Squashed 'external/toxcore/c-toxcore/' content from commit 67badf69

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 67badf69416a74e74f6d7eb51dd96f37282b8455

auto_tests/overflow_recvq_test.c

@@ -0,0 +1,64 @@
+/* Try to overflow the net_crypto packet buffer.
+ */
+
+#include <stdint.h>
+
+typedef struct State {
+    uint32_t recv_count;
+} State;
+
+#include "auto_test_support.h"
+
+#define NUM_MSGS 40000
+
+static void handle_friend_message(Tox *tox, uint32_t friend_number, Tox_Message_Type type,
+                                  const uint8_t *message, size_t length, void *user_data)
+{
+    const AutoTox *autotox = (AutoTox *)user_data;
+    State *state = (State *)autotox->state;
+    state->recv_count++;
+}
+
+static void net_crypto_overflow_test(AutoTox *autotoxes)
+{
+    tox_callback_friend_message(autotoxes[0].tox, handle_friend_message);
+
+    printf("sending many messages to tox0\n");
+
+    for (uint32_t tox_index = 1; tox_index < 3; tox_index++) {
+        for (uint32_t i = 0; i < NUM_MSGS; i++) {
+            uint8_t message[128] = {0};
+            snprintf((char *)message, sizeof(message), "%u-%u", tox_index, i);
+
+            Tox_Err_Friend_Send_Message err;
+            tox_friend_send_message(autotoxes[tox_index].tox, 0, TOX_MESSAGE_TYPE_NORMAL, message, sizeof message, &err);
+
+            if (err == TOX_ERR_FRIEND_SEND_MESSAGE_SENDQ) {
+                printf("tox%u sent %u messages to friend 0\n", tox_index, i);
+                break;
+            }
+
+            ck_assert_msg(err == TOX_ERR_FRIEND_SEND_MESSAGE_OK,
+                          "tox%u failed to send message number %u: %d", tox_index, i, err);
+        }
+    }
+
+    // TODO(iphydf): Wait until all messages have arrived. Currently, not all
+    // messages arrive, so this test would always fail.
+    for (uint32_t i = 0; i < 200; i++) {
+        iterate_all_wait(autotoxes, 3, ITERATION_INTERVAL);
+    }
+
+    printf("tox%u received %u messages\n", autotoxes[0].index, ((State *)autotoxes[0].state)->recv_count);
+}
+
+int main(void)
+{
+    setvbuf(stdout, nullptr, _IONBF, 0);
+
+    Run_Auto_Options options = default_run_auto_options();
+    options.graph = GRAPH_LINEAR;
+    run_auto_test(nullptr, 3, net_crypto_overflow_test, sizeof(State), &options);
+
+    return 0;
+}