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Add new circuit purposes for hsdir activity.

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This lets us control their path len and usage.
This commit is contained in:
Mike Perry 2017-12-02 02:28:16 +00:00
parent 20a3f61105
commit 86ee771c28
5 changed files with 113 additions and 21 deletions
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13
src/or/circuitbuild.c
View File

@ -1662,11 +1662,14 @@ route_len_for_purpose(uint8_t purpose, extend_info_t *exit_ei)
if (circuit_should_use_vanguards(purpose)) {
/* Clients want an extra hop for rends to avoid linkability.
* Services want it for intro points to avoid publishing their
* layer3 guards.
* layer3 guards. They want it for hsdir posts to use
* their full layer3 guard set for those connections.
* Ex: C - G - L2 - L3 - R
* S - G - L2 - L3 - HSDIR
* S - G - L2 - L3 - I
*/
if (purpose == CIRCUIT_PURPOSE_C_ESTABLISH_REND ||
purpose == CIRCUIT_PURPOSE_S_HSDIR_POST ||
purpose == CIRCUIT_PURPOSE_S_ESTABLISH_INTRO)
return routelen+1;
@ -1683,9 +1686,11 @@ route_len_for_purpose(uint8_t purpose, extend_info_t *exit_ei)
* Same goes for intro points. Note that the route len
* includes the intro point or hsdir, hence the +2.
* Ex: C - G - L2 - L3 - M - I
* C - G - L2 - L3 - M - HSDIR
* S - G - L2 - L3 - M - R
*/
if (purpose == CIRCUIT_PURPOSE_S_CONNECT_REND ||
purpose == CIRCUIT_PURPOSE_C_HSDIR_GET ||
purpose == CIRCUIT_PURPOSE_C_INTRODUCING)
return routelen+2;
}
@ -1706,6 +1711,8 @@ route_len_for_purpose(uint8_t purpose, extend_info_t *exit_ei)
/* These three purposes connect to a router that someone else
* might have chosen, so add an extra hop to protect anonymity. */
case CIRCUIT_PURPOSE_C_GENERAL:
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_S_HSDIR_POST:
/* connecting to hidden service directory */
case CIRCUIT_PURPOSE_C_INTRODUCING:
/* client connecting to introduction point */
@ -2271,6 +2278,8 @@ choose_good_exit_server(uint8_t purpose,
flags |= CRN_RENDEZVOUS_V3;
switch (purpose) {
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_S_HSDIR_POST:
case CIRCUIT_PURPOSE_C_GENERAL:
if (is_internal) /* pick it like a middle hop */
return router_choose_random_node(NULL, options->ExcludeNodes, flags);
@ -2315,6 +2324,8 @@ warn_if_last_router_excluded(origin_circuit_t *circ,
(int)purpose,
circuit_purpose_to_string(purpose));
return;
case CIRCUIT_PURPOSE_S_HSDIR_POST:
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_C_GENERAL:
if (circ->build_state->is_internal)
return;

14
src/or/circuitlist.c
View File

@ -689,6 +689,10 @@ circuit_purpose_to_controller_string(uint8_t purpose)
case CIRCUIT_PURPOSE_C_GENERAL:
return "GENERAL";
case CIRCUIT_PURPOSE_C_HSDIR_GET:
return "HS_CLIENT_HSDIR";
case CIRCUIT_PURPOSE_C_INTRODUCING:
case CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT:
case CIRCUIT_PURPOSE_C_INTRODUCE_ACKED:
@ -700,6 +704,9 @@ circuit_purpose_to_controller_string(uint8_t purpose)
case CIRCUIT_PURPOSE_C_REND_JOINED:
return "HS_CLIENT_REND";
case CIRCUIT_PURPOSE_S_HSDIR_POST:
return "HS_SERVICE_HSDIR";
case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO:
case CIRCUIT_PURPOSE_S_INTRO:
return "HS_SERVICE_INTRO";
@ -753,6 +760,7 @@ circuit_purpose_to_controller_hs_state_string(uint8_t purpose)
case CIRCUIT_PURPOSE_REND_ESTABLISHED:
return "OR_HS_R_JOINED";
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_C_INTRODUCING:
return "HSCI_CONNECTING";
case CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT:
@ -769,6 +777,7 @@ circuit_purpose_to_controller_hs_state_string(uint8_t purpose)
case CIRCUIT_PURPOSE_C_REND_JOINED:
return "HSCR_JOINED";
case CIRCUIT_PURPOSE_S_HSDIR_POST:
case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO:
return "HSSI_CONNECTING";
case CIRCUIT_PURPOSE_S_INTRO:
@ -813,6 +822,9 @@ circuit_purpose_to_string(uint8_t purpose)
return "Hidden service client: Pending rendezvous point (ack received)";
case CIRCUIT_PURPOSE_C_REND_JOINED:
return "Hidden service client: Active rendezvous point";
case CIRCUIT_PURPOSE_C_HSDIR_GET:
return "Hidden service client: Fetching HS descriptor";
case CIRCUIT_PURPOSE_C_MEASURE_TIMEOUT:
return "Measuring circuit timeout";
@ -824,6 +836,8 @@ circuit_purpose_to_string(uint8_t purpose)
return "Hidden service: Connecting to rendezvous point";
case CIRCUIT_PURPOSE_S_REND_JOINED:
return "Hidden service: Active rendezvous point";
case CIRCUIT_PURPOSE_S_HSDIR_POST:
return "Hidden service: Uploading HS descriptor";
case CIRCUIT_PURPOSE_TESTING:
return "Testing circuit";

76
src/or/circuituse.c
View File

@ -156,7 +156,9 @@ circuit_is_acceptable(const origin_circuit_t *origin_circ,
if (need_internal != build_state->is_internal)
return 0;
if (purpose == CIRCUIT_PURPOSE_C_GENERAL) {
if (purpose == CIRCUIT_PURPOSE_C_GENERAL ||
purpose == CIRCUIT_PURPOSE_S_HSDIR_POST ||
purpose == CIRCUIT_PURPOSE_C_HSDIR_GET) {
tor_addr_t addr;
const int family = tor_addr_parse(&addr, conn->socks_request->address);
if (!exitnode && !build_state->onehop_tunnel) {
@ -238,6 +240,8 @@ circuit_is_better(const origin_circuit_t *oa, const origin_circuit_t *ob,
return 1; /* oa is better. It's not relaxed. */
switch (purpose) {
case CIRCUIT_PURPOSE_S_HSDIR_POST:
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_C_GENERAL:
/* if it's used but less dirty it's best;
* else if it's more recently created it's best
@ -323,6 +327,8 @@ circuit_get_best(const entry_connection_t *conn,
tor_assert(conn);
tor_assert(purpose == CIRCUIT_PURPOSE_C_GENERAL ||
purpose == CIRCUIT_PURPOSE_C_HSDIR_GET ||
purpose == CIRCUIT_PURPOSE_S_HSDIR_POST ||
purpose == CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT ||
purpose == CIRCUIT_PURPOSE_C_REND_JOINED);
@ -1458,6 +1464,8 @@ circuit_expire_old_circuits_clientside(void)
} else if (!circ->timestamp_dirty && circ->state == CIRCUIT_STATE_OPEN) {
if (timercmp(&circ->timestamp_began, &cutoff, OP_LT)) {
if (circ->purpose == CIRCUIT_PURPOSE_C_GENERAL ||
circ->purpose == CIRCUIT_PURPOSE_C_HSDIR_GET ||
circ->purpose == CIRCUIT_PURPOSE_S_HSDIR_POST ||
circ->purpose == CIRCUIT_PURPOSE_C_MEASURE_TIMEOUT ||
circ->purpose == CIRCUIT_PURPOSE_S_ESTABLISH_INTRO ||
circ->purpose == CIRCUIT_PURPOSE_TESTING ||
@ -1650,6 +1658,8 @@ circuit_has_opened(origin_circuit_t *circ)
hs_client_circuit_has_opened(circ);
break;
case CIRCUIT_PURPOSE_C_GENERAL:
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_S_HSDIR_POST:
/* Tell any AP connections that have been waiting for a new
* circuit that one is ready. */
circuit_try_attaching_streams(circ);
@ -1786,6 +1796,8 @@ circuit_build_failed(origin_circuit_t *circ)
}
switch (circ->base_.purpose) {
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_S_HSDIR_POST:
case CIRCUIT_PURPOSE_C_GENERAL:
/* If we never built the circuit, note it as a failure. */
circuit_increment_failure_count();
@ -1877,14 +1889,14 @@ int
circuit_purpose_is_hidden_service(uint8_t purpose)
{
/* Client-side purpose */
if (purpose >= CIRCUIT_PURPOSE_C_INTRODUCING &&
purpose <= CIRCUIT_PURPOSE_C_REND_JOINED) {
if (purpose >= CIRCUIT_PURPOSE_C_HS_MIN_ &&
purpose <= CIRCUIT_PURPOSE_C_HS_MAX_) {
return 1;
}
/* Service-side purpose */
if (purpose >= CIRCUIT_PURPOSE_S_ESTABLISH_INTRO &&
purpose <= CIRCUIT_PURPOSE_S_REND_JOINED) {
if (purpose >= CIRCUIT_PURPOSE_S_HS_MIN_ &&
purpose <= CIRCUIT_PURPOSE_S_HS_MAX_) {
return 1;
}
@ -2009,6 +2021,8 @@ circuit_launch_by_extend_info(uint8_t purpose,
case CIRCUIT_PURPOSE_C_INTRODUCING:
case CIRCUIT_PURPOSE_S_CONNECT_REND:
case CIRCUIT_PURPOSE_C_GENERAL:
case CIRCUIT_PURPOSE_S_HSDIR_POST:
case CIRCUIT_PURPOSE_C_HSDIR_GET:
case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO:
/* need to add a new hop */
tor_assert(extend_info);
@ -2273,7 +2287,9 @@ circuit_get_open_circ_or_launch(entry_connection_t *conn,
/* If we have specified a particular exit node for our
* connection, then be sure to open a circuit to that exit node.
*/
if (desired_circuit_purpose == CIRCUIT_PURPOSE_C_GENERAL) {
if (desired_circuit_purpose == CIRCUIT_PURPOSE_C_GENERAL ||
desired_circuit_purpose == CIRCUIT_PURPOSE_S_HSDIR_POST ||
desired_circuit_purpose == CIRCUIT_PURPOSE_C_HSDIR_GET) {
if (conn->chosen_exit_name) {
const node_t *r;
int opt = conn->chosen_exit_optional;
@ -2381,7 +2397,9 @@ circuit_get_open_circ_or_launch(entry_connection_t *conn,
/* Now trigger things that need to happen when we launch circuits */
if (desired_circuit_purpose == CIRCUIT_PURPOSE_C_GENERAL) {
if (desired_circuit_purpose == CIRCUIT_PURPOSE_C_GENERAL ||
desired_circuit_purpose == CIRCUIT_PURPOSE_C_HSDIR_GET ||
desired_circuit_purpose == CIRCUIT_PURPOSE_S_HSDIR_POST) {
/* We just caused a circuit to get built because of this stream.
* If this stream has caused a _lot_ of circuits to be built, that's
* a bad sign: we should tell the user. */
@ -2510,6 +2528,8 @@ link_apconn_to_circ(entry_connection_t *apconn, origin_circuit_t *circ,
/* See if we can use optimistic data on this circuit */
if (optimistic_data_enabled() &&
(circ->base_.purpose == CIRCUIT_PURPOSE_C_GENERAL ||
circ->base_.purpose == CIRCUIT_PURPOSE_C_HSDIR_GET ||
circ->base_.purpose == CIRCUIT_PURPOSE_S_HSDIR_POST ||
circ->base_.purpose == CIRCUIT_PURPOSE_C_REND_JOINED))
apconn->may_use_optimistic_data = 1;
else
@ -2630,6 +2650,39 @@ connection_ap_handshake_attach_chosen_circuit(entry_connection_t *conn,
return 1;
}
/**
* Return an appropriate circuit purpose for non-rend streams.
* We don't handle rends here because a rend stream triggers two
* circuit builds with different purposes, so it is handled elsewhere.
*
* This function just figures out what type of hsdir activity this is,
* and tells us. Everything else is general.
*/
static int
connection_ap_get_nonrend_circ_purpose(const entry_connection_t *conn)
{
const connection_t *base_conn = ENTRY_TO_CONN(conn);
tor_assert_nonfatal(!connection_edge_is_rendezvous_stream(
ENTRY_TO_EDGE_CONN(conn)));
if (base_conn->linked_conn &&
base_conn->linked_conn->type == CONN_TYPE_DIR) {
/* Set a custom purpose for hsdir activity */
if (base_conn->linked_conn->purpose == DIR_PURPOSE_UPLOAD_RENDDESC_V2 ||
base_conn->linked_conn->purpose == DIR_PURPOSE_UPLOAD_HSDESC) {
return CIRCUIT_PURPOSE_S_HSDIR_POST;
} else if (base_conn->linked_conn->purpose
== DIR_PURPOSE_FETCH_RENDDESC_V2 ||
base_conn->linked_conn->purpose
== DIR_PURPOSE_FETCH_HSDESC) {
return CIRCUIT_PURPOSE_C_HSDIR_GET;
}
}
/* All other purposes are general for now */
return CIRCUIT_PURPOSE_C_GENERAL;
}
/** Try to find a safe live circuit for stream <b>conn</b>. If we find one,
* attach the stream, send appropriate cells, and return 1. Otherwise,
* try to launch new circuit(s) for the stream. If we can launch
@ -2728,9 +2781,12 @@ connection_ap_handshake_attach_circuit(entry_connection_t *conn)
}
/* Find the circuit that we should use, if there is one. Otherwise
* launch it. */
retval = circuit_get_open_circ_or_launch(
conn, CIRCUIT_PURPOSE_C_GENERAL, &circ);
* launch it
*/
retval = circuit_get_open_circ_or_launch(conn,
connection_ap_get_nonrend_circ_purpose(conn),
&circ);
if (retval < 1) {
/* We were either told "-1" (complete failure) or 0 (circuit in
* progress); we can't attach this stream yet. */

2
src/or/connection_edge.c
View File

@ -2592,6 +2592,8 @@ connection_ap_supports_optimistic_data(const entry_connection_t *conn)
if (edge_conn->on_circuit == NULL ||
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_HSDIR_GET &&
edge_conn->on_circuit->purpose != CIRCUIT_PURPOSE_S_HSDIR_POST &&
edge_conn->on_circuit->purpose != CIRCUIT_PURPOSE_C_REND_JOINED))
return 0;

29
src/or/or.h
View File

@ -506,6 +506,7 @@ typedef enum {
*/
/** Client-side circuit purpose: Normal circuit, with cpath. */
#define CIRCUIT_PURPOSE_C_GENERAL 5
#define CIRCUIT_PURPOSE_C_HS_MIN_ 6
/** Client-side circuit purpose: at the client, connecting to intro point. */
#define CIRCUIT_PURPOSE_C_INTRODUCING 6
/** Client-side circuit purpose: at the client, sent INTRODUCE1 to intro point,
@ -523,28 +524,36 @@ typedef enum {
#define CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED 11
/** Client-side circuit purpose: at the client, rendezvous established. */
#define CIRCUIT_PURPOSE_C_REND_JOINED 12
/** This circuit is used for getting hsdirs */
#define CIRCUIT_PURPOSE_C_HSDIR_GET 13
#define CIRCUIT_PURPOSE_C_HS_MAX_ 13
/** This circuit is used for build time measurement only */
#define CIRCUIT_PURPOSE_C_MEASURE_TIMEOUT 13
#define CIRCUIT_PURPOSE_C_MAX_ 13
#define CIRCUIT_PURPOSE_C_MEASURE_TIMEOUT 14
#define CIRCUIT_PURPOSE_C_MAX_ 14
#define CIRCUIT_PURPOSE_S_HS_MIN_ 15
/** Hidden-service-side circuit purpose: at the service, waiting for
* introductions. */
#define CIRCUIT_PURPOSE_S_ESTABLISH_INTRO 14
#define CIRCUIT_PURPOSE_S_ESTABLISH_INTRO 15
/** Hidden-service-side circuit purpose: at the service, successfully
* established intro. */
#define CIRCUIT_PURPOSE_S_INTRO 15
#define CIRCUIT_PURPOSE_S_INTRO 16
/** Hidden-service-side circuit purpose: at the service, connecting to rend
* point. */
#define CIRCUIT_PURPOSE_S_CONNECT_REND 16
#define CIRCUIT_PURPOSE_S_CONNECT_REND 17
/** Hidden-service-side circuit purpose: at the service, rendezvous
* established. */
#define CIRCUIT_PURPOSE_S_REND_JOINED 17
#define CIRCUIT_PURPOSE_S_REND_JOINED 18
/** This circuit is used for uploading hsdirs */
#define CIRCUIT_PURPOSE_S_HSDIR_POST 19
#define CIRCUIT_PURPOSE_S_HS_MAX_ 19
/** A testing circuit; not meant to be used for actual traffic. */
#define CIRCUIT_PURPOSE_TESTING 18
#define CIRCUIT_PURPOSE_TESTING 20
/** A controller made this circuit and Tor should not use it. */
#define CIRCUIT_PURPOSE_CONTROLLER 19
#define CIRCUIT_PURPOSE_CONTROLLER 21
/** This circuit is used for path bias probing only */
#define CIRCUIT_PURPOSE_PATH_BIAS_TESTING 20
#define CIRCUIT_PURPOSE_MAX_ 20
#define CIRCUIT_PURPOSE_PATH_BIAS_TESTING 22
#define CIRCUIT_PURPOSE_MAX_ 22
/** A catch-all for unrecognized purposes. Currently we don't expect
* to make or see any circuits with this purpose. */
#define CIRCUIT_PURPOSE_UNKNOWN 255