1 #ifndef HEADER_CURL_SELECT_H 2 #define HEADER_CURL_SELECT_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2021, 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 ***************************************************************************/ 24 25 #include "curl_setup.h" 26 27 #ifdef HAVE_POLL_H 28 #include <poll.h> 29 #elif defined(HAVE_SYS_POLL_H) 30 #include <sys/poll.h> 31 #endif 32 33 /* 34 * Definition of pollfd struct and constants for platforms lacking them. 35 */ 36 37 #if !defined(HAVE_STRUCT_POLLFD) && \ 38 !defined(HAVE_SYS_POLL_H) && \ 39 !defined(HAVE_POLL_H) && \ 40 !defined(POLLIN) 41 42 #define POLLIN 0x01 43 #define POLLPRI 0x02 44 #define POLLOUT 0x04 45 #define POLLERR 0x08 46 #define POLLHUP 0x10 47 #define POLLNVAL 0x20 48 49 struct pollfd 50 { 51 curl_socket_t fd; 52 short events; 53 short revents; 54 }; 55 56 #endif 57 58 #ifndef POLLRDNORM 59 #define POLLRDNORM POLLIN 60 #endif 61 62 #ifndef POLLWRNORM 63 #define POLLWRNORM POLLOUT 64 #endif 65 66 #ifndef POLLRDBAND 67 #define POLLRDBAND POLLPRI 68 #endif 69 70 /* there are three CSELECT defines that are defined in the public header that 71 are exposed to users, but this *IN2 bit is only ever used internally and 72 therefore defined here */ 73 #define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1) 74 75 int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2, 76 curl_socket_t writefd, 77 timediff_t timeout_ms); 78 #define SOCKET_READABLE(x,z) \ 79 Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z) 80 #define SOCKET_WRITABLE(x,z) \ 81 Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z) 82 83 int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms); 84 int Curl_wait_ms(timediff_t timeout_ms); 85 86 #ifdef TPF 87 int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes, 88 fd_set* excepts, struct timeval *tv); 89 #endif 90 91 /* TPF sockets are not in range [0..FD_SETSIZE-1], which 92 unfortunately makes it impossible for us to easily check if they're valid 93 94 With Winsock the valid range is [0..INVALID_SOCKET-1] according to 95 https://docs.microsoft.com/en-us/windows/win32/winsock/socket-data-type-2 96 */ 97 #if defined(TPF) 98 #define VALID_SOCK(x) 1 99 #define VERIFY_SOCK(x) Curl_nop_stmt 100 #define FDSET_SOCK(x) 1 101 #elif defined(USE_WINSOCK) 102 #define VALID_SOCK(s) ((s) < INVALID_SOCKET) 103 #define FDSET_SOCK(x) 1 104 #define VERIFY_SOCK(x) do { \ 105 if(!VALID_SOCK(x)) { \ 106 SET_SOCKERRNO(WSAEINVAL); \ 107 return -1; \ 108 } \ 109 } while(0) 110 #else 111 #define VALID_SOCK(s) ((s) >= 0) 112 113 /* If the socket is small enough to get set or read from an fdset */ 114 #define FDSET_SOCK(s) ((s) < FD_SETSIZE) 115 116 #define VERIFY_SOCK(x) do { \ 117 if(!VALID_SOCK(x) || !FDSET_SOCK(x)) { \ 118 SET_SOCKERRNO(EINVAL); \ 119 return -1; \ 120 } \ 121 } while(0) 122 #endif 123 124 #endif /* HEADER_CURL_SELECT_H */ 125