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Ignore one-hop circuits for circuit timeout calc

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Don't count one-hop circuits when we're estimating how long it
takes circuits to build on average. Otherwise we'll set our circuit
build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
This commit is contained in:
Roger Dingledine 2009-10-01 04:15:45 -04:00
parent b9e8f0a013
commit 9325b9269c
2 changed files with 22 additions and 19 deletions
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4
ChangeLog
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@ -32,6 +32,10 @@ Changes in version 0.2.2.4-alpha - 2009-??-??
circuit_build_times_parse_state. Bugfix on 0.2.2.2-alpha.
- Make it explicit that we can't overflow in
connection_ap_handshake_send_resolve. Bugfix on 0.0.7.1-1.
- Don't count one-hop circuits when we're estimating how long it
takes circuits to build on average. Otherwise we'll set our circuit
build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
Changes in version 0.2.2.3-alpha - 2009-09-23
o Major bugfixes:

37
src/or/circuitbuild.c
View File

@ -204,21 +204,18 @@ circuit_build_times_rewind_history(circuit_build_times_t *cbt, int n)
}
/**
* Add a timeoutout value to the set of build times. Time units
* are milliseconds
* Add a new timeout value <b>time</b> to the set of build times. Time
* units are milliseconds.
*
* circuit_build_times is a circular array, so loop around when
* circuit_build_times <b>cbt</a> is a circular array, so loop around when
* array is full.
*/
int
circuit_build_times_add_time(circuit_build_times_t *cbt, build_time_t time)
{
if (time > BUILD_TIME_MAX) {
log_notice(LD_CIRC,
"Circuit build time of %ums exceeds max. Capping at 65536ms", time);
time = BUILD_TIME_MAX;
} else if (time <= 0) {
log_err(LD_CIRC, "Circuit build time is %u!", time);
tor_assert(time <= BUILD_TIME_MAX);
if (time <= 0) {
log_warn(LD_CIRC, "Circuit build time is %u!", time);
return -1;
}
@ -627,10 +624,10 @@ circuit_build_times_add_timeout_worker(circuit_build_times_t *cbt,
"%ums vs %lfms using Xm: %d a: %lf, q: %lf",
gentime, cbt->timeout_ms, cbt->Xm, cbt->alpha, quantile_cutoff);
} else if (gentime > BUILD_TIME_MAX) {
gentime = BUILD_TIME_MAX;
log_info(LD_CIRC,
"Generated a synthetic timeout larger than the max: %u",
gentime);
gentime = BUILD_TIME_MAX;
} else {
log_info(LD_CIRC, "Generated synthetic circuit build time %u for timeout",
gentime);
@ -1506,17 +1503,19 @@ circuit_send_next_onion_skin(origin_circuit_t *circ)
log_debug(LD_CIRC,"starting to send subsequent skin.");
hop = onion_next_hop_in_cpath(circ->cpath);
if (!hop) {
struct timeval end;
long timediff;
tor_gettimeofday(&end);
timediff = tv_mdiff(&circ->_base.highres_created, &end);
if (timediff > INT32_MAX)
timediff = INT32_MAX;
/* done building the circuit. whew. */
circuit_set_state(TO_CIRCUIT(circ), CIRCUIT_STATE_OPEN);
circuit_build_times_add_time(&circ_times, (build_time_t)timediff);
circuit_build_times_network_circ_success(&circ_times);
circuit_build_times_set_timeout(&circ_times);
if (!circ->build_state->onehop_tunnel) {
struct timeval end;
long timediff;
tor_gettimeofday(&end);
timediff = tv_mdiff(&circ->_base.highres_created, &end);
if (timediff > BUILD_TIME_MAX)
timediff = BUILD_TIME_MAX;
circuit_build_times_add_time(&circ_times, (build_time_t)timediff);
circuit_build_times_network_circ_success(&circ_times);
circuit_build_times_set_timeout(&circ_times);
}
log_info(LD_CIRC,"circuit built!");
circuit_reset_failure_count(0);
if (circ->build_state->onehop_tunnel)