🎉 Initial commit

.github/workflows/linter.yml

@@ -0,0 +1,43 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+name: Linter
+
+permissions:
+  contents: read
+
+jobs:
+  golint:
+    name: Golint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.19'
+
+      - name: Install dependencies
+        run: |
+          sudo apt update
+          sudo apt install -y \
+            libpcap-dev \
+            llvm \
+            libbpf-dev \
+            linux-headers-$(uname -r)
+
+      - name: Generate eBPF object files and Go bindings
+        run: make bpf
+
+      - name: Go lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: latest
+          args: --timeout=10m

.gitignore

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+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+# Object files
+*.o
+
+# Editors/IDEs
+.vscode/
+
+# The executable
+tracer
+
+# PCAP files
+*.pcap*
+
+# Python scripts for testing
+*.py
+
+# Import directory
+import/
+
+# Profiling directory
+pprof/
+
+# Misc
+*.todo
+
+# Data folder
+data/*

Makefile

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+SHELL=/bin/bash
+
+.PHONY: help
+.DEFAULT_GOAL := build
+.ONESHELL:
+
+ARCH=$(shell uname -m)
+ifeq ($(ARCH),$(filter $(ARCH),aarch64 arm64))
+	BPF_TARGET=arm64
+	BPF_ARCH_SUFFIX=arm64
+else
+	BPF_TARGET=amd64
+	BPF_ARCH_SUFFIX=x86
+endif
+
+GOCMD := go
+GOBUILD := $(GOCMD) build
+GOGENERATE := $(GOCMD) generate
+GOTEST := $(GOCMD) test
+GOTOOL := $(GOCMD) tool
+CLANG := clang
+
+help: ## Print this help message.
+	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
+
+build: ## Build the program.
+	$(GOBUILD) -ldflags="-extldflags=-s -w" -o tracer .
+
+build-debug: ## Build the program without optimizations.
+	$(GOBUILD) -gcflags=all="-N -l" -o tracer .
+
+build-race: ## Build the program with -race flag.
+	$(GOBUILD) -race -ldflags="-extldflags=-s -w" -o tracer .
+
+bpf: ## Compile the object files for eBPF
+	BPF_TARGET="$(BPF_TARGET)" BPF_CFLAGS="-O2 -g -D__TARGET_ARCH_$(BPF_ARCH_SUFFIX)" $(GOGENERATE) tracer/tracer.go
+
+lint: ## Lint the source code.
+	golangci-lint run
+
+setcap:
+	sudo setcap cap_net_raw,cap_net_admin,cap_sys_admin,cap_sys_ptrace,cap_dac_override,cap_sys_resource,cap_sys_module=eip ./tracer
+
+run: setcap ## Run the program. Requires Hub being available on port 8898
+	./tracer -debug
+
+run-pcap: setcap ## Run the program with a PCAP file. Requires Hub being available on port 8898
+	./tracer -f ./import -port 8897 -debug
+
+run-race: setcap ## -race flag requires the GODEBUG=netdns=go
+	GODEBUG=netdns=go ./tracer -debug
+
+run-tls: setcap ## Run the program with TLS capture enabled. Requires Hub being available on port 8898
+	KUBESHARK_GLOBAL_LIBSSL_PID=$(shell ps -ef | awk '$$8=="python3" && $$9=="tls.py" {print $$2}') \
+		./tracer -debug
+
+test:
+	$(GOTEST) ./... -coverpkg=./... -race -coverprofile=coverage.out -covermode=atomic -v

README.md

@@ -0,0 +1,5 @@
+# Tracer
+
+The kernel tracer that attaches eBPF probes to containers for capturing TLS traffic.
+
+See [Makefile](./Makefile) for building and running the program.

go.mod

@@ -0,0 +1,39 @@
+module github.com/kubeshark/tracer
+
+go 1.19
+
+require (
+	github.com/Masterminds/semver v1.5.0
+	github.com/go-errors/errors v1.4.2
+	github.com/hashicorp/golang-lru v0.5.4
+	github.com/knightsc/gapstone v0.0.0-20191231144527-6fa5afaf11a9
+	github.com/kubeshark/ebpf v0.9.1
+	github.com/kubeshark/gopacket v1.1.21
+	github.com/moby/moby v20.10.17+incompatible
+	github.com/rs/zerolog v1.29.0
+	k8s.io/api v0.27.2
+)
+
+require (
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/sirupsen/logrus v1.8.1 // indirect
+	github.com/stretchr/testify v1.8.3 // indirect
+	golang.org/x/net v0.10.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gotest.tools/v3 v3.3.0 // indirect
+	k8s.io/apimachinery v0.27.2 // indirect
+	k8s.io/klog/v2 v2.90.1 // indirect
+	k8s.io/utils v0.0.0-20230209194617-a36077c30491 // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+)

go.sum

@@ -0,0 +1,135 @@
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main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"flag"
+	_ "net/http/pprof" // Blank import to pprof
+	"os"
+	"time"
+
+	"github.com/kubeshark/tracer/misc"
+	"github.com/kubeshark/tracer/tracer"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+// capture
+var procfs = flag.String("procfs", "/proc", "The procfs directory, used when mapping host volumes into a container")
+
+// development
+var debug = flag.Bool("debug", false, "Enable debug mode")
+
+func main() {
+	flag.Parse()
+
+	zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr, TimeFormat: time.RFC3339}).With().Caller().Logger()
+
+	if *debug {
+		zerolog.SetGlobalLevel(zerolog.DebugLevel)
+	}
+
+	misc.InitDataDir()
+
+	run()
+}
+
+func run() {
+	log.Info().Msg("Starting tracer...")
+
+	misc.RunID = time.Now().Unix()
+
+	streamsMap := tracer.NewTcpStreamMap()
+
+	tracer := createTracer(streamsMap)
+
+	go tracer.PollForLogging()
+	tracer.Poll(streamsMap)
+}

misc/chan.go

@@ -0,0 +1,6 @@
+package misc
+
+const (
+	PacketChannelBufferSize   = 1000
+	TlsCloseChannelBufferSize = 100
+)