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NAME
ct_snmp - Common Test user interface module for the OTP snmp application.
DESCRIPTION
Common Test user interface module for the OTP snmp application
The purpose of this module is to make snmp configuration easier for the test case writer. Many test cases
can use default values for common operations and then no snmp configuration files need to be supplied.
When it is necessary to change particular configuration parameters, a subset of the relevant snmp
configuration files may be passed to ct_snmp by means of Common Test configuration files. For more
specialized configuration parameters, it is possible to place a "simple snmp configuration file" in the
test suite data directory. To simplify the test suite, Common Test keeps track of some of the snmp
manager information. This way the test suite doesn't have to handle as many input parameters as it would
if it had to interface the OTP snmp manager directly.
The following snmp manager and agent parameters are configurable:
{snmp,
%%% Manager config
[{start_manager, boolean()} % Optional - default is true
{users, [{user_name(), [call_back_module(), user_data()]}]}, %% Optional
{usm_users, [{usm_user_name(), [usm_config()]}]},%% Optional - snmp v3 only
% managed_agents is optional
{managed_agents,[{agent_name(), [user_name(), agent_ip(), agent_port(), [agent_config()]]}]},
{max_msg_size, integer()}, % Optional - default is 484
{mgr_port, integer()}, % Optional - default is 5000
{engine _id, string()}, % Optional - default is "mgrEngine"
%%% Agent config
{start_agent, boolean()}, % Optional - default is false
{agent_sysname, string()}, % Optional - default is "ct_test"
{agent_manager_ip, manager_ip()}, % Optional - default is localhost
{agent_vsns, list()}, % Optional - default is [v2]
{agent_trap_udp, integer()}, % Optional - default is 5000
{agent_udp, integer()}, % Optional - default is 4000
{agent_notify_type, atom()}, % Optional - default is trap
{agent_sec_type, sec_type()}, % Optional - default is none
{agent_passwd, string()}, % Optional - default is ""
{agent_engine_id, string()}, % Optional - default is "agentEngine"
{agent_max_msg_size, string()},% Optional - default is 484
%% The following parameters represents the snmp configuration files
%% context.conf, standard.conf, community.conf, vacm.conf,
%% usm.conf, notify.conf, target_addr.conf and target_params.conf.
%% Note all values in agent.conf can be altered by the parametes
%% above. All these configuration files have default values set
%% up by the snmp application. These values can be overridden by
%% suppling a list of valid configuration values or a file located
%% in the test suites data dir that can produce a list
%% of valid configuration values if you apply file:consult/1 to the
%% file.
{agent_contexts, [term()] | {data_dir_file, rel_path()}}, % Optional
{agent_community, [term()] | {data_dir_file, rel_path()}},% Optional
{agent_sysinfo, [term()] | {data_dir_file, rel_path()}}, % Optional
{agent_vacm, [term()] | {data_dir_file, rel_path()}}, % Optional
{agent_usm, [term()] | {data_dir_file, rel_path()}}, % Optional
{agent_notify_def, [term()] | {data_dir_file, rel_path()}},% Optional
{agent_target_address_def, [term()] | {data_dir_file, rel_path()}},% Optional
{agent_target_param_def, [term()] | {data_dir_file, rel_path()}},% Optional
]}.
The MgrAgentConfName parameter in the functions should be a name you allocate in your test suite using a
require statement. Example (where MgrAgentConfName = snmp_mgr_agent):
suite() -> [{require, snmp_mgr_agent, snmp}].
or
ct:require(snmp_mgr_agent, snmp).
Note that Usm users are needed for snmp v3 configuration and are not to be confused with users.
Snmp traps, inform and report messages are handled by the user callback module. For more information
about this see the snmp application.
Note: It is recommended to use the .hrl-files created by the Erlang/OTP mib-compiler to define the oids.
Example for the getting the erlang node name from the erlNodeTable in the OTP-MIB:
Oid = ?erlNodeEntry ++ [?erlNodeName, 1]
It is also possible to set values for snmp application configuration parameters, such as config, server,
net_if, etc (see the "Configuring the application" chapter in the OTP snmp User's Guide for a list of
valid parameters and types). This is done by defining a configuration data variable on the following
form:
{snmp_app, [{manager, [snmp_app_manager_params()]},
{agent, [snmp_app_agent_params()]}]}.
A name for the data needs to be allocated in the suite using require (see example above), and this name
passed as the SnmpAppConfName argument to start/3. ct_snmp specifies default values for some snmp
application configuration parameters (such as {verbosity,trace} for the config parameter). This set of
defaults will be merged with the parameters specified by the user, and user values override ct_snmp
defaults.
DATA TYPES
agent_config() = {Item, Value}:
agent_ip() = ip():
agent_name() = atom():
agent_port() = integer():
call_back_module() = atom():
error_index() = integer():
error_status() = noError | atom():
ip() = string() | {integer(), integer(), integer(), integer()}:
manager_ip() = ip():
oid() = [byte()]:
oids() = [oid()]:
rel_path() = string():
sec_type() = none | minimum | semi:
snmp_app_agent_params() = term():
snmp_app_manager_params() = term():
snmpreply() = {error_status(), error_index(), varbinds()}:
user_data() = term():
user_name() = atom():
usm_config() = {Item, Value}:
usm_user_name() = string():
value_type() = o('OBJECT IDENTIFIER') | i('INTEGER') | u('Unsigned32') | g('Unsigned32') | s('OCTET
STRING'):
var_and_val() = {oid(), value_type(), value()}:
varbind() = term():
varbinds() = [varbind()]:
varsandvals() = [var_and_val()]:
EXPORTS
get_next_values(Agent, Oids, MgrAgentConfName) -> SnmpReply
Types:
Agent = agent_name()
Oids = oids()
MgrAgentConfName = atom()
SnmpReply = snmpreply()
Issues a synchronous snmp get next request.
get_values(Agent, Oids, MgrAgentConfName) -> SnmpReply
Types:
Agent = agent_name()
Oids = oids()
MgrAgentConfName = atom()
SnmpReply = snmpreply()
Issues a synchronous snmp get request.
load_mibs(Mibs) -> ok | {error, Reason}
Types:
Mibs = [MibName]
MibName = string()
Reason = term()
Load the mibs into the agent 'snmp_master_agent'.
register_agents(MgrAgentConfName, ManagedAgents) -> ok | {error, Reason}
Types:
MgrAgentConfName = atom()
ManagedAgents = [agent()]
Reason = term()
Explicitly instruct the manager to handle this agent. Corresponds to making an entry in
agents.conf This function will try to register the given managed agents, without checking if any
of them already exist. In order to change an already registered managed agent, the agent must
first be unregistered.
register_users(MgrAgentConfName, Users) -> ok | {error, Reason}
Types:
MgrAgentConfName = atom()
Users = [user()]
Reason = term()
Register the manager entity (=user) responsible for specific agent(s). Corresponds to making an
entry in users.conf. This function will try to register the given users, without checking if any
of them already exist. In order to change an already registered user, the user must first be
unregistered.
register_usm_users(MgrAgentConfName, UsmUsers) -> ok | {error, Reason}
Types:
MgrAgentConfName = atom()
UsmUsers = [usm_user()]
Reason = term()
Explicitly instruct the manager to handle this USM user. Corresponds to making an entry in
usm.conf This function will try to register the given users, without checking if any of them
already exist. In order to change an already registered user, the user must first be unregistered.
set_info(Config) -> [{Agent, OldVarsAndVals, NewVarsAndVals}]
Types:
Config = [{Key, Value}]
Agent = agent_name()
OldVarsAndVals = varsandvals()
NewVarsAndVals = varsandvals()
Returns a list of all successful set requests performed in the test case in reverse order. The
list contains the involved user and agent, the value prior to the set and the new value. This is
intended to facilitate the clean up in the end_per_testcase function i.e. the undoing of the set
requests and its possible side-effects.
set_values(Agent, VarsAndVals, MgrAgentConfName, Config) -> SnmpReply
Types:
Agent = agent_name()
Oids = oids()
MgrAgentConfName = atom()
Config = [{Key, Value}]
SnmpReply = snmpreply()
Issues a synchronous snmp set request.
start(Config, MgrAgentConfName) -> ok
Equivalent to start(Config, MgrAgentConfName, undefined).
start(Config, MgrAgentConfName, SnmpAppConfName) -> ok
Types:
Config = [{Key, Value}]
Key = atom()
Value = term()
MgrAgentConfName = atom()
SnmpConfName = atom()
Starts an snmp manager and/or agent. In the manager case, registrations of users and agents as
specified by the configuration MgrAgentConfName will be performed. When using snmp v3 also so
called usm users will be registered. Note that users, usm_users and managed agents may also be
registered at a later time using ct_snmp:register_users/2, ct_snmp:register_agents/2, and
ct_snmp:register_usm_users/2. The agent started will be called snmp_master_agent. Use
ct_snmp:load_mibs/1 to load mibs into the agent. With SnmpAppConfName it's possible to configure
the snmp application with parameters such as config, mibs, net_if, etc. The values will be merged
with (and possibly override) default values set by ct_snmp.
stop(Config) -> ok
Types:
Config = [{Key, Value}]
Key = atom()
Value = term()
Stops the snmp manager and/or agent removes all files created.
unload_mibs(Mibs) -> ok | {error, Reason}
Types:
Mibs = [MibName]
MibName = string()
Reason = term()
Unload the mibs from the agent 'snmp_master_agent'.
unregister_agents(MgrAgentConfName) -> ok
Types:
MgrAgentConfName = atom()
Reason = term()
Unregister all managed agents.
unregister_agents(MgrAgentConfName, ManagedAgents) -> ok
Types:
MgrAgentConfName = atom()
ManagedAgents = [agent_name()]
Reason = term()
Unregister the given managed agents.
unregister_users(MgrAgentConfName) -> ok
Types:
MgrAgentConfName = atom()
Reason = term()
Unregister all users.
unregister_users(MgrAgentConfName, Users) -> ok
Types:
MgrAgentConfName = atom()
Users = [user_name()]
Reason = term()
Unregister the given users.
unregister_usm_users(MgrAgentConfName) -> ok
Types:
MgrAgentConfName = atom()
Reason = term()
Unregister all usm users.
unregister_usm_users(MgrAgentConfName, UsmUsers) -> ok
Types:
MgrAgentConfName = atom()
UsmUsers = [usm_user_name()]
Reason = term()
Unregister the given usm users.
AUTHORS
<>
common_test 1.7.4 ct_snmp(3erl)