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-rw-r--r--source4/librpc/ndr/ndr_sec.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/source4/librpc/ndr/ndr_sec.h b/source4/librpc/ndr/ndr_sec.h
index 27a1311adc..728d46535d 100644
--- a/source4/librpc/ndr/ndr_sec.h
+++ b/source4/librpc/ndr/ndr_sec.h
@@ -22,7 +22,17 @@
*/
-/* use the same structure for dom_sid2 as dom_sid */
+/*
+ use the same structure for dom_sid2 as dom_sid. A dom_sid2 is really
+ just a dom sid, but with the sub_auths represented as a conformant
+ array. As with all in-structure conformant arrays, the array length
+ is placed before the start of the structure. That's what gives rise
+ to the extra num_auths elemenent. We don't want the Samba code to
+ have to bother with such esoteric NDR details, so its easier to just
+ define it as a dom_sid and use pidl magic to make it all work. It
+ just means you need to mark a sid as a "dom_sid2" in the IDL when you
+ know it is of the conformant array variety
+*/
#define dom_sid2 dom_sid
/* query security descriptor */