/* Function to send onion packet via TCP and UDP.
*
* return -1 on failure.
* return 0 on success.
*/
static int send_onion_packet_tcp_udp(const Onion_Client *onion_c, const Onion_Path *path, IP_Port dest,
const uint8_t *data, uint32_t length)
{
if (path->ip_port1.ip.family == AF_INET || path->ip_port1.ip.family == AF_INET6) {
uint8_t packet[ONION_MAX_PACKET_SIZE];
int len = create_onion_packet(packet, sizeof(packet), path, dest, data, length);
if (len == -1)
return -1;
if (sendpacket(onion_c->net, path->ip_port1, packet, len) != len)
return -1;
return 0;
} else if (path->ip_port1.ip.family == TCP_FAMILY) {
uint8_t packet[ONION_MAX_PACKET_SIZE];
int len = create_onion_packet_tcp(packet, sizeof(packet), path, dest, data, length);
if (len == -1)
return -1;
return send_tcp_onion_request(onion_c->c, packet, len);
} else {
return -1;
}
}
/* 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;
}
/* Create and send a onion packet.
*
* Use Onion_Path path to send data of length to dest.
* Maximum length of data is ONION_MAX_DATA_SIZE.
*
* return -1 on failure.
* return 0 on success.
*/
int send_onion_packet(Networking_Core *net, const Onion_Path *path, IP_Port dest, const uint8_t *data, uint16_t length)
{
uint8_t packet[ONION_MAX_PACKET_SIZE];
int len = create_onion_packet(packet, sizeof(packet), path, dest, data, length);
if (len == -1)
return -1;
if (sendpacket(net, path->ip_port1, packet, len) != len)
return -1;
return 0;
}
/* Create and send an onion data request packet.
*
* path is the path the request will take before it is sent to dest.
* (if dest knows the person with the public_key they should
* send the packet to that person in the form of a response)
*
* public_key is the real public key of the node which we want to send the data of length length to.
* encrypt_public_key is the public key used to encrypt the data packet.
*
* nonce is the nonce to encrypt this packet with
*
* return -1 on failure.
* return 0 on success.
*/
int send_data_request(Networking_Core *net, const Onion_Path *path, IP_Port dest, const uint8_t *public_key,
const uint8_t *encrypt_public_key, const uint8_t *nonce, const uint8_t *data, uint16_t length)
{
uint8_t request[ONION_MAX_DATA_SIZE];
int len = create_data_request(request, sizeof(request), public_key, encrypt_public_key, nonce, data, length);
if (len == -1) {
return -1;
}
uint8_t packet[ONION_MAX_PACKET_SIZE];
len = create_onion_packet(packet, sizeof(packet), path, dest, request, len);
if (len == -1) {
return -1;
}
if (sendpacket(net, path->ip_port1, packet, len) != len) {
return -1;
}
return 0;
}
