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diff --git a/lib/common_test/doc/src/ct_telnet.xml b/lib/common_test/doc/src/ct_telnet.xml new file mode 100644 index 0000000000..b7ba352104 --- /dev/null +++ b/lib/common_test/doc/src/ct_telnet.xml @@ -0,0 +1,601 @@ +<?xml version="1.0" encoding="utf-8" ?> +<!DOCTYPE erlref SYSTEM "erlref.dtd"> + +<erlref> + <header> + <copyright> + <year>2010</year><year>2012</year> + <holder>Ericsson AB. All Rights Reserved.</holder> + </copyright> + <legalnotice> + 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. + + </legalnotice> + + <title>ct_telnet</title> + <prepared></prepared> + <responsible></responsible> + <docno></docno> + <approved></approved> + <checked></checked> + <date></date> + <rev>A</rev> + <file>ct_telnet.xml</file> + </header> + <module>ct_telnet</module> + <modulesummary>Common Test specific layer on top of Telnet client ct_telnet_client.erl</modulesummary> + + <description> + + <p><c>Common Test</c> specific layer on top of Telnet client + <c>ct_telnet_client.erl</c>.</p> + + <p>Use this module to set up Telnet connections, send commands, and + perform string matching on the result. For information about how to use + <c>ct_telnet</c> and configure connections, specifically for UNIX hosts, + see the + <seealso marker="unix_telnet"><c>unix_telnet</c></seealso> manual page. + </p> + + <p>Default values defined in <c>ct_telnet</c>:</p> + <marker id="Default_values"/> + + <list type="bulleted"> + <item><p>Connection timeout (time to wait for connection) = 10 + seconds</p></item> + <item><p>Command timeout (time to wait for a command to return) = + 10 seconds</p></item> + <item><p>Max number of reconnection attempts = 3</p></item> + <item><p>Reconnection interval (time to wait in between + reconnection attempts) = 5 seconds</p></item> + <item><p>Keep alive (sends NOP to the server every 8 sec if + connection is idle) = <c>true</c></p></item> + <item><p>Polling limit (max number of times to poll to get a + remaining string terminated) = 0</p></item> + <item><p>Polling interval (sleep time between polls) = 1 second</p> + </item> + </list> + + <p>These parameters can be modified by the user with the following + configuration term:</p> + + <pre> + {telnet_settings, [{connect_timeout,Millisec}, + {command_timeout,Millisec}, + {reconnection_attempts,N}, + {reconnection_interval,Millisec}, + {keep_alive,Bool}, + {poll_limit,N}, + {poll_interval,Millisec}]}.</pre> + + <p><c>Millisec = integer(), N = integer()</c></p> + + <p>Enter the <c>telnet_settings</c> term in a configuration file included + in the test and <c>ct_telnet</c> retrieves the information + automatically.</p> + + <p><c>keep_alive</c> can be specified per connection, if necessary. For + details, see + <seealso marker="unix_telnet"><c>unix_telnet</c></seealso>.</p> + + </description> + + <section> + <title>Logging</title> + <marker id="Logging"/> + + <p>The default logging behavior of <c>ct_telnet</c> is to print information + about performed operations, commands, and their corresponding results to + the test case HTML log. The following is not printed to the HTML + log: text strings sent from the Telnet server that are not explicitly + received by a <c>ct_telnet</c> function, such as <c>expect/3</c>. + However, <c>ct_telnet</c> can be configured to use a special purpose + event handler, implemented in <c>ct_conn_log_h</c>, for logging + <em>all</em> Telnet traffic. To use this handler, install a <c>Common + Test</c> hook named <c>cth_conn_log</c>. Example (using the test suite + information function):</p> + + <pre> + suite() -> + [{ct_hooks, [{cth_conn_log, [{conn_mod(),hook_options()}]}]}].</pre> + + <p><c>conn_mod()</c> is the name of the <c>Common Test</c> module + implementing the connection protocol, that is, <c>ct_telnet</c>.</p> + + <p>The <c>cth_conn_log</c> hook performs unformatted logging of Telnet + data to a separate text file. All Telnet communication is captured and + printed, including any data sent from the server. The link to + this text file is located at the top of the test case HTML log.</p> + + <p>By default, data for all Telnet connections is logged in one common + file (named <c>default</c>), which can get messy, for example, if + multiple Telnet sessions are running in parallel. Therefore a separate + log file can be created for each connection. To configure this, use hook + option <c>hosts</c> and list the names of the servers/connections + to be used in the suite. The connections must be named for this to + work (see + <seealso marker="#open-1"><c>ct_telnet:open/1,2,3,4</c></seealso>).</p> + + <p>Hook option <c>log_type</c> can be used to change the + <c>cth_conn_log</c> behavior. The default value of this option is + <c>raw</c>, which results in the behavior described above. If the value + is set to <c>html</c>, all Telnet communication is printed to the test + case HTML log instead.</p> + + <p>All <c>cth_conn_log</c> hook options described can also be + specified in a configuration file with configuration variable + <c>ct_conn_log</c>.</p> + + <p><em>Example:</em></p> + + <pre> + {ct_conn_log, [{ct_telnet,[{log_type,raw}, + {hosts,[key_or_name()]}]}]}</pre> + + <note> + <p>Hook options specified in a configuration file overwrite any + hard-coded hook options in the test suite.</p> + </note> + + <marker id="Logging_example"/> + <p><em>Logging Example:</em></p> + + <p>The following <c>ct_hooks</c> statement causes printing of Telnet + traffic to separate logs for the connections <c>server1</c> and + <c>server2</c>. Traffic for any other connections is logged in the + default Telnet log.</p> + + <pre> + suite() -> + [{ct_hooks, + [{cth_conn_log, [{ct_telnet,[{hosts,[server1,server2]}]}]}]}].</pre> + + <p>As previously explained, this specification can also be provided by an + entry like the following in a configuration file:</p> + + <pre> + {ct_conn_log, [{ct_telnet,[{hosts,[server1,server2]}]}]}.</pre> + + <p>In this case the <c>ct_hooks</c> statement in the test suite can look + as follows:</p> + + <pre> + suite() -> + [{ct_hooks, [{cth_conn_log, []}]}].</pre> + </section> + + <section> + <title>Data Types</title> + <marker id="types"/> + <taglist> + <tag><c>connection() = handle() | {target_name(), connection_type()} | target_name()</c></tag> + <item><marker id="type-connection"/> + <p>For <c>target_name()</c>, see module + <seealso marker="ct"><c>ct</c></seealso>.</p></item> + + <tag><c>connection_type() = telnet | ts1 | ts2</c></tag> + <item><marker id="type-connection_type"/> </item> + + <tag><c>handle() = handle()</c></tag> + <item><marker id="type-handle"/> + <p>Handle for a specific Telnet connection, see module + <seealso marker="ct"><c>ct</c></seealso>.</p></item> + + <tag><c>prompt_regexp() = string()</c></tag> + <item><marker id="type-prompt_regexp"/> + <p>Regular expression matching all possible prompts for a specific + target type. <c>regexp</c> must not have any groups, that is, when + matching, <c>re:run/3</c> (in <c>STDLIB</c>) must return a list with + one single element.</p></item> + </taglist> + </section> + + <funcs> + <func> + <name>close(Connection) -> ok | {error, Reason}</name> + <fsummary>Closes the Telnet connection and stops the process managing + it.</fsummary> + <type> + <v>Connection = connection()</v> + <v>Reason = term()</v> + </type> + <desc><marker id="close-1"/> + <p>Closes the Telnet connection and stops the process managing it.</p> + + <p>A connection can be associated with a target name and/or a handle. + If <c>Connection</c> has no associated target name, it can only + be closed with the handle value (see + <seealso marker="#open-4"><c>ct_telnet:open/4</c></seealso>).</p> + </desc> + </func> + + <func> + <name>cmd(Connection, Cmd) -> {ok, Data} | {error, Reason}</name> + <fsummary>Equivalent to cmd(Connection, Cmd, []).</fsummary> + <desc><marker id="cmd-2"/> + <p>Equivalent to + <seealso marker="#cmd-3"><c>ct_telnet:cmd(Connection, Cmd, + [])</c></seealso>.</p> + </desc> + </func> + + <func> + <name>cmd(Connection, Cmd, Opts) -> {ok, Data} | {error, Reason}</name> + <fsummary>Sends a command through Telnet and waits for prompt.</fsummary> + <type> + <v>Connection = connection()</v> + <v>Cmd = string()</v> + <v>Opts = [Opt]</v> + <v>Opt = {timeout, timeout()} | {newline, boolean()}</v> + <v>Data = [string()]</v> + <v>Reason = term()</v> + </type> + <desc><marker id="cmd-3"/> + <p>Sends a command through Telnet and waits for prompt.</p> + + <p>By default, this function adds a new line to the end of the + specified command. If this is not desired, use option + <c>{newline,false}</c>. This is necessary, for example, when + sending Telnet command sequences prefixed with character + Interprete As Command (IAC).</p> + + <p>Option <c>timeout</c> specifies how long the client must wait + for prompt. If the time expires, the function returns + <c>{error,timeout}</c>. For information about the default value + for the command timeout, see the + <seealso marker="#Default_values">list of default values</seealso> + in the beginning of this module.</p> + </desc> + </func> + + <func> + <name>cmdf(Connection, CmdFormat, Args) -> {ok, Data} | {error, Reason}</name> + <fsummary>Equivalent to cmdf(Connection, CmdFormat, Args, []).</fsummary> + <desc><marker id="cmdf-3"/> + <p>Equivalent to + <seealso marker="#cmdf-4"><c>ct_telnet:cmdf(Connection, CmdFormat, + Args, [])</c></seealso>.</p> + </desc> + </func> + + <func> + <name>cmdf(Connection, CmdFormat, Args, Opts) -> {ok, Data} | {error, Reason}</name> + <fsummary>Sends a Telnet command and waits for prompt (uses a format + string and a list of arguments to build the command).</fsummary> + <type> + <v>Connection = connection()</v> + <v>CmdFormat = string()</v> + <v>Args = list()</v> + <v>Opts = [Opt]</v> + <v>Opt = {timeout, timeout()} | {newline, boolean()}</v> + <v>Data = [string()]</v> + <v>Reason = term()</v> + </type> + <desc><marker id="cmdf-4"/> + <p>Sends a Telnet command and waits for prompt (uses a format string + and a list of arguments to build the command).</p> + + <p>For details, see + <seealso marker="#cmd-3"><c>ct_telnet:cmd/3</c></seealso>.</p> + </desc> + </func> + + <func> + <name>expect(Connection, Patterns) -> term()</name> + <fsummary>Equivalent to expect(Connections, Patterns, []).</fsummary> + <desc><marker id="expect-2"/> + <p>Equivalent to + <seealso marker="#expect-3"><c>ct_telnet:expect(Connections, + Patterns, [])</c></seealso>.</p> + </desc> + </func> + + <func> + <name>expect(Connection, Patterns, Opts) -> {ok, Match} | {ok, MatchList, HaltReason} | {error, Reason}</name> + <fsummary>Gets data from Telnet and waits for the expected + pattern.</fsummary> + <type> + <v>Connection = connection()</v> + <v>Patterns = Pattern | [Pattern]</v> + <v>Pattern = string() | {Tag, string()} | prompt | {prompt, Prompt}</v> + <v>Prompt = string()</v> + <v>Tag = term()</v> + <v>Opts = [Opt]</v> + <v>Opt = {idle_timeout, IdleTimeout} | {total_timeout, TotalTimeout} | repeat | {repeat, N} | sequence | {halt, HaltPatterns} | ignore_prompt | no_prompt_check | wait_for_prompt | {wait_for_prompt, Prompt}</v> + <v>IdleTimeout = infinity | integer()</v> + <v>TotalTimeout = infinity | integer()</v> + <v>N = integer()</v> + <v>HaltPatterns = Patterns</v> + <v>MatchList = [Match]</v> + <v>Match = RxMatch | {Tag, RxMatch} | {prompt, Prompt}</v> + <v>RxMatch = [string()]</v> + <v>HaltReason = done | Match</v> + <v>Reason = timeout | {prompt, Prompt}</v> + </type> + <desc><marker id="expect-3"/> + <p>Gets data from Telnet and waits for the expected pattern.</p> + + <p><c>Pattern</c> can be a POSIX regular expression. The function + returns when a pattern is successfully matched (at least one, in + the case of multiple patterns).</p> + + <p><c>RxMatch</c> is a list of matched strings. It looks as + follows <c>[FullMatch, SubMatch1, SubMatch2, ...]</c>, where + <c>FullMatch</c> is the string matched by the whole regular + expression, and <c>SubMatchN</c> is the string that matched + subexpression number <c>N</c>. Subexpressions are denoted with + <c>(' ')</c> in the regular expression.</p> + + <p>If a <c>Tag</c> is speciifed, the returned <c>Match</c> also + includes the matched <c>Tag</c>. Otherwise, only <c>RxMatch</c> + is returned.</p> + + <p><em>Options:</em></p> + + <taglist> + <tag><c>idle_timeout</c></tag> + <item><p>Indicates that the function must return if the Telnet + client is idle (that is, if no data is received) for more than + <c>IdleTimeout</c> milliseconds. Default time-out is 10 + seconds.</p></item> + <tag><c>total_timeout</c></tag> + <item><p>Sets a time limit for the complete <c>expect</c> operation. + After <c>TotalTimeout</c> milliseconds, <c>{error,timeout}</c> + is returned. Default is <c>infinity</c> (that is, no time + limit).</p></item> + <tag><c>ignore_prompt | no_prompt_check</c></tag> + <item><p>>The function returns when a prompt is received, even if + no pattern has yet been matched, and + <c>{error,{prompt,Prompt}}</c> is returned. However, this + behavior can be modified with option <c>ignore_prompt</c> or + option <c>no_prompt_check</c>, which tells <c>expect</c> to + return only when a match is found or after a time-out.</p></item> + <tag><c>ignore_prompt</c></tag> + <item><p><c>ct_telnet</c> ignores any prompt found. This option is + useful if data sent by the server can include a pattern + matching prompt <c>regexp</c> (as returned by + <c>TargedMod:get_prompt_regexp/0</c>), but is not to not cause + the function to return.</p></item> + <tag><c>no_prompt_check</c></tag> + <item><p><c>ct_telnet</c> does not search for a prompt at all. This + is useful if, for example, <c>Pattern</c> itself matches the + prompt.</p></item> + <tag><c>wait_for_prompt</c></tag> + <item><p>Forces <c>ct_telnet</c> to wait until the prompt string + is received before returning (even if a pattern has already been + matched). This is equal to calling + <c>expect(Conn, Patterns++[{prompt,Prompt}], [sequence|Opts])</c>. + Notice that option <c>idle_timeout</c> and <c>total_timeout</c> + can abort the operation of waiting for prompt.</p></item> + <tag><c>repeat | repeat, N</c></tag> + <item><p>The pattern(s) must be matched multiple times. If <c>N</c> + is speciified, the pattern(s) are matched <c>N</c> times, and + the function returns <c>HaltReason = done</c>. This option can be + interrupted by one or more <c>HaltPatterns</c>. <c>MatchList</c> + is always returned, that is, a list of <c>Match</c> instead of + only one <c>Match</c>. Also <c>HaltReason</c> is returned.</p> + </item> + <tag><c>sequence</c></tag> + <item><p>All patterns must be matched in a sequence. A match is not + concluded until all patterns are matched. This option can be + interrupted by one or more <c>HaltPatterns</c>. <c>MatchList</c> + is always returned, that is, a list of <c>Match</c> instead of + only one <c>Match</c>. Also <c>HaltReason</c> is returned.</p> + </item> + </taglist> + + <p><em>Example 1:</em></p> + + <pre> + expect(Connection,[{abc,"ABC"},{xyz,"XYZ"}],[sequence,{halt,[{nnn,"NNN"}]}])</pre> + + <p>First this tries to match <c>"ABC"</c>, and then <c>"XYZ"</c>, but + if <c>"NNN"</c> appears, the function returns + <c>{error,{nnn,["NNN"]}}</c>. If both <c>"ABC"</c> and <c>"XYZ"</c> + are matched, the function returns <c>{ok,[AbcMatch,XyzMatch]}</c>.</p> + + <p><em>Example 2:</em></p> + + <pre> + expect(Connection,[{abc,"ABC"},{xyz,"XYZ"}],[{repeat,2},{halt,[{nnn,"NNN"}]}])</pre> + + <p>This tries to match <c>"ABC"</c> or <c>"XYZ"</c> twice. If + <c>"NNN"</c> appears, the function returns + <c>HaltReason = {nnn,["NNN"]}</c>.</p> + + <p>Options <c>repeat</c> and <c>sequence</c> can be combined to + match a sequence multiple times.</p> + </desc> + </func> + + <func> + <name>get_data(Connection) -> {ok, Data} | {error, Reason}</name> + <fsummary>Gets all data received by the Telnet client since the last + command was sent.</fsummary> + <type> + <v>Connection = connection()</v> + <v>Data = [string()]</v> + <v>Reason = term()</v> + </type> + <desc><marker id="get_data-1"/> + <p>Gets all data received by the Telnet client since the last + command was sent. Only newline-terminated strings are returned. + If the last received string has not yet been terminated, the + connection can be polled automatically until the string is + complete.</p> + + <p>The polling feature is controlled by the configuration values + <c>poll_limit</c> and <c>poll_interval</c> and is by default + disabled. This means that the function immediately returns all + complete strings received and saves a remaining non-terminated + string for a later <c>get_data</c> call.</p> + </desc> + </func> + + <func> + <name>open(Name) -> {ok, Handle} | {error, Reason}</name> + <fsummary>Equivalent to open(Name, telnet).</fsummary> + <desc><marker id="open-1"/> + <p>Equivalent to + <seealso marker="#open-2"><c>ct_telnet:open(Name, + telnet)</c></seealso>.</p> + </desc> + </func> + + <func> + <name>open(Name, ConnType) -> {ok, Handle} | {error, Reason}</name> + <fsummary>Opens a Telnet connection to the specified target + host.</fsummary> + <type> + <v>Name = target_name()</v> + <v>ConnType = connection_type()</v> + <v>Handle = handle()</v> + <v>Reason = term()</v> + </type> + <desc><marker id="open-2"/> + <p>Opens a Telnet connection to the specified target host.</p> + </desc> + </func> + + <func> + <name>open(KeyOrName, ConnType, TargetMod) -> {ok, Handle} | {error, Reason}</name> + <fsummary>Equivalent to open(KeyOrName, ConnType, TargetMod, []).</fsummary> + <desc><marker id="open-3"/> + <p>Equivalent to + <seealso marker="#open-4"><c>ct_telnet:ct_telnet:open(KeyOrName, + ConnType, TargetMod, [])</c></seealso>.</p> + </desc> + </func> + + <func> + <name>open(KeyOrName, ConnType, TargetMod, Extra) -> {ok, Handle} | {error, Reason}</name> + <fsummary>Opens a Telnet connection to the specified target + host.</fsummary> + <type> + <v>KeyOrName = Key | Name</v> + <v>Key = atom()</v> + <v>Name = target_name()</v> + <v>ConnType = connection_type()</v> + <v>TargetMod = atom()</v> + <v>Extra = term()</v> + <v>Handle = handle()</v> + <v>Reason = term()</v> + </type> + <desc><marker id="open-4"/> + <p>Opens a Telnet connection to the specified target host.</p> + + <p>The target data must exist in a configuration file. The connection + can be associated with <c>Name</c> and/or the returned <c>Handle</c>. + To allocate a name for the target, use one of the following + alternatives:</p> + + <list type="bulleted"> + <item><p><seealso marker="ct#require-2"><c>ct:require/2</c></seealso> + in a test case</p></item> + <item><p>A <c>require</c> statement in the suite information + function (<c>suite/0</c>)</p></item> + <item><p>A <c>require</c> statement in a test case information + function</p></item> + </list> + + <p>If you want the connection to be associated with <c>Handle</c> only + (if you, for example, need to open multiple connections to a host), + use <c>Key</c>, the configuration variable name, to specify the + target. Notice that a connection without an associated target name + can only be closed with the <c>Handle</c> value.</p> + + <p><c>TargetMod</c> is a module that exports the functions + <c>connect(Ip, Port, KeepAlive, Extra)</c> and + <c>get_prompt_regexp()</c> for the specified <c>TargetType</c> + (for example, <c>unix_telnet</c>).</p> + + <p>For <c>target_name()</c>, see module + <seealso marker="ct"><c>ct</c></seealso>.</p> + + <p>See also + <seealso marker="ct#require-2"><c>ct:require/2</c></seealso>.</p> + </desc> + </func> + + <func> + <name>send(Connection, Cmd) -> ok | {error, Reason}</name> + <fsummary>Equivalent to send(Connection, Cmd, []).</fsummary> + <desc><marker id="send-2"/> + <p>Equivalent to + <seealso marker="#send-3"><c>ct_telnet:send(Connection, Cmd, + [])</c></seealso>.</p> + </desc> + </func> + + <func> + <name>send(Connection, Cmd, Opts) -> ok | {error, Reason}</name> + <fsummary>Sends a Telnet command and returns immediately.</fsummary> + <type> + <v>Connection = connection()</v> + <v>Cmd = string()</v> + <v>Opts = [Opt]</v> + <v>Opt = {newline, boolean()}</v> + <v>Reason = term()</v> + </type> + <desc><marker id="send-3"/> + <p>Sends a Telnet command and returns immediately.</p> + + <p>By default, this function adds a newline to the end of the + specified command. If this is not desired, option + <c>{newline,false}</c> can be used. This is necessary, for example, + when sending Telnet command sequences prefixed with character + Interprete As Command (IAC).</p> + + <p>The resulting output from the command can be read with + <seealso marker="#get_data-1"><c>ct_telnet:get_data/2</c></seealso> or + <seealso marker="#expect-2"><c>ct_telnet:expect/2,3</c></seealso>.</p> + </desc> + </func> + + <func> + <name>sendf(Connection, CmdFormat, Args) -> ok | {error, Reason}</name> + <fsummary>Equivalent to sendf(Connection, CmdFormat, Args, []).</fsummary> + <desc><marker id="sendf-3"/> + <p>Equivalent to + <seealso marker="#sendf-4"><c>ct_telnet:sendf(Connection, CmdFormat, + Args, [])</c></seealso>.</p> + </desc> + </func> + + <func> + <name>sendf(Connection, CmdFormat, Args, Opts) -> ok | {error, Reason}</name> + <fsummary>Sends a Telnet command and returns immediately (uses a format + string and a list of arguments to build the command).</fsummary> + <type> + <v>Connection = connection()</v> + <v>CmdFormat = string()</v> + <v>Args = list()</v> + <v>Opts = [Opt]</v> + <v>Opt = {newline, boolean()}</v> + <v>Reason = term()</v> + </type> + <desc><marker id="sendf-4"/> + <p>Sends a Telnet command and returns immediately (uses a format + string and a list of arguments to build the command).</p> + </desc> + </func> + </funcs> + + <section> + <title>See Also</title> + <p><seealso marker="unix_telnet"><c>unix_telnet</c></seealso></p> + </section> + +</erlref> + + |