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use std::collections::{BTreeMap, HashSet};
use std::fmt;
use std::marker::PhantomData;
use crate::resolver::lookup::LookupResult;
use crate::resolver::{Error, Lookups};
use crate::RecordType;
use super::*;
#[derive(Debug)]
pub struct LookupsStats<'a> {
pub responses: usize,
pub nxdomains: usize,
pub timeout_errors: usize,
pub refuse_errors: usize,
pub servfail_errors: usize,
pub total_errors: usize,
pub rr_type_counts: BTreeMap<RecordType, usize>,
pub responding_servers: usize,
pub response_time_summary: Summary<u128>,
phantom: PhantomData<&'a usize>,
}
impl<'a> fmt::Display for LookupsStats<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fn fmt_errors(errors: usize, timeouts: usize, refuses: usize, servfails: usize) -> String {
if errors == 0 {
return "0 Err".to_string();
}
let others = errors - timeouts - refuses - servfails;
format!(
"{num_err} Err [{num_to} TO, {num_qr} QR, {num_sf} SF, {num_others} O]",
num_err = if errors > 0 {
styles::ERR.paint(errors)
} else {
styles::NORMAL.paint(errors)
},
num_to = if timeouts > 0 {
styles::ERR.paint(timeouts)
} else {
styles::NORMAL.paint(timeouts)
},
num_qr = if refuses > 0 {
styles::ERR.paint(refuses)
} else {
styles::NORMAL.paint(refuses)
},
num_sf = if servfails > 0 {
styles::ERR.paint(servfails)
} else {
styles::NORMAL.paint(servfails)
},
num_others = if others > 0 {
styles::ERR.paint(others)
} else {
styles::NORMAL.paint(others)
},
)
}
let rr_types = rr_types_as_str(&self.rr_type_counts);
let num_rr = count_rrs(&self.rr_type_counts);
let str = format!("{num_resp} responses with {num_rr} RR [{rr_types}], {num_nx} Nx, {errs} in (min {min_time}, max {max_time}) ms from {num_srvs} server{servers}",
num_resp = styles::BOLD.paint(self.responses),
num_rr = styles::GOOD.paint(num_rr),
rr_types = rr_types,
num_nx = styles::WARN.paint(self.nxdomains),
errs = fmt_errors(self.total_errors, self.timeout_errors, self.refuse_errors, self.servfail_errors),
min_time = self.response_time_summary.min.map(|x| x.to_string()).unwrap_or_else(|| "-".to_string()),
max_time = self.response_time_summary.max.map(|x| x.to_string()).unwrap_or_else(|| "-".to_string()),
num_srvs = styles::BOLD.paint(self.responding_servers),
servers = if self.responding_servers == 1 { "" } else { "s" },
);
f.write_str(&str)
}
}
#[derive(Debug)]
struct Counts {
responses: usize,
nxdomains: usize,
timeout_errors: usize,
refuse_errors: usize,
servfail_errors: usize,
total_errors: usize,
}
impl<'a> Statistics<'a> for Lookups {
type StatsOut = LookupsStats<'a>;
fn statistics(&'a self) -> Self::StatsOut {
let counts = count_result_types(&self);
let rr_type_counts = count_rr_types(&self);
let responding_servers = count_responding_servers(&self);
let response_times: Vec<_> = self
.iter()
.map(|x| x.result().response())
.flatten()
.map(|x| x.response_time().as_millis())
.collect();
let response_time_summary = Summary::summary(response_times.as_slice());
LookupsStats {
responses: counts.responses,
nxdomains: counts.nxdomains,
timeout_errors: counts.timeout_errors,
refuse_errors: counts.refuse_errors,
servfail_errors: counts.servfail_errors,
total_errors: counts.total_errors,
rr_type_counts,
responding_servers,
response_time_summary,
phantom: PhantomData,
}
}
}
fn count_rr_types(lookups: &Lookups) -> BTreeMap<RecordType, usize> {
let mut type_counts = BTreeMap::new();
for l in lookups.iter() {
if let Some(response) = l.result().response() {
for r in response.records() {
let type_count = type_counts.entry(r.record_type()).or_insert(0);
*type_count += 1;
}
}
}
type_counts
}
fn count_result_types(lookups: &Lookups) -> Counts {
let mut responses: usize = 0;
let mut nxdomains: usize = 0;
let mut timeout_errors: usize = 0;
let mut refuse_errors: usize = 0;
let mut servfail_errors: usize = 0;
let mut total_errors: usize = 0;
for l in lookups.iter() {
match l.result() {
LookupResult::Response { .. } => responses += 1,
LookupResult::NxDomain { .. } => nxdomains += 1,
LookupResult::Error(Error::Timeout) => {
timeout_errors += 1;
total_errors += 1
}
LookupResult::Error(Error::QueryRefused) => {
refuse_errors += 1;
total_errors += 1
}
LookupResult::Error(Error::ServerFailure) => {
servfail_errors += 1;
total_errors += 1
}
LookupResult::Error { .. } => total_errors += 1,
}
}
Counts {
responses,
nxdomains,
timeout_errors,
refuse_errors,
servfail_errors,
total_errors,
}
}
fn count_responding_servers(lookups: &Lookups) -> usize {
let server_set: HashSet<_> = lookups
.iter()
.filter(|x| x.result().is_response())
.map(|x| x.name_server().to_string())
.collect();
server_set.len()
}
fn rr_types_as_str(rr_type_counts: &BTreeMap<RecordType, usize>) -> String {
rr_type_counts
.iter()
.map(|x| format!("{} {}", x.1, x.0))
.collect::<Vec<_>>()
.as_slice()
.join(", ")
}
fn count_rrs(rr_type_counts: &BTreeMap<RecordType, usize>) -> usize {
rr_type_counts.values().sum()
}