forked from Green-Sky/tomato
596ea37298
e58eb27a8 fix(toxav): remove extra copy of video frame on encode Tested and works, but there might be alignment issues and other stuff. 206ea3530 refactor: Explicitly pass dependencies to constructors. 7cefa93cf fix(toxencryptsave): Wipe salt and passkey after usage. 7c3be2342 refactor: Add file/line to tox-bootstrapd logging. f84e8cdce refactor: Move loglogdata out of network.c. 390f7db06 refactor: Move random and memory OS-specifics to `os_*` files. REVERT: 640e6cace fix(toxav): remove extra copy of video frame on encode Tested and works, but there might be alignment issues and other stuff. git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: e58eb27a84f9fa0cd996868e079f39e90a5c04b6
110 lines
4.8 KiB
C
110 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2019-2025 The TokTok team.
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*/
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#ifndef C_TOXCORE_TOXCORE_FORWARDING_H
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#define C_TOXCORE_TOXCORE_FORWARDING_H
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#include "DHT.h"
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#include "attributes.h"
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#include "crypto_core.h"
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#include "logger.h"
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#include "mem.h"
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#include "mono_time.h"
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#include "network.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SENDBACK_IPPORT 0
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#define SENDBACK_FORWARD 1
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#define SENDBACK_TCP 2
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#define MAX_SENDBACK_SIZE (0xff - 1)
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#define MAX_FORWARD_DATA_SIZE (MAX_UDP_PACKET_SIZE - (1 + 1 + MAX_SENDBACK_SIZE))
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#define MAX_FORWARD_CHAIN_LENGTH 4
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#define MAX_PACKED_IPPORT_SIZE (1 + SIZE_IP6 + sizeof(uint16_t))
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typedef struct Forwarding Forwarding;
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/**
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* @brief Send data to forwarder for forwarding via chain of dht nodes.
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* Destination is last key in the chain.
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*
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* @param data Must be of length at most MAX_FORWARD_DATA_SIZE.
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* @param chain_length Number of intermediate nodes in chain.
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* Must be at least 1 and at most MAX_FORWARD_CHAIN_LENGTH.
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* @param chain_keys Public keys of chain nodes. Must be of length
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* `chain_length * CRYPTO_PUBLIC_KEY_SIZE`.
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*
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* @return true on success, false otherwise.
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*/
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bool send_forward_request(const Networking_Core *_Nonnull net, const IP_Port *_Nonnull forwarder, const uint8_t *_Nonnull chain_keys, uint16_t chain_length, const uint8_t *_Nonnull data,
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uint16_t data_length);
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/** Returns size of packet written by create_forward_chain_packet. */
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uint16_t forward_chain_packet_size(uint16_t chain_length, uint16_t data_length);
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/**
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* @brief Create forward request packet for forwarding data via chain of dht nodes.
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* Destination is last key in the chain.
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*
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* @param data Must be of length at most MAX_FORWARD_DATA_SIZE.
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* @param chain_length Number of intermediate nodes in chain.
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* Must be at least 1 and at most MAX_FORWARD_CHAIN_LENGTH.
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* @param chain_keys Public keys of chain nodes. Must be of length
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* `chain_length * CRYPTO_PUBLIC_KEY_SIZE`.
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* @param packet Must be of size at least
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* `forward_chain_packet_size(chain_length, data_length)` bytes.
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*
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* @return true on success, false otherwise.
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*/
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bool create_forward_chain_packet(const uint8_t *_Nonnull chain_keys, uint16_t chain_length, const uint8_t *_Nonnull data, uint16_t data_length, uint8_t *_Nonnull packet);
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/**
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* @brief Send reply to forwarded packet via forwarder.
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* @param sendback Must be of size at most MAX_SENDBACK_SIZE.
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* @param data Must be of size at most MAX_FORWARD_DATA_SIZE.
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*
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* @return true on success, false otherwise.
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*/
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bool forward_reply(const Networking_Core *_Nonnull net, const IP_Port *_Nonnull forwarder, const uint8_t *_Nonnull sendback, uint16_t sendback_length, const uint8_t *_Nonnull data,
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uint16_t length);
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/**
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* @brief Set callback to handle a forwarded request.
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* To reply to the packet, callback should use `forward_reply()` to send a reply
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* forwarded via forwarder, passing the provided sendback.
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*/
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typedef void forwarded_request_cb(void *_Nullable object, const IP_Port *_Nonnull forwarder, const uint8_t *_Nonnull sendback,
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uint16_t sendback_length, const uint8_t *_Nonnull data,
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uint16_t length, void *_Nullable userdata);
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void set_callback_forwarded_request(Forwarding *_Nonnull forwarding, forwarded_request_cb *_Nullable function, void *_Nullable object);
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/** @brief Set callback to handle a forwarded response. */
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typedef void forwarded_response_cb(void *_Nullable object, const uint8_t *_Nonnull data, uint16_t length, void *_Nullable userdata);
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void set_callback_forwarded_response(Forwarding *_Nonnull forwarding, forwarded_response_cb *_Nullable function, void *_Nullable object);
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/** @brief Send forwarding packet to dest with given sendback data and data. */
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bool send_forwarding(const Forwarding *_Nonnull forwarding, const IP_Port *_Nonnull dest,
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const uint8_t *_Nullable sendback_data, uint16_t sendback_data_len,
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const uint8_t *_Nonnull data, uint16_t length);
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typedef bool forward_reply_cb(void *_Nullable object, const uint8_t *_Nullable sendback_data, uint16_t sendback_data_len,
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const uint8_t *_Nonnull data, uint16_t length);
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/**
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* @brief Set callback to handle a forward reply with an otherwise unhandled
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* sendback.
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*/
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void set_callback_forward_reply(Forwarding *_Nonnull forwarding, forward_reply_cb *_Nullable function, void *_Nullable object);
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Forwarding *_Nullable new_forwarding(const Logger *_Nonnull log, const Memory *_Nonnull mem, const Random *_Nonnull rng, const Mono_Time *_Nonnull mono_time, DHT *_Nonnull dht,
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Networking_Core *_Nonnull net);
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void kill_forwarding(Forwarding *_Nullable forwarding);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* C_TOXCORE_TOXCORE_FORWARDING_H */
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