1#ifndef HEADER_CURL_SELECT_H 2#define HEADER_CURL_SELECT_H 3/*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 11 * 12 * This software is licensed as described in the file COPYING, which 13 * you should have received as part of this distribution. The terms 14 * are also available at https://curl.se/docs/copyright.html. 15 * 16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 17 * copies of the Software, and permit persons to whom the Software is 18 * furnished to do so, under the terms of the COPYING file. 19 * 20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 21 * KIND, either express or implied. 22 * 23 * SPDX-License-Identifier: curl 24 * 25 ***************************************************************************/ 26 27#include "curl_setup.h" 28 29#ifdef HAVE_POLL_H 30#include <poll.h> 31#elif defined(HAVE_SYS_POLL_H) 32#include <sys/poll.h> 33#endif 34 35/* 36 * Definition of pollfd struct and constants for platforms lacking them. 37 */ 38 39#if !defined(HAVE_SYS_POLL_H) && \ 40 !defined(HAVE_POLL_H) && \ 41 !defined(POLLIN) 42 43#define POLLIN 0x01 44#define POLLPRI 0x02 45#define POLLOUT 0x04 46#define POLLERR 0x08 47#define POLLHUP 0x10 48#define POLLNVAL 0x20 49 50struct pollfd 51{ 52 curl_socket_t fd; 53 short events; 54 short revents; 55}; 56 57#endif 58 59#ifndef POLLRDNORM 60#define POLLRDNORM POLLIN 61#endif 62 63#ifndef POLLWRNORM 64#define POLLWRNORM POLLOUT 65#endif 66 67#ifndef POLLRDBAND 68#define POLLRDBAND POLLPRI 69#endif 70 71/* there are three CSELECT defines that are defined in the public header that 72 are exposed to users, but this *IN2 bit is only ever used internally and 73 therefore defined here */ 74#define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1) 75 76int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2, 77 curl_socket_t writefd, 78 timediff_t timeout_ms); 79#define SOCKET_READABLE(x,z) \ 80 Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z) 81#define SOCKET_WRITABLE(x,z) \ 82 Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z) 83 84int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms); 85int Curl_wait_ms(timediff_t timeout_ms); 86 87/* 88 With Winsock the valid range is [0..INVALID_SOCKET-1] according to 89 https://docs.microsoft.com/en-us/windows/win32/winsock/socket-data-type-2 90*/ 91#ifdef USE_WINSOCK 92#define VALID_SOCK(s) ((s) < INVALID_SOCKET) 93#define FDSET_SOCK(x) 1 94#define VERIFY_SOCK(x) do { \ 95 if(!VALID_SOCK(x)) { \ 96 SET_SOCKERRNO(WSAEINVAL); \ 97 return -1; \ 98 } \ 99} while(0) 100#else 101#define VALID_SOCK(s) ((s) >= 0) 102 103/* If the socket is small enough to get set or read from an fdset */ 104#define FDSET_SOCK(s) ((s) < FD_SETSIZE) 105 106#define VERIFY_SOCK(x) do { \ 107 if(!VALID_SOCK(x) || !FDSET_SOCK(x)) { \ 108 SET_SOCKERRNO(EINVAL); \ 109 return -1; \ 110 } \ 111 } while(0) 112#endif 113 114#endif /* HEADER_CURL_SELECT_H */ 115