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clients use optimistic data when reaching hidden services

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Allow clients to use optimistic data when connecting to a hidden service,
which should cut out the initial round-trip for client-side programs
including Tor Browser.

(Now that Tor 0.2.2.x is obsolete, all hidden services should support
server-side optimistic data.)

See proposal 181 for details. Implements ticket 13211.
This commit is contained in:
Roger Dingledine 2014-09-21 20:02:12 -04:00
parent 530fac10aa
commit 09183dc315
3 changed files with 14 additions and 4 deletions
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6
changes/feature13211 Normal file
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@ -0,0 +1,6 @@
o Major features (performance):
- Allow clients to use optimistic data when connecting to a hidden
service, which should cut out the initial round-trip for client-side
programs including Tor Browser. (Now that Tor 0.2.2.x is obsolete,
all hidden services should support server-side optimistic
data.) See proposal 181 for details. Implements ticket 13211.

9
src/or/circuituse.c
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@ -2110,14 +2110,17 @@ link_apconn_to_circ(entry_connection_t *apconn, origin_circuit_t *circ,
/* See if we can use optimistic data on this circuit */ /* See if we can use optimistic data on this circuit */
if (optimistic_data_enabled() && if (optimistic_data_enabled() &&
circ->base_.purpose == CIRCUIT_PURPOSE_C_GENERAL) (circ->base_.purpose == CIRCUIT_PURPOSE_C_GENERAL ||
circ->base_.purpose == CIRCUIT_PURPOSE_C_REND_JOINED))
apconn->may_use_optimistic_data = 1; apconn->may_use_optimistic_data = 1;
else else
apconn->may_use_optimistic_data = 0; apconn->may_use_optimistic_data = 0;
log_info(LD_APP, "Looks like completed circuit to %s %s allow " log_info(LD_APP, "Looks like completed circuit to %s %s allow "
"optimistic data for connection to %s", "optimistic data for connection to %s",
/* node_describe() does the right thing if exitnode is NULL */ circ->base_.purpose == CIRCUIT_PURPOSE_C_GENERAL ?
safe_str_client(node_describe(exitnode)), /* node_describe() does the right thing if exitnode is NULL */
safe_str_client(node_describe(exitnode)) :
"hidden service",
apconn->may_use_optimistic_data ? "does" : "doesn't", apconn->may_use_optimistic_data ? "does" : "doesn't",
safe_str_client(apconn->socks_request->address)); safe_str_client(apconn->socks_request->address));
} }

3
src/or/connection_edge.c
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@ -1767,7 +1767,8 @@ connection_ap_supports_optimistic_data(const entry_connection_t *conn)
general circuit. */ general circuit. */
if (edge_conn->on_circuit == NULL || if (edge_conn->on_circuit == NULL ||
edge_conn->on_circuit->state != CIRCUIT_STATE_OPEN || edge_conn->on_circuit->state != CIRCUIT_STATE_OPEN ||
edge_conn->on_circuit->purpose != CIRCUIT_PURPOSE_C_GENERAL) (edge_conn->on_circuit->purpose != CIRCUIT_PURPOSE_C_GENERAL &&
edge_conn->on_circuit->purpose != CIRCUIT_PURPOSE_C_REND_JOINED))
return 0; return 0;
return conn->may_use_optimistic_data; return conn->may_use_optimistic_data;