From 2d78c35314f0310561cabefea8564123ccbb2622 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Sat, 2 Dec 2023 10:23:03 +0000
Subject:  Add nodecode functions for get_domain and parse_question

 Also make sure get_domain always returns lowercase.

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/libs6dns/deps-lib/s6dns                        |  1 +
 src/libs6dns/s6dns_message_get_domain_nodecode.c   |  2 ++
 src/libs6dns/s6dns_message_parse_question.c        | 21 ++--------------
 .../s6dns_message_parse_question_nodecode.c        | 28 ++++++++++++++++++++++
 4 files changed, 33 insertions(+), 19 deletions(-)
 create mode 100644 src/libs6dns/s6dns_message_parse_question_nodecode.c

(limited to 'src/libs6dns')

diff --git a/src/libs6dns/deps-lib/s6dns b/src/libs6dns/deps-lib/s6dns
index 266b574..818e913 100644
--- a/src/libs6dns/deps-lib/s6dns
+++ b/src/libs6dns/deps-lib/s6dns
@@ -84,6 +84,7 @@ s6dns_message_parse_getrr.o
 s6dns_message_parse_init.o
 s6dns_message_parse_next.o
 s6dns_message_parse_question.o
+s6dns_message_parse_question_nodecode.o
 s6dns_message_parse_skipqd.o
 s6dns_rci_free.o
 s6dns_rci_here.o
diff --git a/src/libs6dns/s6dns_message_get_domain_nodecode.c b/src/libs6dns/s6dns_message_get_domain_nodecode.c
index 9774527..d3678db 100644
--- a/src/libs6dns/s6dns_message_get_domain_nodecode.c
+++ b/src/libs6dns/s6dns_message_get_domain_nodecode.c
@@ -4,6 +4,7 @@
 #include <errno.h>
 
 #include <skalibs/posixishard.h>
+#include <skalibs/bytestr.h>
 
 #include <s6-dns/s6dns-message.h>
 
@@ -45,5 +46,6 @@ size_t s6dns_message_get_domain_nodecode (char *out, size_t outmax, char const *
     }
     else return (errno = EPROTONOSUPPORT, 0) ; /* unsupported extension */
   }
+  case_lowerb(out, w) ;
   return w ;
 }
diff --git a/src/libs6dns/s6dns_message_parse_question.c b/src/libs6dns/s6dns_message_parse_question.c
index 780ec22..484774c 100644
--- a/src/libs6dns/s6dns_message_parse_question.c
+++ b/src/libs6dns/s6dns_message_parse_question.c
@@ -1,26 +1,9 @@
 /* ISC license. */
 
-#include <errno.h>
-
-#include <skalibs/posixishard.h>
-#include <skalibs/uint16.h>
-
-#include <s6-dns/s6dns-constants.h>
+#include <s6-dns/s6dns-domain.h>
 #include <s6-dns/s6dns-message.h>
 
 int s6dns_message_parse_question (s6dns_message_counts_t *counts, s6dns_domain_t *name, uint16_t *qtypep, char const *packet, unsigned int packetlen, unsigned int *pos)
 {
-  s6dns_domain_t d ;
-  uint16_t qtype ;
-  uint16_t qclass ;
-  if (!counts->qd) return (errno = EINVAL, 0) ;
-  if (!s6dns_message_get_domain(&d, packet, packetlen, pos)) return 0 ;
-  if (*pos + 4 > packetlen) return (errno = EPROTO, 0) ;
-  uint16_unpack_big(packet + *pos, &qtype) ; *pos += 2 ;
-  uint16_unpack_big(packet + *pos, &qclass) ; *pos += 2 ;
-  if (qclass != S6DNS_C_IN) return (errno = ENOTSUP, 0) ;
-  counts->qd-- ;
-  *name = d ;
-  *qtypep = qtype ;
-  return 1 ;
+  return s6dns_message_parse_question_nodecode(counts, name, qtypep, packet, packetlen, pos) && s6dns_domain_decode(name) ;
 }
diff --git a/src/libs6dns/s6dns_message_parse_question_nodecode.c b/src/libs6dns/s6dns_message_parse_question_nodecode.c
new file mode 100644
index 0000000..f6cc4a7
--- /dev/null
+++ b/src/libs6dns/s6dns_message_parse_question_nodecode.c
@@ -0,0 +1,28 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <errno.h>
+
+#include <skalibs/posixishard.h>
+#include <skalibs/uint16.h>
+
+#include <s6-dns/s6dns-constants.h>
+#include <s6-dns/s6dns-domain.h>
+#include <s6-dns/s6dns-message.h>
+
+int s6dns_message_parse_question_nodecode (s6dns_message_counts_t *counts, s6dns_domain_t *name, uint16_t *qtypep, char const *packet, unsigned int packetlen, unsigned int *pos)
+{
+  s6dns_domain_t d ;
+  uint16_t qtype ;
+  uint16_t qclass ;
+  if (!counts->qd) return (errno = EINVAL, 0) ;
+  if (!s6dns_message_get_domain_nodecode(&d, packet, packetlen, pos)) return 0 ;
+  if (*pos + 4 > packetlen) return (errno = EPROTO, 0) ;
+  uint16_unpack_big(packet + *pos, &qtype) ; *pos += 2 ;
+  uint16_unpack_big(packet + *pos, &qclass) ; *pos += 2 ;
+  if (qclass != S6DNS_C_IN) return (errno = ENOTSUP, 0) ;
+  counts->qd-- ;
+  *name = d ;
+  *qtypep = qtype ;
+  return 1 ;
+}
-- 
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