More skeleton

Signed-off-by: Laurent Bercot <ska@appnovation.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/cache/dns.c b/src/cache/dns.c
new file mode 100644
index 0000000..ce5b611
--- /dev/null
+++ b/src/cache/dns.c
@@ -0,0 +1,38 @@
+/* ISC license. */
+
+#include <skalibs/uint16.h>
+
+#include <s6-dns/s6dns.h>
+
+#include "shibari-cache-internal.h"
+
+int dns_newquery (uint8_t source, uint16_t i, char const *ip, uint16_t port, char const *buf, uint16_t len)
+{
+  dcache_key_t data ;
+  s6dns_message_header_t hdr ;
+  s6dns_message_counts_t counts ;
+  s6dns_domain_t name ;
+  unsigned int pos ;
+  unsigned int rcode ;
+  uint16_t qtype ;
+  char key[257] ;
+
+  if (!s6dns_message_parse_init(&hdr, &counts, buf, len, &pos)) return 1 ;
+  if (hdr.opcode) { rcode = 4 ; goto err ; }
+  if (!hdr.rd) { rcode = 1 ; goto err ; }
+  if (!s6dns_message_parse_question(&counts, &name, &qtype, buf, len, &pos)
+   || !s6dns_domain_encode(&name))
+  {
+    rcode = errno == ENOTSUP ? 4 : 1 ;
+    goto answer ;
+  }
+  
+  if (cache_search(&name, qtype, &data)) goto got ;
+  return 1 ;
+
+ answer:
+  return 1 ;
+ err:
+ got :
+  return 1 ;
+}