forked from Green-Sky/tomato
Green Sky
b2ae9530a4
f1df709b87 feat: add ngc events 1b6c907235 refactor: Make event dispatch ordered by receive time. b7f9367f6f test: Upgrade cppcheck, fix some warnings. 766e62bc89 chore: Use `pkg_search_module` directly in cmake. 00ff078f91 cleanup: Use target_link_libraries directly in cmake. c58928cc89 chore: Add `IMPORTED_TARGET` to pkg-config packages. 895a6af122 cleanup: Remove NaCl support. 41dfb1c1c0 fix: unpack enum function names in event impl generator 447666d1a1 chore: Disable targets for cross-compilation. 572924e924 chore: Build a docker image with coverage info in it. 415cb78f5e cleanup: Some portability/warning fixes for Windows builds. 425216d9ec fix: Correct a use-after-free and fix some memory leaks. 4b1cfa3e08 refactor: Change all enum-like `#define` sequences into enums. d3c2704fa9 chore: Fix make_single_file to support core-only. 0ce46b644e refactor: Change the `TCP_PACKET_*` defines into an enum. 22cd38ad50 adopt event impl generation tool to #2392 f31ea1088a add the event impl generation tool 4e603bb613 refactor: Use `enum-from-int` rule from tokstyle. 19d8f180d6 chore: Update github actions `uses`. 6a895be0c7 test: Make esp32 build actually try to instantiate tox. 65d09c9bfb cleanup: Remove test net support. REVERT: e29e185c03 feat: add ngc events git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: f1df709b8792da4c0e946d826b11df77d565064d
126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2019-2022 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 "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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non_null()
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DHT *forwarding_get_dht(const 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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non_null()
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bool send_forward_request(const Networking_Core *net, const IP_Port *forwarder,
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const uint8_t *chain_keys, uint16_t chain_length,
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const uint8_t *data, 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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non_null()
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bool create_forward_chain_packet(const uint8_t *chain_keys, uint16_t chain_length,
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const uint8_t *data, uint16_t data_length,
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uint8_t *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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non_null()
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bool forward_reply(const Networking_Core *net, const IP_Port *forwarder,
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const uint8_t *sendback, uint16_t sendback_length,
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const uint8_t *data, 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 *object, const IP_Port *forwarder, const uint8_t *sendback,
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uint16_t sendback_length, const uint8_t *data,
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uint16_t length, void *userdata);
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non_null(1) nullable(2, 3)
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void set_callback_forwarded_request(Forwarding *forwarding, forwarded_request_cb *function, void *object);
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/** @brief Set callback to handle a forwarded response. */
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typedef void forwarded_response_cb(void *object, const uint8_t *data, uint16_t length, void *userdata);
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non_null(1) nullable(2, 3)
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void set_callback_forwarded_response(Forwarding *forwarding, forwarded_response_cb *function, void *object);
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/** @brief Send forwarding packet to dest with given sendback data and data. */
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non_null(1, 2, 5) nullable(3)
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bool send_forwarding(const Forwarding *forwarding, const IP_Port *dest,
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const uint8_t *sendback_data, uint16_t sendback_data_len,
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const uint8_t *data, uint16_t length);
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typedef bool forward_reply_cb(void *object, const uint8_t *sendback_data, uint16_t sendback_data_len,
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const uint8_t *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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non_null(1) nullable(2, 3)
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void set_callback_forward_reply(Forwarding *forwarding, forward_reply_cb *function, void *object);
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non_null()
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Forwarding *new_forwarding(const Logger *log, const Random *rng, const Mono_Time *mono_time, DHT *dht);
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nullable(1)
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void kill_forwarding(Forwarding *forwarding);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif
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