Add ssl-multicast-sources

Author: g3force

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2.1
 parameters:
   cmds:
     type: string
-    default: "ssl-auto-recorder ssl-log-converter ssl-log-cutter ssl-log-indexer ssl-log-player ssl-log-recorder ssl-log-stats ssl-vision-tracker-client"
+    default: "ssl-auto-recorder ssl-log-converter ssl-log-cutter ssl-log-indexer ssl-log-player ssl-log-recorder ssl-log-stats ssl-vision-tracker-client ssl-multicast-sources"
 
 jobs:
   test_go:

Makefile

@@ -1,4 +1,4 @@
-CMDS = ssl-auto-recorder ssl-log-converter ssl-log-cutter ssl-log-indexer ssl-log-player ssl-log-recorder ssl-log-stats ssl-vision-tracker-client
+CMDS = ssl-auto-recorder ssl-log-converter ssl-log-cutter ssl-log-indexer ssl-log-player ssl-log-recorder ssl-log-stats ssl-vision-tracker-client ssl-multicast-sources
 DOCKER_TARGETS = $(addprefix docker-, $(CMDS))
 .PHONY: all docker test install proto $(DOCKER_TARGETS)
 

cmd/ssl-multicast-sources/README.md

@@ -0,0 +1,13 @@
+# ssl-multicast-sources
+
+Detect IPs of multicast message producers for debugging purposes.
+By default, it looks for all multicast groups and ports that are used by default in the SSL.
+
+## Usage
+
+The binary is called `ssl-multicast-sources`.
+Pass custom multicast IPs/ports like this:
+
+```shell
+ssl-multicast-sources 224.5.23.1:10003 224.5.23.2:10006
+```

cmd/ssl-multicast-sources/main.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"net"
+	"time"
+)
+
+const maxDatagramSize = 8192
+
+var detectedRemotes map[string][]string
+
+func main() {
+	flag.Parse()
+
+	detectedRemotes = map[string][]string{}
+	mcAddresses := flag.Args()
+	if len(mcAddresses) == 0 {
+		mcAddresses = []string{"224.5.23.1:10003", "224.5.23.2:10006", "224.5.23.2:10010", "224.5.23.2:10012"}
+	}
+
+	for _, address := range mcAddresses {
+		go watchAddress(address)
+	}
+
+	for {
+		time.Sleep(1 * time.Second)
+	}
+}
+
+func watchAddress(address string) {
+	addr, err := net.ResolveUDPAddr("udp", address)
+	if err != nil {
+		log.Fatal(err)
+	}
+	conn, err := net.ListenMulticastUDP("udp", nil, addr)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if err := conn.SetReadBuffer(maxDatagramSize); err != nil {
+		log.Printf("Could not set read buffer to %v.", maxDatagramSize)
+	}
+	log.Println("Receiving from", address)
+	for {
+		_, udpAddr, err := conn.ReadFromUDP([]byte{0})
+		if err != nil {
+			log.Print("Could not read: ", err)
+			time.Sleep(1 * time.Second)
+			continue
+		}
+		addRemote(address, udpAddr.IP.String())
+	}
+}
+
+func addRemote(address string, remote string) {
+	remotes, ok := detectedRemotes[address]
+	if !ok {
+		detectedRemotes[address] = []string{}
+	}
+	for _, a := range remotes {
+		if a == remote {
+			return
+		}
+	}
+
+	detectedRemotes[address] = append(detectedRemotes[address], remote)
+	log.Printf("remote ip on %v: %v\n", address, remote)
+}