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-rw-r--r--lib/tftp/src/tftp_binary.erl239
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diff --git a/lib/tftp/src/tftp_binary.erl b/lib/tftp/src/tftp_binary.erl
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2005-2016. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+
+%%%-------------------------------------------------------------------
+%%% File : tft_binary.erl
+%%% Author : Hakan Mattsson <[email protected]>
+%%% Description :
+%%%
+%%% Created : 24 May 2004 by Hakan Mattsson <[email protected]>
+%%%-------------------------------------------------------------------
+
+-module(tftp_binary).
+
+%%%-------------------------------------------------------------------
+%%% Interface
+%%%-------------------------------------------------------------------
+
+-behaviour(tftp).
+
+-export([prepare/6, open/6, read/1, write/2, abort/3]).
+
+-record(read_state, {options, blksize, bin, is_native_ascii, is_network_ascii, count}).
+-record(write_state, {options, blksize, list, is_native_ascii, is_network_ascii}).
+
+%%-------------------------------------------------------------------
+%% Prepare
+%%-------------------------------------------------------------------
+
+prepare(_Peer, Access, Filename, Mode, SuggestedOptions, Initial) when is_list(Initial) ->
+ %% Client side
+ IsNativeAscii = is_native_ascii(Initial),
+ case catch handle_options(Access, Filename, Mode, SuggestedOptions, IsNativeAscii) of
+ {ok, IsNetworkAscii, AcceptedOptions} when Access =:= read, is_binary(Filename) ->
+ State = #read_state{options = AcceptedOptions,
+ blksize = lookup_blksize(AcceptedOptions),
+ bin = Filename,
+ is_network_ascii = IsNetworkAscii,
+ count = size(Filename),
+ is_native_ascii = IsNativeAscii},
+ {ok, AcceptedOptions, State};
+ {ok, IsNetworkAscii, AcceptedOptions} when Access =:= write, Filename =:= binary ->
+ State = #write_state{options = AcceptedOptions,
+ blksize = lookup_blksize(AcceptedOptions),
+ list = [],
+ is_network_ascii = IsNetworkAscii,
+ is_native_ascii = IsNativeAscii},
+ {ok, AcceptedOptions, State};
+ {ok, _, _} ->
+ {error, {undef, "Illegal callback usage. Mode and filename is incompatible."}};
+ {error, {Code, Text}} ->
+ {error, {Code, Text}}
+ end;
+prepare(_Peer, _Access, _Bin, _Mode, _SuggestedOptions, _Initial) ->
+ {error, {undef, "Illegal callback options."}}.
+
+%%-------------------------------------------------------------------
+%% Open
+%%-------------------------------------------------------------------
+
+open(Peer, Access, Filename, Mode, SuggestedOptions, Initial) when is_list(Initial) ->
+ %% Server side
+ case prepare(Peer, Access, Filename, Mode, SuggestedOptions, Initial) of
+ {ok, AcceptedOptions, State} ->
+ open(Peer, Access, Filename, Mode, AcceptedOptions, State);
+ {error, {Code, Text}} ->
+ {error, {Code, Text}}
+ end;
+open(_Peer, Access, Filename, Mode, NegotiatedOptions, State) when is_record(State, read_state) ->
+ %% Both sides
+ case catch handle_options(Access, Filename, Mode, NegotiatedOptions, State#read_state.is_native_ascii) of
+ {ok, IsNetworkAscii, Options}
+ when Options =:= NegotiatedOptions,
+ IsNetworkAscii =:= State#read_state.is_network_ascii ->
+ {ok, NegotiatedOptions, State};
+ {error, {Code, Text}} ->
+ {error, {Code, Text}}
+ end;
+open(_Peer, Access, Filename, Mode, NegotiatedOptions, State) when is_record(State, write_state) ->
+ %% Both sides
+ case catch handle_options(Access, Filename, Mode, NegotiatedOptions, State#write_state.is_native_ascii) of
+ {ok, IsNetworkAscii, Options}
+ when Options =:= NegotiatedOptions,
+ IsNetworkAscii =:= State#write_state.is_network_ascii ->
+ {ok, NegotiatedOptions, State};
+ {error, {Code, Text}} ->
+ {error, {Code, Text}}
+ end;
+open(Peer, Access, Filename, Mode, NegotiatedOptions, State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ State2 = upgrade_state(State),
+ open(Peer, Access, Filename, Mode, NegotiatedOptions, State2).
+
+%%-------------------------------------------------------------------
+%% Read
+%%-------------------------------------------------------------------
+
+read(#read_state{bin = Bin} = State) when is_binary(Bin) ->
+ BlkSize = State#read_state.blksize,
+ if
+ size(Bin) >= BlkSize ->
+ <<Block:BlkSize/binary, Bin2/binary>> = Bin,
+ State2 = State#read_state{bin = Bin2},
+ {more, Block, State2};
+ size(Bin) < BlkSize ->
+ {last, Bin, State#read_state.count}
+ end;
+read(State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ State2 = upgrade_state(State),
+ read(State2).
+
+%%-------------------------------------------------------------------
+%% Write
+%%-------------------------------------------------------------------
+
+write(Bin, #write_state{list = List} = State) when is_binary(Bin), is_list(List) ->
+ Size = size(Bin),
+ BlkSize = State#write_state.blksize,
+ if
+ Size =:= BlkSize ->
+ {more, State#write_state{list = [Bin | List]}};
+ Size < BlkSize ->
+ Bin2 = list_to_binary(lists:reverse([Bin | List])),
+ {last, Bin2}
+ end;
+write(Bin, State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ State2 = upgrade_state(State),
+ write(Bin, State2).
+
+%%-------------------------------------------------------------------
+%% Abort
+%%-------------------------------------------------------------------
+
+abort(_Code, _Text, #read_state{bin = Bin} = State)
+ when is_record(State, read_state), is_binary(Bin) ->
+ ok;
+abort(_Code, _Text, #write_state{list = List} = State)
+ when is_record(State, write_state), is_list(List) ->
+ ok;
+abort(Code, Text, State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ State2 = upgrade_state(State),
+ abort(Code, Text, State2).
+
+%%-------------------------------------------------------------------
+%% Process options
+%%-------------------------------------------------------------------
+
+handle_options(Access, Bin, Mode, Options, IsNativeAscii) ->
+ IsNetworkAscii = handle_mode(Mode, IsNativeAscii),
+ Options2 = do_handle_options(Access, Bin, Options),
+ {ok, IsNetworkAscii, Options2}.
+
+handle_mode(Mode, IsNativeAscii) ->
+ case Mode of
+ "netascii" when IsNativeAscii =:= true -> true;
+ "octet" -> false;
+ _ -> throw({error, {badop, "Illegal mode " ++ Mode}})
+ end.
+
+do_handle_options(Access, Bin, [{Key, Val} | T]) ->
+ case Key of
+ "tsize" ->
+ case Access of
+ read when Val =:= "0", is_binary(Bin) ->
+ Tsize = integer_to_list(size(Bin)),
+ [{Key, Tsize} | do_handle_options(Access, Bin, T)];
+ _ ->
+ handle_integer(Access, Bin, Key, Val, T, 0, infinity)
+ end;
+ "blksize" ->
+ handle_integer(Access, Bin, Key, Val, T, 8, 65464);
+ "timeout" ->
+ handle_integer(Access, Bin, Key, Val, T, 1, 255);
+ _ ->
+ do_handle_options(Access, Bin, T)
+ end;
+do_handle_options(_Access, _Bin, []) ->
+ [].
+
+
+handle_integer(Access, Bin, Key, Val, Options, Min, Max) ->
+ case catch list_to_integer(Val) of
+ {'EXIT', _} ->
+ do_handle_options(Access, Bin, Options);
+ Int when Int >= Min, Int =< Max ->
+ [{Key, Val} | do_handle_options(Access, Bin, Options)];
+ Int when Int >= Min, Max =:= infinity ->
+ [{Key, Val} | do_handle_options(Access, Bin, Options)];
+ _Int ->
+ throw({error, {badopt, "Illegal " ++ Key ++ " value " ++ Val}})
+ end.
+
+lookup_blksize(Options) ->
+ case lists:keysearch("blksize", 1, Options) of
+ {value, {_, Val}} ->
+ list_to_integer(Val);
+ false ->
+ 512
+ end.
+
+is_native_ascii([]) ->
+ is_native_ascii();
+is_native_ascii([{native_ascii, Bool}]) ->
+ case Bool of
+ true -> true;
+ false -> false
+ end.
+
+is_native_ascii() ->
+ case os:type() of
+ {win32, _} -> true;
+ _ -> false
+ end.
+
+%% Handle upgrade from old releases. Please, remove this function in next release.
+upgrade_state({read_state, Options, Blksize, Bin, IsNetworkAscii, Count}) ->
+ {read_state, Options, Blksize, Bin, false, IsNetworkAscii, Count};
+upgrade_state({write_state, Options, Blksize, List, IsNetworkAscii}) ->
+ {write_state, Options, Blksize, List, false, IsNetworkAscii}.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 00:12:09 +0000