[PATCH 5/5] Cygwin: resolver: Added processing of AAAA records
Anton Lavrentiev
lavr@ncbi.nlm.nih.gov
Mon Jan 17 18:03:14 GMT 2022
AAAA records returned from Windows resolver were flagged as "No structure" in
debug output because of being processed (although correctly) in the default
catch-all case. This patch makes the AAAA records properly recognized.
---
winsup/cygwin/libc/minires-os-if.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/winsup/cygwin/libc/minires-os-if.c b/winsup/cygwin/libc/minires-os-if.c
index 6b4c5e33e..bb6786f6c 100644
--- a/winsup/cygwin/libc/minires-os-if.c
+++ b/winsup/cygwin/libc/minires-os-if.c
@@ -69,15 +69,14 @@ static unsigned char * write_record(unsigned char * ptr, PDNS_RECORD rr,
switch(rr->wType) {
case DNS_TYPE_A:
+ case DNS_TYPE_AAAA:
{
- u_int8_t * aptr = (u_int8_t *) & rr->Data.A.IpAddress;
- if (ptr + 4 <= EndPtr) {
- ptr[0] = aptr[0];
- ptr[1] = aptr[1];
- ptr[2] = aptr[2];
- ptr[3] = aptr[3];
- }
- ptr += 4;
+ u_int8_t * aptr = rr->wType == DNS_TYPE_A
+ ? (u_int8_t *) & rr->Data.A.IpAddress : (u_int8_t *) & rr->Data.AAAA.Ip6Address;
+ int sz = rr->wType == DNS_TYPE_A ? NS_INADDRSZ/*4*/ : NS_IN6ADDRSZ/*16*/;
+ if (ptr + sz <= EndPtr)
+ memcpy(ptr, aptr, sz);
+ ptr += sz;
break;
}
case DNS_TYPE_NS:
--
2.33.0
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