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/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Copyright (c) Jeremy Harris 1995 - 2020 */
/* Copyright (c) The Exim Maintainers 2021 */
/* 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 */
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