Donavan Fritz
71e584cf96
NodeConfig.Spec.Defaults adds per-node IPv6/IPv4 family defaults that pod annotations can override; built-in baseline (v6=true, v4=false) still applies when the field is omitted. bird.Render now validates every operator-supplied value (peer addresses, CIDRs, anycast IPs, source addresses) before templating — fuzz found a peer address containing `}` produced unbalanced braces in bird.conf. Failing input preserved as a regression seed. Fuzz targets added for ParseAnnotations, ParseCNIArgs, HostIfaceName, canonical, IPAM allocate sequences, embed.Embed, and bird.Render. Hardened canonical/ipToU32 against nil and non-IPv4 inputs. README rewritten for outside readers — quickstart, NodeConfig + annotation reference with worked examples, anycast use cases, comparison vs Calico and Cilium, requirements, limitations. Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
package embed
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import (
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"net"
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"testing"
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)
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// FuzzEmbed verifies that Embed never panics and that any successful return
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// keeps the output address inside the requested network.
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func FuzzEmbed(f *testing.F) {
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type seed struct {
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prefix string
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fields string // comma-separated, mapped below to []Field
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ns, pod string
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image string
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fallback string
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nNibble byte
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}
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for _, s := range []seed{
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{"2602:817:3000:f001::/64", "namespace,pod,image", "mail", "stalwart-0", "", "ctr", 0xe},
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{"2001:db8::/64", "namespace", "ns", "p", "", "", 0},
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{"2001:db8::/96", "pod", "", "podname", "", "ctr", 0xf},
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{"2001:db8::/48", "namespace,pod", "ns", "p", "", "ctr", 0x1},
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{"2001:db8::/120", "namespace", "n", "p", "", "ctr", 0x0}, // 8 host nibbles
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{"2001:db8::/124", "namespace", "n", "p", "", "ctr", 0x0}, // 4 host nibbles
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{"2001:db8::/127", "namespace", "n", "p", "", "ctr", 0x0}, // not nibble-aligned
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{"2001:db8::/63", "namespace", "n", "p", "", "ctr", 0x0}, // not nibble-aligned
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{"2001:db8::/64", "namespace,pod,image", "", "", "sha256:abcdef0123456789aabbccddeeff00112233445566778899aabbccddeeff0011", "", 0xa},
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{"2001:db8::/64", "namespace,pod,image", "", "", "", "ctr", 0xa},
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{"2001:db8::/64", "namespace", "🦆", "🐧", "", "", 0},
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{"2001:db8::/64", "namespace", "ns\x00\x00", "p", "", "", 0},
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} {
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f.Add(s.prefix, s.fields, s.ns, s.pod, s.image, s.fallback, s.nNibble)
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}
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f.Fuzz(func(t *testing.T, prefix, fieldsStr, ns, pod, image, fallback string, nNibble byte) {
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_, network, err := net.ParseCIDR(prefix)
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if err != nil {
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return
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}
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fields, ok := decodeFields(fieldsStr)
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if !ok {
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return
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}
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got, err := Embed(network, fields, Values{
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Namespace: ns,
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Pod: pod,
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Image: image,
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ImageFallback: fallback,
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}, nNibble)
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if err != nil {
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return
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}
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if !network.Contains(got) {
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t.Fatalf("Embed(%s, %v) = %s, outside network", prefix, fields, got)
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}
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// Property: low nibble of last byte equals nNibble & 0x0F.
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if want := nNibble & 0x0F; got[len(got)-1]&0x0F != want {
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t.Fatalf("low nibble = %x, want %x", got[len(got)-1]&0x0F, want)
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}
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})
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}
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func decodeFields(s string) ([]Field, bool) {
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if s == "" {
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return nil, false
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}
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var out []Field
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cur := []byte{}
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flush := func() bool {
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if len(cur) == 0 {
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return true
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}
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switch string(cur) {
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case string(FieldNamespace):
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out = append(out, FieldNamespace)
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case string(FieldPod):
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out = append(out, FieldPod)
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case string(FieldImage):
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out = append(out, FieldImage)
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default:
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return false
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}
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cur = cur[:0]
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return true
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}
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for i := 0; i < len(s); i++ {
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if s[i] == ',' {
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if !flush() {
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return nil, false
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}
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continue
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}
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cur = append(cur, s[i])
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}
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if !flush() {
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return nil, false
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}
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if len(out) == 0 {
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return nil, false
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}
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return out, true
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}
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