Package dns :: Module rdata |
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# Module rdata

source code

DNS rdata.

Classes | [hide private]
| Rdata Base class for all DNS rdata types.
| GenericRdata Generate Rdata Class

Functions | [hide private]
string |
_hexify(data, chunksize=32) Convert a binary string into its hex encoding, broken up into chunks of chunksize characters separated by a space. | source code
string |
_base64ify(data, chunksize=32) Convert a binary string into its base64 encoding, broken up into chunks of chunksize characters separated by a space. | source code
string |
_escapify(qstring) Escape the characters in a quoted string which need it. | source code
string |
_truncate_bitmap(what) Determine the index of greatest byte that isn't all zeros, and return the bitmap that contains all the bytes less than that index. | source code
get_rdata_class(rdclass, rdtype) | source code
dns.rdata.Rdata instance |
from_text(rdclass, rdtype, tok, origin=None, relativize=True) Build an rdata object from text format. | source code
dns.rdata.Rdata instance |
from_wire(rdclass, rdtype, wire, current, rdlen, origin=None) Build an rdata object from wire format | source code

Variables | [hide private]
| _hex_chunksize = `32`
| _base64_chunksize = `32`
| __escaped = `bytearray(b'"\\')`
dict | _rdata_modules = ``{``}`` A dictionary mapping a (rdclass, rdtype) tuple to the module which implements that type.
string | _module_prefix = ``'``dns.rdtypes``'`` The prefix to use when forming modules names.
| __package__ = ``'``dns``'``
int | _hex_chunk At most this many octets that will be represented in each chunk of hexstring that _hexify() produces before whitespace occurs.

Function Details | [hide private]

### _hexify(data, chunksize=32) | source code
Convert a binary string into its hex encoding, broken up into chunks of chunksize characters separated by a space. Parameters: `data` (string) - the binary string `chunksize` - the chunk size. Default is dns.rdata._hex_chunksize Returns: string

### _base64ify(data, chunksize=32) | source code
Convert a binary string into its base64 encoding, broken up into chunks of chunksize characters separated by a space. Parameters: `data` (string) - the binary string `chunksize` - the chunk size. Default is dns.rdata._base64_chunksize Returns: string

### _escapify(qstring) | source code
Escape the characters in a quoted string which need it. Parameters: `qstring` (string) - the string Returns: string the escaped string

### _truncate_bitmap(what) | source code
Determine the index of greatest byte that isn't all zeros, and return the bitmap that contains all the bytes less than that index. Parameters: `what` (string) - a string of octets representing a bitmap. Returns: string

### from_text(rdclass, rdtype, tok, origin=None, relativize=True) | source code
Build an rdata object from text format. This function attempts to dynamically load a class which implements the specified rdata class and type. If there is no class-and-type-specific implementation, the GenericRdata class is used. Once a class is chosen, its from_text() class method is called with the parameters to this function. If tok is a string, then a tokenizer is created and the string is used as its input. Parameters: `rdclass` (int) - The rdata class `rdtype` (int) - The rdata type `tok` (dns.tokenizer.Tokenizer or string) - The tokenizer or input text `origin` (dns.name.Name) - The origin to use for relative names `relativize` (bool) - Should names be relativized? Returns: dns.rdata.Rdata instance

### from_wire(rdclass, rdtype, wire, current, rdlen, origin=None) | source code
Build an rdata object from wire format This function attempts to dynamically load a class which implements the specified rdata class and type. If there is no class-and-type-specific implementation, the GenericRdata class is used. Once a class is chosen, its from_wire() class method is called with the parameters to this function. Parameters: `rdclass` (int) - The rdata class `rdtype` (int) - The rdata type `wire` (string) - The wire-format message `current` (int) - The offset in wire of the beginning of the rdata. `rdlen` (int) - The length of the wire-format rdata `origin` (dns.name.Name) - The origin to use for relative names Returns: dns.rdata.Rdata instance

Variables Details | [hide private]

  ### _module_prefix The prefix to use when forming modules names. The default is 'dns.rdtypes'. Changing this value will break the library. Type: string Value:
      'dns.rdtypes'