ooni-probe-cli/internal/engine/experiment/webconnectivity/dnslookup.go
Simone Basso d57c78bc71
chore: merge probe-engine into probe-cli (#201)
This is how I did it:

1. `git clone https://github.com/ooni/probe-engine internal/engine`

2. ```
(cd internal/engine && git describe --tags)
v0.23.0
```

3. `nvim go.mod` (merging `go.mod` with `internal/engine/go.mod`

4. `rm -rf internal/.git internal/engine/go.{mod,sum}`

5. `git add internal/engine`

6. `find . -type f -name \*.go -exec sed -i 's@/ooni/probe-engine@/ooni/probe-cli/v3/internal/engine@g' {} \;`

7. `go build ./...` (passes)

8. `go test -race ./...` (temporary failure on RiseupVPN)

9. `go mod tidy`

10. this commit message

Once this piece of work is done, we can build a new version of `ooniprobe` that
is using `internal/engine` directly. We need to do more work to ensure all the
other functionality in `probe-engine` (e.g. making mobile packages) are still WAI.

Part of https://github.com/ooni/probe/issues/1335
2021-02-02 12:05:47 +01:00

60 lines
1.5 KiB
Go

package webconnectivity
import (
"context"
"fmt"
"net/url"
"sort"
"github.com/ooni/probe-cli/v3/internal/engine/experiment/urlgetter"
"github.com/ooni/probe-cli/v3/internal/engine/model"
)
// DNSLookupConfig contains settings for the DNS lookup.
type DNSLookupConfig struct {
Session model.ExperimentSession
URL *url.URL
}
// DNSLookupResult contains the result of the DNS lookup.
type DNSLookupResult struct {
Addrs map[string]int64
Failure *string
TestKeys urlgetter.TestKeys
}
// DNSLookup performs the DNS lookup part of Web Connectivity.
func DNSLookup(ctx context.Context, config DNSLookupConfig) (out DNSLookupResult) {
target := fmt.Sprintf("dnslookup://%s", config.URL.Hostname())
config.Session.Logger().Infof("%s...", target)
result, err := urlgetter.Getter{Session: config.Session, Target: target}.Get(ctx)
out.Addrs = make(map[string]int64)
for _, query := range result.Queries {
for _, answer := range query.Answers {
if answer.IPv4 != "" {
out.Addrs[answer.IPv4] = answer.ASN
continue
}
if answer.IPv6 != "" {
out.Addrs[answer.IPv6] = answer.ASN
}
}
}
config.Session.Logger().Infof("%s... %+v", target, err)
out.Failure = result.Failure
out.TestKeys = result
return
}
// Addresses returns the IP addresses in the DNSLookupResult
func (r DNSLookupResult) Addresses() (out []string) {
out = []string{}
for addr := range r.Addrs {
out = append(out, addr)
}
sort.Slice(out, func(i, j int) bool {
return out[i] < out[j]
})
return
}