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
49struct 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
75int 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
83int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms);
84int Curl_wait_ms(timediff_t timeout_ms);
85
86#ifdef TPF
87int 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