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@@ -0,0 +1,28 @@
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+From f9959d90deb34ddb0b86f91b51dee5ff50997de2 Mon Sep 17 00:00:00 2001
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+From: Alexander Barton <alex@barton.de>
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+Date: Sun, 17 Mar 2024 15:55:39 +0100
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+Subject: [PATCH 20/20] METADATA: Fix unsetting "cloakhost"
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+
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+Correctly re-generate the "cloaked hostname" when removing the
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+"cloakhost" using an empty string by passing down NULL instead of the
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+empty string, which results in protocol violations (for example on
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+WHOIS).
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+
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+(cherry picked from commit 1118b0e77ca961a7b082f90cb124210eca8fb6bd)
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+---
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+ src/ngircd/irc-metadata.c | 4 +++-
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+ 1 file changed, 3 insertions(+), 1 deletion(-)
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+
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+--- a/src/ngircd/irc-metadata.c
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++++ b/src/ngircd/irc-metadata.c
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+@@ -72,7 +72,9 @@
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+ }
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+
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+ if (strcasecmp(Req->argv[1], "cloakhost") == 0) {
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+- Client_UpdateCloakedHostname(target, prefix, Req->argv[2]);
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++ /* Set or remove a "cloaked hostname". */
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++ Client_UpdateCloakedHostname(target, prefix,
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++ *Req->argv[2] ? Req->argv[2] : NULL);
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+ if (Client_Conn(target) > NONE && Client_HasMode(target, 'x'))
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+ IRC_WriteStrClientPrefix(target, prefix,
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+ RPL_HOSTHIDDEN_MSG, Client_ID(target),
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Christoph Biedl