Add s6dns_message_parse_question

1 files changed, 20 insertions, 0 deletions

diff --git a/src/libs6dns/s6dns_message_parse_question.c b/src/libs6dns/s6dns_message_parse_question.c
new file mode 100644
index 0000000..e2b639f
--- /dev/null
+++ b/src/libs6dns/s6dns_message_parse_question.c
@@ -0,0 +1,20 @@
+/* ISC license. */
+
+#include <errno.h>
+
+#include <skalibs/posixishard.h>
+#include <skalibs/uint16.h>
+
+#include <s6-dns/s6dns-constants.h>
+#include <s6-dns/s6dns-message.h>
+
+int s6dns_message_parse_question (s6dns_domain_t *name, uint16_t *qtype, char const *packet, unsigned int packetlen, unsigned int *pos)
+{
+  uint16_t qclass ;
+  if (!s6dns_message_get_domain(name, 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) ;
+  return 1 ;
+}