1 files changed, 24 insertions, 0 deletions
diff --git a/src/libs6dns/s6dns_message_get_caa.c b/src/libs6dns/s6dns_message_get_caa.c
new file mode 100644
index 0000000..a97b8c0
--- /dev/null
+++ b/src/libs6dns/s6dns_message_get_caa.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <skalibs/error.h>
+#include <s6-dns/s6dns-message.h>
+
+int s6dns_message_get_caa (s6dns_message_rr_caa_t *caa, char const *packet, unsigned int packetlen, unsigned int *pos, uint16_t rdlength)
+{
+  unsigned char taglen ;
+  if (rdlength < 4) return (errno = EPROTO, 0) ;
+  if (*pos + rdlength > packetlen) return (errno = EPROTO, 0) ;
+  caa->flags = packet[(*pos)++] ;
+  taglen = packet[(*pos)++] ;
+  if (rdlength < taglen + 3 || rdlength > taglen + 257) return (errno = EPROTO, 0) ;
+  memcpy(caa->tag, packet + *pos, taglen) ;
+  caa->tag[taglen] = 0 ;
+  *pos += taglen ;
+  memcpy(caa->value, packet + *pos, rdlength - taglen - 2) ;
+  caa->value[rdlength - taglen - 1] = 0 ;
+  *pos += rdlength - taglen - 2 ;
+  return 1 ;
+}