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https://github.com/jart/cosmopolitan.git
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1d4eb08fa1
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
70 lines
3.4 KiB
C
70 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/state.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/iphlpapi.h"
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#include "libc/nt/winsock.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/yoink.inc"
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#include "libc/sysv/consts/ipproto.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/so.h"
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#include "libc/sysv/consts/sock.h"
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#include "libc/sysv/consts/sol.h"
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/*
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* ioctl(SIOCGIFCONFIG) for Windows need to access the following
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* functions through weak reference. This ensure those symbols are not
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* stripped during final link.
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*/
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STATIC_YOINK("GetAdaptersAddresses");
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STATIC_YOINK("tprecode16to8");
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STATIC_YOINK("_dupsockfd");
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textwindows int sys_socket_nt(int family, int type, int protocol) {
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int64_t h;
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struct SockFd *sockfd;
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int fd, oflags, truetype;
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fd = __reservefd(-1);
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if (fd == -1) return -1;
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truetype = type & ~(SOCK_CLOEXEC | SOCK_NONBLOCK);
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if ((h = WSASocket(family, truetype, protocol, NULL, 0,
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kNtWsaFlagOverlapped)) != -1) {
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oflags = 0;
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if (type & SOCK_CLOEXEC) oflags |= O_CLOEXEC;
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if (type & SOCK_NONBLOCK) oflags |= O_NONBLOCK;
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sockfd = calloc(1, sizeof(struct SockFd));
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sockfd->family = family;
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sockfd->type = truetype;
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sockfd->protocol = protocol;
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__fds_lock();
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g_fds.p[fd].kind = kFdSocket;
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g_fds.p[fd].flags = oflags;
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g_fds.p[fd].mode = 0140666;
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g_fds.p[fd].handle = h;
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g_fds.p[fd].extra = (uintptr_t)sockfd;
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__fds_unlock();
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return fd;
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} else {
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__releasefd(fd);
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return __winsockerr();
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}
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}
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