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Both diameter_tcp and diameter_sctp are susceptible to deadlock since a
peer that blocks send also prevents additional messages from being
received. Send from a process that's paired with the transport process
to avoid this. Use the existing monitor process in the TCP case, add one
in the SCTP case.
This has been the reason for many sporadic testcase failures, mostly in
diameter_traffic_SUITE.
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* maint:
Update copyright-year
Conflicts:
lib/dialyzer/src/dialyzer.hrl
lib/dialyzer/src/dialyzer_options.erl
lib/dialyzer/test/opaque_SUITE_data/src/recrec/dialyzer.hrl
lib/dialyzer/test/opaque_SUITE_data/src/recrec/dialyzer_races.erl
lib/hipe/icode/hipe_icode.erl
lib/hipe/main/hipe.erl
lib/hipe/main/hipe.hrl.src
lib/hipe/main/hipe_main.erl
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* anders/diameter/19.1/OTP-13838:
vsn -> 1.12.1
Update appup for 19.1
Fix xmllint errors in documentation
Remove documentation overkill
Don't run traffic tests in parallel when {string_decode, true}
Remove copyright from generated dictionary modules
Fix dictionary function typo
Fix dictionary typo in relay example
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The SCPT stack has a different behavior in solaris2.10 then in later versions
and linux. Diameter implementation does not support this behavior.
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Since the large strings copied between processes cause testcases to fail
randomly.
Option string_decode was added in commit 1590920c.
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* anders/diameter/rand/OTP-13664:
Use rand(3) instead of random(3)
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That missed comm_up when something like the following was received on
FreeBSD (for one):
{sctp,#Port<0.599>,
{127,0,0,1},
45455,
{[{sctp_sndrcvinfo,0,0,[],0,0,0,0,145060462,3}],
{sctp_assoc_change,comm_up,0,10,10,3}}}
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The latter is deprecated in OTP 19.
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Listening transports weren't removed, which diameter_reg:subs/0 revealed.
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The transport interface documented in diameter_transport(3) is used to
start/stop accepting/connecting transport processes: they're started
with a function call, and told to die with their parent process. In the
accepting case, both diameter_tcp and diameter_sctp start a listening
process when the first accepting transport is started. However, there's
no way for a listening process to find out that that it should stop
listening when transport configuration is removed.
Both diameter_tcp and diameter_sctp have used a timer to terminate the
listening process after all existing accepting processes have died as a
consequence of transport removal. The problem with this is that nothing
stops a new client from connecting before this, and also that no new
transport can succeed in opening the same listening port (eg.
reconfiguration) until the old listener dies.
This commit solves the problem by adding diameter_reg:subscribe/2, to
allow callers to subscribe to messages about added/removed associations.
A call to diameter:add_transport/2 results in a new child process that
registers a term that a listening process subscribes to. Transport
removal results in the death of the child, and the resulting
notification to the listener causes the latter to close its socket and
terminate.
This is still an internal interface, but the subscription mechanism
should probably be made external (eg. a diameter:subscribe/1 that can
be used to subscribe to specified messages), so that transport modules
other than diameter's own can make use of it. There is no support for
soft upgrade.
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Letters are cheap.
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Unused, and in the way for what's to come.
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* anders/diameter/test/OTP-13438:
Don't assume list comprehension evaluation order
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Each service process maintains a dictionary of peers, mapping an
application alias to a {pid(), #diameter_caps{}} list of connected
peers. These lists are potentially large, peers were appended to the end
of the list for no particular reason, and these long lists were
constructed/deconstructed when filtering them for pick_peer callbacks.
Many simultaneous outgoing request could then slow the VM to a crawl,
with many scheduled processes mired in list manipulation.
The pseudo-dicts are now replaced by plain ets tables. The reason for
them was (once upon a time) to have an interface interchangeable with a
plain dict for debugging purposes, but strict swapablity hasn't been the
case for some time now, and in practice a swap has never taken place.
Additional tables mapping Origin-Host/Realm have also been introduced,
to minimize the size of the peers lists when peers are filtered on
host/realm. For example, a filter like
{any, [{all, [realm, host]}, realm]}
is probably a very common case: preferring a Destination-Realm/Host
match before falling back on Destination-Realm alone. This is now more
efficiently (but not equivalently) expressed as
{first, [{all, [realm, host]}, realm]}
to stop the search when the best match is made, and extracts peers from
host/realm tables instead of searching through the list of all peers
supporting the application in question. The code to try and start with a
lookup isn't exhaustive, and the 'any' filter is still as inefficient as
previously.
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The diffs are all about adapting to the OTP 18 time interface. The code
was previously backwards compatible, falling back on the erlang:now/0 if
erlang:monotonic_time/0 is unavailable, but this was seen to be a bad
thing in commit 9c0f2f2c. Use of erlang:now/0 is now removed.
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* anders/diameter/17/time/OTP-12926:
Simplify time manipulation
Remove use of monotonic time in pre-18 code
Remove unnecessary redefinition of erlang:max/2
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* anders/diameter/grouped_errors/OTP-12930:
Fix decode of Grouped AVPs containing errors
Simplify logic
Simplify logic
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* anders/diameter/lcnt/OTP-12912:
Make ets diameter_stats a set
Remove unnecessary sorting in stats suite
Set ets {write_concurrency, true} on diameter_stats
Don't start watchdog timers unnecessarily
Remove unnecessary erlang:monitor/2 qualification
Add missing watchdog suite clause
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The ordering of (ets) diameter_stats (also unnecessary) ensures the
sorting.
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By doing away with more wrapping that the parent commit started to
remove.
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Commit c74b593a fixed the problem that a decoded deep diameter_avp list
couldn't be encoded, but did so in the wrong way: there's no need to
reencode component AVPs since the Grouped AVP itself already contains
the encoded binary. The blunder caused diameter_codec:pack_avp/1 to fail
if the first element of the AVP list to be encoded was itself a list.
Thanks to Andrzej Trawiński for reporting the problem.
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The suite pretends to be gen_tcp-ish in configuring itself to
diameter_tcp. The function close/1 can be called as a result.
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OTP-12845
* bruce/change-license:
fix errors caused by changed line numbers
Change license text to APLv2
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* anders/diameter/sctp/OTP-12768:
Fix connection timeouts in test transports
Fix start order of alternate transports
Log discarded answers
Ensure accepting processes are first in, first out
Remove upgrade-related code
Be less parallel in traffic suite
Increase send/receive buffers for testsuite SCTP listeners
Decrease unnecessarily long testsuite timetraps
Simplify accepting transport start
Simplify peeloff signaling
Simplify socket close at terminate
Don't monitor listener after peeloff
Don't receive initial messages out of order
Remove assumption that SCTP association ids will be unique
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* anders/diameter/grouped_errors/OTP-12721:
Fix decode of Grouped AVPs containing errors
Simplify logic
Simplify logic
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Without a timeout, TCP/SCTP connect can take some time to fail, which
resulted in failures in the pool suite after the parent commit fixed the
previously faulty sctp-first-then-tcp connect.
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At the current count, there are 128 groups run in parallel, each of
which runs 52 testcases in parallel. That makes for 128*52 = 6656
testcases, which is probably also a factor in the sporadic failures
addressed by the parent commit. Don't run the 128 groups in parallel.
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The defaults result in sporadic timeouts in the traffic suite after
testing over SCTP was added in commit fadf753b. The behaviour looks to
be specific to SLES 11, and is presumably the same resends/congestion
that lead to the buffers being increased in the gen_sctp suite in commit
12febf13 (and commented in commit e931991f). The behaviour hasn't been
seen on SLES 10.
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RFC 6733 says this of Failed-AVP in 7.5:
In the case where the offending AVP is embedded within a Grouped AVP,
the Failed-AVP MAY contain the grouped AVP, which in turn contains
the single offending AVP. The same method MAY be employed if the
grouped AVP itself is embedded in yet another grouped AVP and so on.
In this case, the Failed-AVP MAY contain the grouped AVP hierarchy up
to the single offending AVP. This enables the recipient to detect
the location of the offending AVP when embedded in a group.
It says this of DIAMETER_INVALID_AVP_LENGTH in 7.1.5:
The request contained an AVP with an invalid length. A Diameter
message indicating this error MUST include the offending AVPs
within a Failed-AVP AVP. In cases where the erroneous AVP length
value exceeds the message length or is less than the minimum AVP
header length, it is sufficient to include the offending AVP
header and a zero filled payload of the minimum required length
for the payloads data type. If the AVP is a Grouped AVP, the
Grouped AVP header with an empty payload would be sufficient to
indicate the offending AVP. In the case where the offending AVP
header cannot be fully decoded when the AVP length is less than
the minimum AVP header length, it is sufficient to include an
offending AVP header that is formulated by padding the incomplete
AVP header with zero up to the minimum AVP header length.
The AVPs placed in the errors field of a diameter_packet record are
intended to be appropriate for inclusion in a Failed-AVP, but neither of
the above paragraphs has been followed in the Grouped case: the entire
faulty AVP (non-faulty components and all) has been included. This made
it impossible to identify the actual faulty AVP in all but simple case.
This commit adapts the decode to the RFC, and implements the suggested
single faulty AVP, nested in as many Grouped containers as required.
The best-effort decode of Failed-AVP in answer messages, initially
implemented in commit 0f9cdbaf, is also applied.
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* anders/diameter/test/OTP-12767:
Replace config suite call to erlang:now/0
Fix incorrect suite usage of OTP 18 monotonic time
Make tls suite crash more verbosely
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* anders/diameter/sctp/OTP-12744:
Fix diameter_sctp listener race
Tweak transport suite failures
Run traffic suite over SCTP
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Make anything but a comm_up sctp_assoc_change crash. Make timeouts more
reasonable.
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Previously it was only run over TCP.
Configure a pool of accepting processes since simultaneous connections
are otherwise prone to rejection, as discussed in commit 4b691d8d.
Tweak timeouts to more reasonable values.
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To remove a compilation warning with OTP 18.
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Value was used as strictly increasing when it's only non-decreasing,
causing testcases to fail.
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To see why it's failing on at least one test machine.
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An incoming Diameter message is either a request, an answer to an
outstanding request, or an unexpected answer. The latter weren't
counted, but are now counted on keys of this form:
{pid(), {{unknown, 0}, recv, discarded}}
The form of the second element is similar to those of other counters,
like:
{{relay, 0|1}, send|recv, invalid_error_bit}
Compare this to the key used when counting known answers:
{{ApplicationId, CommandCode, 0}, recv}
The application id and command code aren't included so as not to count
on arbitrary keys, a topic last visited in commit 49e8b11c.
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To differentiate between requests and answers, in analogy with relay
counters. This isn't backwards compatible, but these counters aren't yet
documented.
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Which fails for a variety of reasons to be addressed in subsequent
commits.
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