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<title>ouroboros/src/lib/notifier.c, branch master</title>
<subtitle>Ouroboros main repository</subtitle>
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<updated>2026-02-18T06:54:56+00:00</updated>
<entry>
<title>build: Update copyright to 2026</title>
<updated>2026-02-18T06:54:56+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2026-02-15T09:21:02+00:00</published>
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<id>urn:sha1:0d72b59c2964208ea34ce2322978344d7ff1a223</id>
<content type='text'>
Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>ipcpd: Update DHT for unicast layer</title>
<updated>2025-08-06T10:34:15+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2025-08-06T10:29:02+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=fa1af6aaed6a46acd0af1600f4c63e79fcf9ff84'/>
<id>urn:sha1:fa1af6aaed6a46acd0af1600f4c63e79fcf9ff84</id>
<content type='text'>
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 &lt;search factor&gt; (default: 3)]
        [dht_k &lt;replication factor&gt; (default: 8)]
        [dht_t_expire &lt;expiration (s)&gt; (default: 86400)]
        [dht_t_refresh &lt;contact refresh (s)&gt; (default: 900)]
        [dht_t_replicate &lt;replication (s)&gt; (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 --&gt; [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 --&gt; [a62f92abffb451c4|ed:d9:e2:c4].
      cookie: 2d4b7acef8308210
      key:    a62f92abffb451c4 [32 bytes]

    DHT_FIND_NODE_RSP &lt;-- [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 --&gt; [2861814146dbf9b5|ed:d9:e2:c4].
      cookie: 80a1adcb09a2ff0a
      key:    42dee3b0415b4f69 [32 bytes]

    DHT_FIND_VALUE_RSP &lt;-- [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 &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update licenses to 2024</title>
<updated>2024-01-13T09:20:14+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2024-01-05T08:07:30+00:00</published>
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<id>urn:sha1:8742a31bf672c5bc087601ec39ab1feb206d2446</id>
<content type='text'>
Slow but steady.

Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update copyright to 2023</title>
<updated>2023-02-13T20:10:10+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2023-02-09T16:38:30+00:00</published>
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<id>urn:sha1:c3814fa77eb7afbe6e798ded0fdff2df74ad8642</id>
<content type='text'>
2022 was a rather slow year...

Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update copyright to 2022</title>
<updated>2022-04-03T16:01:02+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2022-04-02T08:44:18+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=9639e28fd2dfdb4c2c1fb544b07f2ab6a0395934'/>
<id>urn:sha1:9639e28fd2dfdb4c2c1fb544b07f2ab6a0395934</id>
<content type='text'>
Growing pains.

Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>lib, ipcpd, irmd: Wrap pthread unlocks for cleanup</title>
<updated>2021-06-23T06:36:48+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2021-06-21T18:24:03+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=8ca960fa0274018cb4f94a1826029d74e6f762e0'/>
<id>urn:sha1:8ca960fa0274018cb4f94a1826029d74e6f762e0</id>
<content type='text'>
This add an ouroboros/pthread.h header that wraps the
pthread_..._unlock() functions for cleanup using
pthread_cleanup_push() as this casting is not safe (and there were
definitely bad casts in the code). The close() function is now also
wrapped for cleanup in ouroboros/sockets.h.
This allows enabling more compiler checks.

Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update email addresses</title>
<updated>2021-01-03T10:57:05+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2021-01-02T06:24:35+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=fa2ca608aa06c98c080edf80c00d39d6d90e4d3a'/>
<id>urn:sha1:fa2ca608aa06c98c080edf80c00d39d6d90e4d3a</id>
<content type='text'>
The ugent email addresses are shut down, updated to Ouroboros mail
addresses.

Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update copyright to 2021</title>
<updated>2021-01-03T10:56:28+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2021-01-02T06:24:34+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=505703bcd8cf33279f89c414b008e393cb04522f'/>
<id>urn:sha1:505703bcd8cf33279f89c414b008e393cb04522f</id>
<content type='text'>
Happy New Year, Ouroboros!

Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update copyright to 2020</title>
<updated>2020-01-02T14:07:36+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri@ouroboros.rocks</email>
</author>
<published>2020-01-01T08:48:07+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=435a91165a3c1f8ca715b22ee2c2361d9bd853dd'/>
<id>urn:sha1:435a91165a3c1f8ca715b22ee2c2361d9bd853dd</id>
<content type='text'>
Signed-off-by: Dimitri Staessens &lt;dimitri@ouroboros.rocks&gt;
Signed-off-by: Sander Vrijders &lt;sander@ouroboros.rocks&gt;
</content>
</entry>
<entry>
<title>build: Update copyright to 2019</title>
<updated>2019-02-05T08:58:08+00:00</updated>
<author>
<name>Dimitri Staessens</name>
<email>dimitri.staessens@ugent.be</email>
</author>
<published>2019-02-04T15:37:21+00:00</published>
<link rel='alternate' type='text/html' href='http://www.ouroboros.rocks/cgit/ouroboros/commit/?id=5dd086aa679e3e05d20ef6a19f3fefbe46ffe40e'/>
<id>urn:sha1:5dd086aa679e3e05d20ef6a19f3fefbe46ffe40e</id>
<content type='text'>
Updates the copyright notice in all sources to 2019.

Signed-off-by: Dimitri Staessens &lt;dimitri.staessens@ugent.be&gt;
Signed-off-by: Sander Vrijders &lt;sander.vrijders@ugent.be&gt;
</content>
</entry>
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