add OS identification of nodes

The main goal of this is to check if we should keep supporting
older distributions.

/reviewed-on nexedi/re6stnet!9

re6st/registry.py

@@ -19,7 +19,7 @@ Authenticated communication:
   - the one of the last handshake (hello)
 """
 import base64, hmac, hashlib, httplib, inspect, json, logging
-import mailbox, os, random, select, smtplib, socket, sqlite3
+import mailbox, os, platform, random, select, smtplib, socket, sqlite3
 import string, struct, sys, threading, time, weakref, zlib
 from collections import defaultdict, deque
 from datetime import datetime
@@ -259,6 +259,15 @@ class RegistryServer(object):
                     raise Exception("Wrong HMAC")
                 key = hashlib.sha1(key).digest()
                 session[:] = hashlib.sha1(key).digest(),
+        else:
+            logging.info("%s%s: %s, %s",
+                method,
+                '(' + utils.ipFromBin(x509.networkFromCa(self.cert.ca)
+                                      + kw["client_prefix"])
+                + ')' if method == 'hello' else '',
+                request.headers.get("X-Forwarded-For") or
+                request.headers.get("host"),
+                request.headers.get("user-agent"))
         try:
             result = m(**kw)
         except HTTPError, e:
@@ -640,7 +649,7 @@ class RegistryServer(object):
 class RegistryClient(object):
 
     _hmac = None
-    user_agent = "re6stnet/" + version.version
+    user_agent = "re6stnet/%s, %s" % (version.version, platform.platform())
 
     def __init__(self, url, cert=None, auto_close=True):
         self.cert = cert

re6st/tunnel.py

-import errno, json, logging, os, random, socket
+import errno, json, logging, os, platform, random, socket
 import subprocess, struct, sys, time, weakref
 from collections import defaultdict, deque
 from bisect import bisect, insort
@@ -490,7 +490,7 @@ class BaseTunnelManager(object):
                 if ask:
                     return self._info(False)
             else:
-                return version.version
+                return "%s, %s" % (version.version, platform.platform())
         elif code == 5:
             # the registry wants to know the topology for debugging purpose
             if not peer or peer == self.cache.registry_prefix: