varlen

class cell.varlen.VarLenCell(header, payload=None)

Bases: oppy.cell.cell.Cell

A container class for representing a variable-length cell.

getBytes(trimmed=False)

Build and return the raw byte string this cell represents.

Parameters:trimmed (bool) – ignored for varlen cells Returns:str raw byte string represented by this cell

payloadRange()

Return a two-tuple indicating the start, end positions of this cell’s payload.

Returns:tuple, int (start, end) positions of this cell’s payload

class Header(circ_id=None, cmd=None, payload_len=None, link_version=3)

Bases: object

A simple container class for representing the header information of a variable-length cell.

getBytes()

Build and return the raw byte string represented by this header.

Returns:str raw byte string this header represents

class cell.varlen.AuthChallengeCell(header, challenge=None, n_methods=None, methods=None)

Bases: cell.varlen.VarLenCell

Note

tor-spec, Section 4.3

getBytes(trimmed=False)

Build and return raw byte string representing this cell.

Parameters:trimmed (bool) – ignored for varlen cells Returns:str – raw bytes representing this cell.

class cell.varlen.AuthenticateCell(header)

Bases: cell.varlen.VarLenCell

Note

Not Implemented

class cell.varlen.AuthorizeCell(header)

Bases: cell.varlen.VarLenCell

Note

Not Implemented

class cell.varlen.CertsCell(header, num_certs=None, cert_bytes=None)

Bases: cell.varlen.VarLenCell

Note

tor-spec, Section 4.2

getBytes(trimmed=False)

Build and return raw byte string represeting this cell.

Parameters:trimmed (bool) – ignore for varlen cells Returns:str raw byte string representing this cell.

class cell.varlen.VersionsCell(header, versions=None)

Bases: cell.varlen.VarLenCell

Note

tor-spec, Section 4.1

static make(versions)

Construct and return a VersionsCell, using default values where possible.

Automatically create and use an appropriate FixedLenCell.Header.

Parameters:int versions (list,) – Link Protocol versions to indicate support for in this VersionsCell Returns:VersionsCell

getBytes(trimmed=False)

Build and return raw byte string representing this cell.

Parameters:trimmed (bool) – ignored for varlen cells Returns:str – raw byte string representing this cell.

class cell.varlen.VPaddingCell(header, payload=None)

Bases: cell.varlen.VarLenCell

Note

tor-spec, Section 3, 4, 7.2