Decode radius packet

Options:

• attributes - leave attributes as :integers, defaults to :strings. :integers can be pattern matched with the macro's provided by Radius.Dict

Return an iolist of encoded packet

for request packets, leave packet.auth == nil, then I will generate one from random bytes. for reply packets, set packet.auth = request.auth, I will calc the reply hash with it.

packet.attrs :: [attr]
attr :: {type,value}
type :: String.t | integer | {"Vendor-Specific", vendor}
value :: integer | String.t | ipaddr
vendor :: String.t | integer
ipaddr :: {a,b,c,d} | {a,b,c,d,e,f,g,h}

@spec encode_reply(
  packet :: t(),
  request_authenticator :: binary(),
  options :: keyword()
) :: t()

Encode the reply packet into an iolist and put the result in the :raw key. The :auth key needs to be filled with the authenticator of the request packet.

Options:

• sign - true if you want to sign the request, false by default

@spec encode_request(packet :: t(), options :: keyword()) :: t()

Encode the request packet into an iolist and put the result in the :raw key. The :auth key will contain the authenticator used on the request.

Return the value of a given attribute, if found, or default otherwise.

Verify if the packet signature is valid.

(https://www.ietf.org/rfc/rfc2865.txt) (https://www.ietf.org/rfc/rfc2869.txt)