170 lines
4.3 KiB
C++
170 lines
4.3 KiB
C++
// Copyright © Transmission authors and contributors.
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// This file is licensed under the MIT (SPDX: MIT) license,
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// A copy of this license can be found in licenses/ .
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#pragma once
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#include <cstddef> // size_t
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#include <optional>
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#include <string>
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#include <string_view>
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#ifdef _WIN32
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#include <inttypes.h>
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#include <ws2tcpip.h>
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#else
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#include <errno.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#endif
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#ifdef _WIN32
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using tr_socket_t = SOCKET;
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#define TR_BAD_SOCKET INVALID_SOCKET
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#undef EADDRINUSE
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#define EADDRINUSE WSAEADDRINUSE
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#undef ECONNREFUSED
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#define ECONNREFUSED WSAECONNREFUSED
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#undef ECONNRESET
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#define ECONNRESET WSAECONNRESET
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#undef EHOSTUNREACH
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#define EHOSTUNREACH WSAEHOSTUNREACH
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#undef EINPROGRESS
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#define EINPROGRESS WSAEINPROGRESS
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#undef ENOTCONN
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#define ENOTCONN WSAENOTCONN
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#undef EWOULDBLOCK
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#define EWOULDBLOCK WSAEWOULDBLOCK
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#undef EAFNOSUPPORT
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#define EAFNOSUPPORT WSAEAFNOSUPPORT
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#undef ENETUNREACH
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#define ENETUNREACH WSAENETUNREACH
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#define sockerrno WSAGetLastError()
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#else
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/** @brief Platform-specific socket descriptor type. */
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using tr_socket_t = int;
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/** @brief Platform-specific invalid socket descriptor constant. */
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#define TR_BAD_SOCKET (-1)
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#define sockerrno errno
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#endif
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/****
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*****
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***** tr_address
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*****
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****/
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enum tr_address_type
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{
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TR_AF_INET,
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TR_AF_INET6,
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NUM_TR_AF_INET_TYPES
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};
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struct tr_address;
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int tr_address_compare(tr_address const* a, tr_address const* b);
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struct tr_address
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{
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static tr_address from_4byte_ipv4(std::string_view in);
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static std::optional<tr_address> from_string(std::string_view str);
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std::string to_string() const;
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std::string to_string(tr_port port) const;
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tr_address_type type;
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union
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{
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struct in6_addr addr6;
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struct in_addr addr4;
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} addr;
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[[nodiscard]] int compare(tr_address const& that) const
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{
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return tr_address_compare(this, &that);
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}
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[[nodiscard]] bool operator==(tr_address const& that) const
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{
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return compare(that) == 0;
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}
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[[nodiscard]] bool operator<(tr_address const& that) const
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{
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return compare(that) < 0;
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}
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[[nodiscard]] bool operator>(tr_address const& that) const
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{
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return compare(that) > 0;
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}
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};
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extern tr_address const tr_inaddr_any;
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extern tr_address const tr_in6addr_any;
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char const* tr_address_to_string(tr_address const* addr);
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char const* tr_address_to_string_with_buf(tr_address const* addr, char* buf, size_t buflen);
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char const* tr_address_and_port_to_string(char* buf, size_t buflen, tr_address const* addr, tr_port port);
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bool tr_address_from_string(tr_address* setme, char const* string);
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bool tr_address_from_string(tr_address* dst, std::string_view src);
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bool tr_address_from_sockaddr_storage(tr_address* setme, tr_port* port, struct sockaddr_storage const* src);
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bool tr_address_is_valid_for_peers(tr_address const* addr, tr_port port);
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constexpr bool tr_address_is_valid(tr_address const* a)
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{
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return a != nullptr && (a->type == TR_AF_INET || a->type == TR_AF_INET6);
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}
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/***********************************************************************
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* Sockets
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**********************************************************************/
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struct tr_session;
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tr_socket_t tr_netBindTCP(tr_address const* addr, tr_port port, bool suppressMsgs);
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tr_socket_t tr_netAccept(tr_session* session, tr_socket_t bound, tr_address* setme_addr, tr_port* setme_port);
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void tr_netSetCongestionControl(tr_socket_t s, char const* algorithm);
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void tr_netClose(tr_session* session, tr_socket_t s);
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void tr_netCloseSocket(tr_socket_t fd);
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bool tr_net_hasIPv6(tr_port);
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/// TOS / DSCP
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// get a string of one of <netinet/ip.h>'s IPTOS_ values, e.g. "cs0"
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std::string tr_netTosToName(int tos);
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// get the number that corresponds to the specified IPTOS_ name, e.g. "cs0" returns 0x00
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std::optional<int> tr_netTosFromName(std::string_view name);
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// set the IPTOS_ value for the specified socket
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void tr_netSetTOS(tr_socket_t sock, int tos, tr_address_type type);
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/**
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* @brief get a human-representable string representing the network error.
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* @param err an errno on Unix/Linux and an WSAError on win32)
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*/
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std::string tr_net_strerror(int err);
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unsigned char const* tr_globalIPv6(tr_session const* session);
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