static void x_request_data(void)
{
if (g_pg_next >= DATA_PAGES) {
if (!g_pg_pending) {
x_set_status(x_completed);
return;
}
} else {
int b, has_free_buff = 0;
for (b = 0; b < BUFF_PAGES; ++b) {
if (g_buff_status[b] == x_buff_unused) {
has_free_buff = 1;
if (!x_buff_attach(b)) {
break;
}
}
}
if (!has_free_buff) {
if ((int)(rtc_current() - g_get_pg_tout_ts) > 0) {
x_set_status(x_failed);
return;
}
}
}
send_data_request();
}
/* Send data of length length to friendnum.
* This data will be recieved by the friend using the Onion_Data_Handlers callbacks.
*
* Even if this function succeeds, the friend might not recieve any data.
*
* return the number of packets sent on success
* return -1 on failure.
*/
int send_onion_data(Onion_Client *onion_c, int friend_num, uint8_t *data, uint32_t length)
{
if ((uint32_t)friend_num >= onion_c->num_friends)
return -1;
if (length + DATA_IN_RESPONSE_MIN_SIZE + ONION_DATA_RESPONSE_MIN_SIZE + ONION_SEND_1 > MAX_DATA_SIZE)
return -1;
if (length == 0)
return -1;
uint8_t nonce[crypto_box_NONCEBYTES];
random_nonce(nonce);
uint8_t packet[DATA_IN_RESPONSE_MIN_SIZE + length];
memcpy(packet, onion_c->dht->c->self_public_key, crypto_box_PUBLICKEYBYTES);
int len = encrypt_data(onion_c->friends_list[friend_num].real_client_id, onion_c->dht->c->self_secret_key, nonce, data,
length, packet + crypto_box_PUBLICKEYBYTES);
if ((uint32_t)len + crypto_box_PUBLICKEYBYTES != sizeof(packet))
return -1;
uint32_t i, good_nodes[MAX_ONION_CLIENTS], num_good = 0, num_nodes = 0;
Onion_Path path[MAX_ONION_CLIENTS];
Onion_Node *list_nodes = onion_c->friends_list[friend_num].clients_list;
for (i = 0; i < MAX_ONION_CLIENTS; ++i) {
if (is_timeout(list_nodes[i].timestamp, ONION_NODE_TIMEOUT))
continue;
++num_nodes;
if (list_nodes[i].is_stored) {
if (random_path(onion_c->dht, &onion_c->friends_list[friend_num].onion_paths, ~0, &path[num_good]) == -1)
continue;
good_nodes[num_good] = i;
++num_good;
}
}
if (num_good < (num_nodes / 4) + 1)
return -1;
uint32_t good = 0;
for (i = 0; i < num_good; ++i) {
if (send_data_request(onion_c->net, &path[i], list_nodes[good_nodes[i]].ip_port,
onion_c->friends_list[friend_num].real_client_id, list_nodes[good_nodes[i]].data_public_key, nonce, packet,
sizeof(packet)) == 0)
++good;
}
return good;
}
/* Send data of length length to friendnum.
* This data will be recieved by the friend using the Onion_Data_Handlers callbacks.
*
* Even if this function succeeds, the friend might not recieve any data.
*
* return the number of packets sent on success
* return -1 on failure.
*/
int send_onion_data(Onion_Client *onion_c, int friend_num, uint8_t *data, uint32_t length)
{
if ((uint32_t)friend_num >= onion_c->num_friends)
return -1;
if (length + DATA_IN_RESPONSE_MIN_SIZE + ONION_DATA_RESPONSE_MIN_SIZE + ONION_SEND_1 > MAX_DATA_SIZE)
return -1;
if (length == 0)
return -1;
uint8_t nonce[crypto_box_NONCEBYTES];
new_nonce(nonce);
uint8_t packet[DATA_IN_RESPONSE_MIN_SIZE + length];
memcpy(packet, onion_c->dht->c->self_public_key, crypto_box_PUBLICKEYBYTES);
int len = encrypt_data(onion_c->friends_list[friend_num].real_client_id, onion_c->dht->c->self_secret_key, nonce, data,
length, packet + crypto_box_PUBLICKEYBYTES);
if ((uint32_t)len + crypto_box_PUBLICKEYBYTES != sizeof(packet))
return -1;
uint32_t i, good = 0;
Onion_Node *list_nodes = onion_c->friends_list[friend_num].clients_list;
for (i = 0; i < MAX_ONION_CLIENTS; ++i) {
if (is_timeout(list_nodes[i].timestamp, ONION_NODE_TIMEOUT))
continue;
if (memcmp(list_nodes[i].ping_id, zero_ping, ONION_PING_ID_SIZE) == 0) {
Node_format nodes[4];
if (random_path(onion_c, nodes) == -1)
continue;
memcpy(nodes[3].client_id, list_nodes[i].client_id, crypto_box_PUBLICKEYBYTES);
nodes[3].ip_port = list_nodes[i].ip_port;
if (send_data_request(onion_c->dht, nodes, onion_c->friends_list[friend_num].real_client_id, nonce, packet,
sizeof(packet)) == 0)
++good;
}
}
return good;
}
static inline void x_request_meta(void)
{
BUG_ON(!g_pg_pending);
send_data_request();
}
