END_TEST
START_TEST(test_dht_state_saveloadsave)
{
/* validate that:
* a) saving stays within the confined space
* b) a save()d state can be load()ed back successfully
* c) a second save() is of equal size
* d) the second save() is of equal content */
size_t i, extra = 64;
size_t size = DHT_size(m->dht);
uint8_t buffer[size + 2 * extra];
memset(buffer, 0xCD, extra);
memset(buffer + extra + size, 0xCD, extra);
DHT_save(m->dht, buffer + extra);
for (i = 0; i < extra; i++) {
ck_assert_msg(buffer[i] == 0xCD, "Buffer underwritten from DHT_save() @%u", i);
ck_assert_msg(buffer[extra + size + i] == 0xCD, "Buffer overwritten from DHT_save() @%u", i);
}
int res = DHT_load(m->dht, buffer + extra, size);
if (res == -1)
ck_assert_msg(res == 0, "Failed to load back stored buffer: res == -1");
else {
char msg[128];
size_t offset = res >> 4;
uint8_t *ptr = buffer + extra + offset;
sprintf(msg, "Failed to load back stored buffer: 0x%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx @%zu/%zu, code %d",
ptr[-2], ptr[-1], ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5], offset, size, res & 0x0F);
ck_assert_msg(res == 0, msg);
}
size_t size2 = DHT_size(m->dht);
ck_assert_msg(size == size2, "Messenger \"grew\" in size from a store/load cycle: %u -> %u", size, size2);
uint8_t buffer2[size2];
DHT_save(m->dht, buffer2);
ck_assert_msg(!memcmp(buffer + extra, buffer2, size), "DHT state changed by store/load/store cycle");
}
/* returns the size of the messenger data (for saving) */
uint32_t Messenger_size(Messenger *m)
{
return crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES
+ sizeof(uint32_t) // nospam
+ sizeof(uint32_t) // DHT size
+ DHT_size() // DHT itself
+ sizeof(uint32_t) // Friendlist size
+ sizeof(Friend) * m->numfriends // Friendlist itself
+ sizeof(uint16_t) // Own nickname length
+ m->name_length // Own nickname
;
}
/* save the messenger in data of size Messenger_size() */
void Messenger_save(uint8_t *data)
{
save_keys(data);
data += crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES;
uint32_t size = DHT_size();
memcpy(data, &size, sizeof(size));
data += sizeof(size);
DHT_save(data);
data += size;
size = sizeof(Friend) * numfriends;
memcpy(data, &size, sizeof(size));
data += sizeof(size);
memcpy(data, friendlist, sizeof(Friend) * numfriends);
}
/* save the messenger in data of size Messenger_size() */
void Messenger_save(Messenger *m, uint8_t *data)
{
save_keys(data);
data += crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES;
uint32_t nospam = get_nospam();
memcpy(data, &nospam, sizeof(nospam));
data += sizeof(nospam);
uint32_t size = DHT_size();
memcpy(data, &size, sizeof(size));
data += sizeof(size);
DHT_save(data);
data += size;
size = sizeof(Friend) * m->numfriends;
memcpy(data, &size, sizeof(size));
data += sizeof(size);
memcpy(data, m->friendlist, sizeof(Friend) * m->numfriends);
data += size;
uint16_t small_size = m->name_length;
memcpy(data, &small_size, sizeof(small_size));
data += sizeof(small_size);
memcpy(data, m->name, small_size);
}
/* returns the size of the messenger data (for saving) */
uint32_t Messenger_size(void)
{
return crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES
+ sizeof(uint32_t) + DHT_size() + sizeof(uint32_t) + sizeof(Friend) * numfriends;
}
