/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set noet ft=c ts=2 sts=2 sw=2 fenc=utf-8                             :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/internal.h"
#include "libc/calls/struct/fd.internal.h"
#include "libc/calls/struct/iovec.h"
#include "libc/calls/struct/sigset.internal.h"
#include "libc/nt/struct/iovec.h"
#include "libc/nt/winsock.h"
#include "libc/sock/internal.h"
#include "libc/sock/syscall_fd.internal.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
#ifdef __x86_64__

#define _MSG_OOB       1
#define _MSG_DONTROUTE 4
#define _MSG_DONTWAIT  64

struct SendToArgs {
  const struct iovec *iov;
  size_t iovlen;
  void *opt_in_addr;
  uint32_t in_addrsize;
  struct NtIovec iovnt[16];
};

static textwindows int sys_sendto_nt_start(int64_t handle,
                                           struct NtOverlapped *overlap,
                                           uint32_t *flags, void *arg) {
  struct SendToArgs *args = arg;
  return WSASendTo(handle, args->iovnt,
                   __iovec2nt(args->iovnt, args->iov, args->iovlen), 0, *flags,
                   args->opt_in_addr, args->in_addrsize, overlap, 0);
}

textwindows ssize_t sys_sendto_nt(int fd, const struct iovec *iov,
                                  size_t iovlen, uint32_t flags,
                                  void *opt_in_addr, uint32_t in_addrsize) {
  if (flags & ~(_MSG_DONTWAIT | _MSG_OOB | _MSG_DONTROUTE)) return einval();
  ssize_t rc;
  struct Fd *f = g_fds.p + fd;
  sigset_t m = __sig_block();
  bool nonblock = (f->flags & O_NONBLOCK) || (flags & _MSG_DONTWAIT);
  flags &= ~_MSG_DONTWAIT;
  rc = __winsock_block(
      f->handle, flags, nonblock, f->sndtimeo, m, sys_sendto_nt_start,
      &(struct SendToArgs){iov, iovlen, opt_in_addr, in_addrsize});
  __sig_unblock(m);
  return rc;
}

#endif /* __x86_64__ */