slimta.util.proxyproto

Package providing support for the PROXY protocol on various edge services.

class slimta.util.proxyproto.ProxyProtocolV1([*args[, **kwargs]])

Bases: object

Implements version 1 of the proxy protocol, to avoid losing information about the original connection when routing traffic through a proxy. This process involves an extra line sent by the client at the beginning of every cconnection.

Mix-in before an implementation of EdgeServer to expect every connection to begin with a proxy protocol header. The address argument passed in to the handle() method will contain information about the original connection source, before proxying.

classmethod parse_pp_line(cls, line)

Given a bytestring containing a single line ending in CRLF, parse into two source and destination address tuples of the form (ip, port) and return them.

Parameters:line – Bytestring ending in CRLF Returns:Two tuples for source and destination addresses, as might be returned by getpeername() and getsockname().

classmethod mixin(cls, edge)

Dynamically mix-in the ProxyProtocolV1 class as a base of the given edge object. Use with caution.

Parameters:edge (EdgeServer) – the edge object to use proxy protocol on. Raises:ValueError

handle(sock, addr)

Intercepts calls to handle(), reads the proxy protocol header, and then resumes the original call.

class slimta.util.proxyproto.ProxyProtocolV2([*args[, **kwargs]])

Bases: object

Implements version 2 of the proxy protocol, to avoid losing information about the original connection when routing traffic through a proxy. This version is binary, and may be more efficient than version 1.

Mix-in before an implementation of EdgeServer to expect every connection to begin with a proxy protocol header. The address argument passed in to the handle() method will contain information about the original connection source, before proxying.

classmethod mixin(cls, edge)

Dynamically mix-in the ProxyProtocolV2 class as a base of the given edge object. Use with caution.

Parameters:edge (EdgeServer) – the edge object to use proxy protocol on. Raises:ValueError

handle(sock, addr)

Intercepts calls to handle(), reads the proxy protocol header, and then resumes the original call.

class slimta.util.proxyproto.ProxyProtocol([*args[, **kwargs]])

Bases: object

Reads the first 8 bytes from the socket to determine which version of the proxy protocol is active before handing processing off to either ProxyProtocolV1 or ProxyProtocolV2.

Mix-in before an implementation of EdgeServer to expect every connection to begin with a proxy protocol header. The address argument passed in to the handle() method will contain information about the original connection source, before proxying.

classmethod mixin(cls, edge)

Dynamically mix-in the ProxyProtocol class as a base of the given edge object. Use with caution.

Parameters:edge (EdgeServer) – the edge object to use proxy protocol on. Raises:ValueError

handle(sock, addr)

Intercepts calls to handle(), reads the proxy protocol header, and then resumes the original call.