Adding upstream version 2.7.6.upstream/2.7.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 1163 insertions, 0 deletions

diff --git a/python/Makefile.am b/python/Makefile.am
new file mode 100644
index 0000000..dd76d62
--- /dev/null
+++ b/python/Makefile.am
@@ -0,0 +1,15 @@
+EXTRA_DIST =			\
+	libknot/__init__.py.in	\
+	libknot/control.py	\
+	setup.py.in		\
+	stats_http.py		\
+	stats_influxdb.py
+	
+clean-local:
+	-rm -rf dist *.egg-info
+
+dist: clean-local
+	python3 setup.py sdist
+
+upload:
+	twine upload dist/*
diff --git a/python/Makefile.in b/python/Makefile.in
new file mode 100644
index 0000000..19d328a
--- /dev/null
+++ b/python/Makefile.in
@@ -0,0 +1,525 @@
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+	libknot/control.py	\
+	setup.py.in		\
+	stats_http.py		\
+	stats_influxdb.py
+
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+
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+clean-local:
+	-rm -rf dist *.egg-info
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+dist: clean-local
+	python3 setup.py sdist
+
+upload:
+	twine upload dist/*
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/python/libknot/__init__.py.in b/python/libknot/__init__.py.in
new file mode 100644
index 0000000..5984340
--- /dev/null
+++ b/python/libknot/__init__.py.in
@@ -0,0 +1,3 @@
+"""Python libknot interface."""
+
+LIBKNOT_VERSION = "@libknot_SOVERSION@"
diff --git a/python/libknot/control.py b/python/libknot/control.py
new file mode 100755
index 0000000..ced1be6
--- /dev/null
+++ b/python/libknot/control.py
@@ -0,0 +1,441 @@
+"""Libknot server control interface wrapper.
+
+Example:
+    import json
+    from libknot.control import *
+
+    #load_lib("/usr/lib/libknot.so")
+
+    ctl = KnotCtl()
+    ctl.connect("/var/run/knot/knot.sock")
+
+    try:
+        ctl.send_block(cmd="conf-begin")
+        resp = ctl.receive_block()
+
+        ctl.send_block(cmd="conf-set", section="zone", item="domain", data="test")
+        resp = ctl.receive_block()
+
+        ctl.send_block(cmd="conf-commit")
+        resp = ctl.receive_block()
+
+        ctl.send_block(cmd="conf-read", section="zone", item="domain")
+        resp = ctl.receive_block()
+        print(json.dumps(resp, indent=4))
+    finally:
+        ctl.send(KnotCtlType.END)
+        ctl.close()
+"""
+
+from ctypes import cdll, c_void_p, c_int, c_char_p, c_uint, byref
+from enum import IntEnum
+import sys
+
+CTL_ALLOC = None
+CTL_FREE = None
+CTL_SET_TIMEOUT = None
+CTL_CONNECT = None
+CTL_CLOSE = None
+CTL_SEND = None
+CTL_RECEIVE = None
+CTL_ERROR = None
+
+
+def load_lib(path=None):
+    """Loads the libknot library."""
+
+    if path is None:
+        version = ""
+        try:
+            from libknot import LIBKNOT_VERSION
+            version = ".%u" % int(LIBKNOT_VERSION)
+        except:
+            pass
+
+        if sys.platform == "darwin":
+            path = "libknot%s.dylib" % version
+        else:
+            path = "libknot.so%s" % version
+    LIB = cdll.LoadLibrary(path)
+
+    global CTL_ALLOC
+    CTL_ALLOC = LIB.knot_ctl_alloc
+    CTL_ALLOC.restype = c_void_p
+
+    global CTL_FREE
+    CTL_FREE = LIB.knot_ctl_free
+    CTL_FREE.argtypes = [c_void_p]
+
+    global CTL_SET_TIMEOUT
+    CTL_SET_TIMEOUT = LIB.knot_ctl_set_timeout
+    CTL_SET_TIMEOUT.argtypes = [c_void_p, c_int]
+
+    global CTL_CONNECT
+    CTL_CONNECT = LIB.knot_ctl_connect
+    CTL_CONNECT.restype = c_int
+    CTL_CONNECT.argtypes = [c_void_p, c_char_p]
+
+    global CTL_CLOSE
+    CTL_CLOSE = LIB.knot_ctl_close
+    CTL_CLOSE.argtypes = [c_void_p]
+
+    global CTL_SEND
+    CTL_SEND = LIB.knot_ctl_send
+    CTL_SEND.restype = c_int
+    CTL_SEND.argtypes = [c_void_p, c_uint, c_void_p]
+
+    global CTL_RECEIVE
+    CTL_RECEIVE = LIB.knot_ctl_receive
+    CTL_RECEIVE.restype = c_int
+    CTL_RECEIVE.argtypes = [c_void_p, c_void_p, c_void_p]
+
+    global CTL_ERROR
+    CTL_ERROR = LIB.knot_strerror
+    CTL_ERROR.restype = c_char_p
+    CTL_ERROR.argtypes = [c_int]
+
+
+class KnotCtlError(Exception):
+    """Libknot server control error."""
+
+    def __init__(self, message, data=None):
+        """
+        @type message: str
+        @type data: KnotCtlData
+        """
+
+        self.message = message
+        self.data = data
+
+    def __str__(self):
+        return "%s (data: %s)" % (self.message, self.data)
+
+
+class KnotCtlType(IntEnum):
+    """Libknot server control data unit types."""
+
+    END = 0
+    DATA = 1
+    EXTRA = 2
+    BLOCK = 3
+
+
+class KnotCtlDataIdx(IntEnum):
+    """Libknot server control data unit indices."""
+
+    COMMAND = 0
+    FLAGS = 1
+    ERROR = 2
+    SECTION = 3
+    ITEM = 4
+    ID = 5
+    ZONE = 6
+    OWNER = 7
+    TTL = 8
+    TYPE = 9
+    DATA = 10
+    FILTER = 11
+
+
+class KnotCtlData(object):
+    """Libknot server control data unit."""
+
+    DataArray = c_char_p * len(KnotCtlDataIdx)
+
+    def __init__(self):
+        self.data = self.DataArray()
+
+    def __str__(self):
+        string = str()
+
+        for idx in KnotCtlDataIdx:
+            if self.data[idx]:
+                if string:
+                    string += ", "
+                string += "%s = %s" % (idx.name, self.data[idx])
+
+        return string
+
+    def __getitem__(self, index):
+        """Data unit item getter.
+
+        @type index: KnotCtlDataIdx
+        @rtype: str
+        """
+
+        value = self.data[index]
+        if not value:
+            value = str()
+        return value if isinstance(value, str) else value.decode()
+
+    def __setitem__(self, index, value):
+        """Data unit item setter.
+
+        @type index: KnotCtlDataIdx
+        @type value: str
+        """
+
+        self.data[index] = c_char_p(value.encode()) if value else c_char_p()
+
+class KnotCtl(object):
+    """Libknot server control interface."""
+
+    def __init__(self):
+        if not CTL_ALLOC:
+            load_lib()
+        self.obj = CTL_ALLOC()
+
+    def __del__(self):
+        CTL_FREE(self.obj)
+
+    def set_timeout(self, timeout):
+        """Sets control socket operations timeout in seconds.
+
+        @type timeout: int
+        """
+
+        CTL_SET_TIMEOUT(self.obj, timeout * 1000)
+
+    def connect(self, path):
+        """Connect to a specified control UNIX socket.
+
+        @type path: str
+        """
+
+        ret = CTL_CONNECT(self.obj, path.encode())
+        if ret != 0:
+            err = CTL_ERROR(ret)
+            raise KnotCtlError(err if isinstance(err, str) else err.decode())
+
+    def close(self):
+        """Disconnects from the current control socket."""
+
+        CTL_CLOSE(self.obj)
+
+    def send(self, data_type, data=None):
+        """Sends a data unit to the connected control socket.
+
+        @type data_type: KnotCtlType
+        @type data: KnotCtlData
+        """
+
+        ret = CTL_SEND(self.obj, data_type,
+                       data.data if data else c_char_p())
+        if ret != 0:
+            err = CTL_ERROR(ret)
+            raise KnotCtlError(err if isinstance(err, str) else err.decode())
+
+    def receive(self, data=None):
+        """Receives a data unit from the connected control socket.
+
+        @type data: KnotCtlData
+        @rtype: KnotCtlType
+        """
+
+        data_type = c_uint()
+        ret = CTL_RECEIVE(self.obj, byref(data_type),
+                          data.data if data else c_char_p())
+        if ret != 0:
+            err = CTL_ERROR(ret)
+            raise KnotCtlError(err if isinstance(err, str) else err.decode())
+        return KnotCtlType(data_type.value)
+
+    def send_block(self, cmd, section=None, item=None, identifier=None, zone=None,
+                   owner=None, ttl=None, rtype=None, data=None, flags=None,
+                   filter=None):
+        """Sends a control query block.
+
+        @type cmd: str
+        @type section: str
+        @type item: str
+        @type identifier: str
+        @type zone: str
+        @type owner: str
+        @type ttl: str
+        @type rtype: str
+        @type data: str
+        @type filter: str
+        """
+
+        query = KnotCtlData()
+        query[KnotCtlDataIdx.COMMAND] = cmd
+        query[KnotCtlDataIdx.SECTION] = section
+        query[KnotCtlDataIdx.ITEM] = item
+        query[KnotCtlDataIdx.ID] = identifier
+        query[KnotCtlDataIdx.ZONE] = zone
+        query[KnotCtlDataIdx.OWNER] = owner
+        query[KnotCtlDataIdx.TTL] = ttl
+        query[KnotCtlDataIdx.TYPE] = rtype
+        query[KnotCtlDataIdx.DATA] = data
+        query[KnotCtlDataIdx.FLAGS] = flags
+        query[KnotCtlDataIdx.FILTER] = filter
+
+        self.send(KnotCtlType.DATA, query)
+        self.send(KnotCtlType.BLOCK)
+
+    def _receive_conf(self, out, reply):
+
+        section = reply[KnotCtlDataIdx.SECTION]
+        ident = reply[KnotCtlDataIdx.ID]
+        item = reply[KnotCtlDataIdx.ITEM]
+        data = reply[KnotCtlDataIdx.DATA]
+
+        # Add the section if not exists.
+        if section not in out:
+            out[section] = dict()
+
+        # Add the identifier if not exists.
+        if ident and ident not in out[section]:
+            out[section][ident] = dict()
+
+        # Return if no item/value.
+        if not item:
+            return
+
+        item_level = out[section][ident] if ident else out[section]
+
+        # Treat alone identifier item differently.
+        if item in ["id", "domain", "target"]:
+            if data not in out[section]:
+                out[section][data] = dict()
+        else:
+            if item not in item_level:
+                item_level[item] = list()
+
+            if data:
+                item_level[item].append(data)
+
+    def _receive_zone_status(self, out, reply):
+
+        zone = reply[KnotCtlDataIdx.ZONE]
+        rtype = reply[KnotCtlDataIdx.TYPE]
+        data = reply[KnotCtlDataIdx.DATA]
+
+        # Add the zone if not exists.
+        if zone not in out:
+            out[zone] = dict()
+
+        out[zone][rtype] = data
+
+    def _receive_zone(self, out, reply):
+
+        zone = reply[KnotCtlDataIdx.ZONE]
+        owner = reply[KnotCtlDataIdx.OWNER]
+        ttl = reply[KnotCtlDataIdx.TTL]
+        rtype = reply[KnotCtlDataIdx.TYPE]
+        data = reply[KnotCtlDataIdx.DATA]
+
+        # Add the zone if not exists.
+        if zone not in out:
+            out[zone] = dict()
+
+        if owner not in out[zone]:
+            out[zone][owner] = dict()
+
+        if rtype not in out[zone][owner]:
+            out[zone][owner][rtype] = dict()
+
+        # Add the key/value.
+        out[zone][owner][rtype]["ttl"] = ttl
+
+        if not "data" in out[zone][owner][rtype]:
+            out[zone][owner][rtype]["data"] = [data]
+        else:
+            out[zone][owner][rtype]["data"].append(data)
+
+    def _receive_stats(self, out, reply):
+
+        zone = reply[KnotCtlDataIdx.ZONE]
+        section = reply[KnotCtlDataIdx.SECTION]
+        item = reply[KnotCtlDataIdx.ITEM]
+        idx = reply[KnotCtlDataIdx.ID]
+        data = int(reply[KnotCtlDataIdx.DATA])
+
+        # Add the zone if not exists.
+        if zone:
+            if "zone" not in out:
+                out["zone"] = dict()
+
+            if zone not in out["zone"]:
+                out["zone"][zone] = dict()
+
+        section_level = out["zone"][zone] if zone else out
+
+        if section not in section_level:
+            section_level[section] = dict()
+
+        if idx:
+            if item not in section_level[section]:
+                section_level[section][item] = dict()
+
+            section_level[section][item][idx] = data
+        else:
+            section_level[section][item] = data
+
+    def receive_stats(self):
+        """Receives statistics answer and returns it as a structured dictionary.
+
+        @rtype: dict
+        """
+
+        out = dict()
+        err_reply = None
+
+        while True:
+            reply = KnotCtlData()
+            reply_type = self.receive(reply)
+
+            # Stop if not data type.
+            if reply_type not in [KnotCtlType.DATA, KnotCtlType.EXTRA]:
+                break
+
+            # Check for an error.
+            if reply[KnotCtlDataIdx.ERROR]:
+                err_reply = reply
+                continue
+
+            self._receive_stats(out, reply)
+
+        if err_reply:
+            raise KnotCtlError(err_reply[KnotCtlDataIdx.ERROR], err_reply)
+
+        return out
+
+    def receive_block(self):
+        """Receives a control answer and returns it as a structured dictionary.
+
+        @rtype: dict
+        """
+
+        out = dict()
+        err_reply = None
+
+        while True:
+            reply = KnotCtlData()
+            reply_type = self.receive(reply)
+
+            # Stop if not data type.
+            if reply_type not in [KnotCtlType.DATA, KnotCtlType.EXTRA]:
+                break
+
+            # Check for an error.
+            if reply[KnotCtlDataIdx.ERROR]:
+                err_reply = reply
+                continue
+
+            # Check for config data.
+            if reply[KnotCtlDataIdx.SECTION]:
+                self._receive_conf(out, reply)
+            # Check for zone data.
+            elif reply[KnotCtlDataIdx.ZONE]:
+                if reply[KnotCtlDataIdx.OWNER]:
+                    self._receive_zone(out, reply)
+                else:
+                    self._receive_zone_status(out, reply)
+            else:
+                continue
+
+        if err_reply:
+            raise KnotCtlError(err_reply[KnotCtlDataIdx.ERROR], err_reply)
+
+        return out
diff --git a/python/setup.py.in b/python/setup.py.in
new file mode 100644
index 0000000..8d57bc9
--- /dev/null
+++ b/python/setup.py.in
@@ -0,0 +1,27 @@
+import setuptools
+
+setuptools.setup(
+    name='libknot',
+    version='@PACKAGE_VERSION@',
+    description='Python bindings for libknot',
+    author='Daniel Salzman',
+    author_email='daniel.salzman@nic.cz',
+    url='https://gitlab.labs.nic.cz/knot/knot-dns',
+    license='GPL-3.0',
+    packages=['libknot'],
+    classifiers=[ # See https://pypi.org/classifiers
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: Developers',
+        'Intended Audience :: System Administrators',
+        'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Topic :: Internet :: Name Service (DNS)',
+        'Topic :: Software Development :: Libraries',
+        'Topic :: System :: Systems Administration',
+    ]
+)
diff --git a/python/stats_http.py b/python/stats_http.py
new file mode 100755
index 0000000..a38d5f7
--- /dev/null
+++ b/python/stats_http.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+
+"""Simple program for exposing statistics from Knot DNS over HTTP/HTTPS."""
+
+import http.server
+import libknot.control
+import json
+import ssl
+import time
+
+# Configuration.
+#libknot.control.load_lib("../src/.libs/libknot.so")
+ctl_socket = "/tmp/knot.sock"
+ctl_timeout = 2
+ctl_flags = "" # set "F" for all supported counters.
+http_host = "127.0.0.1"
+http_port = 8080
+ssl_enable = False
+ssl_keyfile = "./mykey.key"
+ssl_certfile = "./mycert.crt"
+
+
+class StatsServer(http.server.BaseHTTPRequestHandler):
+    def do_GET(self):
+        self.send_response(200)
+        self.send_header("Content-type", "text/html")
+        self.end_headers()
+
+        # Connect to Knot server.
+        ctl = libknot.control.KnotCtl()
+        ctl.connect(ctl_socket)
+        ctl.set_timeout(ctl_timeout)
+
+        # Get global metrics.
+        global_stats = dict()
+        try:
+            ctl.send_block(cmd="stats", flags=ctl_flags)
+            global_stats = ctl.receive_stats()
+        except:
+            pass
+
+        # Get zone metrics.
+        zone_stats = dict()
+        try:
+            ctl.send_block(cmd="zone-stats", flags=ctl_flags)
+            zone_stats = ctl.receive_stats()
+        except:
+           pass
+
+        # Disconnect from the server.
+        ctl.send(libknot.control.KnotCtlType.END)
+        ctl.close()
+
+        # Publish the stats.
+        stats = {**global_stats, **zone_stats}
+        self.wfile.write(bytes(json.dumps(stats, indent=4, sort_keys=True), "utf-8"))
+
+
+httpd = http.server.HTTPServer((http_host, http_port), StatsServer)
+
+if ssl_enable:
+    httpd.socket = ssl.wrap_socket(httpd.socket, keyfile=ssl_keyfile,
+                                   certfile=ssl_certfile, server_side=True)
+
+print("%s: HTTP%s Server Start - %s:%s" %
+      (time.asctime(), "S" if ssl_enable else "", http_host, http_port))
+
+try:
+    httpd.serve_forever()
+except KeyboardInterrupt:
+    pass
+
+httpd.server_close()
diff --git a/python/stats_influxdb.py b/python/stats_influxdb.py
new file mode 100755
index 0000000..33d3709
--- /dev/null
+++ b/python/stats_influxdb.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+
+"""Simple program for exporting statistics from Knot DNS to influxdb."""
+
+import libknot.control
+import io
+import json
+import os
+import time
+
+# Configuration.
+#libknot.control.load_lib("../src/.libs/libknot.so")
+ctl_socket = "/tmp/knot.sock"
+ctl_timeout = 2
+# InfluxDB parameters.
+host = "217.31.192.164"
+port = "8086"
+db = "KnotDNS"
+instance = "Knot"
+# Send metrics every N seconds.
+send_interval = 5
+
+
+def send():
+    # Connect to Knot server.
+    ctl = libknot.control.KnotCtl()
+    ctl.connect(ctl_socket)
+    ctl.set_timeout(ctl_timeout)
+
+    # Get global metrics.
+    global_stats = dict()
+    try:
+        ctl.send_block(cmd="stats", flags="F")
+        global_stats = ctl.receive_stats()
+    except:
+        pass
+
+    # Get zone metrics.
+    zone_stats = dict()
+    try:
+        ctl.send_block(cmd="zone-stats", flags="F")
+        zone_stats = ctl.receive_stats()
+    except:
+        pass
+
+    # Disconnect from the server.
+    ctl.send(libknot.control.KnotCtlType.END)
+    ctl.close()
+
+    # Prepare the metrics to publish.
+    output = io.StringIO()
+
+    stats = {**global_stats, **zone_stats}
+    timestamp = str(int(time.time()))
+
+    for metric in stats["server"]:
+        print("server,instance=" + instance + ",metric=" + metric + " value=" +
+              stats["server"][metric] + " " + timestamp, file=output)
+
+    for group in stats["mod-stats"]:
+        for metric in stats["mod-stats"][group]:
+            print(group + ",instance=" + instance + ",metric=" + metric +
+                  " value=" + stats["mod-stats"][group][metric] + " " + timestamp,
+                  file=output)
+
+    # Publish the metrics.
+    os.system("curl -i -XPOST 'http://%s:%s/write?db=%s&precision=s' --data-binary '%s'"
+              % (host, port, db, output.getvalue()))
+
+
+print("%s: Graphite sender - Server Start - %s:%s" %
+      (time.asctime(), host, port))
+
+try:
+   while(True):
+      send()
+      time.sleep(send_interval)
+except KeyboardInterrupt:
+   pass