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Remove the (no longer compiled) code for legacy guard selection.

Browse Source 
Part of 20830.
This commit is contained in:
Nick Mathewson 2017-01-18 15:27:10 -05:00
parent e167a0e17d
commit 472b277207
12 changed files with 3 additions and 2852 deletions
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9
src/or/bridges.c
View File

@ -762,11 +762,7 @@ learned_bridge_descriptor(routerinfo_t *ri, int from_cache)
(int) bridge->port);
}
if (get_options()->UseDeprecatedGuardAlgorithm) {
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
add_bridge_as_entry_guard(get_guard_selection_info(), node);
#else
tor_assert_nonfatal_unreached();
#endif
} else {
entry_guard_learned_bridge_identity(&bridge->addrport_configured,
(const uint8_t*)ri->cache_info.identity_digest);
@ -777,12 +773,7 @@ learned_bridge_descriptor(routerinfo_t *ri, int from_cache)
/* set entry->made_contact so if it goes down we don't drop it from
* our entry node list */
if (get_options()->UseDeprecatedGuardAlgorithm) {
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
entry_guard_register_connect_status(ri->cache_info.identity_digest,
1, 0, now);
#else
tor_assert_nonfatal_unreached();
#endif
}
if (first) {
routerlist_retry_directory_downloads(now);

13
src/or/channel.c
View File

@ -2577,19 +2577,6 @@ channel_do_open_actions(channel_t *chan)
if (started_here) {
circuit_build_times_network_is_live(get_circuit_build_times_mutable());
rep_hist_note_connect_succeeded(chan->identity_digest, now);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
// XXXX prop271 this call is no longer useful with the new algorithm.
if (entry_guard_register_connect_status(
chan->identity_digest, 1, 0, now) < 0) {
/* Close any circuits pending on this channel. We leave it in state
* 'open' though, because it didn't actually *fail* -- we just
* chose not to use it. */
log_debug(LD_OR,
"New entry guard was reachable, but closing this "
"connection so we can retry the earlier entry guards.");
close_origin_circuits = 1;
}
#endif
router_set_status(chan->identity_digest, 1);
} else {
/* only report it to the geoip module if it's not a known router */

8
src/or/circpathbias.c
View File

@ -1279,10 +1279,6 @@ pathbias_measure_use_rate(entry_guard_t *guard)
tor_lround(pb->timeouts),
tor_lround(get_circuit_build_close_time_ms()/1000));
pb->path_bias_disabled = 1;
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
// XXXX
entry_guard_mark_bad(guard);
#endif
return;
}
} else if (!pb->path_bias_use_extreme) {
@ -1388,10 +1384,6 @@ pathbias_measure_close_rate(entry_guard_t *guard)
tor_lround(pb->timeouts),
tor_lround(get_circuit_build_close_time_ms()/1000));
pb->path_bias_disabled = 1;
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
// XXXX
entry_guard_mark_bad(guard);
#endif
return;
}
} else if (!pb->path_bias_extreme) {

20
src/or/circuitbuild.c
View File

@ -2308,26 +2308,6 @@ choose_good_entry_server(uint8_t purpose, cpath_build_state_t *state,
* family. */
nodelist_add_node_and_family(excluded, node);
}
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/* and exclude current entry guards and their families,
* unless we're in a test network, and excluding guards
* would exclude all nodes (i.e. we're in an incredibly small tor network,
* or we're using TestingAuthVoteGuard *).
* This is an incomplete fix, but is no worse than the previous behaviour,
* and only applies to minimal, testing tor networks
* (so it's no less secure) */
if (options->UseEntryGuards
&& (!options->TestingTorNetwork ||
smartlist_len(nodelist_get_list()) > smartlist_len(get_entry_guards())
)) {
SMARTLIST_FOREACH(get_entry_guards(), const entry_guard_t *, entry,
{
if ((node = entry_guard_find_node(entry))) {
nodelist_add_node_and_family(excluded, node);
}
});
}
#endif
if (state) {
if (state->need_uptime)

4
src/or/circuituse.c
View File

@ -1732,10 +1732,6 @@ circuit_build_failed(origin_circuit_t *circ)
/* New guard API: we failed. */
if (circ->guard_state)
entry_guard_failed(&circ->guard_state);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/* Old guard API: we failed. */
entry_guard_register_connect_status(n_chan_id, 0, 1, time(NULL));
#endif
/* if there are any one-hop streams waiting on this circuit, fail
* them now so they can retry elsewhere. */
connection_ap_fail_onehop(n_chan_id, circ->build_state);

16
src/or/config.c
View File

@ -2097,15 +2097,6 @@ options_act(const or_options_t *old_options)
!options->BridgeAuthoritativeDir)
rep_hist_desc_stats_term();
/* Check if we need to parse and add the EntryNodes config option. */
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
if (options->EntryNodes &&
(!old_options ||
!routerset_equal(old_options->EntryNodes,options->EntryNodes) ||
!routerset_equal(old_options->ExcludeNodes,options->ExcludeNodes)))
entry_nodes_should_be_added();
#endif
/* Since our options changed, we might need to regenerate and upload our
* server descriptor.
*/
@ -3009,13 +3000,6 @@ options_validate(or_options_t *old_options, or_options_t *options,
warn_about_relative_paths(options);
#ifndef ENABLE_LEGACY_GUARD_ALGORITHM
if (options->UseDeprecatedGuardAlgorithm) {
log_warn(LD_CONFIG, "DeprecatedGuardAlgorithm not supported.");
return -1;
}
#endif
if (server_mode(options) &&
(!strcmpstart(uname, "Windows 95") ||
!strcmpstart(uname, "Windows 98") ||

10
src/or/connection_or.c
View File

@ -718,11 +718,6 @@ connection_or_about_to_close(or_connection_t *or_conn)
rep_hist_note_connect_failed(or_conn->identity_digest, now);
/* Tell the new guard API about the channel failure */
entry_guard_chan_failed(TLS_CHAN_TO_BASE(or_conn->chan));
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/* Tell the old guard API about the channel failure */
entry_guard_register_connect_status(or_conn->identity_digest,0,
!options->HTTPSProxy, now);
#endif
if (conn->state >= OR_CONN_STATE_TLS_HANDSHAKING) {
int reason = tls_error_to_orconn_end_reason(or_conn->tls_error);
control_event_or_conn_status(or_conn, OR_CONN_EVENT_FAILED,
@ -1728,11 +1723,6 @@ connection_or_client_learned_peer_id(or_connection_t *conn,
/* Tell the new guard API about the channel failure */
entry_guard_chan_failed(TLS_CHAN_TO_BASE(conn->chan));
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/* Tell the old guard API about the channel failure */
entry_guard_register_connect_status(conn->identity_digest, 0, 1,
time(NULL));
#endif
control_event_or_conn_status(conn, OR_CONN_EVENT_FAILED,
END_OR_CONN_REASON_OR_IDENTITY);
if (!authdir_mode_tests_reachability(options))

1794
src/or/entrynodes.c
View File

File diff suppressed because it is too large Load Diff

122
src/or/entrynodes.h
View File

@ -28,11 +28,6 @@ typedef struct circuit_guard_state_t circuit_guard_state_t;
private. */
typedef struct entry_guard_restriction_t entry_guard_restriction_t;
/*
XXXX Prop271 undefine this in order to disable all legacy guard functions.
*/
// #define ENABLE_LEGACY_GUARD_ALGORITHM
/* Information about a guard's pathbias status.
* These fields are used in circpathbias.c to try to detect entry
* nodes that are failing circuits at a suspicious frequency.
@ -179,37 +174,6 @@ struct entry_guard_t {
guard_selection_t *in_selection;
/**@}*/
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/**
* @name legacy guard selection algorithm fields
*
* These are used and maintained by the legacy (pre-prop271) entry guard
* algorithm. Most of them we will remove as prop271 gets implemented.
* The rest we'll migrate over, if they are 100% semantically identical to
* their prop271 equivalents. XXXXprop271
*/
/**@{*/
time_t chosen_on_date; /**< Approximately when was this guard added?
* "0" if we don't know. */
char *chosen_by_version; /**< What tor version added this guard? NULL
* if we don't know. */
unsigned int made_contact : 1; /**< 0 if we have never connected to this
* router, 1 if we have. */
unsigned int can_retry : 1; /**< Should we retry connecting to this entry,
* in spite of having it marked as unreachable?*/
unsigned int is_dir_cache : 1; /**< Is this node a directory cache? */
time_t bad_since; /**< 0 if this guard is currently usable, or the time at
* which it was observed to become (according to the
* directory or the user configuration) unusable. */
time_t unreachable_since; /**< 0 if we can connect to this guard, or the
* time at which we first noticed we couldn't
* connect to it. */
time_t last_attempted; /**< 0 if we can connect to this guard, or the time
* at which we last failed to connect to it. */
/**}@*/
#endif
/** Path bias information for this guard. */
guard_pathbias_t pb;
};
@ -305,20 +269,6 @@ struct guard_selection_s {
* confirmed_entry_guards receive? */
int next_confirmed_idx;
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/**
* A list of our chosen entry guards, as entry_guard_t structures; this
* preserves the pre-Prop271 behavior.
*/
smartlist_t *chosen_entry_guards;
/**
* When we try to choose an entry guard, should we parse and add
* config's EntryNodes first? This was formerly a global. This
* preserves the pre-Prop271 behavior.
*/
int should_add_entry_nodes;
#endif
};
struct entry_guard_handle_t;
@ -378,11 +328,6 @@ entry_guard_t *entry_guard_get_by_id_digest(const char *digest);
void entry_guards_changed_for_guard_selection(guard_selection_t *gs);
void entry_guards_changed(void);
guard_selection_t * get_guard_selection_info(void);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
const smartlist_t *get_entry_guards_for_guard_selection(
guard_selection_t *gs);
const smartlist_t *get_entry_guards(void);
#endif
int num_live_entry_guards_for_guard_selection(
guard_selection_t *gs,
int for_directory);
@ -390,9 +335,6 @@ int num_live_entry_guards(int for_directory);
#endif
const node_t *entry_guard_find_node(const entry_guard_t *guard);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
void entry_guard_mark_bad(entry_guard_t *guard);
#endif
const char *entry_guard_get_rsa_id_digest(const entry_guard_t *guard);
const char *entry_guard_describe(const entry_guard_t *guard);
guard_pathbias_t *entry_guard_get_pathbias_state(entry_guard_t *guard);
@ -432,10 +374,6 @@ void entry_guards_note_internet_connectivity(guard_selection_t *gs);
int update_guard_selection_choice(const or_options_t *options);
/* Used by bridges.c only. */
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
void add_bridge_as_entry_guard(guard_selection_t *gs,
const node_t *chosen);
#endif
int num_bridges_usable(void);
#ifdef ENTRYNODES_PRIVATE
@ -612,68 +550,13 @@ STATIC unsigned entry_guards_note_guard_success(guard_selection_t *gs,
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,
int is_legacy);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
// ---------- XXXX this stuff is pre-prop271.
STATIC const node_t *add_an_entry_guard(guard_selection_t *gs,
const node_t *chosen,
int reset_status, int prepend,
int for_discovery, int for_directory);
STATIC int populate_live_entry_guards(smartlist_t *live_entry_guards,
const smartlist_t *all_entry_guards,
const node_t *chosen_exit,
dirinfo_type_t dirinfo_type,
int for_directory,
int need_uptime, int need_capacity);
STATIC int decide_num_guards(const or_options_t *options, int for_directory);
STATIC void entry_guards_set_from_config(guard_selection_t *gs,
const or_options_t *options);
/** Flags to be passed to entry_is_live() to indicate what kind of
* entry nodes we are looking for. */
typedef enum {
ENTRY_NEED_UPTIME = 1<<0,
ENTRY_NEED_CAPACITY = 1<<1,
ENTRY_ASSUME_REACHABLE = 1<<2,
ENTRY_NEED_DESCRIPTOR = 1<<3,
} entry_is_live_flags_t;
STATIC const node_t *entry_is_live(const entry_guard_t *e,
entry_is_live_flags_t flags,
const char **msg);
STATIC int entry_is_time_to_retry(const entry_guard_t *e, time_t now);
#endif
#endif
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
void remove_all_entry_guards_for_guard_selection(guard_selection_t *gs);
void remove_all_entry_guards(void);
#endif
struct bridge_info_t;
void entry_guard_learned_bridge_identity(const tor_addr_port_t *addrport,
const uint8_t *rsa_id_digest);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
void entry_guards_compute_status_for_guard_selection(
guard_selection_t *gs, const or_options_t *options, time_t now);
void entry_guards_compute_status(const or_options_t *options, time_t now);
int entry_guard_register_connect_status_for_guard_selection(
guard_selection_t *gs, const char *digest, int succeeded,
int mark_relay_status, time_t now);
int entry_guard_register_connect_status(const char *digest, int succeeded,
int mark_relay_status, time_t now);
void entry_nodes_should_be_added_for_guard_selection(guard_selection_t *gs);
void entry_nodes_should_be_added(void);
#endif
int entry_list_is_constrained(const or_options_t *options);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
const node_t *choose_random_entry(cpath_build_state_t *state);
const node_t *choose_random_dirguard(dirinfo_type_t t);
#endif
int guards_retry_optimistic(const or_options_t *options);
int entry_guards_parse_state_for_guard_selection(
guard_selection_t *gs, or_state_t *state, int set, char **msg);
@ -682,11 +565,6 @@ void entry_guards_update_state(or_state_t *state);
int getinfo_helper_entry_guards(control_connection_t *conn,
const char *question, char **answer,
const char **errmsg);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
int is_node_used_as_guard_for_guard_selection(guard_selection_t *gs,
const node_t *node);
MOCK_DECL(int, is_node_used_as_guard, (const node_t *node));
#endif
int entries_known_but_down(const or_options_t *options);
void entries_retry_all(const or_options_t *options);

11
src/or/routerlist.c
View File

@ -1999,10 +1999,7 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags,
const int for_guard = (flags & PDS_FOR_GUARD);
int try_excluding = 1, n_excluded = 0, n_busy = 0;
int try_ip_pref = 1;
#ifndef ENABLE_LEGACY_GUARD_ALGORITHM
tor_assert_nonfatal(! for_guard);
#endif
tor_assert_nonfatal(! for_guard); // XXXX prop271
if (!consensus)
return NULL;
@ -2036,12 +2033,6 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags,
SKIP_MISSING_TRUSTED_EXTRAINFO(type, node->identity);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/* Don't make the same node a guard twice */
if (for_guard && is_node_used_as_guard(node)) {
continue;
}
#endif
/* Ensure that a directory guard is actually a guard node. */
if (for_guard && !node->is_possible_guard) {
continue;

764
src/test/test_entrynodes.c
View File

@ -45,41 +45,6 @@ get_or_state_replacement(void)
return dummy_state;
}
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/* Unittest cleanup function: Cleanup the fake network. */
static int
fake_network_cleanup(const struct testcase_t *testcase, void *ptr)
{
(void) testcase;
(void) ptr;
routerlist_free_all();
nodelist_free_all();
entry_guards_free_all();
or_state_free(dummy_state);
return 1; /* NOP */
}
/* Unittest setup function: Setup a fake network. */
static void *
fake_network_setup(const struct testcase_t *testcase)
{
(void) testcase;
/* Setup fake state */
dummy_state = tor_malloc_zero(sizeof(or_state_t));
MOCK(get_or_state,
get_or_state_replacement);
/* Setup fake routerlist. */
helper_setup_fake_routerlist();
/* Return anything but NULL (it's interpreted as test fail) */
return dummy_state;
}
#endif
static networkstatus_t *dummy_consensus = NULL;
static smartlist_t *big_fake_net_nodes = NULL;
@ -202,697 +167,6 @@ mock_get_options(void)
return &mocked_options;
}
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
/** Test choose_random_entry() with none of our routers being guard nodes. */
static void
test_choose_random_entry_no_guards(void *arg)
{
const node_t *chosen_entry = NULL;
(void) arg;
MOCK(get_options, mock_get_options);
/* Check that we get a guard if it passes preferred
* address settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = 0;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
/* Try to pick an entry even though none of our routers are guards. */
chosen_entry = choose_random_entry(NULL);
/* Unintuitively, we actually pick a random node as our entry,
because router_choose_random_node() relaxes its constraints if it
can't find a proper entry guard. */
tt_assert(chosen_entry);
/* And with the other IP version active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* And with the preference on auto */
mocked_options.ClientPreferIPv6ORPort = -1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* Check that we don't get a guard if it doesn't pass mandatory address
* settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 0;
mocked_options.ClientPreferIPv6ORPort = 0;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
chosen_entry = choose_random_entry(NULL);
/* If we don't allow IPv4 at all, we don't get a guard*/
tt_assert(!chosen_entry);
/* Check that we get a guard if it passes allowed but not preferred address
* settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 1;
mocked_options.ClientPreferIPv6ORPort = 1;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* Check that we get a guard if it passes preferred address settings when
* they're auto */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = -1;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* And with IPv6 active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
done:
memset(&mocked_options, 0, sizeof(mocked_options));
UNMOCK(get_options);
}
/** Test choose_random_entry() with only one of our routers being a
guard node. */
static void
test_choose_random_entry_one_possible_guard(void *arg)
{
const node_t *chosen_entry = NULL;
node_t *the_guard = NULL;
smartlist_t *our_nodelist = NULL;
(void) arg;
MOCK(get_options, mock_get_options);
/* Set one of the nodes to be a guard. */
our_nodelist = nodelist_get_list();
the_guard = smartlist_get(our_nodelist, 4); /* chosen by fair dice roll */
the_guard->is_possible_guard = 1;
/* Check that we get the guard if it passes preferred
* address settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = 0;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
/* Pick an entry. Make sure we pick the node we marked as guard. */
chosen_entry = choose_random_entry(NULL);
tt_ptr_op(chosen_entry, OP_EQ, the_guard);
/* And with the other IP version active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_ptr_op(chosen_entry, OP_EQ, the_guard);
/* And with the preference on auto */
mocked_options.ClientPreferIPv6ORPort = -1;
chosen_entry = choose_random_entry(NULL);
tt_ptr_op(chosen_entry, OP_EQ, the_guard);
/* Check that we don't get a guard if it doesn't pass mandatory address
* settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 0;
mocked_options.ClientPreferIPv6ORPort = 0;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
chosen_entry = choose_random_entry(NULL);
/* If we don't allow IPv4 at all, we don't get a guard*/
tt_assert(!chosen_entry);
/* Check that we get a node if it passes allowed but not preferred
* address settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 1;
mocked_options.ClientPreferIPv6ORPort = 1;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
chosen_entry = choose_random_entry(NULL);
/* We disable the guard check and the preferred address check at the same
* time, so we can't be sure we get the guard */
tt_assert(chosen_entry);
/* Check that we get a node if it is allowed but not preferred when settings
* are auto */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = -1;
mocked_options.UseDeprecatedGuardAlgorithm = 1;
chosen_entry = choose_random_entry(NULL);
/* We disable the guard check and the preferred address check at the same
* time, so we can't be sure we get the guard */
tt_assert(chosen_entry);
/* and with IPv6 active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
done:
memset(&mocked_options, 0, sizeof(mocked_options));
UNMOCK(get_options);
}
/** Helper to conduct tests for populate_live_entry_guards().
This test adds some entry guards to our list, and then tests
populate_live_entry_guards() to mke sure it filters them correctly.
<b>num_needed</b> is the number of guard nodes we support. It's
configurable to make sure we function properly with 1 or 3 guard
nodes configured.
*/
static void
populate_live_entry_guards_test_helper(int num_needed)
{
smartlist_t *our_nodelist = NULL;
smartlist_t *live_entry_guards = smartlist_new();
guard_selection_t *gs = get_guard_selection_info();
const smartlist_t *all_entry_guards =
get_entry_guards_for_guard_selection(gs);
or_options_t *options = get_options_mutable();
int retval;
/* Set NumEntryGuards to the provided number. */
options->NumEntryGuards = num_needed;
tt_int_op(num_needed, OP_EQ, decide_num_guards(options, 0));
/* The global entry guards smartlist should be empty now. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 0);
/* Walk the nodelist and add all nodes as entry guards. */
our_nodelist = nodelist_get_list();
tt_int_op(smartlist_len(our_nodelist), OP_EQ, HELPER_NUMBER_OF_DESCRIPTORS);
SMARTLIST_FOREACH_BEGIN(our_nodelist, const node_t *, node) {
const node_t *node_tmp;
node_tmp = add_an_entry_guard(gs, node, 0, 1, 0, 0);
tt_assert(node_tmp);
} SMARTLIST_FOREACH_END(node);
/* Make sure the nodes were added as entry guards. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ,
HELPER_NUMBER_OF_DESCRIPTORS);
/* Ensure that all the possible entry guards are enough to satisfy us. */
tt_int_op(smartlist_len(all_entry_guards), OP_GE, num_needed);
/* Walk the entry guard list for some sanity checking */
SMARTLIST_FOREACH_BEGIN(all_entry_guards, const entry_guard_t *, entry) {
/* Since we called add_an_entry_guard() with 'for_discovery' being
False, all guards should have made_contact enabled. */
tt_int_op(entry->made_contact, OP_EQ, 1);
} SMARTLIST_FOREACH_END(entry);
/* First, try to get some fast guards. This should fail. */
retval = populate_live_entry_guards(live_entry_guards,
all_entry_guards,
NULL,
NO_DIRINFO, /* Don't care about DIRINFO*/
0, 0,
1); /* We want fast guard! */
tt_int_op(retval, OP_EQ, 0);
tt_int_op(smartlist_len(live_entry_guards), OP_EQ, 0);
/* Now try to get some stable guards. This should fail too. */
retval = populate_live_entry_guards(live_entry_guards,
all_entry_guards,
NULL,
NO_DIRINFO,
0,
1, /* We want stable guard! */
0);
tt_int_op(retval, OP_EQ, 0);
tt_int_op(smartlist_len(live_entry_guards), OP_EQ, 0);
/* Now try to get any guard we can find. This should succeed. */
retval = populate_live_entry_guards(live_entry_guards,
all_entry_guards,
NULL,
NO_DIRINFO,
0, 0, 0); /* No restrictions! */
/* Since we had more than enough guards in 'all_entry_guards', we
should have added 'num_needed' of them to live_entry_guards.
'retval' should be 1 since we now have enough live entry guards
to pick one. */
tt_int_op(retval, OP_EQ, 1);
tt_int_op(smartlist_len(live_entry_guards), OP_EQ, num_needed);
done:
smartlist_free(live_entry_guards);
}
/* Test populate_live_entry_guards() for 1 guard node. */
static void
test_populate_live_entry_guards_1guard(void *arg)
{
(void) arg;
populate_live_entry_guards_test_helper(1);
}
/* Test populate_live_entry_guards() for 3 guard nodes. */
static void
test_populate_live_entry_guards_3guards(void *arg)
{
(void) arg;
populate_live_entry_guards_test_helper(3);
}
/** Append some EntryGuard lines to the Tor state at <b>state</b>.
<b>entry_guard_lines</b> is a smartlist containing 2-tuple
smartlists that carry the key and values of the statefile.
As an example:
entry_guard_lines =
(("EntryGuard", "name 67E72FF33D7D41BF11C569646A0A7B4B188340DF DirCache"),
("EntryGuardDownSince", "2014-06-07 16:02:46 2014-06-07 16:02:46"))
*/
static void
state_insert_entry_guard_helper(or_state_t *state,
smartlist_t *entry_guard_lines)
{
config_line_t **next, *line;
next = &state->EntryGuards;
*next = NULL;
/* Loop over all the state lines in the smartlist */
SMARTLIST_FOREACH_BEGIN(entry_guard_lines, const smartlist_t *,state_lines) {
/* Get key and value for each line */
const char *state_key = smartlist_get(state_lines, 0);
const char *state_value = smartlist_get(state_lines, 1);
*next = line = tor_malloc_zero(sizeof(config_line_t));
line->key = tor_strdup(state_key);
tor_asprintf(&line->value, "%s", state_value);
next = &(line->next);
} SMARTLIST_FOREACH_END(state_lines);
}
/** Free memory occupied by <b>entry_guard_lines</b>. */
static void
state_lines_free(smartlist_t *entry_guard_lines)
{
SMARTLIST_FOREACH_BEGIN(entry_guard_lines, smartlist_t *, state_lines) {
char *state_key = smartlist_get(state_lines, 0);
char *state_value = smartlist_get(state_lines, 1);
tor_free(state_key);
tor_free(state_value);
smartlist_free(state_lines);
} SMARTLIST_FOREACH_END(state_lines);
smartlist_free(entry_guard_lines);
}
/* Tests entry_guards_parse_state(). It creates a fake Tor state with
a saved entry guard and makes sure that Tor can parse it and
creates the right entry node out of it.
*/
static void
test_entry_guards_parse_state_simple(void *arg)
{
or_options_t *options = get_options_mutable();
options->UseDeprecatedGuardAlgorithm = 1;
or_state_t *state = or_state_new();
const smartlist_t *all_entry_guards = get_entry_guards();
smartlist_t *entry_state_lines = smartlist_new();
char *msg = NULL;
int retval;
/* Details of our fake guard node */
const char *nickname = "hagbard";
const char *fpr = "B29D536DD1752D542E1FBB3C9CE4449D51298212";
const char *tor_version = "0.2.5.3-alpha-dev";
const char *added_at = get_yesterday_date_str();
const char *unlisted_since = "2014-06-08 16:16:50";
(void) arg;
/* The global entry guards smartlist should be empty now. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 0);
{ /* Prepare the state entry */
/* Prepare the smartlist to hold the key/value of each line */
smartlist_t *state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuard");
smartlist_add_asprintf(state_line, "%s %s %s", nickname, fpr, "DirCache");
smartlist_add(entry_state_lines, state_line);
state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuardAddedBy");
smartlist_add_asprintf(state_line, "%s %s %s", fpr, tor_version, added_at);
smartlist_add(entry_state_lines, state_line);
state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuardUnlistedSince");
smartlist_add_asprintf(state_line, "%s", unlisted_since);
smartlist_add(entry_state_lines, state_line);
}
/* Inject our lines in the state */
state_insert_entry_guard_helper(state, entry_state_lines);
/* Parse state */
retval = entry_guards_parse_state(state, 1, &msg);
tt_int_op(retval, OP_GE, 0);
/* Test that the guard was registered.
We need to re-get the entry guard list since its pointer was
overwritten in entry_guards_parse_state(). */
all_entry_guards = get_entry_guards();
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 1);
{ /* Test the entry guard structure */
char hex_digest[1024];
char str_time[1024];
const entry_guard_t *e = smartlist_get(all_entry_guards, 0);
tt_str_op(e->nickname, OP_EQ, nickname); /* Verify nickname */
base16_encode(hex_digest, sizeof(hex_digest),
e->identity, DIGEST_LEN);
tt_str_op(hex_digest, OP_EQ, fpr); /* Verify fingerprint */
tt_assert(e->is_dir_cache); /* Verify dirness */
tt_str_op(e->chosen_by_version, OP_EQ, tor_version); /* Verify version */
tt_assert(e->made_contact); /* All saved guards have been contacted */
tt_assert(e->bad_since); /* Verify bad_since timestamp */
format_iso_time(str_time, e->bad_since);
tt_str_op(str_time, OP_EQ, unlisted_since);
/* The rest should be unset */
tt_assert(!e->unreachable_since);
tt_assert(!e->can_retry);
tt_assert(!e->pb.path_bias_noticed);
tt_assert(!e->pb.path_bias_warned);
tt_assert(!e->pb.path_bias_extreme);
tt_assert(!e->pb.path_bias_disabled);
tt_assert(!e->pb.path_bias_use_noticed);
tt_assert(!e->pb.path_bias_use_extreme);
tt_assert(!e->last_attempted);
}
done:
state_lines_free(entry_state_lines);
or_state_free(state);
tor_free(msg);
}
/** Similar to test_entry_guards_parse_state_simple() but aims to test
the PathBias-related details of the entry guard. */
static void
test_entry_guards_parse_state_pathbias(void *arg)
{
or_options_t *options = get_options_mutable();
options->UseDeprecatedGuardAlgorithm = 1;
or_state_t *state = or_state_new();
const smartlist_t *all_entry_guards = get_entry_guards();
char *msg = NULL;
int retval;
smartlist_t *entry_state_lines = smartlist_new();
/* Path bias details of the fake guard */
const double circ_attempts = 9;
const double circ_successes = 8;
const double successful_closed = 4;
const double collapsed = 2;
const double unusable = 0;
const double timeouts = 1;
(void) arg;
/* The global entry guards smartlist should be empty now. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 0);
{ /* Prepare the state entry */
/* Prepare the smartlist to hold the key/value of each line */
smartlist_t *state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuard");
smartlist_add_asprintf(state_line,
"givethanks B29D536DD1752D542E1FBB3C9CE4449D51298212 NoDirCache");
smartlist_add(entry_state_lines, state_line);
state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuardAddedBy");
smartlist_add_asprintf(state_line,
"B29D536DD1752D542E1FBB3C9CE4449D51298212 0.2.5.3-alpha-dev "
"%s", get_yesterday_date_str());
smartlist_add(entry_state_lines, state_line);
state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuardUnlistedSince");
smartlist_add_asprintf(state_line, "2014-06-08 16:16:50");
smartlist_add(entry_state_lines, state_line);
state_line = smartlist_new();
smartlist_add_asprintf(state_line, "EntryGuardPathBias");
smartlist_add_asprintf(state_line, "%f %f %f %f %f %f",
circ_attempts, circ_successes, successful_closed,
collapsed, unusable, timeouts);
smartlist_add(entry_state_lines, state_line);
}
/* Inject our lines in the state */
state_insert_entry_guard_helper(state, entry_state_lines);
/* Parse state */
retval = entry_guards_parse_state(state, 1, &msg);
tt_int_op(retval, OP_GE, 0);
/* Test that the guard was registered */
all_entry_guards = get_entry_guards();
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 1);
{ /* Test the path bias of this guard */
const entry_guard_t *e = smartlist_get(all_entry_guards, 0);
tt_assert(!e->is_dir_cache);
tt_assert(!e->can_retry);
/* XXX tt_double_op doesn't support equality. Cast to int for now. */
tt_int_op((int)e->pb.circ_attempts, OP_EQ, (int)circ_attempts);
tt_int_op((int)e->pb.circ_successes, OP_EQ, (int)circ_successes);
tt_int_op((int)e->pb.successful_circuits_closed, OP_EQ,
(int)successful_closed);
tt_int_op((int)e->pb.timeouts, OP_EQ, (int)timeouts);
tt_int_op((int)e->pb.collapsed_circuits, OP_EQ, (int)collapsed);
tt_int_op((int)e->pb.unusable_circuits, OP_EQ, (int)unusable);
}
done:
or_state_free(state);
state_lines_free(entry_state_lines);
tor_free(msg);
}
/* Simple test of entry_guards_set_from_config() by specifying a
particular EntryNode and making sure it gets picked. */
static void
test_entry_guards_set_from_config(void *arg)
{
or_options_t *options = get_options_mutable();
options->UseDeprecatedGuardAlgorithm = 1;
guard_selection_t *gs = get_guard_selection_info();
const smartlist_t *all_entry_guards =
get_entry_guards_for_guard_selection(gs);
const char *entrynodes_str = "test003r";
const node_t *chosen_entry = NULL;
int retval;
(void) arg;
/* Prase EntryNodes as a routerset. */
options->EntryNodes = routerset_new();
retval = routerset_parse(options->EntryNodes,
entrynodes_str,
"test_entrynodes");
tt_int_op(retval, OP_GE, 0);
/* Read nodes from EntryNodes */
entry_guards_set_from_config(gs, options);
/* Test that only one guard was added. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 1);
/* Make sure it was the guard we specified. */
chosen_entry = choose_random_entry(NULL);
tt_str_op(chosen_entry->ri->nickname, OP_EQ, entrynodes_str);
done:
routerset_free(options->EntryNodes);
}
static void
test_entry_is_time_to_retry(void *arg)
{
entry_guard_t *test_guard;
time_t now;
int retval;
(void)arg;
now = time(NULL);
test_guard = tor_malloc_zero(sizeof(entry_guard_t));
test_guard->last_attempted = now - 10;
test_guard->unreachable_since = now - 1;
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->unreachable_since = now - (6*60*60 - 1);
test_guard->last_attempted = now - (60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->last_attempted = now - (60*60 - 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,0);
test_guard->unreachable_since = now - (6*60*60 + 1);
test_guard->last_attempted = now - (4*60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->unreachable_since = now - (3*24*60*60 - 1);
test_guard->last_attempted = now - (4*60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->unreachable_since = now - (3*24*60*60 + 1);
test_guard->last_attempted = now - (18*60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->unreachable_since = now - (7*24*60*60 - 1);
test_guard->last_attempted = now - (18*60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->last_attempted = now - (18*60*60 - 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,0);
test_guard->unreachable_since = now - (7*24*60*60 + 1);
test_guard->last_attempted = now - (36*60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
test_guard->unreachable_since = now - (7*24*60*60 + 1);
test_guard->last_attempted = now - (36*60*60 + 1);
retval = entry_is_time_to_retry(test_guard,now);
tt_int_op(retval,OP_EQ,1);
done:
tor_free(test_guard);
}
/** XXX Do some tests that entry_is_live() */
static void
test_entry_is_live(void *arg)
{
smartlist_t *our_nodelist = NULL;
guard_selection_t *gs = get_guard_selection_info();
const smartlist_t *all_entry_guards =
get_entry_guards_for_guard_selection(gs);
const node_t *test_node = NULL;
const entry_guard_t *test_entry = NULL;
const char *msg;
int which_node;
(void) arg;
/* The global entry guards smartlist should be empty now. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ, 0);
/* Walk the nodelist and add all nodes as entry guards. */
our_nodelist = nodelist_get_list();
tt_int_op(smartlist_len(our_nodelist), OP_EQ, HELPER_NUMBER_OF_DESCRIPTORS);
SMARTLIST_FOREACH_BEGIN(our_nodelist, const node_t *, node) {
const node_t *node_tmp;
node_tmp = add_an_entry_guard(gs, node, 0, 1, 0, 0);
tt_assert(node_tmp);
tt_int_op(node->is_stable, OP_EQ, 0);
tt_int_op(node->is_fast, OP_EQ, 0);
} SMARTLIST_FOREACH_END(node);
/* Make sure the nodes were added as entry guards. */
tt_int_op(smartlist_len(all_entry_guards), OP_EQ,
HELPER_NUMBER_OF_DESCRIPTORS);
/* Now get a random test entry that we will use for this unit test. */
which_node = 3; /* (chosen by fair dice roll) */
test_entry = smartlist_get(all_entry_guards, which_node);
/* Let's do some entry_is_live() tests! */
/* Require the node to be stable, but it's not. Should fail.
Also enable 'assume_reachable' because why not. */
test_node = entry_is_live(test_entry,
ENTRY_NEED_UPTIME | ENTRY_ASSUME_REACHABLE,
&msg);
tt_assert(!test_node);
/* Require the node to be fast, but it's not. Should fail. */
test_node = entry_is_live(test_entry,
ENTRY_NEED_CAPACITY | ENTRY_ASSUME_REACHABLE,
&msg);
tt_assert(!test_node);
/* Don't impose any restrictions on the node. Should succeed. */
test_node = entry_is_live(test_entry, 0, &msg);
tt_assert(test_node);
tt_ptr_op(test_node, OP_EQ, node_get_by_id(test_entry->identity));
/* Require descriptor for this node. It has one so it should succeed. */
test_node = entry_is_live(test_entry, ENTRY_NEED_DESCRIPTOR, &msg);
tt_assert(test_node);
tt_ptr_op(test_node, OP_EQ, node_get_by_id(test_entry->identity));
done:
; /* XXX */
}
#endif
#define TEST_IPV4_ADDR "123.45.67.89"
#define TEST_IPV6_ADDR "[1234:5678:90ab:cdef::]"
@ -1475,12 +749,7 @@ test_entry_guard_parse_from_state_broken(void *arg)
tt_int_op(smartlist_len(gs_df->sampled_entry_guards), OP_EQ, 1);
guard_selection_t *gs_legacy =
get_guard_selection_by_name("legacy", GS_TYPE_LEGACY, 0);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
tt_assert(gs_legacy != NULL);
tt_int_op(smartlist_len(gs_legacy->chosen_entry_guards), OP_EQ, 0);
#else
tt_assert(gs_legacy == NULL);
#endif
done:
config_free_lines(lines);
@ -3361,12 +2630,6 @@ test_enty_guard_should_expire_waiting(void *arg)
tor_free(fake_state);
}
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
static const struct testcase_setup_t fake_network = {
fake_network_setup, fake_network_cleanup
};
#endif
static const struct testcase_setup_t big_fake_network = {
big_fake_network_setup, big_fake_network_cleanup
};
@ -3383,33 +2646,6 @@ static const struct testcase_setup_t upgrade_circuits = {
(void*)(arg) }
struct testcase_t entrynodes_tests[] = {
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
{ "entry_is_time_to_retry", test_entry_is_time_to_retry,
TT_FORK, NULL, NULL },
{ "choose_random_entry_no_guards", test_choose_random_entry_no_guards,
TT_FORK, &fake_network, NULL },
{ "choose_random_entry_one_possible_guard",
test_choose_random_entry_one_possible_guard,
TT_FORK, &fake_network, NULL },
{ "populate_live_entry_guards_1guard",
test_populate_live_entry_guards_1guard,
TT_FORK, &fake_network, NULL },
{ "populate_live_entry_guards_3guards",
test_populate_live_entry_guards_3guards,
TT_FORK, &fake_network, NULL },
{ "entry_guards_parse_state_simple",
test_entry_guards_parse_state_simple,
TT_FORK, &fake_network, NULL },
{ "entry_guards_parse_state_pathbias",
test_entry_guards_parse_state_pathbias,
TT_FORK, &fake_network, NULL },
{ "entry_guards_set_from_config",
test_entry_guards_set_from_config,
TT_FORK, &fake_network, NULL },
{ "entry_is_live",
test_entry_is_live,
TT_FORK, &fake_network, NULL },
#endif
{ "node_preferred_orport",
test_node_preferred_orport,
0, NULL, NULL },

84
src/test/test_routerlist.c
View File

@ -204,55 +204,6 @@ mock_usable_consensus_flavor(void)
return mock_usable_consensus_flavor_value;
}
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
static smartlist_t *mock_is_guard_list = NULL;
static int
mock_is_node_used_as_guard(const node_t *n)
{
if (mock_is_guard_list) {
SMARTLIST_FOREACH_BEGIN(mock_is_guard_list, node_t *, e) {
if (e == n) return 1;
} SMARTLIST_FOREACH_END(e);
}
return 0;
}
static void
mark_node_used_as_guard(node_t *n)
{
if (!n) return;
if (!mock_is_guard_list) {
mock_is_guard_list = smartlist_new();
}
if (!mock_is_node_used_as_guard(n)) {
smartlist_add(mock_is_guard_list, n);
}
}
static void
mark_node_unused_as_guard(node_t *n)
{
if (!n) return;
if (!mock_is_guard_list) return;
smartlist_remove(mock_is_guard_list, n);
}
static void
clear_mock_guard_list(void)
{
if (mock_is_guard_list) {
smartlist_free(mock_is_guard_list);
mock_is_guard_list = NULL;
}
}
#endif
static void
test_router_pick_directory_server_impl(void *arg)
{
@ -273,9 +224,6 @@ test_router_pick_directory_server_impl(void *arg)
(void)arg;
MOCK(usable_consensus_flavor, mock_usable_consensus_flavor);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
MOCK(is_node_used_as_guard, mock_is_node_used_as_guard);
#endif
/* With no consensus, we must be bootstrapping, regardless of time or flavor
*/
@ -388,34 +336,6 @@ test_router_pick_directory_server_impl(void *arg)
node_router1->is_valid = 1;
node_router3->is_valid = 1;
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
flags |= PDS_FOR_GUARD;
mark_node_used_as_guard(node_router1);
mark_node_used_as_guard(node_router2);
mark_node_used_as_guard(node_router3);
rs = router_pick_directory_server_impl(V3_DIRINFO, flags, NULL);
tt_assert(rs == NULL);
mark_node_unused_as_guard(node_router1);
rs = router_pick_directory_server_impl(V3_DIRINFO, flags, NULL);
tt_assert(rs != NULL);
tt_assert(tor_memeq(rs->identity_digest, router1_id, DIGEST_LEN));
rs = NULL;
mark_node_unused_as_guard(node_router2);
mark_node_unused_as_guard(node_router3);
#endif
/* One not valid, one guard. This should leave one remaining */
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
node_router1->is_valid = 0;
mark_node_used_as_guard(node_router2);
rs = router_pick_directory_server_impl(V3_DIRINFO, flags, NULL);
tt_assert(rs != NULL);
tt_assert(tor_memeq(rs->identity_digest, router3_id, DIGEST_LEN));
rs = NULL;
node_router1->is_valid = 1;
mark_node_unused_as_guard(node_router2);
#endif
/* Manipulate overloaded */
node_router2->rs->last_dir_503_at = now;
@ -477,10 +397,6 @@ test_router_pick_directory_server_impl(void *arg)
done:
UNMOCK(usable_consensus_flavor);
#ifdef ENABLE_LEGACY_GUARD_ALGORITHM
UNMOCK(is_node_used_as_guard);
clear_mock_guard_list();
#endif
if (router1_id)
tor_free(router1_id);