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prop224: Add client-side rend circuit support to HS circuitmap
Signed-off-by: David Goulet <dgoulet@torproject.org>
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@ -5,8 +5,10 @@
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* \file hs_circuitmap.c
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*
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* \brief Hidden service circuitmap: A hash table that maps binary tokens to
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* introduction and rendezvous circuits; it's used both by relays acting as
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* intro points and rendezvous points, and also by hidden services themselves.
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* introduction and rendezvous circuits; it's used:
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* (a) by relays acting as intro points and rendezvous points
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* (b) by hidden services to find intro and rend circuits and
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* (c) by HS clients to find rendezvous circuits.
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**/
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#define HS_CIRCUITMAP_PRIVATE
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@ -404,6 +406,29 @@ hs_circuitmap_get_rend_circ_service_side(const uint8_t *cookie)
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return circ;
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}
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/* Public function: Return client-side rendezvous circuit with rendezvous
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* <b>cookie</b>. It will first lookup for the CIRCUIT_PURPOSE_C_REND_READY
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* purpose and then try for CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED.
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*
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* Return NULL if no such circuit is found in the circuitmap. */
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origin_circuit_t *
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hs_circuitmap_get_rend_circ_client_side(const uint8_t *cookie)
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{
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origin_circuit_t *circ = NULL;
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circ = hs_circuitmap_get_origin_circuit(HS_TOKEN_REND_CLIENT_SIDE,
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REND_TOKEN_LEN, cookie,
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CIRCUIT_PURPOSE_C_REND_READY);
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if (circ) {
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return circ;
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}
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circ = hs_circuitmap_get_origin_circuit(HS_TOKEN_REND_CLIENT_SIDE,
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REND_TOKEN_LEN, cookie,
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CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED);
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return circ;
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}
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/**** Public servide-side setters: */
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/* Public function: Register v2 intro circuit with key <b>digest</b> to the
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@ -439,6 +464,22 @@ hs_circuitmap_register_rend_circ_service_side(origin_circuit_t *circ,
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REND_TOKEN_LEN, cookie);
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}
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/* Public function: Register rendezvous circuit with key <b>cookie</b> to the
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* client-side circuitmap. */
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void
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hs_circuitmap_register_rend_circ_client_side(origin_circuit_t *or_circ,
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const uint8_t *cookie)
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{
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circuit_t *circ = TO_CIRCUIT(or_circ);
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{ /* Basic circ purpose sanity checking */
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tor_assert_nonfatal(circ->purpose == CIRCUIT_PURPOSE_C_REND_READY ||
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circ->purpose == CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED);
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}
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hs_circuitmap_register_circuit(circ, HS_TOKEN_REND_CLIENT_SIDE,
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REND_TOKEN_LEN, cookie);
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}
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/**** Misc public functions: */
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/** Public function: Remove this circuit from the HS circuitmap. Clear its HS
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@ -43,6 +43,8 @@ struct origin_circuit_t *
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hs_circuitmap_get_intro_circ_v2_service_side(const uint8_t *digest);
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struct origin_circuit_t *
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hs_circuitmap_get_rend_circ_service_side(const uint8_t *cookie);
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struct origin_circuit_t *
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hs_circuitmap_get_rend_circ_client_side(const uint8_t *cookie);
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void hs_circuitmap_register_intro_circ_v2_service_side(
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struct origin_circuit_t *circ,
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@ -53,6 +55,9 @@ void hs_circuitmap_register_intro_circ_v3_service_side(
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void hs_circuitmap_register_rend_circ_service_side(
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struct origin_circuit_t *circ,
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const uint8_t *cookie);
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void hs_circuitmap_register_rend_circ_client_side(
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struct origin_circuit_t *circ,
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const uint8_t *cookie);
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void hs_circuitmap_remove_circuit(struct circuit_t *circ);
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@ -76,6 +81,9 @@ typedef enum {
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HS_TOKEN_INTRO_V2_SERVICE_SIDE,
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/** A v3 introduction point pubkey on a hidden service (256bit) */
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HS_TOKEN_INTRO_V3_SERVICE_SIDE,
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/** A rendezvous cookie on the client side (128bit) */
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HS_TOKEN_REND_CLIENT_SIDE,
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} hs_token_type_t;
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/** Represents a token used in the HS protocol. Each such token maps to a
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@ -180,6 +180,7 @@ static void
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test_rend_token_maps(void *arg)
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{
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or_circuit_t *c1, *c2, *c3, *c4;
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origin_circuit_t *c5;
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const uint8_t tok1[REND_TOKEN_LEN] = "The cat can't tell y";
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const uint8_t tok2[REND_TOKEN_LEN] = "ou its name, and it ";
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const uint8_t tok3[REND_TOKEN_LEN] = "doesn't really care.";
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@ -194,6 +195,7 @@ test_rend_token_maps(void *arg)
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c2 = or_circuit_new(0, NULL);
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c3 = or_circuit_new(0, NULL);
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c4 = or_circuit_new(0, NULL);
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c5 = origin_circuit_new();
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/* Make sure we really filled up the tok* variables */
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tt_int_op(tok1[REND_TOKEN_LEN-1], OP_EQ, 'y');
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@ -264,6 +266,13 @@ test_rend_token_maps(void *arg)
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tt_ptr_op(TO_CIRCUIT(c4)->hs_token, OP_EQ, NULL);
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tt_ptr_op(NULL, OP_EQ, hs_circuitmap_get_intro_circ_v2_relay_side(tok3));
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/* Now let's do a check for the client-side rend circuitmap */
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c5->base_.purpose = CIRCUIT_PURPOSE_C_REND_READY;
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hs_circuitmap_register_rend_circ_client_side(c5, tok1);
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tt_ptr_op(c5, OP_EQ, hs_circuitmap_get_rend_circ_client_side(tok1));
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tt_ptr_op(NULL, OP_EQ, hs_circuitmap_get_rend_circ_client_side(tok2));
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done:
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if (c1)
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circuit_free(TO_CIRCUIT(c1));
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@ -273,6 +282,8 @@ test_rend_token_maps(void *arg)
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circuit_free(TO_CIRCUIT(c3));
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if (c4)
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circuit_free(TO_CIRCUIT(c4));
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if (c5)
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circuit_free(TO_CIRCUIT(c5));
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}
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static void
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