chg: [doc] update the README for d4 forwarding

README.md

@@ -19,21 +19,12 @@ For more information about the [D4 project](https://www.d4-project.org/).
 Fetch d4-goclient code and dependencies
 
 ```bash
-go get github.com/satori/go.uuid
 go get github.com/D4-project/d4-goclient
 ```
 
-Use make to build binaries:
-
-```bash
-make arm5l  # for raspberry pi / linux
-make amd64l # for amd64 / linux
-```
-
 ## Dependencies
 
- - golang 1.10 (tested)
- - go.uuid
+ - golang 1.13 (tested)
 
 # Use
 
@@ -47,13 +38,17 @@ Part of the client configuration can be stored in folder containing the followin
 
  - key: your Pre-Shared-Key
  - snaplen: default is 4096
- - source: stdin
+ - source: stdin or d4server
  - destination: stdout, [fe80::ffff:ffff:ffff:a6fb]:4443, 127.0.0.1:4443
- - type: D4 packat type, see [types](https://github.com/D4-project/architecture/tree/master/format)
- - uuid: generated automiatically if empty
+ - type: D4 packet type, see [types](https://github.com/D4-project/architecture/tree/master/format)
+ - uuid: generated automatically if empty
  - version: protocol version
  - rootCA.crt: optional : CA certificate to check the server certificate
  - metaheader.json: optional : a json file describing feed's meta-type [types](https://github.com/D4-project/architecture/tree/master/format)
+ 
+If source is set to d4server, then one also 2 additional files:
+ - redis_queue: redis queue in the form analyzer:typeofqueue:queueuuid, for instance analyzer:3:d42967c1-f7ad-464e-bbc7-4464c653d7a6
+ - redis_d4: redis server location:port/database, for instance localhost:6385/2
 
 ## Flags
 
@@ -68,6 +63,8 @@ Part of the client configuration can be stored in folder containing the followin
     	Keep Alive time human format, 0 to disable (default 30s)
   -ct duration
     	Set timeout in human format
+  -rl duration
+        Rate limiter: time in human format before retry after EOF (default 200ms)
   -rt duration
     	Time in human format before retry after connection failure, set to 0 to exit on failure (default 30s)
   -v	Set to True, true, TRUE, 1, or t to enable verbose output on stdout
@@ -86,3 +83,8 @@ $IP being the monitoring computer ip
 ```bash
 tcpdump not dst $IP and not src $IP -w - | ./d4-goclient -c conf.sample/ |  socat - OPENSSL-CONNECT:$IP_SRV:$PORT,verify=0
 ```
+
+## Forwarding data from a D4 server to another D4 server
+Add two files to you configuration folder: `redis_d4` and `redis_queue`:
+ - `redis_d4` contains the location of the source d4's redis server database, for instance `127.0.0.1:6380/2`
+ - `redis_queue` contains the queue to forward to the other D4 server, for instance `analyzer:3:d42967c1-f7ad-464e-bbc7-4464c653d7a6`