ab9dd18bec
See https://github.com/hashicorp/consul/issues/3977 While trying to improve furthermore #3948 (This pull request is still valid since we are not using Compression to compute the result anyway). I saw a strange behaviour of dns library. Basically, msg.Len() and len(msg.Pack()) disagree on Message len. Thus, calculation of DNS response is false consul relies on msg.Len() instead of the result of Pack() This is linked to miekg/dns#453 and a fix has been provided with miekg/dns#454 Would it be possible to upgrade miekg/dns to a more recent function ? Consul might for instance upgrade to a post 1.0 release such as https://github.com/miekg/dns/releases/tag/v1.0.4
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package bpf
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import "fmt"
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// Assemble converts insts into raw instructions suitable for loading
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// into a BPF virtual machine.
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//
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// Currently, no optimization is attempted, the assembled program flow
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// is exactly as provided.
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func Assemble(insts []Instruction) ([]RawInstruction, error) {
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ret := make([]RawInstruction, len(insts))
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var err error
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for i, inst := range insts {
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ret[i], err = inst.Assemble()
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if err != nil {
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return nil, fmt.Errorf("assembling instruction %d: %s", i+1, err)
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}
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}
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return ret, nil
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}
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// Disassemble attempts to parse raw back into
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// Instructions. Unrecognized RawInstructions are assumed to be an
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// extension not implemented by this package, and are passed through
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// unchanged to the output. The allDecoded value reports whether insts
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// contains no RawInstructions.
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func Disassemble(raw []RawInstruction) (insts []Instruction, allDecoded bool) {
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insts = make([]Instruction, len(raw))
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allDecoded = true
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for i, r := range raw {
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insts[i] = r.Disassemble()
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if _, ok := insts[i].(RawInstruction); ok {
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allDecoded = false
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}
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}
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return insts, allDecoded
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}
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