Adding upstream version 2.7.6.upstream/2.7.6upstream

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

2 files changed, 444 insertions, 0 deletions

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