static int client_send_announce_request(Onion_Client *onion_c, uint32_t num, IP_Port dest, const uint8_t *dest_pubkey,
const uint8_t *ping_id, uint32_t pathnum)
{
if (num > onion_c->num_friends)
return -1;
uint64_t sendback;
if (new_sendback(onion_c, num, dest_pubkey, dest, &sendback) == -1)
return -1;
uint8_t zero_ping_id[ONION_PING_ID_SIZE] = {0};
if (ping_id == NULL)
ping_id = zero_ping_id;
Onion_Path path;
Node_format dest_node;
dest_node.ip_port = dest;
memcpy(dest_node.client_id, dest_pubkey, crypto_box_PUBLICKEYBYTES);
if (num == 0) {
if (random_path(onion_c->dht, &onion_c->onion_paths, pathnum, &path) == -1)
return -1;
uint8_t packet[ONION_MAX_PACKET_SIZE];
int len = create_announce_request(packet, sizeof(packet), &path, dest_node, onion_c->c->self_public_key,
onion_c->c->self_secret_key, ping_id, onion_c->c->self_public_key, onion_c->temp_public_key, sendback);
if (len == -1) {
return -1;
}
return send_onion_packet_tcp_udp(onion_c, path.ip_port1, packet, len);
} else {
if (random_path(onion_c->dht, &onion_c->friends_list[num - 1].onion_paths, pathnum, &path) == -1)
return -1;
uint8_t packet[ONION_MAX_PACKET_SIZE];
int len = create_announce_request(packet, sizeof(packet), &path, dest_node,
onion_c->friends_list[num - 1].temp_public_key, onion_c->friends_list[num - 1].temp_secret_key, ping_id,
onion_c->friends_list[num - 1].real_client_id, zero_ping_id, sendback);
if (len == -1) {
return -1;
}
return send_onion_packet_tcp_udp(onion_c, path.ip_port1, packet, len);
}
}
/* Create and send an onion announce request packet.
*
* path is the path the request will take before it is sent to dest.
*
* public_key and secret_key is the kepair which will be used to encrypt the request.
* ping_id is the ping id that will be sent in the request.
* client_id is the client id of the node we are searching for.
* data_public_key is the public key we want others to encrypt their data packets with.
* sendback_data is the data of ONION_ANNOUNCE_SENDBACK_DATA_LENGTH length that we expect to
* receive back in the response.
*
* return -1 on failure.
* return 0 on success.
*/
int send_announce_request(Networking_Core *net, const Onion_Path *path, Node_format dest, const uint8_t *public_key,
const uint8_t *secret_key, const uint8_t *ping_id, const uint8_t *client_id, const uint8_t *data_public_key,
uint64_t sendback_data)
{
uint8_t request[ONION_ANNOUNCE_REQUEST_SIZE];
int len = create_announce_request(request, sizeof(request), dest.public_key, public_key, secret_key, ping_id, client_id,
data_public_key, sendback_data);
if (len != sizeof(request)) {
return -1;
}
uint8_t packet[ONION_MAX_PACKET_SIZE];
len = create_onion_packet(packet, sizeof(packet), path, dest.ip_port, request, sizeof(request));
if (len == -1) {
return -1;
}
if (sendpacket(net, path->ip_port1, packet, len) != len) {
return -1;
}
return 0;
}
static int client_send_announce_request(Onion_Client *onion_c, uint32_t num, IP_Port dest, const uint8_t *dest_pubkey,
const uint8_t *ping_id, uint32_t pathnum)
{
if (num > onion_c->num_friends)
return -1;
uint64_t sendback;
Onion_Path path;
if (num == 0) {
if (random_path(onion_c, &onion_c->onion_paths, pathnum, &path) == -1)
return -1;
} else {
if (random_path(onion_c, &onion_c->friends_list[num - 1].onion_paths, pathnum, &path) == -1)
return -1;
}
if (new_sendback(onion_c, num, dest_pubkey, dest, path.path_num, &sendback) == -1)
return -1;
uint8_t zero_ping_id[ONION_PING_ID_SIZE] = {0};
if (ping_id == NULL)
ping_id = zero_ping_id;
uint8_t request[ONION_ANNOUNCE_REQUEST_SIZE];
int len;
if (num == 0) {
len = create_announce_request(request, sizeof(request), dest_pubkey, onion_c->c->self_public_key,
onion_c->c->self_secret_key, ping_id, onion_c->c->self_public_key, onion_c->temp_public_key, sendback);
} else {
len = create_announce_request(request, sizeof(request), dest_pubkey, onion_c->friends_list[num - 1].temp_public_key,
onion_c->friends_list[num - 1].temp_secret_key, ping_id, onion_c->friends_list[num - 1].real_client_id, zero_ping_id,
sendback);
}
if (len == -1) {
return -1;
}
return send_onion_packet_tcp_udp(onion_c, &path, dest, request, len);
}
