/** Try to tell a cpuworker to perform the public key operations necessary to
* respond to <b>onionskin</b> for the circuit <b>circ</b>.
*
* If <b>cpuworker</b> is defined, assert that he's idle, and use him. Else,
* look for an idle cpuworker and use him. If none idle, queue task onto the
* pending onion list and return. Return 0 if we successfully assign the
* task, or -1 on failure.
*/
int
assign_onionskin_to_cpuworker(connection_t *cpuworker,
or_circuit_t *circ, char *onionskin)
{
char qbuf[1];
char tag[TAG_LEN];
time_t now = approx_time();
static time_t last_culled_cpuworkers = 0;
/* Checking for wedged cpuworkers requires a linear search over all
* connections, so let's do it only once a minute.
*/
#define CULL_CPUWORKERS_INTERVAL 60
if (last_culled_cpuworkers + CULL_CPUWORKERS_INTERVAL <= now) {
cull_wedged_cpuworkers();
spawn_enough_cpuworkers();
last_culled_cpuworkers = now;
}
if (1) {
if (num_cpuworkers_busy == num_cpuworkers) {
log_debug(LD_OR,"No idle cpuworkers. Queuing.");
if (onion_pending_add(circ, onionskin) < 0) {
tor_free(onionskin);
return -1;
}
return 0;
}
if (!cpuworker)
cpuworker = connection_get_by_type_state(CONN_TYPE_CPUWORKER,
CPUWORKER_STATE_IDLE);
tor_assert(cpuworker);
if (!circ->p_conn) {
log_info(LD_OR,"circ->p_conn gone. Failing circ.");
tor_free(onionskin);
return -1;
}
tag_pack(tag, circ->p_conn->_base.global_identifier,
circ->p_circ_id);
cpuworker->state = CPUWORKER_STATE_BUSY_ONION;
/* touch the lastwritten timestamp, since that's how we check to
* see how long it's been since we asked the question, and sometimes
* we check before the first call to connection_handle_write(). */
cpuworker->timestamp_lastwritten = time(NULL);
num_cpuworkers_busy++;
qbuf[0] = CPUWORKER_TASK_ONION;
connection_write_to_buf(qbuf, 1, cpuworker);
connection_write_to_buf(tag, sizeof(tag), cpuworker);
connection_write_to_buf(onionskin, ONIONSKIN_CHALLENGE_LEN, cpuworker);
tor_free(onionskin);
}
return 0;
}
/** Called when the onion key has changed and we need to spawn new
* cpuworkers. Close all currently idle cpuworkers, and mark the last
* rotation time as now.
*/
void
cpuworkers_rotate(void)
{
connection_t *cpuworker;
while ((cpuworker = connection_get_by_type_state(CONN_TYPE_CPUWORKER,
CPUWORKER_STATE_IDLE))) {
connection_mark_for_close(cpuworker);
--num_cpuworkers;
}
last_rotation_time = time(NULL);
if (server_mode(get_options()))
spawn_enough_cpuworkers();
}
/** Try to tell a cpuworker to perform the public key operations necessary to
* respond to <b>onionskin</b> for the circuit <b>circ</b>.
*
* If <b>cpuworker</b> is defined, assert that he's idle, and use him. Else,
* look for an idle cpuworker and use him. If none idle, queue task onto the
* pending onion list and return. Return 0 if we successfully assign the
* task, or -1 on failure.
*/
int
assign_onionskin_to_cpuworker(connection_t *cpuworker,
or_circuit_t *circ,
create_cell_t *onionskin)
{
cpuworker_request_t req;
time_t now = approx_time();
static time_t last_culled_cpuworkers = 0;
int should_time;
/* Checking for wedged cpuworkers requires a linear search over all
* connections, so let's do it only once a minute.
*/
#define CULL_CPUWORKERS_INTERVAL 60
if (last_culled_cpuworkers + CULL_CPUWORKERS_INTERVAL <= now) {
cull_wedged_cpuworkers();
spawn_enough_cpuworkers();
last_culled_cpuworkers = now;
}
if (1) {
if (num_cpuworkers_busy == num_cpuworkers) {
log_debug(LD_OR,"No idle cpuworkers. Queuing.");
if (onion_pending_add(circ, onionskin) < 0) {
tor_free(onionskin);
return -1;
}
return 0;
}
if (!cpuworker)
cpuworker = connection_get_by_type_state(CONN_TYPE_CPUWORKER,
CPUWORKER_STATE_IDLE);
tor_assert(cpuworker);
if (!circ->p_chan) {
log_info(LD_OR,"circ->p_chan gone. Failing circ.");
tor_free(onionskin);
return -1;
}
if (connection_or_digest_is_known_relay(circ->p_chan->identity_digest))
rep_hist_note_circuit_handshake_assigned(onionskin->handshake_type);
should_time = should_time_request(onionskin->handshake_type);
memset(&req, 0, sizeof(req));
req.magic = CPUWORKER_REQUEST_MAGIC;
tag_pack(req.tag, circ->p_chan->global_identifier,
circ->p_circ_id);
req.timed = should_time;
cpuworker->state = CPUWORKER_STATE_BUSY_ONION;
/* touch the lastwritten timestamp, since that's how we check to
* see how long it's been since we asked the question, and sometimes
* we check before the first call to connection_handle_write(). */
cpuworker->timestamp_lastwritten = now;
num_cpuworkers_busy++;
req.task = CPUWORKER_TASK_ONION;
memcpy(&req.create_cell, onionskin, sizeof(create_cell_t));
tor_free(onionskin);
if (should_time)
tor_gettimeofday(&req.started_at);
connection_write_to_buf((void*)&req, sizeof(req), cpuworker);
memwipe(&req, 0, sizeof(req));
}
return 0;
}
static void
test_conn_get_basic(void *arg)
{
connection_t *conn = (connection_t*)arg;
tor_addr_t addr, addr2;
tt_assert(conn);
assert_connection_ok(conn, time(NULL));
test_conn_lookup_addr_helper(TEST_CONN_ADDRESS, TEST_CONN_FAMILY, &addr);
tt_assert(!tor_addr_is_null(&addr));
test_conn_lookup_addr_helper(TEST_CONN_ADDRESS_2, TEST_CONN_FAMILY, &addr2);
tt_assert(!tor_addr_is_null(&addr2));
/* Check that we get this connection back when we search for it by
* its attributes, but get NULL when we supply a different value. */
tt_assert(connection_get_by_global_id(conn->global_identifier) == conn);
tt_assert(connection_get_by_global_id(!conn->global_identifier) == NULL);
tt_assert(connection_get_by_type(conn->type) == conn);
tt_assert(connection_get_by_type(TEST_CONN_TYPE) == conn);
tt_assert(connection_get_by_type(!conn->type) == NULL);
tt_assert(connection_get_by_type(!TEST_CONN_TYPE) == NULL);
tt_assert(connection_get_by_type_state(conn->type, conn->state)
== conn);
tt_assert(connection_get_by_type_state(TEST_CONN_TYPE, TEST_CONN_STATE)
== conn);
tt_assert(connection_get_by_type_state(!conn->type, !conn->state)
== NULL);
tt_assert(connection_get_by_type_state(!TEST_CONN_TYPE, !TEST_CONN_STATE)
== NULL);
/* Match on the connection fields themselves */
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&conn->addr,
conn->port,
conn->purpose)
== conn);
/* Match on the original inputs to the connection */
tt_assert(connection_get_by_type_addr_port_purpose(TEST_CONN_TYPE,
&conn->addr,
conn->port,
conn->purpose)
== conn);
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&addr,
conn->port,
conn->purpose)
== conn);
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&conn->addr,
TEST_CONN_PORT,
conn->purpose)
== conn);
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&conn->addr,
conn->port,
TEST_CONN_BASIC_PURPOSE)
== conn);
tt_assert(connection_get_by_type_addr_port_purpose(TEST_CONN_TYPE,
&addr,
TEST_CONN_PORT,
TEST_CONN_BASIC_PURPOSE)
== conn);
/* Then try each of the not-matching combinations */
tt_assert(connection_get_by_type_addr_port_purpose(!conn->type,
&conn->addr,
conn->port,
conn->purpose)
== NULL);
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&addr2,
conn->port,
conn->purpose)
== NULL);
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&conn->addr,
!conn->port,
conn->purpose)
== NULL);
tt_assert(connection_get_by_type_addr_port_purpose(conn->type,
&conn->addr,
conn->port,
!conn->purpose)
== NULL);
/* Then try everything not-matching */
tt_assert(connection_get_by_type_addr_port_purpose(!conn->type,
&addr2,
!conn->port,
!conn->purpose)
== NULL);
tt_assert(connection_get_by_type_addr_port_purpose(!TEST_CONN_TYPE,
&addr2,
!TEST_CONN_PORT,
!TEST_CONN_BASIC_PURPOSE)
== NULL);
done:
;
}
