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feat: add forwarding and announce request handling
This is the "server-side" part of the new friend finding system, allowing DHT nodes to store small amounts of data and permit searching for it. A forwarding (proxying) mechanism allows this to be used by TCP clients, and deals with non-transitivity in the network.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| #include <stdint.h> | ||
| #include <string.h> | ||
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| #include "../toxcore/announce.h" | ||
| #include "../toxcore/tox.h" | ||
| #include "../testing/misc_tools.h" | ||
| #include "../toxcore/mono_time.h" | ||
| #include "../toxcore/forwarding.h" | ||
| #include "../toxcore/net_crypto.h" | ||
| #include "../toxcore/util.h" | ||
| #include "auto_test_support.h" | ||
| #include "check_compat.h" | ||
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| static void test_bucketnum(void) | ||
| { | ||
| const Random *rng = system_random(); | ||
| ck_assert(rng != nullptr); | ||
| uint8_t key1[CRYPTO_PUBLIC_KEY_SIZE], key2[CRYPTO_PUBLIC_KEY_SIZE]; | ||
| random_bytes(rng, key1, sizeof(key1)); | ||
| memcpy(key2, key1, CRYPTO_PUBLIC_KEY_SIZE); | ||
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| ck_assert_msg(get_bucketnum(key1, key2) == 0, "Bad bucketnum"); | ||
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| key2[4] ^= 0x09; | ||
| key2[5] ^= 0xc5; | ||
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| ck_assert_msg(get_bucketnum(key1, key2) == 7, "Bad bucketnum"); | ||
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| key2[4] ^= 0x09; | ||
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| ck_assert_msg(get_bucketnum(key1, key2) == 17, "Bad bucketnum"); | ||
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| key2[5] ^= 0xc5; | ||
| key2[31] ^= 0x09; | ||
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| ck_assert_msg(get_bucketnum(key1, key2) == 4, "Bad bucketnum"); | ||
| } | ||
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| typedef struct Announce_Test_Data { | ||
| uint8_t data[MAX_ANNOUNCEMENT_SIZE]; | ||
| uint16_t length; | ||
| bool passed; | ||
| } Announce_Test_Data; | ||
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| static void test_announce_data(void *object, const uint8_t *data, uint16_t length) | ||
| { | ||
| Announce_Test_Data *test_data = (Announce_Test_Data *) object; | ||
| test_data->passed = test_data->length == length && memcmp(test_data->data, data, length) == 0; | ||
| } | ||
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| static void test_store_data(void) | ||
| { | ||
| const Random *rng = system_random(); | ||
| ck_assert(rng != nullptr); | ||
| const Network *ns = system_network(); | ||
| ck_assert(ns != nullptr); | ||
| Logger *log = logger_new(); | ||
| ck_assert(log != nullptr); | ||
| logger_callback_log(log, (logger_cb *)print_debug_log, nullptr, nullptr); | ||
| Mono_Time *mono_time = mono_time_new(); | ||
| Networking_Core *net = new_networking_no_udp(log, ns); | ||
| DHT *dht = new_dht(log, rng, ns, mono_time, net, true, true); | ||
| Forwarding *forwarding = new_forwarding(log, rng, mono_time, dht); | ||
| Announcements *announce = new_announcements(log, rng, mono_time, forwarding); | ||
| ck_assert(announce != nullptr); | ||
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| /* Just to prevent CI from complaining that set_synch_offset is unused: */ | ||
| set_synch_offset(announce, 0); | ||
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| Announce_Test_Data test_data; | ||
| random_bytes(rng, test_data.data, sizeof(test_data.data)); | ||
| test_data.length = sizeof(test_data.data); | ||
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| uint8_t key[CRYPTO_PUBLIC_KEY_SIZE]; | ||
| random_bytes(rng, key, sizeof(key)); | ||
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| ck_assert_msg(!on_stored(announce, key, nullptr, nullptr), "Unstored announcement exists"); | ||
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| ck_assert_msg(store_data(announce, key, test_data.data, sizeof(test_data.data), | ||
| MAX_MAX_ANNOUNCEMENT_TIMEOUT), "Failed to store announcement"); | ||
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| ck_assert_msg(on_stored(announce, key, test_announce_data, &test_data), "Failed to get stored announcement"); | ||
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| ck_assert_msg(test_data.passed, "Bad stored announcement data"); | ||
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| const uint8_t *const base = dht_get_self_public_key(dht); | ||
| ck_assert_msg(store_data(announce, base, test_data.data, sizeof(test_data.data), 1), "failed to store base"); | ||
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| uint8_t test_keys[ANNOUNCE_BUCKET_SIZE + 1][CRYPTO_PUBLIC_KEY_SIZE]; | ||
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| for (uint8_t i = 0; i < ANNOUNCE_BUCKET_SIZE + 1; ++i) { | ||
| memcpy(test_keys[i], base, CRYPTO_PUBLIC_KEY_SIZE); | ||
| test_keys[i][i] ^= 1; | ||
| ck_assert_msg(store_data(announce, test_keys[i], test_data.data, sizeof(test_data.data), 1), | ||
| "Failed to store announcement %d", i); | ||
| } | ||
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| ck_assert_msg(on_stored(announce, base, nullptr, nullptr), "base was evicted"); | ||
| ck_assert_msg(!on_stored(announce, test_keys[0], nullptr, nullptr), "furthest was not evicted"); | ||
| ck_assert_msg(!store_data(announce, test_keys[0], nullptr, 0, 1), "furthest evicted closer"); | ||
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| kill_announcements(announce); | ||
| kill_forwarding(forwarding); | ||
| kill_dht(dht); | ||
| kill_networking(net); | ||
| mono_time_free(mono_time); | ||
| logger_kill(log); | ||
| } | ||
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| static void basic_announce_tests(void) | ||
| { | ||
| test_bucketnum(); | ||
| test_store_data(); | ||
| } | ||
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| int main(void) | ||
| { | ||
| setvbuf(stdout, nullptr, _IONBF, 0); | ||
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| basic_announce_tests(); | ||
| return 0; | ||
| } |
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