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Allow different HSes to maintain different numbers of intro points

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This commit is contained in:
Robert Ransom 2011-10-04 17:34:42 -07:00
parent fbea8c8ef1
commit 190aac0eab
1 changed files with 22 additions and 12 deletions
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34
src/or/rendservice.c
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@ -35,8 +35,10 @@ typedef struct rend_service_port_config_t {
tor_addr_t real_addr;
} rend_service_port_config_t;
/** Try to maintain this many intro points per service if possible. */
#define NUM_INTRO_POINTS 3
/** Try to maintain this many intro points per service by default. */
#define NUM_INTRO_POINTS_DEFAULT 3
/** Maintain no more than this many intro points per hidden service. */
#define NUM_INTRO_POINTS_MAX 10
/** If we can't build our intro circuits, don't retry for this long. */
#define INTRO_CIRC_RETRY_PERIOD (60*5)
@ -71,6 +73,8 @@ typedef struct rend_service_t {
* introduction points. */
int n_intro_circuits_launched; /**< Count of intro circuits we have
* established in this period. */
unsigned int n_intro_points_wanted; /**< Number of intro points this
* service wants to have open. */
rend_service_descriptor_t *desc; /**< Current hidden service descriptor. */
time_t desc_is_dirty; /**< Time at which changes to the hidden service
* descriptor content occurred, or 0 if it's
@ -315,6 +319,7 @@ rend_config_services(or_options_t *options, int validate_only)
service->directory = tor_strdup(line->value);
service->ports = smartlist_create();
service->intro_period_started = time(NULL);
service->n_intro_points_wanted = NUM_INTRO_POINTS_DEFAULT;
continue;
}
if (!service) {
@ -1406,7 +1411,8 @@ rend_service_intro_has_opened(origin_circuit_t *circuit)
/* If we already have enough introduction circuits for this service,
* redefine this one as a general circuit or close it, depending. */
if (count_established_intro_points(serviceid) > NUM_INTRO_POINTS) {
if (count_established_intro_points(serviceid) >
(int)service->n_intro_points_wanted) { /* XXX023 remove cast */
or_options_t *options = get_options();
if (options->ExcludeNodes) {
/* XXXX in some future version, we can test whether the transition is
@ -1845,6 +1851,7 @@ rend_services_introduce(void)
rend_service_t *service;
rend_intro_point_t *intro;
int changed, prev_intro_nodes;
unsigned int n_intro_points_to_open;
smartlist_t *intro_routers;
time_t now;
or_options_t *options = get_options();
@ -1901,7 +1908,8 @@ rend_services_introduce(void)
/* We have enough intro points, and the intro points we thought we had were
* all connected.
*/
if (!changed && smartlist_len(service->intro_nodes) >= NUM_INTRO_POINTS) {
if (!changed && (smartlist_len(service->intro_nodes) >=
(int)service->n_intro_points_wanted)) { /*XXX023 remove cast*/
/* We have all our intro points! Start a fresh period and reset the
* circuit count. */
service->intro_period_started = now;
@ -1912,18 +1920,18 @@ rend_services_introduce(void)
/* Remember how many introduction circuits we started with. */
prev_intro_nodes = smartlist_len(service->intro_nodes);
/* We have enough directory information to start establishing our
* intro points. We want to end up with three intro points, but if
* we're just starting, we launch five and pick the first three that
* complete.
* intro points. We want to end up with n_intro_points_wanted
* intro points, but if we're just starting, we launch two extra
* circuits and use the first n_intro_points_wanted that complete.
*
* The ones after the first three will be converted to 'general'
* internal circuits in rend_service_intro_has_opened(), and then
* we'll drop them from the list of intro points next time we
* go through the above "find out which introduction points we have
* in progress" loop. */
#define NUM_INTRO_POINTS_INIT (NUM_INTRO_POINTS + 2)
for (j=prev_intro_nodes; j < (prev_intro_nodes == 0 ?
NUM_INTRO_POINTS_INIT : NUM_INTRO_POINTS); ++j) {
n_intro_points_to_open = (service->n_intro_points_wanted +
(prev_intro_nodes == 0 ? 2 : 0));
for (j=prev_intro_nodes; j < (int)n_intro_points_to_open; ++j) { /* XXXX remove cast */
router_crn_flags_t flags = CRN_NEED_UPTIME;
if (get_options()->_AllowInvalid & ALLOW_INVALID_INTRODUCTION)
flags |= CRN_ALLOW_INVALID;
@ -1931,8 +1939,10 @@ rend_services_introduce(void)
options->ExcludeNodes, flags);
if (!router) {
log_warn(LD_REND,
"Could only establish %d introduction points for %s.",
smartlist_len(service->intro_nodes), service->service_id);
"Could only establish %d introduction points for %s; "
"wanted %u.",
smartlist_len(service->intro_nodes), service->service_id,
n_intro_points_to_open);
break;
}
changed = 1;