9b36dd9d99
9ed2fa80d fix(toxav): remove extra copy of video frame on encode de30cf3ad docs: Add new file kinds, that should be useful to all clients. d5b5e879d fix(DHT): Correct node skipping logic timed out nodes. 30e71fe97 refactor: Generate event dispatch functions and add tox_events_dispatch. 8fdbb0b50 style: Format parameter lists in event handlers. d00dee12b refactor: Add warning logs when losing chat invites. b144e8db1 feat: Add a way to look up a file number by ID. 849281ea0 feat: Add a way to fetch groups by chat ID. a2c177396 refactor: Harden event system and improve type safety. 8f5caa656 refactor: Add MessagePack string support to bin_pack. 34e8d5ad5 chore: Add GitHub CodeQL workflow and local Docker runner. f7b068010 refactor: Add nullability annotations to event headers. 788abe651 refactor(toxav): Use system allocator for mutexes. 2e4b423eb refactor: Use specific typedefs for public API arrays. 2baf34775 docs(toxav): update idle iteration interval see 679444751876fa3882a717772918ebdc8f083354 2f87ac67b feat: Add Event Loop abstraction (Ev). f8dfc38d8 test: Fix data race in ToxScenario virtual_clock. 38313921e test(TCP): Add regression test for TCP priority queue integrity. f94a50d9a refactor(toxav): Replace mutable_mutex with dynamically allocated mutex. ad054511e refactor: Internalize DHT structs and add debug helpers. 8b467cc96 fix: Prevent potential integer overflow in group chat handshake. 4962bdbb8 test: Improve TCP simulation and add tests 5f0227093 refactor: Allow nullable data in group chat handlers. e97b18ea9 chore: Improve Windows Docker support. b14943bbd refactor: Move Logger out of Messenger into Tox. dd3136250 cleanup: Apply nullability qualifiers to C++ codebase. 1849f70fc refactor: Extract low-level networking code to net and os_network. 8fec75421 refactor: Delete tox_random, align on rng and os_random. a03ae8051 refactor: Delete tox_memory, align on mem and os_memory. 4c88fed2c refactor: Use `std::` prefixes more consistently in C++ code. 72452f2ae test: Add some more tests for onion and shared key cache. d5a51b09a cleanup: Use tox_attributes.h in tox_private.h and install it. b6f5b9fc5 test: Add some benchmarks for various high level things. 8a8d02785 test(support): Introduce threaded Tox runner and simulation barrier d68d1d095 perf(toxav): optimize audio and video intermediate buffers by keeping them around REVERT: c9cdae001 fix(toxav): remove extra copy of video frame on encode git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: 9ed2fa80d582c714d6bdde6a7648220a92cddff8
126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2016-2025 The TokTok team.
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* Copyright © 2014 Tox project.
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*/
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#ifndef C_TOXCORE_TOXCORE_TCP_COMMON_H
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#define C_TOXCORE_TOXCORE_TCP_COMMON_H
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#include <stdbool.h>
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#include <stdint.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 "net.h"
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#include "net_profile.h"
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#include "network.h"
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#include "rng.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct TCP_Priority_List TCP_Priority_List;
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struct TCP_Priority_List {
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TCP_Priority_List *_Nullable next;
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uint16_t size;
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uint16_t sent;
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uint8_t *_Nonnull data;
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};
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void wipe_priority_list(const Memory *_Nonnull mem, TCP_Priority_List *_Nullable p);
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#define NUM_RESERVED_PORTS 16
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#define NUM_CLIENT_CONNECTIONS (256 - NUM_RESERVED_PORTS)
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typedef enum Tcp_Packet {
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TCP_PACKET_ROUTING_REQUEST = 0,
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TCP_PACKET_ROUTING_RESPONSE = 1,
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TCP_PACKET_CONNECTION_NOTIFICATION = 2,
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TCP_PACKET_DISCONNECT_NOTIFICATION = 3,
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TCP_PACKET_PING = 4,
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TCP_PACKET_PONG = 5,
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TCP_PACKET_OOB_SEND = 6,
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TCP_PACKET_OOB_RECV = 7,
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TCP_PACKET_ONION_REQUEST = 8,
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TCP_PACKET_ONION_RESPONSE = 9,
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TCP_PACKET_FORWARD_REQUEST = 10,
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TCP_PACKET_FORWARDING = 11,
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} Tcp_Packet;
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const char *_Nonnull tcp_packet_type_to_string(Tcp_Packet type);
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bool tcp_packet_from_int(uint32_t value, Tcp_Packet *_Nonnull out_enum);
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#define TCP_HANDSHAKE_PLAIN_SIZE (CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE)
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#define TCP_SERVER_HANDSHAKE_SIZE (CRYPTO_NONCE_SIZE + TCP_HANDSHAKE_PLAIN_SIZE + CRYPTO_MAC_SIZE)
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#define TCP_CLIENT_HANDSHAKE_SIZE (CRYPTO_PUBLIC_KEY_SIZE + TCP_SERVER_HANDSHAKE_SIZE)
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#define TCP_MAX_OOB_DATA_LENGTH 1024
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/** frequency to ping connected nodes and timeout in seconds */
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#define TCP_PING_FREQUENCY 30
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#define TCP_PING_TIMEOUT 10
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#define MAX_PACKET_SIZE 2048
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typedef struct TCP_Connection {
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const Memory *_Nonnull mem;
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const Random *_Nonnull rng;
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const Network *_Nonnull ns;
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Socket sock;
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IP_Port ip_port; // for debugging.
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uint8_t sent_nonce[CRYPTO_NONCE_SIZE]; /* Nonce of sent packets. */
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uint8_t shared_key[CRYPTO_SHARED_KEY_SIZE];
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uint8_t last_packet[2 + MAX_PACKET_SIZE];
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uint16_t last_packet_length;
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uint16_t last_packet_sent;
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TCP_Priority_List *_Nullable priority_queue_start;
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TCP_Priority_List *_Nullable priority_queue_end;
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// This is a shared pointer to the parent's respective Net_Profile object
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// (either TCP_Server for TCP server packets or TCP_Connections for TCP client packets).
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Net_Profile *_Nullable net_profile;
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} TCP_Connection;
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/**
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* @retval 0 if pending data was sent completely
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* @retval -1 if it wasn't
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*/
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int send_pending_data_nonpriority(const Logger *_Nonnull logger, TCP_Connection *_Nonnull con);
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/**
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* @retval 0 if pending data was sent completely
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* @retval -1 if it wasn't
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*/
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int send_pending_data(const Logger *_Nonnull logger, TCP_Connection *_Nonnull con);
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/**
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* @retval 1 on success.
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* @retval 0 if could not send packet.
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* @retval -1 on failure (connection must be killed).
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*/
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int write_packet_tcp_secure_connection(const Logger *_Nonnull logger, TCP_Connection *_Nonnull con, const uint8_t *_Nonnull data, uint16_t length, bool priority);
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/** @brief Read length bytes from socket.
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*
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* return length on success
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* return -1 on failure/no data in buffer.
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*/
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int read_tcp_packet(const Logger *_Nonnull logger, const Memory *_Nonnull mem, const Network *_Nonnull ns, Socket sock, uint8_t *_Nonnull data, uint16_t length,
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const IP_Port *_Nonnull ip_port);
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/**
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* @return length of received packet on success.
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* @retval 0 if could not read any packet.
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* @retval -1 on failure (connection must be killed).
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*/
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int read_packet_tcp_secure_connection(const Logger *_Nonnull logger, const Memory *_Nonnull mem, const Network *_Nonnull ns, Socket sock, uint16_t *_Nonnull next_packet_length,
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const uint8_t *_Nonnull shared_key, uint8_t *_Nonnull recv_nonce, uint8_t *_Nonnull data, uint16_t max_len, const IP_Port *_Nonnull ip_port);
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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_TCP_COMMON_H */
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