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From: Corinna Vinschen <>
Subject: [newlib-cygwin] Cygwin: resolver: Targets in SRV DNS responses may not be compressed
Date: Wed, 19 Jan 2022 07:55:48 +0000 (GMT)	[thread overview]
Message-ID: <> (raw);h=54f0590a661fc76036a524ca81b9d5375402c233

commit 54f0590a661fc76036a524ca81b9d5375402c233
Author: Anton Lavrentiev via Cygwin-patches <>
Date:   Tue Jan 18 17:39:16 2022 -0500

    Cygwin: resolver: Targets in SRV DNS responses may not be compressed
    RFC2782 clearly says so yet it's a common misconception to perform the
    compression in the violation of the standard.  This patch fixes that

 winsup/cygwin/libc/minires-os-if.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/winsup/cygwin/libc/minires-os-if.c b/winsup/cygwin/libc/minires-os-if.c
index 8d3178f70..5da1c0c55 100644
--- a/winsup/cygwin/libc/minires-os-if.c
+++ b/winsup/cygwin/libc/minires-os-if.c
@@ -159,6 +159,7 @@ static unsigned char * write_record(unsigned char * ptr, PDNS_RECORD rr,
       PUTSHORT(rr->Data.SRV.wWeight, ptr);
       PUTSHORT(rr->Data.SRV.wPort, ptr);
+    dnptrs = 0;  /* compression not allowed */
     PUTDOMAIN(rr->Data.SRV.pNameTarget, ptr);

                 reply	other threads:[~2022-01-19  7:55 UTC|newest]

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