1/************************************************* 2* Exim - an Internet mail transport agent * 3*************************************************/ 4 5/* Copyright (c) Jeremy Harris 1995 - 2020 */ 6/* See the file NOTICE for conditions of use and distribution. */ 7 8/* FreeBSD-specific code. This is concatenated onto the generic 9src/os.c file. */ 10 11 12/************* 13Sendfile shim 14*************/ 15 16ssize_t 17os_sendfile(int out, int in, off_t * offp, size_t cnt) 18{ 19off_t loff = offp ? *offp : 0; 20off_t written; 21 22if (sendfile(in, out, loff, cnt, NULL, &written, 0) < 0) return (ssize_t)-1; 23if (offp) *offp = loff + written; 24return (ssize_t)written; 25} 26 27/************************************************* 28TCP Fast Open: check that the ioctl is accepted 29*************************************************/ 30 31#ifndef COMPILE_UTILITY 32void 33tfo_probe(void) 34{ 35# ifdef TCP_FASTOPEN 36int sock; 37 38if ( (sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0 39 && setsockopt(sock, IPPROTO_TCP, TCP_FASTOPEN, &on, sizeof(on) >= 0) 40 ) 41 f.tcp_fastopen_ok = TRUE; 42close(sock); 43# endif 44} 45#endif 46 47 48/* End of os.c-Linux */ 49