mirror of
https://github.com/jart/cosmopolitan.git
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50 lines
2.9 KiB
C
50 lines
2.9 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/struct/iovec.h"
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#include "libc/nt/struct/overlapped.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/syscall_fd.internal.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Performs datagram receive on New Technology.
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*
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* @param fd must be a socket
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* @return number of bytes received, or -1 w/ errno
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*/
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textwindows ssize_t sys_recvfrom_nt(struct Fd *fd, const struct iovec *iov,
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size_t iovlen, uint32_t flags,
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void *opt_out_srcaddr,
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uint32_t *opt_inout_srcaddrsize) {
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ssize_t rc;
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uint32_t got = 0;
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struct NtIovec iovnt[16];
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struct NtOverlapped overlapped = {.hEvent = WSACreateEvent()};
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if (_check_interrupts(true, g_fds.p)) return eintr();
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if (!WSARecvFrom(fd->handle, iovnt, __iovec2nt(iovnt, iov, iovlen), &got,
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&flags, opt_out_srcaddr, opt_inout_srcaddrsize, &overlapped,
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NULL)) {
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rc = got;
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} else {
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rc = __wsablock(fd->handle, &overlapped, &flags, true);
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}
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WSACloseEvent(overlapped.hEvent);
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return rc;
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}
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