/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) Jeremy Harris 1995 - 2020 */
/* Copyright (c) The Exim Maintainers 2021 */
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* See the file NOTICE for conditions of use and distribution. */

/* FreeBSD-specific code. This is concatenated onto the generic
src/os.c file. */


/*************
Sendfile shim
*************/

ssize_t
os_sendfile(int out, int in, off_t * offp, size_t cnt)
{
off_t loff = offp ? *offp : 0;
off_t written;

if (sendfile(in, out, loff, cnt, NULL, &written, 0) < 0) return (ssize_t)-1;
if (offp) *offp = loff + written;
return (ssize_t)written;
}

/*************************************************
TCP Fast Open:  check that the ioctl is accepted
*************************************************/

#ifndef COMPILE_UTILITY
void
tfo_probe(void)
{
# ifdef TCP_FASTOPEN
int sock;

if (  (sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0
   && setsockopt(sock, IPPROTO_TCP, TCP_FASTOPEN, &on, sizeof(on) >= 0)
   )
  f.tcp_fastopen_ok = TRUE;
close(sock);
# endif
}
#endif


/* End of os.c-Linux */
