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-rw-r--r--lib/tftp/src/Makefile110
-rw-r--r--lib/tftp/src/tftp.app.src22
-rw-r--r--lib/tftp/src/tftp.appup.src26
-rw-r--r--lib/tftp/src/tftp.erl409
-rw-r--r--lib/tftp/src/tftp.hrl69
-rw-r--r--lib/tftp/src/tftp_app.erl47
-rw-r--r--lib/tftp/src/tftp_binary.erl239
-rw-r--r--lib/tftp/src/tftp_engine.erl1422
-rw-r--r--lib/tftp/src/tftp_file.erl390
-rw-r--r--lib/tftp/src/tftp_lib.erl474
-rw-r--r--lib/tftp/src/tftp_logger.erl99
-rw-r--r--lib/tftp/src/tftp_sup.erl111
12 files changed, 3418 insertions, 0 deletions
diff --git a/lib/tftp/src/Makefile b/lib/tftp/src/Makefile
new file mode 100644
index 0000000000..ed1551ba04
--- /dev/null
+++ b/lib/tftp/src/Makefile
@@ -0,0 +1,110 @@
+#
+# %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%
+#
+#
+
+include $(ERL_TOP)/make/target.mk
+include $(ERL_TOP)/make/$(TARGET)/otp.mk
+
+# ----------------------------------------------------
+# Application version
+# ----------------------------------------------------
+include ../vsn.mk
+VSN = $(TFTP_VSN)
+
+# ----------------------------------------------------
+# Release directory specification
+# ----------------------------------------------------
+RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN)
+
+# ----------------------------------------------------
+# Target Specs
+# ----------------------------------------------------
+BEHAVIOUR_MODULES=
+
+MODULES = \
+ tftp \
+ tftp_app \
+ tftp_binary \
+ tftp_engine \
+ tftp_file \
+ tftp_lib \
+ tftp_logger \
+ tftp_sup
+
+HRL_FILES = tftp.hrl
+
+ERL_FILES= \
+ $(MODULES:%=%.erl) \
+ $(BEHAVIOUR_MODULES:%=%.erl)
+
+TARGET_FILES= $(MODULES:%=$(EBIN)/%.$(EMULATOR))
+
+BEHAVIOUR_TARGET_FILES= $(BEHAVIOUR_MODULES:%=$(EBIN)/%.$(EMULATOR))
+
+APP_FILE= tftp.app
+APPUP_FILE= tftp.appup
+
+APP_SRC= $(APP_FILE).src
+APP_TARGET= $(EBIN)/$(APP_FILE)
+APPUP_SRC= $(APPUP_FILE).src
+APPUP_TARGET= $(EBIN)/$(APPUP_FILE)
+
+# ----------------------------------------------------
+# FLAGS
+# ----------------------------------------------------
+
+
+# ----------------------------------------------------
+# Targets
+# ----------------------------------------------------
+
+$(TARGET_FILES): $(BEHAVIOUR_TARGET_FILES)
+
+debug opt: $(TARGET_FILES) $(APP_TARGET) $(APPUP_TARGET)
+
+clean:
+ rm -f $(TARGET_FILES) $(APP_TARGET) $(APPUP_TARGET) $(BEHAVIOUR_TARGET_FILES)
+ rm -f core
+
+$(APP_TARGET): $(APP_SRC) ../vsn.mk
+ $(vsn_verbose)sed -e 's;%VSN%;$(VSN);' $< > $@
+
+$(APPUP_TARGET): $(APPUP_SRC) ../vsn.mk
+ $(vsn_verbose)sed -e 's;%VSN%;$(VSN);' $< > $@
+
+docs:
+
+# ----------------------------------------------------
+# Release Target
+# ----------------------------------------------------
+include $(ERL_TOP)/make/otp_release_targets.mk
+
+release_spec: opt
+ $(INSTALL_DIR) "$(RELSYSDIR)/src"
+ $(INSTALL_DATA) $(ERL_FILES) $(HRL_FILES) "$(RELSYSDIR)/src"
+ $(INSTALL_DIR) "$(RELSYSDIR)/ebin"
+ $(INSTALL_DATA) $(BEHAVIOUR_TARGET_FILES) $(TARGET_FILES) $(APP_TARGET) \
+ $(APPUP_TARGET) "$(RELSYSDIR)/ebin"
+
+release_docs_spec:
+
+info:
+ @echo "APPLICATION = $(APPLICATION)"
+ @echo "ERL_COMPILE_FLAGS = $(ERL_COMPILE_FLAGS)"
diff --git a/lib/tftp/src/tftp.app.src b/lib/tftp/src/tftp.app.src
new file mode 100644
index 0000000000..3f008573e8
--- /dev/null
+++ b/lib/tftp/src/tftp.app.src
@@ -0,0 +1,22 @@
+{application, tftp,
+ [{description, "TFTP application"},
+ {vsn, "1.0.0"},
+ {registered, []},
+ {mod, { tftp_app, []}},
+ {applications,
+ [kernel,
+ stdlib
+ ]},
+ {env,[]},
+ {modules, [
+ tftp,
+ tftp_app,
+ tftp_binary,
+ tftp_engine,
+ tftp_file,
+ tftp_lib,
+ tftp_logger,
+ tftp_sup
+ ]},
+ {runtime_dependencies, ["stdlib-3.5","kernel-6.0"]}
+ ]}.
diff --git a/lib/tftp/src/tftp.appup.src b/lib/tftp/src/tftp.appup.src
new file mode 100644
index 0000000000..06a0f0f9dc
--- /dev/null
+++ b/lib/tftp/src/tftp.appup.src
@@ -0,0 +1,26 @@
+%% -*- erlang -*-
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1999-2018. 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%
+{"%VSN%",
+ [
+ {<<".*">>,[{restart_application, tftp}]}
+ ],
+ [
+ {<<".*">>,[{restart_application, tftp}]}
+ ]
+}.
diff --git a/lib/tftp/src/tftp.erl b/lib/tftp/src/tftp.erl
new file mode 100644
index 0000000000..27ed13694b
--- /dev/null
+++ b/lib/tftp/src/tftp.erl
@@ -0,0 +1,409 @@
+%%
+%% %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 : tftp.erl
+%%% Author : Hakan Mattsson <[email protected]>
+%%% Description : Trivial FTP
+%%% Created : 18 May 2004 by Hakan Mattsson <[email protected]>
+%%%-------------------------------------------------------------------
+%%%
+%%% This is a complete implementation of the following IETF standards:
+%%%
+%%% RFC 1350, The TFTP Protocol (revision 2).
+%%% RFC 2347, TFTP Option Extension.
+%%% RFC 2348, TFTP Blocksize Option.
+%%% RFC 2349, TFTP Timeout Interval and Transfer Size Options.
+%%%
+%%% The only feature that not is implemented in this release is
+%%% the "netascii" transfer mode.
+%%%
+%%% The start/1 function starts a daemon process which, listens for
+%%% UDP packets on a port. When it receives a request for read or
+%%% write it spawns a temporary server process which handles the
+%%% actual transfer of the file. On the client side the read_file/3
+%%% and write_file/3 functions spawns a temporary client process which
+%%% establishes contact with a TFTP daemon and performs the actual
+%%% transfer of the file.
+%%%
+%%% Most of the options are common for both the client and the server
+%%% side, but some of them differs a little. Here are the available
+%%% options:
+%%%
+%%% {debug, Level}
+%%%
+%%% Level = none | error | warning brief | normal | verbose | all
+%%%
+%%% Controls the level of debug printouts. The default is none.
+%%%
+%%% {host, Host}
+%%%
+%%% The name or IP address of the host where the TFTP daemon
+%%% resides. This option is only used by the client. See
+%%% 'inet' about valid host names.
+%%%
+%%% {port, Port}
+%%%
+%%% Port = integer()
+%%%
+%%% The TFTP port where the daemon listens. It defaults to the
+%%% standardized number 69. On the server side it may sometimes
+%%% make sense to set it to 0, which means that the daemon just
+%%% will pick a free port (which is returned by the start/1
+%%% function).
+%%%
+%%% If a socket has somehow already has been connected, the
+%%% {udp, [{fd, integer()}]} option can be used to pass the
+%%% open file descriptor to gen_udp. This can be automated
+%%% a bit by using a command line argument stating the
+%%% prebound file descriptor number. For example, if the
+%%% Port is 69 and the file descriptor 22 has been opened by
+%%% setuid_socket_wrap. Then the command line argument
+%%% "-tftpd_69 22" will trigger the prebound file
+%%% descriptor 22 to be used instead of opening port 69.
+%%% The UDP option {udp, [{fd, 22}]} autmatically be added.
+%%% See init:get_argument/ about command line arguments and
+%%% gen_udp:open/2 about UDP options.
+%%%
+%%% {port_policy, Policy}
+%%%
+%%% Policy = random | Port | {range, MinPort, MaxPort}
+%%% Port = MinPort = MaxPort = integer()
+%%%
+%%% Policy for the selection of the temporary port which is used
+%%% by the server/client during the file transfer. It defaults to
+%%% 'random' which is the standardized policy. With this policy a
+%%% randomized free port used. A single port or a range of ports
+%%% can be useful if the protocol should pass thru a firewall.
+%%%
+%%% {prebound_fd, InitArgFlag}
+%%%
+%%% InitArgFlag = atom()
+%%%
+%%% If a socket has somehow already has been connected, the
+%%% {udp, [{fd, integer()}]} option can be used to pass the
+%%% open file descriptor to gen_udp.
+%%%
+%%% The prebound_fd option makes it possible to pass give the
+%%% file descriptor as a command line argument. The typical
+%%% usage is when used in conjunction with setuid_socket_wrap
+%%% to be able to open privileged sockets. For example if the
+%%% file descriptor 22 has been opened by setuid_socket_wrap
+%%% and you have choosen my_tftp_fd as init argument, the
+%%% command line should like this "erl -my_tftp_fd 22" and
+%%% FileDesc should be set to my_tftpd_fd. This would
+%%% automatically imply {fd, 22} to be set as UDP option.
+%%%
+%%% {udp, UdpOptions}
+%%%
+%%% Options to gen_udp:open/2.
+%%%
+%%% {use_tsize, Bool}
+%%%
+%%% Bool = boolean()
+%%%
+%%% Flag for automated usage of the "tsize" option. With this set
+%%% to true, the write_file/3 client will determine the filesize
+%%% and send it to the server as the standardized "tsize" option.
+%%% A read_file/3 client will just acquire filesize from the
+%%% server by sending a zero "tsize".
+%%%
+%%% {max_tsize, MaxTsize}
+%%%
+%%% MaxTsize = integer() | infinity
+%%%
+%%% Threshold for the maximal filesize in bytes. The transfer will
+%%% be aborted if the limit is exceeded. It defaults to
+%%% 'infinity'.
+%%%
+%%% {max_conn, MaxConn}
+%%%
+%%% MaxConn = integer() | infinity
+%%%
+%%% Threshold for the maximal number of active connections. The
+%%% daemon will reject the setup of new connections if the limit
+%%% is exceeded. It defaults to 'infinity'.
+%%%
+%%% {TftpKey, TftpVal}
+%%%
+%%% TftpKey = string()
+%%% TftpVal = string()
+%%%
+%%% The name and value of a TFTP option.
+%%%
+%%% {reject, Feature}
+%%%
+%%% Feature = Mode | TftpKey
+%%% Mode = read | write
+%%% TftpKey = string()
+%%%
+%%% Control which features that should be rejected.
+%%% This is mostly useful for the server as it may restrict
+%%% usage of certain TFTP options or read/write access.
+%%%
+%%% {callback, {RegExp, Module, State}}
+%%%
+%%% RegExp = string()
+%%% Module = atom()
+%%% State = term()
+%%%
+%%% Registration of a callback module. When a file is to be
+%%% transferred, its local filename will be matched to the
+%%% regular expressions of the registered callbacks. The first
+%%% matching callback will be used the during the transfer.The
+%%% callback module must implement the 'tftp' behaviour.
+%%%
+%%% On the server side the callback interaction starts with a
+%%% call to open/5 with the registered initial callback
+%%% state. open/5 is expected to open the (virtual) file. Then
+%%% either the read/1 or write/2 functions are invoked
+%%% repeatedly, once per transfererred block. At each function
+%%% call the state returned from the previous call is
+%%% obtained. When the last block has been encountered the read/1
+%%% or write/2 functions is expected to close the (virtual)
+%%% file.and return its last state. The abort/3 function is only
+%%% used in error situations. prepare/5 is not used on the server
+%%% side.
+%%%
+%%% On the client side the callback interaction is the same, but
+%%% it starts and ends a bit differently. It starts with a call
+%%% to prepare/5 with the same arguments as open/5
+%%% takes. prepare/5 is expected to validate the TFTP options,
+%%% suggested by the user and return the subset of them that it
+%%% accepts. Then the options is sent to the server which will
+%%% perform the same TFTP option negotiation procedure. The
+%%% options that are accepted by the server is forwarded to the
+%%% open/5 function on the client side. On the client side the
+%%% open/5 function must accept all option as is or reject the
+%%% transfer. Then the callback interaction follows the same
+%%% pattern as described above for the server side. When the last
+%%% block is encountered in read/1 or write/2 the returned stated
+%%% is forwarded to the user and returned from read_file/3 or
+%%% write_file/3.
+%%%-------------------------------------------------------------------
+
+-module(tftp).
+
+%%-------------------------------------------------------------------
+%% Interface
+%%-------------------------------------------------------------------
+
+%% Public functions
+-export([
+ read_file/3,
+ write_file/3,
+ start/1,
+ info/1,
+ change_config/2,
+ start/0,
+ stop/0
+ ]).
+
+%% Application local functions
+-export([
+ start_standalone/1,
+ start_service/1,
+ stop_service/1,
+ services/0,
+ service_info/1
+ ]).
+
+
+-type peer() :: {PeerType :: inet | inet6,
+ PeerHost :: inet:ip_address(),
+ PeerPort :: port()}.
+
+-type access() :: read | write.
+
+-type options() :: [{Key :: string(), Value :: string()}].
+
+-type error_code() :: undef | enoent | eacces | enospc |
+ badop | eexist | baduser | badopt |
+ integer().
+
+-callback prepare(Peer :: peer(),
+ Access :: access(),
+ Filename :: file:name(),
+ Mode :: string(),
+ SuggestedOptions :: options(),
+ InitialState :: [] | [{root_dir, string()}]) ->
+ {ok, AcceptedOptions :: options(), NewState :: term()} |
+ {error, {Code :: error_code(), string()}}.
+
+-callback open(Peer :: peer(),
+ Access :: access(),
+ Filename :: file:name(),
+ Mode :: string(),
+ SuggestedOptions :: options(),
+ State :: [] | [{root_dir, string()}] | term()) ->
+ {ok, AcceptedOptions :: options(), NewState :: term()} |
+ {error, {Code :: error_code(), string()}}.
+
+-callback read(State :: term()) -> {more, binary(), NewState :: term()} |
+ {last, binary(), integer()} |
+ {error, {Code :: error_code(), string()}}.
+
+-callback write(binary(), State :: term()) ->
+ {more, NewState :: term()} |
+ {last, FileSize :: integer()} |
+ {error, {Code :: error_code(), string()}}.
+
+-callback abort(Code :: error_code(), string(), State :: term()) -> 'ok'.
+
+-include("tftp.hrl").
+
+
+%%-------------------------------------------------------------------
+%% read_file(RemoteFilename, LocalFilename, Options) ->
+%% {ok, LastCallbackState} | {error, Reason}
+%%
+%% RemoteFilename = string()
+%% LocalFilename = binary | string()
+%% Options = [option()]
+%% LastCallbackState = term()
+%% Reason = term()
+%%
+%% Reads a (virtual) file from a TFTP server
+%%
+%% If LocalFilename is the atom 'binary', tftp_binary will be used as
+%% callback module. It will concatenate all transferred blocks and
+%% return them as one single binary in the CallbackState.
+%%
+%% When LocalFilename is a string, it will be matched to the
+%% registered callback modules and hopefully one of them will be
+%% selected. By default, tftp_file will be used as callback module. It
+%% will write each transferred block to the file named
+%% LocalFilename. The number of transferred bytes will be returned as
+%% LastCallbackState.
+%%-------------------------------------------------------------------
+
+read_file(RemoteFilename, LocalFilename, Options) ->
+ tftp_engine:client_start(read, RemoteFilename, LocalFilename, Options).
+
+%%-------------------------------------------------------------------
+%% write(RemoteFilename, LocalFilename, Options) ->
+%% {ok, LastCallbackState} | {error, Reason}
+%%
+%% RemoteFilename = string()
+%% LocalFilename = binary() | string()
+%% Options = [option()]
+%% LastCallbackState = term()
+%% Reason = term()
+%%
+%% Writes a (virtual) file to a TFTP server
+%%
+%% If LocalFilename is a binary, tftp_binary will be used as callback
+%% module. The binary will be transferred block by block and the number
+%% of transferred bytes will be returned as LastCallbackState.
+%%
+%% When LocalFilename is a string, it will be matched to the
+%% registered callback modules and hopefully one of them will be
+%% selected. By default, tftp_file will be used as callback module. It
+%% will read the file named LocalFilename block by block. The number
+%% of transferred bytes will be returned as LastCallbackState.
+%%-------------------------------------------------------------------
+
+write_file(RemoteFilename, LocalFilename, Options) ->
+ tftp_engine:client_start(write, RemoteFilename, LocalFilename, Options).
+
+%%-------------------------------------------------------------------
+%% start(Options) -> {ok, Pid} | {error, Reason}
+%%
+%% Options = [option()]
+%% Pid = pid()
+%% Reason = term()
+%%
+%% Starts a daemon process which listens for udp packets on a
+%% port. When it receives a request for read or write it spawns
+%% a temporary server process which handles the actual transfer
+%% of the (virtual) file.
+%%-------------------------------------------------------------------
+
+start(Options) ->
+ tftp_engine:daemon_start(Options).
+
+%%-------------------------------------------------------------------
+%% info(Pid) -> {ok, Options} | {error, Reason}
+%%
+%% Options = [option()]
+%% Reason = term()
+%%
+%% Returns info about a tftp daemon, server or client process
+%%-------------------------------------------------------------------
+
+info(Pid) ->
+ tftp_engine:info(Pid).
+
+%%-------------------------------------------------------------------
+%% change_config(Pid, Options) -> ok | {error, Reason}
+%%
+%% Options = [option()]
+%% Reason = term()
+%%
+%% Changes config for a tftp daemon, server or client process
+%% Must be used with care.
+%%-------------------------------------------------------------------
+
+change_config(Pid, Options) ->
+ tftp_engine:change_config(Pid, Options).
+
+%%-------------------------------------------------------------------
+%% start() -> ok | {error, Reason}
+%%
+%% Reason = term()
+%%
+%% Start the application
+%%-------------------------------------------------------------------
+
+start() ->
+ application:start(tftp).
+
+%%-------------------------------------------------------------------
+%% stop() -> ok | {error, Reason}
+%%
+%% Reason = term()
+%%
+%% Stop the application
+%%-------------------------------------------------------------------
+stop() ->
+ application:stop(tftp).
+
+%%-------------------------------------------------------------------
+%% Inets service behavior
+%%-------------------------------------------------------------------
+
+start_standalone(Options) ->
+ start(Options).
+
+start_service(Options) ->
+ tftp_sup:start_child(Options).
+
+stop_service(Pid) ->
+ tftp_sup:stop_child(Pid).
+
+services() ->
+ tftp_sup:which_children().
+
+service_info(Pid) ->
+ info(Pid).
+
+
+
diff --git a/lib/tftp/src/tftp.hrl b/lib/tftp/src/tftp.hrl
new file mode 100644
index 0000000000..25543e0b9e
--- /dev/null
+++ b/lib/tftp/src/tftp.hrl
@@ -0,0 +1,69 @@
+%%
+%% %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%
+%%
+%%
+
+%%%-------------------------------------------------------------------
+%%% Defines
+%%%-------------------------------------------------------------------
+
+-define(TFTP_DEFAULT_PORT, 69).% Default server port
+
+-define(TFTP_OPCODE_RRQ, 1). % Read request
+-define(TFTP_OPCODE_WRQ, 2). % Write request
+-define(TFTP_OPCODE_DATA, 3). % Data
+-define(TFTP_OPCODE_ACK, 4). % Acknowledgement
+-define(TFTP_OPCODE_ERROR, 5). % Error
+-define(TFTP_OPCODE_OACK, 6). % Option acknowledgment
+
+-define(TFTP_ERROR_UNDEF, 0). % Not defined, see error message (if any)
+-define(TFTP_ERROR_ENOENT, 1). % File not found.
+-define(TFTP_ERROR_EACCES, 2). % Access violation.
+-define(TFTP_ERROR_ENOSPC, 3). % Disk full or allocation exceeded.
+-define(TFTP_ERROR_BADOP, 4). % Illegal TFTP operation.
+-define(TFTP_ERROR_BADBLK, 5). % Unknown transfer ID.
+-define(TFTP_ERROR_EEXIST, 6). % File already exists.
+-define(TFTP_ERROR_BADUSER, 7). % No such user.
+-define(TFTP_ERROR_BADOPT, 8). % Unrequested or illegal option.
+
+-record(tftp_msg_req, {access, filename, mode, options, local_filename}).
+-record(tftp_msg_data, {block_no, data}).
+-record(tftp_msg_ack, {block_no}).
+-record(tftp_msg_error, {code, text, details}).
+-record(tftp_msg_oack, {options}).
+
+-record(config, {parent_pid = self(),
+ udp_socket,
+ udp_options = [binary, {reuseaddr, true}, {active, once}],
+ udp_host = "localhost",
+ udp_port = ?TFTP_DEFAULT_PORT,
+ port_policy = random,
+ use_tsize = false,
+ max_tsize = infinity, % Filesize
+ max_conn = infinity,
+ rejected = [],
+ polite_ack = false,
+ debug_level = none,
+ timeout,
+ user_options = [],
+ callbacks = [],
+ logger = tftp_logger,
+ max_retries = 5}).
+
+-record(callback, {regexp, internal, module, state, block_no, count}).
diff --git a/lib/tftp/src/tftp_app.erl b/lib/tftp/src/tftp_app.erl
new file mode 100644
index 0000000000..bbcd107e30
--- /dev/null
+++ b/lib/tftp/src/tftp_app.erl
@@ -0,0 +1,47 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2002-2018. 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%
+%%
+%%
+
+%%%-------------------------------------------------------------------
+%% @doc ftp public API
+%% @end
+%%%-------------------------------------------------------------------
+
+-module(tftp_app).
+
+-behaviour(application).
+
+%% Application callbacks
+-export([start/2, stop/1]).
+
+%%====================================================================
+%% API
+%%====================================================================
+
+start(_StartType, _StartArgs) ->
+ tftp_sup:start_link([]).
+
+%%--------------------------------------------------------------------
+stop(_State) ->
+ ok.
+
+%%====================================================================
+%% Internal functions
+%%====================================================================
diff --git a/lib/tftp/src/tftp_binary.erl b/lib/tftp/src/tftp_binary.erl
new file mode 100644
index 0000000000..09adcfc41f
--- /dev/null
+++ b/lib/tftp/src/tftp_binary.erl
@@ -0,0 +1,239 @@
+%%
+%% %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}.
diff --git a/lib/tftp/src/tftp_engine.erl b/lib/tftp/src/tftp_engine.erl
new file mode 100644
index 0000000000..fb2c9749e5
--- /dev/null
+++ b/lib/tftp/src/tftp_engine.erl
@@ -0,0 +1,1422 @@
+%%
+%% %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%
+%%
+%%-------------------------------------------------------------------
+%% Protocol engine for trivial FTP
+%%-------------------------------------------------------------------
+
+-module(tftp_engine).
+
+%%%-------------------------------------------------------------------
+%%% Interface
+%%%-------------------------------------------------------------------
+
+%% application internal functions
+-export([
+ daemon_start/1,
+ daemon_loop/1,
+ daemon_loop/3, %% Handle upgrade from old releases. Please, remove this function in next release.
+ client_start/4,
+ common_loop/6,
+ info/1,
+ change_config/2
+ ]).
+
+%% module internal
+-export([
+ daemon_init/1,
+ server_init/2,
+ client_init/2,
+ wait_for_msg/3,
+ callback/4
+ ]).
+
+%% sys callback functions
+-export([
+ system_continue/3,
+ system_terminate/4,
+ system_code_change/4
+ ]).
+
+-include("tftp.hrl").
+
+-type prep_status() :: 'error' | 'last' | 'more' | 'terminate'.
+
+-record(daemon_state, {config, n_servers, server_tab, file_tab}).
+-record(server_info, {pid, req, peer}).
+-record(file_info, {peer_req, pid}).
+-record(sys_misc, {module, function, arguments}).
+-record(error, {where, code, text, filename}).
+-record(prepared, {status :: prep_status() | 'undefined',
+ result, block_no, next_data, prev_data}).
+-record(transfer_res, {status, decoded_msg, prepared}).
+-define(ERROR(Where, Code, Text, Filename),
+ #error{where = Where, code = Code, text = Text, filename = Filename}).
+
+%%%-------------------------------------------------------------------
+%%% Info
+%%%-------------------------------------------------------------------
+
+info(daemons) ->
+ Daemons = supervisor:which_children(tftp_sup),
+ [{Pid, info(Pid)} || {_, Pid, _, _} <- Daemons];
+info(servers) ->
+ [{Pid, info(Pid)} || {_, {ok, DeamonInfo}} <- info(daemons),
+ {server, Pid} <- DeamonInfo];
+info(ToPid) when is_pid(ToPid) ->
+ call(info, ToPid, timer:seconds(10)).
+
+change_config(daemons, Options) ->
+ Daemons = supervisor:which_children(tftp_sup),
+ [{Pid, change_config(Pid, Options)} || {_, Pid, _, _} <- Daemons];
+change_config(servers, Options) ->
+ [{Pid, change_config(Pid, Options)} || {_, {ok, DeamonInfo}} <- info(daemons),
+ {server, Pid} <- DeamonInfo];
+change_config(ToPid, Options) when is_pid(ToPid) ->
+ BadKeys = [host, port, udp],
+ BadOptions = [{Key, Val} || {Key, Val} <- Options,
+ BadKey <- BadKeys,
+ Key =:= BadKey],
+ case BadOptions of
+ [] ->
+ call({change_config, Options}, ToPid, timer:seconds(10));
+ [{Key, Val} | _] ->
+ {error, {badarg, {Key, Val}}}
+ end.
+
+call(Req, ToPid, Timeout) when is_pid(ToPid) ->
+ Type = process,
+ Ref = erlang:monitor(Type, ToPid),
+ ToPid ! {Req, Ref, self()},
+ receive
+ {Reply, Ref, FromPid} when FromPid =:= ToPid ->
+ erlang:demonitor(Ref, [flush]),
+ Reply;
+ {'DOWN', Ref, Type, FromPid, _Reason} when FromPid =:= ToPid ->
+ {error, timeout}
+ after Timeout ->
+ {error, timeout}
+ end.
+
+reply(Reply, Ref, ToPid) ->
+ ToPid ! {Reply, Ref, self()}.
+
+%%%-------------------------------------------------------------------
+%%% Daemon
+%%%-------------------------------------------------------------------
+
+%% Returns {ok, Port}
+daemon_start(Options) when is_list(Options) ->
+ Config = tftp_lib:parse_config(Options),
+ proc_lib:start_link(?MODULE, daemon_init, [Config], infinity).
+
+daemon_init(Config) when is_record(Config, config),
+ is_pid(Config#config.parent_pid) ->
+ process_flag(trap_exit, true),
+ {Port, UdpOptions} = prepare_daemon_udp(Config),
+ case catch gen_udp:open(Port, UdpOptions) of
+ {ok, Socket} ->
+ {ok, ActualPort} = inet:port(Socket),
+ proc_lib:init_ack({ok, self()}),
+ Config2 = Config#config{udp_socket = Socket,
+ udp_port = ActualPort},
+ print_debug_info(Config2, daemon, open, #tftp_msg_req{filename = ""}),
+ ServerTab = ets:new(tftp_daemon_servers, [{keypos, 2}]),
+ FileTab = ets:new(tftp_daemon_files, [{keypos, 2}]),
+ State = #daemon_state{config = Config2,
+ n_servers = 0,
+ server_tab = ServerTab,
+ file_tab = FileTab},
+ daemon_loop(State);
+ {error, Reason} ->
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [UdpOptions, Reason])),
+ print_debug_info(Config, daemon, open, ?ERROR(open, undef, Text, "")),
+ exit({gen_udp_open, UdpOptions, Reason});
+ Reason ->
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [UdpOptions, Reason])),
+ print_debug_info(Config, daemon, open, ?ERROR(open, undef, Text, "")),
+ exit({gen_udp_open, UdpOptions, Reason})
+ end.
+
+prepare_daemon_udp(#config{udp_port = Port, udp_options = UdpOptions} = Config) ->
+ case lists:keymember(fd, 1, UdpOptions) of
+ true ->
+ %% Use explicit fd
+ {Port, UdpOptions};
+ false ->
+ %% Use fd from setuid_socket_wrap, such as -tftpd_69
+ InitArg = list_to_atom("tftpd_" ++ integer_to_list(Port)),
+ case init:get_argument(InitArg) of
+ {ok, [[FdStr]] = Badarg} when is_list(FdStr) ->
+ case catch list_to_integer(FdStr) of
+ Fd when is_integer(Fd) ->
+ {0, [{fd, Fd} | lists:keydelete(ip, 1, UdpOptions)]};
+ {'EXIT', _} ->
+ Text = lists:flatten(io_lib:format("Illegal prebound fd ~p: ~p", [InitArg, Badarg])),
+ print_debug_info(Config, daemon, open, ?ERROR(open, undef, Text, "")),
+ exit({badarg, {prebound_fd, InitArg, Badarg}})
+ end;
+ {ok, Badarg} ->
+ Text = lists:flatten(io_lib:format("Illegal prebound fd ~p: ~p", [InitArg, Badarg])),
+ print_debug_info(Config, daemon, open, ?ERROR(open, undef, Text, "")),
+ exit({badarg, {prebound_fd, InitArg, Badarg}});
+ error ->
+ {Port, UdpOptions}
+ end
+ end.
+
+daemon_loop(DaemonConfig, N, Servers) when is_list(Servers) ->
+ %% Handle upgrade from old releases. Please, remove this function in next release.
+ ServerTab = ets:new(tftp_daemon_servers, [{keypos, 2}]),
+ FileTab = ets:new(tftp_daemon_files, [{keypos, 2}]),
+ State = #daemon_state{config = DaemonConfig,
+ n_servers = N,
+ server_tab = ServerTab,
+ file_tab = FileTab},
+ Req = #tftp_msg_req{filename = dummy},
+ [ets:insert(ServerTab, #server_info{pid = Pid, req = Req, peer = dummy}) || Pid <- Servers],
+ daemon_loop(State).
+
+daemon_loop(#daemon_state{config = DaemonConfig,
+ n_servers = N,
+ server_tab = ServerTab,
+ file_tab = FileTab} = State) when is_record(DaemonConfig, config) ->
+ %% info_msg(DaemonConfig, "=====> TFTP: Daemon #~p\n", [N]), %% XXX
+ receive
+ {info, Ref, FromPid} when is_pid(FromPid) ->
+ Fun = fun(#server_info{pid = Pid}, Acc) -> [{server, Pid} | Acc] end,
+ ServerInfo = ets:foldl(Fun, [], ServerTab),
+ Info = internal_info(DaemonConfig, daemon) ++ [{n_conn, N}] ++ ServerInfo,
+ reply({ok, Info}, Ref, FromPid),
+ ?MODULE:daemon_loop(State);
+ {{change_config, Options}, Ref, FromPid} when is_pid(FromPid) ->
+ case catch tftp_lib:parse_config(Options, DaemonConfig) of
+ {'EXIT', Reason} ->
+ reply({error, Reason}, Ref, FromPid),
+ ?MODULE:daemon_loop(State);
+ DaemonConfig2 when is_record(DaemonConfig2, config) ->
+ reply(ok, Ref, FromPid),
+ ?MODULE:daemon_loop(State#daemon_state{config = DaemonConfig2})
+ end;
+ {udp, Socket, RemoteHost, RemotePort, Bin} when is_binary(Bin) ->
+ inet:setopts(Socket, [{active, once}]),
+ ServerConfig = DaemonConfig#config{parent_pid = self(),
+ udp_host = RemoteHost,
+ udp_port = RemotePort},
+ Msg = (catch tftp_lib:decode_msg(Bin)),
+ print_debug_info(ServerConfig, daemon, recv, Msg),
+ case Msg of
+ Req when is_record(Req, tftp_msg_req),
+ N =< DaemonConfig#config.max_conn ->
+ Peer = peer_info(ServerConfig),
+ PeerReq = {Peer, Req},
+ PeerInfo = lists:flatten(io_lib:format("~p", [Peer])),
+ case ets:lookup(FileTab, PeerReq) of
+ [] ->
+ Args = [ServerConfig, Req],
+ Pid = proc_lib:spawn_link(?MODULE, server_init, Args),
+ ets:insert(ServerTab, #server_info{pid = Pid, req = Req, peer = Peer}),
+ ets:insert(FileTab, #file_info{peer_req = PeerReq, pid = Pid}),
+ ?MODULE:daemon_loop(State#daemon_state{n_servers = N + 1});
+ [#file_info{pid = Pid}] ->
+ %% Yet another request of the file from same peer
+ warning_msg(DaemonConfig, "~p Reuse connection for ~s\n\t~p\n",
+ [Pid, PeerInfo, Req#tftp_msg_req.filename]),
+ ?MODULE:daemon_loop(State)
+ end;
+ Req when is_record(Req, tftp_msg_req) ->
+ Reply = #tftp_msg_error{code = enospc, text = "Too many connections"},
+ Peer = peer_info(ServerConfig),
+ PeerInfo = lists:flatten(io_lib:format("~p", [Peer])),
+ warning_msg(DaemonConfig,
+ "Daemon has too many connections (~p)."
+ "\n\tRejecting request from ~s\n",
+ [N, PeerInfo]),
+ send_msg(ServerConfig, daemon, Reply),
+ ?MODULE:daemon_loop(State);
+ {'EXIT', Reply} when is_record(Reply, tftp_msg_error) ->
+ send_msg(ServerConfig, daemon, Reply),
+ ?MODULE:daemon_loop(State);
+ Req ->
+ Reply = #tftp_msg_error{code = badop,
+ text = "Illegal TFTP operation"},
+ warning_msg(DaemonConfig, "Daemon received: ~p.\n\tfrom ~p:~p",
+ [Req, RemoteHost, RemotePort]),
+ send_msg(ServerConfig, daemon, Reply),
+ ?MODULE:daemon_loop(State)
+ end;
+ {system, From, Msg} ->
+ Misc = #sys_misc{module = ?MODULE, function = daemon_loop, arguments = [State]},
+ sys:handle_system_msg(Msg, From, DaemonConfig#config.parent_pid, ?MODULE, [], Misc);
+ {'EXIT', Pid, Reason} when DaemonConfig#config.parent_pid =:= Pid ->
+ close_port(DaemonConfig, daemon, #tftp_msg_req{filename = ""}),
+ exit(Reason);
+ {'EXIT', Pid, _Reason} = Info ->
+ case ets:lookup(ServerTab, Pid) of
+ [] ->
+ warning_msg(DaemonConfig, "Daemon received: ~p", [Info]),
+ ?MODULE:daemon_loop(State);
+ [#server_info{req = Req, peer = Peer}] ->
+ PeerReq = {Peer, Req},
+ ets:delete(FileTab, PeerReq),
+ ets:delete(ServerTab, Pid),
+ ?MODULE:daemon_loop(State#daemon_state{n_servers = N - 1})
+ end;
+ Info ->
+ warning_msg(DaemonConfig, "Daemon received: ~p", [Info]),
+ ?MODULE:daemon_loop(State)
+ end;
+daemon_loop(#daemon_state{config = Config} = State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ Config2 = upgrade_config(Config),
+ daemon_loop(State#daemon_state{config = Config2}).
+
+upgrade_config({config, ParentPid, UdpSocket, UdpOptions, UdpHost, UdpPort, PortPolicy,
+ UseTsize, MaxTsize, MaxConn, Rejected, PoliteAck, DebugLevel,
+ Timeout, UserOptions, Callbacks}) ->
+ Callbacks2 = tftp_lib:add_default_callbacks(Callbacks),
+ Logger = tftp_logger,
+ MaxRetries = 5,
+ {config, ParentPid, UdpSocket, UdpOptions, UdpHost, UdpPort, PortPolicy,
+ UseTsize, MaxTsize, MaxConn, Rejected, PoliteAck, DebugLevel,
+ Timeout, UserOptions, Callbacks2, Logger, MaxRetries}.
+
+%%%-------------------------------------------------------------------
+%%% Server
+%%%-------------------------------------------------------------------
+
+server_init(Config, Req) when is_record(Config, config),
+ is_pid(Config#config.parent_pid),
+ is_record(Req, tftp_msg_req) ->
+ process_flag(trap_exit, true),
+ %% Config =
+ %% case os:getenv("TFTPDEBUG") of
+ %% false ->
+ %% Config0;
+ %% DebugLevel ->
+ %% Config0#config{debug_level = list_to_atom(DebugLevel)}
+ %% end,
+ SuggestedOptions = Req#tftp_msg_req.options,
+ UdpOptions = Config#config.udp_options,
+ UdpOptions2 = lists:keydelete(fd, 1, UdpOptions),
+ Config1 = Config#config{udp_options = UdpOptions2},
+ Config2 = tftp_lib:parse_config(SuggestedOptions, Config1),
+ SuggestedOptions2 = Config2#config.user_options,
+ Req2 = Req#tftp_msg_req{options = SuggestedOptions2},
+ case open_free_port(Config2, server, Req2) of
+ {ok, Config3} ->
+ Filename = Req#tftp_msg_req.filename,
+ case match_callback(Filename, Config3#config.callbacks) of
+ {ok, Callback} ->
+ print_debug_info(Config3, server, match, Callback),
+ case pre_verify_options(Config3, Req2) of
+ ok ->
+ case callback({open, server_open}, Config3, Callback, Req2) of
+ {Callback2, {ok, AcceptedOptions}} ->
+ {LocalAccess, _} = local_file_access(Req2),
+ OptText = "Internal error. Not allowed to add new options.",
+ case post_verify_options(Config3, Req2, AcceptedOptions, OptText) of
+ {ok, Config4, Req3} when AcceptedOptions =/= [] ->
+ Reply = #tftp_msg_oack{options = AcceptedOptions},
+ BlockNo =
+ case LocalAccess of
+ read -> 0;
+ write -> 1
+ end,
+ {Config5, Callback3, TransferRes} =
+ transfer(Config4, Callback2, Req3, Reply, LocalAccess, BlockNo, #prepared{}),
+ common_loop(Config5, Callback3, Req3, TransferRes, LocalAccess, BlockNo);
+ {ok, Config4, Req3} when LocalAccess =:= write ->
+ BlockNo = 0,
+ common_ack(Config4, Callback2, Req3, LocalAccess, BlockNo, #prepared{});
+ {ok, Config4, Req3} when LocalAccess =:= read ->
+ BlockNo = 0,
+ common_read(Config4, Callback2, Req3, LocalAccess, BlockNo, BlockNo, #prepared{});
+ {error, {Code, Text}} ->
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config3, Callback2, Req2),
+ send_msg(Config3, Req, Error),
+ terminate(Config3, Req2, ?ERROR(post_verify_options, Code, Text, Req2#tftp_msg_req.filename))
+ end;
+ {undefined, #tftp_msg_error{code = Code, text = Text} = Error} ->
+ send_msg(Config3, Req, Error),
+ terminate(Config3, Req, ?ERROR(server_open, Code, Text, Req2#tftp_msg_req.filename))
+ end;
+ {error, {Code, Text}} ->
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config2, Callback, Req2),
+ send_msg(Config2, Req, Error),
+ terminate(Config2, Req2, ?ERROR(pre_verify_options, Code, Text, Req2#tftp_msg_req.filename))
+ end;
+ {error, #tftp_msg_error{code = Code, text = Text} = Error} ->
+ send_msg(Config3, Req, Error),
+ terminate(Config3, Req, ?ERROR(match_callback, Code, Text, Req2#tftp_msg_req.filename))
+ end;
+ #error{} = Error ->
+ terminate(Config2, Req, Error)
+ end;
+server_init(Config, Req) when is_record(Req, tftp_msg_req) ->
+ Config2 = upgrade_config(Config),
+ server_init(Config2, Req).
+
+%%%-------------------------------------------------------------------
+%%% Client
+%%%-------------------------------------------------------------------
+
+%% LocalFilename = filename() | 'binary' | binary()
+%% Returns {ok, LastCallbackState} | {error, Reason}
+client_start(Access, RemoteFilename, LocalFilename, Options) ->
+ Config = tftp_lib:parse_config(Options),
+ Config2 = Config#config{parent_pid = self(),
+ udp_socket = undefined},
+ Req = #tftp_msg_req{access = Access,
+ filename = RemoteFilename,
+ mode = lookup_mode(Config2#config.user_options),
+ options = Config2#config.user_options,
+ local_filename = LocalFilename},
+ Args = [Config2, Req],
+ case proc_lib:start_link(?MODULE, client_init, Args, infinity) of
+ {ok, LastCallbackState} ->
+ {ok, LastCallbackState};
+ {error, Error} ->
+ {error, Error}
+ end.
+
+client_init(Config, Req) when is_record(Config, config),
+ is_pid(Config#config.parent_pid),
+ is_record(Req, tftp_msg_req) ->
+ process_flag(trap_exit, true),
+ %% Config =
+ %% case os:getenv("TFTPDEBUG") of
+ %% false ->
+ %% Config0;
+ %% "none" ->
+ %% Config0;
+ %% DebugLevel ->
+ %% info_msg(Config, "TFTPDEBUG: ~s\n", [DebugLevel]),
+ %% Config0#config{debug_level = list_to_atom(DebugLevel)}
+ %% end,
+ case open_free_port(Config, client, Req) of
+ {ok, Config2} ->
+ Req2 =
+ case Config2#config.use_tsize of
+ true ->
+ SuggestedOptions = Req#tftp_msg_req.options,
+ SuggestedOptions2 = tftp_lib:replace_val("tsize", "0", SuggestedOptions),
+ Req#tftp_msg_req{options = SuggestedOptions2};
+ false ->
+ Req
+ end,
+ LocalFilename = Req2#tftp_msg_req.local_filename,
+ case match_callback(LocalFilename, Config2#config.callbacks) of
+ {ok, Callback} ->
+ print_debug_info(Config2, client, match, Callback),
+ client_prepare(Config2, Callback, Req2);
+ {error, #tftp_msg_error{code = Code, text = Text}} ->
+ terminate(Config, Req, ?ERROR(match, Code, Text, Req#tftp_msg_req.filename))
+ end;
+ #error{} = Error ->
+ terminate(Config, Req, Error)
+ end.
+
+client_prepare(Config, Callback, Req) when is_record(Req, tftp_msg_req) ->
+ case pre_verify_options(Config, Req) of
+ ok ->
+ case callback({open, client_prepare}, Config, Callback, Req) of
+ {Callback2, {ok, AcceptedOptions}} ->
+ OptText = "Internal error. Not allowed to add new options.",
+ case post_verify_options(Config, Req, AcceptedOptions, OptText) of
+ {ok, Config2, Req2} ->
+ {LocalAccess, _} = local_file_access(Req2),
+ BlockNo = 0,
+ {Config3, Callback3, TransferRes} =
+ transfer(Config2, Callback2, Req2, Req2, LocalAccess, BlockNo, #prepared{}),
+ client_open(Config3, Callback3, Req2, BlockNo, TransferRes);
+ {error, {Code, Text}} ->
+ callback({abort, {Code, Text}}, Config, Callback2, Req),
+ terminate(Config, Req, ?ERROR(post_verify_options, Code, Text, Req#tftp_msg_req.filename))
+ end;
+ {undefined, #tftp_msg_error{code = Code, text = Text}} ->
+ terminate(Config, Req, ?ERROR(client_prepare, Code, Text, Req#tftp_msg_req.filename))
+ end;
+ {error, {Code, Text}} ->
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ terminate(Config, Req, ?ERROR(pre_verify_options, Code, Text, Req#tftp_msg_req.filename))
+ end.
+
+client_open(Config, Callback, Req, BlockNo, #transfer_res{status = Status, decoded_msg = DecodedMsg, prepared = Prepared}) ->
+ {LocalAccess, _} = local_file_access(Req),
+ case Status of
+ ok when is_record(Prepared, prepared) ->
+ case DecodedMsg of
+ Msg when is_record(Msg, tftp_msg_oack) ->
+ ServerOptions = Msg#tftp_msg_oack.options,
+ OptText = "Protocol violation. Server is not allowed new options",
+ case post_verify_options(Config, Req, ServerOptions, OptText) of
+ {ok, Config2, Req2} ->
+ {Config3, Callback2, Req3} =
+ do_client_open(Config2, Callback, Req2),
+ case LocalAccess of
+ read ->
+ common_read(Config3, Callback2, Req3, LocalAccess, BlockNo, BlockNo, Prepared);
+ write ->
+ common_ack(Config3, Callback2, Req3, LocalAccess, BlockNo, Prepared)
+ end;
+ {error, {Code, Text}} ->
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(verify_server_options, Code, Text, Req#tftp_msg_req.filename))
+ end;
+ #tftp_msg_ack{block_no = ActualBlockNo} when LocalAccess =:= read ->
+ Req2 = Req#tftp_msg_req{options = []},
+ {Config2, Callback2, Req2} = do_client_open(Config, Callback, Req2),
+ ExpectedBlockNo = 0,
+ common_read(Config2, Callback2, Req2, LocalAccess, ExpectedBlockNo, ActualBlockNo, Prepared);
+ #tftp_msg_data{block_no = ActualBlockNo, data = Data} when LocalAccess =:= write ->
+ Req2 = Req#tftp_msg_req{options = []},
+ {Config2, Callback2, Req2} = do_client_open(Config, Callback, Req2),
+ ExpectedBlockNo = 1,
+ common_write(Config2, Callback2, Req2, LocalAccess, ExpectedBlockNo, ActualBlockNo, Data, Prepared);
+ %% #tftp_msg_error{code = Code, text = Text} when Req#tftp_msg_req.options =/= [] ->
+ %% %% Retry without options
+ %% callback({abort, {Code, Text}}, Config, Callback, Req),
+ %% Req2 = Req#tftp_msg_req{options = []},
+ %% client_prepare(Config, Callback, Req2);
+ #tftp_msg_error{code = Code, text = Text} ->
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ terminate(Config, Req, ?ERROR(client_open, Code, Text, Req#tftp_msg_req.filename));
+ {'EXIT', #tftp_msg_error{code = Code, text = Text}} ->
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ terminate(Config, Req, ?ERROR(client_open, Code, Text, Req#tftp_msg_req.filename));
+ Msg when is_tuple(Msg) ->
+ Code = badop,
+ Text = "Illegal TFTP operation",
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ send_msg(Config, Req, Error),
+ Text2 = lists:flatten([Text, ". ", io_lib:format("~p", [element(1, Msg)])]),
+ terminate(Config, Req, ?ERROR(client_open, Code, Text2, Req#tftp_msg_req.filename))
+ end;
+ error when is_record(Prepared, tftp_msg_error) ->
+ #tftp_msg_error{code = Code, text = Text} = Prepared,
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ terminate(Config, Req, ?ERROR(client_open, Code, Text, Req#tftp_msg_req.filename))
+ end.
+
+do_client_open(Config, Callback, Req) ->
+ case callback({open, client_open}, Config, Callback, Req) of
+ {Callback2, {ok, FinalOptions}} ->
+ OptText = "Internal error. Not allowed to change options.",
+ case post_verify_options(Config, Req, FinalOptions, OptText) of
+ {ok, Config2, Req2} ->
+ {Config2, Callback2, Req2};
+ {error, {Code, Text}} ->
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config, Callback2, Req),
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(post_verify_options, Code, Text, Req#tftp_msg_req.filename))
+ end;
+ {undefined, #tftp_msg_error{code = Code, text = Text} = Error} ->
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(client_open, Code, Text, Req#tftp_msg_req.filename))
+ end.
+
+%%%-------------------------------------------------------------------
+%%% Common loop for both client and server
+%%%-------------------------------------------------------------------
+
+common_loop(Config, Callback, Req, #transfer_res{status = Status, decoded_msg = DecodedMsg, prepared = Prepared}, LocalAccess, ExpectedBlockNo)
+ when is_record(Config, config)->
+ %% Config =
+ %% case os:getenv("TFTPMAX") of
+ %% false ->
+ %% Config0;
+ %% MaxBlockNoStr when Config0#config.debug_level =/= none ->
+ %% case list_to_integer(MaxBlockNoStr) of
+ %% MaxBlockNo when ExpectedBlockNo > MaxBlockNo ->
+ %% info_msg(Config, "TFTPMAX: ~p\n", [MaxBlockNo]),
+ %% info_msg(Config, "TFTPDEBUG: none\n", []),
+ %% Config0#config{debug_level = none};
+ %% _ ->
+ %% Config0
+ %% end;
+ %% _MaxBlockNoStr ->
+ %% Config0
+ %% end,
+ case Status of
+ ok when is_record(Prepared, prepared) ->
+ case DecodedMsg of
+ #tftp_msg_ack{block_no = ActualBlockNo} when LocalAccess =:= read ->
+ common_read(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Prepared);
+ #tftp_msg_data{block_no = ActualBlockNo, data = Data} when LocalAccess =:= write ->
+ common_write(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Data, Prepared);
+ #tftp_msg_error{code = Code, text = Text} ->
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ terminate(Config, Req, ?ERROR(common_loop, Code, Text, Req#tftp_msg_req.filename));
+ {'EXIT', #tftp_msg_error{code = Code, text = Text} = Error} ->
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(common_loop, Code, Text, Req#tftp_msg_req.filename));
+ Msg when is_tuple(Msg) ->
+ Code = badop,
+ Text = "Illegal TFTP operation",
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ send_msg(Config, Req, Error),
+ Text2 = lists:flatten([Text, ". ", io_lib:format("~p", [element(1, Msg)])]),
+ terminate(Config, Req, ?ERROR(common_loop, Code, Text2, Req#tftp_msg_req.filename))
+ end;
+ error when is_record(Prepared, tftp_msg_error) ->
+ #tftp_msg_error{code = Code, text = Text} = Prepared,
+ send_msg(Config, Req, Prepared),
+ terminate(Config, Req, ?ERROR(transfer, Code, Text, Req#tftp_msg_req.filename))
+ end;
+common_loop(Config, Callback, Req, TransferRes, LocalAccess, ExpectedBlockNo) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ Config2 = upgrade_config(Config),
+ common_loop(Config2, Callback, Req, TransferRes, LocalAccess, ExpectedBlockNo).
+
+-spec common_read(#config{}, #callback{}, _, 'read', _, _, #prepared{}) -> no_return().
+
+common_read(Config, _, Req, _, _, _, #prepared{status = terminate, result = Result}) ->
+ terminate(Config, Req, {ok, Result});
+common_read(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Prepared)
+ when ActualBlockNo =:= ExpectedBlockNo, is_record(Prepared, prepared) ->
+ case early_read(Config, Callback, Req, LocalAccess, ActualBlockNo, Prepared) of
+ {Callback2, #prepared{status = more, next_data = Data} = Prepared2} when is_binary(Data) ->
+ Prepared3 = Prepared2#prepared{prev_data = Data, next_data = undefined},
+ do_common_read(Config, Callback2, Req, LocalAccess, ActualBlockNo, Data, Prepared3);
+ {undefined, #prepared{status = last, next_data = Data} = Prepared2} when is_binary(Data) ->
+ Prepared3 = Prepared2#prepared{status = terminate},
+ do_common_read(Config, undefined, Req, LocalAccess, ActualBlockNo, Data, Prepared3);
+ {undefined, #prepared{status = error, result = Error}} ->
+ #tftp_msg_error{code = Code, text = Text} = Error,
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(read, Code, Text, Req#tftp_msg_req.filename))
+ end;
+common_read(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Prepared)
+ when ActualBlockNo =:= (ExpectedBlockNo - 1), is_record(Prepared, prepared) ->
+ case Prepared of
+ #prepared{status = more, prev_data = Data} when is_binary(Data) ->
+ do_common_read(Config, Callback, Req, LocalAccess, ActualBlockNo, Data, Prepared);
+ #prepared{status = last, prev_data = Data} when is_binary(Data) ->
+ do_common_read(Config, Callback, Req, LocalAccess, ActualBlockNo, Data, Prepared);
+ #prepared{status = error, result = Error} ->
+ #tftp_msg_error{code = Code, text = Text} = Error,
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(read, Code, Text, Req#tftp_msg_req.filename))
+ end;
+common_read(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Prepared)
+ when ActualBlockNo =< ExpectedBlockNo, is_record(Prepared, prepared) ->
+ %% error_logger:error_msg("TFTP READ ~s: Expected block ~p but got block ~p - IGNORED\n",
+ %% [Req#tftp_msg_req.filename, ExpectedBlockNo, ActualBlockNo]),
+ case Prepared of
+ #prepared{status = more, prev_data = Data} when is_binary(Data) ->
+ Reply = #tftp_msg_data{block_no = ExpectedBlockNo, data = Data},
+ {Config2, Callback2, TransferRes} =
+ wait_for_msg_and_handle_timeout(Config, Callback, Req, Reply, LocalAccess, ExpectedBlockNo, Prepared),
+ ?MODULE:common_loop(Config2, Callback2, Req, TransferRes, LocalAccess, ExpectedBlockNo);
+ #prepared{status = last, prev_data = Data} when is_binary(Data) ->
+ Reply = #tftp_msg_data{block_no = ExpectedBlockNo, data = Data},
+ {Config2, Callback2, TransferRes} =
+ wait_for_msg_and_handle_timeout(Config, Callback, Req, Reply, LocalAccess, ExpectedBlockNo, Prepared),
+ ?MODULE:common_loop(Config2, Callback2, Req, TransferRes, LocalAccess, ExpectedBlockNo);
+ #prepared{status = error, result = Error} ->
+ #tftp_msg_error{code = Code, text = Text} = Error,
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(read, Code, Text, Req#tftp_msg_req.filename))
+ end;
+common_read(Config, Callback, Req, _LocalAccess, ExpectedBlockNo, ActualBlockNo, Prepared)
+ when is_record(Prepared, prepared) ->
+ Code = badblk,
+ Text = "Unknown transfer ID = " ++
+ integer_to_list(ActualBlockNo) ++ " (" ++ integer_to_list(ExpectedBlockNo) ++ ")",
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(read, Code, Text, Req#tftp_msg_req.filename)).
+
+-spec do_common_read(#config{}, #callback{} | undefined, _, 'read', integer(), binary(), #prepared{}) -> no_return().
+
+do_common_read(Config, Callback, Req, LocalAccess, BlockNo, Data, Prepared)
+ when is_binary(Data), is_record(Prepared, prepared) ->
+ NextBlockNo = (BlockNo + 1) rem 65536,
+ Reply = #tftp_msg_data{block_no = NextBlockNo, data = Data},
+ {Config2, Callback2, TransferRes} =
+ transfer(Config, Callback, Req, Reply, LocalAccess, NextBlockNo, Prepared),
+ ?MODULE:common_loop(Config2, Callback2, Req, TransferRes, LocalAccess, NextBlockNo).
+
+-spec common_write(#config{}, #callback{}, _, 'write', integer(), integer(), _, #prepared{}) -> no_return().
+
+common_write(Config, _, Req, _, _, _, _, #prepared{status = terminate, result = Result}) ->
+ terminate(Config, Req, {ok, Result});
+common_write(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Data, Prepared)
+ when ActualBlockNo =:= ExpectedBlockNo, is_binary(Data), is_record(Prepared, prepared) ->
+ case callback({write, Data}, Config, Callback, Req) of
+ {Callback2, #prepared{status = more} = Prepared2} ->
+ common_ack(Config, Callback2, Req, LocalAccess, ActualBlockNo, Prepared2);
+ {undefined, #prepared{status = last, result = Result} = Prepared2} ->
+ Config2 = pre_terminate(Config, Req, {ok, Result}),
+ Prepared3 = Prepared2#prepared{status = terminate},
+ common_ack(Config2, undefined, Req, LocalAccess, ActualBlockNo, Prepared3);
+ {undefined, #prepared{status = error, result = Error}} ->
+ #tftp_msg_error{code = Code, text = Text} = Error,
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(write, Code, Text, Req#tftp_msg_req.filename))
+ end;
+common_write(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Data, Prepared)
+ when ActualBlockNo =:= (ExpectedBlockNo - 1), is_binary(Data), is_record(Prepared, prepared) ->
+ common_ack(Config, Callback, Req, LocalAccess, ExpectedBlockNo - 1, Prepared);
+common_write(Config, Callback, Req, LocalAccess, ExpectedBlockNo, ActualBlockNo, Data, Prepared)
+ when ActualBlockNo =< ExpectedBlockNo, is_binary(Data), is_record(Prepared, prepared) ->
+ %% error_logger:error_msg("TFTP WRITE ~s: Expected block ~p but got block ~p - IGNORED\n",
+ %% [Req#tftp_msg_req.filename, ExpectedBlockNo, ActualBlockNo]),
+ Reply = #tftp_msg_ack{block_no = ExpectedBlockNo},
+ {Config2, Callback2, TransferRes} =
+ wait_for_msg_and_handle_timeout(Config, Callback, Req, Reply, LocalAccess, ExpectedBlockNo, Prepared),
+ ?MODULE:common_loop(Config2, Callback2, Req, TransferRes, LocalAccess, ExpectedBlockNo);
+common_write(Config, Callback, Req, _, ExpectedBlockNo, ActualBlockNo, Data, Prepared)
+ when is_binary(Data), is_record(Prepared, prepared) ->
+ Code = badblk,
+ Text = "Unknown transfer ID = " ++
+ integer_to_list(ActualBlockNo) ++ " (" ++ integer_to_list(ExpectedBlockNo) ++ ")",
+ {undefined, Error} =
+ callback({abort, {Code, Text}}, Config, Callback, Req),
+ send_msg(Config, Req, Error),
+ terminate(Config, Req, ?ERROR(write, Code, Text, Req#tftp_msg_req.filename)).
+
+common_ack(Config, Callback, Req, LocalAccess, BlockNo, Prepared)
+ when is_record(Prepared, prepared) ->
+ Reply = #tftp_msg_ack{block_no = BlockNo},
+ NextBlockNo = (BlockNo + 1) rem 65536,
+ {Config2, Callback2, TransferRes} =
+ transfer(Config, Callback, Req, Reply, LocalAccess, NextBlockNo, Prepared),
+ ?MODULE:common_loop(Config2, Callback2, Req, TransferRes, LocalAccess, NextBlockNo).
+
+pre_terminate(Config, Req, Result) ->
+ if
+ Req#tftp_msg_req.local_filename =/= undefined,
+ Config#config.parent_pid =/= undefined ->
+ proc_lib:init_ack(Result),
+ unlink(Config#config.parent_pid),
+ Config#config{parent_pid = undefined, polite_ack = true};
+ true ->
+ Config#config{polite_ack = true}
+ end.
+
+-spec terminate(#config{}, #tftp_msg_req{}, {'ok', _} | #error{}) -> no_return().
+
+terminate(Config, Req, Result) ->
+ Result2 =
+ case Result of
+ {ok, _} ->
+ Result;
+ #error{where = Where, code = Code, text = Text} = Error ->
+ print_debug_info(Config, Req, Where, Error#error{filename = Req#tftp_msg_req.filename}),
+ {error, {Where, Code, Text}}
+ end,
+ if
+ Config#config.parent_pid =:= undefined ->
+ close_port(Config, client, Req),
+ exit(normal);
+ Req#tftp_msg_req.local_filename =/= undefined ->
+ %% Client
+ close_port(Config, client, Req),
+ proc_lib:init_ack(Result2),
+ unlink(Config#config.parent_pid),
+ exit(normal);
+ true ->
+ %% Server
+ close_port(Config, server, Req),
+ exit(shutdown)
+ end.
+
+close_port(Config, Who, Req) when is_record(Req, tftp_msg_req) ->
+ case Config#config.udp_socket of
+ undefined ->
+ ignore;
+ Socket ->
+ print_debug_info(Config, Who, close, Req),
+ gen_udp:close(Socket)
+ end.
+
+open_free_port(Config, Who, Req) when is_record(Config, config), is_record(Req, tftp_msg_req) ->
+ UdpOptions = Config#config.udp_options,
+ case Config#config.port_policy of
+ random ->
+ %% BUGBUG: Should be a random port
+ case catch gen_udp:open(0, UdpOptions) of
+ {ok, Socket} ->
+ Config2 = Config#config{udp_socket = Socket},
+ print_debug_info(Config2, Who, open, Req),
+ {ok, Config2};
+ {error, Reason} ->
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [[0 | UdpOptions], Reason])),
+ ?ERROR(open, undef, Text, Req#tftp_msg_req.filename);
+ {'EXIT', _} = Reason ->
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [[0 | UdpOptions], Reason])),
+ ?ERROR(open, undef, Text, Req#tftp_msg_req.filename)
+ end;
+ {range, Port, Max} when Port =< Max ->
+ case catch gen_udp:open(Port, UdpOptions) of
+ {ok, Socket} ->
+ Config2 = Config#config{udp_socket = Socket},
+ print_debug_info(Config2, Who, open, Req),
+ {ok, Config2};
+ {error, eaddrinuse} ->
+ PortPolicy = {range, Port + 1, Max},
+ Config2 = Config#config{port_policy = PortPolicy},
+ open_free_port(Config2, Who, Req);
+ {error, Reason} ->
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [[Port | UdpOptions], Reason])),
+ ?ERROR(open, undef, Text, Req#tftp_msg_req.filename);
+ {'EXIT', _} = Reason->
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [[Port | UdpOptions], Reason])),
+ ?ERROR(open, undef, Text, Req#tftp_msg_req.filename)
+ end;
+ {range, Port, _Max} ->
+ Reason = "Port range exhausted",
+ Text = lists:flatten(io_lib:format("UDP open ~p -> ~p", [[Port | UdpOptions], Reason])),
+ ?ERROR(Who, undef, Text, Req#tftp_msg_req.filename)
+ end.
+
+%%-------------------------------------------------------------------
+%% Transfer
+%%-------------------------------------------------------------------
+
+%% Returns {Config, Callback, #transfer_res{}}
+transfer(Config, Callback, Req, Msg, LocalAccess, NextBlockNo, Prepared)
+ when is_record(Prepared, prepared) ->
+ IoList = tftp_lib:encode_msg(Msg),
+ Retries = Config#config.max_retries + 1,
+ do_transfer(Config, Callback, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared, Retries).
+
+do_transfer(Config, Callback, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared, Retries)
+ when is_record(Prepared, prepared), is_integer(Retries), Retries >= 0 ->
+ case do_send_msg(Config, Req, Msg, IoList) of
+ ok ->
+ {Callback2, Prepared2} =
+ early_read(Config, Callback, Req, LocalAccess, NextBlockNo, Prepared),
+ do_wait_for_msg_and_handle_timeout(Config, Callback2, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared2, Retries);
+ {error, _Reason} when Retries > 0 ->
+ Retries2 = 0, % Just retry once when send fails
+ do_transfer(Config, Callback, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared, Retries2);
+ {error, Reason} ->
+ Code = undef,
+ Text = lists:flatten(io_lib:format("Transfer failed - giving up -> ~p", [Reason])),
+ Error = #tftp_msg_error{code = Code, text = Text},
+ {Config, Callback, #transfer_res{status = error, prepared = Error}}
+ end.
+
+wait_for_msg_and_handle_timeout(Config, Callback, Req, Msg, LocalAccess, NextBlockNo, Prepared) ->
+ IoList = tftp_lib:encode_msg(Msg),
+ Retries = Config#config.max_retries + 1,
+ do_wait_for_msg_and_handle_timeout(Config, Callback, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared, Retries).
+
+do_wait_for_msg_and_handle_timeout(Config, Callback, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared, Retries) ->
+ Code = undef,
+ Text = "Transfer timed out.",
+ case wait_for_msg(Config, Callback, Req) of
+ timeout when Config#config.polite_ack =:= true ->
+ do_send_msg(Config, Req, Msg, IoList),
+ case Prepared of
+ #prepared{status = terminate, result = Result} ->
+ terminate(Config, Req, {ok, Result});
+ #prepared{} ->
+ terminate(Config, Req, ?ERROR(transfer, Code, Text, Req#tftp_msg_req.filename))
+ end;
+ timeout when Retries > 0 ->
+ Retries2 = Retries - 1,
+ do_transfer(Config, Callback, Req, Msg, IoList, LocalAccess, NextBlockNo, Prepared, Retries2);
+ timeout ->
+ Error = #tftp_msg_error{code = Code, text = Text},
+ {Config, Callback, #transfer_res{status = error, prepared = Error}};
+ {Config2, DecodedMsg} ->
+ {Config2, Callback, #transfer_res{status = ok, decoded_msg = DecodedMsg, prepared = Prepared}}
+ end.
+
+send_msg(Config, Req, Msg) ->
+ case catch tftp_lib:encode_msg(Msg) of
+ {'EXIT', Reason} ->
+ Code = undef,
+ Text = "Internal error. Encode failed",
+ Msg2 = #tftp_msg_error{code = Code, text = Text, details = Reason},
+ send_msg(Config, Req, Msg2);
+ IoList ->
+ do_send_msg(Config, Req, Msg, IoList)
+ end.
+
+do_send_msg(#config{udp_socket = Socket, udp_host = RemoteHost, udp_port = RemotePort} = Config, Req, Msg, IoList) ->
+ %% {ok, LocalPort} = inet:port(Socket),
+ %% if
+ %% LocalPort =/= ?TFTP_DEFAULT_PORT ->
+ %% ok;
+ %% true ->
+ %% print_debug_info(Config#config{debug_level = all}, Req, send, Msg),
+ %% error(Config,
+ %% "Daemon replies from the default port (~p)\n\t to ~p:~p\n\t¨~p\n",
+ %% [LocalPort, RemoteHost, RemotePort, Msg])
+ %% end,
+
+ print_debug_info(Config, Req, send, Msg),
+
+ %% case os:getenv("TFTPDUMP") of
+ %% false ->
+ %% ignore;
+ %% DumpPath ->
+ %% trace_udp_send(Req, Msg, IoList, DumpPath)
+ %% end,
+ Res = gen_udp:send(Socket, RemoteHost, RemotePort, IoList),
+ case Res of
+ ok ->
+ ok;
+ {error, einval = Reason} ->
+ error_msg(Config,
+ "Stacktrace; ~p\n gen_udp:send(~p, ~p, ~p, ~p) -> ~p\n",
+ [erlang:get_stacktrace(), Socket, RemoteHost, RemotePort, IoList, {error, Reason}]);
+ {error, Reason} ->
+ {error, Reason}
+ end.
+
+%% trace_udp_send(#tftp_msg_req{filename = [$/ | RelFile]} = Req, Msg, IoList, DumpPath) ->
+%% trace_udp_send(Req#tftp_msg_req{filename = RelFile}, Msg, IoList, DumpPath);
+%% trace_udp_send(#tftp_msg_req{filename = RelFile},
+%% #tftp_msg_data{block_no = BlockNo, data = Data},
+%% _IoList,
+%% DumpPath) ->
+%% File = filename:join([DumpPath, RelFile, "block" ++ string:right(integer_to_list(BlockNo), 5, $0) ++ ".dump"]),
+%% if
+%% (BlockNo rem 1000) =:= 1 ->
+%% info_msg(Config, "TFTPDUMP: Data ~s\n", [File]);
+%% true ->
+%% ignore
+%% end,
+%% ok = filelib:ensure_dir(File),
+%% ok = file:write_file(File, Data);
+%% trace_udp_send(#tftp_msg_req{filename = RelFile}, Msg, _IoList, _DumpPath) ->
+%% info_msg(Config, "TFTPDUMP: No data ~s -> ~p\n", [RelFile, element(1, Msg)]).
+
+wait_for_msg(Config, Callback, Req) ->
+ receive
+ {udp, Socket, RemoteHost, RemotePort, Bin}
+ when is_binary(Bin), Callback#callback.block_no =:= undefined ->
+ %% Client prepare
+ inet:setopts(Socket, [{active, once}]),
+ Config2 = Config#config{udp_host = RemoteHost,
+ udp_port = RemotePort},
+ DecodedMsg = (catch tftp_lib:decode_msg(Bin)),
+ print_debug_info(Config2, Req, recv, DecodedMsg),
+ {Config2, DecodedMsg};
+ {udp, Socket, Host, Port, Bin} when is_binary(Bin),
+ Config#config.udp_host =:= Host,
+ Config#config.udp_port =:= Port ->
+ inet:setopts(Socket, [{active, once}]),
+ DecodedMsg = (catch tftp_lib:decode_msg(Bin)),
+ print_debug_info(Config, Req, recv, DecodedMsg),
+ {Config, DecodedMsg};
+ {info, Ref, FromPid} when is_pid(FromPid) ->
+ Type =
+ case Req#tftp_msg_req.local_filename =/= undefined of
+ true -> client;
+ false -> server
+ end,
+ Info = internal_info(Config, Type),
+ reply({ok, Info}, Ref, FromPid),
+ wait_for_msg(Config, Callback, Req);
+ {{change_config, Options}, Ref, FromPid} when is_pid(FromPid) ->
+ case catch tftp_lib:parse_config(Options, Config) of
+ {'EXIT', Reason} ->
+ reply({error, Reason}, Ref, FromPid),
+ wait_for_msg(Config, Callback, Req);
+ Config2 when is_record(Config2, config) ->
+ reply(ok, Ref, FromPid),
+ wait_for_msg(Config2, Callback, Req)
+ end;
+ {system, From, Msg} ->
+ Misc = #sys_misc{module = ?MODULE, function = wait_for_msg, arguments = [Config, Callback, Req]},
+ sys:handle_system_msg(Msg, From, Config#config.parent_pid, ?MODULE, [], Misc);
+ {'EXIT', Pid, _Reason} when Config#config.parent_pid =:= Pid ->
+ Code = undef,
+ Text = "Parent exited.",
+ terminate(Config, Req, ?ERROR(wait_for_msg, Code, Text, Req#tftp_msg_req.filename));
+ Msg when Req#tftp_msg_req.local_filename =/= undefined ->
+ warning_msg(Config, "Client received : ~p", [Msg]),
+ wait_for_msg(Config, Callback, Req);
+ Msg when Req#tftp_msg_req.local_filename =:= undefined ->
+ warning_msg(Config, "Server received : ~p", [Msg]),
+ wait_for_msg(Config, Callback, Req)
+ after Config#config.timeout * 1000 ->
+ print_debug_info(Config, Req, recv, timeout),
+ timeout
+ end.
+
+early_read(Config, Callback, Req, LocalAccess, _NextBlockNo,
+ #prepared{status = Status, next_data = NextData, prev_data = PrevData} = Prepared) ->
+ if
+ Status =/= terminate,
+ LocalAccess =:= read,
+ Callback#callback.block_no =/= undefined,
+ NextData =:= undefined ->
+ case callback(read, Config, Callback, Req) of
+ {undefined, Error} when is_record(Error, tftp_msg_error) ->
+ {undefined, Error};
+ {Callback2, Prepared2} when is_record(Prepared2, prepared)->
+ {Callback2, Prepared2#prepared{prev_data = PrevData}}
+ end;
+ true ->
+ {Callback, Prepared}
+ end.
+
+%%-------------------------------------------------------------------
+%% Callback
+%%-------------------------------------------------------------------
+
+callback(Access, Config, Callback, Req) ->
+ {Callback2, Result} =
+ do_callback(Access, Config, Callback, Req),
+ print_debug_info(Config, Req, call, {Callback2, Result}),
+ {Callback2, Result}.
+
+do_callback(read = Fun, Config, Callback, Req)
+ when is_record(Config, config),
+ is_record(Callback, callback),
+ is_record(Req, tftp_msg_req) ->
+ Args = [Callback#callback.state],
+ NextBlockNo = Callback#callback.block_no + 1,
+ case catch safe_apply(Callback#callback.module, Fun, Args) of
+ {more, Bin, NewState} when is_binary(Bin) ->
+ Count = Callback#callback.count + size(Bin),
+ Callback2 = Callback#callback{state = NewState,
+ block_no = NextBlockNo,
+ count = Count},
+ Prepared = #prepared{status = more,
+ result = undefined,
+ block_no = NextBlockNo,
+ next_data = Bin},
+ verify_count(Config, Callback2, Req, Prepared);
+ {last, Bin, Result} when is_binary(Bin) ->
+ Prepared = #prepared{status = last,
+ result = Result,
+ block_no = NextBlockNo,
+ next_data = Bin},
+ {undefined, Prepared};
+ {error, {Code, Text}} ->
+ Error = #tftp_msg_error{code = Code, text = Text},
+ Prepared = #prepared{status = error,
+ result = Error},
+ {undefined, Prepared};
+ Illegal ->
+ Code = undef,
+ Text = "Internal error. File handler error.",
+ callback({abort, {Code, Text, Illegal}}, Config, Callback, Req)
+ end;
+do_callback({write = Fun, Bin}, Config, Callback, Req)
+ when is_record(Config, config),
+ is_record(Callback, callback),
+ is_record(Req, tftp_msg_req),
+ is_binary(Bin) ->
+ Args = [Bin, Callback#callback.state],
+ NextBlockNo = Callback#callback.block_no + 1,
+ case catch safe_apply(Callback#callback.module, Fun, Args) of
+ {more, NewState} ->
+ Count = Callback#callback.count + size(Bin),
+ Callback2 = Callback#callback{state = NewState,
+ block_no = NextBlockNo,
+ count = Count},
+ Prepared = #prepared{status = more,
+ block_no = NextBlockNo},
+ verify_count(Config, Callback2, Req, Prepared);
+ {last, Result} ->
+ Prepared = #prepared{status = last,
+ result = Result,
+ block_no = NextBlockNo},
+ {undefined, Prepared};
+ {error, {Code, Text}} ->
+ Error = #tftp_msg_error{code = Code, text = Text},
+ Prepared = #prepared{status = error,
+ result = Error},
+ {undefined, Prepared};
+ Illegal ->
+ Code = undef,
+ Text = "Internal error. File handler error.",
+ callback({abort, {Code, Text, Illegal}}, Config, Callback, Req)
+ end;
+do_callback({open, Type}, Config, Callback, Req)
+ when is_record(Config, config),
+ is_record(Callback, callback),
+ is_record(Req, tftp_msg_req) ->
+ {Access, Filename} = local_file_access(Req),
+ {Fun, BlockNo} =
+ case Type of
+ client_prepare -> {prepare, undefined};
+ client_open -> {open, 0};
+ server_open -> {open, 0}
+ end,
+ Mod = Callback#callback.module,
+ Args = [Access,
+ Filename,
+ Req#tftp_msg_req.mode,
+ Req#tftp_msg_req.options,
+ Callback#callback.state],
+ PeerInfo = peer_info(Config),
+ fast_ensure_loaded(Mod),
+ Args2 =
+ case erlang:function_exported(Mod, Fun, length(Args)) of
+ true -> Args;
+ false -> [PeerInfo | Args]
+ end,
+ case catch safe_apply(Mod, Fun, Args2) of
+ {ok, AcceptedOptions, NewState} ->
+ Callback2 = Callback#callback{state = NewState,
+ block_no = BlockNo,
+ count = 0},
+ {Callback2, {ok, AcceptedOptions}};
+ {error, {Code, Text}} ->
+ {undefined, #tftp_msg_error{code = Code, text = Text}};
+ Illegal ->
+ Code = undef,
+ Text = "Internal error. File handler error.",
+ callback({abort, {Code, Text, Illegal}}, Config, Callback, Req)
+ end;
+do_callback({abort, {Code, Text}}, Config, Callback, Req) ->
+ Error = #tftp_msg_error{code = Code, text = Text},
+ do_callback({abort, Error}, Config, Callback, Req);
+do_callback({abort, {Code, Text, Details}}, Config, Callback, Req) ->
+ Error = #tftp_msg_error{code = Code, text = Text, details = Details},
+ do_callback({abort, Error}, Config, Callback, Req);
+do_callback({abort = Fun, #tftp_msg_error{code = Code, text = Text} = Error}, Config, Callback, Req)
+ when is_record(Config, config),
+ is_record(Callback, callback),
+ is_record(Req, tftp_msg_req) ->
+ Args = [Code, Text, Callback#callback.state],
+ catch safe_apply(Callback#callback.module, Fun, Args),
+ {undefined, Error};
+do_callback({abort, Error}, _Config, undefined, _Req) when is_record(Error, tftp_msg_error) ->
+ {undefined, Error}.
+
+peer_info(#config{udp_host = Host, udp_port = Port}) ->
+ if
+ is_tuple(Host), size(Host) =:= 4 ->
+ {inet, tftp_lib:host_to_string(Host), Port};
+ is_tuple(Host), size(Host) =:= 8 ->
+ {inet6, tftp_lib:host_to_string(Host), Port};
+ true ->
+ {undefined, Host, Port}
+ end.
+
+match_callback(Filename, Callbacks) ->
+ if
+ Filename =:= binary ->
+ lookup_callback_mod(tftp_binary, Callbacks);
+ is_binary(Filename) ->
+ lookup_callback_mod(tftp_binary, Callbacks);
+ true ->
+ do_match_callback(Filename, Callbacks)
+ end.
+
+do_match_callback(Filename, [C | Tail]) when is_record(C, callback) ->
+ case catch re:run(Filename, C#callback.internal, [{capture, none}]) of
+ match ->
+ {ok, C};
+ nomatch ->
+ do_match_callback(Filename, Tail);
+ Details ->
+ Code = baduser,
+ Text = "Internal error. File handler not found",
+ {error, #tftp_msg_error{code = Code, text = Text, details = Details}}
+ end;
+do_match_callback(Filename, []) ->
+ Code = baduser,
+ Text = "Internal error. File handler not found",
+ {error, #tftp_msg_error{code = Code, text = Text, details = Filename}}.
+
+lookup_callback_mod(Mod, Callbacks) ->
+ {value, C} = lists:keysearch(Mod, #callback.module, Callbacks),
+ {ok, C}.
+
+verify_count(Config, Callback, Req, Result) ->
+ case Config#config.max_tsize of
+ infinity ->
+ {Callback, Result};
+ Max when Callback#callback.count =< Max ->
+ {Callback, Result};
+ _Max ->
+ Code = enospc,
+ Text = "Too large file.",
+ callback({abort, {Code, Text}}, Config, Callback, Req)
+ end.
+
+%%-------------------------------------------------------------------
+%% Miscellaneous
+%%-------------------------------------------------------------------
+
+internal_info(Config, Type) when is_record(Config, config) ->
+ {ok, ActualPort} = inet:port(Config#config.udp_socket),
+ [
+ {type, Type},
+ {host, tftp_lib:host_to_string(Config#config.udp_host)},
+ {port, Config#config.udp_port},
+ {local_port, ActualPort},
+ {port_policy, Config#config.port_policy},
+ {udp, Config#config.udp_options},
+ {use_tsize, Config#config.use_tsize},
+ {max_tsize, Config#config.max_tsize},
+ {max_conn, Config#config.max_conn},
+ {rejected, Config#config.rejected},
+ {timeout, Config#config.timeout},
+ {polite_ack, Config#config.polite_ack},
+ {debug, Config#config.debug_level},
+ {parent_pid, Config#config.parent_pid}
+ ] ++ Config#config.user_options ++ Config#config.callbacks.
+
+local_file_access(#tftp_msg_req{access = Access,
+ local_filename = Local,
+ filename = Filename}) ->
+ case Local =:= undefined of
+ true ->
+ %% Server side
+ {Access, Filename};
+ false ->
+ %% Client side
+ case Access of
+ read -> {write, Local};
+ write -> {read, Local}
+ end
+ end.
+
+pre_verify_options(Config, Req) ->
+ Options = Req#tftp_msg_req.options,
+ case catch verify_reject(Config, Req, Options) of
+ ok ->
+ case verify_integer("tsize", 0, Config#config.max_tsize, Options) of
+ true ->
+ case verify_integer("blksize", 0, 65464, Options) of
+ true ->
+ ok;
+ false ->
+ {error, {badopt, "Too large blksize"}}
+ end;
+ false ->
+ {error, {badopt, "Too large tsize"}}
+ end;
+ {error, Reason} ->
+ {error, Reason}
+ end.
+
+post_verify_options(Config, Req, NewOptions, Text) ->
+ OldOptions = Req#tftp_msg_req.options,
+ BadOptions =
+ [Key || {Key, _Val} <- NewOptions,
+ not lists:keymember(Key, 1, OldOptions)],
+ case BadOptions =:= [] of
+ true ->
+ Config2 = Config#config{timeout = lookup_timeout(NewOptions)},
+ Req2 = Req#tftp_msg_req{options = NewOptions},
+ {ok, Config2, Req2};
+ false ->
+ {error, {badopt, Text}}
+ end.
+
+verify_reject(Config, Req, Options) ->
+ Access = Req#tftp_msg_req.access,
+ Rejected = Config#config.rejected,
+ case lists:member(Access, Rejected) of
+ true ->
+ {error, {eacces, atom_to_list(Access) ++ " mode not allowed"}};
+ false ->
+ [throw({error, {badopt, Key ++ " not allowed"}}) ||
+ {Key, _} <- Options, lists:member(Key, Rejected)],
+ ok
+ end.
+
+lookup_timeout(Options) ->
+ case lists:keysearch("timeout", 1, Options) of
+ {value, {_, Val}} ->
+ list_to_integer(Val);
+ false ->
+ 3
+ end.
+
+lookup_mode(Options) ->
+ case lists:keysearch("mode", 1, Options) of
+ {value, {_, Val}} ->
+ Val;
+ false ->
+ "octet"
+ end.
+
+verify_integer(Key, Min, Max, Options) ->
+ case lists:keysearch(Key, 1, Options) of
+ {value, {_, Val}} when is_list(Val) ->
+ case catch list_to_integer(Val) of
+ {'EXIT', _} ->
+ false;
+ Int when Int >= Min, is_integer(Min),
+ Max =:= infinity ->
+ true;
+ Int when Int >= Min, is_integer(Min),
+ Int =< Max, is_integer(Max) ->
+ true;
+ _ ->
+ false
+ end;
+ false ->
+ true
+ end.
+
+error_msg(#config{logger = Logger, debug_level = _Level}, F, A) ->
+ safe_apply(Logger, error_msg, [F, A]).
+
+warning_msg(#config{logger = Logger, debug_level = Level}, F, A) ->
+ case Level of
+ none -> ok;
+ error -> ok;
+ _ -> safe_apply(Logger, warning_msg, [F, A])
+ end.
+
+info_msg(#config{logger = Logger}, F, A) ->
+ safe_apply(Logger, info_msg, [F, A]).
+
+safe_apply(Mod, Fun, Args) ->
+ fast_ensure_loaded(Mod),
+ apply(Mod, Fun, Args).
+
+fast_ensure_loaded(Mod) ->
+ case erlang:function_exported(Mod, module_info, 0) of
+ true ->
+ ok;
+ false ->
+ Res = code:load_file(Mod),
+ %% io:format("tftp: code:load_file(~p) -> ~p\n", [Mod, Res]), %% XXX
+ Res
+ end.
+
+print_debug_info(#config{debug_level = Level} = Config, Who, Where, Data) ->
+ if
+ Level =:= none ->
+ ok;
+ is_record(Data, error) ->
+ do_print_debug_info(Config, Who, Where, Data);
+ Level =:= warning ->
+ ok;
+ Level =:= error ->
+ ok;
+ Level =:= all ->
+ do_print_debug_info(Config, Who, Where, Data);
+ Where =:= open ->
+ do_print_debug_info(Config, Who, Where, Data);
+ Where =:= close ->
+ do_print_debug_info(Config, Who, Where, Data);
+ Level =:= brief ->
+ ok;
+ Where =/= recv, Where =/= send ->
+ ok;
+ is_record(Data, tftp_msg_data), Level =:= normal ->
+ ok;
+ is_record(Data, tftp_msg_ack), Level =:= normal ->
+ ok;
+ true ->
+ do_print_debug_info(Config, Who, Where, Data)
+ end.
+
+do_print_debug_info(Config, Who, Where, #tftp_msg_data{data = Bin} = Msg) when is_binary(Bin) ->
+ Msg2 = Msg#tftp_msg_data{data = {bytes, size(Bin)}},
+ do_print_debug_info(Config, Who, Where, Msg2);
+do_print_debug_info(Config, Who, Where, #tftp_msg_req{local_filename = Filename} = Msg) when is_binary(Filename) ->
+ Msg2 = Msg#tftp_msg_req{local_filename = binary},
+ do_print_debug_info(Config, Who, Where, Msg2);
+do_print_debug_info(Config, Who, Where, Data) ->
+ Local =
+ case catch inet:port(Config#config.udp_socket) of
+ {'EXIT', _Reason} ->
+ 0;
+ {ok, Port} ->
+ Port
+ end,
+ %% Remote = Config#config.udp_port,
+ PeerInfo = lists:flatten(io_lib:format("~p", [peer_info(Config)])),
+ Side =
+ if
+ is_record(Who, tftp_msg_req),
+ Who#tftp_msg_req.local_filename =/= undefined ->
+ client;
+ is_record(Who, tftp_msg_req),
+ Who#tftp_msg_req.local_filename =:= undefined ->
+ server;
+ is_atom(Who) ->
+ Who
+ end,
+ case {Where, Data} of
+ {_, #error{where = Where, code = Code, text = Text, filename = Filename}} ->
+ do_format(Config, Side, Local, "error ~s ->\n\t~p ~p\n\t~p ~p: ~s\n",
+ [PeerInfo, self(), Filename, Where, Code, Text]);
+ {open, #tftp_msg_req{filename = Filename}} ->
+ do_format(Config, Side, Local, "open ~s ->\n\t~p ~p\n",
+ [PeerInfo, self(), Filename]);
+ {close, #tftp_msg_req{filename = Filename}} ->
+ do_format(Config, Side, Local, "close ~s ->\n\t~p ~p\n",
+ [PeerInfo, self(), Filename]);
+ {recv, _} ->
+ do_format(Config, Side, Local, "recv ~s <-\n\t~p\n",
+ [PeerInfo, Data]);
+ {send, _} ->
+ do_format(Config, Side, Local, "send ~s ->\n\t~p\n",
+ [PeerInfo, Data]);
+ {match, _} when is_record(Data, callback) ->
+ Mod = Data#callback.module,
+ State = Data#callback.state,
+ do_format(Config, Side, Local, "match ~s ~p =>\n\t~p\n",
+ [PeerInfo, Mod, State]);
+ {call, _} ->
+ case Data of
+ {Callback, _Result} when is_record(Callback, callback) ->
+ Mod = Callback#callback.module,
+ State = Callback#callback.state,
+ do_format(Config, Side, Local, "call ~s ~p =>\n\t~p\n",
+ [PeerInfo, Mod, State]);
+ {undefined, Result} ->
+ do_format(Config, Side, Local, "call ~s result =>\n\t~p\n",
+ [PeerInfo, Result])
+ end
+ end.
+
+do_format(Config, Side, Local, Format, Args) ->
+ info_msg(Config, "~p(~p): " ++ Format, [Side, Local | Args]).
+
+%%-------------------------------------------------------------------
+%% System upgrade
+%%-------------------------------------------------------------------
+
+system_continue(_Parent, _Debug, #sys_misc{module = Mod, function = Fun, arguments = Args}) ->
+ apply(Mod, Fun, Args);
+system_continue(Parent, Debug, {Fun, Args}) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ system_continue(Parent, Debug, #sys_misc{module = ?MODULE, function = Fun, arguments = Args}).
+
+-spec system_terminate(_, _, _, #sys_misc{} | {_, _}) -> no_return().
+
+system_terminate(Reason, _Parent, _Debug, #sys_misc{}) ->
+ exit(Reason);
+system_terminate(Reason, Parent, Debug, {Fun, Args}) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ system_terminate(Reason, Parent, Debug, #sys_misc{module = ?MODULE, function = Fun, arguments = Args}).
+
+system_code_change({Fun, Args}, _Module, _OldVsn, _Extra) ->
+ {ok, {Fun, Args}}.
diff --git a/lib/tftp/src/tftp_file.erl b/lib/tftp/src/tftp_file.erl
new file mode 100644
index 0000000000..7664324808
--- /dev/null
+++ b/lib/tftp/src/tftp_file.erl
@@ -0,0 +1,390 @@
+%%
+%% %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_file.erl
+%%% Author : Hakan Mattsson <[email protected]>
+%%% Description :
+%%%
+%%% Created : 24 May 2004 by Hakan Mattsson <[email protected]>
+%%%-------------------------------------------------------------------
+
+-module(tftp_file).
+
+%%%-------------------------------------------------------------------
+%%% Interface
+%%%-------------------------------------------------------------------
+
+-behaviour(tftp).
+
+-export([prepare/6, open/6, read/1, write/2, abort/3]).
+
+%%%-------------------------------------------------------------------
+%%% Defines
+%%%-------------------------------------------------------------------
+
+-include_lib("kernel/include/file.hrl").
+
+-record(initial,
+ {filename,
+ is_native_ascii}).
+
+-record(state,
+ {access,
+ filename,
+ is_native_ascii,
+ is_network_ascii,
+ root_dir,
+ options,
+ blksize,
+ fd,
+ count,
+ buffer}).
+
+%%-------------------------------------------------------------------
+%% prepare(Peer, Access, Filename, Mode, SuggestedOptions, InitialState) ->
+%% {ok, AcceptedOptions, NewState} | {error, Code, Text}
+%%
+%% Peer = {PeerType, PeerHost, PeerPort}
+%% PeerType = inet | inet6
+%% PeerHost = ip_address()
+%% PeerPort = integer()
+%% Acess = read | write
+%% Filename = string()
+%% Mode = string()
+%% SuggestedOptions = [{Key, Value}]
+%% AcceptedOptions = [{Key, Value}]
+%% Key = string()
+%% Value = string()
+%% InitialState = [] | [{root_dir, string()}]
+%% NewState = term()
+%% Code = undef | enoent | eacces | enospc |
+%% badop | eexist | baduser | badopt |
+%% integer()
+%% Text = string()
+%%
+%% Prepares open of a file on the client side.
+%%
+%% Will be followed by a call to open/4 before any read/write access
+%% is performed. The AcceptedOptions will be sent to the server which
+%% will reply with those options that it accepts. The options that are
+%% accepted by the server will be forwarded to open/4 as SuggestedOptions.
+%%
+%% No new options may be added, but the ones that are present as
+%% SuggestedOptions may be omitted or replaced with new values
+%% in the AcceptedOptions.
+%%-------------------------------------------------------------------
+
+prepare(_Peer, Access, Filename, Mode, SuggestedOptions, Initial) when is_list(Initial) ->
+ %% Client side
+ case catch handle_options(Access, Filename, Mode, SuggestedOptions, Initial) of
+ {ok, Filename2, IsNativeAscii, IsNetworkAscii, AcceptedOptions} ->
+ State = #state{access = Access,
+ filename = Filename2,
+ is_native_ascii = IsNativeAscii,
+ is_network_ascii = IsNetworkAscii,
+ options = AcceptedOptions,
+ blksize = lookup_blksize(AcceptedOptions),
+ count = 0,
+ buffer = []},
+ {ok, AcceptedOptions, State};
+ {error, {Code, Text}} ->
+ {error, {Code, Text}}
+ end.
+
+%% ---------------------------------------------------------
+%% open(Peer, Access, Filename, Mode, SuggestedOptions, State) ->
+%% {ok, AcceptedOptions, NewState} | {error, Code, Text}
+%%
+%% Peer = {PeerType, PeerHost, PeerPort}
+%% PeerType = inet | inet6
+%% PeerHost = ip_address()
+%% PeerPort = integer()
+%% Acess = read | write
+%% Filename = string()
+%% Mode = string()
+%% SuggestedOptions = [{Key, Value}]
+%% AcceptedOptions = [{Key, Value}]
+%% Key = string()
+%% Value = string()
+%% State = InitialState | #state{}
+%% InitialState = [] | [{root_dir, string()}]
+%% NewState = term()
+%% Code = undef | enoent | eacces | enospc |
+%% badop | eexist | baduser | badopt |
+%% integer()
+%% Text = string()
+%%
+%% Opens a file for read or write access.
+%%
+%% On the client side where the open/4 call has been preceeded by a
+%% call to prepare/4, all options must be accepted or rejected.
+%% On the server side, where there are no preceeding prepare/4 call,
+%% noo new options may be added, but the ones that are present as
+%% SuggestedOptions may be omitted or replaced with new values
+%% in the AcceptedOptions.
+%%-------------------------------------------------------------------
+
+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, state) ->
+ %% Both sides
+ case catch handle_options(Access, Filename, Mode, NegotiatedOptions, State) of
+ {ok, _Filename2, _IsNativeAscii, _IsNetworkAscii, Options}
+ when Options =:= NegotiatedOptions ->
+ do_open(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).
+
+do_open(State) when is_record(State, state) ->
+ case file:open(State#state.filename, file_options(State)) of
+ {ok, Fd} ->
+ {ok, State#state.options, State#state{fd = Fd}};
+ {error, Reason} when is_atom(Reason) ->
+ {error, file_error(Reason)}
+ end.
+
+file_options(State) ->
+ case State#state.access of
+ read -> [read, read_ahead, raw, binary];
+ write -> [write, delayed_write, raw, binary]
+ end.
+
+file_error(Reason) when is_atom(Reason) ->
+ Details = file:format_error(Reason),
+ case Reason of
+ eexist -> {Reason, Details};
+ enoent -> {Reason, Details};
+ eacces -> {Reason, Details};
+ eperm -> {eacces, Details};
+ enospc -> {Reason, Details};
+ _ -> {undef, Details ++ " (" ++ atom_to_list(Reason) ++ ")"}
+ end.
+
+%%-------------------------------------------------------------------
+%% read(State) ->
+%% {more, Bin, NewState} | {last, Bin, FileSize} | {error, {Code, Text}}
+%%
+%% State = term()
+%% NewState = term()
+%% Bin = binary()
+%% FileSize = integer()
+%% Code = undef | enoent | eacces | enospc |
+%% badop | eexist | baduser | badopt |
+%% integer()
+%% Text = string()
+%%
+%% Reads a chunk from the file
+%%
+%% The file is automatically closed when the last chunk is read.
+%%-------------------------------------------------------------------
+
+read(#state{access = read} = State) ->
+ BlkSize = State#state.blksize,
+ case file:read(State#state.fd, BlkSize) of
+ {ok, Bin} when is_binary(Bin), size(Bin) =:= BlkSize ->
+ Count = State#state.count + size(Bin),
+ {more, Bin, State#state{count = Count}};
+ {ok, Bin} when is_binary(Bin), size(Bin) < BlkSize ->
+ file:close(State#state.fd),
+ Count = State#state.count + size(Bin),
+ {last, Bin, Count};
+ eof ->
+ {last, <<>>, State#state.count};
+ {error, Reason} ->
+ file:close(State#state.fd),
+ {error, file_error(Reason)}
+ end;
+read(State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ State2 = upgrade_state(State),
+ read(State2).
+
+%%-------------------------------------------------------------------
+%% write(Bin, State) ->
+%% {more, NewState} | {last, FileSize} | {error, {Code, Text}}
+%%
+%% State = term()
+%% NewState = term()
+%% Bin = binary()
+%% FileSize = integer()
+%% Code = undef | enoent | eacces | enospc |
+%% badop | eexist | baduser | badopt |
+%% integer()
+%% Text = string()
+%%
+%% Writes a chunk to the file
+%%
+%% The file is automatically closed when the last chunk is written
+%%-------------------------------------------------------------------
+
+write(Bin, #state{access = write} = State) when is_binary(Bin) ->
+ Size = size(Bin),
+ BlkSize = State#state.blksize,
+ case file:write(State#state.fd, Bin) of
+ ok when Size =:= BlkSize->
+ Count = State#state.count + Size,
+ {more, State#state{count = Count}};
+ ok when Size < BlkSize->
+ file:close(State#state.fd),
+ Count = State#state.count + Size,
+ {last, Count};
+ {error, Reason} ->
+ file:close(State#state.fd),
+ file:delete(State#state.filename),
+ {error, file_error(Reason)}
+ end;
+write(Bin, State) ->
+ %% Handle upgrade from old releases. Please, remove this clause in next release.
+ State2 = upgrade_state(State),
+ write(Bin, State2).
+
+%%-------------------------------------------------------------------
+%% abort(Code, Text, State) -> ok
+%%
+%% State = term()
+%% Code = undef | enoent | eacces | enospc |
+%% badop | eexist | baduser | badopt |
+%% badblk | integer()
+%% Text = string()
+%%
+%% Aborts the file transfer
+%%-------------------------------------------------------------------
+
+abort(_Code, _Text, #state{fd = Fd, access = Access} = State) ->
+ file:close(Fd),
+ case Access of
+ write ->
+ ok = file:delete(State#state.filename);
+ read ->
+ ok
+ end.
+
+%%-------------------------------------------------------------------
+%% Process options
+%%-------------------------------------------------------------------
+
+handle_options(Access, Filename, Mode, Options, Initial) ->
+ I = #initial{filename = Filename, is_native_ascii = is_native_ascii()},
+ {Filename2, IsNativeAscii} = handle_initial(Initial, I),
+ IsNetworkAscii = handle_mode(Mode, IsNativeAscii),
+ Options2 = do_handle_options(Access, Filename2, Options),
+ {ok, Filename2, IsNativeAscii, IsNetworkAscii, Options2}.
+
+handle_mode(Mode, IsNativeAscii) ->
+ case Mode of
+ "netascii" when IsNativeAscii =:= true -> true;
+ "octet" -> false;
+ _ -> throw({error, {badop, "Illegal mode " ++ Mode}})
+ end.
+
+handle_initial([{root_dir, Dir} | Initial], I) ->
+ case catch filename_join(Dir, I#initial.filename) of
+ {'EXIT', _} ->
+ throw({error, {badop, "Internal error. root_dir is not a string"}});
+ Filename2 ->
+ handle_initial(Initial, I#initial{filename = Filename2})
+ end;
+handle_initial([{native_ascii, Bool} | Initial], I) ->
+ case Bool of
+ true -> handle_initial(Initial, I#initial{is_native_ascii = true});
+ false -> handle_initial(Initial, I#initial{is_native_ascii = false})
+ end;
+handle_initial([], I) when is_record(I, initial) ->
+ {I#initial.filename, I#initial.is_native_ascii};
+handle_initial(State, _) when is_record(State, state) ->
+ {State#state.filename, State#state.is_native_ascii}.
+
+filename_join(Dir, Filename) ->
+ case filename:pathtype(Filename) of
+ absolute ->
+ [_ | RelFilename] = filename:split(Filename),
+ filename:join([Dir, RelFilename]);
+ _ ->
+ filename:join([Dir, Filename])
+ end.
+
+do_handle_options(Access, Filename, [{Key, Val} | T]) ->
+ case Key of
+ "tsize" ->
+ case Access of
+ read when Val =:= "0" ->
+ case file:read_file_info(Filename) of
+ {ok, FI} ->
+ Tsize = integer_to_list(FI#file_info.size),
+ [{Key, Tsize} | do_handle_options(Access, Filename, T)];
+ {error, _} ->
+ do_handle_options(Access, Filename, T)
+ end;
+ _ ->
+ handle_integer(Access, Filename, Key, Val, T, 0, infinity)
+ end;
+ "blksize" ->
+ handle_integer(Access, Filename, Key, Val, T, 8, 65464);
+ "timeout" ->
+ handle_integer(Access, Filename, Key, Val, T, 1, 255);
+ _ ->
+ do_handle_options(Access, Filename, T)
+ end;
+do_handle_options(_Access, _Filename, []) ->
+ [].
+
+
+handle_integer(Access, Filename, Key, Val, Options, Min, Max) ->
+ case catch list_to_integer(Val) of
+ {'EXIT', _} ->
+ do_handle_options(Access, Filename, Options);
+ Int when Int >= Min, Int =< Max ->
+ [{Key, Val} | do_handle_options(Access, Filename, Options)];
+ Int when Int >= Min, Max =:= infinity ->
+ [{Key, Val} | do_handle_options(Access, Filename, 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() ->
+ case os:type() of
+ {win32, _} -> true;
+ _ -> false
+ end.
+
+%% Handle upgrade from old releases. Please, remove this function in next release.
+upgrade_state({state, Access, Filename, RootDir, Options, BlkSize, Fd, Count, Buffer}) ->
+ {state, Access, Filename, false, false, RootDir, Options, BlkSize, Fd, Count, Buffer}.
diff --git a/lib/tftp/src/tftp_lib.erl b/lib/tftp/src/tftp_lib.erl
new file mode 100644
index 0000000000..454754f0a3
--- /dev/null
+++ b/lib/tftp/src/tftp_lib.erl
@@ -0,0 +1,474 @@
+%%
+%% %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 : tftp_lib.erl
+%%% Author : Hakan Mattsson <[email protected]>
+%%% Description : Option parsing, decode, encode etc.
+%%%
+%%% Created : 18 May 2004 by Hakan Mattsson <[email protected]>
+%%%-------------------------------------------------------------------
+
+-module(tftp_lib).
+
+%%-------------------------------------------------------------------
+%% Interface
+%%-------------------------------------------------------------------
+
+%% application internal functions
+-export([
+ parse_config/1,
+ parse_config/2,
+ decode_msg/1,
+ encode_msg/1,
+ replace_val/3,
+ to_lower/1,
+ host_to_string/1,
+ add_default_callbacks/1
+ ]).
+
+%%-------------------------------------------------------------------
+%% Defines
+%%-------------------------------------------------------------------
+
+-include("tftp.hrl").
+
+-define(LOWER(Char),
+ if
+ Char >= $A, Char =< $Z ->
+ Char - ($A - $a);
+ true ->
+ Char
+ end).
+
+%%-------------------------------------------------------------------
+%% Config
+%%-------------------------------------------------------------------
+
+parse_config(Options) ->
+ parse_config(Options, #config{}).
+
+parse_config(Options, Config) ->
+ do_parse_config(Options, Config).
+
+do_parse_config([{Key, Val} | Tail], Config) when is_record(Config, config) ->
+ case Key of
+ debug ->
+ if
+ Val =:= 0; Val =:= none ->
+ do_parse_config(Tail, Config#config{debug_level = none});
+ Val =:= 1; Val =:= error ->
+ do_parse_config(Tail, Config#config{debug_level = error});
+ Val =:= 2; Val =:= warning ->
+ do_parse_config(Tail, Config#config{debug_level = warning});
+ Val =:= 3; Val =:= brief ->
+ do_parse_config(Tail, Config#config{debug_level = brief});
+ Val =:= 4; Val =:= normal ->
+ do_parse_config(Tail, Config#config{debug_level = normal});
+ Val =:= 5; Val =:= verbose ->
+ do_parse_config(Tail, Config#config{debug_level = verbose});
+ Val =:= 6; Val =:= all ->
+ do_parse_config(Tail, Config#config{debug_level = all});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ host ->
+ if
+ is_list(Val) ->
+ do_parse_config(Tail, Config#config{udp_host = Val});
+ is_tuple(Val), size(Val) =:= 4 ->
+ do_parse_config(Tail, Config#config{udp_host = Val});
+ is_tuple(Val), size(Val) =:= 8 ->
+ do_parse_config(Tail, Config#config{udp_host = Val});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ port ->
+ if
+ is_integer(Val), Val >= 0 ->
+ Config2 = Config#config{udp_port = Val, udp_options = Config#config.udp_options},
+ do_parse_config(Tail, Config2);
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ port_policy ->
+ case Val of
+ random ->
+ do_parse_config(Tail, Config#config{port_policy = Val});
+ 0 ->
+ do_parse_config(Tail, Config#config{port_policy = random});
+ MinMax when is_integer(MinMax), MinMax > 0 ->
+ do_parse_config(Tail, Config#config{port_policy = {range, MinMax, MinMax}});
+ {range, Min, Max} when Max >= Min,
+ is_integer(Min), Min > 0,
+ is_integer(Max), Max > 0 ->
+ do_parse_config(Tail, Config#config{port_policy = Val});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ udp when is_list(Val) ->
+ Fun =
+ fun({K, V}, List) when K /= active ->
+ replace_val(K, V, List);
+ (V, List) when V /= list, V /= binary ->
+ List ++ [V];
+ (V, _List) ->
+ exit({badarg, {udp, [V]}})
+ end,
+ UdpOptions = lists:foldl(Fun, Config#config.udp_options, Val),
+ do_parse_config(Tail, Config#config{udp_options = UdpOptions});
+ use_tsize ->
+ case Val of
+ true ->
+ do_parse_config(Tail, Config#config{use_tsize = Val});
+ false ->
+ do_parse_config(Tail, Config#config{use_tsize = Val});
+ _ ->
+ exit({badarg, {Key, Val}})
+ end;
+ max_tsize ->
+ if
+ Val =:= infinity ->
+ do_parse_config(Tail, Config#config{max_tsize = Val});
+ is_integer(Val), Val >= 0 ->
+ do_parse_config(Tail, Config#config{max_tsize = Val});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ max_conn ->
+ if
+ Val =:= infinity ->
+ do_parse_config(Tail, Config#config{max_conn = Val});
+ is_integer(Val), Val > 0 ->
+ do_parse_config(Tail, Config#config{max_conn = Val});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ _ when is_list(Key), is_list(Val) ->
+ Key2 = to_lower(Key),
+ Val2 = to_lower(Val),
+ TftpOptions = replace_val(Key2, Val2, Config#config.user_options),
+ do_parse_config(Tail, Config#config{user_options = TftpOptions});
+ reject ->
+ case Val of
+ read ->
+ Rejected = [Val | Config#config.rejected],
+ do_parse_config(Tail, Config#config{rejected = Rejected});
+ write ->
+ Rejected = [Val | Config#config.rejected],
+ do_parse_config(Tail, Config#config{rejected = Rejected});
+ _ when is_list(Val) ->
+ Rejected = [Val | Config#config.rejected],
+ do_parse_config(Tail, Config#config{rejected = Rejected});
+ _ ->
+ exit({badarg, {Key, Val}})
+ end;
+ callback ->
+ case Val of
+ {RegExp, Mod, State} when is_list(RegExp), is_atom(Mod) ->
+ case re:compile(RegExp) of
+ {ok, Internal} ->
+ Callback = #callback{regexp = RegExp,
+ internal = Internal,
+ module = Mod,
+ state = State},
+ Callbacks = Config#config.callbacks ++ [Callback],
+ do_parse_config(Tail, Config#config{callbacks = Callbacks});
+ {error, Reason} ->
+ exit({badarg, {Key, Val}, Reason})
+ end;
+ _ ->
+ exit({badarg, {Key, Val}})
+ end;
+ logger ->
+ if
+ is_atom(Val) ->
+ do_parse_config(Tail, Config#config{logger = Val});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ max_retries ->
+ if
+ is_integer(Val), Val > 0 ->
+ do_parse_config(Tail, Config#config{max_retries = Val});
+ true ->
+ exit({badarg, {Key, Val}})
+ end;
+ _ ->
+ exit({badarg, {Key, Val}})
+ end;
+do_parse_config([], #config{udp_host = Host,
+ udp_options = UdpOptions,
+ user_options = UserOptions,
+ callbacks = Callbacks} = Config) ->
+ IsInet6 = lists:member(inet6, UdpOptions),
+ IsInet = lists:member(inet, UdpOptions),
+ Host2 =
+ if
+ (IsInet and not IsInet6); (not IsInet and not IsInet6) ->
+ case inet:getaddr(Host, inet) of
+ {ok, Addr} ->
+ Addr;
+ {error, Reason} ->
+ exit({badarg, {host, Reason}})
+ end;
+ (IsInet6 and not IsInet) ->
+ case inet:getaddr(Host, inet6) of
+ {ok, Addr} ->
+ Addr;
+ {error, Reason} ->
+ exit({badarg, {host, Reason}})
+ end;
+ true ->
+ %% Conflicting options
+ exit({badarg, {udp, [inet]}})
+ end,
+ UdpOptions2 = lists:reverse(UdpOptions),
+ TftpOptions = lists:reverse(UserOptions),
+ Callbacks2 = add_default_callbacks(Callbacks),
+ Config#config{udp_host = Host2,
+ udp_options = UdpOptions2,
+ user_options = TftpOptions,
+ callbacks = Callbacks2};
+do_parse_config(Options, Config) when is_record(Config, config) ->
+ exit({badarg, Options}).
+
+add_default_callbacks(Callbacks) ->
+ RegExp = "",
+ {ok, Internal} = re:compile(RegExp),
+ File = #callback{regexp = RegExp,
+ internal = Internal,
+ module = tftp_file,
+ state = []},
+ Bin = #callback{regexp = RegExp,
+ internal = Internal,
+ module = tftp_binary,
+ state = []},
+ Callbacks ++ [File, Bin].
+
+host_to_string(Host) ->
+ case Host of
+ String when is_list(String) ->
+ String;
+ {A1, A2, A3, A4} -> % inet
+ lists:concat([A1, ".", A2, ".", A3, ".",A4]);
+ {A1, A2, A3, A4, A5, A6, A7, A8} -> % inet6
+ lists:concat([
+ int16_to_hex(A1), "::",
+ int16_to_hex(A2), "::",
+ int16_to_hex(A3), "::",
+ int16_to_hex(A4), "::",
+ int16_to_hex(A5), "::",
+ int16_to_hex(A6), "::",
+ int16_to_hex(A7), "::",
+ int16_to_hex(A8)
+ ])
+ end.
+
+int16_to_hex(0) ->
+ [$0];
+int16_to_hex(I) ->
+ N1 = ((I bsr 8) band 16#ff),
+ N2 = (I band 16#ff),
+ [code_character(N1 div 16), code_character(N1 rem 16),
+ code_character(N2 div 16), code_character(N2 rem 16)].
+
+code_character(N) when N < 10 ->
+ $0 + N;
+code_character(N) ->
+ $A + (N - 10).
+
+%%-------------------------------------------------------------------
+%% Decode
+%%-------------------------------------------------------------------
+
+decode_msg(Bin) when is_binary(Bin) ->
+ case Bin of
+ <<?TFTP_OPCODE_RRQ:16/integer, Tail/binary>> ->
+ case decode_strings(Tail, [keep_case, lower_case]) of
+ [Filename, Mode | Strings] ->
+ Options = decode_options(Strings),
+ #tftp_msg_req{access = read,
+ filename = Filename,
+ mode = to_lower(Mode),
+ options = Options};
+ [_Filename | _Strings] ->
+ exit(#tftp_msg_error{code = undef,
+ text = "Missing mode"});
+ _ ->
+ exit(#tftp_msg_error{code = undef,
+ text = "Missing filename"})
+ end;
+ <<?TFTP_OPCODE_WRQ:16/integer, Tail/binary>> ->
+ case decode_strings(Tail, [keep_case, lower_case]) of
+ [Filename, Mode | Strings] ->
+ Options = decode_options(Strings),
+ #tftp_msg_req{access = write,
+ filename = Filename,
+ mode = to_lower(Mode),
+ options = Options};
+ [_Filename | _Strings] ->
+ exit(#tftp_msg_error{code = undef,
+ text = "Missing mode"});
+ _ ->
+ exit(#tftp_msg_error{code = undef,
+ text = "Missing filename"})
+ end;
+ <<?TFTP_OPCODE_DATA:16/integer, SeqNo:16/integer, Data/binary>> ->
+ #tftp_msg_data{block_no = SeqNo, data = Data};
+ <<?TFTP_OPCODE_ACK:16/integer, SeqNo:16/integer>> ->
+ #tftp_msg_ack{block_no = SeqNo};
+ <<?TFTP_OPCODE_ERROR:16/integer, ErrorCode:16/integer, Tail/binary>> ->
+ case decode_strings(Tail, [keep_case]) of
+ [ErrorText] ->
+ ErrorCode2 = decode_error_code(ErrorCode),
+ #tftp_msg_error{code = ErrorCode2,
+ text = ErrorText};
+ _ ->
+ exit(#tftp_msg_error{code = undef,
+ text = "Trailing garbage"})
+ end;
+ <<?TFTP_OPCODE_OACK:16/integer, Tail/binary>> ->
+ Strings = decode_strings(Tail, [lower_case]),
+ Options = decode_options(Strings),
+ #tftp_msg_oack{options = Options};
+ _ ->
+ exit(#tftp_msg_error{code = undef,
+ text = "Invalid syntax"})
+ end.
+
+decode_strings(Bin, Cases) when is_binary(Bin), is_list(Cases) ->
+ do_decode_strings(Bin, Cases, []).
+
+do_decode_strings(<<>>, _Cases, Strings) ->
+ lists:reverse(Strings);
+do_decode_strings(Bin, [Case | Cases], Strings) ->
+ {String, Tail} = decode_string(Bin, Case, []),
+ if
+ Cases =:= [] ->
+ do_decode_strings(Tail, [Case], [String | Strings]);
+ true ->
+ do_decode_strings(Tail, Cases, [String | Strings])
+ end.
+
+decode_string(<<Char:8/integer, Tail/binary>>, Case, String) ->
+ if
+ Char =:= 0 ->
+ {lists:reverse(String), Tail};
+ Case =:= keep_case ->
+ decode_string(Tail, Case, [Char | String]);
+ Case =:= lower_case ->
+ Char2 = ?LOWER(Char),
+ decode_string(Tail, Case, [Char2 | String])
+ end;
+decode_string(<<>>, _Case, _String) ->
+ exit(#tftp_msg_error{code = undef, text = "Trailing null missing"}).
+
+decode_options([Key, Value | Strings]) ->
+ [{to_lower(Key), Value} | decode_options(Strings)];
+decode_options([]) ->
+ [].
+
+decode_error_code(Int) ->
+ case Int of
+ ?TFTP_ERROR_UNDEF -> undef;
+ ?TFTP_ERROR_ENOENT -> enoent;
+ ?TFTP_ERROR_EACCES -> eacces;
+ ?TFTP_ERROR_ENOSPC -> enospc;
+ ?TFTP_ERROR_BADOP -> badop;
+ ?TFTP_ERROR_BADBLK -> badblk;
+ ?TFTP_ERROR_EEXIST -> eexist;
+ ?TFTP_ERROR_BADUSER -> baduser;
+ ?TFTP_ERROR_BADOPT -> badopt;
+ Int when is_integer(Int), Int >= 0, Int =< 65535 -> Int;
+ _ -> exit(#tftp_msg_error{code = undef, text = "Error code outside range."})
+ end.
+
+%%-------------------------------------------------------------------
+%% Encode
+%%-------------------------------------------------------------------
+
+encode_msg(#tftp_msg_req{access = Access,
+ filename = Filename,
+ mode = Mode,
+ options = Options}) ->
+ OpCode = case Access of
+ read -> ?TFTP_OPCODE_RRQ;
+ write -> ?TFTP_OPCODE_WRQ
+ end,
+ [
+ <<OpCode:16/integer>>,
+ Filename,
+ 0,
+ Mode,
+ 0,
+ [[Key, 0, Val, 0] || {Key, Val} <- Options]
+ ];
+encode_msg(#tftp_msg_data{block_no = BlockNo, data = Data}) when BlockNo =< 65535 ->
+ [
+ <<?TFTP_OPCODE_DATA:16/integer, BlockNo:16/integer>>,
+ Data
+ ];
+encode_msg(#tftp_msg_ack{block_no = BlockNo}) when BlockNo =< 65535 ->
+ <<?TFTP_OPCODE_ACK:16/integer, BlockNo:16/integer>>;
+encode_msg(#tftp_msg_error{code = Code, text = Text}) ->
+ IntCode = encode_error_code(Code),
+ [
+ <<?TFTP_OPCODE_ERROR:16/integer, IntCode:16/integer>>,
+ Text,
+ 0
+ ];
+encode_msg(#tftp_msg_oack{options = Options}) ->
+ [
+ <<?TFTP_OPCODE_OACK:16/integer>>,
+ [[Key, 0, Val, 0] || {Key, Val} <- Options]
+ ].
+
+encode_error_code(Code) ->
+ case Code of
+ undef -> ?TFTP_ERROR_UNDEF;
+ enoent -> ?TFTP_ERROR_ENOENT;
+ eacces -> ?TFTP_ERROR_EACCES;
+ enospc -> ?TFTP_ERROR_ENOSPC;
+ badop -> ?TFTP_ERROR_BADOP;
+ badblk -> ?TFTP_ERROR_BADBLK;
+ eexist -> ?TFTP_ERROR_EEXIST;
+ baduser -> ?TFTP_ERROR_BADUSER;
+ badopt -> ?TFTP_ERROR_BADOPT;
+ Int when is_integer(Int), Int >= 0, Int =< 65535 -> Int
+ end.
+
+%%-------------------------------------------------------------------
+%% Miscellaneous
+%%-------------------------------------------------------------------
+
+replace_val(Key, Val, List) ->
+ case lists:keysearch(Key, 1, List) of
+ false ->
+ List ++ [{Key, Val}];
+ {value, {_, OldVal}} when OldVal =:= Val ->
+ List;
+ {value, {_, _}} ->
+ lists:keyreplace(Key, 1, List, {Key, Val})
+ end.
+
+to_lower(Chars) ->
+ [?LOWER(Char) || Char <- Chars].
diff --git a/lib/tftp/src/tftp_logger.erl b/lib/tftp/src/tftp_logger.erl
new file mode 100644
index 0000000000..a869958484
--- /dev/null
+++ b/lib/tftp/src/tftp_logger.erl
@@ -0,0 +1,99 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2016. 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%
+%%
+%%
+-module(tftp_logger).
+
+%%-------------------------------------------------------------------
+%% Interface
+%%-------------------------------------------------------------------
+
+%% public functions
+-export([
+ error_msg/2,
+ warning_msg/2,
+ info_msg/2
+ ]).
+
+-export([behaviour_info/1]).
+
+behaviour_info(callbacks) ->
+ [{error_msg, 2}, {warning_msg, 2}, {info_msg, 2}];
+behaviour_info(_) ->
+ undefined.
+
+%%-------------------------------------------------------------------
+%% error_msg(Format, Data) -> ok | exit(Reason)
+%%
+%% Format = string()
+%% Data = [term()]
+%% Reason = term()
+%%
+%% Log an error message
+%%-------------------------------------------------------------------
+
+error_msg(Format, Data) ->
+ {Format2, Data2} = add_timestamp(Format, Data),
+ error_logger:error_msg(Format2, Data2).
+
+%%-------------------------------------------------------------------
+%% warning_msg(Format, Data) -> ok | exit(Reason)
+%%
+%% Format = string()
+%% Data = [term()]
+%% Reason = term()
+%%
+%% Log a warning message
+%%-------------------------------------------------------------------
+
+warning_msg(Format, Data) ->
+ {Format2, Data2} = add_timestamp(Format, Data),
+ error_logger:warning_msg(Format2, Data2).
+
+%%-------------------------------------------------------------------
+%% info_msg(Format, Data) -> ok | exit(Reason)
+%%
+%% Format = string()
+%% Data = [term()]
+%% Reason = term()
+%%
+%% Log an info message
+%%-------------------------------------------------------------------
+
+info_msg(Format, Data) ->
+ {Format2, Data2} = add_timestamp(Format, Data),
+ io:format(Format2, Data2).
+
+%%-------------------------------------------------------------------
+%% Add timestamp to log message
+%%-------------------------------------------------------------------
+
+add_timestamp(Format, Data) ->
+ Time = erlang:timestamp(),
+ {{_Y, _Mo, _D}, {H, Mi, S}} = calendar:now_to_universal_time(Time),
+ %% {"~p-~s-~sT~s:~s:~sZ,~6.6.0w tftp: " ++ Format ++ "\n",
+ %% [Y, t(Mo), t(D), t(H), t(Mi), t(S), MicroSecs | Data]}.
+ {"~s:~s:~s tftp: " ++ Format, [t(H), t(Mi), t(S) | Data]}.
+
+%% Convert 9 to "09".
+t(Int) ->
+ case integer_to_list(Int) of
+ [Single] -> [$0, Single];
+ Multi -> Multi
+ end.
diff --git a/lib/tftp/src/tftp_sup.erl b/lib/tftp/src/tftp_sup.erl
new file mode 100644
index 0000000000..0475e53e42
--- /dev/null
+++ b/lib/tftp/src/tftp_sup.erl
@@ -0,0 +1,111 @@
+%%
+%% %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%
+%%
+%%
+%%----------------------------------------------------------------------
+%% Purpose: The top supervisor for tftp
+%%----------------------------------------------------------------------
+
+-module(tftp_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/1,
+ start_child/1,
+ stop_child/1,
+ which_children/0]).
+
+%% Supervisor callback
+-export([init/1]).
+
+%%%=========================================================================
+%%% API
+%%%=========================================================================
+
+start_link(TftpServices) ->
+ supervisor:start_link({local, ?MODULE}, ?MODULE, [TftpServices]).
+
+start_child(Options) ->
+ KillAfter = default_kill_after(),
+ ChildSpec = worker_spec(KillAfter, Options),
+ supervisor:start_child(?MODULE, ChildSpec).
+
+stop_child(Pid) when is_pid(Pid) ->
+ Children = supervisor:which_children(?MODULE),
+ case [Id || {Id, P, _Type, _Modules} <- Children, P =:= Pid] of
+ [] ->
+ {error, not_found};
+ [Id] ->
+ case supervisor:terminate_child(?MODULE, Id) of
+ ok ->
+ supervisor:delete_child(?MODULE, Id);
+ {error, not_found} ->
+ supervisor:delete_child(?MODULE, Id);
+ {error, Reason} ->
+ {error, Reason}
+ end
+ end.
+
+which_children() ->
+ Children = supervisor:which_children(?MODULE),
+ [{tftpd, Pid} || {_Id, Pid, _Type, _Modules} <- Children, Pid =/= undefined].
+
+%%%=========================================================================
+%%% Supervisor callback
+%%%=========================================================================
+
+init([Services]) when is_list(Services) ->
+ RestartStrategy = one_for_one,
+ MaxR = 10,
+ MaxT = 3600,
+ KillAfter = default_kill_after(),
+ Children = [worker_spec(KillAfter, Options) || {tftpd, Options} <- Services],
+ {ok, {{RestartStrategy, MaxR, MaxT}, Children}}.
+
+%%%=========================================================================
+%%% Internal functions
+%%%=========================================================================
+
+worker_spec(KillAfter, Options) ->
+ Modules = [proc_lib, tftp, tftp_engine],
+ KA = supervisor_timeout(KillAfter),
+ Name = unique_name(Options),
+ {Name, {tftp, start, [Options]}, permanent, KA, worker, Modules}.
+
+unique_name(Options) ->
+ case lists:keysearch(port, 1, Options) of
+ {value, {_, Port}} when is_integer(Port), Port > 0 ->
+ {tftpd, Port};
+ _ ->
+ {tftpd, erlang:unique_integer([positive])}
+ end.
+
+default_kill_after() ->
+ timer:seconds(3).
+
+%% supervisor_spec(Name) ->
+%% {Name, {Name, start, []}, permanent, infinity, supervisor,
+%% [Name, supervisor]}.
+
+-ifdef(debug_shutdown).
+supervisor_timeout(_KillAfter) -> timer:hours(24).
+-else.
+supervisor_timeout(KillAfter) -> KillAfter.
+-endif.
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 12:21:42 +0000