHAKE_TYPE_NTOR])
++recently_chosen_ntors;
return ONION_HANDSHAKE_TYPE_NTOR; /* no taps? try ntor */
}
/* They both have something queued. Pick ntor if we haven't done that
* too much lately. */