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* anders/diameter/5014/OTP-11946:
Fix handling of AVP length errors (5014) in unknown AVPs
Add testcases that send unknown AVPs with a bad AVP Length
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* anders/diameter/hardening/OTP-11721:
Simplify example server
Make example server answer unsupported requests with 3001
Make example code quiet
Don't count messages on arbitrary keys
Replace traffic-related log reports with no-op function calls
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Commit 4ce2d3a6 added the insertion of a single bit into binary AVP data
to induce an encode error in the case of a header length that pointed
past the available bytes: a 5014 = DIAMETER_INVALID_AVP_LENGTH error.
Commit 838856b fixed this for stringish Diameter types, but both commits
neglected the case in which the offending AVP isn't known to the
dictionary in question. Unless the AVP was regarded as erroneous for
other reasons (eg. an M-bit resulting in 5001) it would be happily be
packed into an 'AVP' field. If it was regarded as an error, the record
could be passed back to diameter_codec:pack_avp/1, and if the record
contained header data then there was no clause to deal with the
unpleasantry.
Deal with it by having the dictionary module strip the extra bit and
flag the AVP as 5014, and by having diameter_codec handle any extra bit
coming from an dictionary compiled against an old diameter_gen. An old
dictionary won't detect 5014 however, so dictionaries should be
recompiled.
Change most of the guards in diameter_codec from is_bitstring/1 to
is_binary/1. What's being passed to the decode functions are binaries
received other the network. The only case in which a non-binary
bitstring is when we've placed an extra bit there ourselves. (Modulo
someone doing something they shouldn't.)
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In particular, a length that points past the end of the message. This
goes undetected there is some other problem with the AVP (eg. M-bit),
which is a problem we're about to fix.
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In particular, remove the unnecessary list-or-record answer.
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As it should. The previous discard (surely) pre-dated being able to
return {answer_message, 3001} from a handle_request callback.
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The output could make it impossible to use the shell. Counters returned
diameter:service_info/2 can be used to check for expected happenings.
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That is, don't use a key constructed from an incoming Diameter header
unless the message is known to the dictionary in question. Otherwise
there are 2^32 application ids, 2^24 command codes, and 2 R-bits for an
ill-willed peer to choose from, each resulting in new keys in the
counter table (diameter_stats).
The usual {ApplicationId, CommandCode, Rbit} in a key is replaced by the
atom 'unknown' if the message in question is unknown to the decoding
dictionary.
Counters for messages sent and received by a relay are (still) not
implemented.
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The former were a little over-enthusiastic and could cause a node to be
logged to death if a peer Diameter node was sufficiently ill-willed.
The function calls are to diameter_lib:log/4, the arguments of which
identify the happening in question, and which does nothing but provide a
function to trace on. Many existing log calls have been shrunk.
The only remaining traffic-related report (hopefully) is that resulting
from {answer_errors, report} config, and this has been slimmed.
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* anders/diameter/dpr/OTP-11938:
Ensure watchdog dies with transport if DPA was sent
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* anders/diameter/sctp/OTP-11901:
Fix diameter_sctp function_clause
Anchor path regexps in examples suite
Run examples suite over both TCP and SCTP
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* anders/diameter/rc_counters/OTP-11937:
Count encode errors in outgoing messages
Count decode errors in incoming requests
Count decode errors independently of result codes
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* anders/diameter/rc_counters/OTP-11891:
Count result codes in CEA/DWA/DPA
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* anders/diameter/watchdog_leak/OTP-11934:
Simplify sending of 'close' to watchdog
Fix watchdog table leak
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* anders/diameter/request_leak/OTP-11893:
Fix leaking request table
Add check that request table is empty to failover suite
Comment fix
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Introduced in commit ed6395a6. The {stream, Id} transport_data set upon
reception is passed back to us by default when receiving the answer to a
request message, so even capabilities exchange failed.
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They match emacs backup files and more without the anchor, although this
doesn't stop the matches from finding files the suite isn't (yet)
intended to test: files under development, not yet commited, etc.
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This was supposed to already be the case (in what passes for my memory),
and detects that commit ed6395a6 is horrifically broken: diameter is
unable to send CEA over SCTP.
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A DPR/DPA exchange should always cause the watchdog process in question
to die with the transport, so that a subsequent connection with the same
peer doesn't result in a 3 x DWR/DWA exchange. Commit 5903d6db saw to
this for the sending of DPR but neglected the corresponding problem for
DPA.
In the case of sending DPR (the aforementioned commit), note that
there's no distinction between receiving DPA as expected and not: the
watchdog dies with the transport regardless.
diameter_watchdog must be loaded first at upgrade.
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Only decode errors were counted previously. Keys are of the form
{Id, send, error}, where Id is:
{ApplicationId, CommandCode, Rbit} | unknown
The latter will be the case if not even a #diameter_header{} can be
constructed.
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Errors were only counted in incoming answers. Counters are keyed on
tuples of the same form:
{{ApplicationId, CommandCode, Rbit}, recv, error}
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Since the former doesn't exclude the latter.
Counter values are returned by diameter:service_info/2. They can
currently only be retrieved for a service, not for individual transports
or peer connections.
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Corresponding counters for other answer messages have been counted
previously, but those for CEA, DWA, and DPA have been missing since
diameter itself sends these messages and the implementation is as bit
more separate than it might be. The counters are keyed on values of the
following form.
{{ApplicationId, CommandCode, 0 = Rbit}, send|recv, {'Result-Code', RC}}
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There's no need to send the message immediately if there's no transport
configuration since that in itself means the service process will tell
the watchdogs to die.
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Commit ef5fddcb (diameter-1.4.1, R16B) caused the leak in the case of an
accepting watchdog with restrict_connections = false. It (correctly)
ensured the state remained at INITIAL but a subsequent 'close' message
to terminate the process was ignored since the state was not DOWN. In
fact, no 'close' was sent since there was no state transition or
previous connection: the former triggers the message from
diameter_service, the latter from diameter_watchdog. The message is now
sent to self() from the watchdog itself.
Send 'close' in the same way when multiple connections to the same peer
are allowed, to avoid waiting for a watchdog timer expiry for the
process to terminate in this case.
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A new connection writes the pid to the table diameter_request. The
normal handling is that loss of a connection leads to a watchdog state
change in the service process, which removes the entry, but this usually
won't happen in the case of diameter:stop_service/1 since the service
process is terminated without waiting for watchdog transitions.
The request table should really be service-specific, so that the table
is deleted when the service is stopped, which requires passing the table
identifier into request processes and handling that the table may not
exist. Just clear out the service-specific entries at service process
termination for now.
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The way in which this suite causes transport connections to be broken -
by stopping the service - makes it prone to orphaning entries in the
request table, which is a bug we're about to fix.
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* anders/diameter/17.0_release/OTP-11605:
Fix diameter.hrl comment typos
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A Diameter Header Command Code is 24 bits, not 8, and an Application-ID
is 32 bits, not 24.
Thanks to Austin Aigbe for pointing it out.
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* anders/diameter/17.0_release/OTP-11605:
Bring diameter_dbg into the present
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The module is just a collection of functions for retrieving or printing
information for the purpose of debugging. Various changes over several
releases had broken the table-listing functions diameter_peer/0 and
diameter_service/0. Add some minor tidying as well.
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* anders/diameter/17.0_release/OTP-11825:
Simplify xref tests in app suite
Add app suite test for app file runtime_dependencies
Generate runtime_dependencies in app file
Remove syntax_tools and runtime_tools from app file
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By examining which modules *use* runtime and compiler modules instead of
which modules compiler modules call. Note that the semantics are changed
somewhat: we will now fail if diameter modules are called from an
application which diameter.app lists as a start dependency, which wasn't
the case previously.
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In particular, that modules listed in the 'modules' tuple only call
modules in other applications listed in the 'runtime_dependencies'
tuple.
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To avoid having to specify applications more than once.
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* anders/diameter/unicode_path/OTP-11655:
Fix unicode path failure in diameter_make:codec/2
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* anders/diameter/unicode/OTP-11686:
Use fun encoding to erl_parse:abstract/2
Adapt dictionary compilation to new default encoding
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* anders/diameter/pick_peer/OTP-11789:
Fix pick_peer case clause failure
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The former is used by the dictionary compiler, the latter by some
unfinished code in diameter_dbg. None of the corresponding modules are
included in the app file since they typically aren't needed/wanted on a
target system.
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* anders/diameter/17.0_release/OTP-11605:
Move info modules into own subdirectory
Include compiler and info modules in app file
Remove unused diameter_dbg:log/4
Remove case expecting a pre-R16B return value from os:type/1
Fix doc typo: required -> requires
Remove release note unrelated to functionality
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Possibly overkill for two modules but it mirrors their different
treatment by the makefile.
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Albeit as comments. This is just to make it more obvious that these
aren't include in the modules list, since they typically aren't
needed/wanted on a target system. Also add comments for the
corresponding dependencies on syntax_tools and runtime_tools, as well as
the optional runtime dependency on ssl.
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It was intended to replace diameter_lib:log/4 at some point but that was
a bad idea since diameter_dbg isn't included in the app file.
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The documented return value changed in commit c37a9761.
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This is an encoding that didn't exist at the time of the previous
commit, but which was added in commit 83b6daef. Use it to restrict
stringification to lists containing printable ascii.
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The problem is that the change in default encoding to utf8 in 17.0, in
commit 00e42967, changes the behaviour of erl_parse:abstract/1, which is
used by the dictionary compiler to turn terms into abstract code. In
particular, it transforms the orddict representation of a parsed
dictionary to contruct the return value of a dictionary module's dict/0
function. This orddict contains various lists, one of which is a list of
tuples of the form
{Name, Code, [VendorId], [Avp]}
where Name is an ASCII string and VendorId is a non-negative integer.
Using erl_parse:abstract/2 instead allows a string encoding to be
specified but regardless of what encoding is used, the result of
transforming our tuple might not be what we really want, which is for
Name to always be represented as a string form and [VendorId] to always
be represented as a cons form: the [VendorId] will always end up as a
string form if the integers are small enough. The only way around this
is to transform the tuple bit by bit, but modifying the code to do this
is quite a lot of work, for not much gain: it would be nice to produce
more readable output but nothing stops working without it.
This commit restores the pre-17.0 conversion by explicilty specifying
latin1 as the string encoding to erl_parse:abstract/2. The utf8 encoding
broke the compilation of some dictionares since unicode strings aren't
expected when writing the generated code to file.
Note that the latin1 encoding does reasonably well in practice, although
it mangles the Ericsson Vendor Id list [193] into a "LATIN CAPITAL
LETTER A WITH ACUTE". The utf8 encoding does worse, mangling the 3GPP
Vendor Id 10415 into "DESERET CAPITAL LETTER CHEE". An ascii encoding
would do better than latin1 but doesn't yet exist. (Encoding isn't
really what the option is. It's a string predicate: if the predicate is
true then represent as a string form, otherwise a cons form.)
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