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net/dns/resolvconffile: fix handling of multiple search domains

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Fixes #6875

Change-Id: I57eb9312c9a1c81792ce2b5a0a0f254213b05df2
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2023-01-02 19:55:57 -08:00
committed by Brad Fitzpatrick
parent 692eac23ad
commit ea70aa3d98
2 changed files with 42 additions and 8 deletions
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net/dns/resolvconffile/resolvconffile_test.go
+25
View File
@@ -57,6 +57,31 @@ func TestParse(t *testing.T) {
},
{in: `searchtailsacle.com`, wantErr: true},
{in: `search`, wantErr: true},
// Issue 6875: there can be multiple search domains, and even if they're
// over 253 bytes long total.
{
in: "search search-01.example search-02.example search-03.example search-04.example search-05.example search-06.example search-07.example search-08.example search-09.example search-10.example search-11.example search-12.example search-13.example search-14.example search-15.example\n",
want: &Config{
SearchDomains: []dnsname.FQDN{
"search-01.example.",
"search-02.example.",
"search-03.example.",
"search-04.example.",
"search-05.example.",
"search-06.example.",
"search-07.example.",
"search-08.example.",
"search-09.example.",
"search-10.example.",
"search-11.example.",
"search-12.example.",
"search-13.example.",
"search-14.example.",
"search-15.example.",
},
},
},
}
for _, tt := range tests {