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spec/scansion/blocking.scs @ 12446:e54b8a5e35ad 0.12
util.random: Test whether util.crand works before using it (fix #1734)
util.crand can be configured at compile time to use the Linux
getrandom() system call, available from Linux 3.17, but it is still
possible to load it with an older kernel lacking that system call, where
attempting to use it throws an ENOSYS error.
By testing for this on load we can fall back to /dev/urandom in this
case.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sat, 02 Apr 2022 16:33:27 +0200 |
parent | 10812:3bd846c76701 |
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# XEP-0191: Blocking Command [Client] Romeo jid: blocker@localhost password: password [Client] Juliet jid: blockee@localhost password: password ----- # The parties connect Romeo connects Romeo sends: <presence/> Romeo receives: <presence from="${Romeo's full JID}"/> Juliet connects Juliet sends: <presence/> Juliet receives: <presence from="${Juliet's full JID}"/> # They add each other Romeo sends: <presence type="subscribe" to="${Juliet's JID}"/> Romeo receives: <presence from="${Juliet's JID}" to="${Romeo's JID}" type="unavailable"/> Juliet receives: <presence type="subscribe" to="${Juliet's JID}" from="${Romeo's JID}"/> Juliet sends: <presence type="subscribed" to="${Romeo's JID}"/> Romeo receives: <presence from="${Juliet's full JID}" to="${Romeo's JID}"> <delay xmlns="urn:xmpp:delay" stamp="{scansion:any}" from="localhost"/> </presence> Juliet sends: <presence type="subscribe" to="${Romeo's JID}"/> Juliet receives: <presence from="${Romeo's JID}" to="${Juliet's JID}" type="unavailable"/> Romeo receives: <presence type="subscribe" to="${Romeo's JID}" from="${Juliet's JID}"/> Romeo sends: <presence type="subscribed" to="${Juliet's JID}"/> Juliet receives: <presence from="${Romeo's full JID}" to="${Juliet's JID}"> <delay xmlns="urn:xmpp:delay" stamp="{scansion:any}" from="localhost"/> </presence> Romeo receives: <presence from="${Juliet's full JID}" to="${Romeo's JID}"> <delay xmlns="urn:xmpp:delay" stamp="{scansion:any}" from="localhost"/> </presence> # They can now talk Juliet sends: <message type="chat" to="${Romeo's JID}"> <body>ohai</body> </message> Romeo receives: <message type="chat" to="${Romeo's JID}" from="${Juliet's full JID}"> <body>ohai</body> </message> # And now to the blockining Romeo sends: <iq type="set" id="lx2"> <block xmlns="urn:xmpp:blocking"> <item jid="${Juliet's JID}"/> </block> </iq> Romeo receives: <iq type="result" id="lx2"/> Juliet receives: <presence type="unavailable" to="${Juliet's JID}" from="${Romeo's full JID}"/> # Can"t talk anymore Romeo sends: <message type="chat" to="${Juliet's JID}"> <body>hello?</body> </message> Romeo receives: <message type="error" from="${Juliet's JID}"> <error type="cancel"> <not-acceptable xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/> <text xmlns="urn:ietf:params:xml:ns:xmpp-stanzas">You have blocked this JID</text> <blocked xmlns="urn:xmpp:blocking:errors"/> </error> </message> Juliet sends: <message type="chat" to="${Romeo's JID}"/> Juliet receives: <message type="error" from="${Romeo's JID}"> <error type="cancel"> <service-unavailable xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/> </error> </message> Romeo sends: <iq type="set" id="lx3"> <unblock xmlns="urn:xmpp:blocking"> <item jid="${Juliet's JID}"/> </unblock> </iq> Juliet receives: <presence to="${Juliet's JID}" from="${Romeo's full JID}"> <delay xmlns="urn:xmpp:delay" stamp="{scansion:any}" from="localhost"/> </presence> Romeo receives: <iq type="result" id="lx3"/> # Can talk again Romeo sends: <message type="chat" to="${Juliet's JID}"> <body>hello!</body> </message> Juliet receives: <message type="chat" to="${Juliet's JID}" from="${Romeo's full JID}"> <body>hello!</body> </message> # Bye Juliet sends: <presence type="unavailable"/> Juliet disconnects Romeo receives: <presence from="${Juliet's full JID}" to="${Romeo's JID}" type="unavailable"/> Romeo sends: <presence type="unavailable"/> Romeo disconnects