40 lines
903 B
Go
40 lines
903 B
Go
package birdfmt
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import (
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"net/netip"
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"sort"
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"strings"
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)
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// RenderStaticIPv4Protocol renders a BIRD 2 `protocol static` block for IPv4 prefixes.
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// Prefixes are sorted for stable output (golden tests, reproducible rev).
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func RenderStaticIPv4Protocol(protocolName string, prefixes []netip.Prefix) string {
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if protocolName == "" {
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protocolName = "evobgp_static_v4"
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}
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uniq := make(map[string]netip.Prefix)
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for _, p := range prefixes {
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if !p.Addr().Is4() {
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continue
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}
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uniq[p.String()] = p.Masked()
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}
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keys := make([]string, 0, len(uniq))
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for k := range uniq {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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var b strings.Builder
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b.WriteString("protocol static ")
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b.WriteString(protocolName)
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b.WriteString(" {\n ipv4;\n")
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for _, k := range keys {
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b.WriteString(" route ")
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b.WriteString(k)
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b.WriteString(" unreachable;\n")
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}
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b.WriteString("}\n")
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return b.String()
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}
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