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This is a rewrite of the DHT for name-to-address resolution in the
unicast layer. It is now integrated as a proper directory policy. The
dir_wait_running function is removed, instead the a DHT peer is passed
on during IPCP enrolment.
Each DHT request/response gets a random 64-bit ID ('cookie'). DHT
messages to the same peer are deduped, except in the case when the DHT
is low on contacts. In that case, it will contact the per it received
at enrolment for more contacts. To combat packet loss, these messages
are not deduped by means of a 'magic cookie', chosen at random when
the DHT starts.
The DHT parameters (Kademlia) can be set using the configfile or the
IRM command line tools:
if DIRECTORY_POLICY == DHT
[dht_alpha <search factor> (default: 3)]
[dht_k <replication factor> (default: 8)]
[dht_t_expire <expiration (s)> (default: 86400)]
[dht_t_refresh <contact refresh (s)> (default: 900)]
[dht_t_replicate <replication (s)> (default: 900)]
This commit also adds support for a protocol debug level (PP).
Protocol debugging for the DHT can be enabled using the
DEBUG_PROTO_DHT build flag.
The DHT has the following message types:
DHT_STORE, sent to k peers. Not acknowledged.
DHT_STORE --> [2861814146dbf9b5|ed:d9:e2:c4].
key: bcc236ab6ec69e65 [32 bytes]
val: 00000000c4e2d9ed [8 bytes]
exp: 2025-08-03 17:29:44 (UTC).
DHT_FIND_NODE_REQ, sent to 'alpha' peers, with a corresponding
response. This is used to update the peer routing table to iteratively
look for the nodes with IDs closest to the requested key.
DHT_FIND_NODE_REQ --> [a62f92abffb451c4|ed:d9:e2:c4].
cookie: 2d4b7acef8308210
key: a62f92abffb451c4 [32 bytes]
DHT_FIND_NODE_RSP <-- [2861814146dbf9b5|ed:d9:e2:c4].
cookie: 2d4b7acef8308210
key: a62f92abffb451c4 [32 bytes]
contacts: [1]
[a62f92abffb451c4|9f:0d:c1:fb]
DHT_FIND_VALUE_REQ, sent to 'k' peers, with a corresponding
response. Used to find a value for a key. Will also send its closest
known peers in the response.
DHT_FIND_VALUE_REQ --> [2861814146dbf9b5|ed:d9:e2:c4].
cookie: 80a1adcb09a2ff0a
key: 42dee3b0415b4f69 [32 bytes]
DHT_FIND_VALUE_RSP <-- [2861814146dbf9b5|ed:d9:e2:c4].
cookie: 80a1adcb09a2ff0a
key: 42dee3b0415b4f69 [32 bytes]
values: [1]
00000000c4e2d9ed [8 bytes]
contacts: [1]
[a62f92abffb451c4|9f:0d:c1:fb]
Also removes ubuntu 20 from appveyor config as it is not supported anymore.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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AF_INET is defined in <sys/socket.h> on FreeBSD.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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The argc counter was improperly reset before building the arguments
list.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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This is a full revision of the IRMd internal implementation.
The registry is now a proper subcomponent managing its own internal
lock (a single mutex). Some tests are added for the registry and its
data structures. Some macros for tests are added in <ouroboros/test.h>.
Flow allocation is now more symmetric between the client side (alloc)
and server size (accept). Each will create a flow in pending state
(ALLOC_PENDING/ACCEPT_PENDING) that is potentially fulfilled by an
IPCP using respond_alloc and respond_accept primitives. Deallocation
is split in flow_dealloc (application side) and ipcp_flow_dealloc
(IPCP side) to get the flow in DEALLOC_PENDING and DEALLOCATED state.
Cleanup of failed flow allocation is now properly handled instead of
relying on the sanitizer thread. The new sanitizer only needs to
monitor crashed processes.
On shutdown, the IRMd will now detect hanging processes and SIGKILL
them and clean up their fuse mountpoints if needed.
A lot of other things have been cleaned up and shuffled around a bit.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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Error instead of warn when the --config param is set, but the file is
not found. This prevents the IRMd from being in a 'half state', where it
is started, but the expected config is not applied.
One simply has to remove the --config option OR supply a correct
filepath.
Also fix compile option for the help message.
Signed-off-by: Thijs Paelman <thijs@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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Slow but steady.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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New method retains the original string in parsing the args string into
an argv dynamic array. Previous method (`strtok`) didn't work,
because it is a destructive function, changing the supplied string. We
however needed to apply it twice to the same string. It is still done
twice in a loop, to make sure argc is exact. Other methods, like
counting the amount of spaces to determine argc, would be incorrect
for his particular way of tokenizing if arguments are separated by
e.g. two spaces.
Also fixes a wrong pointer dereference, which did go unnoticed before
due to the previous error.
Signed-off-by: Thijs Paelman <thijs@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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The information for an IPCP is now stored in an ipcp_info struct,
containing name and type. The IRM public API is not changed.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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The layer_info had a member layer_name which is a bit
redundant.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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Config files that had service names without the args option specified
would cause the IRMd to segfault.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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Rename internal data structures so it's clear that they are the IRMd
representation of these objects for management purposes.
Split functionality for these objects off and and move them to their
own source files.
Rename internal functions of the IRMd to reflect this, with some small
refactoring.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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This adds initial support for configuration files using the C99 TOML
parser (to be installed separately from https://github.com/cktan/tomlc99).
The default location for the IRMd configuration file is
/etc/ouroboros/irmd.conf. This is configurable at build time.
An example file will be installed in the configuration directory with
the name irmd.conf.example.
Config file support can be disabled using the DISABLE_CONFIGFILE build
option.
There were some refactors and changes to the configuration messages
and protobuf files. This works towards consolidation of protobuf C as
an option for more generic handling of serialization/deserialization
of various messages.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
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