Add Domain Name Matcher

Design difference from original vision: Skipped FQDN step to make it more generalized
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/28651#note_2787394
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Shelikhoo 2022-03-30 16:42:59 +01:00
parent 5578b4dd76
commit 38f0e00e5d
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2 changed files with 81 additions and 0 deletions

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@ -0,0 +1,26 @@
package namematcher
import "strings"
func NewNameMatcher(rule string) NameMatcher {
return NameMatcher{suffix: strings.TrimPrefix(rule, "^"), exact: strings.HasPrefix(rule, "^")}
}
type NameMatcher struct {
exact bool
suffix string
}
func (m *NameMatcher) IsSupersetOf(matcher NameMatcher) bool {
if m.exact {
return matcher.exact && m.suffix == matcher.suffix
}
return strings.HasSuffix(matcher.suffix, m.suffix)
}
func (m *NameMatcher) IsMember(s string) bool {
if m.exact {
return s == m.suffix
}
return strings.HasSuffix(s, m.suffix)
}