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/* Copyright (c) 2003-2004, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file socket.h
* \brief Header for socket.c
**/
#ifndef TOR_SOCKET_H
#define TOR_SOCKET_H
#include "orconfig.h"
#include "lib/cc/torint.h"
#include "lib/net/nettypes.h"
#include "lib/testsupport/testsupport.h"
#include <errno.h>
struct sockaddr;
int tor_close_socket_simple(tor_socket_t s);
MOCK_DECL(int, tor_close_socket, (tor_socket_t s));
void tor_take_socket_ownership(tor_socket_t s);
void tor_release_socket_ownership(tor_socket_t s);
tor_socket_t tor_open_socket_with_extensions(
int domain, int type, int protocol,
int cloexec, int nonblock);
MOCK_DECL(tor_socket_t,tor_open_socket,(int domain, int type, int protocol));
tor_socket_t tor_open_socket_nonblocking(int domain, int type, int protocol);
tor_socket_t tor_accept_socket(tor_socket_t sockfd, struct sockaddr *addr,
socklen_t *len);
tor_socket_t tor_accept_socket_nonblocking(tor_socket_t sockfd,
struct sockaddr *addr,
socklen_t *len);
tor_socket_t tor_accept_socket_with_extensions(tor_socket_t sockfd,
struct sockaddr *addr,
socklen_t *len,
int cloexec, int nonblock);
MOCK_DECL(tor_socket_t, tor_connect_socket,(tor_socket_t socket,
const struct sockaddr *address,
socklen_t address_len));
int get_n_open_sockets(void);
MOCK_DECL(int,tor_getsockname,(tor_socket_t socket, struct sockaddr *address,
socklen_t *address_len));
struct tor_addr_t;
int tor_addr_from_getsockname(struct tor_addr_t *addr_out, tor_socket_t sock);
#define tor_socket_send(s, buf, len, flags) send(s, buf, len, flags)
#define tor_socket_recv(s, buf, len, flags) recv(s, buf, len, flags)
int set_socket_nonblocking(tor_socket_t socket);
int tor_socketpair(int family, int type, int protocol, tor_socket_t fd[2]);
int network_init(void);
void check_network_configuration(bool server_mode);
int get_max_sockets(void);
void set_max_sockets(int);
ssize_t write_all_to_socket(tor_socket_t fd, const char *buf, size_t count);
ssize_t read_all_from_socket(tor_socket_t fd, char *buf, size_t count);
/* For stupid historical reasons, windows sockets have an independent
* set of errnos, and an independent way to get them. Also, you can't
* always believe WSAEWOULDBLOCK. Use the macros below to compare
* errnos against expected values, and use tor_socket_errno to find
* the actual errno after a socket operation fails.
*/
#if defined(_WIN32)
/** Expands to WSA<b>e</b> on Windows, and to <b>e</b> elsewhere. */
#define SOCK_ERRNO(e) WSA##e
/** Return true if e is EAGAIN or the local equivalent. */
#define ERRNO_IS_EAGAIN(e) ((e) == EAGAIN || (e) == WSAEWOULDBLOCK)
/** Return true if e is EINPROGRESS or the local equivalent. */
#define ERRNO_IS_EINPROGRESS(e) ((e) == WSAEINPROGRESS)
/** Return true if e is EINPROGRESS or the local equivalent as returned by
* a call to connect(). */
#define ERRNO_IS_CONN_EINPROGRESS(e) \
((e) == WSAEINPROGRESS || (e)== WSAEINVAL || (e) == WSAEWOULDBLOCK)
/** Return true if e is EAGAIN or another error indicating that a call to
* accept() has no pending connections to return. */
#define ERRNO_IS_ACCEPT_EAGAIN(e) ERRNO_IS_EAGAIN(e)
/** Return true if e is EMFILE or another error indicating that a call to
* accept() has failed because we're out of fds or something. */
#define ERRNO_IS_RESOURCE_LIMIT(e) \
((e) == WSAEMFILE || (e) == WSAENOBUFS)
/** Return true if e is EADDRINUSE or the local equivalent. */
#define ERRNO_IS_EADDRINUSE(e) ((e) == WSAEADDRINUSE)
/** Return true if e is EINTR or the local equivalent */
#define ERRNO_IS_EINTR(e) ((e) == WSAEINTR || 0)
int tor_socket_errno(tor_socket_t sock);
const char *tor_socket_strerror(int e);
#else /* !defined(_WIN32) */
#define SOCK_ERRNO(e) e
#if EAGAIN == EWOULDBLOCK
/* || 0 is for -Wparentheses-equality (-Wall?) appeasement under clang */
#define ERRNO_IS_EAGAIN(e) ((e) == EAGAIN || 0)
#else
#define ERRNO_IS_EAGAIN(e) ((e) == EAGAIN || (e) == EWOULDBLOCK)
#endif /* EAGAIN == EWOULDBLOCK */
#define ERRNO_IS_EINTR(e) ((e) == EINTR || 0)
#define ERRNO_IS_EINPROGRESS(e) ((e) == EINPROGRESS || 0)
#define ERRNO_IS_CONN_EINPROGRESS(e) ((e) == EINPROGRESS || 0)
#define ERRNO_IS_ACCEPT_EAGAIN(e) \
(ERRNO_IS_EAGAIN(e) || (e) == ECONNABORTED)
#define ERRNO_IS_RESOURCE_LIMIT(e) \
((e) == EMFILE || (e) == ENFILE || (e) == ENOBUFS || (e) == ENOMEM)
#define ERRNO_IS_EADDRINUSE(e) (((e) == EADDRINUSE) || 0)
#define tor_socket_errno(sock) (errno)
#define tor_socket_strerror(e) strerror(e)
#endif /* defined(_WIN32) */
#if defined(_WIN32) && !defined(SIO_IDEAL_SEND_BACKLOG_QUERY)
#define SIO_IDEAL_SEND_BACKLOG_QUERY 0x4004747b
#endif
#endif /* !defined(TOR_SOCKET_H) */
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