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Refactor legacy code to support hs_ident along with rend_data.

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The legacy HS circuit code uses rend_data to match between circuits and
streams. We refactor some of that code so that it understands hs_ident
as well which is used for prop224.
This commit is contained in:
George Kadianakis 2017-05-02 16:20:26 +03:00 committed by Nick Mathewson
parent 83249015c2
commit 0b2018a4d0
2 changed files with 40 additions and 8 deletions
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40
src/or/circuituse.c
View File

@ -42,6 +42,7 @@
#include "control.h" #include "control.h"
#include "entrynodes.h" #include "entrynodes.h"
#include "hs_common.h" #include "hs_common.h"
#include "hs_ident.h"
#include "nodelist.h" #include "nodelist.h"
#include "networkstatus.h" #include "networkstatus.h"
#include "policies.h" #include "policies.h"
@ -55,6 +56,36 @@
static void circuit_expire_old_circuits_clientside(void); static void circuit_expire_old_circuits_clientside(void);
static void circuit_increment_failure_count(void); static void circuit_increment_failure_count(void);
/** Check whether the hidden service destination of the stream at
* <b>edge_conn</b> is the same as the destination of the circuit at
* <b>origin_circ</b>. */
static int
circuit_matches_with_rend_stream(const edge_connection_t *edge_conn,
const origin_circuit_t *origin_circ)
{
/* Check if this is a v2 rendezvous circ/stream */
if ((edge_conn->rend_data && !origin_circ->rend_data) ||
(!edge_conn->rend_data && origin_circ->rend_data) ||
(edge_conn->rend_data && origin_circ->rend_data &&
rend_cmp_service_ids(rend_data_get_address(edge_conn->rend_data),
rend_data_get_address(origin_circ->rend_data)))) {
/* this circ is not for this conn */
return 0;
}
/* Check if this is a v3 rendezvous circ/stream */
if ((edge_conn->hs_ident && !origin_circ->hs_ident) ||
(!edge_conn->hs_ident && origin_circ->hs_ident) ||
(edge_conn->hs_ident && origin_circ->hs_ident &&
!ed25519_pubkey_eq(&edge_conn->hs_ident->identity_pk,
&origin_circ->hs_ident->identity_pk))) {
/* this circ is not for this conn */
return 0;
}
return 1;
}
/** Return 1 if <b>circ</b> could be returned by circuit_get_best(). /** Return 1 if <b>circ</b> could be returned by circuit_get_best().
* Else return 0. * Else return 0.
*/ */
@ -169,14 +200,9 @@ circuit_is_acceptable(const origin_circuit_t *origin_circ,
/* can't exit from this router */ /* can't exit from this router */
return 0; return 0;
} }
} else { /* not general */ } else { /* not general: this might be a rend circuit */
const edge_connection_t *edge_conn = ENTRY_TO_EDGE_CONN(conn); const edge_connection_t *edge_conn = ENTRY_TO_EDGE_CONN(conn);
if ((edge_conn->rend_data && !origin_circ->rend_data) || if (!circuit_matches_with_rend_stream(edge_conn, origin_circ)) {
(!edge_conn->rend_data && origin_circ->rend_data) ||
(edge_conn->rend_data && origin_circ->rend_data &&
rend_cmp_service_ids(rend_data_get_address(edge_conn->rend_data),
rend_data_get_address(origin_circ->rend_data)))) {
/* this circ is not for this conn */
return 0; return 0;
} }
} }

8
src/or/connection_edge.c
View File

@ -3566,8 +3566,14 @@ int
connection_edge_is_rendezvous_stream(const edge_connection_t *conn) connection_edge_is_rendezvous_stream(const edge_connection_t *conn)
{ {
tor_assert(conn); tor_assert(conn);
if (conn->rend_data)
if (BUG(conn->rend_data && conn->hs_ident)) {
log_warn(LD_BUG, "Connection has both rend_data and hs_ident...");
}
if (conn->rend_data || conn->hs_ident) {
return 1; return 1;
}
return 0; return 0;
} }