ci: begin transition from circleci to gh actions and goreleaser

Build + test + vet all push/PR events.  Pushing tags starting with 'v'
will perform a draft release driven by GoReleaser.

Fixes to allow vet to pass.

Author: kmroz

.circleci/config.yml

@@ -0,0 +1,51 @@
+name: builder-releaser
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: write
+
+jobs:
+  build-test-vet-release:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      -
+        name: Build
+        run: go build -v ./...
+      -
+        name: Test
+        run: go test -v ./...
+      -
+        name: Vet
+        run: go vet -v ./...
+      -
+        if: startsWith(github.ref, 'refs/tags/v') == true
+        name: Import GPG key
+        id: import_gpg
+        uses: crazy-max/ghaction-import-gpg@v3
+        with:
+          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.GPG_PRIVATE_KEY_PASSPHRASE }}
+      -
+        if: startsWith(github.ref, 'refs/tags/v') == true
+        name: GoReleaser
+        uses: goreleaser/goreleaser-action@v2
+        with:
+          # either 'goreleaser' (default) or 'goreleaser-pro'
+          distribution: goreleaser
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # Your GoReleaser Pro key, if you are using the 'goreleaser-pro' distribution
+          # GORELEASER_KEY: ${{ secrets.GORELEASER_KEY }}

.github/workflows/go.yml

@@ -0,0 +1,64 @@
+builds:
+  # You can have multiple builds defined as a yaml list.
+  -
+    goos:
+      - linux
+      - freebsd
+      - darwin
+      - windows
+    # GOARCH to build for.
+    # For more info refer to: https://golang.org/doc/install/source#environment
+    # Defaults are 386, amd64 and arm64.
+    goarch:
+      - amd64
+
+nfpms:
+  # note that this is an array of nfpm configs
+  -
+    # Replacements for GOOS and GOARCH in the package name.
+    # Keys should be valid GOOSs or GOARCHs.
+    # Values are the respective replacements.
+    # Default is empty.
+    replacements:
+      amd64: 64-bit
+      darwin: macOS
+    vendor: alphasoc
+    homepage: https://alphasoc.com/
+    maintainer: AlphaSOC <[email protected]>
+    description: A lightweight utility used to generate malicious network traffic and help
+                 security teams to evaluate security controls and network visibility.
+    license: CCPL
+    # Formats to be generated.
+    formats:
+      - deb
+      - rpm
+      - apk
+
+release:
+  # If set to auto, will mark the release as not ready for production
+  # in case there is an indicator for this in the tag e.g. v1.0.0-rc1
+  # If set to true, will mark the release as not ready for production.
+  # Default is false.
+  prerelease: auto
+  # If set to true, will not auto-publish the release.
+  # Default is false.
+  draft: true
+  # Header template for the release body.
+  header: |
+    ## Flightsim Release - {{ time "2006-02-01" }}
+
+    Welcome to this new release!
+
+  # Footer template for the release body.
+  footer: |
+    ## Enjoy!
+
+    Those were the changes on {{ .Tag }}!
+
+  # You can change the name of the release.
+  # Default is `{{.Tag}}` on OSS and `{{.PrefixedTag}}` on Pro.
+  name_template: "{{.ProjectName}}-v{{.Version}}"
+
+# Sign all artifacts.
+signs:
+  - artifacts: all

.goreleaser.yml

@@ -109,7 +109,8 @@ func (s *PortScan) Simulate(ctx context.Context, dst string) error {
 	// TODO: allow for multiple connection in parallel and hence a longer deadline
 
 	for _, port := range scanPorts {
-		ctx, _ := context.WithTimeout(ctx, callTimeout)
+		ctx, cancelFn := context.WithTimeout(ctx, callTimeout)
+		defer cancelFn()
 		err := s.tcp.Simulate(ctx, fmt.Sprintf("%s:%d", dst, port))
 		if err != nil {
 			return err

simulator/scan.go

@@ -50,7 +50,8 @@ func (s *Tunnel) Simulate(ctx context.Context, host string) error {
 
 		label := strings.ToLower(utils.RandString(30))
 
-		ctx, _ := context.WithTimeout(ctx, 200*time.Millisecond)
+		ctx, cancelFn := context.WithTimeout(ctx, 200*time.Millisecond)
+		defer cancelFn()
 		_, err := r.LookupTXT(ctx, fmt.Sprintf("%s.%s", label, host))
 
 		// ignore timeout and "no such host"
@@ -61,8 +62,6 @@ func (s *Tunnel) Simulate(ctx context.Context, host string) error {
 		// wait until context expires so we don't flood
 		<-ctx.Done()
 	}
-
-	return nil
 }
 
 // Hosts returns random generated hosts to alphasoc sandbox.