TCP_FASTOPEN_FILE
if ( (tcp_fastopen_fp = open(TCP_FASTOPEN_FILE, O_RDONLY)) == -1 ) {
log_msg(LOG_INFO,"Error opening " TCP_FASTOPEN_FILE ": %s\n", strerror(errno));
log_msg(LOG_INFO,"Error reading " TCP_FASTOPEN_FILE ": %s\n", strerror(errno));