mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 13:13:44 +01:00
Merge branch 'bug23817_031' into maint-0.3.2
This commit is contained in:
commit
2cee26b164
3
changes/bug23817
Normal file
3
changes/bug23817
Normal file
@ -0,0 +1,3 @@
|
||||
o Minor bugfixes (descriptors):
|
||||
- Don't try fetching microdescriptors from relays that have failed to
|
||||
deliver them in the past. Fixes bug 23817; bugfix on 0.3.0.1-alpha.
|
@ -116,7 +116,8 @@ static void dir_routerdesc_download_failed(smartlist_t *failed,
|
||||
int was_extrainfo,
|
||||
int was_descriptor_digests);
|
||||
static void dir_microdesc_download_failed(smartlist_t *failed,
|
||||
int status_code);
|
||||
int status_code,
|
||||
const char *dir_id);
|
||||
static int client_likes_consensus(const struct consensus_cache_entry_t *ent,
|
||||
const char *want_url);
|
||||
|
||||
@ -469,7 +470,7 @@ directory_pick_generic_dirserver(dirinfo_type_t type, int pds_flags,
|
||||
log_warn(LD_BUG, "Called when we have UseBridges set.");
|
||||
|
||||
if (should_use_directory_guards(options)) {
|
||||
const node_t *node = guards_choose_dirguard(guard_state_out);
|
||||
const node_t *node = guards_choose_dirguard(dir_purpose, guard_state_out);
|
||||
if (node)
|
||||
rs = node->rs;
|
||||
} else {
|
||||
@ -603,7 +604,7 @@ directory_get_from_dirserver,(
|
||||
* sort of dir fetch we'll be doing, so it won't return a bridge
|
||||
* that can't answer our question.
|
||||
*/
|
||||
const node_t *node = guards_choose_dirguard(&guard_state);
|
||||
const node_t *node = guards_choose_dirguard(dir_purpose, &guard_state);
|
||||
if (node && node->ri) {
|
||||
/* every bridge has a routerinfo. */
|
||||
routerinfo_t *ri = node->ri;
|
||||
@ -2247,8 +2248,6 @@ static int handle_response_fetch_detached_signatures(dir_connection_t *,
|
||||
const response_handler_args_t *);
|
||||
static int handle_response_fetch_desc(dir_connection_t *,
|
||||
const response_handler_args_t *);
|
||||
static int handle_response_fetch_microdesc(dir_connection_t *,
|
||||
const response_handler_args_t *);
|
||||
static int handle_response_upload_dir(dir_connection_t *,
|
||||
const response_handler_args_t *);
|
||||
static int handle_response_upload_vote(dir_connection_t *,
|
||||
@ -2916,7 +2915,7 @@ handle_response_fetch_desc(dir_connection_t *conn,
|
||||
* Handler function: processes a response to a request for a group of
|
||||
* microdescriptors
|
||||
**/
|
||||
static int
|
||||
STATIC int
|
||||
handle_response_fetch_microdesc(dir_connection_t *conn,
|
||||
const response_handler_args_t *args)
|
||||
{
|
||||
@ -2933,6 +2932,7 @@ handle_response_fetch_microdesc(dir_connection_t *conn,
|
||||
conn->base_.port);
|
||||
tor_assert(conn->requested_resource &&
|
||||
!strcmpstart(conn->requested_resource, "d/"));
|
||||
tor_assert_nonfatal(!tor_mem_is_zero(conn->identity_digest, DIGEST_LEN));
|
||||
which = smartlist_new();
|
||||
dir_split_resource_into_fingerprints(conn->requested_resource+2,
|
||||
which, NULL,
|
||||
@ -2943,7 +2943,7 @@ handle_response_fetch_microdesc(dir_connection_t *conn,
|
||||
"soon.",
|
||||
status_code, escaped(reason), conn->base_.address,
|
||||
(int)conn->base_.port, conn->requested_resource);
|
||||
dir_microdesc_download_failed(which, status_code);
|
||||
dir_microdesc_download_failed(which, status_code, conn->identity_digest);
|
||||
SMARTLIST_FOREACH(which, char *, cp, tor_free(cp));
|
||||
smartlist_free(which);
|
||||
return 0;
|
||||
@ -2955,7 +2955,7 @@ handle_response_fetch_microdesc(dir_connection_t *conn,
|
||||
now, which);
|
||||
if (smartlist_len(which)) {
|
||||
/* Mark remaining ones as failed. */
|
||||
dir_microdesc_download_failed(which, status_code);
|
||||
dir_microdesc_download_failed(which, status_code, conn->identity_digest);
|
||||
}
|
||||
if (mds && smartlist_len(mds)) {
|
||||
control_event_bootstrap(BOOTSTRAP_STATUS_LOADING_DESCRIPTORS,
|
||||
@ -5812,13 +5812,14 @@ dir_routerdesc_download_failed(smartlist_t *failed, int status_code,
|
||||
* every 10 or 60 seconds (FOO_DESCRIPTOR_RETRY_INTERVAL) in main.c. */
|
||||
}
|
||||
|
||||
/** Called when a connection to download microdescriptors has failed in whole
|
||||
* or in part. <b>failed</b> is a list of every microdesc digest we didn't
|
||||
* get. <b>status_code</b> is the http status code we received. Reschedule the
|
||||
* microdesc downloads as appropriate. */
|
||||
/** Called when a connection to download microdescriptors from relay with
|
||||
* <b>dir_id</b> has failed in whole or in part. <b>failed</b> is a list
|
||||
* of every microdesc digest we didn't get. <b>status_code</b> is the http
|
||||
* status code we received. Reschedule the microdesc downloads as
|
||||
* appropriate. */
|
||||
static void
|
||||
dir_microdesc_download_failed(smartlist_t *failed,
|
||||
int status_code)
|
||||
int status_code, const char *dir_id)
|
||||
{
|
||||
networkstatus_t *consensus
|
||||
= networkstatus_get_latest_consensus_by_flavor(FLAV_MICRODESC);
|
||||
@ -5829,17 +5830,26 @@ dir_microdesc_download_failed(smartlist_t *failed,
|
||||
|
||||
if (! consensus)
|
||||
return;
|
||||
|
||||
/* We failed to fetch a microdescriptor from 'dir_id', note it down
|
||||
* so that we don't try the same relay next time... */
|
||||
microdesc_note_outdated_dirserver(dir_id);
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(failed, const char *, d) {
|
||||
rs = router_get_mutable_consensus_status_by_descriptor_digest(consensus,d);
|
||||
if (!rs)
|
||||
continue;
|
||||
dls = &rs->dl_status;
|
||||
if (dls->n_download_failures >=
|
||||
get_options()->TestingMicrodescMaxDownloadTries)
|
||||
get_options()->TestingMicrodescMaxDownloadTries) {
|
||||
continue;
|
||||
{
|
||||
}
|
||||
|
||||
{ /* Increment the failure count for this md fetch */
|
||||
char buf[BASE64_DIGEST256_LEN+1];
|
||||
digest256_to_base64(buf, d);
|
||||
log_info(LD_DIR, "Failed to download md %s from %s",
|
||||
buf, hex_str(dir_id, DIGEST_LEN));
|
||||
download_status_increment_failure(dls, status_code, buf,
|
||||
server, now);
|
||||
}
|
||||
|
@ -193,6 +193,8 @@ STATIC void warn_disallowed_anonymous_compression_method(compress_method_t);
|
||||
|
||||
STATIC int handle_response_fetch_hsdesc_v3(dir_connection_t *conn,
|
||||
const response_handler_args_t *args);
|
||||
STATIC int handle_response_fetch_microdesc(dir_connection_t *conn,
|
||||
const response_handler_args_t *args);
|
||||
|
||||
#endif /* defined(DIRECTORY_PRIVATE) */
|
||||
|
||||
|
@ -1460,6 +1460,96 @@ guard_in_node_family(const entry_guard_t *guard, const node_t *node)
|
||||
}
|
||||
}
|
||||
|
||||
/* Allocate and return a new exit guard restriction (where <b>exit_id</b> is of
|
||||
* size DIGEST_LEN) */
|
||||
STATIC entry_guard_restriction_t *
|
||||
guard_create_exit_restriction(const uint8_t *exit_id)
|
||||
{
|
||||
entry_guard_restriction_t *rst = NULL;
|
||||
rst = tor_malloc_zero(sizeof(entry_guard_restriction_t));
|
||||
rst->type = RST_EXIT_NODE;
|
||||
memcpy(rst->exclude_id, exit_id, DIGEST_LEN);
|
||||
return rst;
|
||||
}
|
||||
|
||||
/** If we have fewer than this many possible guards, don't set
|
||||
* MD-availability-based restrictions: we might blacklist all of
|
||||
* them. */
|
||||
#define MIN_GUARDS_FOR_MD_RESTRICTION 10
|
||||
|
||||
/** Return true if we should set md dirserver restrictions. We might not want
|
||||
* to set those if our network is too restricted, since we don't want to
|
||||
* blacklist all our nodes. */
|
||||
static int
|
||||
should_set_md_dirserver_restriction(void)
|
||||
{
|
||||
const guard_selection_t *gs = get_guard_selection_info();
|
||||
|
||||
/* Compute the number of filtered guards */
|
||||
int n_filtered_guards = 0;
|
||||
SMARTLIST_FOREACH_BEGIN(gs->sampled_entry_guards, entry_guard_t *, guard) {
|
||||
if (guard->is_filtered_guard) {
|
||||
++n_filtered_guards;
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(guard);
|
||||
|
||||
/* Do we have enough filtered guards that we feel okay about blacklisting
|
||||
* some for MD restriction? */
|
||||
return (n_filtered_guards >= MIN_GUARDS_FOR_MD_RESTRICTION);
|
||||
}
|
||||
|
||||
/** Allocate and return an outdated md guard restriction. Return NULL if no
|
||||
* such restriction is needed. */
|
||||
STATIC entry_guard_restriction_t *
|
||||
guard_create_dirserver_md_restriction(void)
|
||||
{
|
||||
entry_guard_restriction_t *rst = NULL;
|
||||
|
||||
if (!should_set_md_dirserver_restriction()) {
|
||||
log_debug(LD_GUARD, "Not setting md restriction: too few "
|
||||
"filtered guards.");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
rst = tor_malloc_zero(sizeof(entry_guard_restriction_t));
|
||||
rst->type = RST_OUTDATED_MD_DIRSERVER;
|
||||
|
||||
return rst;
|
||||
}
|
||||
|
||||
/* Return True if <b>guard</b> obeys the exit restriction <b>rst</b>. */
|
||||
static int
|
||||
guard_obeys_exit_restriction(const entry_guard_t *guard,
|
||||
const entry_guard_restriction_t *rst)
|
||||
{
|
||||
tor_assert(rst->type == RST_EXIT_NODE);
|
||||
|
||||
// Exclude the exit ID and all of its family.
|
||||
const node_t *node = node_get_by_id((const char*)rst->exclude_id);
|
||||
if (node && guard_in_node_family(guard, node))
|
||||
return 0;
|
||||
|
||||
return tor_memneq(guard->identity, rst->exclude_id, DIGEST_LEN);
|
||||
}
|
||||
|
||||
/** Return True if <b>guard</b> should be used as a dirserver for fetching
|
||||
* microdescriptors. */
|
||||
static int
|
||||
guard_obeys_md_dirserver_restriction(const entry_guard_t *guard)
|
||||
{
|
||||
/* If this guard is an outdated dirserver, don't use it. */
|
||||
if (microdesc_relay_is_outdated_dirserver(guard->identity)) {
|
||||
log_info(LD_GENERAL, "Skipping %s dirserver: outdated",
|
||||
hex_str(guard->identity, DIGEST_LEN));
|
||||
return 0;
|
||||
}
|
||||
|
||||
log_debug(LD_GENERAL, "%s dirserver obeys md restrictions",
|
||||
hex_str(guard->identity, DIGEST_LEN));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true iff <b>guard</b> obeys the restrictions defined in <b>rst</b>.
|
||||
* (If <b>rst</b> is NULL, there are no restrictions.)
|
||||
@ -1472,13 +1562,14 @@ entry_guard_obeys_restriction(const entry_guard_t *guard,
|
||||
if (! rst)
|
||||
return 1; // No restriction? No problem.
|
||||
|
||||
// Only one kind of restriction exists right now: excluding an exit
|
||||
// ID and all of its family.
|
||||
const node_t *node = node_get_by_id((const char*)rst->exclude_id);
|
||||
if (node && guard_in_node_family(guard, node))
|
||||
return 0;
|
||||
if (rst->type == RST_EXIT_NODE) {
|
||||
return guard_obeys_exit_restriction(guard, rst);
|
||||
} else if (rst->type == RST_OUTDATED_MD_DIRSERVER) {
|
||||
return guard_obeys_md_dirserver_restriction(guard);
|
||||
}
|
||||
|
||||
return tor_memneq(guard->identity, rst->exclude_id, DIGEST_LEN);
|
||||
tor_assert_nonfatal_unreached();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
@ -2105,7 +2196,7 @@ entry_guard_has_higher_priority(entry_guard_t *a, entry_guard_t *b)
|
||||
}
|
||||
|
||||
/** Release all storage held in <b>restriction</b> */
|
||||
static void
|
||||
STATIC void
|
||||
entry_guard_restriction_free(entry_guard_restriction_t *rst)
|
||||
{
|
||||
tor_free(rst);
|
||||
@ -3358,8 +3449,8 @@ guards_choose_guard(cpath_build_state_t *state,
|
||||
/* We're building to a targeted exit node, so that node can't be
|
||||
* chosen as our guard for this circuit. Remember that fact in a
|
||||
* restriction. */
|
||||
rst = tor_malloc_zero(sizeof(entry_guard_restriction_t));
|
||||
memcpy(rst->exclude_id, exit_id, DIGEST_LEN);
|
||||
rst = guard_create_exit_restriction(exit_id);
|
||||
tor_assert(rst);
|
||||
}
|
||||
if (entry_guard_pick_for_circuit(get_guard_selection_info(),
|
||||
GUARD_USAGE_TRAFFIC,
|
||||
@ -3411,12 +3502,20 @@ remove_all_entry_guards(void)
|
||||
|
||||
/** Helper: pick a directory guard, with whatever algorithm is used. */
|
||||
const node_t *
|
||||
guards_choose_dirguard(circuit_guard_state_t **guard_state_out)
|
||||
guards_choose_dirguard(uint8_t dir_purpose,
|
||||
circuit_guard_state_t **guard_state_out)
|
||||
{
|
||||
const node_t *r = NULL;
|
||||
entry_guard_restriction_t *rst = NULL;
|
||||
|
||||
/* If we are fetching microdescs, don't query outdated dirservers. */
|
||||
if (dir_purpose == DIR_PURPOSE_FETCH_MICRODESC) {
|
||||
rst = guard_create_dirserver_md_restriction();
|
||||
}
|
||||
|
||||
if (entry_guard_pick_for_circuit(get_guard_selection_info(),
|
||||
GUARD_USAGE_DIRGUARD,
|
||||
NULL,
|
||||
rst,
|
||||
&r,
|
||||
guard_state_out) < 0) {
|
||||
tor_assert(r == NULL);
|
||||
|
@ -272,22 +272,28 @@ struct guard_selection_s {
|
||||
|
||||
struct entry_guard_handle_t;
|
||||
|
||||
/** Types of restrictions we impose when picking guard nodes */
|
||||
typedef enum guard_restriction_type_t {
|
||||
/* Don't pick the same guard node as our exit node (or its family) */
|
||||
RST_EXIT_NODE = 0,
|
||||
/* Don't pick dirguards that have previously shown to be outdated */
|
||||
RST_OUTDATED_MD_DIRSERVER = 1
|
||||
} guard_restriction_type_t;
|
||||
|
||||
/**
|
||||
* A restriction to remember which entry guards are off-limits for a given
|
||||
* circuit.
|
||||
*
|
||||
* Right now, we only use restrictions to block a single guard and its family
|
||||
* from being selected; this mechanism is designed to be more extensible in
|
||||
* the future, however.
|
||||
*
|
||||
* Note: This mechanism is NOT for recording which guards are never to be
|
||||
* used: only which guards cannot be used on <em>one particular circuit</em>.
|
||||
*/
|
||||
struct entry_guard_restriction_t {
|
||||
/**
|
||||
* The guard's RSA identity digest must not equal this; and it must not
|
||||
* be in the same family as any node with this digest.
|
||||
*/
|
||||
/* What type of restriction are we imposing? */
|
||||
guard_restriction_type_t type;
|
||||
|
||||
/* In case of restriction type RST_EXIT_NODE, the guard's RSA identity
|
||||
* digest must not equal this; and it must not be in the same family as any
|
||||
* node with this digest. */
|
||||
uint8_t exclude_id[DIGEST_LEN];
|
||||
};
|
||||
|
||||
@ -316,7 +322,8 @@ struct circuit_guard_state_t {
|
||||
int guards_update_all(void);
|
||||
const node_t *guards_choose_guard(cpath_build_state_t *state,
|
||||
circuit_guard_state_t **guard_state_out);
|
||||
const node_t *guards_choose_dirguard(circuit_guard_state_t **guard_state_out);
|
||||
const node_t *guards_choose_dirguard(uint8_t dir_purpose,
|
||||
circuit_guard_state_t **guard_state_out);
|
||||
|
||||
#if 1
|
||||
/* XXXX NM I would prefer that all of this stuff be private to
|
||||
@ -550,6 +557,14 @@ STATIC unsigned entry_guards_note_guard_success(guard_selection_t *gs,
|
||||
unsigned old_state);
|
||||
STATIC int entry_guard_has_higher_priority(entry_guard_t *a, entry_guard_t *b);
|
||||
STATIC char *getinfo_helper_format_single_entry_guard(const entry_guard_t *e);
|
||||
|
||||
STATIC entry_guard_restriction_t *guard_create_exit_restriction(
|
||||
const uint8_t *exit_id);
|
||||
|
||||
STATIC entry_guard_restriction_t *guard_create_dirserver_md_restriction(void);
|
||||
|
||||
STATIC void entry_guard_restriction_free(entry_guard_restriction_t *rst);
|
||||
|
||||
#endif /* defined(ENTRYNODES_PRIVATE) */
|
||||
|
||||
void remove_all_entry_guards_for_guard_selection(guard_selection_t *gs);
|
||||
|
@ -74,6 +74,102 @@ HT_GENERATE2(microdesc_map, microdesc_t, node,
|
||||
microdesc_hash_, microdesc_eq_, 0.6,
|
||||
tor_reallocarray_, tor_free_)
|
||||
|
||||
/************************* md fetch fail cache *****************************/
|
||||
|
||||
/* If we end up with too many outdated dirservers, something probably went
|
||||
* wrong so clean up the list. */
|
||||
#define TOO_MANY_OUTDATED_DIRSERVERS 30
|
||||
|
||||
/** List of dirservers with outdated microdesc information. The smartlist is
|
||||
* filled with the hex digests of outdated dirservers. */
|
||||
static smartlist_t *outdated_dirserver_list = NULL;
|
||||
|
||||
/** Note that we failed to fetch a microdescriptor from the relay with
|
||||
* <b>relay_digest</b> (of size DIGEST_LEN). */
|
||||
void
|
||||
microdesc_note_outdated_dirserver(const char *relay_digest)
|
||||
{
|
||||
char relay_hexdigest[HEX_DIGEST_LEN+1];
|
||||
|
||||
/* Don't register outdated dirservers if we don't have a live consensus,
|
||||
* since we might be trying to fetch microdescriptors that are not even
|
||||
* currently active. */
|
||||
if (!networkstatus_get_live_consensus(approx_time())) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (!outdated_dirserver_list) {
|
||||
outdated_dirserver_list = smartlist_new();
|
||||
}
|
||||
|
||||
tor_assert(outdated_dirserver_list);
|
||||
|
||||
/* If the list grows too big, clean it up */
|
||||
if (BUG(smartlist_len(outdated_dirserver_list) >
|
||||
TOO_MANY_OUTDATED_DIRSERVERS)) {
|
||||
microdesc_reset_outdated_dirservers_list();
|
||||
}
|
||||
|
||||
/* Turn the binary relay digest to a hex since smartlists have better support
|
||||
* for strings than digests. */
|
||||
base16_encode(relay_hexdigest,sizeof(relay_hexdigest),
|
||||
relay_digest, DIGEST_LEN);
|
||||
|
||||
/* Make sure we don't add a dirauth as an outdated dirserver */
|
||||
if (router_get_trusteddirserver_by_digest(relay_digest)) {
|
||||
log_info(LD_GENERAL, "Auth %s gave us outdated dirinfo.", relay_hexdigest);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Don't double-add outdated dirservers */
|
||||
if (smartlist_contains_string(outdated_dirserver_list, relay_hexdigest)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Add it to the list of outdated dirservers */
|
||||
smartlist_add_strdup(outdated_dirserver_list, relay_hexdigest);
|
||||
|
||||
log_info(LD_GENERAL, "Noted %s as outdated md dirserver", relay_hexdigest);
|
||||
}
|
||||
|
||||
/** Return True if the relay with <b>relay_digest</b> (size DIGEST_LEN) is an
|
||||
* outdated dirserver */
|
||||
int
|
||||
microdesc_relay_is_outdated_dirserver(const char *relay_digest)
|
||||
{
|
||||
char relay_hexdigest[HEX_DIGEST_LEN+1];
|
||||
|
||||
if (!outdated_dirserver_list) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Convert identity digest to hex digest */
|
||||
base16_encode(relay_hexdigest, sizeof(relay_hexdigest),
|
||||
relay_digest, DIGEST_LEN);
|
||||
|
||||
/* Last time we tried to fetch microdescs, was this directory mirror missing
|
||||
* any mds we asked for? */
|
||||
if (smartlist_contains_string(outdated_dirserver_list, relay_hexdigest)) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Reset the list of outdated dirservers. */
|
||||
void
|
||||
microdesc_reset_outdated_dirservers_list(void)
|
||||
{
|
||||
if (!outdated_dirserver_list) {
|
||||
return;
|
||||
}
|
||||
|
||||
SMARTLIST_FOREACH(outdated_dirserver_list, char *, cp, tor_free(cp));
|
||||
smartlist_clear(outdated_dirserver_list);
|
||||
}
|
||||
|
||||
/****************************************************************************/
|
||||
|
||||
/** Write the body of <b>md</b> into <b>f</b>, with appropriate annotations.
|
||||
* On success, return the total number of bytes written, and set
|
||||
* *<b>annotation_len_out</b> to the number of bytes written as
|
||||
@ -789,6 +885,11 @@ microdesc_free_all(void)
|
||||
tor_free(the_microdesc_cache->journal_fname);
|
||||
tor_free(the_microdesc_cache);
|
||||
}
|
||||
|
||||
if (outdated_dirserver_list) {
|
||||
SMARTLIST_FOREACH(outdated_dirserver_list, char *, cp, tor_free(cp));
|
||||
smartlist_free(outdated_dirserver_list);
|
||||
}
|
||||
}
|
||||
|
||||
/** If there is a microdescriptor in <b>cache</b> whose sha256 digest is
|
||||
|
@ -50,5 +50,9 @@ int we_fetch_microdescriptors(const or_options_t *options);
|
||||
int we_fetch_router_descriptors(const or_options_t *options);
|
||||
int we_use_microdescriptors_for_circuits(const or_options_t *options);
|
||||
|
||||
void microdesc_note_outdated_dirserver(const char *relay_digest);
|
||||
int microdesc_relay_is_outdated_dirserver(const char *relay_digest);
|
||||
void microdesc_reset_outdated_dirservers_list(void);
|
||||
|
||||
#endif /* !defined(TOR_MICRODESC_H) */
|
||||
|
||||
|
@ -2014,6 +2014,9 @@ networkstatus_set_current_consensus(const char *consensus,
|
||||
tor_free(flavormsg);
|
||||
}
|
||||
|
||||
/* We got a new consesus. Reset our md fetch fail cache */
|
||||
microdesc_reset_outdated_dirservers_list();
|
||||
|
||||
router_dir_info_changed();
|
||||
|
||||
result = 0;
|
||||
|
Loading…
Reference in New Issue
Block a user