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net/dns/resolver: add envknob to debug exit node DNS queries on on Windows

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Add the envknob TS_DEBUG_EXIT_NODE_DNS_NET_PKG, which enables more
verbose debug logging when calling the handleExitNodeDNSQueryWithNetPkg
function. This function is currently only called on Windows and Android.

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ieb3ca7b98837d7dc69cd9ca47609c1c52e3afd7b
This commit is contained in:
Andrew Dunham
2023-02-03 11:25:31 -05:00
parent d2301db49c
commit 880a41bfcc
2 changed files with 35 additions and 5 deletions
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net/dns/resolver/tsdns_test.go
+4 -3
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@@ -10,6 +10,7 @@ import (
"encoding/json"
"errors"
"fmt"
"log"
"math/rand"
"net"
"net/netip"
@@ -1122,7 +1123,7 @@ func TestHandleExitNodeDNSQueryWithNetPkg(t *testing.T) {
}
t.Run("no_such_host", func(t *testing.T) {
res, err := handleExitNodeDNSQueryWithNetPkg(context.Background(), backResolver, &response{
res, err := handleExitNodeDNSQueryWithNetPkg(context.Background(), t.Logf, backResolver, &response{
Header: dnsmessage.Header{
ID: 123,
Response: true,
@@ -1233,7 +1234,7 @@ func TestHandleExitNodeDNSQueryWithNetPkg(t *testing.T) {
for _, tt := range tests {
t.Run(fmt.Sprintf("%v_%v", tt.Type, strings.Trim(tt.Name, ".")), func(t *testing.T) {
got, err := handleExitNodeDNSQueryWithNetPkg(context.Background(), backResolver, &response{
got, err := handleExitNodeDNSQueryWithNetPkg(context.Background(), t.Logf, backResolver, &response{
Header: dnsmessage.Header{
ID: 123,
Response: true,
@@ -1395,7 +1396,7 @@ func (a *wrapResolverConn) WriteTo(q []byte, _ net.Addr) (n int, err error) {
if resp == nil {
return 0, errors.New("bad query")
}
res, err := handleExitNodeDNSQueryWithNetPkg(context.Background(), a.r, resp)
res, err := handleExitNodeDNSQueryWithNetPkg(context.Background(), log.Printf, a.r, resp)
if err != nil {
return 0, err
}